Abstract: In present era, power engineers need to plan the power system design in such a way that the system can sustain its Power Quality (PQ) even after facing all the above said problems. Along with that the system should also be compatible with the increasing demand of power supply. Quality of power depends on the system design, reliability and efficiency so study of PQD is important. PQD affects industrial as well as large commercial customers. Voltage sag is also referred as voltage dip. Voltage dip is the term given by IEC while the term "voltage sag" (VS) is used by North American power quality commission. VS creates disturbance in the pure sinusoidal waveform of voltage which in turn deteriorates the power quality of the system. VS occur for very short duration of 0.5 to 30 cycles. It is decrease in RMS voltage of about 90 % to 10 % of nominal voltage. Although VS occurs for very short duration but its effects deteriorates system with time decreases life period of the system. The present work is an attempt to analyse the voltage sag on power distribution network with different transformer connections. The field specifications obtained are used in MATLAB/SIMULINK and the results are discussed.
- This study presents the evaluation and
parametric modeling of voltage drop in power distribution
networks. The issues of voltage drop in power distribution
networks has become a recurrent decimal in power distribution
sector, which has avert effects on electronics appliances, which
result in incessant fire out in offices and residential buildings.
Benin Electricity Distribution Company (BEDC) injection
substation both in Ekpoma and Benin City were investigated for
a period of three months (1ST February to 30TH April, 2014). Data
were obtained from both technical staff and prospect power
consumers in that area with the help of questionnaires. Causes of
various voltages drop in six power distribution injection
substation sectors were obtained from both residential and
industrial areas with the corresponding time (hour).
Mathematical modeling was developed for voltage drop. Firstly,
it was observed from BEDC power system that there were no
technical reports recorded on voltage drop cases and due to lack
of technical record, this aspect has witnessed a low response time
from the technical sector to eradicate. It is observed that voltage
drop occurrences and response time before repairs has similar
exponential pattern, which justify the neglect of voltage drop.
Voltage drop in both residential and industrial areas were
considered
Injection of the wind power into an electric grid affects the power quality. The performance of the wind turbine and thereby power quality are determined on the basis of measurements and the norms followed according to the guideline specified in International Electro-technical Commission standard, IEC-61400. The influence of the wind turbine in the grid system concerning the power quality measurements are-the active power, reactive power, variation of voltage, flicker, harmonics, and electrical behavior of switching operation and these are measured according to national/international guidelines. The paper study demonstrates the power quality problem due to installation of wind turbine with the grid. In this proposed scheme STATic COMpensator (STATCOM) is connected at a point of common coupling with a battery energy storage system (BESS) to mitigate the power quality issues. The battery energy storage is integrated to sustain the real power source under fluctuating wind power. The STATCOM control scheme for the grid connected wind energy generation system for power quality improvement is simulated using MATLAB/SIMULINK in power system block set. The effectiveness of the proposed scheme relives the main supply source from the reactive power demand of the load and the induction generator. The development of the grid co-ordination rule and the scheme for improvement in power quality norms as per IEC-standard on the grid has been presented.
- This study presents the evaluation and
parametric modeling of voltage drop in power distribution
networks. The issues of voltage drop in power distribution
networks has become a recurrent decimal in power distribution
sector, which has avert effects on electronics appliances, which
result in incessant fire out in offices and residential buildings.
Benin Electricity Distribution Company (BEDC) injection
substation both in Ekpoma and Benin City were investigated for
a period of three months (1ST February to 30TH April, 2014). Data
were obtained from both technical staff and prospect power
consumers in that area with the help of questionnaires. Causes of
various voltages drop in six power distribution injection
substation sectors were obtained from both residential and
industrial areas with the corresponding time (hour).
Mathematical modeling was developed for voltage drop. Firstly,
it was observed from BEDC power system that there were no
technical reports recorded on voltage drop cases and due to lack
of technical record, this aspect has witnessed a low response time
from the technical sector to eradicate. It is observed that voltage
drop occurrences and response time before repairs has similar
exponential pattern, which justify the neglect of voltage drop.
Voltage drop in both residential and industrial areas were
considered
Injection of the wind power into an electric grid affects the power quality. The performance of the wind turbine and thereby power quality are determined on the basis of measurements and the norms followed according to the guideline specified in International Electro-technical Commission standard, IEC-61400. The influence of the wind turbine in the grid system concerning the power quality measurements are-the active power, reactive power, variation of voltage, flicker, harmonics, and electrical behavior of switching operation and these are measured according to national/international guidelines. The paper study demonstrates the power quality problem due to installation of wind turbine with the grid. In this proposed scheme STATic COMpensator (STATCOM) is connected at a point of common coupling with a battery energy storage system (BESS) to mitigate the power quality issues. The battery energy storage is integrated to sustain the real power source under fluctuating wind power. The STATCOM control scheme for the grid connected wind energy generation system for power quality improvement is simulated using MATLAB/SIMULINK in power system block set. The effectiveness of the proposed scheme relives the main supply source from the reactive power demand of the load and the induction generator. The development of the grid co-ordination rule and the scheme for improvement in power quality norms as per IEC-standard on the grid has been presented.
Neutral sizing in harmonic-rich installationsLeonardo ENERGY
Both national and international standards for the conductor sizing of cables do not adequately take into account the additional heat load arising from harmonic currents. Some standards prescribe the maximum current values for four-conductor and five-conductor cables under the assumption that only two or three conductors are loaded. However, today’s harmonic situations may give rise to the fourth conductor (neutral) being fully loaded or even overloaded simultaneously with a balanced load on the three phase conductors. Other standards provide a general instruction that under a particular harmonic impact on the phase conductors, a certain additional load has to be taken into account for sizing the neutral conductor. However, the practitioner will usually not know how much harmonic impact arises from a particular load or group of loads.
