Design and Implementation of Street Lighting Plan for Optimum Energy Saving

Vol. 10  Issue 1
Year: 2016
Issue: Jul-Sep 
Title:Design and Implementation of Street Lighting Plan for Optimum Energy Saving
Author Name:Shekhappa G. Ankaliki, B.R. Umarane and Shivanand D. Hirekodi
Synopsis:
This paper presents the design of energy efficient street lighting plan and its implementation to a professional institution for optimum energy saving. Even though the initial cost to implement the plan is more, a considerable amount of energy saving can be obtained by choosing the efficient street lighting plan and energy efficient long life lamps. The design of street lighting scheme includes campus survey, selection of street lighting poles, cross arms and fittings as per manufacturer guidelines for proper illumination and energy efficiency. The optimum energy saving can be achieved by installing high power cool LED fittings. The designed energy efficient street lighting plan is suggested for professional institution and is implemented. This will help to increase the reliability of the electric supply and provides a considerable amount of savings in electricity charges.

Comparative Performance Analysis of PID, Fuzzy-Mamdani, Fuzzy-Sugeno and ANFIS for Automatic Generation Control of Multi-Area Power System

Vol. 10  Issue 1
Year: 2016
Issue: Jul-Sep 
Title:Comparative Performance Analysis of PID, Fuzzy-Mamdani, Fuzzy-Sugeno and ANFIS for Automatic Generation Control of Multi-Area Power System
Author Name:Umesh Kumar Singh and L.B. Prasad
Synopsis:
Automatic Generation Control (AGC) insures a sufficient, reliable and good quality of power to the consumer. It insures that the amount of power available should be sufficient and the frequency deviation is within the rated limit. Any mismatch between generation and demand causes deviation in the system frequency from its nominal value. If load is continuously changing in nature, the frequency deviation goes on increasing, which may lead to system collapse. So in order to maintain the stability in power generation, a very fast and accurate controller is needed to maintain the nominal system frequency. In this paper, Proportional- Integral-Derivative controller and artificial intelligent controllers such as Fuzzy-Mamdani, Fuzzy-Sugeno and Adaptive Neuro Fuzzy Inference System (ANFIS) has been presented for AGC of fourarea (Thermal-Nuclear-Thermal-Hydro) interconnected power system including Generation Rate Constraint (GRC).

Modeling of a Variable Speed Drive Using Adaptive Fuzzy System

Vol. 10  Issue 1
Year: 2016
Issue: Jul-Sep 
Title:Modeling of a Variable Speed Drive Using Adaptive Fuzzy System
Author Name:J.N. Chandra Sekhar and G.V. Marutheswar
Synopsis:
This paper presents the operation of Space Vector Modulation (SVM) based DTC scheme for a Voltage Source Inverter fed Induction Motor Drive. Firstly, the performance of existing model is studied with Fuzzy Logic Controller. In order to incorporate better dynamic response, the discussed model is further simulated using Adaptive Fuzzy Controller. Simulations results obtained with these controllers are presented and compared. It may be inferred that Adaptive Fuzzy based model exhibit better operational features with regard to torque and flux response. The performance of this control method has been demonstrated by simulations done using MATLAB/SIMULINK tool.

Design of Grid Connected PV System using PVsyst

Vol. 10  Issue 1
Year: 2016
Issue: Jul-Sep 
Title:Design of Grid Connected PV System using PVsyst
Author Name:Rachit Srivastava and Vinod Kumar Giri 
Synopsis:
Photovoltaic system simulation software is very important in prediction of output electricity from the PV system. In this paper, Grid connected photovoltaic system is simulated using the PVsyst software. In this study, PVsyst software is used to design a grid connected PV system for Madan Mohan Malaviya University of Technology, Gorakhpur in India. The detailed system configuration, system output and system losses are determined in this study. From the previous simulation by the HOMER software, optimal size of the PV system is determined, that is able to supply the electricity to the university throughout the year. It is founded that 2000 PV module and 10 grid connected inverter is the optimal solution for the load of university. About 901.44 Mwh electricity will be available to the grid in a year.

