Abstract Today many people are attracted towards distribution generation (DG) because of low energy cost power supply, local generation, highly reliable system, supply with good power quality. Increasing attention and investment in renewable energy that is DG energy sources give rise to rapid development of high penetration renewable energy sources like solar energy, wind energy, hydro energy. Out of this most important and best is the solar energy. There are multiple ways to interface PV arrays with the power grid, but in there is problem of power quality. Today’s important concern of the power system is the power quality in case of renewable energy sources. The power quality improvement in the interconnected micro grid systems and grid interconnection with Distribution Generation (DGs) is the challenging task and to overcome the power quality problem passive filters are the best and cost effective solution. In this paper the LCLR filter is implemented between inverter and grid. The complete system consists of photovoltaic cell (PV), DC-DC boost converter, DC-AC inverter, LCLR filter and the grid. This paper also consists of complete MATLAB simulation of PV cell, DC-DC boost converter and inverter with LCLR filter. Key Words: Renewable energy, PV module, DC-DC boost converter, DGs, LCLR filter, power quality, micro grid (MG) and THD
A Novel Control Method for Unified Power Quality Conditioner Using Nine-Switc...IJERA Editor
A nine-switch power converter having two sets of out-put terminals was recently proposed in place of the traditional back-to-back power converter that uses 12 switches in total. The nine-switch converter has already been proven to have certain advantages, in addition to its component saving topological feature. Despite these advantages, the nine-switch converter has so far found limited applications due to its many perceived performance tradeoffs like requiring an oversized dc-link capacitor, limited amplitude sharing, and constrained phase shift between its two sets of output terminals. Instead of accepting these tradeoffs as limitations, a nine-switch power conditioner is proposed here that virtually “converts” most of these topological short comings into interesting performance advantages. Aiming further to reduce its switching losses, an appropriate discontinuous modulation scheme is proposed and studied here in detail to doubly ensure that maxi-mal reduction of commutations is achieved. With an appropriately designed control scheme then incorporated, the nine-switch converter is shown to favorably raise the overall power quality in experiment, hence justifying its role as a power conditioner at a reduced semiconductor cost.
Control Method for Unified Power Quality Conditioner Using Fuzzy Based Nine-S...IJERA Editor
A nine-switch power converter having two sets of out-put terminals was recently proposed in place of the
traditional back-to-back power converter that uses 12 switches in total. The nine-switch converter has already
been proven to have certain advantages, in addition to its component saving topological feature. Despite these
advantages, the nine-switch converter has so far found limited applications due to its many perceived
performance tradeoffs like requiring an oversized dc-link capacitor, limited amplitude sharing, and constrained
phase shift between its two sets of output terminals. Instead of accepting these tradeoffs as limitations, a nineswitch
power conditioner is proposed here that virtually “converts” most of these topological short comings into
interesting performance advantages. Aiming further to reduce its switching losses, an appropriate discontinuous
modulation scheme is proposed and studied here in detail to doubly ensure that maxi-mal reduction of
commutations is achieved. With an appropriately designed control scheme then incorporated, the nine-switch
converter is shown to favorably raise the overall power quality in experiment, hence justifying its role as a
power conditioner at a reduced semiconductor cost.
Implementation of Instantaneous Reactive Power Theory for Current Harmonic Re...IOSR Journals
This document discusses implementing the instantaneous reactive power theory (IRP theory) for current harmonic reduction and reactive power compensation in a three phase four wire power system. The IRP theory defines instantaneous power components in the α-β-0 coordinate system. It can calculate the reference compensating currents required by a shunt active power filter to inject into the network. Simulations show the power filter can reduce current harmonics and reactive power, improving the power factor by making the source current sinusoidal and in phase with the voltage. The IRP theory provides a flexible way to select the undesirable power components for compensation to minimize pollution from nonlinear loads.
High Phase Order Transmission System: “A solution for Electrical Power Transm...IJERD Editor
1) The document discusses converting existing three-phase double circuit 400kV transmission lines to six-phase transmission lines as a solution for bulk power transmission over long distances.
2) Simulation results show that six-phase transmission allows for 1.7-1.74 times more power transfer capability compared to the three-phase line. It also allows for lower transmission voltages and reduced tower sizes for the same power transferred.
3) Fault current magnitudes are lower for six-phase transmission compared to three-phase transmission for the same fault type and location, with four-phase to ground faults being the most severe for six-phase lines. Load voltages also exhibit less distortion for faults on six-phase lines.
Performance Improvement of the Radial Distribution System by using Switched C...idescitation
Distribution system is the major link which provides supply to the consumers
from the high voltage transmission system. The load on the distribution system is not
constant and it changes with respect to time throughout the working period. The voltage
drop and power losses occur in the distribution system mainly depends on the nature of the
load which is applied on the system. The voltage drop and power losses frequently occurs
mainly on those systems which are supplying load to the industrial areas, this is mainly
because of the existence of more reactive power. To overcome these problems shunt
compensation is employed to reduce or suppress those effects to an extent. The main aim of
this paper is to determine the specific value of the shunt capacitance required to achieve the
permissible voltage tolerance limits and maximum percentage of power loss reduction in a
sample two feeder radial distribution system.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Enhancement in Power Quality With Grid Interconnection of Renewable Energy So...IJERA Editor
At present the Renewable energy resources (RES) are being increasingly connected in distribution systems utilizing power electronic converters. This paper presents a novel control strategy for achieving maximum benefits from these grid-interfacing inverters when installed in 3-phase 4-wire distribution systems. The inverter is controlled to perform as a multi-function device by incorporating active power filter functionality. The inverter can thus be utilized as power converter to inject power generated from RES to the grid and shunt APF to compensate current unbalance, load current harmonics, load reactive power demand and load neutral current. All of these functions may be accomplished either individually or simultaneously. With such a control, the combination of grid-interfacing inverter and the 3-phase 4-wire linear/non-linear unbalanced load at point of common coupling appears as balanced linear load to the grid. This new control concept is demonstrated with extensive MATLAB/Simulink simulation studies and validated through digital signal processor-based laboratory experimental results.
A Novel Control Method for Unified Power Quality Conditioner Using Nine-Switc...IJERA Editor
A nine-switch power converter having two sets of out-put terminals was recently proposed in place of the traditional back-to-back power converter that uses 12 switches in total. The nine-switch converter has already been proven to have certain advantages, in addition to its component saving topological feature. Despite these advantages, the nine-switch converter has so far found limited applications due to its many perceived performance tradeoffs like requiring an oversized dc-link capacitor, limited amplitude sharing, and constrained phase shift between its two sets of output terminals. Instead of accepting these tradeoffs as limitations, a nine-switch power conditioner is proposed here that virtually “converts” most of these topological short comings into interesting performance advantages. Aiming further to reduce its switching losses, an appropriate discontinuous modulation scheme is proposed and studied here in detail to doubly ensure that maxi-mal reduction of commutations is achieved. With an appropriately designed control scheme then incorporated, the nine-switch converter is shown to favorably raise the overall power quality in experiment, hence justifying its role as a power conditioner at a reduced semiconductor cost.
Control Method for Unified Power Quality Conditioner Using Fuzzy Based Nine-S...IJERA Editor
A nine-switch power converter having two sets of out-put terminals was recently proposed in place of the
traditional back-to-back power converter that uses 12 switches in total. The nine-switch converter has already
been proven to have certain advantages, in addition to its component saving topological feature. Despite these
advantages, the nine-switch converter has so far found limited applications due to its many perceived
performance tradeoffs like requiring an oversized dc-link capacitor, limited amplitude sharing, and constrained
phase shift between its two sets of output terminals. Instead of accepting these tradeoffs as limitations, a nineswitch
power conditioner is proposed here that virtually “converts” most of these topological short comings into
interesting performance advantages. Aiming further to reduce its switching losses, an appropriate discontinuous
modulation scheme is proposed and studied here in detail to doubly ensure that maxi-mal reduction of
commutations is achieved. With an appropriately designed control scheme then incorporated, the nine-switch
converter is shown to favorably raise the overall power quality in experiment, hence justifying its role as a
power conditioner at a reduced semiconductor cost.
Implementation of Instantaneous Reactive Power Theory for Current Harmonic Re...IOSR Journals
This document discusses implementing the instantaneous reactive power theory (IRP theory) for current harmonic reduction and reactive power compensation in a three phase four wire power system. The IRP theory defines instantaneous power components in the α-β-0 coordinate system. It can calculate the reference compensating currents required by a shunt active power filter to inject into the network. Simulations show the power filter can reduce current harmonics and reactive power, improving the power factor by making the source current sinusoidal and in phase with the voltage. The IRP theory provides a flexible way to select the undesirable power components for compensation to minimize pollution from nonlinear loads.
High Phase Order Transmission System: “A solution for Electrical Power Transm...IJERD Editor
1) The document discusses converting existing three-phase double circuit 400kV transmission lines to six-phase transmission lines as a solution for bulk power transmission over long distances.
2) Simulation results show that six-phase transmission allows for 1.7-1.74 times more power transfer capability compared to the three-phase line. It also allows for lower transmission voltages and reduced tower sizes for the same power transferred.
3) Fault current magnitudes are lower for six-phase transmission compared to three-phase transmission for the same fault type and location, with four-phase to ground faults being the most severe for six-phase lines. Load voltages also exhibit less distortion for faults on six-phase lines.
Performance Improvement of the Radial Distribution System by using Switched C...idescitation
Distribution system is the major link which provides supply to the consumers
from the high voltage transmission system. The load on the distribution system is not
constant and it changes with respect to time throughout the working period. The voltage
drop and power losses occur in the distribution system mainly depends on the nature of the
load which is applied on the system. The voltage drop and power losses frequently occurs
mainly on those systems which are supplying load to the industrial areas, this is mainly
because of the existence of more reactive power. To overcome these problems shunt
compensation is employed to reduce or suppress those effects to an extent. The main aim of
this paper is to determine the specific value of the shunt capacitance required to achieve the
permissible voltage tolerance limits and maximum percentage of power loss reduction in a
sample two feeder radial distribution system.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Enhancement in Power Quality With Grid Interconnection of Renewable Energy So...IJERA Editor
At present the Renewable energy resources (RES) are being increasingly connected in distribution systems utilizing power electronic converters. This paper presents a novel control strategy for achieving maximum benefits from these grid-interfacing inverters when installed in 3-phase 4-wire distribution systems. The inverter is controlled to perform as a multi-function device by incorporating active power filter functionality. The inverter can thus be utilized as power converter to inject power generated from RES to the grid and shunt APF to compensate current unbalance, load current harmonics, load reactive power demand and load neutral current. All of these functions may be accomplished either individually or simultaneously. With such a control, the combination of grid-interfacing inverter and the 3-phase 4-wire linear/non-linear unbalanced load at point of common coupling appears as balanced linear load to the grid. This new control concept is demonstrated with extensive MATLAB/Simulink simulation studies and validated through digital signal processor-based laboratory experimental results.
A fault-tolerant photovoltaic integrated shunt active power filter with a 27-...IJECEIAES
This paper introduces a fault-tolerant shunt active power filter (SAPF). The novility in of this work is that it poposes a solutions to increase the reliability of shunt active power filter to maintain its operation under a single-phase open-circuit fault in the SAPF. This will increase the reliability of the whole power system. The SAPF is composed of a 4-leg 27-level inverter based on asymmetric cascaded H-bridge topology. If an open-circuit fault is introduced to the operation of the SAPF, a special control technique will be implemented and the redundant leg of the SAPF will be activated. The faulttolerant SAPF can do many tasks under healthy operating conditions and post and open circuit fault depending on the state of charge (SOC) of the batteries. It can mitigate harmonics in the power system, improve power factor in the system by injecting reactive power, and inject real power to the system. The proposed SAPF is tested and simulated in MATLAB/Simulink and the results have shown a significant improvement in total harmonics distortion (THD) of the source current from 13.9% to 3.9% under the normal operating condition and from 42% to 8.4% post and open circuit fault.
Power optimization using six phase transmission systems provides several benefits over traditional three phase systems. A six phase system can transfer up to 73% more power than a three phase double circuit line using the same transmission right-of-way. Six phase systems have lower line voltages for the same power transfer, reducing electric field, radio noise, audible noise, and corona losses. While six phase end equipment such as transformers and circuit breakers are more expensive, the reduced line costs result in similar total costs compared to upgraded three phase systems. Studies have shown six phase systems to have better reliability, voltage regulation, stability, and current balance.
