This document presents a study on using a fuzzy logic controlled D-STATCOM (distributed static compensator) to improve power quality in a power distribution system. A D-STATCOM equipped with an LCL passive filter is modeled and connected in parallel to an 11kV distribution system. Fuzzy logic control is implemented to regulate the D-STATCOM's reactive power injection and compensate for voltage sags and total harmonic distortion. Simulation results show the D-STATCOM improves the voltage profile under different fault conditions and reduces current THD from 43.43% to 0.73% when the LCL filter is used. The paper concludes the D-STATCOM effectively mitigates voltage sags and enhances power quality in the distribution
Power Quality Enhancement in Power Distribution system using Artificial intel...sundar balan
Dynamic voltage Restorer
Artificial intelligence based Dynamic voltage restorer
DVR
Artificial neural network based DVR dynamic voltage restorer
Harmonics voltage harmonics voltage sag voltage swell
Power Quality Enhancement in Power Distribution system using Artificial intelligence based Dynamic Voltage Restorer
Stability Enhancement of Pleiku Power System using a Distribution Static Sync...IJAEMSJORNAL
This paper presents the simulation results of using a static synchronous compensator (D-STATCOM) based on voltage source converter (VSC) to enhance voltage stability and improve the stability of the actual Pleiku Power System. The PI controller based D-STATCOM is applied to stabilize and improve voltage waveforms at load buses in the studied power system under three-phase short circuit fault. Simulation results in a time domain are presented to show effectiveness of using the D-STATCOM for stability and improvement of voltage quality when small disturbances occur, and of enhancing voltage magnitude, mitigating voltage oscillation in transient conditions under a severe disturbance in the power system.
LOW VOLTAGE RIDE - THROUGH CAPABILITY OF WIND FARMSEditor IJMTER
Nowadays wind turbines are generally required to offer ancillary services similar to those
provided by conventional generators. One of the most important services wind turbines must offer is
to stay connected to the grid in fault situations delivering the reactive current specified in the recent
grid codes. In this paper, FACTS solutions for fixed speed wind farms such as DVR (Dynamic
Voltage Restorer) are presented as well as classic control and crowbar solutions for variable speed
wind turbines.
Power Quality Enhancement in Power Distribution system using Artificial intel...sundar balan
Dynamic voltage Restorer
Artificial intelligence based Dynamic voltage restorer
DVR
Artificial neural network based DVR dynamic voltage restorer
Harmonics voltage harmonics voltage sag voltage swell
Power Quality Enhancement in Power Distribution system using Artificial intelligence based Dynamic Voltage Restorer
Stability Enhancement of Pleiku Power System using a Distribution Static Sync...IJAEMSJORNAL
This paper presents the simulation results of using a static synchronous compensator (D-STATCOM) based on voltage source converter (VSC) to enhance voltage stability and improve the stability of the actual Pleiku Power System. The PI controller based D-STATCOM is applied to stabilize and improve voltage waveforms at load buses in the studied power system under three-phase short circuit fault. Simulation results in a time domain are presented to show effectiveness of using the D-STATCOM for stability and improvement of voltage quality when small disturbances occur, and of enhancing voltage magnitude, mitigating voltage oscillation in transient conditions under a severe disturbance in the power system.
LOW VOLTAGE RIDE - THROUGH CAPABILITY OF WIND FARMSEditor IJMTER
Nowadays wind turbines are generally required to offer ancillary services similar to those
provided by conventional generators. One of the most important services wind turbines must offer is
to stay connected to the grid in fault situations delivering the reactive current specified in the recent
grid codes. In this paper, FACTS solutions for fixed speed wind farms such as DVR (Dynamic
Voltage Restorer) are presented as well as classic control and crowbar solutions for variable speed
wind turbines.
Voltage profile Improvement Using Static Synchronous Compensator STATCOMINFOGAIN PUBLICATION
Static synchronous compensator (STATCOM) is a regulating device used in AC transmission systems as a source or a sink of reactive power. The most widely utilization of the STATCOM is in enhancing the voltage stability of the transmission line. A voltage regulator is a FACTs device used to adjust the voltage disturbance by injecting a controllable voltage into the system. This paper implement Nruro-Fuzzy controller to control the STATCOM to improve the voltage profile of the power network. The controller has been simulated for some kinds of disturbances and the results show improvements in voltage profile of the system. The performance of STATCOM with its controller was very close within 98% of the nominal value of the busbar voltage.