In the following application note, an approach will be given to estimate the additional thermal impact due to harmonic currents in the LV power supply system of a building. Based on this estimation, it provides a methodology on how to dimension and select three-phase cables that are supposed to feed single-phase final circuits containing distorting loads.
SOLID STATE TRANSFORMER - USING FLYBACK CONVERTERAbhin Mohan
FUTURISTIC ELECTRICAL ENGINEERING PROJECT.
A Device that can step up as well as step down coltage and get output as both DC or AC. Total flexibility of Power using DC link by Flyback Coverter.
Voltage Flicker Analysis and its Mitigation by STATCOM for Power Quality Impr...IJMTST Journal
Voltage flicker is considered as one of the most severe power quality problems (especially in loads like electrical arc furnaces) and much attention has been paid to it lately. The reason for this disturbance is mainly due to the large nonlinear loads such as electric arc furnaces. Due to the latest achievements in the semiconductors industry and consequently the emergence of the compensators based on voltage source converters, FACTS devices have been gradually noticed to be used for voltage flicker compensation. This paper covers the contrasting approaches; dealing with the voltage flicker mitigation in three stages and assessing the related results in details. Initially, the voltage flicker mitigation, using FCTCR (Fixed Capacitor Thyristor Controlled Reactor), was simulated. Secondly, the compensation for the Static Synchronous Compensator (STATCOM) has been performed. The voltage flicker compensation by 8– pulse as well as 12 – pulse static synchronous compensator (STATCOM) has been performed. This paper deals with the voltage flicker mitigation and reduction in total harmonic distortion (THD) and compared the results in detail. The obtained results show that STATCOM is very efficient and effective for the compensation and mitigation of voltage flicker and harmonics all the simulation results have been performed on the MATLAB Software.
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.
Come join the area's leading power quality experts as we demonstrate and replicate common power quality issues, problems and solutions in today's industrial and commercial electrical environments.
In the modern power system the reactive power compensation is one of the main issues, the transmission of active power requires a difference in angular phase between voltages at the sending and receiving points (which is feasible within wide limits), whereas the transmission of reactive power requires a difference in magnitude of these same voltages (which is feasible only within very narrow limits). The reactive power is consumed not only by most of the network elements, but also by most of the consumer loads, so it must be supplied somewhere. If we can't transmit it very easily, then it ought to be generated where it is needed." (Reference Edited by T. J. E. Miller, Forward Page ix).Thus we need to work on the efficient methods by which VAR compensation can be applied easily and we can optimize the modern power system. VAR control technique can provides appropriate placement of compensation devices by which a desirable voltage profile can be achieved and at the same time minimizing the power losses in the system. This report discusses the transmission line requirements for reactive power compensation. In this report thyristor switched capacitor is explained which is a static VAR compensator used for reactive power management in electrical systems.
Seminar Topic For Electrical and Electronics Engineering (EEE)
Abstract: This paper presents an introduction to design a single-stage reluctance coilgun. An equivalent circuit for coilgun is analyzed and equation for current through the coil is derived. Main components while designing the coilgun selection like capacitor, IGBTs, projectile for coil design are discussed in detail and their effect on performance of the coilgun is studied. The circuit is designed for measuring speed of the projectile using IR based sensors.
Abstract: In this paper circuit for coilgun is simulated and analyzed using SIMULINK. Behavior of the magnetic field due to the current carrying coil is analyzed. Also, the effect on the coilgun performance for different weights of projectiles is investigated. The speed profile for different positions of the projectile is observed which is a critical parameter for coilgun operation. A comparison is drawn between the simulated and experimental results.
Neutral sizing in harmonic-rich installationsLeonardo ENERGY
Both national and international standards for the conductor sizing of cables do not adequately take into account the additional heat load arising from harmonic currents. Some standards prescribe the maximum current values for four-conductor and five-conductor cables under the assumption that only two or three conductors are loaded. However, today’s harmonic situations may give rise to the fourth conductor (neutral) being fully loaded or even overloaded simultaneously with a balanced load on the three phase conductors. Other standards provide a general instruction that under a particular harmonic impact on the phase conductors, a certain additional load has to be taken into account for sizing the neutral conductor. However, the practitioner will usually not know how much harmonic impact arises from a particular load or group of loads.
In the following application note, an approach will be given to estimate the additional thermal impact due to harmonic currents in the LV power supply system of a building. Based on this estimation, it provides a methodology on how to dimension and select three-phase cables that are supposed to feed single-phase final circuits containing distorting loads.
SOLID STATE TRANSFORMER - USING FLYBACK CONVERTERAbhin Mohan
FUTURISTIC ELECTRICAL ENGINEERING PROJECT.
A Device that can step up as well as step down coltage and get output as both DC or AC. Total flexibility of Power using DC link by Flyback Coverter.
Voltage Flicker Analysis and its Mitigation by STATCOM for Power Quality Impr...IJMTST Journal
Voltage flicker is considered as one of the most severe power quality problems (especially in loads like electrical arc furnaces) and much attention has been paid to it lately. The reason for this disturbance is mainly due to the large nonlinear loads such as electric arc furnaces. Due to the latest achievements in the semiconductors industry and consequently the emergence of the compensators based on voltage source converters, FACTS devices have been gradually noticed to be used for voltage flicker compensation. This paper covers the contrasting approaches; dealing with the voltage flicker mitigation in three stages and assessing the related results in details. Initially, the voltage flicker mitigation, using FCTCR (Fixed Capacitor Thyristor Controlled Reactor), was simulated. Secondly, the compensation for the Static Synchronous Compensator (STATCOM) has been performed. The voltage flicker compensation by 8– pulse as well as 12 – pulse static synchronous compensator (STATCOM) has been performed. This paper deals with the voltage flicker mitigation and reduction in total harmonic distortion (THD) and compared the results in detail. The obtained results show that STATCOM is very efficient and effective for the compensation and mitigation of voltage flicker and harmonics all the simulation results have been performed on the MATLAB Software.