Research Inventy : International Journal of Engineering and Scienceresearchinventy
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
presentation of Conference On Electrical And Electronic Engineering 2015sager alswed
The designed three phase SAPF based on instantaneous p-q theory was simulated in MATLAB /SIMULINK by using different load conditions i.e. R-L load, suddenly connected R-L load, and additional unbalance R load. Its application was successfully proved and the validity achieved by minimizing the harmonics and improving PF as summarized in Table 2. Consequently, the supply current is almost pure sinusoidal. THD observed was fund to be within the prescribed limits of 5% as recommended by IEEE-519 standard.
ترجمه مقاله انگلیسی
ترجمه مقاله ژورنال ساینس دایرکت در دارالترجمه انگلیسی پارسیس
دپارتمان ترجمه انگلیسی پارسیس در دارالترجمه رسمی انگلیسی قادر است فایل های مقالات ژورنال و آی اس آی شما را از زبان انگلیسی به فارسی و کلیه زبان های تحت پوشش ترجمه نماید
https://parsistrans.com
Mitigation of Power Quality Issues by Nine Switches UPQC Using PI & ANN with ...MABUSUBANI SHAIK
Abstract—A nine-switch power converter having two sets of output terminals was recently proposed in place of the traditional back-to-back power converter that uses 12 switches in total. The nine-switch converter has already been proven to have certain advantages, in addition to its component saving topological feature. Despite these advantages, the nine-switch converter has so far found limited applications due to its many perceived performance tradeoffs like requiring an oversized dc-link capacitor, limited amplitude sharing, and constrained phase shift between its two sets of output terminals. Instead of accepting these tradeoffs as limitations, a nine-switch power conditioner is proposed here that virtually “converts” most of these topological short comings into interesting performance advantages. Aiming further to reduce its switching losses, Harmonics, Voltage Sag & Swell an appropriate discontinuous modulation scheme is proposed and studied here in detail to doubly ensure that maximal reduction of commutations is achieved. With an appropriately designed control scheme with PI and ANN with Hysteresis controller then incorporated, the nine-switch converter is shown to favorably raise the overall power quality in Simulation, hence justifying its role as a power conditioner at a reduced cost.
Index Terms—Discontinuous pulse-width modulation, nine switch converter, power conditioner, power quality.
Cascaded Multilevel Inverter Based Active Power Filters: A Survey of ControlsIOSR Journals
This document summarizes several control strategies for cascaded multilevel inverter based active power filters, including:
1. P-q theory with PI controller, which calculates real and reactive power to generate reference currents but has errors when voltages are distorted.
2. Average power method with carrier phase shifted PWM, which gives accurate results even with distorted voltages by using a PLL and calculating average power.
3. Instantaneous real-power theory with triangular-sampling current modulator, which generates reference currents to compensate for harmonics and reactive power in real-time using simple calculations. It maintains the DC bus voltage and works for generic power systems.
An inclination towards renewable energy resources has been increased due to the requirement of clean environment and to satisfy the increasing power demand for the long run. A grid connected system requires the availability of a transformer in its power conversion stages that provides galvanic isolation between the grid and the power system. But inclusion of transformer results in making the system bulky and more expensive. In this paper different transformer-less PV inverter topologies are analyzed by comparing their efficiency, leakage current and THD of load current using MATLAB/Simulink environment. In order to achieve maximum power, maximum power point tracking (P&O algorithm) is used. From the simulation results, modified HB-ZVR is found to have minimum leakage current and constant common mode voltage with higher efficiency. Also, the hardware results are obtained for modified HB-ZVR topology.
COMPARISON ANALYSIS OF SHUNT ACTIVE FILTER AND TRANSFORMERLESS PARALLEL HYBRI...cscpconf
This research work presents the comparison analysis of Shunt Active Filter (SAF) with Parallel Hybrid Active Filter (PHAF). The performances of SAF and PHAF have been analyzed with PI controllers based on Synchronous Reference Frame theory. In each case, simulation is carried out for three phase unbalanced non liner load conditions. The advantages of the designed system and the proposed current reference calculation methods are verified by simulations using MATLAB Power system Toolbox.
Comparison analysis of shunt active filter and transformerless parallel hybri...csandit
This research work presents the comparison analysis of Shunt Active Filter (SAF) with Parallel
Hybrid Active Filter (PHAF). The performances of SAF and PHAF have been analyzed with PI
controllers based on Synchronous Reference Frame theory. In each case, simulation is carried
out for three phase unbalanced non liner load conditions. The advantages of the designed
system and the proposed current reference calculation methods are verified by simulations
using MATLAB Power system Toolbox.
A Novel Power Factor Correction Rectifier for Enhancing Power QualityIJPEDS-IAES
In this paper, the disturbances in power system due to low quality of power
are discussed and a current injection method to maintain the sinusoidal input
current which will reduce the total current harmonic distortion (THD) as well
as improve the power factor nearer to unity is proposed. The proposed
method makes use of a novel controlled diode rectifier which involves the
use of bidirectional switches across the front-end rectifier and the operation
of the converter is fully analyzed. The main feature of the topology is low
cost, small size, high efficiency and simplicity, and is excellent for
retrofitting front-end rectifier of existing ac drives, UPS etc. A novel strategy
implementing reference compensation current depending on the load
harmonics and a control algorithm for three-phase three-level unity PF
rectifier which draws high quality sinusoidal supply currents and maintains
good dc link- voltage regulation under wide load variation. The proposed
technique can be applied as a retrofit to a variety of existing thyristor
converters which uses three bidirectional switches operating at low frequency
and a half-bridge inverter operating at high frequency .The total power
delivered to the load is processed by the injection network, the proposed
converter offers high efficiency and not only high power factor but also the
Total Harmonic Distortion is reduced. Theoretical analysis is verified by
digital simulation and a hardware proto type module is implemented in order
to confirm the feasibility of the proposed system. This scheme in general is
suitable for the common variable medium-to high-power level DC load
applications.
International Journal of Computational Engineering Research(IJCER) is an intentional online Journal in English monthly publishing journal. This Journal publish original research work that contributes significantly to further the scientific knowledge in engineering and Technology.
Power Quality Improvement using Passive shunt filters, TCR and TSC combinationIJERA Editor
In this thesis Power Quality Improvement is examined using Passive shunt filter, TCR and TSC combination. Today’s electric power systems are connected to many non-linear loads. The characteristics of these non-linear loads inevitably change the sinusoidal nature of the a.c. power current, resulting in the flow of harmonic current in the a.c. power system. Use of shunt passive filters in the reduction of harmonics offers the advantages of more simplicity, high reliability, high efficiency and low cost. The uncontrolled ac-dc converter suffers from operating problems of poor power factor, injection of harmonics into the ac mains, variations in dc link voltage of input ac supply, equipment overheating due to harmonic current absorption, voltage distortion due to the voltage drop caused by harmonic currents flowing through system impedances etc.The combinations of passive filters with TCR and TSC are designed and analyzed to improve the power quality at ac mains. This scheme has resulted in improved power quality with overall reduced rating of passive components used in front end ac-dc converters with R-L load.
The document discusses the components and structure of an electric power system. It describes how power is generated at power stations and stepped up in voltage for transmission over long distances before being stepped down for distribution to consumers. The key components are generators, transformers, transmission lines, control equipment, and distribution systems. Power flows from generation through transmission and distribution before reaching ultimate consumers.
Design and implementation of a series switching SPSI for PV cell to use in ca...journalBEEI
This document describes the design and implementation of a series switching single-phase synchronous inverter (S-PSI) for use with photovoltaic cells in a carrier-based grid synchronous system. A carrier-based grid synchronous controller is designed using pulse width modulation to operate the inverter switches. The inverter is designed to output 230V AC at 50Hz from a 340V DC input. Grid filters are used to convert the output waveform to sinusoidal and reduce harmonics. Simulation and experimental results show the proposed design achieves 97.02% efficiency with a 55% reduction in phase error and 11% reduction in total harmonic distortion.
The third order LLCL filter is gaining more attractive in grid connected PV inverter in terms of material cost saving than LCL filter. Several active and passive damping techniques prevail in mitigating the resonance problem for maintaining the grid power quality standards. In this paper an improved passive damping is examined with reduction of power loss for the LLCL filter. Particularly, it reduces the switching ripple much better than LCL filter, with a decrease in volume of the inductance. The filter design is also developed for the operation of stiff grid. Mathematical operations and transfer function are derived with frequency response for the accuracy of the filter design. In addition, comparative analysis of passive and improved passive damping control is proposed. The control strategy is improved with feedback linearization in order to avoid the glitches in inverter control and is verified with prototype grid connected PV inverter.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
LCL Filter for Grid Connected VSC Converter
Comprehensive analysis and modeling of the three-phase LCL filter for VSC converters, suitable for wind energy or photovoltaic applications.
Enhancement of power quality in distribution system using d statcomvasaharish
1) The document discusses a project to enhance power quality in a distribution system using a D-STATCOM. It describes common power quality problems like voltage sags, harmonic distortion, and low power factor.
2) It provides details on the components and operation of a D-STATCOM, which contains a voltage source converter, controller, energy storage circuit, and LCL passive filter.
3) The methodology section describes simulating different fault scenarios in a test system both with and without a D-STATCOM and with or without the LCL filter. The results demonstrate that a D-STATCOM can mitigate voltage sags and an LCL filter reduces harmonic distortion.
This document provides information about MSR Projects, an organization that offers PLC and MATLAB training as well as IEEE and live projects for B.Tech and M.Tech students. It lists over 30 M.Tech power systems projects related to improving power quality, solar power generation, and wind power generation. It also provides contact information for MSR Projects, including their address in Hyderabad, email, websites, and phone number.
A fault-tolerant photovoltaic integrated shunt active power filter with a 27-...IJECEIAES
This paper introduces a fault-tolerant shunt active power filter (SAPF). The novility in of this work is that it poposes a solutions to increase the reliability of shunt active power filter to maintain its operation under a single-phase open-circuit fault in the SAPF. This will increase the reliability of the whole power system. The SAPF is composed of a 4-leg 27-level inverter based on asymmetric cascaded H-bridge topology. If an open-circuit fault is introduced to the operation of the SAPF, a special control technique will be implemented and the redundant leg of the SAPF will be activated. The faulttolerant SAPF can do many tasks under healthy operating conditions and post and open circuit fault depending on the state of charge (SOC) of the batteries. It can mitigate harmonics in the power system, improve power factor in the system by injecting reactive power, and inject real power to the system. The proposed SAPF is tested and simulated in MATLAB/Simulink and the results have shown a significant improvement in total harmonics distortion (THD) of the source current from 13.9% to 3.9% under the normal operating condition and from 42% to 8.4% post and open circuit fault.
Power optimization using six phase transmission systems provides several benefits over traditional three phase systems. A six phase system can transfer up to 73% more power than a three phase double circuit line using the same transmission right-of-way. Six phase systems have lower line voltages for the same power transfer, reducing electric field, radio noise, audible noise, and corona losses. While six phase end equipment such as transformers and circuit breakers are more expensive, the reduced line costs result in similar total costs compared to upgraded three phase systems. Studies have shown six phase systems to have better reliability, voltage regulation, stability, and current balance.
Research Inventy : International Journal of Engineering and Scienceresearchinventy
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
presentation of Conference On Electrical And Electronic Engineering 2015sager alswed
The designed three phase SAPF based on instantaneous p-q theory was simulated in MATLAB /SIMULINK by using different load conditions i.e. R-L load, suddenly connected R-L load, and additional unbalance R load. Its application was successfully proved and the validity achieved by minimizing the harmonics and improving PF as summarized in Table 2. Consequently, the supply current is almost pure sinusoidal. THD observed was fund to be within the prescribed limits of 5% as recommended by IEEE-519 standard.
