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.
this is useful for peoples interested in power quality problems and their mitigation. it provides causes, effects of voltage sag and their mitigation techniques.
Improvement of power quality has to be treated as a matter of at most importance in the open
market economy due to the increased use of non linear loads. Several devices have been used to mitigate
the power quality problems. Now a days researchers are concentrating on the use of FACT devices to
overcome power quality issues. Unified Power Quality Conditioner is one among such FACT devices upon
which this paper has concentrated for mitigating the Power Quality problems. Here a 3 phase 3 wire
UPQC is realised using MATLAB/SIMULINK to mitigate voltage sag and swell as well as to maintain
sinusoidal voltage and current at PCC irrespective of load dynamics.
DESIGN AND MODELLING OF STANDALONE HYBRID POWER SYSTEM WITH MATLAB/SIMULINKMichael George
This paper presents a standalone hybrid power system using wind/PV/diesel/Battery energy system with Matlab/Simulink environment. PV & Wind are the primary power sources of the system and battery is used as a backup for long run application. Here we have also compare the performance of PV/Wind/Battery connected system with PV/Wind/Diesel connected hybrid power system. The most frequently used renewable energy sources are those consisting of PV module and/or wind Turbine with/or Diesel generator, and some energy storage or backup system.
this is useful for peoples interested in power quality problems and their mitigation. it provides causes, effects of voltage sag and their mitigation techniques.
Improvement of power quality has to be treated as a matter of at most importance in the open
market economy due to the increased use of non linear loads. Several devices have been used to mitigate
the power quality problems. Now a days researchers are concentrating on the use of FACT devices to
overcome power quality issues. Unified Power Quality Conditioner is one among such FACT devices upon
which this paper has concentrated for mitigating the Power Quality problems. Here a 3 phase 3 wire
UPQC is realised using MATLAB/SIMULINK to mitigate voltage sag and swell as well as to maintain
sinusoidal voltage and current at PCC irrespective of load dynamics.
DESIGN AND MODELLING OF STANDALONE HYBRID POWER SYSTEM WITH MATLAB/SIMULINKMichael George
This paper presents a standalone hybrid power system using wind/PV/diesel/Battery energy system with Matlab/Simulink environment. PV & Wind are the primary power sources of the system and battery is used as a backup for long run application. Here we have also compare the performance of PV/Wind/Battery connected system with PV/Wind/Diesel connected hybrid power system. The most frequently used renewable energy sources are those consisting of PV module and/or wind Turbine with/or Diesel generator, and some energy storage or backup system.
Power factor improvement is the essence of any power sector for realible operations. This report provides literature study of a fixed capacitor thyristor controlled reactor type of power factor compensator by matlab simulation and implementation in programmed microcontroller. To retaining power factor closed to unity under various load condition the arduino ATmega8 microcontroller is used which is programmed by keil software. The simulation is done using proteus software which display power factor according to the variation in load whenever a capacitive load is connected to the transmission line, a shunt reactor is connected which injects lagging reactive VARs to the power system. This report also includes the matlab simulation for three phase power factor improvement by using fixed capacitor thyristor controlled reactor. As a
result the power factor is improved. The results given in this report provides
suitable matlab simulation and proteus simulation based reactor power compensation and power factor improvement and techniques using a FCTCR.
This PPT was crate for my seminar presentation and upload for help and providing information about FAULT ANALYSIS IN HVDC & HVAC TRANSMISSION LINE and basic idea of HVDC System
Power Quality is a combination of Voltage profile, Frequency profile, Harmonics contain and reliability of power supply.
The Power Quality is defined as the degree to which the power supply approaches the ideal case of stable, uninterrupted, zero distortion and disturbance free supply.
Distribution System Voltage Drop and Power Loss CalculationAmeen San
Distribution System Voltage Drop and Power Loss
Calculation
Comparison of Overhead Versus Underground System
Power Loss Calculation,Voltage Drop Calculation
A flywheel, in essence is a mechanical battery - simply a mass rotating about an axis.Flywheels store energy mechanically in the form of kinetic energy.They take an electrical input to accelerate the rotor up to speed by using the built-in motor, and return the electrical energy by using this same motor as a generator.Flywheels are one of the most promising technologies for replacing conventional lead acid batteries as energy storage systems.