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.
Come join the area's leading power quality experts as we demonstrate and replicate common power quality issues, problems and solutions in today's industrial and commercial electrical environments.
In the modern power system the reactive power compensation is one of the main issues, the transmission of active power requires a difference in angular phase between voltages at the sending and receiving points (which is feasible within wide limits), whereas the transmission of reactive power requires a difference in magnitude of these same voltages (which is feasible only within very narrow limits). The reactive power is consumed not only by most of the network elements, but also by most of the consumer loads, so it must be supplied somewhere. If we can't transmit it very easily, then it ought to be generated where it is needed." (Reference Edited by T. J. E. Miller, Forward Page ix).Thus we need to work on the efficient methods by which VAR compensation can be applied easily and we can optimize the modern power system. VAR control technique can provides appropriate placement of compensation devices by which a desirable voltage profile can be achieved and at the same time minimizing the power losses in the system. This report discusses the transmission line requirements for reactive power compensation. In this report thyristor switched capacitor is explained which is a static VAR compensator used for reactive power management in electrical systems.
Seminar Topic For Electrical and Electronics Engineering (EEE)
Abstract: This paper presents an introduction to design a single-stage reluctance coilgun. An equivalent circuit for coilgun is analyzed and equation for current through the coil is derived. Main components while designing the coilgun selection like capacitor, IGBTs, projectile for coil design are discussed in detail and their effect on performance of the coilgun is studied. The circuit is designed for measuring speed of the projectile using IR based sensors.
Abstract: In this paper circuit for coilgun is simulated and analyzed using SIMULINK. Behavior of the magnetic field due to the current carrying coil is analyzed. Also, the effect on the coilgun performance for different weights of projectiles is investigated. The speed profile for different positions of the projectile is observed which is a critical parameter for coilgun operation. A comparison is drawn between the simulated and experimental results.
POWER FACTOR IMPROVEMENT OF INDUSTRIAL LOAD BY MATLAB SIMULATIONpaperpublications3
Abstract: It is a framework considering industrial loads for improvement of power factor of industrial load system. Most of loads in industries are inductive in nature and thus having low power factor. Low power factor is highly undesirable and it increases current and also increases losses of active power. This paper discusses how to calculate the correct value of capacitor to improve power factor to overcome above mentioned problems. Because improving power factor will give efficient utilization of electrical power.
Investigating the Feasibility of Solar Wind Hybrid Systems for Off-Grid Rural...paperpublications3
Abstract: The study investigated the viability of using hybrid models of renewable power generation in certain geographical areas where the climate is suitable. A real model of the set-up was created and the data obtained was compared to simulated models to improve accuracy. The data from both the real set-up and the simulated model were then compared to climatic conditions in certain rural areas of India. As of submission of this report, wind is not a prevalent source of energy in the southern Indian state of Karnataka; this project aims to conclude whether such non-utilisation is justified or whether it would be beneficial if such hybrid models be used in certain areas of suitable conditions.
An Overview of Different PWM Techniques to Reduce Total Harmonic Distortion o...paperpublications3
Abstract: There are three types of DC/AC inverters available on the market, which are classified by their output types: (1) in practice, DC/AC conversion is done with topologies of varying precision. It can be as simple as applying voltages of equal magnitude in opposite directions across a load to generate a square wave. It is a square wave inverter. (2) A more precise method of DC/AC conversion is the modified sine wave, which introduces a dead time in a normal square wave output so that higher peak voltage can be used to produce the same average voltage as a sinusoidal wall-outlet output. This method produces fewer harmonics than square wave generation, but it still is not quite the same as the AC power that comes from AC outlet. The harmonics that are still present in a modified sine wave makes this type of inverter unsuitable for use while electrical noise is a concern, such as in medical devices which monitor the vital signs of a human.(3)Pure sine wave DC/AC conversion will introduce the least amount of harmonics into an electrical device, but are also most expensive method. Since the AC sine wave must come from a DC source, switching must still take place. However, switching takes place with logic so that the energy delivered to a load approaches that of a pure sine wave. This means that extra components and design considerations are involved in the control circuitry of a pure sine wave inverter, driving up cost.
In this paper an overview is presented of different PWM techniques to control the output voltage as well as to reduce the total harmonic distortion of output voltage in an H-bridge inverter.
Design of Compensator for Roll Control of Towing Air-Craftspaperpublications3
Abstract: It is a difficult task to make proper adjustment of towing vehicles, keeping the motion secured and predetermined. In older days the control was manual. Now-a-days automatic feedback control systems are used. The specifications are very stringent due to imposition of govt. and industrial rules. There are constraints on steady state accuracy, transient performance and stability margins. The requirements are contradictory. If the steady state accuracy is realized, the transient requirements and the stability margins cannot be maintained. It is difficult to fulfil the requirements by modifying the feedback or adding feed-forward. It is expedient to add a compensator in the forward or feedback path. In this paper, the design of a towing aircraft has been taken up. Its block diagram and transfer function are given. The gain has been fixed up to keep the steady state error within prescribed limits. The transient performance has been shaped and stability ensured by adding a lag compensator of chosen parameters.