Mitigation of Voltage Imbalance in A Two Feeder Distribution System Using IupqcIJMERJOURNAL
ABSTRACT: Proliferation of electronic equipment in commercial and industrial processes has resulted in increasingly sensitive electrical loads to be fed from power distribution system which introduce contamination to voltage and current waveforms at the point of common coupling of industrial loads. The unified power quality conditioner (UPQC) is connected between two different feeders (lines), hence this method of connection of the UPQC is called as Interline UPQC (IUPQC).This paper proposes a new connection for a UPQC to improve the power quality of two feeders in a distribution system. Interline Unified Power Quality Conditioner (IUPQC), specifically aims at the integration of series VSC and Shunt VSC to provide high quality power supply by means of voltage sag/swell compensation, harmonic elimination in a power distribution network, so that improved power quality can be made available at the point of common coupling. The structure, control and capability of the IUPQC are discussed in this paper. The efficiency of the proposed configuration has been verified through simulation using MATLAB/ SIMULINK.
Fuzzy Bang-Bang Control Scheme of USSC for Voltage Sag Mitigation due to Shor...IAES-IJPEDS
Unified series shunt compensator (USSC) has been widely used to mitigate various power quality disturbances in distribution network. The USSC is almost similar to the UPFC, but the only differences are that the UPFC inverters are in shunt series connection and used in transmission systems whereas the USSC inverters are in series-shunt connection and used in distribution systems. USSC, it is possible to compensate a different power quality problem as compared to DSTATCOM and DVR. It is noted that, mitigated load voltage by the DVR is lower than mitigated value obtained by USSC. In other words the USSC can mitigate voltage sag better in compared to DVR and D-STATCOM. Also in case of voltage flicker, unbalance and harmonics elimination it is much effective. Similarly, D-STATCOM is unable to control power flow. It is seen that the proposed USSC can mitigate variety of power quality (PQ) problems. Hence due to multi capability of USSC in power quality improvement, this paper presents the scheme based on fuzzy bang-bang control for USSC. Using Fuzzy Logic Control (FLC) based on bang-bang control; the USSC will contribute to improve voltage sag without deteriorating the effect of the other compensating devices.
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.
Implementation of Fuzzy Controlled Photo Voltaic Fed Dynamic Voltage Restorer...ijfls
Power Quality(PQ) has become an area of concern in the electrical distribution system. Dynamic Voltage
Restorer(DVR) restores load voltage to a nominal balanced sinusoidal voltage, when the source voltage
has harmonic distortions, sag, swell and unbalances. In this paper a Photo Voltaic(PV) fed DVR is
proposed to mitigate PQ problems. The PV system can supply the maximum power to the load at a
particular operating point known as Maximum Power Point (MPP), at which the entire PV system operates
with maximum efficiency. A Fuzzy Controller based MPPT is implemented to generate the optimal voltage
from the photovoltaic system by modulating the duty cycle applied to the boost converter. The DVR is
implemented using a Fuzzy Logic Controller based voltage source inverter with Photovoltaic system. The
test system has been simulated and the efficacy of the proposed PV based Fuzzy controlled DVR is
compared with Proportional Integral (PI) controlled DVR.
DVR with Artificial Intelligent Controller for Voltage Sag MitigationMohamed Khaleeel
This paper concludes that DVR is an effective device to compensate the voltage sag in power distribution systems. In term of DVR applications, although Mamdani-type and Sugeno-type share the same functions and rules, there are some distinctions between them.
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.
A Review of Matrix Converter and Novel Control Method of DC-AC Matrix Converteridescitation
For the past three decades, research work in matrix
converter has increased much. This paper presents a new
topology of DC-AC matrix converter, starting with a brief
historical review of different modulation and control strategies
which was developed recently. The purpose of the Paper is to
generate a multilevel output voltage equal to multilevel
inverter with reduced switches. An important part of the paper
is to design a dedicated DC-AC matrix converter and some
new arrays of bidirectional switches in a single module are
also presented. To find the performance of the module the
entire module is designed with MATLAB simulation and tested
with three phase induction motor.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
International Journal of Engineering Research and Development is an international premier peer reviewed open access engineering and technology journal promoting the discovery, innovation, advancement and dissemination of basic and transitional knowledge in engineering, technology and related disciplines.
We follow "Rigorous Publication" model - means that all articles appear on IJERD after full appraisal, effectiveness, legitimacy and reliability of research content. International Journal of Engineering Research and Development publishes papers online as well as provide hard copy of Journal to authors after publication of paper. It is intended to serve as a forum for researchers, practitioners and developers to exchange ideas and results for the advancement of Engineering & Technology.