DSTATCOM IS USED IN DISTRIBUTION SYSTEM TO IMPROVE POWER QUALITY LIKE PF CORRECTION,VOLTAGE SAG OR SWELL,HARMONICS ELEMINATION,ETC.VARIOUS CONTROL STRATEGY COMPARISION FOR DSTATCOM.ADVANTAGES AND DISADVANTAGES OF DSTATCOM.APPLICATION OF STASTCOM IN INDIA.
The electricity supply industry is undergoing a profound transformation worldwide. Market forces, scarcer natural resources, and an ever-increasing demand for electricity are some of the drivers responsible for such unprecedented change. Against this background of rapid evolution, the expansion programs of many utilities are being thwarted by a variety of well-founded, environment, land-use, and regulatory pressures that prevent the licensing and building of new transmission lines and electricity generating plants.
Reducing the Number Of Transistors In Carry Select Adderpaperpublications3
Abstract: In existing method CMOS logic involved in carry select adder (CSLA), the data dependencies and redundant logic operations are analyzed and then reduced. The carry select (CS) operation is arranged before the calculation of-final-sum, which varies from the earlier methods. But the method is not much more efficient due to power consumption is high. This paper shows the comparison of CMOS logic design and modified Gate Diffusion Input logic (Mod-GDI) and proved Mod-GDI logic is more power-efficient than Gate Diffusion Input logic (GDI), Pass Transistor Logic (PTL) and CMOS logic design in CSLA. Basic GDI logic suffers from some limitations like swing degradation, fabrication difficulty in standard CMOS process and bulk connections. These limitations can be overcome by Mod- GDI. In the proposed scheme, Mod-GDI is better than GDI and CMOS in the maximum cases with respect to area, speed, and power dissipation, and power-delay products. From the simulation results, 45% reduction in power-delay product in Mod-GDI logic in CSLA is obtained. Mod-GDI technique performs varies logic functions by using two transistors. Mod-GDI logic is suitable for designing high speed and less power consumption with reduced number of transistors. Finally, we compare the power consumption and time delay of the existing method with our proposed scheme to show our achievement on accuracy.
Peak to Average Power Ratio (PAPR) Reduction in OFDM-OQAM Signalspaperpublications3
Abstract: The Orthogonal Frequency Division Multiplexing (OFDM) is a type of modulation that is being used for many of the latest wireless, telecommunication and broadcasting standards. OFDM is considered to be complicated than other signals but also it possess high data rate transmissions with relatively wide bandwidths. The major disadvantage included in OFDM signal is Peak-to-Average Power Ratio (PAPR) in higher level and Sensitive to Carrier offset. Hence there were found to be many reduction techniques for PAPR have been proposed where in need to reduction in high PAPR and carrier sensitivity still more to make it efficient for future optical domain standards. This paper not only makes the OFDM system advantageous but also suitable for fast data transmission and reduces the complication at receiver side, because all the transmitting data are cleared out of signal noise, interferences, etc. The technique which is going to get implemented for PAPR reduction is Optimized Iterative Clipping and Filtering (OICF).The OFDM is provided with the subcarrier of N=256 and the modulation of Offset Quadrature Amplitude Modulation (OQAM). The OQAM-OFDM provides the higher spectral efficiency and also the inter-symbol interference is avoided since not using Cyclic Prefix (CP) in OQAM-OFDM signal. The main reason for reducing PAPR is that to avoid non- linearity at the receiving end in high speed wireless communication.
Power factor improvement is the essence of any power sector for realible operations. This report provides literature study of a fixed capacitor thyristor controlled reactor type of power factor compensator by matlab simulation and implementation in programmed microcontroller. To retaining power factor closed to unity under various load condition the arduino ATmega8 microcontroller is used which is programmed by keil software. The simulation is done using proteus software which display power factor according to the variation in load whenever a capacitive load is connected to the transmission line, a shunt reactor is connected which injects lagging reactive VARs to the power system. This report also includes the matlab simulation for three phase power factor improvement by using fixed capacitor thyristor controlled reactor. As a
result the power factor is improved. The results given in this report provides
suitable matlab simulation and proteus simulation based reactor power compensation and power factor improvement and techniques using a FCTCR.
This PPT was crate for my seminar presentation and upload for help and providing information about FAULT ANALYSIS IN HVDC & HVAC TRANSMISSION LINE and basic idea of HVDC System
Power Quality is a combination of Voltage profile, Frequency profile, Harmonics contain and reliability of power supply.
The Power Quality is defined as the degree to which the power supply approaches the ideal case of stable, uninterrupted, zero distortion and disturbance free supply.
