This document discusses a simulation of a variable duty cycle control for a discontinuous current mode (DCM) boost power factor correction (PFC) converter to achieve high input power factor. It begins with an abstract that describes using a DCM boost PFC converter with variable duty cycle control to improve the power factor to nearly unity over the entire input voltage range. It then provides background on power factor correction converters, standards for harmonics, and the benefits of improving the power factor. The document proposes using variable duty cycle control for a DCM boost PFC converter to achieve high power factor as well as lower output voltage ripple and higher efficiency compared to constant duty cycle control.
Power quality-disturbances and monitoring SeminarSurabhi Vasudev
The document provides an overview of power quality monitoring and automatic power quality disturbance classification. It defines power quality and discusses increased interest in power quality. It describes various power quality disturbances like voltage fluctuations, harmonics, sags, and swells. It then discusses automatic power quality disturbance classifiers which use techniques like segmentation, feature extraction, and classification to identify different disturbance types. Neural networks and expert systems are presented as methods for automatic classification. The document emphasizes the importance of power quality monitoring and classification systems.
Improved Controller for the Dual Topology of the Unified Power Quality Condit...IRJET Journal
This document presents an improved controller for the dual topology unified power quality conditioner (iUPQC) that extends its applicability for power quality compensation and microgrid applications. The iUPQC can provide reactive power support to regulate the voltage at both the load bus and grid-side bus, acting as a static synchronous compensator (STATCOM) on the grid side while also providing typical UPQC functions like mitigating voltage sags/swells at the load side. Simulation results are provided to validate the new functionality of the device.
Adaptive Modified Minimally Switched Hysteresis Controlled Shunt Active Power...idescitation
The main focus of this article is to investigate the
effects of Adaptive control on the switching frequency and
Total Harmonic Distortion of a modified, minimally switched
hysteresis controlled shunt active power filter. Reference
current generation was done using Instantaneous real and
reactive power algorithm. Pulses to the minimally switched
grid interactive inverter in which only two switches are
controlled at a time, had been generated using a modified
hysteresis current controller. Use of Modified Hysteresis
controller results in reducing the switching loses to one-third
but results in increase in current THD than the conventional
hysteresis controller. To overcome this, pulses to the modified
hysteresis controller were generated employing adaptive
control by modifying pulses from a conventional hysteresis
controller. Using adaptive control instantaneous switching
frequency was reduced and maintained nearly constant and
THD was brought to the limits specified by the standards,
thus overcoming the disadvantage of conventional and modified
hysteresis controller which has variable switching frequency.
A comparison of Modified Hysteresis controller with and
without Adaptive control has been made, to show the reduction
in THD. The system was simulated using MATLAB-
SIMULINK.
Low frequency ac transmission for power systems by Aamir SaleemAamir Saleem
Voltage instability is one of the major issue in
HVAC power network operating at 50 Hz frequency due to
limited power transfer capability and distance limit. The stable
operation of power system must be kept within limits to
increase the efficiency of power transmission system. In this
research Low Frequency AC (LFAC) transmission system has
been proposed as a new power transmission technology to
reduce the losses of transmission network and controlling the
reactive power using Flexible AC transmission device. A
LFAC Transmission lines operates at 16.7Hz frequency for
transmission of power from source to load and use two
Frequency converters at source and load side. The normal
operation of power system depends on the reactive power
flowing through the power transmission lines, which can be
adjusted by a flexible AC transmission device; Static
synchronous compensator. LFAC transmission lines with
STATCOM controller improve the Power system voltage
stability under various disturbances and enhance the power
transmission capability as compare to HVAC transmission.
The simulations are done in Matlab Simulink 2017a .The
Output of Matlab Simulink model shows that voltage will
become Stable and reactive power is compensated for best
performance for power system.
Harmonics created by nonlinear loads such as arc furnaces, cycloconverters and motor drives destroys the power quality in the system. They not only affect the working of adjacent loads but also shorten the life of power equipment by creating excessive losses. ‘Shunt Active Power Filter’ is a modern addition to family of compensating devices. It has superior qualities over its contemporaries namely SVCs and STATCOMs. It not only mitigates harmonics within the allowable limits defined by IEEE Std 519-1992, but also compensates unbalancing and reactive power in the system. Consequently, only active power is supplied by the source thus power factor approaches unity. A fully functional Simulink model of Shunt Active Power Filter has been designed based on ‘Instantaneous Power Theory’ or ‘p-q Theory’. The results of simulation comply with all the features described by the theory, justifying employment of SAPF in the industry.
POWER QUALITY IMPROVEMENT AND FAULT RIDE THROUGH OF GRID CONNECTED WIND ENE...Bharadwaj S
This work tries to improve the power quality by compensating reactive power with Active Power Filters and also to analyze Fault Ride Through of Grid connected wind energy conversion systems.
Variable renewable energy sources like solar and wind power are growing rapidly worldwide, with investments in renewable power exceeding those in non-renewable sources in recent years. As the share of variable renewable energy increases in many power systems, grid codes are playing an important role in facilitating their integration while maintaining reliability, security, and quality of supply. Grid codes set technical requirements for generators connecting to the grid. They aim to address challenges from the variability and uncertainty of renewable energy sources while allowing for sustainable growth. Requirements in grid codes need to be tailored to each country's power system characteristics and adapted over time as the system evolves.
Analysis of Power Factor Improvement Techniques in case of Non Linear System ...Kaustubh Nande
The presentation provides a brief overview of the technology employed to eliminate the power factor reduction caused by non linear loads in the network.
Power quality-disturbances and monitoring SeminarSurabhi Vasudev
The document provides an overview of power quality monitoring and automatic power quality disturbance classification. It defines power quality and discusses increased interest in power quality. It describes various power quality disturbances like voltage fluctuations, harmonics, sags, and swells. It then discusses automatic power quality disturbance classifiers which use techniques like segmentation, feature extraction, and classification to identify different disturbance types. Neural networks and expert systems are presented as methods for automatic classification. The document emphasizes the importance of power quality monitoring and classification systems.
Improved Controller for the Dual Topology of the Unified Power Quality Condit...IRJET Journal
This document presents an improved controller for the dual topology unified power quality conditioner (iUPQC) that extends its applicability for power quality compensation and microgrid applications. The iUPQC can provide reactive power support to regulate the voltage at both the load bus and grid-side bus, acting as a static synchronous compensator (STATCOM) on the grid side while also providing typical UPQC functions like mitigating voltage sags/swells at the load side. Simulation results are provided to validate the new functionality of the device.
Adaptive Modified Minimally Switched Hysteresis Controlled Shunt Active Power...idescitation
The main focus of this article is to investigate the
effects of Adaptive control on the switching frequency and
Total Harmonic Distortion of a modified, minimally switched
hysteresis controlled shunt active power filter. Reference
current generation was done using Instantaneous real and
reactive power algorithm. Pulses to the minimally switched
grid interactive inverter in which only two switches are
controlled at a time, had been generated using a modified
hysteresis current controller. Use of Modified Hysteresis
controller results in reducing the switching loses to one-third
but results in increase in current THD than the conventional
hysteresis controller. To overcome this, pulses to the modified
hysteresis controller were generated employing adaptive
control by modifying pulses from a conventional hysteresis
controller. Using adaptive control instantaneous switching
frequency was reduced and maintained nearly constant and
THD was brought to the limits specified by the standards,
thus overcoming the disadvantage of conventional and modified
hysteresis controller which has variable switching frequency.
A comparison of Modified Hysteresis controller with and
without Adaptive control has been made, to show the reduction
in THD. The system was simulated using MATLAB-
SIMULINK.