Design and Development of DVR model Using Fuzzy Logic Controller for Voltage ...paperpublications3
Abstract:In this paper, A fuzzy logic based DVR model is presented and Modelled with the help of simulink block. Since from inception, fuzzy logic has been utilized in almost all the field but its application is mostly found very efficient in control system engineering. In this work Fuzzy logic controller is designed for DVR (Dynamic Voltage restorer) for mitigating the voltage sag and voltage swell problem. Simulation Result shows the compensation ability of this DVR is very effective.
A Comparative Analysis of MPWM & SPWM Techniques to Reduce Harmonic Distortio...paperpublications3
Abstract: In the modern world, the demand of electricity is increasing day by day. The main reasons of increasing demand are the population, the economy growth and rapid depletion of fossil based energy reserve. Then it must research for an alternative source of power generation. One of the sources is a renewable energy which is not possibly harmful on environment. The need of power rating inverter is required to operate electrical and electronics appliances smoothly. Static UPS are virtually perfect electric generators. They are highly reliable and, by nature, ensure the uninterrupted availability of electric power. As regards electrical characteristics, the inverter (which constitutes the UPS generator) possesses from the point of view of frequency stability as well as voltage stability, performances superior to those of the mains. The only doubtful characteristic is, in the opinion of any engineer, its ability to deliver a sinusoidal voltage regardless of the shape of the current drawn by the load. Most of the available commercial uninterruptible power supplies (UPSs) are actually square wave inverter or quasi square wave inverters. Electronic devices, managed by these inverters will be damaged due to content of harmonics.In this paper a comparative harmonic distortion analysis is presented between and square wave and sine wave i.e. (MSPWM & SPWM) inverters.
A new approach for Reducing Noise in ECG signal employing Gradient Descent Me...paperpublications3
Abstract: ECG is the main tool used by the physicians for identifying and for interpretation of Heart condition. The ECG should be free from noise and of good quality for the correct diagnosis. In real time situations ECG are corrupted by many types of noises. The high frequency noise is one of them. In this thesis, analysis has been carried out the use of neural network for denoising the ECG signal. A multilayer artificial neural network (ANN) is designed. Here gradient descent method (GDM) is used for training of artificial neural network. The noisy ECG signal is given as input to the neural network. The output of neural network is compared with De-noised(original) ECG signal and value of Root Mean Square Error(RMSE) is computed. In training process the weights are updated until the value of RMSE is minimized. Several iteration has to be performed in order to find Minimum Mean Square Error(MMSE). At MMSE network weights are finalized. Subsequently, network parameters are used for Noise reduction. The comparison with other technique shows that the neural networks method is able to better preserve the signal waveform at system output with reduced noise. Our results shows better accuracy in terms of parameters root mean square error, signal to noise ratio and smoothness (RMSE,SNR and R) as compare to GOWT[18].The database has been collected from MIT-BIH arrhythmias database.
A Comparative Study of Various AC-DC Converters for Low Voltage Energy Harves...paperpublications3
Abstract: Electromagnetic microscale and mesoscale power generators with low voltage outputs are now widely used as kinetic energy harvesters. The extrinsic vibrations on the generator can excite the internal oscillations between the proof mass magnet and the electrical damper coils. These oscillations produce a periodically varying magnetic flux in coil, inducing a corresponding AC output voltage. This output can be converted to dc and can be used to supply power to electronic loads. The conventional AC-DC converters for energy harvesting system with diode rectifiers suffer considerable voltage drop resulting increase in power loss of circuitry and complexity. As a remedy various bridgeless boost converters were designed and implemented. Standard H bridge converter with 4 switch or 2 switch, dual polarity boost converters, parallel combination of boost and buck-boost converter, integrated boost and buck-boost combination bridgeless rectifier are some of these. These circuits are studied, simulated and compared. The simulation models are drawn and simulated using MATLAB R2010a.
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.
Sign Language Recognition Using Image Processing For Mute Peoplepaperpublications3
Abstract: Computer recognition of sign language is an important research problem for enabling communication with mute people. This project introduces an efficient and fast algorithm for identification of the number of fingers opened in a gesture representing an alphabet of the Binary Sign Language.
The system does not require the hand to be perfectly aligned to the camera. The project uses image processing system to identify, especially English alphabetic sign language used by the mute people to communicate. The basic objective of this project is to develop a computer based intelligent system that will enable mute people significantly to communicate with all other people using their natural hand gestures.
The idea consisted of designing and building up an intelligent system using image processing, machine learning and artificial intelligence concepts to take visual inputs of sign language’s hand gestures and generate easily recognizable form of outputs.
Hence the objective of this project is to develop an intelligent system which can act as a translator between the sign language and the spoken language dynamically and can make the communication between people with mute and normal people both effective and efficient. The system is we are implementing for Binary sign language but it can detect any sign language with prior image processing.
A Comparative Study of GA tuned and PSO tuned PI Controller Based Speed Contr...paperpublications3
Abstract: This paper presents a comparative study of Generic Algorithm (GA) and Partical Swarm Optimization (PSO) technique for determining the optimal parameters of (PI) controller for speed control of a brushless DC motor (BLDC) where the (BLDC) motor is modeled in simulink in MATLAB. The proposed technique was more efficient in improving the step response characteristics as well as reducing the steady-state error, rise time, settling time and maximum overshoot.
Improved Spider Algorithm for Solving Optimal Reactive Power Dispatch Problempaperpublications3
Abstract: In this paperimproved spider algorithm (ISA) is projected to solve the optimal reactive power dispatch (ORPD) Problem. Stimulated by the societal spiders, we suggest a new Improved Spider Algorithm (ISA) to solve ORPD problem. The structure is chiefly based on the foraging approach of social spiders, which make use of the vibrations spread over the spider web to decide the position of preys. The simulation results demonstrate high-quality performance of ISA in solving an optimal reactive power dispatch problem. The projected algorithm has been tested on IEEE 30 bus system and compared to other specified algorithms. Results show that ISA is more efficient than other algorithms to reduce the real power loss and to enhance the voltage profile index.