Distribution System Voltage Drop and Power Loss CalculationAmeen San
Distribution System Voltage Drop and Power Loss
Calculation
Comparison of Overhead Versus Underground System
Power Loss Calculation,Voltage Drop Calculation
A flywheel, in essence is a mechanical battery - simply a mass rotating about an axis.Flywheels store energy mechanically in the form of kinetic energy.They take an electrical input to accelerate the rotor up to speed by using the built-in motor, and return the electrical energy by using this same motor as a generator.Flywheels are one of the most promising technologies for replacing conventional lead acid batteries as energy storage systems.
DSTATCOM IS USED IN DISTRIBUTION SYSTEM TO IMPROVE POWER QUALITY LIKE PF CORRECTION,VOLTAGE SAG OR SWELL,HARMONICS ELEMINATION,ETC.VARIOUS CONTROL STRATEGY COMPARISION FOR DSTATCOM.ADVANTAGES AND DISADVANTAGES OF DSTATCOM.APPLICATION OF STASTCOM IN INDIA.
The electricity supply industry is undergoing a profound transformation worldwide. Market forces, scarcer natural resources, and an ever-increasing demand for electricity are some of the drivers responsible for such unprecedented change. Against this background of rapid evolution, the expansion programs of many utilities are being thwarted by a variety of well-founded, environment, land-use, and regulatory pressures that prevent the licensing and building of new transmission lines and electricity generating plants.
Reducing the Number Of Transistors In Carry Select Adderpaperpublications3
Abstract: In existing method CMOS logic involved in carry select adder (CSLA), the data dependencies and redundant logic operations are analyzed and then reduced. The carry select (CS) operation is arranged before the calculation of-final-sum, which varies from the earlier methods. But the method is not much more efficient due to power consumption is high. This paper shows the comparison of CMOS logic design and modified Gate Diffusion Input logic (Mod-GDI) and proved Mod-GDI logic is more power-efficient than Gate Diffusion Input logic (GDI), Pass Transistor Logic (PTL) and CMOS logic design in CSLA. Basic GDI logic suffers from some limitations like swing degradation, fabrication difficulty in standard CMOS process and bulk connections. These limitations can be overcome by Mod- GDI. In the proposed scheme, Mod-GDI is better than GDI and CMOS in the maximum cases with respect to area, speed, and power dissipation, and power-delay products. From the simulation results, 45% reduction in power-delay product in Mod-GDI logic in CSLA is obtained. Mod-GDI technique performs varies logic functions by using two transistors. Mod-GDI logic is suitable for designing high speed and less power consumption with reduced number of transistors. Finally, we compare the power consumption and time delay of the existing method with our proposed scheme to show our achievement on accuracy.
Peak to Average Power Ratio (PAPR) Reduction in OFDM-OQAM Signalspaperpublications3
Abstract: The Orthogonal Frequency Division Multiplexing (OFDM) is a type of modulation that is being used for many of the latest wireless, telecommunication and broadcasting standards. OFDM is considered to be complicated than other signals but also it possess high data rate transmissions with relatively wide bandwidths. The major disadvantage included in OFDM signal is Peak-to-Average Power Ratio (PAPR) in higher level and Sensitive to Carrier offset. Hence there were found to be many reduction techniques for PAPR have been proposed where in need to reduction in high PAPR and carrier sensitivity still more to make it efficient for future optical domain standards. This paper not only makes the OFDM system advantageous but also suitable for fast data transmission and reduces the complication at receiver side, because all the transmitting data are cleared out of signal noise, interferences, etc. The technique which is going to get implemented for PAPR reduction is Optimized Iterative Clipping and Filtering (OICF).The OFDM is provided with the subcarrier of N=256 and the modulation of Offset Quadrature Amplitude Modulation (OQAM). The OQAM-OFDM provides the higher spectral efficiency and also the inter-symbol interference is avoided since not using Cyclic Prefix (CP) in OQAM-OFDM signal. The main reason for reducing PAPR is that to avoid non- linearity at the receiving end in high speed wireless communication.