International Journal of Engineering Research and Development is an international premier peer reviewed open access engineering and technology journal promoting the discovery, innovation, advancement and dissemination of basic and transitional knowledge in engineering, technology and related disciplines.
We follow "Rigorous Publication" model - means that all articles appear on IJERD after full appraisal, effectiveness, legitimacy and reliability of research content. International Journal of Engineering Research and Development publishes papers online as well as provide hard copy of Journal to authors after publication of paper. It is intended to serve as a forum for researchers, practitioners and developers to exchange ideas and results for the advancement of Engineering & Technology.
Voltage profile Improvement Using Static Synchronous Compensator STATCOMINFOGAIN PUBLICATION
Static synchronous compensator (STATCOM) is a regulating device used in AC transmission systems as a source or a sink of reactive power. The most widely utilization of the STATCOM is in enhancing the voltage stability of the transmission line. A voltage regulator is a FACTs device used to adjust the voltage disturbance by injecting a controllable voltage into the system. This paper implement Nruro-Fuzzy controller to control the STATCOM to improve the voltage profile of the power network. The controller has been simulated for some kinds of disturbances and the results show improvements in voltage profile of the system. The performance of STATCOM with its controller was very close within 98% of the nominal value of the busbar voltage.
Mitigation of Voltage Imbalance in A Two Feeder Distribution System Using IupqcIJMERJOURNAL
ABSTRACT: Proliferation of electronic equipment in commercial and industrial processes has resulted in increasingly sensitive electrical loads to be fed from power distribution system which introduce contamination to voltage and current waveforms at the point of common coupling of industrial loads. The unified power quality conditioner (UPQC) is connected between two different feeders (lines), hence this method of connection of the UPQC is called as Interline UPQC (IUPQC).This paper proposes a new connection for a UPQC to improve the power quality of two feeders in a distribution system. Interline Unified Power Quality Conditioner (IUPQC), specifically aims at the integration of series VSC and Shunt VSC to provide high quality power supply by means of voltage sag/swell compensation, harmonic elimination in a power distribution network, so that improved power quality can be made available at the point of common coupling. The structure, control and capability of the IUPQC are discussed in this paper. The efficiency of the proposed configuration has been verified through simulation using MATLAB/ SIMULINK.
Fuzzy Bang-Bang Control Scheme of USSC for Voltage Sag Mitigation due to Shor...IAES-IJPEDS
Unified series shunt compensator (USSC) has been widely used to mitigate various power quality disturbances in distribution network. The USSC is almost similar to the UPFC, but the only differences are that the UPFC inverters are in shunt series connection and used in transmission systems whereas the USSC inverters are in series-shunt connection and used in distribution systems. USSC, it is possible to compensate a different power quality problem as compared to DSTATCOM and DVR. It is noted that, mitigated load voltage by the DVR is lower than mitigated value obtained by USSC. In other words the USSC can mitigate voltage sag better in compared to DVR and D-STATCOM. Also in case of voltage flicker, unbalance and harmonics elimination it is much effective. Similarly, D-STATCOM is unable to control power flow. It is seen that the proposed USSC can mitigate variety of power quality (PQ) problems. Hence due to multi capability of USSC in power quality improvement, this paper presents the scheme based on fuzzy bang-bang control for USSC. Using Fuzzy Logic Control (FLC) based on bang-bang control; the USSC will contribute to improve voltage sag without deteriorating the effect of the other compensating devices.
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.
Implementation of Fuzzy Controlled Photo Voltaic Fed Dynamic Voltage Restorer...ijfls
Power Quality(PQ) has become an area of concern in the electrical distribution system. Dynamic Voltage
Restorer(DVR) restores load voltage to a nominal balanced sinusoidal voltage, when the source voltage
has harmonic distortions, sag, swell and unbalances. In this paper a Photo Voltaic(PV) fed DVR is
proposed to mitigate PQ problems. The PV system can supply the maximum power to the load at a
particular operating point known as Maximum Power Point (MPP), at which the entire PV system operates
with maximum efficiency. A Fuzzy Controller based MPPT is implemented to generate the optimal voltage
from the photovoltaic system by modulating the duty cycle applied to the boost converter. The DVR is
implemented using a Fuzzy Logic Controller based voltage source inverter with Photovoltaic system. The
test system has been simulated and the efficacy of the proposed PV based Fuzzy controlled DVR is
compared with Proportional Integral (PI) controlled DVR.