Low frequency ac transmission for power systems by Aamir SaleemAamir Saleem
Voltage instability is one of the major issue in
HVAC power network operating at 50 Hz frequency due to
limited power transfer capability and distance limit. The stable
operation of power system must be kept within limits to
increase the efficiency of power transmission system. In this
research Low Frequency AC (LFAC) transmission system has
been proposed as a new power transmission technology to
reduce the losses of transmission network and controlling the
reactive power using Flexible AC transmission device. A
LFAC Transmission lines operates at 16.7Hz frequency for
transmission of power from source to load and use two
Frequency converters at source and load side. The normal
operation of power system depends on the reactive power
flowing through the power transmission lines, which can be
adjusted by a flexible AC transmission device; Static
synchronous compensator. LFAC transmission lines with
STATCOM controller improve the Power system voltage
stability under various disturbances and enhance the power
transmission capability as compare to HVAC transmission.
The simulations are done in Matlab Simulink 2017a .The
Output of Matlab Simulink model shows that voltage will
become Stable and reactive power is compensated for best
performance for power system.
Harmonics created by nonlinear loads such as arc furnaces, cycloconverters and motor drives destroys the power quality in the system. They not only affect the working of adjacent loads but also shorten the life of power equipment by creating excessive losses. ‘Shunt Active Power Filter’ is a modern addition to family of compensating devices. It has superior qualities over its contemporaries namely SVCs and STATCOMs. It not only mitigates harmonics within the allowable limits defined by IEEE Std 519-1992, but also compensates unbalancing and reactive power in the system. Consequently, only active power is supplied by the source thus power factor approaches unity. A fully functional Simulink model of Shunt Active Power Filter has been designed based on ‘Instantaneous Power Theory’ or ‘p-q Theory’. The results of simulation comply with all the features described by the theory, justifying employment of SAPF in the industry.
POWER QUALITY IMPROVEMENT AND FAULT RIDE THROUGH OF GRID CONNECTED WIND ENE...Bharadwaj S
This work tries to improve the power quality by compensating reactive power with Active Power Filters and also to analyze Fault Ride Through of Grid connected wind energy conversion systems.
Variable renewable energy sources like solar and wind power are growing rapidly worldwide, with investments in renewable power exceeding those in non-renewable sources in recent years. As the share of variable renewable energy increases in many power systems, grid codes are playing an important role in facilitating their integration while maintaining reliability, security, and quality of supply. Grid codes set technical requirements for generators connecting to the grid. They aim to address challenges from the variability and uncertainty of renewable energy sources while allowing for sustainable growth. Requirements in grid codes need to be tailored to each country's power system characteristics and adapted over time as the system evolves.
Analysis of Power Factor Improvement Techniques in case of Non Linear System ...Kaustubh Nande
The presentation provides a brief overview of the technology employed to eliminate the power factor reduction caused by non linear loads in the network.
The document summarizes key aspects of electrical power transmission including:
1. Power is generated at high voltages then stepped up for long distance transmission. Transmission systems use high voltage AC or DC to transmit power from generating stations to load centers.
2. Right of way management is important for transmission line safety and maintenance. ROW width depends on transmission line voltage level.
3. Smart grids enable two-way communication between utilities and customers for improved efficiency, reliability, and integration of renewable energy.
Matlab/simulink simulation of unified power quality conditioner-battery energ...IJECEIAES
This paper presents performance analysis of Unified Power Quality Conditioner-Battery Energy Storage (UPQC-BES) system supplied by Photovoltaic (PV)-Wind Hybrid connected to three phase three wire (3P3W) of 380 volt (L-L) and 50 hertz distribution system. The performance of supply system is compared with two renewable energy (RE) sources i.e. PV and Wind, respectively. Fuzzy Logic Controller (FLC) is implemented to maintain DC voltage across the capacitor under disturbance scenarios of source and load as well as to compare the results with Proportional Intergral (PI) controller. There are six scenarios of disturbance i.e. (1) non-linear load (NL), (2) unbalance and nonlinear load (Unba-NL), (3) distortion supply and non-linear load (Dis-NL), (4) sag and non-linear load (Sag-NL), (5) swell and non-linear load (Swell-NL), and (6) interruption and non-linear load (Inter-NL). In disturbance scenario 1 to 5, implementation of FLC on UPQC-BES system supplied by three RE sources is able to obtain average THD of load voltage/source current slightly better than PI. Furthermore under scenario 6, FLC applied on UPQC-BES system supplied by three RE sources gives significantly better result of average THD of load voltage/source current than PI. This research is simulated using Matlab/Simulink.
International Journal of Engineering and Science Invention (IJESI)inventionjournals
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
The document summarizes power quality issues including defects like under voltage, over voltage, dips, surges, blackouts, harmonics, and transients. It discusses who is responsible for ensuring power quality and some typical problems caused by defects. Solutions mentioned include surge protection, UPS systems, generators, filters, proper wiring, and load zoning. Assuring high quality power is challenging as electricity must flow continuously from generators to consumers via a shared infrastructure.
This document proposes using a PWM voltage source converter with an input filter as a front end converter to improve power quality by drawing a sinusoidal input current with low harmonic distortion and adjustable power factor close to unity. It describes the modeling and control strategy for the converter. The control strategy uses a synchronous reference frame and PI controllers to control the d-q axis currents and maintain the DC bus voltage. Simulation results show the converter achieves near unity power factor with low current harmonic distortion and regulates the DC bus voltage during load changes while allowing power reversal capability. The values of the input inductor and DC bus capacitor are designed based on the system specifications and ripple requirements.
Design of UPQC with Minimization of DC Link voltage for the Improvement of Po...IDES Editor
This document describes a proposed design for a Unified Power Quality Conditioner (UPQC) that uses fuzzy logic control to minimize DC link voltage fluctuations and improve power quality. The UPQC combines series and shunt inverters to compensate for voltage sags/swells, unbalanced voltages, harmonics, and reactive power. Fuzzy logic controllers are used to stabilize the DC link voltage and balance active power between the inverters. Simulation results show the fuzzy logic control provides better DC link voltage regulation compared to PI control, improving the UPQC's ability to compensate for power quality issues.
Unified power quality conditioner for compensating power quality problem adIAEME Publication
This document describes a proposed Adaptive Neuro-Fuzzy Inference System (ANFIS) based Unified Power Quality Conditioner (UPQC) to improve power quality compensation performance. A UPQC uses two voltage source inverters to compensate for both voltage and current disturbances but has high DC link capacitor discharge times. The proposed system adds an ANFIS device to generate a bias voltage that maintains the DC link voltage at a lower level. ANFIS combines neural networks and fuzzy logic to approximate nonlinear functions from numerical and linguistic data. The generated fuzzy rules are trained using a neural network to produce the desired output. Analysis shows the proposed ANFIS-based UPQC provides better power quality compensation than controllers using neural networks,
A Voltage Controlled Dstatcom for Power Quality Improvementiosrjce
Due to increasing complexity in the power system, voltage sag is becoming one of the most significant
power quality problems. Voltage sag is a short reduction voltage from nominal voltage, occurs in a short time.
If the voltage sags exceed two to three cycles, then manufacturing systems making use of sensitive electronic
equipments are likely to be affected leading to major problems. It ultimately leads to wastage of resources (both
material and human) as well as financial losses. This is possible only by ensuring that uninterrupted flow of
power is maintained at proper voltage levels. This project tends look at the solving the sag problems by using
custom power devices such as Distribution Static compensator (D-STATCOM).Proposed scheme follows a new
algorithm to generate reference voltage for a distribution static compensator (DSTATCOM) operating in
voltage-control mode. The proposed scheme ensures that unity power factor (UPF) is achieved at the load
terminal during nominal operation, which is not possible in the traditional method. Also, the compensator
injects lower currents therefore, reduces losses in the feeder and voltage-source inverter. Further, a saving in
the rating of DSTATCOM is achieved which increases its capacity to mitigate voltage sag. Nearly UPF is
maintained, while regulating voltage at the load terminal, during load change. The state-space model of
DSTATCOM is incorporated with the deadbeat predictive controller for fast load voltage regulation during
voltage disturbances. With these features, this scheme allows DSTATCOM to tackle power-quality issues by
providing power factor correction, harmonic elimination, load balancing, and voltage regulation based on the
load requirement.