LPC2138 Based Temperature Compensated Ultrasonic Ranging For Blind Personpaperpublications3
Abstract: This paper is intended to provide a theoretical model of object detection and real time assistance via Global Positioning System (GPS).This paper aims at the development of an Electronic Travelling Aid (ETA) kit to help the blind people to find obstacle free path. This ETA is fixed to the stick of the blind people. When the object is detected near to the blinds’ stick it alerts them with the help of vibratory circuit. Ultrasonic sensors are used to evaluate distance of the objects around the blind person to guide the user towards the secure and available path. Output is in the form of vibrations which the blind person can easily recognize. The hardware of entire system contains ARM7 (LPC2138), temperature sensor, ultrasonic sensors and mobile vibrator, Global positioning system (GPS) module and Global System for Mobile (GSM) module. It contains temperature compensation method to reduce the error in measurement of distance using ultrasonic sensors.
Extraction of Features from Fundus Images for Diabetes Detectionpaperpublications3
Abstract: Diabetes is a quickly increasing worldwide problem which is produced by defective organic process of glucose secretion that produces long-term dis-function and harmful for different organs. The major problem of diabetes is diabetic retinopathy (DR), which are vascular diseases affecting the retina due to long time diabetes. It can produce sudden vision loss due to DR. So we need to develop the system to examine the retinal images for obtain important features of diabetic retinopathy by using the image processing techniques. First the entire image is segmented. From that segmented regions, we can check varying changes in blood vessels and different features for e.g. exudates, microaneurysms, and also a set of features such as color, size, edge and texture which can be used as part of an automatic diabetes recognition system.
Abstract: Design verification is an essential step in the development of any product. It ensures that the product as designed is the same as the product as intended. Software simulation is the common approach for validating hardware design unfortunately, it will take hours together to execute. Difficulties in validation arise due to the complexity of the design and also due to the lack of on chip observability. One common solution to this problem is to instrument the prototype using trace-buffers to record a subset of internal signals into on-chip memory for subsequent analysis. In the proposed system, an example circuit is implemented to perform the tracing operation and various trace buffers are designed to record the different stages of internal signal states. The resulting signal states are to be stored, like a error outputs. Low power methodologies are also implemented to achieve low power consumption. Thus the errors are separately stored in the memory for analyzing the signals. This might be used for changes in the logic wherever needed. Thus this tracing is performed to monitor signal states of an FPGA.
Enhancement of Voltage Stability on IEEE 14 Bus Systems Using Static Var Comp...paperpublications3
Abstract: This paper investigates the effects of Static Var Compensator (SVC) on voltage stability of a power system. One of the major causes of voltage instability is the reactive power limit of the system. Improving the system’s reactive power handling capacity via Flexible AC transmission system (FACTS) devices is a remedy for prevention of voltage instability and hence voltage collapse. The effects of Static Var Compensator (SVC) in static voltage stability margin enhancement will be studies. Prediction of the stability margin or distance to voltage collapse is based on the reactive power load demand. The load is connected to several selected buses. The analysis is performed for IEEE 14 Bus system. Then, the most critical mode is identified for each system. IEEE standard test system has been considered and Load flows were computed by using Newton Raphson method with the help of MATLAB and a weak bus is identified.
DC Motor Speed Control for a Plant Based On PID Controllerpaperpublications3
Abstract: This paper aims is to design a controller for controlling the speed of DC motor .The effects of the controller on motor speed is analyzed .Automatic tuning of the controller is also introduce for efficient control of the process .The tuning is implemented using Ziegler Nichols method and results are compared with Variation in speed without controller.
Abstract: Renewable energy source (RES) is applicable in most cases. Among different RES like wind, solar, biomass, hydro, etc. Wind energy is the most available and utilizable one. Wind energy is used for electric power generation. With respect to wind energy stabilization is one issue.
Integrating wind energy with power system requires the application of power electronics devices and controllers. These devices help to improve the quality of power generated. Wind energy is one of the most available and utilizable forms of renewable energy. There has been an extensive growth in the utilization of wind energy in recent years. Among the different renewable energy sources, wind energy has emerged as the most possible source of electrical power. The grouping of wind energy into existing power system presents a practical challenges and that requires indication of voltage stability, regulation, power quality problems, etc. So renewable energy resources (RES) are being connected to the distribution systems, mostly done by use of power electronic converters.
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.
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.
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.
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.
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
Analysis of Total Harmonic Distortion (THD) Level of Distribution Network Usi...IJERA Editor
The modern sensitive, Non-linear and sophisticated load affects the power quality. Dynamic Voltage Restorer (DVR) provides the fast, flexible and efficient solution to improve the power quality for such distribution network [8]. The active power, reactive power, variation of voltage, flicker, harmonics, and electrical behavior of switching operations are the major source of affecting power quality. The intent of this paper is to demonstrate the improvements obtained with DVR in power system network using MATLAB/SIMULINK. In this paper, an overview of the DVR, its functions, configurations, components, control strategies are reviewed. The Simulation results are presented to illustrate the performance of DVR in Total Harmonic Distortion (THD). The results showed clearly the performance of using DVR in improving THD level.