DVR with Artificial Intelligent Controller for Voltage Sag MitigationMohamed Khaleeel
This paper concludes that DVR is an effective device to compensate the voltage sag in power distribution systems. In term of DVR applications, although Mamdani-type and Sugeno-type share the same functions and rules, there are some distinctions between them.
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.
A Review of Matrix Converter and Novel Control Method of DC-AC Matrix Converteridescitation
For the past three decades, research work in matrix
converter has increased much. This paper presents a new
topology of DC-AC matrix converter, starting with a brief
historical review of different modulation and control strategies
which was developed recently. The purpose of the Paper is to
generate a multilevel output voltage equal to multilevel
inverter with reduced switches. An important part of the paper
is to design a dedicated DC-AC matrix converter and some
new arrays of bidirectional switches in a single module are
also presented. To find the performance of the module the
entire module is designed with MATLAB simulation and tested
with three phase induction motor.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
International Journal of Engineering Research and Development is an international premier peer reviewed open access engineering and technology journal promoting the discovery, innovation, advancement and dissemination of basic and transitional knowledge in engineering, technology and related disciplines.
We follow "Rigorous Publication" model - means that all articles appear on IJERD after full appraisal, effectiveness, legitimacy and reliability of research content. International Journal of Engineering Research and Development publishes papers online as well as provide hard copy of Journal to authors after publication of paper. It is intended to serve as a forum for researchers, practitioners and developers to exchange ideas and results for the advancement of Engineering & Technology.
International Journal of Engineering Research and Development is an international premier peer reviewed open access engineering and technology journal promoting the discovery, innovation, advancement and dissemination of basic and transitional knowledge in engineering, technology and related disciplines.
We follow "Rigorous Publication" model - means that all articles appear on IJERD after full appraisal, effectiveness, legitimacy and reliability of research content. International Journal of Engineering Research and Development publishes papers online as well as provide hard copy of Journal to authors after publication of paper. It is intended to serve as a forum for researchers, practitioners and developers to exchange ideas and results for the advancement of Engineering & Technology.
Mitigation of Fault in the Distribution System by using Flexible Distributed ...IJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
International Journal of Modern Engineering Research (IJMER) covers all the fields of engineering and science: Electrical Engineering, Mechanical Engineering, Civil Engineering, Chemical Engineering, Computer Engineering, Agricultural Engineering, Aerospace Engineering, Thermodynamics, Structural Engineering, Control Engineering, Robotics, Mechatronics, Fluid Mechanics, Nanotechnology, Simulators, Web-based Learning, Remote Laboratories, Engineering Design Methods, Education Research, Students' Satisfaction and Motivation, Global Projects, and Assessment…. And many more.
Voltage profile Improvement Using Static Synchronous Compensator STATCOMINFOGAIN PUBLICATION
Static synchronous compensator (STATCOM) is a regulating device used in AC transmission systems as a source or a sink of reactive power. The most widely utilization of the STATCOM is in enhancing the voltage stability of the transmission line. A voltage regulator is a FACTs device used to adjust the voltage disturbance by injecting a controllable voltage into the system. This paper implement Nruro-Fuzzy controller to control the STATCOM to improve the voltage profile of the power network. The controller has been simulated for some kinds of disturbances and the results show improvements in voltage profile of the system. The performance of STATCOM with its controller was very close within 98% of the nominal value of the busbar voltage.
Simulation and Analysis of a D-STATCOM for Load Compensation and Power Facto...IJMER
Power Generation and Transmission is a complex process, requiring the working of many
components of the power system in tandem to maximize the output. One of the main components to form
a major part is the reactive power in the system. It is required to maintain the voltage to deliver the
active power through the lines. Loads like motor loads and other loads require reactive power for their
operation. To improve the performance of ac power systems, we need to manage this reactive power in
an efficient way and this is known as reactive power compensation. In developing countries like India,
where the variation of power frequency and many such other determinants of power quality are
themselves a serious question, it is very vital to take positive steps in this direction.
The work presented here illustrates a method to compensate for the load reactive power using a
DSTATCOM
A DSTATCOM injects a current into the system to provide for the reactive component of the load
current. The validity of proposed method and achievement of desired compensation are confirmed by
the results of the simulation in MATLAB/ Simulink.