The document discusses using a STATCOM and battery energy storage system to improve power quality from a grid-connected wind energy system. It proposes a control scheme where the STATCOM injects current to cancel out reactive and harmonic parts of current from the induction generator and nonlinear load. It presents the system topology, operation, bang-bang controller for the STATCOM, and simulation results showing the STATCOM reduces total harmonic distortion of source current from 4.06% to 0.40%, improving power quality. The document concludes that the STATCOM-BESS control system eliminates harmonic load current and maintains unity power factor and in-phase voltages and currents at the source.
Hardware Implementation of Single Phase Power Factor Correction System using ...IAES-IJPEDS
Rapid increase of consumers in electronics devices and the use of mains rectification circuits inside these electronic devices is the root cause of mains harmonic distortion. Automatic power factor correction techniques can be applied to the industries, power systems and households to make them stable inturns increases the efficiency of system as well as the apparatus. This paper deals with the hardware design of active power factor correction circuit employing boost converter which is used to boost the DC voltages with a controller based on PID control strategy. The pulses given to power switches by pulse width modulation techniques generated by utilizing micro-controller board, Arduino thus obviating the need of complex hardware circuitry. MATLAB/SIMULINK was used to design and tune the PID controller parameters. The simulation results are matching with the predictions and the same was implemented as hardware. The waveforms various test points and across capacitors were obtained, studied and compared with the theoretical waveforms and are found to be in precise proximity of theoretical waveforms.
Power quality improvement using upqc with soft computing method: Fuzzy logicSakti Prasanna Muduli
Now a days problems regarding power quality is more in large inter connected power systems. There are many method to mitigate these problems but using the latest most efficient compensation method is some what impressive. Here is the brief explanations regarding UPQC using soft computing method(fuzzy logic). This was my academic project along with my friends.
Definition of power Quality, power quality terminology, power quality issues, Susceptibility Criteria, Responsibility of supplier and users of elect power, Standards.
This document presents a project on improving power quality using a multi converter unified power quality conditioner (MC-UPQC). The project is presented by a student under the guidance of a professor. The MC-UPQC uses voltage source converters connected back-to-back to compensate for supply voltage and load current imperfections. It can also compensate for power quality issues across multiple feeders by sharing compensation capabilities. The document outlines the objectives, existing systems, proposed MC-UPQC system, literature review, problem formation, test system design, simulation results and conclusions.
This document discusses the performance analysis of a three-phase four-wire shunt active power filter (SAPF). It first introduces power quality issues caused by nonlinear loads and defines active power filters as emerging devices that can effectively diminish harmonic pollution. It then presents the mathematical model of a SAPF using instantaneous reactive power theory. The performance of a three-phase four-wire SAPF is analyzed using proportional-integral (PI) and proportional-integral-derivative (PID) controllers. Simulation results in MATLAB verify the SAPF can compensate for harmonics and reactive power when controlled by PI and PID controllers.
Design and Simulation of Power Factor Correction Boost Converter using Hyster...ijtsrd
Nowadays various power converters like AC DC or DC DC are widely used due to their flexible output voltage and high efficiency. But these converters take the current in the form of pulses from the utility grid so that the high Total Harmonic Distortion THD and poor Power Factor PF are the major disadvantages of these converters. Hence there is a continuous need for PF improvement and reduction of line current harmonics. The most popular topology for Active Power Factor Correction APFC is a boost converter as it draws continuous input current. This input current can be manipulated by Hysteresis control technique. The boost converter can perform this type of active power factor correction in many discontinuous and continuous modes. The design and simulation of boost converter with power factor correction in continuous conduction mode is represented by using MATLAB SIMULINK software. Yu Yu Khin | Yan Aung Oo "Design and Simulation of Power Factor Correction Boost Converter using Hysteresis Control" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd27905.pdfPaper URL: https://www.ijtsrd.com/engineering/electrical-engineering/27905/design-and-simulation-of-power-factor-correction-boost-converter-using-hysteresis-control/yu-yu-khin
Power factor correction using bridgeless boost topologyDHEERAJ DHAKAR
This document summarizes research on using a bridgeless boost topology for power factor correction. It begins by introducing power factor and the issues caused by low power factor systems. It then discusses conventional boost converter topologies used for power factor correction and the benefits of a bridgeless boost topology. The document presents simulations comparing the performance of a conventional boost converter to a bridgeless boost converter for power factor correction. It finds that the bridgeless topology achieves higher efficiency power factor correction.
A novel power converter that can perform both voltage and frequency conversion was proposed. Inappropriate power supply can damage sensitive sub-components and render the connected device inoperable. Henceforth, the proposed voltage–frequency converter acts as an interface to plug any electrical device directly into an electrical socket and provide the voltage and frequency required. The converter used a synchronous reference frame proportional–integral (SRFPI) controller to regulate the instantaneous output voltage and to improve steady state performance. Because the PI controller works together with the synchronous reference frame controller, it is difficult to tune the PI control parameters. To overcome this issue, a new meta heuristic optimization technique called lightening search algorithm (LSA) optimization was used to identify the optimum PI parameter values. A detailed description of the system operation and control strategy was presented. Finally, the performance of the converter was analyzed and verified by simulation and experimental results. The experimental result has shown that the proposed system has satisfactory output voltage and frequency under different input voltages.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
This document appears to be a syllabus for a course on power quality. It includes 5 units: introduction to power quality, voltage sags and interruptions, over voltages, harmonics, and power quality monitoring. The introduction defines power quality and discusses various power quality issues like harmonics, voltage fluctuations, transients, and imbalance. It also explains why power quality is important for utilities and customers.
This document discusses a 5 kW three-channel constant conduction mode (CCM) power factor correction (PFC) controller. It begins with an abstract that introduces PFC and CCM topology. It then provides background on power factor, classes of equipment according to regulations, AC-DC rectifiers, boost converters, and PFC. It presents the basic structure of average current mode controlled PFC and includes a Simulink model of a closed loop boost converter PFC with parameters. Simulation waveforms are shown and conclusions drawn that CCM PFC can achieve near unity power factor and total harmonic distortion under 15%.
Design of bridgeless high-power-factor buck-converter operating in discontinu...IRJET Journal
The document proposes a new bridgeless buck converter operating in discontinuous capacitor voltage mode (DCVM) for power factor correction. Key advantages of the proposed topology include lower conduction losses compared to conventional topologies due to fewer simultaneously conducting semiconductor components. The DCVM operation provides zero-voltage switching for the power switches and zero-voltage turn-on for the output diode, improving efficiency. Simulation results show the converter achieves high power factor and low total harmonic distortion in the input current under different load conditions.
The document summarizes key aspects of electrical power transmission including:
1. Power is generated at high voltages then stepped up for long distance transmission. Transmission systems use high voltage AC or DC to transmit power from generating stations to load centers.
2. Right of way management is important for transmission line safety and maintenance. ROW width depends on transmission line voltage level.
3. Smart grids enable two-way communication between utilities and customers for improved efficiency, reliability, and integration of renewable energy.