A review on piezoelectric effect and its application with future prospects

Vol. 10  Issue 1
Year: 2016
Issue: Jul-Sep 
Title:A review on piezoelectric effect and its application with future prospects
Author Name:Shivang Jitendra Khare, Nitin Sharma and Santosh Kumar
Synopsis:
In the present era as there is a decrease in energy consumption of portable electronic devices, the hypothesis of harvesting renewable energy in our surroundings provoke a renewed interest. The need for energy is also increasing at a fast rate, which has exhausted lots of resources. So, there is a need to produce more energy. Mechanical energy harvesting happens to be the most prominent energy harvesting technique. This utilizes piezoelectric components where electric charge is generated by deformations produced. This technical paper emphasis on one such method through piezoelectric material. The motive is to obtain pollution–free energy source and to utilize the energy being wasted. A piezoelectric substance is one that produces an electric charge when a mechanical stress is applied. Piezoelectric materials can be used as a mechanism to transfer mechanical energy, usually ambient vibration, into electrical energy that can be stored and used to power other devices. Conversely, a mechanical deformation is produced when an electric field is applied. Piezo-film can generate enough electrical density that can be stored in a rechargeable battery for later use. Currently, there is a need to utilize other forms of energy at passenger terminals like airports and railways across the world. Cleaner, more useful forms of electrical power are needed in order to keep costs lower and to ensure a pollution free environment for future generations. The use of piezoelectric devices installed in the terminals will capture the kinetic energy from foot traffic. Such a source of power can then be used to operate lighting systems. In this paper, the concept of piezoelectricity and piezoelectric effect is well discussed. The various applications based on piezoelectric effect are also elaborated. Future prospects regarding piezoelectric materials in day-to-day life are also well highlighted.

Open Loop Speed Control Of Brushless DC Motor Using Low Cost Arduino Uno Processor

Vol. 10  Issue 1
Year: 2016
Issue: Jul-Sep 
Title:Open Loop Speed Control Of Brushless DC Motor Using Low Cost Arduino Uno Processor
Author Name:Devendra Potnuru, Alice Mary K. and Sai Babu Ch. 
Synopsis:
This paper deals with open loop speed control of Brushless DC motor (BLDC) using Arduino UNO processor. Real-time implementation of the drive in open loop speed control has been performed in which speed of the motor depends on the input voltage given to the stator winding and it is nothing but duty cycle setting. The open loop speed control is also useful in many practical applications however, the present work mainly deals with studying the running performance of the drive without using any speed feedback arrangement. That means, the speed of the motor may vary when it is subjected to load variations and/or supply voltage variations. The validity of the proposed approach is proven through experimentation on BLDC motor using low cost Arduino UNO processor. Speed Control of BLDC motor using other microcontroller requires more hardware and increases the cost, and the availability of Arduino with versatile features motivated to develop a cost effective and reliable control with variable speed range. In the present work, an algorithm which uses the Hall sensor signals acquired from the motor is developed and the program has been written using Arduino. This program generates the firing pulses required to drive the MOSFETs of three phase fully controlled bridge converter driven by IR2101 FET drivers. Later the program which has been dumped on the Arduino and tested with the 24 V, 80 W, 1500 rpm BLDC motor which can make the motor run at constant speed ranging from 6 to 1500 rpm. The proposed hardware and the program are found to be efficient and the results are promising.

A Review on Novel Hybrid Approximate Method Using Firefly, Wavelet, Algorithm and Day Ahead Power Cost Forecasting.

Vol. 9  Issue 4
Year:   2016
Issue:Apr-Jun 
Title:A Review on Novel Hybrid Approximate Method Using Firefly, Wavelet, Algorithm and Day Ahead Power Cost Forecasting.
Author Name:Mukh Raj Yadav and Kishan Bhushan Sahay 
Synopsis:
This paper shows a novel half and half insightful calculation using an information sifting method taking into account Wavelet Transform (WT), a streamlining method with Fuzzy Firefly (FF) calculation. Furthermore, a delicate registering model taking into account Fuzzy ARTMAP (FA) system, keeping in mind the end goal to conjecture day-ahead power costs in the Ontario market. An extensive near examination with other delicate registering and cross breed models demonstrate a noteworthy change in conjecture mistake about maximum 40% for every day and monthly cost gauges, by utilization of an expected cross breed model. Besides, minimum code acquired to estimate the Mean Square Error (MSE) and mean supreme blunder shows maximum level of exactness to the expected model. Vigor to the expected crossover wise models are determined by utilizing factual list (blunder change). Also, the great figure execution and the fast versatility of the proposed half and half model are likewise assessed utilizing the PJM market information.