ترجمه مقاله انگلیسی
ترجمه مقاله ژورنال ساینس دایرکت در دارالترجمه انگلیسی پارسیس
دپارتمان ترجمه انگلیسی پارسیس در دارالترجمه رسمی انگلیسی قادر است فایل های مقالات ژورنال و آی اس آی شما را از زبان انگلیسی به فارسی و کلیه زبان های تحت پوشش ترجمه نماید
https://parsistrans.com
Mitigation of Power Quality Issues by Nine Switches UPQC Using PI & ANN with ...MABUSUBANI SHAIK
Abstract—A nine-switch power converter having two sets of output terminals was recently proposed in place of the traditional back-to-back power converter that uses 12 switches in total. The nine-switch converter has already been proven to have certain advantages, in addition to its component saving topological feature. Despite these advantages, the nine-switch converter has so far found limited applications due to its many perceived performance tradeoffs like requiring an oversized dc-link capacitor, limited amplitude sharing, and constrained phase shift between its two sets of output terminals. Instead of accepting these tradeoffs as limitations, a nine-switch power conditioner is proposed here that virtually “converts” most of these topological short comings into interesting performance advantages. Aiming further to reduce its switching losses, Harmonics, Voltage Sag & Swell an appropriate discontinuous modulation scheme is proposed and studied here in detail to doubly ensure that maximal reduction of commutations is achieved. With an appropriately designed control scheme with PI and ANN with Hysteresis controller then incorporated, the nine-switch converter is shown to favorably raise the overall power quality in Simulation, hence justifying its role as a power conditioner at a reduced cost.
Index Terms—Discontinuous pulse-width modulation, nine switch converter, power conditioner, power quality.
Cascaded Multilevel Inverter Based Active Power Filters: A Survey of ControlsIOSR Journals
This document summarizes several control strategies for cascaded multilevel inverter based active power filters, including:
1. P-q theory with PI controller, which calculates real and reactive power to generate reference currents but has errors when voltages are distorted.
2. Average power method with carrier phase shifted PWM, which gives accurate results even with distorted voltages by using a PLL and calculating average power.
3. Instantaneous real-power theory with triangular-sampling current modulator, which generates reference currents to compensate for harmonics and reactive power in real-time using simple calculations. It maintains the DC bus voltage and works for generic power systems.
An inclination towards renewable energy resources has been increased due to the requirement of clean environment and to satisfy the increasing power demand for the long run. A grid connected system requires the availability of a transformer in its power conversion stages that provides galvanic isolation between the grid and the power system. But inclusion of transformer results in making the system bulky and more expensive. In this paper different transformer-less PV inverter topologies are analyzed by comparing their efficiency, leakage current and THD of load current using MATLAB/Simulink environment. In order to achieve maximum power, maximum power point tracking (P&O algorithm) is used. From the simulation results, modified HB-ZVR is found to have minimum leakage current and constant common mode voltage with higher efficiency. Also, the hardware results are obtained for modified HB-ZVR topology.
COMPARISON ANALYSIS OF SHUNT ACTIVE FILTER AND TRANSFORMERLESS PARALLEL HYBRI...cscpconf
This research work presents the comparison analysis of Shunt Active Filter (SAF) with Parallel Hybrid Active Filter (PHAF). The performances of SAF and PHAF have been analyzed with PI controllers based on Synchronous Reference Frame theory. In each case, simulation is carried out for three phase unbalanced non liner load conditions. The advantages of the designed system and the proposed current reference calculation methods are verified by simulations using MATLAB Power system Toolbox.
Comparison analysis of shunt active filter and transformerless parallel hybri...csandit
This research work presents the comparison analysis of Shunt Active Filter (SAF) with Parallel
Hybrid Active Filter (PHAF). The performances of SAF and PHAF have been analyzed with PI
controllers based on Synchronous Reference Frame theory. In each case, simulation is carried
out for three phase unbalanced non liner load conditions. The advantages of the designed
system and the proposed current reference calculation methods are verified by simulations
using MATLAB Power system Toolbox.
A Novel Power Factor Correction Rectifier for Enhancing Power QualityIJPEDS-IAES
In this paper, the disturbances in power system due to low quality of power
are discussed and a current injection method to maintain the sinusoidal input
current which will reduce the total current harmonic distortion (THD) as well
as improve the power factor nearer to unity is proposed. The proposed
method makes use of a novel controlled diode rectifier which involves the
use of bidirectional switches across the front-end rectifier and the operation
of the converter is fully analyzed. The main feature of the topology is low
cost, small size, high efficiency and simplicity, and is excellent for
retrofitting front-end rectifier of existing ac drives, UPS etc. A novel strategy
implementing reference compensation current depending on the load
harmonics and a control algorithm for three-phase three-level unity PF
rectifier which draws high quality sinusoidal supply currents and maintains
good dc link- voltage regulation under wide load variation. The proposed
technique can be applied as a retrofit to a variety of existing thyristor
converters which uses three bidirectional switches operating at low frequency
and a half-bridge inverter operating at high frequency .The total power
delivered to the load is processed by the injection network, the proposed
converter offers high efficiency and not only high power factor but also the
Total Harmonic Distortion is reduced. Theoretical analysis is verified by
digital simulation and a hardware proto type module is implemented in order
to confirm the feasibility of the proposed system. This scheme in general is
suitable for the common variable medium-to high-power level DC load
applications.
International Journal of Computational Engineering Research(IJCER) is an intentional online Journal in English monthly publishing journal. This Journal publish original research work that contributes significantly to further the scientific knowledge in engineering and Technology.
Power Quality Improvement using Passive shunt filters, TCR and TSC combinationIJERA Editor
In this thesis Power Quality Improvement is examined using Passive shunt filter, TCR and TSC combination. Today’s electric power systems are connected to many non-linear loads. The characteristics of these non-linear loads inevitably change the sinusoidal nature of the a.c. power current, resulting in the flow of harmonic current in the a.c. power system. Use of shunt passive filters in the reduction of harmonics offers the advantages of more simplicity, high reliability, high efficiency and low cost. The uncontrolled ac-dc converter suffers from operating problems of poor power factor, injection of harmonics into the ac mains, variations in dc link voltage of input ac supply, equipment overheating due to harmonic current absorption, voltage distortion due to the voltage drop caused by harmonic currents flowing through system impedances etc.The combinations of passive filters with TCR and TSC are designed and analyzed to improve the power quality at ac mains. This scheme has resulted in improved power quality with overall reduced rating of passive components used in front end ac-dc converters with R-L load.
The document discusses the components and structure of an electric power system. It describes how power is generated at power stations and stepped up in voltage for transmission over long distances before being stepped down for distribution to consumers. The key components are generators, transformers, transmission lines, control equipment, and distribution systems. Power flows from generation through transmission and distribution before reaching ultimate consumers.
Design and implementation of a series switching SPSI for PV cell to use in ca...journalBEEI
This document describes the design and implementation of a series switching single-phase synchronous inverter (S-PSI) for use with photovoltaic cells in a carrier-based grid synchronous system. A carrier-based grid synchronous controller is designed using pulse width modulation to operate the inverter switches. The inverter is designed to output 230V AC at 50Hz from a 340V DC input. Grid filters are used to convert the output waveform to sinusoidal and reduce harmonics. Simulation and experimental results show the proposed design achieves 97.02% efficiency with a 55% reduction in phase error and 11% reduction in total harmonic distortion.
The third order LLCL filter is gaining more attractive in grid connected PV inverter in terms of material cost saving than LCL filter. Several active and passive damping techniques prevail in mitigating the resonance problem for maintaining the grid power quality standards. In this paper an improved passive damping is examined with reduction of power loss for the LLCL filter. Particularly, it reduces the switching ripple much better than LCL filter, with a decrease in volume of the inductance. The filter design is also developed for the operation of stiff grid. Mathematical operations and transfer function are derived with frequency response for the accuracy of the filter design. In addition, comparative analysis of passive and improved passive damping control is proposed. The control strategy is improved with feedback linearization in order to avoid the glitches in inverter control and is verified with prototype grid connected PV inverter.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
LCL Filter for Grid Connected VSC Converter
Comprehensive analysis and modeling of the three-phase LCL filter for VSC converters, suitable for wind energy or photovoltaic applications.
Enhancement of power quality in distribution system using d statcomvasaharish
1) The document discusses a project to enhance power quality in a distribution system using a D-STATCOM. It describes common power quality problems like voltage sags, harmonic distortion, and low power factor.
2) It provides details on the components and operation of a D-STATCOM, which contains a voltage source converter, controller, energy storage circuit, and LCL passive filter.
3) The methodology section describes simulating different fault scenarios in a test system both with and without a D-STATCOM and with or without the LCL filter. The results demonstrate that a D-STATCOM can mitigate voltage sags and an LCL filter reduces harmonic distortion.
This document provides information about MSR Projects, an organization that offers PLC and MATLAB training as well as IEEE and live projects for B.Tech and M.Tech students. It lists over 30 M.Tech power systems projects related to improving power quality, solar power generation, and wind power generation. It also provides contact information for MSR Projects, including their address in Hyderabad, email, websites, and phone number.
Grid integration of the Wind Turbine GeneratorPhani Kumar
This document discusses wind power integration and provides statistics on wind generation capacity and growth worldwide and in key countries from 1995-2013. It also summarizes state-wise wind installations in India from 2009-2014 and the sources of renewable energy in India as of 2013. The major phases of a wind power project are outlined, including wind resource assessment, access road and power evacuation infrastructure development, construction activities, and commissioning. Classification of wind turbines by mechanical features and generators is also summarized.
Power Grid Corporation of India is a state-owned electric utilities company headquartered in Gurgaon, Delhi. It owns one of the largest transmission networks in the world, transmitting about 50% of India's total power. Power Grid was established in 1989 to integrate power distribution across India. It has over 1 lakh circuit km of transmission lines and 168 substations. Power Grid has been granted Maharatna status, allowing it greater financial autonomy to invest without government approval.
Iaetsd fuzzy logic control of statcom for voltage regulationIaetsd Iaetsd
This document describes a new adaptive PI and fuzzy control method for controlling a STATCOM (static synchronous compensator) to regulate voltage in a power system. A STATCOM is a device that can provide fast reactive power support to maintain power system voltage stability. Previous STATCOM control methods often use PI (proportional-integral) controllers but require extensive tuning to determine optimal control parameters. The new adaptive fuzzy and PI control proposed in this document can self-adjust the PI control gains dynamically in response to disturbances, providing consistent performance under different operating conditions without needing retuning. This gives the STATCOM "plug-and-play" capability. The control method is described and its performance advantages over conventional STATCOM control with fixed PI gains are discussed.
STATCOM can provide fast and efficient reactive power support to maintain power system voltage stability. In the literature, various STATCOM control methods have been discussed including many applications of proportional-integral (PI) controllers. However, these previous works obtain the PI gains via a trial-and-error approach or extensive studies with a tradeoff of performance and applicability. Hence, control parameters for the optimal performance at a given operating point may not be effective at a different operating point. This paper proposes a new control model based on adaptive PI control, which can self-adjust the control gains during a disturbance such that the performance always matches a desired response, regardless of the change of operating condition. Since the adjustment is autonomous, this gives the plug-and-play capability for STATCOM operation. In the simulation test, the adaptive PI control shows consistent excellence under various operating conditions, such as different initial control gains, different load levels, change of transmission network, consecutive disturbances, and a severe disturbance. In contrast, the conventional STATCOM control with tuned, fixed PI gains usually perform fine in the original system, but may not perform as efficient as the proposed control method when there is a change of system conditions.
Design and Analysis of Adaptive Neural Controller for Voltage Source Converte...IDES Editor
Usually a STATCOM is installed to support power
system networks that have a poor power factor and often poor
voltage regulation. It is based on a power electronics voltagesource
converter. Various PWM techniques make selective
harmonic elimination possible, which effectively control the
harmonic content of voltage source converters. The distribution
systems have to supply unbalanced nonlinear loads transferring
oscillations to the DC-side of the converter in a realistic
operating condition. Thus, additional harmonics are modulated
through the STATCOM at the point of common coupling
(PCC). This requires more attention when switching angles are
calculated offline using the optimal PWM technique. This
paper, therefore, presents the artificial neural network model
for defining the switching criterion of the VSC for the
STATCOM in order to reduce the total harmonic distortion
(THD) of the injected line current at the PCC. The model takes
into the account the dc capacitor effect, effects of other possible
varying parameters such as voltage unbalance as well as
network harmonics. A reference is developed for offline
prediction and then implemented with the help of back
propagation technique.
Design & Implementation of Controller Based Buck-Boost Converter for Small Wi...iosrjce
This paper propose to design a controller based buck boost converter for the effective utilization of
the wind machine. By implementing a controller based Buck-Boost converter, the voltage produced at the lower
wind speeds can also be utilized effectively by boosting it to the rated charging voltage of the battery. Also if the
wind speed is high, the DC output voltage will increase then the converter bucks this high voltage to the
nominal battery charging voltage (48V), thereby protecting the battery from over charging voltage. Thus the
effective utilization of the wind machine has been achieved by the use of the proposed controller based buck
boost converter.