Matlab/simulink simulation of unified power quality conditioner-battery energ...IJECEIAES
This paper presents performance analysis of Unified Power Quality Conditioner-Battery Energy Storage (UPQC-BES) system supplied by Photovoltaic (PV)-Wind Hybrid connected to three phase three wire (3P3W) of 380 volt (L-L) and 50 hertz distribution system. The performance of supply system is compared with two renewable energy (RE) sources i.e. PV and Wind, respectively. Fuzzy Logic Controller (FLC) is implemented to maintain DC voltage across the capacitor under disturbance scenarios of source and load as well as to compare the results with Proportional Intergral (PI) controller. There are six scenarios of disturbance i.e. (1) non-linear load (NL), (2) unbalance and nonlinear load (Unba-NL), (3) distortion supply and non-linear load (Dis-NL), (4) sag and non-linear load (Sag-NL), (5) swell and non-linear load (Swell-NL), and (6) interruption and non-linear load (Inter-NL). In disturbance scenario 1 to 5, implementation of FLC on UPQC-BES system supplied by three RE sources is able to obtain average THD of load voltage/source current slightly better than PI. Furthermore under scenario 6, FLC applied on UPQC-BES system supplied by three RE sources gives significantly better result of average THD of load voltage/source current than PI. This research is simulated using Matlab/Simulink.
International Journal of Engineering and Science Invention (IJESI)inventionjournals
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
The document summarizes power quality issues including defects like under voltage, over voltage, dips, surges, blackouts, harmonics, and transients. It discusses who is responsible for ensuring power quality and some typical problems caused by defects. Solutions mentioned include surge protection, UPS systems, generators, filters, proper wiring, and load zoning. Assuring high quality power is challenging as electricity must flow continuously from generators to consumers via a shared infrastructure.
This document proposes using a PWM voltage source converter with an input filter as a front end converter to improve power quality by drawing a sinusoidal input current with low harmonic distortion and adjustable power factor close to unity. It describes the modeling and control strategy for the converter. The control strategy uses a synchronous reference frame and PI controllers to control the d-q axis currents and maintain the DC bus voltage. Simulation results show the converter achieves near unity power factor with low current harmonic distortion and regulates the DC bus voltage during load changes while allowing power reversal capability. The values of the input inductor and DC bus capacitor are designed based on the system specifications and ripple requirements.
Design of UPQC with Minimization of DC Link voltage for the Improvement of Po...IDES Editor
This document describes a proposed design for a Unified Power Quality Conditioner (UPQC) that uses fuzzy logic control to minimize DC link voltage fluctuations and improve power quality. The UPQC combines series and shunt inverters to compensate for voltage sags/swells, unbalanced voltages, harmonics, and reactive power. Fuzzy logic controllers are used to stabilize the DC link voltage and balance active power between the inverters. Simulation results show the fuzzy logic control provides better DC link voltage regulation compared to PI control, improving the UPQC's ability to compensate for power quality issues.
Unified power quality conditioner for compensating power quality problem adIAEME Publication
This document describes a proposed Adaptive Neuro-Fuzzy Inference System (ANFIS) based Unified Power Quality Conditioner (UPQC) to improve power quality compensation performance. A UPQC uses two voltage source inverters to compensate for both voltage and current disturbances but has high DC link capacitor discharge times. The proposed system adds an ANFIS device to generate a bias voltage that maintains the DC link voltage at a lower level. ANFIS combines neural networks and fuzzy logic to approximate nonlinear functions from numerical and linguistic data. The generated fuzzy rules are trained using a neural network to produce the desired output. Analysis shows the proposed ANFIS-based UPQC provides better power quality compensation than controllers using neural networks,
A Voltage Controlled Dstatcom for Power Quality Improvementiosrjce
Due to increasing complexity in the power system, voltage sag is becoming one of the most significant
power quality problems. Voltage sag is a short reduction voltage from nominal voltage, occurs in a short time.
If the voltage sags exceed two to three cycles, then manufacturing systems making use of sensitive electronic
equipments are likely to be affected leading to major problems. It ultimately leads to wastage of resources (both
material and human) as well as financial losses. This is possible only by ensuring that uninterrupted flow of
power is maintained at proper voltage levels. This project tends look at the solving the sag problems by using
custom power devices such as Distribution Static compensator (D-STATCOM).Proposed scheme follows a new
algorithm to generate reference voltage for a distribution static compensator (DSTATCOM) operating in
voltage-control mode. The proposed scheme ensures that unity power factor (UPF) is achieved at the load
terminal during nominal operation, which is not possible in the traditional method. Also, the compensator
injects lower currents therefore, reduces losses in the feeder and voltage-source inverter. Further, a saving in
the rating of DSTATCOM is achieved which increases its capacity to mitigate voltage sag. Nearly UPF is
maintained, while regulating voltage at the load terminal, during load change. The state-space model of
DSTATCOM is incorporated with the deadbeat predictive controller for fast load voltage regulation during
voltage disturbances. With these features, this scheme allows DSTATCOM to tackle power-quality issues by
providing power factor correction, harmonic elimination, load balancing, and voltage regulation based on the
load requirement.
The document discusses using a STATCOM and battery energy storage system to improve power quality from a grid-connected wind energy system. It proposes a control scheme where the STATCOM injects current to cancel out reactive and harmonic parts of current from the induction generator and nonlinear load. It presents the system topology, operation, bang-bang controller for the STATCOM, and simulation results showing the STATCOM reduces total harmonic distortion of source current from 4.06% to 0.40%, improving power quality. The document concludes that the STATCOM-BESS control system eliminates harmonic load current and maintains unity power factor and in-phase voltages and currents at the source.
Hardware Implementation of Single Phase Power Factor Correction System using ...IAES-IJPEDS
Rapid increase of consumers in electronics devices and the use of mains rectification circuits inside these electronic devices is the root cause of mains harmonic distortion. Automatic power factor correction techniques can be applied to the industries, power systems and households to make them stable inturns increases the efficiency of system as well as the apparatus. This paper deals with the hardware design of active power factor correction circuit employing boost converter which is used to boost the DC voltages with a controller based on PID control strategy. The pulses given to power switches by pulse width modulation techniques generated by utilizing micro-controller board, Arduino thus obviating the need of complex hardware circuitry. MATLAB/SIMULINK was used to design and tune the PID controller parameters. The simulation results are matching with the predictions and the same was implemented as hardware. The waveforms various test points and across capacitors were obtained, studied and compared with the theoretical waveforms and are found to be in precise proximity of theoretical waveforms.
Power quality improvement using upqc with soft computing method: Fuzzy logicSakti Prasanna Muduli
Now a days problems regarding power quality is more in large inter connected power systems. There are many method to mitigate these problems but using the latest most efficient compensation method is some what impressive. Here is the brief explanations regarding UPQC using soft computing method(fuzzy logic). This was my academic project along with my friends.
Definition of power Quality, power quality terminology, power quality issues, Susceptibility Criteria, Responsibility of supplier and users of elect power, Standards.
This document presents a project on improving power quality using a multi converter unified power quality conditioner (MC-UPQC). The project is presented by a student under the guidance of a professor. The MC-UPQC uses voltage source converters connected back-to-back to compensate for supply voltage and load current imperfections. It can also compensate for power quality issues across multiple feeders by sharing compensation capabilities. The document outlines the objectives, existing systems, proposed MC-UPQC system, literature review, problem formation, test system design, simulation results and conclusions.
This document discusses the performance analysis of a three-phase four-wire shunt active power filter (SAPF). It first introduces power quality issues caused by nonlinear loads and defines active power filters as emerging devices that can effectively diminish harmonic pollution. It then presents the mathematical model of a SAPF using instantaneous reactive power theory. The performance of a three-phase four-wire SAPF is analyzed using proportional-integral (PI) and proportional-integral-derivative (PID) controllers. Simulation results in MATLAB verify the SAPF can compensate for harmonics and reactive power when controlled by PI and PID controllers.