Implementation Of Perturb and Observe (P&O) Method to Track the Maximum Power Point Using Buck Converter.

Vol. 9  Issue 4
Year:   2016
Issue:Apr-Jun 
Title:Implementation Of Perturb and Observe (P&O) Method to Track the Maximum Power Point Using Buck Converter.
Author Name:Bal Mukund Sharma and Kuldeep Sahay 
Synopsis:
This study presents a new kind of Maximum Power Point Tracking algorithm based on perturb and observe algorithm. A generalized photovoltaic array simulation model in Matlab/Simulink environment is developed and presented in this paper. The model includes PV module and array for easy use on simulation platform. The proposed model is designed with a user-friendly icon and a dialog box like simulink block libraries. Considering the effect of solar irradiance and temperature changes, the output current and voltage of PV modules are simulated and optimized using this model. A perturb and observe algorithm based maximum power point tracker is also developed using the presented model in Matlab/Simulink. It can successfully track the maximum power point more accurately and quicker than other conventional method based controller in these situations. The general model was implemented on Matlab scrip file, and accepts irradiance and temperature as variable parameters and outputs the I-V characteristic. A particular typical 800W solar panel was used for model evaluation and results.

Effect of Automation Intensity Levels on Distribution System Reliability

Vol. 9  Issue 4
Year:   2016
Issue:Apr-Jun 
Title:Effect of Automation Intensity Levels on Distribution System Reliability
Author Name:V.S.S. Sailaja and P.V.N. Prasad
Synopsis:
Electric power distribution systems are responsible for delivering the electrical energy from the bulk power systems to the customers. Radial operation, aging infrastructures, poor design and operation practices and high exposure to environmental conditions have caused the electric power distribution systems as the main contributor to the system reliability problems. Generally, about 80 to 90 percents of the customer reliability problems originate from the electric power distribution systems. In this paper, the effect of two automation intensity levels on the reliability of radial distribution system is compared with system without automation. Partial automation and complete automation are considered. The effects of automation intensity levels on the outage time of the components considering the sequence of fault diagnosis activities that will take place from the initiation of fault to the service restoration and the reliability of the system is measured in terms of SAIDI, CAIDI, SAIFI and ENS. These reliability indices are calculated for the Roy Billinton Test System (RBTS) Bus2 using Failure Modes and Effects Analysis technique.

STATCOM With d-q Decoupled Control for Wind Energy Conversion Systems.

Vol. 9  Issue 4
Year:   2016
Issue:Apr-Jun 
Title:STATCOM With d-q Decoupled Control for Wind Energy Conversion Systems.
Author Name:G. Muni Reddy, T. Gowri Manohar and V. Jyothsna Priya
Synopsis:
The electric power generation from renewable energy sources like wind energy has increased in recent years due to environmental problems and the shortage of conventional energy sources in the near future. More and more wind farms are being integrated into power system grid. Integration of large scale of wind farms into power system presents challenges such as voltage and reactive power control, frequency control, grid stability and power quality. This paper demonstrates the power quality problems due to integration of wind turbine with the grid. In this proposed scheme, STATic COMpensator (STATCOM), with decoupled control of d and q current components, is connected at a point of common coupling with a battery energy storage system to reduce the effect of power quality issues. The STATCOM with decoupled control of d and q current components control scheme is employed for the grid connected wind energy conversion system is simulated using MATLAB/SIMULINK. The effectiveness of the decoupled control of d and q current components control scheme is, it takes care of the reactive power requirement of the load and the induction generator and thus improving the source side power factor and there will be a marked reduction in the Total Harmonic Distortion.

Comparison of Methods of MPPT in Solar PV System.

Vol. 9  Issue 4
Year:   2016
Issue:Apr-Jun 
Title:Comparison of Methods of MPPT in Solar PV System.
Author Name:D. Jagadeesh and T. Nageswara Prasad
Synopsis:
In this paper, the Maximum Power Point Tracking (MPPT) of a solar Photovoltaic (PV) system under Partial Shaded Conditions (PSC) is developed using biologically inspired algorithms. The proposed methods are compared with a conventional technique viz., incremental conductance method under partial shaded conditions. The major advantages of the proposed methods are speed of convergence, accuracy in tracking and low power oscillations. The drawback associated with conventional techniques is falling at local MPP instead of global MPP. The improved performance of the proposed method is validated through MATLAB coding in terms of tracking speed, accuracy and power oscillations.