Ieee 2014 2015 matlab power system projects titles list globalsoft technologiesIEEEJAVAPROJECTS
To Get any Project for CSE, IT ECE, EEE Contact Me @ 09666155510, 09849539085 or mail us - ieeefinalsemprojects@gmail.com-Visit Our Website: www.globalsofttechnologies.org
This document presents a project on a cell phone oriented robotic vehicle. The objective is to control and operate a robot using SMS commands from a cell phone to overcome limitations of conventional RF control methods, such as limited range. The robot is designed with a microcontroller, motors, chassis and other components. It can be controlled through text messages for functions like forward, backward, left and right motions. The robot has applications in fields like industry, medicine and defense where remote access is needed.
Integrated double buck boost converter for power led lamps using fuzzy logic ...IAEME Publication
This document summarizes a research paper that proposes an integrated double buck-boost converter circuit to drive power LED lamps. The circuit ensures a stable voltage supply and good efficiency for the LED lamp. It consists of two inductors, capacitors, and diodes connected in cascade with a common switch. The input inductor operates in discontinuous conduction mode to achieve high power factor from the power source. Simulation results using PI and fuzzy logic controllers show the circuit provides high input power factor and superior output voltage control.
Investigation of Integrated Rectangular SIW Filter and Rectangular Microstrip...IJASCSE
This paper presents an investigation based on the resonant circuit approach to characterize an integrated microwave filter and antenna from a lumped element prototype. This approach is used to design an integrated filter and antenna to reduce the overall size of the physical dimensions of the RF/microwave front-end subsystem. This study focuses on the integration of a rectangular Substrate Integrated Waveguide (SIW) filter with a rectangular microstrip patch antenna to produce a filtering and radiating element in a single device. The physical layouts of the SIW filter and rectangular microstrip patch antenna based on single- and dual-mode will be developed. To prove the concept, the integrated microwave filter and antenna at a center frequency of 2 GHz is demonstrated and validated through simulation and laboratory experiments. The experimental performance yielded promising results that were in good agreement with the simulated results. This study is beneficial for microwave systems, given that the reduction of the complexity of design and physical dimension as well as cost are important for applications such as base stations and multiplexers in wireless communication systems.
Low-power Innovative techniques for Wearable ComputingOmar Elshal
A presentation i did for the Ubiquitous and Wearable Computing seminar during my senior year in university.
The presentation introduces many research papers on the field then discusses one of them thoroughly.
Centralised hybrid renewable power generation using diso buck boost converter...Naresh K
The DISO-Dual Input Single Output converter combines the two energy sources. The converter is designed considering double input, in which same or different type of two inputs can be used individually or simultaneously.
Pantech provide supports on antenna design projects for final year students.. We guide you to implement both on simulation and hardware design.www.pantech proed.com
Swing, voltage stability and power transfer capability in transmission system...eSAT Journals
Abstract In modern era, the increasing size of the power system, to maximize the use of existing systems and to provide adequate voltage support is an emphasis on finding solutions. This flexibility is needed electricity. Better placed than the Flexible AC Transmission Systems (FACTS) to control the flow of electricity, and to provide voltage support can be effective in turn resulting in less damage. The impact of these tools on line flow and bus voltage profile at random algorithm to determine the optimal number of ratings have been studied by keeping them better . The FACTS devices are expensive cause of that FACTS type, number and location of the FACTS devices is very important, for decide the optimal location and parameters of FACTS devices. FACTS are used in the following purposes: Transmission pricing issues by maximizing social welfare with or without consideration of FACTS’ costs; Better utilization of FACT by maximizing FACTS devices total transferred power; Reactive power or voltage control by minimizing transmission losses, or voltage fluctuation. Increase system’s security under emergency by minimizing transmission lines loadability. Power flow control, a current long transmission line, plays an important role within the energy system. The letter swings, long-distance transmission line voltage and power flow control in unified power flow controller (UPFC) based compensation associated series or shunt FACTS devices are employed. Devices such as the proposed transmission line, between the end of the sending and receiving end to the transmission line is used in places as different. Here also deals with determining the optimum placement of Flexible AC Transmission Systems (FACTS) damping out swings, voltage and improves power transfer devices for a long transmission line. Here the concept of compensation mid-point of facts is presented for optimal placement. Keywords: Stability, first swings, rotor angle, power transfer, Flexible AC Transmission Systems (FACTS), Unified Power Flow Controller (UPFC), reactive power
integration of solar and wind power generation systempranavi kasina
The major disadvantages of using independent renewable energy resources are that unavailability of power for all time. For overcoming this we use solar and wind energy together.
PPT POWER GRID CORPORATION OF INDIA LIMITED Aditya Shankar
Power Grid Corporation of India Ltd (POWERGRID) is the central transmission utility of India and has been incorporated since 1989. It is the first ISO 9001 certified power transmission utility in India and wheels over 51% of total power generated in India. POWERGRID has consistently received excellent ratings since 1993-1994 and has been profitable since inception, receiving an AAA credit rating. Its key responsibilities include planning and coordinating the inter-state transmission system, facilitating private sector participation in transmission, and efficiently operating and maintaining the transmission system.
High gain dc dc converter with load regulationeSAT Journals
Abstract High gain dc-dc converters are gaining importance due to the latest trends in extracting power from renewable energies. The most commonly available renewable energy resources are wind and solar. The voltage developed while tapping energy from these sources are very low. Often the load requires larger than the voltage developed by the renewable sources which necessitates a high gain DC-DC converter with moderate duty ratio. Conventional boost converter cannot achieve ultra high voltage gain at moderate duty ratio. The aim of designing engineers is to obtain converters with high gain with moderate duty ratio, reduced switch stress, and cost. Here a single switch non isolated dc-dc converter with capacitor-diode voltage multiplier topology is presented. A 30W prototype of the converter is designed and closed loop simulation is conducted to explain the effectiveness of the controller at different load condition to obtain regulated output. Keywords: — Boost Converter, Single Switch Converter, PI-controller, Voltage Regulation.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
IRJET-Study of Three State Switching Cell Based DC-To-DC ConverterIRJET Journal
This document presents a study of a three-state switching cell based DC-to-DC converter. It describes the system configuration including a voltage multiplier and three-state switching cell incorporated into a buck-boost DC-DC converter topology. MATLAB/Simulink simulation and experimental testing of a prototype 1kW converter is performed. Simulation and experimental results demonstrating boost and buck operation with input voltages of 40V and 80V regulating the output to 134V are presented and discussed. The converter achieves high voltage gain with reduced component sizes and voltage stresses on the switches.
IRJET- Optimal Control of Multilevel Inverter to Minimize Harmonic Distortion...IRJET Journal
This document summarizes research on using multilevel inverters to minimize harmonic distortion from photovoltaic power generation arrays. It discusses 2-level, 3-level, 5-level and 7-level inverters and compares their performance. Selective harmonic elimination is also covered as a control strategy to reduce harmonic content by pre-determining switching angles. The document aims to show that multilevel inverters can help integrate renewable energy sources onto the grid more efficiently with lower voltage and current stresses on semiconductor switches.
Control of inverters to support bidirectional power flow in grid connected sy...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Performance of Maximum Power Point Tracking Algorithm based Photovoltaic Arra...IRJET Journal
This document summarizes a research paper that models and simulates a hybrid microgrid system interconnected with a photovoltaic array and utility grid. It uses a DC-DC boost converter controlled by an incremental conductance maximum power point tracking algorithm connected to the photovoltaic panels. A three-phase three-level inverter with IGBT switches is used to convert the DC power to AC power that is synchronized to the utility grid using a phase locked loop control algorithm. The system is simulated under varying sunlight conditions and the desired results are obtained, demonstrating effective maximum power point tracking and grid integration of solar power.
Incremental Conductance MPPT Algorithm for PV System Implemented Using DC-DC ...IJERA Editor
This document discusses implementing an incremental conductance maximum power point tracking (MPPT) algorithm for a photovoltaic (PV) system using DC-DC buck and boost converters. It provides mathematical models and analysis of the buck and boost converters. The incremental conductance MPPT algorithm is based on matching the source impedance of the PV panel to the load impedance to extract maximum power. The document compares implementing this algorithm with a buck versus boost converter for transferring power from the PV panel to the load.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Modeling and Analysis of a Maximum Power Point Tracking Control for Double St...IRJET Journal
This document presents a mathematical model and analysis of a maximum power point tracking (MPPT) control scheme for a double-stage solar photovoltaic system connected to the power grid. It derives the mathematical model for a boost converter used to increase the voltage from the solar panels and sizes the inductor and capacitor values. It then introduces, models, and compares three MPPT techniques - perturb and observe, incremental conductance, and fuzzy logic control - using MATLAB/Simulink software to optimize the efficiency of extracting power from the solar panels. The goal is to track the maximum power point without oscillations and properly design the passive components of the boost converter to operate in continuous conduction mode and extract maximum power over a range of weather conditions
Design and Simulation of DC-DC ConvertersIRJET Journal
This document discusses the design and simulation of DC-DC converters. It provides theoretical background on buck, boost, and buck-boost converter topologies. The key aspects covered include:
- Deriving the performance parameter equations for buck, boost, and buck-boost converters.
- Explaining the operating principles of each converter topology through equivalent circuit diagrams and voltage/current waveforms.
- Describing an example design and simulation of the three converter types in Orcad software to observe how output voltage changes with varying input parameters like inductance and switching frequency.
The document aims to provide an understanding of these converter topologies and their equations to facilitate the design of buck, boost, or buck-
Design of integrated multistage dc dc convrtereSAT Journals
Abstract Due to the functionality increase of modern battery powered portable devices, the battery life is an important issue. To extend the battery life, an efficient voltage regulator (VR) is required. In this paper discusses the employment of two-stage architecture on the design of point-of-load (POL) Dc- Dc converters. At first, the paper discusses the benefits of an integrated two-stage step-down converter with example to clarify the benefits of the design over one-stage approach. The results of two-stage converter are to be compared with the one-stage approach in addition to size and cost reduction. Then, the benefits of replacing boost converters by integrated two-stage step-up converters are discussed followed by a design example for two-stage step-up converter. The circuits are to be simulated and compared with the help of MATLAB/SIMULINK. Keywords: voltage regulator (VR), point-of-load (POL), MATLAB/SIMULINK
Non Isolated Bidirectional DC-DC Converter with High Voltage Gainpaperpublications3
Abstract: Dependence of the extracted power of the photovoltaic (PV) and wind energies on environmental specifications and low dynamic response of Fuel cells cause a battery to be required in these systems. In order to charge and discharge the battery, a bidirectional converter is needed. In this paper, a non-isolated bidirectional DC-DC converter is presented. The converter consists of two boost converters to enhance the voltage gain. Four power switches are employed in the converter with their body diodes. Two inductors and a capacitor are also employed as passive components. The input current is divided to the inductor which causes the efficiency to be high and the size of them to become smaller. The voltage gain of the converter is higher than the Conventional Cascaded Bidirectional buck/boost Converter (CCBC) in step-up mode. Besides, the voltage gain in step-down mode is lower than CCBC. Circuit is simulated with 25/250V input voltage and 250/25V DC output voltage is verified. Performance parameters such as voltage stress and output ripples are also analyzed. The efficiency of the converter is more than CCBC while the total stress on active switches are same. The simulation is done in MATLAB R2014a.
Keywords: DC-DC converter, High voltage gain converter, Non-isolated bidirectional converter, Voltage Stress.
Title: Non Isolated Bidirectional DC-DC Converter with High Voltage Gain
Author: Fathima Anooda M P, Prof. Elizabeth Paul, Prof. Honey Susan Eldo
ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Paper Publications
IRJET- Power Quality Improvement in Solar by using Fuzzy Logic ControllerIRJET Journal
This document describes a proposed system for improving power quality in solar photovoltaic systems using a fuzzy logic controller. The system uses a single-phase inverter controlled by a predictive control algorithm to perform maximum power point tracking from the PV array and deliver power to the grid, while also compensating for current harmonics and reactive power from nonlinear loads. A fuzzy logic control method is applied for maximum power point tracking to handle model uncertainties and nonlinearity. The performance of the proposed system is evaluated using MATLAB simulation.