Simulation and Comparison of DVR and DSTATCOM Used for voltage sag mitigation...paperpublications3
Abstract: Power Quality problem in a system leads to various disturbances such as voltage fluctuations, transients and waveform distortions that results in a mis-operation or a failure of end user equipment. There are different types of custom power devices like Distribution Static Compensator (D-STATCOM) and Dynamic Voltage Restorer (DVR) which can effectively use for mitigation of different type of power quality problems. This paper describes the technique of correcting the supply voltage sag distributed system and also describes performance comparison are presented between DVR and DSTATCOM to know how both the devices successfully been applied to power system for regulating system voltage effectively. DSTATCOM and DVR both of them based on VSI principle. A DVR is a series compensation device which injects a voltage in series with system and a DSTATCOM is a shunt compensation device which injects a current into the system to correct the power quality problems. This paper presents a power system operation with PI controller with abc to dq0 convertor approach. Total Harmonics Distortion (THD) is also calculated for the system with and without compensation. Results are presented to assess the performance of devices as a potential custom power solution. Improve dynamic voltage control and thus increase system load ability. This paper presents modeling and simulation of DVR & DSTATCOM in MATLAB/Simulink.
1.compensation of reactive power using d statcom in grid interfaced pv systemEditorJST
This paper displays the upgrade of voltage droops, Harmonic mutilation and low power figure utilizing Distribution Static Compensator (D-STATCOM) with LCL Passive Filter in Distribution Framework. At whatever point there is an entrance of photovoltaic cell energy to the low voltage appropriated matrix, there happen the issue of confuse in voltage and recurrence in the system, maybe brought on by non-direct loads, creating music. The model depends on the Voltage Source Converter (VSC) guideline. The D-STATCOM infuses a current into the framework to alleviate the voltage lists. LCL Passive Filter Was then added to D-STATCOM to enhance symphonies bending and low power figure. The reproductions were performed utilizing MATLAB SIMULINK.
Simulation of D-STATCOM to study Voltage Stability in Distribution systemijsrd.com
This paper presents the simulation of D-statcom to understand the improvement of voltage stability [1] of distribution system. The power circuits of the D-STATCOM and distribution networks are made up of simpower system blocks, while the control circuits made with the simulink blocks The STATCOM is applied to regulate transmission voltage to allow greater power flow in a voltage limited transmission network, in the same manner as a static var compensator (SVC), the STATCOM has further potential by giving an inherently faster response and greater output to a system with depressed voltage and offers improved quality of supply. The main applications of the STATCOM are; Distribution STATCOM (D-STATCOM) exhibits high speed control of reactive power to provide voltage stabilization and other type of system control. The DSTATCOM protects the utility transmission or distribution system from voltage sag and /or flicker caused by rapidly varying reactive current demand. During the transient conditions the D-STATCOM provides leading or lagging reactive power to active system stability, power factor correction and load balancing.
A Review on Optimization Techniques for Power Quality Improvement using DSTAT...ijtsrd
As demand for electricity has risen exponentially, power production and transmission are affected by scarce energy, environmental constraints and other losses. Soft computing methods to fix the sag, swell and disruption of the supply voltage in the distributed device. At present, a broad variety of highly versatile controls that leverage on newly available power electronics components are evolving for custom power applications. Control electronic equipment intended to improve the stability and efficiency of electricity flows in low voltage distribution networks. The control algorithm is used to derive the fundamental weighted value of the active and reactive power components. Using a digital signal processor, DSTATCOM is built and its output as a DSTATCOM is found to be satisfactory for different types of loads. Amit Radhakrishna Parhad | Pramod Kumar Rathore "A Review on Optimization Techniques for Power Quality Improvement using DSTATCOM (Neural Network Approach)" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-4 , June 2021, URL: https://www.ijtsrd.compapers/ijtsrd42403.pdf Paper URL: https://www.ijtsrd.comengineering/electrical-engineering/42403/a-review-on-optimization-techniques-for-power-quality-improvement-using-dstatcom-neural-network-approach/amit-radhakrishna-parhad
Improving Stability of Utility-Tied Wind Generators using Dynamic Voltage Res...IJMTST Journal