A New Maximum Power Point Tracking Control Technique of Solar Photovoltaic Water Pumping System.

Vol. 9  Issue 4
Year:   2016
Issue:Apr-Jun 
Title:A New Maximum Power Point Tracking Control Technique of Solar Photovoltaic Water Pumping System.
Author Name:Amine Daoud
Synopsis:
Recently, the importance of photovoltaic systems in the generation of electricity has attracted much attention because of their electrical energy production close to where it is required, no greenhouse gas emission, low maintenance cost, and no noise. However, the promotion of photovoltaic system has been limited by two problems, low conversion rate and maximum power point varying with atmospheric conditions (irradiance, temperature and air mass). Hence, one of the most economical ways to improve utilization efficiency of a photovoltaic system is to ensure that it is always operates at its maximum power point irrespective of the environmental conditions. Thus, it becomes necessary to use MPPT controller in order to ensure the efficient operation of the photovoltaic system. Within this overall context, the present paper focuses specifically on the development of new Maximum Power Point Tracking (MPPT) technique used in Photovoltaic (PV) water pumping systems. Furthermore, using this technique, only the input voltage of a PV array needs to be sensed in order to find and track the MPP. The system under study consists of a PV array, a DC-DC buck-boost converter, a DC motor-pump and an MPPT controller. This pumping system is fully modeled and simulated in MATLAB environment. Analytical models for determining PV array output power, motor-pump flow rate and shaft speed are detailed and explained. The simulation results demonstrate that the proposed MPPT technique can track the MPP perfectly.

Approximate System Reliability Analysis of Distribution Networks With Repairable Components and Common Cause Failures

Vol. 9  Issue 3
Year:  2016
Issue:Jan-Mar 
Title:Approximate System Reliability Analysis of Distribution Networks With Repairable Components and Common Cause Failures
Author Name:D. Ravi Kumar and V. Sankar
Synopsis:
Common Cause Failures (CCF) would indicate the failures of multiple components in a system due to some cause. In this paper, an attempt has been made to analyze the Limiting State Probabilities (LSP) of states for small repairable systems in which, the components are prone for failures due to CCF. For large systems, the same can also be used, as failure modes represent cut sets of the system and it is known that cut sets of order more than three can be ignored as they don't contribute much to predict the indices for approximate system reliability analysis. Analysis of repairable components with CCF is presented with a case study.

Transient Model and Detection of Stator Inter-Turn Fault in Inverter Driven Induction Motor Drives by Time Domain Technique

Vol. 9  Issue 3
Year:  2016
Issue:Jan-Mar 
Title:Transient Model and Detection of Stator Inter-Turn Fault in Inverter Driven Induction Motor Drives by Time Domain Technique
Author Name:Khadim Moin Siddiqui, Kuldeep Sahay and V.K. Giri
Synopsis:
These days, the induction motor driven by inverter, drives are being popular and used in the industries for variable speed applications with very competitive pricing. In this paper, a new dynamic pulse width modulated inverter fed squirrel cage induction motor simulation model is used for the stator inter-turn winding fault detection purpose. Through the proposed model, the transient behavior of the induction motor has been analyzed for healthy as well as for stator interturn faulty conditions by time domain approach. Therefore, early, stator inter-turn fault diagnosis is possible and may avoid the motor to reach in the catastrophic conditions. Therefore, may save large revenues for industries.

Improved Solar PV Cell Matlab Simulation Model and Performance Analysis.

Vol. 9  Issue 3
Year:  2016
Issue:Jan-Mar 
Title:Improved Solar PV Cell Matlab Simulation Model and Performance Analysis.
Author Name:Vivekanand Rai and Kishan Bhushan Sahay 
Synopsis:
This paper presents an efficient mathematical and simulation model for a solar photovoltaic system. This is an analysis on the characteristics of photovoltaic (PV) Cell under various weather conditions. Considerably, the PV cells are nonlinear in nature, whose characteristics and the maximum power point varies with irradiance and temperature. It focuses on the effect of variation in series and shunt resistances. The model is proposed to study the expected environmental issues on the solar power generation. By the help of this model, a study of large PV system or solar energy system can be done easily. This model elaborates various effects of parameter variation on the P-V and I-V characteristics of the PV module. This model was developed with the help of Simulink software and can be utilised for various study and research purposes.