A Review over Different Blur Detection Techniques in Image Processingpaperpublications3
Abstract: In last few years there is lot of development and attentions in area of blur detection techniques. The Blur detection techniques are very helpful in real life application and are used in image segmentation, image restoration and image enhancement. Blur detection techniques are used to remove the blur from a blurred region of an image which is due to defocus of a camera or motion of an object. In this literature review we represent some techniques of blur detection such as Blind image de-convolution, Low depth of field, Edge sharpness analysis, and Low directional high frequency energy. After studying all these techniques we have found that there are lot of future work is required for the development of perfect and effective blur detection technique.
The Harmonic Mitigation in Induction Furnace Using Hybrid Filterpaperpublications3
Abstract: In the induction furnace most concern issue are related to power quality, in the system nonlinear load causes current harmonics and induction furnace cause voltage harmonic. The harmonics produced in the system they distorts the fundamental sinusoidal waveform so harmonics must be mitigate. One of the best solutions to mitigate harmonics problems is the use of Hybrid filters. Shunt passive filter is to eliminate harmonics currents. Passive filter has some disadvantages mainly related to the filter frequencies they were previously tuned, fixed compensation, resonance can occur because of the interaction between the passive filter and other load, with undesired results. So to overcome this problems development of active filter is required. Series active filter is suitable for the mitigation of voltage harmonics in this paper we discussed the hybrid scheme having passive filter with tunable element which mitigate current harmonic in between sub order harmonic frequency to particular design order frequency which maintain desired power factor, series active filter with direct control strategies which mitigate voltage harmonic and maintain desired reactive power.
Voltage Stability analysis by using SVC With Fuzzy Logic Controller in Multi ...paperpublications3
Abstract: Power system can be simulated and analyzed based on a mathematical model however; uncertainty still exists due to change of loads and an occurrence of fault. Recently, fuzzy theory highly flexible easily operated and revised, theory is a better choice, especially for a complicated system with many variables. Hence, this work aims to develop a controller based on fuzzy logic to simulate an automatic voltage regulator in transient stability power system analysis. By adding power system stabilizer for tuning of fuzzy logic stabilizing controller there is no need for exact knowledge of power system mathematical model. The fuzzy controller parameters settings are independent due to nonlinear changes in generator and transmission lines operating conditions. Because of that proposed fuzzy controlled power system stabilizer should perform better than the conventional controller. To overcome the drawbacks of conventional power system stabilizer (CPSS), numerous techniques have been proposed in the article. The conventional PSS's effect on the system damping is then compared with a fuzzy logic based PSS while applied to a single machine infinite bus power system.
Fuzzy Logic Controller for Static Synchronous Series Compensator with Line Po...paperpublications3
Abstract: This paper investigates the problem of controlling and modulating power flow in a transmission line using a Synchronous Static Series Compensator (SSSC). The studies, which include detailed PWM techniques controlled for SSSC, are conducted and the control circuits are presented. In this study, a static synchronous series compensator (SSSC) is used to investigate the effect of this device in controlling active and reactive powers as well as damping power system oscillations in transient mode. The SSSC equipped with a source of energy in the DC link can supply or absorb the reactive and active power to or from the line. Simulations have been done in MATLAB/SIMULINK environment. Simulation results obtained for selected bus-2 in two machine power system shows the efficacy of this compensator as one of the FACTS devices member in controlling power flows, achieving the desired value for active and reactive powers, and damping oscillations appropriately.
Small Signal Modelling of a Buck Converter using State Space Averaging for Ma...paperpublications3
Abstract: Nowadays, step-down power converters such as buck scheme are widely employed in a variety of applications such as power supplies, spacecraft power systems, hybrid vehicles and power supplies in particle accelerators. This paper presents a comprehensive small-signal model for the DC-DC buck converter operated under Continuous Conduction Mode (CCM) for a magnetic load. Initially, the buck converter is modeled using state-space average model and dynamic equations, depicting the converter, are derived. The proposed model can be used to design powerful, precise and robust closed loop controller that can satisfy stability and performance conditions of the DC-DC buck regulator. This model can be used in any DC-DC converter (Buck, Boost, and Buck-Boost) by modifying the converter mathematical equations.
Harmonic Distortion Analysis of the Output Voltage in SPWM (Unipolar) Single ...paperpublications3
Abstract: In this paper, a simulation of SPWM (Unipolar) strategy is presented for Single phase full bridge inverter. The model is simulated in Matlab/Simulink. For different power factor loads the % THD of the output voltage are observed. The change in modulation index (MI) and the frequency of the carrier signal (f_c) changes the % THD of the output voltage. The width of gate pulses are modulated in order to obtain controlled inverter out voltage and to reduce the harmonic content as well. A comparative study of the % THD of the output voltage for the same load when connected across a conventional inverter and across SPWM fed inverter helps to understand the performance of the inverter. In SPWM inverter, to generate the gate signals, triangle wave is the carrier wave which is compared with the reference sinusoidal wave. The frequency of the output voltage depends on the frequency of the reference wave.