This document proposes a novel three-level neutral-point-clamped (NPC) inverter for grid-tied photovoltaic applications. The proposed inverter can effectively balance the operation of two independent DC sources by solving unbalanced conditions caused by unequal irradiation and temperatures. Compared to traditional two-stage inverters, the proposed NPC inverter reduces voltage requirements, lowers DC-link capacitor ratings, and improves efficiency. It also introduces a new NPC inverter topology called N-3L-SNPC that uses hybrid IGBT-MOSFET modules along with a novel PWM strategy for complete inactive body diode control, lower switching losses, higher switching frequency, and reduced output filtering needs.
IRJET - Study and Simulation of AC/DC Microgrid with Hybrid ConverterIRJET Journal
This document presents a study and simulation of an AC/DC microgrid system with a hybrid converter. The microgrid integrates renewable energy sources like solar and wind with the utility grid to meet increasing energy demands. A boost derived hybrid converter is used that can supply both AC and DC loads from a single DC source. The hybrid converter topology and a microgrid system with solar, wind, battery storage and loads are modeled and simulated in MATLAB/Simulink. Simulation results show the potential of the proposed hybrid system to power an isolated area by meeting its electricity demands. A 25W prototype is also tested to validate the hybrid system operation.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Filter Based Solar Power Generation System with a Seven Level InverterIJMTST Journal
This paper proposes a new solar power generation system, which is composed of a DC/DC power converter and a new seven-level inverter. The DC/DC power converter integrates a DC-DC boost converter and a transformer to convert the output voltage of the solar cell array into two independent voltage sources with multiple relationships. This new seven-level inverter is configured using a capacitor selection circuit and a full-bridge power converter, connected in cascade. The capacitor selection circuit converts the two output voltage sources of DC-DC power converter into a three-level DC voltage and the full- bridge power converter further converts this three- level DC voltage into a seven-level AC voltage. In this way, the proposed solar power generation system generates a sinusoidal output current that is in phase with the utility voltage and is fed into the utility. The salient features of the proposed seven-level inverter are that only six power electronic switches are used and only one power electronic switch is switched at high frequency at any time. A prototype is developed and tested to verify the performance of this proposed solar power generation system.
A Hybrid DC-DC Converter for Standalone ApplicationsIRJET Journal
This document presents a hybrid DC-DC converter for standalone renewable energy systems. The converter combines a solar panel and fuel cell as dual power inputs. It utilizes a bootstrap circuit to maintain the expected output voltage even if one input is unavailable or short circuited. The converter operates in three modes - simultaneous operation of both inputs, individual operation of the fuel cell input via bootstrap charging, and individual operation of the solar input. Simulation results demonstrate the converter regulating the output voltage at 40V during both normal operation and bootstrap operation, with low voltage ripple levels. The proposed topology aims to improve reliability and efficiency for hybrid renewable energy systems.
A novel single phase cascaded h-bridge inverter with new cell configuration a...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Design and Implementation of Photovoltaic Module using Multilevel Inverter an...IRJET Journal
This document describes the design of a photovoltaic solar power system that uses a multilevel cascaded H-bridge inverter and dual-stage boost converter. Solar panels generate DC power that is boosted to a higher voltage by a dual-stage boost converter. This output is then fed to a multilevel inverter which produces an AC voltage with reduced harmonic distortion compared to lower level inverters. The document compares the total harmonic distortion of output waveforms from 3, 5, 7, 9 and 11 level inverters and discusses how distortion decreases as the number of levels increases. It also examines filtering the inverter output with an LPF filter to achieve a sinusoidal waveform suitable for feeding into the power grid.
Similar to Lclr filter design and modelling for harmonic mitigation in interconnected micro grid system (20)
Mechanical properties of hybrid fiber reinforced concrete for pavementseSAT Journals
Abstract
The effect of addition of mono fibers and hybrid fibers on the mechanical properties of concrete mixture is studied in the present
investigation. Steel fibers of 1% and polypropylene fibers 0.036% were added individually to the concrete mixture as mono fibers and
then they were added together to form a hybrid fiber reinforced concrete. Mechanical properties such as compressive, split tensile and
flexural strength were determined. The results show that hybrid fibers improve the compressive strength marginally as compared to
mono fibers. Whereas, hybridization improves split tensile strength and flexural strength noticeably.
Keywords:-Hybridization, mono fibers, steel fiber, polypropylene fiber, Improvement in mechanical properties.
Material management in construction – a case studyeSAT Journals
Abstract
The objective of the present study is to understand about all the problems occurring in the company because of improper application
of material management. In construction project operation, often there is a project cost variance in terms of the material, equipments,
manpower, subcontractor, overhead cost, and general condition. Material is the main component in construction projects. Therefore,
if the material management is not properly managed it will create a project cost variance. Project cost can be controlled by taking
corrective actions towards the cost variance. Therefore a methodology is used to diagnose and evaluate the procurement process
involved in material management and launch a continuous improvement was developed and applied. A thorough study was carried
out along with study of cases, surveys and interviews to professionals involved in this area. As a result, a methodology for diagnosis
and improvement was proposed and tested in selected projects. The results obtained show that the main problem of procurement is
related to schedule delays and lack of specified quality for the project. To prevent this situation it is often necessary to dedicate
important resources like money, personnel, time, etc. To monitor and control the process. A great potential for improvement was
detected if state of the art technologies such as, electronic mail, electronic data interchange (EDI), and analysis were applied to the
procurement process. These helped to eliminate the root causes for many types of problems that were detected.
Managing drought short term strategies in semi arid regions a case studyeSAT Journals
Abstract
Drought management needs multidisciplinary action. Interdisciplinary efforts among the experts in various fields of the droughts
prone areas are helpful to achieve tangible and permanent solution for this recurring problem. The Gulbarga district having the total
area around 16, 240 sq.km, and accounts 8.45 per cent of the Karnataka state area. The district has been situated with latitude 17º 19'
60" North and longitude of 76 º 49' 60" east. The district is situated entirely on the Deccan plateau positioned at a height of 300 to
750 m above MSL. Sub-tropical, semi-arid type is one among the drought prone districts of Karnataka State. The drought
management is very important for a district like Gulbarga. In this paper various short term strategies are discussed to mitigate the
drought condition in the district.
Keywords: Drought, South-West monsoon, Semi-Arid, Rainfall, Strategies etc.
Life cycle cost analysis of overlay for an urban road in bangaloreeSAT Journals
Abstract
Pavements are subjected to severe condition of stresses and weathering effects from the day they are constructed and opened to traffic
mainly due to its fatigue behavior and environmental effects. Therefore, pavement rehabilitation is one of the most important
components of entire road systems. This paper highlights the design of concrete pavement with added mono fibers like polypropylene,
steel and hybrid fibres for a widened portion of existing concrete pavement and various overlay alternatives for an existing
bituminous pavement in an urban road in Bangalore. Along with this, Life cycle cost analyses at these sections are done by Net
Present Value (NPV) method to identify the most feasible option. The results show that though the initial cost of construction of
concrete overlay is high, over a period of time it prove to be better than the bituminous overlay considering the whole life cycle cost.
The economic analysis also indicates that, out of the three fibre options, hybrid reinforced concrete would be economical without
compromising the performance of the pavement.
Keywords: - Fatigue, Life cycle cost analysis, Net Present Value method, Overlay, Rehabilitation
Laboratory studies of dense bituminous mixes ii with reclaimed asphalt materialseSAT Journals
Abstract
The issue of growing demand on our nation’s roadways over that past couple of decades, decreasing budgetary funds, and the need to
provide a safe, efficient, and cost effective roadway system has led to a dramatic increase in the need to rehabilitate our existing
pavements and the issue of building sustainable road infrastructure in India. With these emergency of the mentioned needs and this
are today’s burning issue and has become the purpose of the study.
In the present study, the samples of existing bituminous layer materials were collected from NH-48(Devahalli to Hassan) site.The
mixtures were designed by Marshall Method as per Asphalt institute (MS-II) at 20% and 30% Reclaimed Asphalt Pavement (RAP).
RAP material was blended with virgin aggregate such that all specimens tested for the, Dense Bituminous Macadam-II (DBM-II)
gradation as per Ministry of Roads, Transport, and Highways (MoRT&H) and cost analysis were carried out to know the economics.
Laboratory results and analysis showed the use of recycled materials showed significant variability in Marshall Stability, and the
variability increased with the increase in RAP content. The saving can be realized from utilization of recycled materials as per the
methodology, the reduction in the total cost is 19%, 30%, comparing with the virgin mixes.
Keywords: Reclaimed Asphalt Pavement, Marshall Stability, MS-II, Dense Bituminous Macadam-II
Laboratory investigation of expansive soil stabilized with natural inorganic ...eSAT Journals
This document summarizes a study on stabilizing expansive black cotton soil with the natural inorganic stabilizer RBI-81. Laboratory tests were conducted to evaluate the effect of RBI-81 on the soil's engineering properties. The tests showed that with 2% RBI-81 and 28 days of curing, the unconfined compressive strength increased by around 250% and the CBR value improved by approximately 400% compared to the untreated soil. Overall, the study found that RBI-81 effectively improved the strength properties of the black cotton soil and its suitability as a soil stabilizer was supported.
Influence of reinforcement on the behavior of hollow concrete block masonry p...eSAT Journals
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Reinforced masonry was developed to exploit the strength potential of masonry and to solve its lack of tensile strength. Experimental
and analytical studies have been carried out to investigate the effect of reinforcement on the behavior of hollow concrete block
masonry prisms under compression and to predict ultimate failure compressive strength. In the numerical program, three dimensional
non-linear finite elements (FE) model based on the micro-modeling approach is developed for both unreinforced and reinforced
masonry prisms using ANSYS (14.5). The proposed FE model uses multi-linear stress-strain relationships to model the non-linear
behavior of hollow concrete block, mortar, and grout. Willam-Warnke’s five parameter failure theory has been adopted to model the
failure of masonry materials. The comparison of the numerical and experimental results indicates that the FE models can successfully
capture the highly nonlinear behavior of the physical specimens and accurately predict their strength and failure mechanisms.
Keywords: Structural masonry, Hollow concrete block prism, grout, Compression failure, Finite element method,
Numerical modeling.
Influence of compaction energy on soil stabilized with chemical stabilizereSAT Journals
This document summarizes a study on the influence of compaction energy on soil stabilized with a chemical stabilizer. Laboratory tests were conducted on locally available loamy soil treated with a patented polymer liquid stabilizer and compacted at four different energy levels. The study found that increasing the compaction effort increased the density of both untreated and treated soil, but the rate of increase was lower for stabilized soil. Treating the soil with the stabilizer improved its unconfined compressive strength and resilient modulus, and reduced accumulated plastic strain, with these properties further improved by higher compaction efforts. The stabilized soil exhibited strength and performance benefits compared to the untreated soil.
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The study demonstrate the potentiality of satellite remote sensing technique for the generation of baseline information on forest types
including tree plantation details in Bidar forest division, Karnataka covering an area of 5814.60Sq.Kms. The Total Area of Bidar
forest division is 5814Sq.Kms analysis of the satellite data in the study area reveals that about 84% of the total area is Covered by
crop land, 1.778% of the area is covered by dry deciduous forest, 1.38 % of mixed plantation, which is very threatening to the
environmental stability of the forest, future plantation site has been mapped. With the use of latest Geo-informatics technology proper
and exact condition of the trees can be observed and necessary precautions can be taken for future plantation works in an appropriate
manner
Keywords:-RS, GIS, GPS, Forest Type, Tree Plantation
Factors influencing compressive strength of geopolymer concreteeSAT Journals
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To study effects of several factors on the properties of fly ash based geopolymer concrete on the compressive strength and also the
cost comparison with the normal concrete. The test variables were molarities of sodium hydroxide(NaOH) 8M,14M and 16M, ratio of
NaOH to sodium silicate (Na2SiO3) 1, 1.5, 2 and 2.5, alkaline liquid to fly ash ratio 0.35 and 0.40 and replacement of water in
Na2SiO3 solution by 10%, 20% and 30% were used in the present study. The test results indicated that the highest compressive
strength 54 MPa was observed for 16M of NaOH, ratio of NaOH to Na2SiO3 2.5 and alkaline liquid to fly ash ratio of 0.35. Lowest
compressive strength of 27 MPa was observed for 8M of NaOH, ratio of NaOH to Na2SiO3 is 1 and alkaline liquid to fly ash ratio of
0.40. Alkaline liquid to fly ash ratio of 0.35, water replacement of 10% and 30% for 8 and 16 molarity of NaOH and has resulted in
compressive strength of 36 MPa and 20 MPa respectively. Superplasticiser dosage of 2 % by weight of fly ash has given higher
strength in all cases.