Techno-Economically Feasible Inverter of 1kw Capacity for Domestic Solar Panel Use

Vol. 9  Issue 3
Year:  2016
Issue:Jan-Mar 
Title:Techno-Economically Feasible Inverter of 1kw Capacity for Domestic Solar Panel Use
Author Name:Arati Mulye and Sanjay Mohite
Synopsis:
Demand of the energy is gradually increasing and as the conventional sources are about to be emptied, new types of energy sources must be create in order to meet the future demands. One of such sources is the photovoltaic cell, which converts sunlight to electrical current, without any mechanical or thermal hardware. This paper represents the design of techno-economical feasible inverter of 1Kw capacity for the use of domestic solar panel. The whole system consists of a single solar panel of 17V-10W, Charge Controller of 600mA-15V and DC to AC inverter. The DC power generated by solar panel is directly fed to the load by converting it into AC power using Inverter. The invert designed is a single phase matrix converter which performs a function such as frequency changer, rectifier, inverter, chopper etc. IGBTs in inverter circuit are switched by pulse width modulation obtained from comparator circuit. Batteries of suitable range are used to store the power. The simulation of inverter is carried out in MATLAB / SIMULINK and hardware design is obtained using readily available IC's and other components.

Mathematical Modelling and Simulation Of 120mw Coal Fired Power Plant

Vol. 9  Issue 3
Year:  2016
Issue:Jan-Mar 
Title:Mathematical Modelling and Simulation Of 120mw Coal Fired Power Plant
Author Name:Vivek Patel and Vikas Patel
Synopsis:
This paper presents the simulation modelling of thermodynamic model of 120MW coal fired power plant of that use as a thermal power generation to calculate the electrical output of a coal-fired power plant. Initially, a detailed model of a coal-fired power plant is designed to calculate energy and efficiency of the plant. This model predicts useful heat input and thermal losses that occur in the power plant. Thermodynamic models are working on the first law of thermodynamics using balance equations for each component. The power plant making some assumption performance is evaluated in design conditions. Every component is modelled as a single control volume at steady-state conditions. The pressure drops on the lines are not considered and gland steam is neglected. Trivial changes in fluid state between the outlet of one component and the inlet of the next are assumed and also the potential energy and the kinetic energy are neglected.

Parameter Estimation Of Permanent Magnet Synchronous Motor-A Review

Vol. 9  Issue 2
Year: 2015
Issue:Oct-Dec 
Title:Parameter Estimation Of Permanent Magnet Synchronous Motor-A Review
Author Name:P. Ramana, K. Alice Mary, M. Surya Kalavathi and A. Swathi 
Synopsis:
Permanent Magnet Synchronous Motor (PMSM) drives are being used increasingly in a wide range of applications, such as machine tools, robotics, aerospace generators, actuators and electric vehicles. It is extensively used in industrial applications due to it's advantageous features such as high efficiency, high torque to inertia ratio, low noise and robustness. In advanced motor control system, an accurate knowledge of motor parameters are essential in order to achieve better performance. Machine parameters are classified into electrical parameters such as resistances of windings and d, q axes inductances of both stator and rotor and mechanical parameters such as angular position, speed, moment of inertia and viscous friction coefficient. Various types of parameter estimation methods for PMSM are available in the literature such as back e.m.f. based method, signal injection based method, state observer based method, Model Reference Adaptive System (MRAS) based method etc. This paper presents a review of all these methods used to estimate the parameters of a Permanent Magnet Synchronous Motor.

Fault Classification of Induction Motor Bearing Using Statistical Features and Artificial Neural Network.

Vol. 9  Issue 2
Year: 2015
Issue:Oct-Dec 
Title:Fault Classification of Induction Motor Bearing Using Statistical Features and Artificial Neural Network.
Author Name:Raj Kumar Patel and V. K. Giri 
Synopsis:
Bearings are one of the critical components in rotating machines and the majority of failure arises from the defective bearings. Bearing failure leads to failure of a machine and unpredicted productivity loss for production facilities. Hence, bearing fault detection and diagnosis is an integral part of the preventive maintenance procedures. In this paper, vibration signals for four conditions of a deep groove ball bearing Normal (N), fault on Inner Race (IR), fault on ball and fault on Outer Race (OR) were acquired from a customized bearing test rig, under no load and full load condition and each load condition with two fault size 0.007 inch and 0.021 inch has been taken. Statistical parameter from the time domain has been used as a feature of vibration signal for the classification purpose. Sensitivity analysis is performed to understand the significance of each input feature on the ANN (Artificial Neural Network) output. The ANN performance has been found to be comparatively higher to those feature which are highly sensitive

Permanent Magnet Synchronous Motor As Traction Motors For Diesel-Electric Traction in India.