Mitigation of Voltage Fluctuations in Power System Using STATCOMIJERA Editor
Wind energy being a renewable source of energy is enjoying a rapid growth globally. However, wind energy being an uncontrollable source of energy coupled with the fact that it uses distributed induction generators for power conversion poses a challenge in integrating a large scale wind-farm into a weak power system. An actual weak power system with two large Wind-Farms (WFs) coupled to it is introduced as part of this study. A model of this integrated system along with a STATCOM for steady state and dynamic impact study is developed in the MATLAB/Simulink environment. The power quality issues are highlighted and a centralized STATCOM is proposed to solve the issue of the voltage fluctuations in particular in addition to addressing the other issues. Based on the results obtained from the simulation, the system voltage control issues are analyzed and the location of STATCOM is assessed. Finally, a STATCOM control strategy for suppression of voltage fluctuations is presented.
A comparative study for detection and measurement of voltage disturbance in o...IJERA Editor
Voltage disturbance is the most important power quality problem faced by many industrial customers. It includes voltage sag, swell, spikes and harmonics. Real time detection of these voltage disturbances posed various problems. This paper compares the various methods of detection of voltage sag and swells in real time on the basis of detection time, magnitude, effect of windowing and effect of sampling frequencies. The RMS, Peak, Fourier transform and Missing Voltage algorithm are introduced and discussed in them for real time implementation. Comparative analysis reveals that quantification of voltage sag and swell is possible using these measurements. The main focus is given on to these points and all the voltage sag and swell detection technique tested online with the help of advantech card data acquisition. The voltage sag and swell events are generated by using practical experimentation in laboratory.
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.
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.
Fault analysis in power system using power systems computer aided designIJAAS Team
This work presents a fault analysis simulation model of an IEEE 30 bus system in a distribution network. This work annalysed the effect of fault current and fault voltage in a distribution system. A circuit breaker was introduced into the system to neutralize the effect of the fault. The system was run on a PSCAD software and results were obtained. The system was monitored based on the start time and the end time of the fault and how well the circuit breaker reacts with those times. Fault occurred from 0.100 to 0.300 seconds before it was removed. At the time fault was not applied (i.e. from 0.00 to 0.100 and from 0.300 to 0.72), the circuit breaker was close and became open when fault was applied so as to cut off current flow through the line.The result obtained gave the disruption caused by the fault and the quick response of the circuit breaker in neutralizing it. Results gotten are based on when the circuit breaker is close and no fault is applied and when the circuit breaker is open due to fault. From this work, it was obtained that circuit breakers are very essential in system protection and reliability.
Three-phase-to-ground fault and its impact on voltage magnitudeijiert bestjournal
According to growth of electricity demand and the increased number of non - linear loads in power grids,providing a high quality electrical power should be considered. In this paper voltage sag of the power quality issue is studied. Voltage sag due to power system fault,three - phase - to - ground is created in distribution line model,their effect on the voltage magnitude variat ion by varying fault resistance for each phase are examined. A simple and practical method is proposed for voltage sag detection,by calculating RMS voltage over a window for particular time period. The case study contains a single - machine including distri bution line,which is simulated in MATLAB/Simulink environment. The presented simulation results validate sag,decrease of voltage magnitude for decrease in the fault resistance for three - phase - to - ground fault.
1.compensation of reactive power using d statcom in grid interfaced pv systemEditorJST
This paper displays the upgrade of voltage droops, Harmonic mutilation and low power figure utilizing Distribution Static Compensator (D-STATCOM) with LCL Passive Filter in Distribution Framework. At whatever point there is an entrance of photovoltaic cell energy to the low voltage appropriated matrix, there happen the issue of confuse in voltage and recurrence in the system, maybe brought on by non-direct loads, creating music. The model depends on the Voltage Source Converter (VSC) guideline. The D-STATCOM infuses a current into the framework to alleviate the voltage lists. LCL Passive Filter Was then added to D-STATCOM to enhance symphonies bending and low power figure. The reproductions were performed utilizing MATLAB SIMULINK.
Similar to Analysis of Voltage Sag on Power Distribution Networks with Different Transformer Connections (20)
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
#vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore#blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #blackmagicforlove #blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #Amilbabainuk #amilbabainspain #amilbabaindubai #Amilbabainnorway #amilbabainkrachi #amilbabainlahore #amilbabaingujranwalan #amilbabainislamabad
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
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.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
ML for identifying fraud using open blockchain data.pptx
Analysis of Voltage Sag on Power Distribution Networks with Different Transformer Connections
1. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 3, Issue 3, pp: (1-10), Month: July - September 2016, Available at: www.paperpublications.org
Page | 1
Paper Publications
Analysis of Voltage Sag on Power Distribution
Networks with Different Transformer
Connections
1
Sandhya Sharma, 2
Dr. A. K. Sharma
Deptt. of Electrical Engineering, Jabalpur Engineering College, Jabalpur (M.P.), INDIA
Abstract: In present era, power engineers need to plan the power system design in such a way that the system can
sustain its Power Quality (PQ) even after facing all the above said problems. Along with that the system should
also be compatible with the increasing demand of power supply. Quality of power depends on the system design,
reliability and efficiency so study of PQD is important. PQD affects industrial as well as large commercial
customers. Voltage sag is also referred as voltage dip. Voltage dip is the term given by IEC while the term "voltage
sag" (VS) is used by North American power quality commission. VS creates disturbance in the pure sinusoidal
waveform of voltage which in turn deteriorates the power quality of the system. VS occur for very short duration
of 0.5 to 30 cycles. It is decrease in RMS voltage of about 90 % to 10 % of nominal voltage. Although VS occurs
for very short duration but its effects deteriorates system with time decreases life period of the system. The present
work is an attempt to analyse the voltage sag on power distribution network with different transformer
connections. The field specifications obtained are used in MATLAB/SIMULINK and the results are discussed.
Keywords: Power Quality, Voltage Sag, MATLAB/SIMULINK.