The International Journal of Engineering and Science (The IJES)theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
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.
Compensation of Single-Phase and Three-Phase Voltage Sag and Swell Using Dyna...IJAPEJOURNAL
DVR is a equipment which was connected in series and adjusting the loading voltage by feeding the voltage in system. The first installation was in 1996. usually DVR installed between sensitive loads feeder and source in distribution system .The main duty, fast support load voltage (by fast detection algorithm) during disturbance to avoid any disconnection. in this paper approaches to compensate for voltage sag and swell as a common disturbance in voltage transmission and distribution networks is presented. A dynamic voltage restorer based on the dq0 algorithm for three-phase and dynamic voltage restorer based on the average detection method for single-phase are discussed, also in this paper we compare the two methods used to compensate the single-phase and three-phase process. result of three-phase and single-phase voltage sag and swell simulation has been presented by MATLAB/SIMULINK.
Similar to Simulation and Comparison of DVR and DSTATCOM Used for voltage sag mitigation at Distribution Side (20)
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
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.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
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.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
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Simulation and Comparison of DVR and DSTATCOM Used for voltage sag mitigation at Distribution Side
1. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 2, Issue 2, pp: (197-205), Month: April 2015 - June 2015, Available at: www.paperpublications.org
Page | 197
Paper Publications
Simulation and Comparison of DVR and
DSTATCOM Used For Voltage Sag Mitigation
at Distribution Side
1
Jaykant Vishwakarma, 2
Dr. Arvind Kumar Sharma
1
PG Student, High voltage and Power system, Jabalpur Engineering College, Jabalpur (M.P), India
2
Associate Professor & Head of Department, Electrical Engineering Department, Jabalpur Engineering College,
Jabalpur (M.P), India
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.
Keywords: Power Quality, DVR, DSTATCOM, Voltage Sag, VSI, MATLAB/SIMULINK.
I. INTRODUCTION
Power distribution systems, ideally, should provide their customers with an uninterrupted flow of energy at smooth
sinusoidal voltage at the contracted magnitude level and frequency [1] however, in practice, power systems, especially the
distribution systems, have numerous nonlinear loads, which significantly affect the quality of power supplies. As a result
of the nonlinear loads, the purity of the waveform of supplies is lost. This ends up producing many power quality
problems [2]. Power quality phenomenon or power quality disturbance can be defined as the deviation of the voltage and
the current from its ideal waveform. Faults at either the transmission or distribution level may cause voltage sag or swell
in the entire system or a large part of it. Also, under heavy heavy load conditions, a significant voltage drop may occur in
the system. Voltage sag and swell [2] can cause sensitive equipment to fail, shutdown and create a large current
unbalance. These effects can incur a lot of expensive from the customer and cause equipment damage [1].
Two types of VSI-based compensators have been commonly used for mitigation of the voltage sags and swells and
regulating the load voltage [5]. The first one is a shunt device, which is commonly called DSTATCOM [9]–[11], and the
second one is a series device, which is commonly called DVR [5]. In [4] and [11], these compensators can address other
PQ issues, such as load voltage harmonics, source current harmonics, unbalancing, etc., under steady state to obtain more
2. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 2, Issue 2, pp: (197-205), Month: April 2015 - June 2015, Available at: www.paperpublications.org
Page | 198
Paper Publications
benefits out of their continuous operation. There have been a variety of control strategies proposed for load voltage
control using the aforementioned two devices. For DSTATCOM, this includes reactive power compensation [9] and
voltage-control mode operation of DSTATCOM [10]. For DVR, it includes open-loop and closed-loop load voltage-
control methods [5].
The closed-loop voltage-control mode operation of the two devices is considered best from the point of view of precise
and fast control against sudden variations in the supply voltage and the load [9]. In this paper, the performance of the
DSTATCOM and the DVR used for the load bus voltage control have been analyzed and compared when power quality
problems occur in the distribution system across the load bus. Both of these compensators are used under closed-loop
voltage-control mode.