Keywords: compressive strength, alkaline liquid, fly ash
Experimental investigation on circular hollow steel columns in filled with li...eSAT Journals
Abstract
Composite Circular hollow Steel tubes with and without GFRP infill for three different grades of Light weight concrete are tested for
ultimate load capacity and axial shortening , under Cyclic loading. Steel tubes are compared for different lengths, cross sections and
thickness. Specimens were tested separately after adopting Taguchi’s L9 (Latin Squares) Orthogonal array in order to save the initial
experimental cost on number of specimens and experimental duration. Analysis was carried out using ANN (Artificial Neural
Network) technique with the assistance of Mini Tab- a statistical soft tool. Comparison for predicted, experimental & ANN output is
obtained from linear regression plots. From this research study, it can be concluded that *Cross sectional area of steel tube has most
significant effect on ultimate load carrying capacity, *as length of steel tube increased- load carrying capacity decreased & *ANN
modeling predicted acceptable results. Thus ANN tool can be utilized for predicting ultimate load carrying capacity for composite
columns.
Keywords: Light weight concrete, GFRP, Artificial Neural Network, Linear Regression, Back propagation, orthogonal
Array, Latin Squares
Experimental behavior of circular hsscfrc filled steel tubular columns under ...eSAT Journals
This document summarizes an experimental study that tested circular concrete-filled steel tube columns with varying parameters. 45 specimens were tested with different fiber percentages (0-2%), tube diameter-to-wall-thickness ratios (D/t from 15-25), and length-to-diameter (L/d) ratios (from 2.97-7.04). The results found that columns filled with fiber-reinforced concrete exhibited higher stiffness, equal ductility, and enhanced energy absorption compared to those filled with plain concrete. The load carrying capacity increased with fiber content up to 1.5% but not at 2.0%. The analytical predictions of failure load closely matched the experimental values.
Evaluation of punching shear in flat slabseSAT Journals
Abstract
Flat-slab construction has been widely used in construction today because of many advantages that it offers. The basic philosophy in
the design of flat slab is to consider only gravity forces; this method ignores the effect of punching shear due to unbalanced moments
at the slab column junction which is critical. An attempt has been made to generate generalized design sheets which accounts both
punching shear due to gravity loads and unbalanced moments for cases (a) interior column; (b) edge column (bending perpendicular
to shorter edge); (c) edge column (bending parallel to shorter edge); (d) corner column. These design sheets are prepared as per
codal provisions of IS 456-2000. These design sheets will be helpful in calculating the shear reinforcement to be provided at the
critical section which is ignored in many design offices. Apart from its usefulness in evaluating punching shear and the necessary
shear reinforcement, the design sheets developed will enable the designer to fix the depth of flat slab during the initial phase of the
design.
Keywords: Flat slabs, punching shear, unbalanced moment.
Evaluation of performance of intake tower dam for recent earthquake in indiaeSAT Journals
Abstract
Intake towers are typically tall, hollow, reinforced concrete structures and form entrance to reservoir outlet works. A parametric
study on dynamic behavior of circular cylindrical towers can be carried out to study the effect of depth of submergence, wall thickness
and slenderness ratio, and also effect on tower considering dynamic analysis for time history function of different soil condition and
by Goyal and Chopra accounting interaction effects of added hydrodynamic mass of surrounding and inside water in intake tower of
dam
Key words: Hydrodynamic mass, Depth of submergence, Reservoir, Time history analysis,
Evaluation of operational efficiency of urban road network using travel time ...eSAT Journals
This document evaluates the operational efficiency of an urban road network in Tiruchirappalli, India using travel time reliability measures. Traffic volume and travel times were collected using video data from 8-10 AM on various roads. Average travel times, 95th percentile travel times, and buffer time indexes were calculated to assess reliability. Non-motorized vehicles were found to most impact reliability on one road. A relationship between buffer time index and traffic volume was developed. Finally, a travel time model was created and validated based on length, speed, and volume.
Estimation of surface runoff in nallur amanikere watershed using scs cn methodeSAT Journals
Abstract
The development of watershed aims at productive utilization of all the available natural resources in the entire area extending from
ridge line to stream outlet. The per capita availability of land for cultivation has been decreasing over the years. Therefore, water and
the related land resources must be developed, utilized and managed in an integrated and comprehensive manner. Remote sensing and
GIS techniques are being increasingly used for planning, management and development of natural resources. The study area, Nallur
Amanikere watershed geographically lies between 110 38’ and 110 52’ N latitude and 760 30’ and 760 50’ E longitude with an area of
415.68 Sq. km. The thematic layers such as land use/land cover and soil maps were derived from remotely sensed data and overlayed
through ArcGIS software to assign the curve number on polygon wise. The daily rainfall data of six rain gauge stations in and around
the watershed (2001-2011) was used to estimate the daily runoff from the watershed using Soil Conservation Service - Curve Number
(SCS-CN) method. The runoff estimated from the SCS-CN model was then used to know the variation of runoff potential with different
land use/land cover and with different soil conditions.
Keywords: Watershed, Nallur watershed, Surface runoff, Rainfall-Runoff, SCS-CN, Remote Sensing, GIS.
Estimation of morphometric parameters and runoff using rs & gis techniqueseSAT Journals
This document summarizes a study that used remote sensing and GIS techniques to estimate morphometric parameters and runoff for the Yagachi catchment area in India over a 10-year period. Morphometric analysis was conducted to understand the hydrological response at the micro-watershed level. Daily runoff was estimated using the SCS curve number model. The results showed a positive correlation between rainfall and runoff. Land use/land cover changes between 2001-2010 were found to impact estimated runoff amounts. Remote sensing approaches provided an effective means to model runoff for this large, ungauged area.
Effect of variation of plastic hinge length on the results of non linear anal...eSAT Journals
Abstract The nonlinear Static procedure also well known as pushover analysis is method where in monotonically increasing loads are applied to the structure till the structure is unable to resist any further load. It is a popular tool for seismic performance evaluation of existing and new structures. In literature lot of research has been carried out on conventional pushover analysis and after knowing deficiency efforts have been made to improve it. But actual test results to verify the analytically obtained pushover results are rarely available. It has been found that some amount of variation is always expected to exist in seismic demand prediction of pushover analysis. Initial study is carried out by considering user defined hinge properties and default hinge length. Attempt is being made to assess the variation of pushover analysis results by considering user defined hinge properties and various hinge length formulations available in literature and results compared with experimentally obtained results based on test carried out on a G+2 storied RCC framed structure. For the present study two geometric models viz bare frame and rigid frame model is considered and it is found that the results of pushover analysis are very sensitive to geometric model and hinge length adopted. Keywords: Pushover analysis, Base shear, Displacement, hinge length, moment curvature analysis
Effect of use of recycled materials on indirect tensile strength of asphalt c...eSAT Journals
Abstract
Depletion of natural resources and aggregate quarries for the road construction is a serious problem to procure materials. Hence
recycling or reuse of material is beneficial. On emphasizing development in sustainable construction in the present era, recycling of
asphalt pavements is one of the effective and proven rehabilitation processes. For the laboratory investigations reclaimed asphalt
pavement (RAP) from NH-4 and crumb rubber modified binder (CRMB-55) was used. Foundry waste was used as a replacement to
conventional filler. Laboratory tests were conducted on asphalt concrete mixes with 30, 40, 50, and 60 percent replacement with RAP.
These test results were compared with conventional mixes and asphalt concrete mixes with complete binder extracted RAP
aggregates. Mix design was carried out by Marshall Method. The Marshall Tests indicated highest stability values for asphalt
concrete (AC) mixes with 60% RAP. The optimum binder content (OBC) decreased with increased in RAP in AC mixes. The Indirect
Tensile Strength (ITS) for AC mixes with RAP also was found to be higher when compared to conventional AC mixes at 300C.
Keywords: Reclaimed asphalt pavement, Foundry waste, Recycling, Marshall Stability, Indirect tensile strength.
Applications of artificial Intelligence in Mechanical Engineering.pdfAtif Razi
Historically, mechanical engineering has relied heavily on human expertise and empirical methods to solve complex problems. With the introduction of computer-aided design (CAD) and finite element analysis (FEA), the field took its first steps towards digitization. These tools allowed engineers to simulate and analyze mechanical systems with greater accuracy and efficiency. However, the sheer volume of data generated by modern engineering systems and the increasing complexity of these systems have necessitated more advanced analytical tools, paving the way for AI.
AI offers the capability to process vast amounts of data, identify patterns, and make predictions with a level of speed and accuracy unattainable by traditional methods. This has profound implications for mechanical engineering, enabling more efficient design processes, predictive maintenance strategies, and optimized manufacturing operations. AI-driven tools can learn from historical data, adapt to new information, and continuously improve their performance, making them invaluable in tackling the multifaceted challenges of modern mechanical engineering.
Optimizing Gradle Builds - Gradle DPE Tour Berlin 2024Sinan KOZAK
Sinan from the Delivery Hero mobile infrastructure engineering team shares a deep dive into performance acceleration with Gradle build cache optimizations. Sinan shares their journey into solving complex build-cache problems that affect Gradle builds. By understanding the challenges and solutions found in our journey, we aim to demonstrate the possibilities for faster builds. The case study reveals how overlapping outputs and cache misconfigurations led to significant increases in build times, especially as the project scaled up with numerous modules using Paparazzi tests. The journey from diagnosing to defeating cache issues offers invaluable lessons on maintaining cache integrity without sacrificing functionality.
Redefining brain tumor segmentation: a cutting-edge convolutional neural netw...IJECEIAES
Medical image analysis has witnessed significant advancements with deep learning techniques. In the domain of brain tumor segmentation, the ability to
precisely delineate tumor boundaries from magnetic resonance imaging (MRI)
scans holds profound implications for diagnosis. This study presents an ensemble convolutional neural network (CNN) with transfer learning, integrating
the state-of-the-art Deeplabv3+ architecture with the ResNet18 backbone. The
model is rigorously trained and evaluated, exhibiting remarkable performance
metrics, including an impressive global accuracy of 99.286%, a high-class accuracy of 82.191%, a mean intersection over union (IoU) of 79.900%, a weighted
IoU of 98.620%, and a Boundary F1 (BF) score of 83.303%. Notably, a detailed comparative analysis with existing methods showcases the superiority of
our proposed model. These findings underscore the model’s competence in precise brain tumor localization, underscoring its potential to revolutionize medical
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for future exploration and optimization of advanced CNN models in medical
imaging, emphasizing addressing false positives and resource efficiency.
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Rainfall intensity duration frequency curve statistical analysis and modeling...bijceesjournal
Using data from 41 years in Patna’ India’ the study’s goal is to analyze the trends of how often it rains on a weekly, seasonal, and annual basis (1981−2020). First, utilizing the intensity-duration-frequency (IDF) curve and the relationship by statistically analyzing rainfall’ the historical rainfall data set for Patna’ India’ during a 41 year period (1981−2020), was evaluated for its quality. Changes in the hydrologic cycle as a result of increased greenhouse gas emissions are expected to induce variations in the intensity, length, and frequency of precipitation events. One strategy to lessen vulnerability is to quantify probable changes and adapt to them. Techniques such as log-normal, normal, and Gumbel are used (EV-I). Distributions were created with durations of 1, 2, 3, 6, and 24 h and return times of 2, 5, 10, 25, and 100 years. There were also mathematical correlations discovered between rainfall and recurrence interval.
Findings: Based on findings, the Gumbel approach produced the highest intensity values, whereas the other approaches produced values that were close to each other. The data indicates that 461.9 mm of rain fell during the monsoon season’s 301st week. However, it was found that the 29th week had the greatest average rainfall, 92.6 mm. With 952.6 mm on average, the monsoon season saw the highest rainfall. Calculations revealed that the yearly rainfall averaged 1171.1 mm. Using Weibull’s method, the study was subsequently expanded to examine rainfall distribution at different recurrence intervals of 2, 5, 10, and 25 years. Rainfall and recurrence interval mathematical correlations were also developed. Further regression analysis revealed that short wave irrigation, wind direction, wind speed, pressure, relative humidity, and temperature all had a substantial influence on rainfall.
Originality and value: The results of the rainfall IDF curves can provide useful information to policymakers in making appropriate decisions in managing and minimizing floods in the study area.