I. INTRODUCTION
VS occurs for short duration of time due to short circuit in the system. Causes of VS are from both sides that is utility side
as well as end users side. VS arises due to utility side because of continuous switching on and off of equipments
connected in the system with the help of circuit breakers, disconnection of reclosures and switches. VS occurred due to
end users side is because of use of non-linear loads starting of large motor which requires heavy current, disturbs the
sinusoidal waveform of voltage. Apart from these, there are some natural reasons which causes voltage drop such as
lightning strikes, car hitting power pole, animal and trees touching or falling on power lines etc. All these faults are
categorized under single line to ground or double line, three phase to ground or three phase faults. Variation in voltage is
the result of significantly varying loads connected in the system. Mostly it is observed that VS occurs due to SLG fault in
the system more as compared to other types of fault. Some of the causes VS are listed below -
1. Electric motors need more current at the starting time than that at the running time, which causes VS in the system.
2. During SLG fault, until the protective switch gear comes to its action there will be VS in the line.
3. Accidents in power line such as lightning or falling of an object.
4. Excessive load or sudden load change can cause VS.
5. Depending on transformer connections, transformer energizing also gives birth to VS.
6. VS is seen when air-conditioner, refrigerator or furnace fan start.
II. LITERATURE REVIEW
J. Caicedo, Felipe Navarro, Edwin Rivas and Francisco Santamaria displayed a method for voltage sag characterization
by using MATLAB/ SIMULINK has been suggested. In this fault simulation, VS magnitude calculation is done by using
2. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 3, Issue 3, pp: (1-10), Month: July - September 2016, Available at: www.paperpublications.org
Page | 2
Paper Publications
sim power system tools. In this over-current protection has been simulated and also model developed in MATLAB/
SIMULINK. Phase angle jump in case of induction motor has been discussed with the simulation model. Suresh Kamble,
Chandrashekhar Thorat studied Voltage sag characterization in a distribution systems : A case study . VS due to SLG, DL
and DLG faults are characterize by using symmetrical component analysis and their effect on magnitude and phase angle
jumps on each phase being analyzed. In this VS has been calculated by RMS method for which a model has been
simulated on MATLAB/ SIMULINK and different types of faults applied on it and their VS behavior or effects have been
studied out. These effects are studied on the basis of magnitude, duration and phase angle jump. D.J.Won, Seon-Ju Ahn
and Y.Chung in their paper A new defination of voltage sag duration considering the voltage tolerance curve. . A new VS
duration which consider voltage tolerance characteristics of each electrical devices has been discussed. In conventional
method, VS for rectangular sag has been consider whenever the sag is non-rectangular, VS has always been
overestimated. To overcome from this, method proposed takes into account minimum voltage of voltage tolerance curve
of each equipment. This new method have been applied on non-rectangular sag generated from induction motor starting
and compared with the maximum time to calculate VS effect on equipment. E.Styvaktakis, M.J.H.Bollen shows
Automatic classification of power system events using RMS voltage measurements" (2002) IEEE Power Engineering
Society Summer Meeting. In this paper PQ monitoring in depth has been discussed. For this a method have been
suggested for automatic power system event classification using RMS voltage measurement and results show that this
classification can be applied on specific events and its limitations have been discussed. In this events covered are
energizing, non-fault interruption, fault interruption, transformer saturation, induction motor starting, step change and
faults.
Study of Area Effected: To establish compatibility in between supply system and the consumers following important
steps must be taken.
1. Find out the characteristics and number of voltage sag events.
2. Find the equipments those which are sensitive to the sag event.
3. Search for best economical solution in order to improve the performance of system and also immunity of the devices
installed in the system.
All these above mentioned steps help in making the proper co-relation between the system and consumers. The study of
area effected by the sag is termed as area of vulnerability (AV). This study of area effected, at a small scale helps in
minimizing its effect on the system. So, for making decision regarding ratings of the devices to be installed, this study is
proved to be quite beneficial. The city area and one 11 KV feeder is selected and simulated on MATLAB
Table shown below gives the details of parametric configuration taken under MATLAB/ SIMULATION.
3. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 3, Issue 3, pp: (1-10), Month: July - September 2016, Available at: www.paperpublications.org
Page | 3
Paper Publications
Fig.1: MATLAB/SIMULINK model
Transformer Yg-Yg connected:
For Yg-Yg transformer connection different types of fault giving birth to VS is shown in table below with percentage sag.
Table.1: Percentage sag on different fault on Yg-Yg transformer connection
Fig.2: SLG fault
Type of fault Pre-fault RMS
Voltage
Post-fault RMS
Voltage
% Sag
Single line to
ground
220 34.97 84.10
Double line to
ground
220 167.32 23.94
Double line 220 196.16 10.83
Three phase to
ground
220 172.48 21.60
Three phase 220 213.24 3.07
4. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 3, Issue 3, pp: (1-10), Month: July - September 2016, Available at: www.paperpublications.org
Page | 4
Paper Publications
Fig.3: Voltage waveform of all three phases during SLG
Fig.4: DLG fault (a) RMS waveform (b) Instantaneous waveform
Fig.5: Voltage waveform of all three phases during DLG
5. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 3, Issue 3, pp: (1-10), Month: July - September 2016, Available at: www.paperpublications.org
Page | 5
Paper Publications
Fig.6: DL fault (a) RMS waveform (b) Instantaneous waveform
Fig.7: Voltage waveform of all three phases during DL
Fig.8: 3-Φ G fault (a) RMS waveform (b) Instantaneous waveform
6. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 3, Issue 3, pp: (1-10), Month: July - September 2016, Available at: www.paperpublications.org
Page | 6
Paper Publications
Fig.9: Voltage waveform of all three phases during 3-Φ G
Fig.10: 3-Φ fault (a) RMS waveform (b) Instantaneous waveform
Fig.11: Voltage waveform of all three phases during 3-Φ
7. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 3, Issue 3, pp: (1-10), Month: July - September 2016, Available at: www.paperpublications.org
Page | 7
Paper Publications
Transformer Yg-Δ11 connected:
For Yg-Δ11 transformer connection different types of fault giving birth to VS is shown in table below with percentage
sag.