II. VOLTAGE SOURCE INVERTER
A voltage-source inverter is a power electronic device, which can produce a sinusoidal voltage with any required
magnitude, frequency and phase angle. The VSI is used to either completely replace the voltage or to inject the „missing
voltage‟. The „missing voltage‟ is the difference between the nominal voltage and the actual. The converter is normally
based on some kind of energy storage, which will supply the inverter with a DC voltage. A widely used method is the two
level or multilevel three-phase converters which shares a dc capacitor between all phases. The purpose of this capacitor is
mainly to absorb harmonic ripple and hence it has a relatively small energy storage requirement, particularly when
operating in balanced conditions. The size of this capacitor has to be increased if needed to provide voltage support in
unbalanced conditions. The solid-state electronics device i.e. MOSFET, GTO, IGBT etc. in the inverter is then switched
to get the desired output voltage. IGBT is a three terminal controllable switch that combines the fast switching times of
the MOSFET with the high voltage capabilities of the GTO used as a switching device in VSI. Normally the VSI is not
only used for voltage dip mitigation, but also for other power quality issues, e.g. flicker and harmonics. The VSI
connected in shunt with the ac system provides a multifunctional topology which can be used for up to three quite distinct
purposes:
1. Voltage regulation and compensation of reactive power
2. Correction of power factor; and
3. Elimination of line harmonics.
III. CONTROLLER ALGORITHM
The aim of the control scheme is to maintain constant voltage magnitude at the point where a sensitive load is connected,
under system disturbances. The control system only measures the r.m.s voltage at the load point i.e. no reactive power
measurements are required. The VSI switching strategy is based on a PWM technique which offers simplicity and good
response also PWM is used to vary the amplitude and the phase angle of the injected voltage. Since custom power is a
relatively low-power application, PWM methods offer a more flexible option than the Fundamental Frequency Switching
(FFS) methods favored in FACTS applications. Besides, high switching frequencies can be used to improve on the
efficiency of the converter, without incurring significant switching losses.
There are several ways to control the DVR. Different parts of the controls include.
• identify the occurrence of sag / swell in the system.
• Calculate the offset voltage.
• Pulse output of the PWM inverter fire and stop it when the problem is resolved.
In normal and synchronous conditions, the voltage is a constant, d-voltage is one pu and q-voltage unit is zero pu, but in
normal circumstances can be a change. The d-voltage and q-voltage with the interest that needed for best performance is
compared then the d and q error is generated. Thus the d-q contents of error become abc content. Choose to provide dq0
method, give information about the size (d), phase shift (q) with start and end voltage fallen leaves. Load voltages base on
the Park transformations, and according to the following equation becomes.
3. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
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Page | 199
Paper Publications
Vd = 2/3*[Va*sin(wt) + Vb*sin(wt-2pi/3) + Vc*sin(wt+2pi/3)]
Vq = 2/3*[Va*cos(wt) + Vb*cos(wt-2pi/3) + Vc*cos(wt+2pi/3)]
V0 = 1/3*[Va + Vb + Vc ]
And according inverse Parks Transformation
Va = [Vd*(wt) + Vq*cos(wt) + Vo ]
Vb = [Vd*sin(wt-2pi/3) + Vq*cos(wt-2pi/3) + Vo)
Vc = [Vd*sin(wt+2pi/3) + Vq*cos(wt+2pi/3) + Vo)
where w= rotation speed (rad/s) of the rotating frame.
Main voltages used as a Phase lock loop (PLL) to generate sine-wave single phase. The contents are used for production
abc three phases PWM pulses. Control technique employed throughout this paper is shown below in Figure
Figure 1 Schematic diagrams of control block.
A. Dynamic Voltage Restorer:
DVR is a recently proposed series connected solid state device that injects voltage into the system in order to regulate the
load side voltage. It is normally installed in a distribution system between the supply and critical load feeder [6] as shown
in Figure-2. Usually the connection is made via a transformer, but configurations with direct connection via power
electronics also exist. The resulting voltage at the load bus bar equals to the sum of the grid voltage and the injected
voltage from the DVR. The converter generates the reactive power needed while the active power is taken from the
energy storage. The energy storage can be different depending on the needs of compensating. The DVR often has
limitations on the depth and duration of the voltage dip that can compensate [8].
Figure 2 DVR series connected topology
4. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 2, Issue 2, pp: (197-205), Month: April 2015 - June 2015, Available at: www.paperpublications.org
Page | 200
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The compensation for voltage sags using a DVR can be performed by injecting/absorbing reactive power or real power.