The generation of electricity using wind power is significantly increasing and has received considerable attention in recent years. One important problem with the induction generator based wind farms is that they are vulnerable to voltage disturbances and short circuit faults. Any such disturbance may cause wind farm outages. Since wind power contribution is in considerable percentage, such outages may lead to power system stability issues and also violate the grid code requirements. Thus, improving the reliability of wind farms is essential to maintain the stability of the system. The proposed strategy is to use Dynamic Voltage Restorer (DVR), which is one of the promising devices to compensate the voltage disturbance and to improve the stability of the system. It provides the wind generator with the fault ride through capability and improves the reliability of the system. Fuzzy Logic controller is used as a controller in order to control the dc link voltages and to reduce the harmonics. Simulation results for a 2 MW wind turbine are presented, especially for asymmetrical grid faults. They show the effectiveness of the DVR in comparison to the low voltage ride-through of the DFIG using a crowbar that does not allow continuous reactive power production. Extensive simulation results are included to illustrate the operation of DVR and fault compensation.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
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Power Quality Enhancement in Power Distribution System by Using Fuzzy Logic Controlled D-STATCOM
1. International Journal of Emerging Technology and Advanced Engineering
Website: www.ijetae.com (ISSN 2250-2459, ISO 9001:2008 Certified Journal, Volume 6, Issue 3, March 2016)
85
Power Quality Enhancement in Power Distribution System by
Using Fuzzy Logic Controlled D-STATCOM
Jitendra Kumarˡ, Dr. S. K. Srivastava²
1
PG Scholar, 2
Associate Professor, Department of Electrical Engineering, MMMUT Gorakhpur, India 273010
Abstract-This Paper distinguished the problems related
to distribution system in terms of clean power and their
solutions, in the particular of compensation of reactive
power. The abnormalities has been modelled and then
analyzed. The deviations in the distributions system
analyzed by the using D-STATCOM in the real time with
the LCL passive filter. Fuzzy logic control scheme is
implemented for the control of D-STATCOM so that it can
make reactive power and THD under control. A
SIMULINK model has been developed for the proposed
system. Simulink results for various operating conditions
has been obtained and analyzed for the merit of proposed
control technique.
Keywords- D-STATCOM, Voltage Sag, FLC, LCL
passive filter, THD
I. INTRODUCTION
In the present scenario power quality become major
concern with the solid state devices, the performance is
very close to the quality of power which is utilized by the
utility centre. Utilities have the greater interest to utilize
the existing power capacities .Power quality issues
manifested to a undesired current or frequency or voltage
that leads to the system in failure conditions or makes a
misoperation at the consumer end. In today’s
industrializations and modernisations of the power sector
contains solid state power electronics devices like as
IGBTs, MOSFETs and PLCs .All these devices is most
affected by the quality of power such as harmonics,
voltage swells/sag. Major power quality problems is
voltage sags that contributes more than eighty percent of
all these power quality issues. Voltage sags is decrease in
rms amplitude value at the power frequency for a time
period of few seconds. Different fault in the power
system creates a voltage sag in the utility system. Fault at
the customers end increases large current in the load
system, resulted in the starting of motor or enerzitation of
transformer. Typically faults like as single phase to
ground or multiple phase with ground leads a very high
current causes a voltage dip over the system impedance
network. Voltage are hazards for the electronics
equipment used by industry like as adjustable speed
drive, robotics, programmable logic controllers. Different
technique have been applied for the reduction or
mitigations of voltage sag. Some conventional process
are using bank of capacitor, implementation of parallel
connected feeders or apply uninterruptible power
supplies.
The power quality are not completely mitigated due to
high cost of new feeders and controlled compensation of
reactive power. A D-STATCOM (distributed static shunt
compensator) are used for the mitigation of voltage sag
as well as voltage stability, voltage flicker reduction.
This paper consists a D-STATCOM with passive LCL
filter and connected to 11kv distribution system in
parallel or in shunted. The D-STATCOM also improve
the power quality like as low power factor and harmonic
distortion. In this paper section I represent introduction of
test system. Section II describes the power quality issues
such as voltage sag/swells. Section III represents
modelling and principle of operation for the test system.
Fuzzy logic control technique, system implementation
and simulation results are discussed in the section IV,V
and VI respectively.
II. VOLTAGE SAG AND SWELL
Voltage sag and swell is mainly caused by the faulty
conditions short circuit, over load situations and on/off of
high capacity motors. Injections of voltage by DVR to
maintain and restore sensitive voltage to it’s normal
operating value, for achieving zero power or minimum
for compensation to the system by selecting an proper
amplitude and angle between phase for a period of half of
cycle to one minute . Voltage sag can happened at any
instant with 10% to 90% of amplitude ranges of voltage.
Voltage swells are defined as opposite of voltage sag i.e
increment of rms value of voltage or current at frequency
of power for a duration of 0.5 cycle to 60 seconds.