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Lclr filter design and modelling for harmonic mitigation in interconnected micro grid system
1. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 04 | April-2015, Available @ http://www.ijret.org 706
LCLR FILTER DESIGN AND MODELLING FOR HARMONIC
MITIGATION IN INTERCONNECTED MICRO GRID SYSTEM
D. S. Sargar1
, C. L. Bhattar2
1
P.G. Scholar, Department of Electrical Engineering, Rajarambapu Institute of Technology, Maharashtra, India
2
Assistant Professor, Department of Electrical Engineering, Rajarambapu Institute of Technology, Maharashtra,
India
Abstract
Today many people are attracted towards distribution generation (DG) because of low energy cost power supply, local
generation, highly reliable system, supply with good power quality. Increasing attention and investment in renewable energy that
is DG energy sources give rise to rapid development of high penetration renewable energy sources like solar energy, wind energy,
hydro energy. Out of this most important and best is the solar energy. There are multiple ways to interface PV arrays with the
power grid, but in there is problem of power quality. Today’s important concern of the power system is the power quality in case
of renewable energy sources. The power quality improvement in the interconnected micro grid systems and grid interconnection
with Distribution Generation (DGs) is the challenging task and to overcome the power quality problem passive filters are the best
and cost effective solution. In this paper the LCLR filter is implemented between inverter and grid. The complete system consists
of photovoltaic cell (PV), DC-DC boost converter, DC-AC inverter, LCLR filter and the grid. This paper also consists of complete
MATLAB simulation of PV cell, DC-DC boost converter and inverter with LCLR filter.
Key Words: Renewable energy, PV module, DC-DC boost converter, DGs, LCLR filter, power quality, micro grid
(MG) and THD
--------------------------------------------------------------------***----------------------------------------------------------------------
1. INTRODUCTION
Nowadays the cost of fuel increased due to increasing
demand of fuel and use of it, but the fuels are exhaustible in
nature so in the future they will be completely vanished in
one day. Other reasons are the tremendous increase in
population and global warming. The best solution for to
reduce the fuel cost and reduce unlimited use of fuel and to
save the fuel for future is the use of renewable energy
sources for the generation of electrical energy. Some best
renewable energy sources for generation of electricity are:
(1) Wind energy (2) solar energy (3) Tidal energy (4) Hydro
energy [1]. The distribution generation (DGs) means the use
of renewable energy sources for generation of electricity and
electricity generation is local and own generation. In these
the solar energy and wind energy sources are the very
popular energy sources because of its availability and
suitability. That is in the distribution system electrical
energy is generated using wind mill, solar panel with DC-
DC converter and DC-AC converter i.e. inverter with its
suitable controlling system [1]. The main objectives of use
renewable energy sources are: i) provide low cost energy
with local generation ii) Reduce the cost of conventional
energy sources. iii) Provide good quality power supply. The
power quality is obtained using the various power quality
improvement devices and equipment’s like DSTATCOM
(distribution static compensation), DVR (dynamic voltage
restorer), filters (active and passive), and zigzag
transformers, etc. For the grid interconnection of renewable
energy sources with power grid or micro grid is done using
inductor in past cases [2] and in recently LCL (Inductor (L)-
Capacitor (C)- Inductor (L)) filters are used [2]-[5].
The higher order harmonic attenuation of LCL filter allows
the use of lower order switching frequencies to find the
harmonic limitations and these harmonic constraints are
defined by IEEE standards. IEEE 1233 standard is for power
quality definitions [6]. IEEE 519 standard is for harmonic
control in electrical power system [7]. The higher-order
LCLR filter has been used in place of the traditional single L
i.e. only one inductor in series with line for getting the ripple
free the output currents at output of the inverter which is
formed by using IGBTs or MOSFETs as power electronic
devices. The LCLR filter achieves the higher harmonic
reduction along with simple design, the overall weight and
size of the LCLR filter is reduced due to appropriate design
and modelling. In addition LCLR filter does not produce
very high voltage drop across it. LCLR filters have been
used in between inverters connected with renewable energy
sources with pulse width modulation techniques (PWM) for
inverters.
In this paper detailed description about LCLR filter
modeling, designing procedure is given. The objective of
this paper is to carry out the detailed study about modeling
and designing of LCLR filter for inverter with renewable
energy sources as solar (PV panel). The MATLAB
simulation of PV model with boost converter and full bridge
inverter with LCLR filter is done with MATLAB Simulink
software. The proposed block diagram is shown in fig-1.
2. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 04 | April-2015, Available @ http://www.ijret.org 707
Fig-1: Proposed Block Diagram of Inverter with LCLR Filter
.
2. PV MODULE AND BOOST CONVERTER
2.1 PV Module (Photovoltaic Cell)
PV solar energy is a best, clean, renewable energy with a
long service life and high reliability. But because of its high
cost, energy contribution is not as much of as other energy
sources. It is therefore important to have effective and
flexible models. In the photovoltaic (PV) system the solar
energy is converted into electrical energy using
semiconductor device to generate the charge. Two
parameters are very important in the PV systems that are
temperature (T in ºC) and solar irradiation is nothing but the
light intensity which is in watt per meter square; W/m2
. The
equivalent electrical circuit of PV cell is shown in fig-2,
which consists of semiconductor diode D, series resistance
sR , shunt resistance is shR , current flowing through
diode ( dI ) and scI is short circuit current and I is the
current of PV
Fig -2: PV cell Equivalent Electrical Circuit.
Under the standard conditions solar radiation 1000 W/m2
and temperature 250
C is considered [8].
By applying Kirchhoff’s Current Law (KCL) to circuit
which is given by,
shdph IIII (1)
Now, the shunt current is given by equation
0
.
r
sc
rph
I
I
II (2)
The diode current dI and the diode characteristics is given
by
1. ..
.
st
s
NVn
RIV
sd eII (3)
The shunt current is given by,
p
s
sh
R
RIV
I
.
(4)
The equation of thermal voltage is given by
q
TK
Vt
.
(5)
Where, K is Boltzmann constant, T is temperature and q is
the charge [16].
The output voltage of the PV cell is depends upon the
number cells connected in series with each other. Adding
cells in series will increase the voltage. In the proposed
3. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 04 | April-2015, Available @ http://www.ijret.org 708
system single cell PV gives output voltage 21.07V DC and
by increasing seven series cells then output voltage become
147.49V DC. The PV module model is done in the
MATLAB Simulink Soft wares with considering table-1
parameters. The PV curve and IV curve are shown in fig-3
and fig-4 respectively [17, 18].
Fig -3: IV curve of PV cell
Fig -4: PV curve of PV cell
The single PV cell output voltage output voltage
which is 21.07V DC shown in fig-5 and seven cell PV
output voltage is shown in fig-6 which is near about
147.49V DC.
Fig-5: One PV cell output voltage (21.07V)
Fig -6: Seven PV cell output voltage (147.49V).
2.2 DC-DC Boost Converter
DC-DC Boost converters are used to convert DC non-
uniform voltage from the PV cell to required fixed high
level regulated or uniform DC voltage. In addition the boost
converter boosts the voltage level from low to high. The
boost converter circuit consists of input DC voltage from PV
cell, Inductor (L_boost) for boosting, IGBT with pulse
generator for getting the suitable control output, diode,
capacitor (C_boost) and load resistance R [9]. In this paper
seven PV cells produces 147.49V DC, but using this
147.49V boost converter boost the DC voltage up to 312V
DC. The parameters of DC-DC boost converter are
calculated using following equations-
Fig-7:Simulation model of DC-DC boost converter
(a) Duty Cycle: Duty cycle (D) of the boost converter is
intended by considering converter efficiency (η) 95%, for
the more sensible results of the duty cycle efficiency is
added in duty cycle [10]. Mathematical expression for duty
cycle is given by,
D =
out
in
V
V
× η (6)
(b) Inductor Selection: To finding good inductor value
equation (7) is used, di is the ripple current [11]
outs
inoutin
boost
Vfdi
VVV
L
)(
; mH
Vout
Vin
Idi 2 (7)
(c) Capacitor Selection: To select best capacitor value
equation (8) is used. [11-12]
4. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 04 | April-2015, Available @ http://www.ijret.org 709
dVf
DI
C
s
boost
F (8)
Where,
dV is the ripple voltage
21
dI
D
I
dV
(d) Resistance Selection: The resistance value is
calculating using following equation,
out
out
I
V
R (9)
Fig-8: DC-DC Boost Converter Output Voltage (312V DC)
3. LCLR FILTER MODELLING
A. Per Phase Equivalent Circuit Modelling of LCLR Filter
The per phase equivalent model of LCLR filter is fully
described in case of its modeling and designing. Fig-9
shows the per phase model of LCLR filter. L, C, L and R are
the important parameters, 1L is the inverter side inductor,
2L is the grid side inductor, C is the capacitor and R is the
damping resistance. The capacitor C is connected in series
with resistance R.
Fig-9: Per Phase Model of LCLR Filter
The resistance R is connected to avoid the damping in the
circuit. iV is the inverter side voltage i.e. output voltage of
the inverter, gV is the grid side voltage, iI is the inverter
output current, cI is the current flowing through capacitor
and gI is the grid current.
The three phase model of the LCLR is shown in the fig-10.
Fig-10: Three phase model of LCLR Filter.
Transfer function of LCLR filter i.e. transfer function of
LCLR filter with damping resistance
Fig-11: Per Phase model of LCLR filter for finding TF
By applying Kirchhoff’s Voltage Law to loop1 we get
equation,
0
1
1 IgIiRIgIi
CS
SIiLVi (10)
By applying Kirchhoff’s Voltage Law to loop2 we get
equation,
02
1
)( SIgLIiIg
CS
IiIgRVg (11)
Vg=0 because grid voltage assumed to be ultimate so to
dumping out all harmonic frequencies we set the Vg=0
02 SIgL
CS
Ii
CS
Ig
RIiRIg (12)
0
1
2
1
Ii
CS
RIgSL
CS
R (13)
By some manipulation we get Ii i.e. inverter side current
Ig
RCS
CSLRCS
Ii
1
12 2
(14)
From equation (10)
5. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
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Volume: 04 Issue: 04 | April-2015, Available @ http://www.ijret.org 710
01 RIgRIi
CS
Ig
CS
Ii
SIiLVi (15)
IgR
SC
IiR
SC
SLVi
11
1 (16)
Putting value of Ii from equation (14) in the equation (16)
Ig
CS
RCS
Ig
RCS
RCSCSL
CS
RCSCSL
Vi
1
1
1211 22
(17)
By solving brackets we get,
Ig
CS
RCS
Ig
RCSCS
RCSCSLRCSSCRSRCLCSLSRCLSCLL
Vi
1
1
1221121 22223223242
(18)
By taking denominator as CS
Ig
CS
RCS
Ig
CS
RCSCSLRCSSCRSRCLCSLSRCLSCLL
RCSVi
2
22223223242
1
1221121
1
(19)
Now by cancelling plus and minus terms we get,
1
2121211 23
SLLRCSLLCSLL
Ig
RCSVi
(20)
Now by rearranging terms we get important transfer
function
)21(2121
1
23
LLSLLCRSLCLS
SCR
Vi
Ig
(21)
)21(2121
1
23
LLSLLCRSLCLS
SCR
Vi
Ig
SHLCLR
(22)
B. Frequency Response of LCLR filter
To know the frequency response of the LCLR filter
system essentials to find transfer function of the filter. The
transfer function of the LCLR which is the compensation
characteristics of the filter and given by
i
g
LCLR
V
I
H ,
where gI is the grid current and iV inverter output voltage,
in this case grid side voltage is assumed to be an idyllic
voltage. Equation (23) gives the transfer function of LCLR
with damping resistance. [12]
SLLSLLCRSCLL
CRS
SHLCLR
21
2
21
3
21
1
(23)
The filter parameter values are achieved from filter design
procedure which is shown in table-2. Response of filter is
shown in the Bode plot of LCLR with damping resistance in
fig-12
Fig-12: Bode plots of the LCLR filter showing response of
filter with damping resistance.
The insertion of resistance in series with capacitor
affects the frequency response of the LCLR filter which is
easily observed in the fig-12. Without series resistance very
high gain spikes are present in the magnitude Bode plot.
When series resistance with capacitor inserted in filter then
gain spike in the magnitude plot is almost reduced which
smoothing the overall current response, in addition the series
resistance plays important role in the filter to damp out the
oscillations and its value is very small so very less voltage
drop will occurs.