Table.2: Percentage sag on different fault on Yg-Δ11 transformer connection
Fig.12: SLG fault (a) RMS waveform (b) Instantaneous waveform
Fig.13: Voltage waveform of all three phases during SLG
Type of fault Pre-fault
RMS Voltage
Post-fault
RMS
Voltage
% Sag
Single line to
ground
220 216.52 1.58
Double line
to ground
220 196.35 10.75
Double line 220 196.16 10.83
Three phase
to ground
220 213.32 3.03
Three phase 220 213.24 3.07
8. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 3, Issue 3, pp: (1-10), Month: July - September 2016, Available at: www.paperpublications.org
Page | 8
Paper Publications
Fig.14: DL fault (a) RMS waveform (b) Instantaneous waveform
Fig.15: Voltage waveform of all three phases during DL
Transformer Yg-Y connected:
For Yg-Y transformer connection different types of fault giving birth to VS is shown in table below with percentage sag.
Table.3: Percentage sag on different fault on Yg-Y transformer connection
Type of
fault
Pre-fault
RMS
Voltage
Post-fault
RMS Voltage
% Sag
Single
line to
ground
220 216.52 1.58
Double
line to
ground
220 196.35 10.75
Double
line
220 196.16 10.83
Three
phase to
ground
220 213.32 3.03
Three
phase
220 213.24 3.07
9. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 3, Issue 3, pp: (1-10), Month: July - September 2016, Available at: www.paperpublications.org
Page | 9
Paper Publications
Fig.16: DLG fault (a) RMS waveform (b) Instantaneous waveform
Fig.17: Voltage waveform of all three phases during DLG
IV. CONCLUSION
From this thesis work it is concluded that during SLG fault when transformer is Yg-Yg connected VS is quite high
compare to transformer when Yg-Y connected. Similarly, in case of 3-Φ fault VS is observable when transformer is Yg-Yg
connected. When transformer connection is Yg-Y DL fault is observable more clearly then in transformer connection Yg-
Δ11.
REFERENCES
[1] Joaquín Caicedo, Felipe Navarro, Edwin Rivas and Francisco Santamaría Electromagnetic Compatibility and
Interference Group (GCEM) (2012) Voltage Sag Characterization with Matlab/Simulink, Colombia IEEE
[2] S.Kamble and Chandrashekhar Thorat (2014) Voltage Sag Characterization in a Distribution Systems : A Case
Study Journal of Power and Energy Engineering, 2014,2,546-553.
[3] IEEE Recommended Practice for Monitoring Electric Power Quality. (2009) IEEE Std. 1159-2009.
[4] P.Heine and M. Lehtonen, (2003) Voltage Sag Distributions Caused by Power Systems Faults. IEEE Transactions
on Power Systems, 18, 1367-1373. http://dx.doi.org/10.1109/TPWRS.2003.818606
10. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 3, Issue 3, pp: (1-10), Month: July - September 2016, Available at: www.paperpublications.org
Page | 10
Paper Publications
[5] R. Naidoo and P.Pillay (2007) A New Method of Voltage Sag and Swell Detection. IEEE Transactions on Power
Delivery, 22, 1056-1063. http://dx.doi.org/10.1109/TPWRD.2007.893185
[6] E.E. Juarez and A. Hernandez (2006) An Analytical Approach for Stochastic Assessment of Balanced and
Unbalanced Voltage Sags in Large Systems. IEEE Transactions on Power Delivery, 21, 1493-
1500.http://dx.doi.org/10.1109 /TPWRD.2005.860266
[7] D.-J. Won, S.-J. Ahn and Y.Chung,(2003) A New Definition of Voltage Sag Duration Considering the Voltage
Tolerance Curve. IEEE Bologna Power Tech Conference, Bologna, 4, 23-26 June 2003.
[8] L.D. Zhang and M.H.J.Bollen,(2000) Characteristic of Voltage Dips (Sags) in Power Systems. IEEE Transactions
on Power Delivery, 25, 827-832.
[9] Larry Conard, Kevin Little and Cliff Grigg (1991) Predicting And Preventing Problems Associated With Remote
Fault-Clearing Voltage Dips. IEEE Transactions on Industry Applications,27.
[10] (1998) IEEE Recommended Practice for Evaluating Electrical Power System Compatibility With Electronic Process
Equipment.IEEE Std.1346-1998.
[11] F.R.Zaro, M.A.Abibo, S.Ameenuddin and I.M.Elamin (2012) Characterization Of Short-Duration Voltage Events.
IEEE International Conference on Power and Energy(PECon).
[12] S.Khokhar, A.A. Mohd Zin, A.S.Mokhtar, NAM Ismail (2014) MATLAB/Simulink Based Modeling and
Simulation of Power Quality Disturbances. IEEE.
[13] Ohrstrom, M. and Soder, L. (2003) A Comparison of Two Methods Used for Voltage Dip Characterization. IEEE
Power Tech Conference, Bologna, 4, 23-26 June 2003.
[14] Styvaktakis, E., Bollen, M.H.J. and Gu, I.Y.H. (2002) Automatic Classification on Power System Event Using RMS
Voltage Measurements. IEEE Power Engineering Society Summer Meeting, 2, 824-829.