Vol. 9  Issue 2
Year: 2015
Issue:Oct-Dec 
Title:Permanent Magnet Synchronous Motor As Traction Motors For Diesel-Electric Traction in India.
Author Name:C. Nagamani, R. Somanatham, U. Kusuma Kumari and U. Chaitanya Kumar
Synopsis:
The use of Insulated Gate Bi-polar Transistor as the switching device in rectifier and inverters for high power applications like electric traction as it is efficient, reliable, has improved power factor and also robust. Combined with the technology of manufacture of 3-φ Squirrel Cage Induction Motors, the modern diesel-electric locomotives are driven by dieselengine driven alternators. These modern diesel locomotives are called the Electro-motive Diesels. In this paper, a new drive system with Permanent Magnet Synchronous Motors (PMSM) as traction motors is being suggested by the authors as PMSM are robust, more efficient, work on near unity power factor, and have a higher torque/Volume ratio.

Effect Of Resonance on the Performance Of Single phase Two Winding Self Excited Induction Generator.

Vol. 9  Issue 2
Year: 2015
Issue:Oct-Dec 
Title:Effect Of Resonance on the Performance Of Single phase Two Winding Self Excited Induction Generator.
Author Name:M. Rizwan Khan and M. Faisal Khan 
Synopsis:
Due to an inherently poor voltage regulation, the Self Excited Induction Generators (SEIGs) are incapable of supplying RL loads. One way of improving their voltage regulation is by series capacitance compensation. However, as the steady state load-ability limit of a compensated SEIG is increased, it is more likely to experience resonance due to change in either inductive loading or frequency or both. In this paper, a detailed analysis of resonating behavior of a single phase, two winding SEIG is carried out. The effects of resonance on the performance of SEIG are evaluated through performance characteristics obtained at the loads of different power factors. A steady state model of series compensated single phase, double winding SEIG is developed through MATLAB M file. The optimum excitation and compensation capacitances are selected by performing experimental tests on a 1 phase, double winding, 220/230 V SEIG.

Performance Analysis of Model Reference Adaptive Control Using Lyapunov Approach for A Dynamical System.

Vol. 9  Issue 2
Year: 2015
Issue:Oct-Dec 
Title:Performance Analysis of Model Reference Adaptive Control Using Lyapunov Approach for A Dynamical System.
Author Name:Eshita Rastogi and L.B. Prasad 
Synopsis:
In this paper, a review on adaptive control scheme and the performance analysis of model reference adaptive control is presented. This paper deals with the application of Model Reference Adaptive Control (MRAC) using Lyapunov stability criteria for a dynamical system. The control scheme is implemented for the first order dynamical system considering different values of adaptation gain. Simulation result and analysis were presented for different values of adaptation gain and reference signals. The tracking error and parameter estimation error were also analyzed

Optimal Placement Of DG In RDS To Enhance The Reliability Indices - A Case Study

Vol. 9  Issue 1
Year: 2015
Issue:Jul-Sep
Title:Optimal Placement Of DG In RDS To Enhance The Reliability Indices - A Case Study
Author Name:Para Sindhu Priya and N. Chaitanya Kumar Reddy 
Synopsis:
The problem of voltage deviation and power loss was mostly addressed in Distribution Systems (DS) due to the usage of non linear loads. Some or all the customers use these non-linear loads which make the operation of the DS in ill-condition. Network reconfiguration, coordinate planning, and capacitor placements are few methods which are used for improving the voltage profile and reducing the losses. A highly effective reliable generation and transmission system may still result in poor energy supply to the customers if the distribution system is operated unreliable. Planning and operation of DS requires quantitative reliability assessment. DS can be operated reliable by accommodating a small scale decentralized Distribution Generation (DG) in a system, by which the losses in the system was reduced and voltage profile was improved predominantly. Placement of DG in DS will improve the system performance, voltage profile, provides continuity of supply to the customers with reduced losses. DS reliability can be evaluated by load point based indices Average System Interruption Frequency Index (ASIFI) and Average System Interruption Duration Index (ASIDI). These reliability indices are needed to be evaluated before and after DG placement to analyze the system performance. A case study was done on the 11 kV Sodium feeder before and after DG placement to analyze the system performance and reliability indices are evaluated.