When the injected voltage is in quadrature with the current at the fundamental frequency, compensation is achieved by
injecting reactive power and the DVR itself is capable of generating the reactive power because DVR is self-supported
with dc bus. But, DVR voltage can be kept in quadrature with the current only up to a certain value of voltage sag and
beyond which the quadrature relationship cannot be maintained to correct the voltage sag i.e. if the injected voltage is in
phase with the current, DVR injects real power and hence an energy storage device is required at the dc side of VSI. The
control technique adopted should consider the limitations such as the voltage injection capability (inverter and transformer
rating) and optimization of the size of energy storage [4].
B. Distribution Static Compensator:
A Distribution-STATCOM consists of a two-level VSI, a dc energy storage device, a coupling transformer connected in
shunt to the distribution network through a coupling transformer as shown in Figure-3. The VSI converts the dc voltage
across the storage device into a set of three-phase ac output voltages. These voltages are in phase and coupled with the ac
system through the reactance of the coupling transformer. Suitable adjustment of the phase and magnitude of the
DSTATCOM output voltages allows effective control of active and reactive power exchanges between the DSTATCOM
and the ac system. Such configuration allows the device to absorb or generate controllable active and reactive power.
Fig-3: Schematic Diagram of DSTATCOM
IV. MATLAB MODELING AND SIMULATION
A. MATLAB Model of Uncompensated System:
A Distribution system is modeled and simulated using the MATLAB. The model is shown in Figure-4. The three-phase
source of 220 KV is connected to step down transformer (220 kv/11kv) and secondary of transformer (11kv) is connected
to pi section of length 21 km and a three phase load is also connected through a load bus.
A fault is applied at the distribution line and then analyzes system through scope showing voltage magnitude in per unit
system.
Figure 4 MATLAB model of DSTATCOM connected system
5. ISSN 2349-7815
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B. MATLAB Model of DVR:
The DVR is modeled and simulated using the MATLAB and its Simulink and Sim Power System toolboxes. The
MATLAB model of the DVR connected system [4] is shown in Figure-5. DVR consists of a PWM inverter circuit and a
DC Voltage source connected at the DC Link of VSI. The IGBT based PWM VSI is modeled using Universal Bridge
Block from Power Electronics subset of Power System Block-set. The considered load is a lagging power factor load.
Figure 5 MATLAB model of DVR connected system
C. MATLAB Model of DSTATCOM:
A Distribution-STATCOM is used to regulate voltage on a 11-kV distribution network. A feeders (21 km) transmit power
to loads connected at buse B2
Figure 6 MATLAB model of DSTATCOM connected system
6. ISSN 2349-7815
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The D-STATCOM regulates bus B3 voltage by absorbing or generating reactive power. This reactive power transfer is
done through the leakage reactance of the coupling transformer by generating a secondary voltage in phase with the
primary voltage (network side). This voltage is provided by a voltage-sourced PWM inverter. When the secondary
voltage is lower than the bus voltage, the D-STATCOM acts like an inductance absorbing reactive power. When the
secondary voltage is higher than the bus voltage, the DSTATCOM acts like a capacitor generating reactive power.
V. RESULT AND DISCUSSION
A. Simulation Result of Uncompensated System during fault:
In simulation of uncompensated system when a three–phase short-circuit fault is applied at point A,during the period 200
ms. The voltage sag at the load point is almost 80% with respect to the reference voltage.
Fig.-7 Source Voltage waveform during Fault with Uncompensated system
B. Simulation Resultl of DVR during Fault:
Now simulate system with using DVR at point A where three–phase short-circuit fault has been applied. The voltage sag
at the load point isnow become almost 90% with respect to the reference voltage. Using the facilities available in
MATLAB the DVR is simulated to be in operation only for the duration of the fault.
Fig.-8 Source Voltage waveform before Fault mitigation without DVR
7. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 2, Issue 2, pp: (197-205), Month: April 2015 - June 2015, Available at: www.paperpublications.org
Page | 203
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C. Simulation Result of DSTATCOM during Fault:
Now simulate system with using DSTATCOM at point A where three–phase short-circuit fault has been applied. The
voltage sag at the load point is now become almost 80% with respect to the reference voltage. Using the facilities
available in MATLAB the DSTATCOM is simulated to be in operation only for the duration of the fault.
Figure 9 Source Voltage waveform before Fault mitigation without DSTATCOM
From the above result it is theoretically proved that DVR is more significant than DSTATCOM. The simulation graph
helps us to make understand the comparison between them.