Magnitude of voltage swells ranges from 1.1 to 1.8
increment value.IEE519-1992 and IEEE1159-1995
standard are shown in fig 1
Fig-1 IEEE 159-1995 STANDARD For Voltage Sag
2. International Journal of Emerging Technology and Advanced Engineering
Website: www.ijetae.com (ISSN 2250-2459, ISO 9001:2008 Certified Journal, Volume 6, Issue 3, March 2016)
86
Voltage swells are rarely happen phenomenon in
distribution system i.e not much important as voltage
sag/dip.
III. BASIC STRUCTURE AND OPERATING PRINCIPAL
OF D-STATCOM
The D-STATCOM is voltage source converter based
shunt FACTs devices. It have capacity of absorbing or
generating reactive power. The reactive source could be
controlled. D-STATCOM is connected to the distribution
system by coupling transformer to isolate the D-
STATCOM from the distribution system. It’s need the
device to be implemented as close to the most affecting
loads to enhance the compensation in the distribution
system. D-STATCOM injects only reactive power and
plays major role on the weak ac system. D-STATCOM is
composed of voltage source converter, filter and energy
storage devices as shown in fig 2.
A)Coupling Transformer- It’s used to connect the D-
STATCOM to the distribution system. It’s act as a
isolation between D-STATCOM circuit and
distribution system.
Fig 2- Basic Structure of D-STATCOM
B)VSC(Voltage source Converter)- A voltage
converter are composed of switching devices and
storage devices, producing a sinusoidal voltage at
desired instant of frequency, amplitude and angle of
phase. Application of D-STATCOM is injects the
compensating current into the distribution system
on the basis of unbalance or distortion amount.
Generally IGBTs is choosen as a switching devices.
I out = IL-Is = IL-[(V th- VL)/Z th]
C)DC Link Capacitor- The capacitor act as a storage
devices and provide dc link voltage at the standard
value
D)LCL Passive Filter- The configuration of LCL filter
is shown in fig 3.
Fig 3- LCL Passive Filter
Generally high order LCL filter has been used instead
of conventional L-filter for improving the current
waveform getting from VSI [13]. By using LCL filter
obtaining best attenuation as well as cost saving and size
and weight reduction. To model this following equations
are used.
√
⁄
For efficient LCL passive filter
E) Principal of Operation-
The D-STATCOM are placed for the compensation of
reactive power from which they are interconnected. It is
producing 3 phase alternating voltage to a direct source
of voltage. The magnitude of the voltage are controlled
to maintain amount of reactive power to enhance the
system voltage profile. Generally D-STATCOM voltage
(Vsh) injected with phase the bus voltage (Vt). There is
need of injected energy but reactive power to be absorb
or injected by the D-STATCOM system. The
compensation of reactive power is takes place by the
changing the magnitude of out voltage of D-STATCOM.
The basic operating principal of D-STATCOM is
described by fig 4. The output voltage of IGBTs (Vsh) is
maintained in phase to the bus voltage (Vt) and. current
output changes as Vsh [8,9]
If-
I) Vt < Vsh- Ish leads t by 0 . As a consequence
leading reactive power produced by the D-
STATCOM (i.e Capacitive mode)
II) Vt > Vsh- Ish lag t by 0 . As a consequence
lagging reactive power absorb by D-
STATCOM.(i.e Inductive mode)
III) Vt = Vsh –No reactive power exchange to the
active network.
3. International Journal of Emerging Technology and Advanced Engineering
Website: www.ijetae.com (ISSN 2250-2459, ISO 9001:2008 Certified Journal, Volume 6, Issue 3, March 2016)
87
Fig 4- Operating Principal of D-STATCOM
IV. FUZZY LOGIC CONTROLLER SCHEME
The proposed model used fuzzy logic control as a
controller. Mamdani proposed FLC for a system has
number of input and output is only one. It is a
mathematical system dealing along to the probability and
soft computing provides. Fuzzy logic controller mainly
used for controlling of inverter action. It follows “if x and
y then Z” technique for getting solution of control
problem on the place of mathematically approach of the
system. Fig 5 shows the basic structure of FLC
Fig 5- Block Diagram of Control System
A)Estimation of Error- The error is estimated on the
difference among the bus voltage and reference
voltage. The rate of error is time rate of the error.
B)Fuzzification- Fuzzification is a process through
which the crisp quantities are changes into the
fuzzy, so the fuzzification process assign the
membership value of the crisp quantities. Triangle
membership function are used to the input and
output as shown in fig 6.