Design and Simulation of Power Factor Correction Boost Converter using Hyster...ijtsrd
Nowadays various power converters like AC DC or DC DC are widely used due to their flexible output voltage and high efficiency. But these converters take the current in the form of pulses from the utility grid so that the high Total Harmonic Distortion THD and poor Power Factor PF are the major disadvantages of these converters. Hence there is a continuous need for PF improvement and reduction of line current harmonics. The most popular topology for Active Power Factor Correction APFC is a boost converter as it draws continuous input current. This input current can be manipulated by Hysteresis control technique. The boost converter can perform this type of active power factor correction in many discontinuous and continuous modes. The design and simulation of boost converter with power factor correction in continuous conduction mode is represented by using MATLAB SIMULINK software. Yu Yu Khin | Yan Aung Oo "Design and Simulation of Power Factor Correction Boost Converter using Hysteresis Control" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd27905.pdfPaper URL: https://www.ijtsrd.com/engineering/electrical-engineering/27905/design-and-simulation-of-power-factor-correction-boost-converter-using-hysteresis-control/yu-yu-khin
Power factor correction using bridgeless boost topologyDHEERAJ DHAKAR
This document summarizes research on using a bridgeless boost topology for power factor correction. It begins by introducing power factor and the issues caused by low power factor systems. It then discusses conventional boost converter topologies used for power factor correction and the benefits of a bridgeless boost topology. The document presents simulations comparing the performance of a conventional boost converter to a bridgeless boost converter for power factor correction. It finds that the bridgeless topology achieves higher efficiency power factor correction.
A novel power converter that can perform both voltage and frequency conversion was proposed. Inappropriate power supply can damage sensitive sub-components and render the connected device inoperable. Henceforth, the proposed voltage–frequency converter acts as an interface to plug any electrical device directly into an electrical socket and provide the voltage and frequency required. The converter used a synchronous reference frame proportional–integral (SRFPI) controller to regulate the instantaneous output voltage and to improve steady state performance. Because the PI controller works together with the synchronous reference frame controller, it is difficult to tune the PI control parameters. To overcome this issue, a new meta heuristic optimization technique called lightening search algorithm (LSA) optimization was used to identify the optimum PI parameter values. A detailed description of the system operation and control strategy was presented. Finally, the performance of the converter was analyzed and verified by simulation and experimental results. The experimental result has shown that the proposed system has satisfactory output voltage and frequency under different input voltages.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
This document appears to be a syllabus for a course on power quality. It includes 5 units: introduction to power quality, voltage sags and interruptions, over voltages, harmonics, and power quality monitoring. The introduction defines power quality and discusses various power quality issues like harmonics, voltage fluctuations, transients, and imbalance. It also explains why power quality is important for utilities and customers.
This document discusses a 5 kW three-channel constant conduction mode (CCM) power factor correction (PFC) controller. It begins with an abstract that introduces PFC and CCM topology. It then provides background on power factor, classes of equipment according to regulations, AC-DC rectifiers, boost converters, and PFC. It presents the basic structure of average current mode controlled PFC and includes a Simulink model of a closed loop boost converter PFC with parameters. Simulation waveforms are shown and conclusions drawn that CCM PFC can achieve near unity power factor and total harmonic distortion under 15%.
Design of bridgeless high-power-factor buck-converter operating in discontinu...IRJET Journal
The document proposes a new bridgeless buck converter operating in discontinuous capacitor voltage mode (DCVM) for power factor correction. Key advantages of the proposed topology include lower conduction losses compared to conventional topologies due to fewer simultaneously conducting semiconductor components. The DCVM operation provides zero-voltage switching for the power switches and zero-voltage turn-on for the output diode, improving efficiency. Simulation results show the converter achieves high power factor and low total harmonic distortion in the input current under different load conditions.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
This document discusses a dual feedback PWM controller with a single-stage boost converter circuit designed to improve power factor and reduce harmonic current in AC/DC drives. The circuit aims to shape the input current to be sinusoidal using PWM control of the boost inductor current based on feedback of the inductor current and output voltage. Simulation results using fast Fourier transform show the circuit can greatly reduce current harmonics, improving the power factor and sinusoidal shape of the input current to enhance the performance of AC/DC drives.
IRJET- Automated Energy Monitering System and Power Factor ImprovementIRJET Journal
This document describes an automated energy monitoring system and power factor improvement project. The system continuously monitors the power factor of an electrical load and automatically improves it using a capacitor bank. It measures the reactive power consumed by inductive loads and compensates for the lagging power factor. This correction brings the power factor closer to unity, providing benefits like reduced power losses, increased system capacity, and improved voltages. The system uses current and potential transformers to monitor voltage and current. A microcontroller then calculates the power factor and controls relays to switch capacitors on or off as needed to improve the overall power factor.
Design and Simulation of PFC Circuit for AC/DC Converter Based on PWM Boost R...IOSR Journals
This document describes the design and simulation of a power factor correction (PFC) circuit for an AC/DC converter using a PWM boost regulator. Non-linear loads draw non-sinusoidal current from the power supply, reducing power quality. The proposed PFC circuit utilizes current shaping techniques with the boost inductor to generate a sinusoidal input current and improve the power factor. Simulation results showed the input current was sinusoidal in phase with the line voltage, achieving near unity power factor. Harmonic analysis revealed the 3rd, 17th, and 19th harmonics were significantly reduced after PFC, improving the power factor from 62.3% to 98.8%. The PFC circuit demonstrated effective mitigation of current harmon
This document discusses power quality issues in electricity distribution systems and solutions using power electronics. It defines power quality as dealing with voltage magnitude disturbances and waveform distortions. Common power quality issues include transients, voltage variations, waveform distortions, and frequency variations. International standards like IEEE 519-1992 establish limits for harmonic distortions. Power electronic solutions for improving power quality include shunt controllers like static VAR compensators (D-SVC) and distribution static synchronous compensators (D-STATCOM), and series controllers like dynamic voltage restorers. D-SVC and D-STATCOM are discussed in further detail regarding their operation and advantages.
IRJET- Improving Power Quality by using MC-UPQCIRJET Journal
This document discusses improving power quality by using a Multiconverter Unified Power Quality Conditioner (MC-UPQC). The MC-UPQC consists of one shunt voltage-source converter (VSC) and two or more series VSCs. It can be applied to adjacent feeders to simultaneously compensate for supply voltage imperfections and load current imperfections on the main feeder, as well as fully compensate supply voltage imperfections on other feeders. The converters are connected back-to-back on the DC side and share a common DC link capacitor, allowing power transfer between feeders. This configuration can compensate for sags/swells and interruptions in both feeders without battery storage. Simulation results will illustrate the performance
Average current control of DC-DC Cuk Converters as Power Factor CorrectorIJERA Editor
This document discusses using a DC-DC Cuk converter with average current control to achieve power factor correction for a LED lighting load. It provides background on LED lighting and power factor correction needs. The paper models the Cuk converter and designs current and voltage control loops to regulate the output voltage while producing a sinusoidal input current with low total harmonic distortion and near unity power factor. Simulation results show the input current closely matching the input voltage waveform and low output voltage ripple, demonstrating the effectiveness of the control method.
IRJET- A Systematic Approach to Design Single Phase Transformer Less Inve...IRJET Journal
This document presents a new transformerless inverter topology for grid-tied photovoltaic systems that can control reactive power. The topology aims to improve efficiency by utilizing MOSFET switches and maintains a constant common mode voltage to reduce leakage currents. It was tested with a 1 kW prototype and experimental results showed it can inject reactive power into the grid without additional current distortion or leakage. The control scheme for the topology is also analyzed, demonstrating it can effectively respond to changes in active power reference.