4. FILTER DESIGN PROCEDURE
A. Methodical Filter Design
Some important characteristics of filters must be considered
in the designing of LCLR filter, such characteristics are: (i)
filter size (ii) filter design (iii) amount of current ripple (iv)
cost of the filter (v) switching attenuation performance of
the filter. In case of the only LCL filter there is chance of
resonance due to the reactive power requirement and
because of this capacitor of filter will interfere with grid
resistance; therefore must add passive component as like
resistor in series with the capacitor. The passive component-
resistance is added in series with capacitor to smooth the
current ripples. The active components can be used to solve
these problems.
The important parameters required for the filter design are:
phV : Phase voltage of inverter output
LLV : Line to line voltage of inverter output
P : Rated active power
DCV : DC voltage from renewable energy sources i.e. input
voltage to the inverter
swf : Switching frequency of the inverter
gf : Grid frequency
g : Grid angular frequency
6. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 04 | April-2015, Available @ http://www.ijret.org 711
resf : Resonance frequency
m : Inverter modulation factor
ak : Desired attenuation constant
Firstly need to find base values of the system so that
filter values is in percentage of base values, the base
capacitance bC and base impedance bZ which are
given by,
P
E
Z n
b
2
(24)
bg
b
Z
C
1
; gg f 2 (25)
In the normal power system, it is supposed that highest
variation of power factor in grid is 5 %, when this value
multiplied by base capacitance value to get capacitance
value i.e. bCC 05.0 . The design factor greater than 5%
can used to compensate the reactance of the filter which is
inductive reactance [13]. The highest ripple of the current at
output of the inverter is given by
sw
DC
L mTm
L
V
I 1
3
2
1
max (26)
swT : Is the switching time of the inverter and m :
modulation factor depends upon which PWM technique
used by the inverter. It is seen that highest peak to peak
current distortion occurs at 5.0m , therefore inductor
maximum current given by
1
max
6 Lf
V
I
sw
DC
L (27)
Where, 1L is the inductor of inverter side. For the maximum
rated current consider 10% ripple in current. Rated
maximum current given by,
maxmax 1.0 IIL (28)
Where
phV
P
I
3
2
max (29)
Therefore 1L is given by,
max
1
6.0 If
V
L
sw
DC
(30)
The LCLR filter minimizes current distortion to very low
level so ripple value will be below 2 %. The relation
between harmonic current of inverter and the grid is given
by,
a
swbi
g
k
xCLrhi
hi
2
111
1
(31)
Where ak is the desired attenuation factor of the inverter
and r is the constant which is ratio of grid side inductor
2L to the inverter side inductor 1L and equation (32)
gives its relation.
12 rLL (32)
Fig-13: Implemented System of Inverter with LCLR filter.
7. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 04 | April-2015, Available @ http://www.ijret.org 712
The scheming for the various values of r any can assess
transfer of filter at specific resonance frequency which
depends on the nominal impedance of the grid. [14]
The value of grid side inductor in terms of desired
attenuation factor is given by,
2
2
2
1
1
sw
a
C
k
L
(33)
The resistance (R) in series with capacitor (C) compensates
the part of ripples in the switching frequency to avoid the
resonance of the LCLR filter. The resonance frequencies in
terms of LCLR filter parameters given in,
CLL
LL
res
21
21
(34)
The range of resonance frequency should satisfy
swresg fff 5.010 (35)
The resistance value should be one third of capacitor
impedance at the resonance frequency [15]. The equation
(36) gives the value of resistance of LCLR filter.
C
R
res3
1
(36)
Table-1: PV Cell Parameters
PARAMETER SYMBOLS VALUE
Temperature T 25+273.15 0
C
Irradiance (p. u.) IrrG 1 W/m2
Nominal Irradiance Ir0 1000 W/m2
Boltzmann Constant K 1.38e-3
Charge q 1.6e-19 C
Emission coefficient n 1.36
Open circuit voltage Voc 21.3 V
Short circuit current Isc 3.8 A
Table-2: DC-DC Boost Converter Parameters
PARAMETERS SYMBOLS VALUE
Duty Cycle D 0.575962
Boost Inductor L_boost 0.0019 H
Boost Capacitor C_boost 0.0044 F
Load Resistance R 16.4211 Ω
Table-3: System Parameters
PARAMETERS SYMBOLS VALUE
Phase Grid Voltage Vg 230V
DC Link Voltage VDC 312V
Nominal Power P 5 KW
Grid Frequency
gf 50 Hz
Switching Frequency
swf 15 KHz
Modulation Factor M 0.05
Attenuation Factor
aK 0.2
Table-4: LCLR Filter Parameters
PARAMETERS SYMBOLS VALUE
Inverter Side Inductor L1 1.9729 mH
Grid Side Inductor L2 0.04495 mH
Capacitor of Filter C 15.043 µF
Damping Resistance R 0.5694 Ω
6. SIMULATION RESULTS AND DISCUSSION
A. Inverter controller and LCLR Filter
The model of Inverter with LCLR is done using MATLAB
in Simulink Power System Tool Box shown in fig.13. The
LCLR filter plays very important role in the Power Quality
Improvement and better interconnection of renewable
energy sources inverter with grid. For the inverter dqo
algorithm is used for the power quality improvement which
reduces THD to very low level. dqoMeans the direct-
quadrature-zero transformation is mathematical
transformation which rotates the reference frame of three
phase systems. The dqo transformation decreases three AC
quantities (phases a, b, c) to two DC quantities so that
simplified calculations can be done with DC quantities.
These are done to simplify the calculations for control of the
any three phase inverters.
B. Inverter Without LCLR Filter
Without LCLR filter inverter output current contains
harmonics. The Fig-14 shows the inverter output voltage
(230V) and fig-15(a), (b) and (c) shows phase a, b and c
currents respectively and fig-16 shows inverter output
current of combined phases a, b and c (0.015A). THD of the
system is very high which is up to 50.38%. In this case
current is much distorted so in the power system it is very
dangerous and harmful. The Fig-17 shows THD analysis of
the current.
Fig-14: Inverter output voltage without LCLR Filter (230V)
8. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 04 | April-2015, Available @ http://www.ijret.org 713
Fig-15(a), 15(b), 15(c): Inverter output Current without
LCLR Filter of phase a, b and c respectively.
Fig-16: Inverter output Current without LCLR Filter of
combined phases a, b and c (0.015A).
Fig-17: THD analysis of Inverter output Current without
LCLR Filter.
C. Inverter With LCLR Filter
With the LCLR filter the THD of the system is reduced to
very low level which improves the power quality.
Fig-18: Inverter output active, reactive power, Voltage and
Current with LCLR Filter.
Fig-18 shows the inverter output voltage (230V), current
(0.6A); these quantities are nearly sinusoidal from the
MATLAB simulation results. Means the total harmonic
distortion percentage is almost reduced. Fig-19 shows the
THD analysis of the current and THD of the system is only
0.94%.
Fig-19: THD analysis of Inverter output current with LCLR
filter
7. CONCLUSIONS
In this paper LCLR filter is designed
systematically with grid connected inverter system. The
inverter is fed by renewable energy sources as PV cell and
generates required DC voltage; these papers also proposes
DC-DC Boost Converter for regulating the voltage of PV
cell and boost the voltage level up to optimal required
voltage for inverter. The very cheap LCLR filter with grid
connected inverter reduces system THD and it is found that
proposed LCLR filter meets THD within prescribed range
which is up to 0.94 % therefore power quality would be
improved as well as grid interconnection of inverters with
renewable energy sources is done bitterly.
9. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 04 | April-2015, Available @ http://www.ijret.org 714
ACKNOWLEDGEMENT
I would like to thank Prof. C. L. Bhattar for his valuable
guidance and support. I also thanks to Prof. A. R. Thorat Sir
HOP and Prof. H.T. Jadhav HOD of Electrical department at
Rajarambapu Institute of Technology, Sakhrale, Islampur
for their guidance.
REFERENCES
[1]. Aleksandr Reznik, Marcelo Godoy Simoes, Ahmed
Al-Durra and S. M. Muyeen, “LCL Filter
Design and Performance Analysis for Grid-
Interconnected Systems,” IEEE Trans. Ind. Appl.,
vol.50, no.2, pp. 1225-1232 Mar/April. 2014
[2]. F. Bouchafaa, D. Beriber, and M. S. Boucherit,
“Modeling and control of a grid connected PV
generation system,” in Proc. 18th MED Conf. Control
Autom., 2010, pp. 315–320
[3]. Singh Bhim, Jayaprakash P, Somayajulu TR, Kothari
DP. “Reduced rating VSC with a zig-zag transformer
for current compensation in a three-phase four wire
distribution system,’’ IEEE Trans Power Deliv 2009;
24 (1): 249.
[4]. Singh Bhim, Jayaprakash P, Kothari DP. “A T-
connected transformer and three leg VSC based
DSTATCOM for power quality improvement,” IEEE
Trans Power Electron 2008; 23 (6):2710–8.
[5]. Zaveri Tejas, Bhalja Bhavesh, Zaveri Naimish.
“Comparison of control strategies for DSTATCOM in
three-phase, four-wire distribution system for power
quality improvement under various source voltage and
load conditions,” Electr. Power Energy Syst 2012; 43:
582–94.
[6]. IEEE 1233 standard for power quality definitions.
[7]. IEEE 519 standard for harmonic control in electrical.
[8]. KHELIF Messa oud, M'RAOUI Abdelhamid, MALEK
Ali. “Simulation optimization and performance
analysis of an analog, easy to implement, perturb and
observe MPPT technique to be used in a 1.5 KW p
photovoltaic system,” Centre de Development des
Energies Renouvelables, CDER, 16340, Algiers,
Algeria.
[9]. Sajib Chakraborty, Saila Ishrat Annie and M. A.
Razzak. “Design of Single-Stage Buck and Boost
Converters for Photovoltaic Inverter Applications,”
3rd Inter. Conf. on Informatics, Electron & Vision
2014.
[10]. http://www.scribd.com/doc/53012897/slva372b/access
ed on July, 2013.
[11]. R. O. Caceres, I. Barbi, “A boost dc-ac converter:
Analysis, design, and experimentation,’’ IEEE Trans.
Power Electron., vol. 14, no. 1, pp. 134--141, 1999
[12]. Ravish R. Singh, “Electrical Networks,” Tata
McGraw-Hill Publication, first edition, 2008.
[13]. V. H. Prasad, “Average current mode control of a
voltage source inverter connected to the grid:
Application to different filter cells,” M.S. thesis, Dept.
Elect. Eng., Virginia Polytech. Inst. State Univ.,
Blacksburg, VA, USA, 1997.
[14]. Y. Tang, S. Member, P. C. Loh, P. Wang, and F. H.
Choo, “Generalized Design of High Performance
Shunt Active Power Filter With Output LCL Filter,”
IEEE Transactions on Industrial Electronics, vol. 59,
no. 3, pp. 1443-1452, 2012.
[15]. S. V. Araújo, A. Engler, B. Sahan, V. U. Kassel, F.
Luiz, and M. Antunes, “LCL filter design for grid-
connected NPC inverters in offshore wind turbines,” in
Proc. 7th Int. Conf. Power Electron., 2007, pp. 1133–
1138.
[16]. M.G. Villalva, J.R. Gazoli, E. Ruppert “Modeling and
Circuit Based Simulation of Photovoltaic Arrays”,
Brazilian Journal of Power Electronics, Vol. 14, No. 1,
pp. 35-45, 2009.
[17]. C. Osorio. Matlab-Simulink models, Math works.
[18]. http://ecee.colorado.edu/~ecen2060/matlab.html.
BIOGRAPHIES
Dhananjay S. Sargar received the
B.E degree in Electrical engineering
from Annasaheb Dange College of
Engineering and Technology Ashta,
Sangli, Maharashtra, India in 2013.
Currently he is pursuing M.Tech in
Electrical (Power System) at
Rajarambapu Institute of Technology,
Sakhrale (Islampur), Maharashtra, India. His area of interest
includes Power quality improvement and Renewable Energy
sources.
Chandrakant L. Bhattar received
the B.E. degree in electrical
engineering from Government College
of Engineering, Karad, India, in 2008,
and the M.Tech. Degree in electrical
power system from Government
College of Engineering, Amravati,
India in 2011 He is currently working
as an Assistant Professor in Electrical Engineering
Department, Rajarambapu Institute of Technology,
Maharashtra, India. His research interests are Power Quality
and Application of Power Electronics in Power System and
Smart Grid.