• Voltage Improvement
The load side voltage (in p.u.) during a fault condition of DVR and DSTATCOM are presented in this table. From this
table we can see that DVR can deliver marginally greater voltage than DSTATCOM.
Table 1 Voltage Improvement
Voltage Magnitude(p.u.) DSTATCOM DVR
Before compensation 0.2 p.u. 0.2 p.u.
After compensation 0.8 p.u. 0.9 p.u.
improved voltage 0.6 p.u. 0.7 p.u.
• THD Analysis
Total harmonic distortion is an important criterion for power quality improvement. For the basis of presented harmonics
in a power line THD is being calculated. This table created by the help of MATLAB FFT Analysis Result. During a fault
condition THD of load side voltage presented in this table. From this presented table we can see that DVR is much better
than DSTATCOM because the harmonics which is generated in the distribution line eliminated by the help of DVR
system and the load voltage is approximately sinusoidal.
Table 2 THD Analysis
THD DSTATCOM DVR
Before Compensation 5.92 5.92
After Comensation 5.92 3.49
THD analysis of DSTATCOM
8. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 2, Issue 2, pp: (197-205), Month: April 2015 - June 2015, Available at: www.paperpublications.org
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Figure 10 THD analysis of DSTATCOM
THD analysis of DVR
Figure 11 THD analysis of DVR
VI. CONCLUSION
This paper has presented the power quality problems such as voltage dips, swells and interruptions, and mitigation
techniques of custom power electronic devices DVR, D-STATCOM. The design and applications of DVR and D-
STATCOM for voltage sags, interruptions and swells, and comprehensive results are presented.
A new PWM-based control scheme has been implemented to control the electronic valves in the VSI used in the
DSTATCOM and DVR. As opposed to fundamental frequency switching schemes already available in the
MATLAB/SIMULINK, this PWM control scheme only requires voltage measurements. This characteristic makes it
ideally suitable for low-voltage custom power applications. The simulations carried out showed that the DVR provides
relatively better voltage regulation capabilities. It was also observed that the capacity for power compensation and voltage
regulation of DSTATCOM depends on the rating of the dc storage device. The simulation results presented shows good
accuracy with results.
9. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 2, Issue 2, pp: (197-205), Month: April 2015 - June 2015, Available at: www.paperpublications.org
Page | 205
Paper Publications
REFERENCES
[1] M. Bollen, “Understanding Power Quality Problems – Voltage Sags and Interruptions”, IEEE Press Series on Power
Engineering – John Wiley and Sons, Piscataway, USA (2000).
[2] Math H.J. Bollen, Understanding power quality problems: voltage sags and interruptions, IEEE Press, New York,
2000
[3] Performance of DVR under different voltage sag and swell conditions by T. Devaraju, V. C. Reddy and M. Vijaya
Kumar VOL. 5, NO. 10, OCTOBER 2010 ISSN 1819-6608
[4] Mitigation Of Voltage Sags/Swells Using Dynamic Voltage Restorer (DVR) Rosli Omarand and Nasrudin Abd
Rahim VOL. 4, NO. 4, JUNE 2009 ISSN 1819-6608
[5] Power Quality Enhancement Using Custom Power Devices by A. Ghosh and G. Ledwich. 2002. Kluwer Academic
Publishers. ISBN 14020-7180-9
[6] The Effect of DVR Location for Enhancing Voltage Sag by Rohanim Ibrahim, Ahmed M. A. Haidar, Zahim M.,
Herbert Iu
[7] Control of Reduced Rating Dynamic Voltage Restorer with Battery Energy Storage System, by B. Sing, P.
Joyprakash IEEE 2008,978-1-4244-1762-9/08
[8] A novel Control Algorithm for Self Supported Dynamic voltage Restorer(DVR) by Himadri Ghosh, Pradip Kr. Saha
and Goutam Kr. Panda IJSER,vol 3,ISSN 2229-5518
[9] FACTS controllers in power transmission and distribution by K. R. Padiyar ISBN (13) : 978-81-224-2541-3
[10] Modeling, Design and Analysis of Different Controllers for DSTATCOM by Bhim Singh, Senior Member, IEEE,
Alka Adya, A.P.Mittal, Member, IEEE, 0-7803-9525-5/06
[11] Distributed DSTATCOMs for Distribution Line Enhancement by Lasantha B. Perera, Gerard Ledwich and Arindam
Ghosh