A Review on Optimization Techniques for Power Quality Improvement using DSTAT...ijtsrd
This document summarizes a research paper that proposes using a neural network approach to optimize techniques for improving power quality using a DSTATCOM (Distribution Static Compensator). It begins by introducing common power quality issues like voltage sags, swells, and harmonics. It then discusses different custom power devices used to address these issues, focusing on the DSTATCOM. The paper proposes a control algorithm using a backpropagation neural network to extract reference currents and control the DSTATCOM for reactive power compensation, load balancing, and voltage regulation. Simulation results showed the DSTATCOM was able to satisfactorily compensate for different types of loads using this neural network approach.
Bridgeless CUK Power Factor Corrector with Regulated Output Voltagepaperpublications3
Abstract:A single-phase, bridgeless Cuk AC/DC power factor correction (PFC) rectifier with regulated positive output voltage is proposed in this work. For low output voltage product applications, the rectifier is designed to convert high input voltage to low output voltage. This work presents bridgeless single-phase AC-DC power factor correction (PFC) rectifier based on Cuk topology. The topology does not possess input diode bridge and have only single semiconductor switches in the current owing path during each interval of the switching cycle, which resulting in less conduction losses and better thermal management. This topology is designed to work in discontinuous conduction mode (DCM). The advantages of Cuk converter are also available when bridgeless circuit topology is introduced. The operation is symmetrical in two half-line cycles of input voltage. In conventional, output voltage varies according to input voltage. A closed loop control technique is designed to regulate the output voltage in the desired level. Performance and applicability of this converter is presented on the basis of simulation in MATLAB/SIMULINK.
REDUCING SOURCE CURRENT HARMONICS DUE TO BALANCED AND UN-BALANCED VOLTAGE VAR...IJCI JOURNAL
This document summarizes a research paper that examines reducing current harmonics due to voltage variations using a fuzzy-controlled D-STATCOM. It begins with an introduction that describes the increasing need for power quality improvements and custom power devices. It then provides details on the principal and control strategy of a D-STATCOM, which uses a voltage source converter to inject current and regulate voltage. The proposed method uses an instant power theory with fuzzy logic control of the D-STATCOM to generate reference currents, providing better compensation than a proportional-integral controller. Simulation results showed the fuzzy control approach more accurately compensated for distorted currents and reactive power under both steady and transient states.
This document discusses a study on using a Unified Power Quality Conditioner (UPQC) to improve power quality issues. The UPQC is a device that uses both series and shunt active power filters to compensate for voltage and current related problems simultaneously. The study uses MATLAB simulation to demonstrate how a UPQC model can reduce the total harmonic distortion (THD) in the source voltage, source current, and load voltage caused by nonlinear loads. Control strategies like synchronous reference frame (SRF) theory are applied to the UPQC operation. The document provides background on power quality issues like voltage sag, swell, harmonics, and waveform distortion. It also describes the basic configuration, design, and control methods of the UPQC using S
1.compensation of reactive power using d statcom in grid interfaced pv systemEditorJST
This document summarizes a research paper on using a D-STATCOM (Distribution Static Compensator) with an LCL passive filter to compensate for reactive power and improve power quality in a grid-interfaced photovoltaic (PV) system. The D-STATCOM injects current to mitigate voltage fluctuations. Simulation results show improvements in three-phase output voltage at the transmission and distribution levels as well as increased power generation from both the transmission system and PV system. In conclusion, the integration of FACTS devices like the D-STATCOM can help maintain desired power quality standards while reducing distortions and improving the power factor.
IRJET - A Comparative Analysis of Cuk and Buck Boost Converter for PFC in...IRJET Journal
This document presents a comparative analysis of Cuk and buck-boost converters for power factor correction in an induction motor drive system. It discusses the operation and design of Cuk and buck-boost converters, and simulations are performed in MATLAB/Simulink to evaluate the performance of each converter in improving the power factor when used with a three-phase induction motor. The results show that while both converters increased the power factor compared to without correction, the Cuk converter achieved a higher power factor of 0.96 compared to 0.9 for the buck-boost converter. Therefore, the Cuk converter provides better power factor correction for an induction motor drive.
1. The document describes a five-level cascaded H-bridge inverter used as a distribution static compensator (DSTATCOM) to compensate for reactive power and harmonics in a power system.
2. A DSTATCOM is connected in shunt with the distribution system and uses a voltage source converter to generate a set of three-phase output voltages that can be adjusted to control the exchange of active and reactive power with the system.
3. The five-level cascaded H-bridge inverter topology reduces device voltage stress and output harmonics. Level shifted pulse width modulation and phase shifted pulse width modulation techniques are investigated for controlling the DSTATCOM.
This document is a project report submitted by Soumya Dash to fulfill requirements for a Bachelor of Technology degree in Electrical and Electronics Engineering. The project involves designing a SEPIC converter for power factor correction. Chapter 1 introduces the need for power factor correction to eliminate current harmonics and improve power factor. Chapter 2 discusses basic principles of power factor and various control techniques for power factor correction circuits. Chapter 3 describes how harmonic distortion from non-linear loads causes low power factor and defines related terms like harmonics, harmonic distortion, distortion factor, and total harmonic distortion.
A High-Performance SPWM Controller for Three-Phase UPS Systems Operating Unde...ijiert bestjournal
The increased use of rectifiers in critical loads employed by the information technologies,and medical and military equipment mandate the design of uninterruptible power supplies (UPS) with high- quality outputs. The highly nonlinear currents drawn especially by high-power single-phase rectifier loads greatly distort the uninterruptible power supplies (UPS) outputs. The distorted uninterruptible power supplies (UPS) voltages cause generation of low dc voltage at the output of the rectifier loads,which causes high current flow,increased power losses,and possibly the malfunction of the critical load or the uninterruptible power supplies (UPS). As a result,different harmonics mitigating techniques have gained a lot of attention. The main objective of this project is to develop simulation of a high-performance Pulse Width Modulation (PWM) technique based AC-DC converter system operating under highly nonlinear loads using MATLAB/SIMULINK. Here,controlled Insulated-gate bipolar transistor (IGBT) based AC-DC converter is used to supply the load instead of Diode or Thyristor Bridge. The pulse width modulation method is quite effective in controlling the root mean square (RMS) magnitude of the AC-DC converter output voltages and shape of input current. This enables automatic harmonic compensation by Rectifier itself.
This document summarizes a paper that proposes a Green Power Zone (GPZ) concept to provide high quality electrical power. A GPZ would use custom power devices like a DVR, DSTATCOM, and UPQC to regulate voltage and power quality. It would receive power from two independent substations through solid state transfer switches to improve reliability. The GPZ center would monitor power quality and control devices to maintain a stable voltage supply closer to ideal levels, despite faults or interruptions from utilities. Simulation results demonstrated the GPZ's ability to compensate for issues like sags, swells, harmonics and imbalance.
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TUNNELING IN HIMALAYAS WITH NATM METHOD: A SPECIAL REFERENCES TO SUNGAL TUNNE...IRJET Journal
1) The document discusses the Sungal Tunnel project in Jammu and Kashmir, India, which is being constructed using the New Austrian Tunneling Method (NATM).
2) NATM involves continuous monitoring during construction to adapt to changing ground conditions, and makes extensive use of shotcrete for temporary tunnel support.
3) The methodology section outlines the systematic geotechnical design process for tunnels according to Austrian guidelines, and describes the various steps of NATM tunnel construction including initial and secondary tunnel support.