Fig 6- Membership Function of Input and Output
Error and rate of error are used to the linguistic
variable.
C) Fuzzy Rule Base- The linguistic variables that are
used are POS, POM, POB, NES, NEB, NEM and
ZE. The fuzzy process is based on Mamdani
method in this wok. The set of rules for controller
are shown in table. If then rule is used to describe
the base rule.
Table I
Rule Base of Fuzzy Logic
D) Defuzzification-The output of FLC is converted to
crisp value by using defuzzification process the
.The output of fuzzy can not be used as it is in the
application. So that conversion is must for the
further processing. This is done by defuzzification
method of centre of gravity.
4. International Journal of Emerging Technology and Advanced Engineering
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88
V. MODELLING OF PROPOSED SYSTEM
In this study D-STATCOM is proposed to enhance the
quality of power for the 11 kv distributed network.
System is composed of a feeder that transfer power to
distributed network at 50 Hz. The control strategy of the
system is shown in fig 7.
Fig 7- Flow Chart for Control Strategy
D-STATCOM is placed at the distribution end. The
simulation parameter are shown in Table II.
Table II-
Simulation Parameter
Proposed system are simulated 0n MATLAB 2012a
which is shown in fig
Fig 7-Simulink Model of Test System
VI. SIMULINK RESULT AND DISSCUSION
The test system are implemented for the various fault
conditions such as single line ground, line to line, double
line to ground, at various resistances.
Table III
Simulink Result
Various
Faults
Faults
Resista
-nces
System
Voltage(pu)
Without
DSTATCO
M
System
Voltage(
pu)
With
DSTAT
COM
%
Improve
ment
SLG 0.68 0.829 0.965 16.40
DLG 0.78 0.751 0.978 30.23
LL 0.88 0.817 0.992 21.42
TLG 0.68 0.671 0.935 39.34
The table II shows the simulated results of voltage in
pu for the various conditions. From the above results it is
clear that the voltage profile of the system improved.
TLG is most severe fault condition where the
compensation of sag is more to improve voltage profile.
Fig. 9 and fig. 12 shows system voltage value (pu) for
various fault conditions at various resistances as shown
in table II.
No System Values
01 Inverter IGBT based, 3 arm, 6 Pulse
Carrier Frequency= 1080 Hz
Sample time= 5µ second
02 Three
Phase
Transforme
r
Nominal Power=100 MVA
Frequency=50 Hz
Magnetization Resistance
Rm(pu)=500
Magnetization Induction
Lm(pu)=500
03 Load R=50 Ω
L=300e-3 H
5. International Journal of Emerging Technology and Advanced Engineering
Website: www.ijetae.com (ISSN 2250-2459, ISO 9001:2008 Certified Journal, Volume 6, Issue 3, March 2016)
89
A)System Voltage Wituout D-STATCOM-
Fig 8- Voltage at PCC at SLG
Fig 9- Voltage at PCC at DLG
Fig 10- Voltage at PCC at LL
Fig 11- Voltage at PCC A TLG
B)System voltage with D-STATCOM- Fig 12 to fig 16
shows the voltage of system with D-STATCOM at
various fault and fault resistances. This is shows the
compensation of voltage sag in the power system
and voltage maintain within control.
Fig 12- Voltage at PCC at SLG
Fig 13- Voltage at PCC at DLG
6. International Journal of Emerging Technology and Advanced Engineering
Website: www.ijetae.com (ISSN 2250-2459, ISO 9001:2008 Certified Journal, Volume 6, Issue 3, March 2016)
90
Fig 14- Voltage at PCC at LL
Fig 15- Voltage at PCC at TLG
VII. PERFORMANCE OF D-STATCOM WITH LCL FILTER
Fig 16- THD of Current without Filter
Fig 17- THD of Current with Filter
Fig 16 and fig 17 shows the TOTAL HARMONIC
DISTORTION (THD) for the current of D-STATCOM
without LCL filter /with LCL filter . THD is 43.43%
without filter although when filter is connected it’s
improved to 0.73%.
VIII. CONCLUSION
The result obtained by the simulation represents that
the mitigation is done for voltage sag by implementing
D-STATCOM in the power distribution system. In
addition to the fuzzy logic controller and LCL passive
filter with D-STATCOM, THD is very less and power
factor approximately close to the unity. Thus the power
quality of the power distribution can be improved. D-
STATCOM’s performance can be further improved by
applying intelligent optimization such as ANNs and
genetics algorithm.
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