A Review On Hysteresis Current Controller and Space Vector Analysis In Inverter.

Vol. 9  Issue 1
Year: 2015
Issue:Jul-Sep
Title:A Review On Hysteresis Current Controller and Space Vector Analysis In Inverter.
Author Name:Anees Ansari and A.N. Tiwari
Synopsis:
This review paper is based on space vector based hysteresis current control in three phase PWM converter. In hysteresis current control technique, two, three or four level hysteresis comparator are used, which selects the appropriate inverter output voltage vectors by their switching phenomenon of vector based HCC, and it is used to control the current vector by keeping the current error vector in tolerance region. Through which the load gets desirable output current voltage. By keeping the zero phase difference between output current and voltage, acquires a high power factor by HCC voltage vector and this HCC voltage vector have some advantages over conventional HCC which are not to have interphase dependency and also maintaining constant modulation frequency or also reducing switching frequency. By this HCC, increase the system steady state performance and reducing dynamic response.

Topologies In Matrix Converter - A Review

Vol. 9  Issue 1
Year: 2015
Issue:Jul-Sep
Title:Topologies In Matrix Converter - A Review
Author Name:G. Pandu Ranga Reddy and M. Vijaya Kumar
Synopsis:
Due to recent advancements in the field of power electronics and power semiconductor devices, a long known topology is back in the focus of research. The matrix converter topology has been known for more than three decades and yet not many products using the matrix converter are currently available. This converter has several attractive features that have been investigated in the last two decades. In the last few years, an increase in research work has been observed, bringing this topology closer to the industrial application. Matrix converters are direct AC to AC power converter topology that can generate required amplitude and frequency of AC sinusoidal wave from conventional AC source. It is a forced commutated converter which uses an array of controlled bi-directional switches as the main power elements to create a variable output voltage system with unrestricted frequency. It operates at unity power factor and is capable of regeneration. Often referred to as an all-silicon solution as no DC-link capacitors are required, the matrix converter provides inherent bidirectional power flow, sinusoidal input and output current, power factor control, and minimal energy storage requirements. This paper presents development of this converter, starting with a brief historical review and topologies used in matrix converter.

Overview of Predictive Control Schemes Used In Power Converters and Drives

Vol. 9  Issue 1
Year: 2015
Issue:Jul-Sep
Title:Overview of Predictive Control Schemes Used In Power Converters and Drives
Author Name:Pooja Dhawan, V. K. Giri and Vikas Patel
Synopsis:
This paper traces the basic concepts behind the predictive control strategy used in power converters and drives. Wide research on predictive control has been increasing day-by-day. With the availability of new digital control techniques, various schemes has been proposed. Predictive control scheme presents several advantages over other control schemes that makes it capable for various applications in the field of power electronics and drives i.e. inclusion of constraints and nonlinearities. A classification of predictive control scheme is presented and each scheme is described along with its application. This paper reflects the robustness as well as flexibility of predictive control scheme. Predictive control scheme has the capability to advance the performance of future energy processing and control systems.

Comparative Performance of Squirrel Cage Motors on GTO and IGBT Drives for Electric Traction in India

Vol. 9  Issue 1
Year: 2015
Issue:Jul-Sep
Title:Comparative Performance of Squirrel Cage Motors on GTO and IGBT Drives for Electric Traction in India
Author Name:C. Nagamani, R. Somanatham, U. Kusuma Kumari and U. Chaitanya Kumar 
Synopsis:
The electric locomotives of Indian Railways currently use Gate Turn-Off Thyristors for traction drive systems. Though they are fast switching devices, they produce lot of harmonic ripples in the output voltages and currents. The snubber circuits of Gate Turn-Off Thyristors are also bulky. Comparatively, Insulated Gate Bipolar Transistors produce less harmonic ripples and also reliable fast switching devices capable of handling voltages and currents of the range 5kV and 1kA respectively. Research has also proved that, Insulated Gate Bi-Polar Transistors are also an efficient switching devices in high voltage/power applications like electric traction. The simulation studies of performance of the Squirrel Cage induction motors with Gate Turn-off Thyristors/Insulated Gate Bi-Polar Transistor as switching devices are presented in this paper.