STUDY THE EFFECT OF RESPONSE REDUCTION FACTOR ON RC FRAMED STRUCTUREIRJET Journal
This study examines the effect of response reduction factors (R factors) on reinforced concrete (RC) framed structures through nonlinear dynamic analysis. Three RC frame models with varying heights (4, 8, and 12 stories) were analyzed in ETABS software under different R factors ranging from 1 to 5. The results showed that displacement increased as the R factor decreased, indicating less linear behavior for lower R factors. Drift also decreased proportionally with increasing R factors from 1 to 5. Shear forces in the frames decreased with higher R factors. In general, R factors of 3 to 5 produced more satisfactory performance with less displacement and drift. The displacement variations between different building heights were consistent at different R factors. This study evaluated how R factors influence
A COMPARATIVE ANALYSIS OF RCC ELEMENT OF SLAB WITH STARK STEEL (HYSD STEEL) A...IRJET Journal
This study compares the use of Stark Steel and TMT Steel as reinforcement materials in a two-way reinforced concrete slab. Mechanical testing is conducted to determine the tensile strength, yield strength, and other properties of each material. A two-way slab design adhering to codes and standards is executed with both materials. The performance is analyzed in terms of deflection, stability under loads, and displacement. Cost analyses accounting for material, durability, maintenance, and life cycle costs are also conducted. The findings provide insights into the economic and structural implications of each material for reinforcement selection and recommendations on the most suitable material based on the analysis.
Effect of Camber and Angles of Attack on Airfoil CharacteristicsIRJET Journal
This document discusses a study analyzing the effect of camber, position of camber, and angle of attack on the aerodynamic characteristics of airfoils. Sixteen modified asymmetric NACA airfoils were analyzed using computational fluid dynamics (CFD) by varying the camber, camber position, and angle of attack. The results showed the relationship between these parameters and the lift coefficient, drag coefficient, and lift to drag ratio. This provides insight into how changes in airfoil geometry impact aerodynamic performance.
A Review on the Progress and Challenges of Aluminum-Based Metal Matrix Compos...IRJET Journal
This document reviews the progress and challenges of aluminum-based metal matrix composites (MMCs), focusing on their fabrication processes and applications. It discusses how various aluminum MMCs have been developed using reinforcements like borides, carbides, oxides, and nitrides to improve mechanical and wear properties. These composites have gained prominence for their lightweight, high-strength and corrosion resistance properties. The document also examines recent advancements in fabrication techniques for aluminum MMCs and their growing applications in industries such as aerospace and automotive. However, it notes that challenges remain around issues like improper mixing of reinforcements and reducing reinforcement agglomeration.
Dynamic Urban Transit Optimization: A Graph Neural Network Approach for Real-...IRJET Journal
This document discusses research on using graph neural networks (GNNs) for dynamic optimization of public transportation networks in real-time. GNNs represent transit networks as graphs with nodes as stops and edges as connections. The GNN model aims to optimize networks using real-time data on vehicle locations, arrival times, and passenger loads. This helps increase mobility, decrease traffic, and improve efficiency. The system continuously trains and infers to adapt to changing transit conditions, providing decision support tools. While research has focused on performance, more work is needed on security, socio-economic impacts, contextual generalization of models, continuous learning approaches, and effective real-time visualization.
Structural Analysis and Design of Multi-Storey Symmetric and Asymmetric Shape...IRJET Journal
This document summarizes a research project that aims to compare the structural performance of conventional slab and grid slab systems in multi-story buildings using ETABS software. The study will analyze both symmetric and asymmetric building models under various loading conditions. Parameters like deflections, moments, shears, and stresses will be examined to evaluate the structural effectiveness of each slab type. The results will provide insights into the comparative behavior of conventional and grid slabs to help engineers and architects select appropriate slab systems based on building layouts and design requirements.
A Review of “Seismic Response of RC Structures Having Plan and Vertical Irreg...IRJET Journal
This document summarizes and reviews a research paper on the seismic response of reinforced concrete (RC) structures with plan and vertical irregularities, with and without infill walls. It discusses how infill walls can improve or reduce the seismic performance of RC buildings, depending on factors like wall layout, height distribution, connection to the frame, and relative stiffness of walls and frames. The reviewed research paper analyzes the behavior of infill walls, effects of vertical irregularities, and seismic performance of high-rise structures under linear static and dynamic analysis. It studies response characteristics like story drift, deflection and shear. The document also provides literature on similar research investigating the effects of infill walls, soft stories, plan irregularities, and different
This document provides a review of machine learning techniques used in Advanced Driver Assistance Systems (ADAS). It begins with an abstract that summarizes key applications of machine learning in ADAS, including object detection, recognition, and decision-making. The introduction discusses the integration of machine learning in ADAS and how it is transforming vehicle safety. The literature review then examines several research papers on topics like lightweight deep learning models for object detection and lane detection models using image processing. It concludes by discussing challenges and opportunities in the field, such as improving algorithm robustness and adaptability.
Long Term Trend Analysis of Precipitation and Temperature for Asosa district,...IRJET Journal
The document analyzes temperature and precipitation trends in Asosa District, Benishangul Gumuz Region, Ethiopia from 1993 to 2022 based on data from the local meteorological station. The results show:
1) The average maximum and minimum annual temperatures have generally decreased over time, with maximum temperatures decreasing by a factor of -0.0341 and minimum by -0.0152.
2) Mann-Kendall tests found the decreasing temperature trends to be statistically significant for annual maximum temperatures but not for annual minimum temperatures.
3) Annual precipitation in Asosa District showed a statistically significant increasing trend.
The conclusions recommend development planners account for rising summer precipitation and declining temperatures in
P.E.B. Framed Structure Design and Analysis Using STAAD ProIRJET Journal
This document discusses the design and analysis of pre-engineered building (PEB) framed structures using STAAD Pro software. It provides an overview of PEBs, including that they are designed off-site with building trusses and beams produced in a factory. STAAD Pro is identified as a key tool for modeling, analyzing, and designing PEBs to ensure their performance and safety under various load scenarios. The document outlines modeling structural parts in STAAD Pro, evaluating structural reactions, assigning loads, and following international design codes and standards. In summary, STAAD Pro is used to design and analyze PEB framed structures to ensure safety and code compliance.
A Review on Innovative Fiber Integration for Enhanced Reinforcement of Concre...IRJET Journal
This document provides a review of research on innovative fiber integration methods for reinforcing concrete structures. It discusses studies that have explored using carbon fiber reinforced polymer (CFRP) composites with recycled plastic aggregates to develop more sustainable strengthening techniques. It also examines using ultra-high performance fiber reinforced concrete to improve shear strength in beams. Additional topics covered include the dynamic responses of FRP-strengthened beams under static and impact loads, and the performance of preloaded CFRP-strengthened fiber reinforced concrete beams. The review highlights the potential of fiber composites to enable more sustainable and resilient construction practices.
Survey Paper on Cloud-Based Secured Healthcare SystemIRJET Journal
This document summarizes a survey on securing patient healthcare data in cloud-based systems. It discusses using technologies like facial recognition, smart cards, and cloud computing combined with strong encryption to securely store patient data. The survey found that healthcare professionals believe digitizing patient records and storing them in a centralized cloud system would improve access during emergencies and enable more efficient care compared to paper-based systems. However, ensuring privacy and security of patient data is paramount as healthcare incorporates these digital technologies.
Review on studies and research on widening of existing concrete bridgesIRJET Journal
This document summarizes several studies that have been conducted on widening existing concrete bridges. It describes a study from China that examined load distribution factors for a bridge widened with composite steel-concrete girders. It also outlines challenges and solutions for widening a bridge in the UAE, including replacing bearings and stitching the new and existing structures. Additionally, it discusses two bridge widening projects in New Zealand that involved adding precast beams and stitching to connect structures. Finally, safety measures and challenges for strengthening a historic bridge in Switzerland under live traffic are presented.
React based fullstack edtech web applicationIRJET Journal
The document describes the architecture of an educational technology web application built using the MERN stack. It discusses the frontend developed with ReactJS, backend with NodeJS and ExpressJS, and MongoDB database. The frontend provides dynamic user interfaces, while the backend offers APIs for authentication, course management, and other functions. MongoDB enables flexible data storage. The architecture aims to provide a scalable, responsive platform for online learning.
A Comprehensive Review of Integrating IoT and Blockchain Technologies in the ...IRJET Journal
This paper proposes integrating Internet of Things (IoT) and blockchain technologies to help implement objectives of India's National Education Policy (NEP) in the education sector. The paper discusses how blockchain could be used for secure student data management, credential verification, and decentralized learning platforms. IoT devices could create smart classrooms, automate attendance tracking, and enable real-time monitoring. Blockchain would ensure integrity of exam processes and resource allocation, while smart contracts automate agreements. The paper argues this integration has potential to revolutionize education by making it more secure, transparent and efficient, in alignment with NEP goals. However, challenges like infrastructure needs, data privacy, and collaborative efforts are also discussed.
A REVIEW ON THE PERFORMANCE OF COCONUT FIBRE REINFORCED CONCRETE.IRJET Journal
This document provides a review of research on the performance of coconut fibre reinforced concrete. It summarizes several studies that tested different volume fractions and lengths of coconut fibres in concrete mixtures with varying compressive strengths. The studies found that coconut fibre improved properties like tensile strength, toughness, crack resistance, and spalling resistance compared to plain concrete. Volume fractions of 2-5% and fibre lengths of 20-50mm produced the best results. The document concludes that using a 4-5% volume fraction of coconut fibres 30-40mm in length with M30-M60 grade concrete would provide benefits based on previous research.
Optimizing Business Management Process Workflows: The Dynamic Influence of Mi...IRJET Journal
The document discusses optimizing business management processes through automation using Microsoft Power Automate and artificial intelligence. It provides an overview of Power Automate's key components and features for automating workflows across various apps and services. The document then presents several scenarios applying automation solutions to common business processes like data entry, monitoring, HR, finance, customer support, and more. It estimates the potential time and cost savings from implementing automation for each scenario. Finally, the conclusion emphasizes the transformative impact of AI and automation tools on business processes and the need for ongoing optimization.
Multistoried and Multi Bay Steel Building Frame by using Seismic DesignIRJET Journal
The document describes the seismic design of a G+5 steel building frame located in Roorkee, India according to Indian codes IS 1893-2002 and IS 800. The frame was analyzed using the equivalent static load method and response spectrum method, and its response in terms of displacements and shear forces were compared. Based on the analysis, the frame was designed as a seismic-resistant steel structure according to IS 800:2007. The software STAAD Pro was used for the analysis and design.
Cost Optimization of Construction Using Plastic Waste as a Sustainable Constr...IRJET Journal
This research paper explores using plastic waste as a sustainable and cost-effective construction material. The study focuses on manufacturing pavers and bricks using recycled plastic and partially replacing concrete with plastic alternatives. Initial results found that pavers and bricks made from recycled plastic demonstrate comparable strength and durability to traditional materials while providing environmental and cost benefits. Additionally, preliminary research indicates incorporating plastic waste as a partial concrete replacement significantly reduces construction costs without compromising structural integrity. The outcomes suggest adopting plastic waste in construction can address plastic pollution while optimizing costs, promoting more sustainable building practices.
CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECTjpsjournal1
The rivalry between prominent international actors for dominance over Central Asia's hydrocarbon
reserves and the ancient silk trade route, along with China's diplomatic endeavours in the area, has been
referred to as the "New Great Game." This research centres on the power struggle, considering
geopolitical, geostrategic, and geoeconomic variables. Topics including trade, political hegemony, oil
politics, and conventional and nontraditional security are all explored and explained by the researcher.
Using Mackinder's Heartland, Spykman Rimland, and Hegemonic Stability theories, examines China's role
in Central Asia. This study adheres to the empirical epistemological method and has taken care of
objectivity. This study analyze primary and secondary research documents critically to elaborate role of
china’s geo economic outreach in central Asian countries and its future prospect. China is thriving in trade,
pipeline politics, and winning states, according to this study, thanks to important instruments like the
Shanghai Cooperation Organisation and the Belt and Road Economic Initiative. According to this study,
China is seeing significant success in commerce, pipeline politics, and gaining influence on other
governments. This success may be attributed to the effective utilisation of key tools such as the Shanghai
Cooperation Organisation and the Belt and Road Economic Initiative.
KuberTENes Birthday Bash Guadalajara - K8sGPT first impressionsVictor Morales
K8sGPT is a tool that analyzes and diagnoses Kubernetes clusters. This presentation was used to share the requirements and dependencies to deploy K8sGPT in a local environment.
DEEP LEARNING FOR SMART GRID INTRUSION DETECTION: A HYBRID CNN-LSTM-BASED MODELgerogepatton
As digital technology becomes more deeply embedded in power systems, protecting the communication
networks of Smart Grids (SG) has emerged as a critical concern. Distributed Network Protocol 3 (DNP3)
represents a multi-tiered application layer protocol extensively utilized in Supervisory Control and Data
Acquisition (SCADA)-based smart grids to facilitate real-time data gathering and control functionalities.
Robust Intrusion Detection Systems (IDS) are necessary for early threat detection and mitigation because
of the interconnection of these networks, which makes them vulnerable to a variety of cyberattacks. To
solve this issue, this paper develops a hybrid Deep Learning (DL) model specifically designed for intrusion
detection in smart grids. The proposed approach is a combination of the Convolutional Neural Network
(CNN) and the Long-Short-Term Memory algorithms (LSTM). We employed a recent intrusion detection
dataset (DNP3), which focuses on unauthorized commands and Denial of Service (DoS) cyberattacks, to
train and test our model. The results of our experiments show that our CNN-LSTM method is much better
at finding smart grid intrusions than other deep learning algorithms used for classification. In addition,
our proposed approach improves accuracy, precision, recall, and F1 score, achieving a high detection
accuracy rate of 99.50%.
Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
A review on techniques and modelling methodologies used for checking electrom...nooriasukmaningtyas
The proper function of the integrated circuit (IC) in an inhibiting electromagnetic environment has always been a serious concern throughout the decades of revolution in the world of electronics, from disjunct devices to today’s integrated circuit technology, where billions of transistors are combined on a single chip. The automotive industry and smart vehicles in particular, are confronting design issues such as being prone to electromagnetic interference (EMI). Electronic control devices calculate incorrect outputs because of EMI and sensors give misleading values which can prove fatal in case of automotives. In this paper, the authors have non exhaustively tried to review research work concerned with the investigation of EMI in ICs and prediction of this EMI using various modelling methodologies and measurement setups.
Embedded machine learning-based road conditions and driving behavior monitoringIJECEIAES
Car accident rates have increased in recent years, resulting in losses in human lives, properties, and other financial costs. An embedded machine learning-based system is developed to address this critical issue. The system can monitor road conditions, detect driving patterns, and identify aggressive driving behaviors. The system is based on neural networks trained on a comprehensive dataset of driving events, driving styles, and road conditions. The system effectively detects potential risks and helps mitigate the frequency and impact of accidents. The primary goal is to ensure the safety of drivers and vehicles. Collecting data involved gathering information on three key road events: normal street and normal drive, speed bumps, circular yellow speed bumps, and three aggressive driving actions: sudden start, sudden stop, and sudden entry. The gathered data is processed and analyzed using a machine learning system designed for limited power and memory devices. The developed system resulted in 91.9% accuracy, 93.6% precision, and 92% recall. The achieved inference time on an Arduino Nano 33 BLE Sense with a 32-bit CPU running at 64 MHz is 34 ms and requires 2.6 kB peak RAM and 139.9 kB program flash memory, making it suitable for resource-constrained embedded systems.
6th International Conference on Machine Learning & Applications (CMLA 2024)ClaraZara1
6th International Conference on Machine Learning & Applications (CMLA 2024) will provide an excellent international forum for sharing knowledge and results in theory, methodology and applications of on Machine Learning & Applications.