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Linga Reddy, P.
- A Three-Phase Grid-Connected Fuel Cell System based on a Boost-Inverter
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Authors
Affiliations
1 Department of EEE, KL University, Vaddeswaram, Guntur - 522502, Andhra Pradesh, IN
1 Department of EEE, KL University, Vaddeswaram, Guntur - 522502, Andhra Pradesh, IN
Source
Indian Journal of Science and Technology, Vol 8, No 23 (2015), Pagination:Abstract
The power generation from the fuel cell system is an electrochemical reaction between hydrogen and oxygen with the bi-product of water vapour molecule. But the output power from the solar system is very low for this numbers of cell are connected in series. This paper proposes a concept of boost inverter topology for converting fuel dc supply to a three phase supply. The main advantage of the proposed boost inverter method include ability to deliver the operations of both boosting and inversion of the power in only one stage, compactness, and economical. The output voltage from the fuel cell is a voltage controlled method and output from the battery is a current controlled method. Analysis and Simulation are taken from a 1kW prototype.Keywords
Battery Storage System, Boost-Inverter, Fuel Cell Energy System- Islanding Detection in a Distribution System with Photovoltaic (PV) System as Distributed Generation
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Authors
Affiliations
1 KL University, Vaddeswaram - 522 502, Guntur, Andhra Pradesh, IN
2 Department of EEE, KL University, Vaddeswaram - 522 502, Guntur, Andhra Pradesh, IN
3 Department of EEE, ERDA, Vadodara - 390010, Gujarat, IN
1 KL University, Vaddeswaram - 522 502, Guntur, Andhra Pradesh, IN
2 Department of EEE, KL University, Vaddeswaram - 522 502, Guntur, Andhra Pradesh, IN
3 Department of EEE, ERDA, Vadodara - 390010, Gujarat, IN
Source
Indian Journal of Science and Technology, Vol 8, No 27 (2015), Pagination:Abstract
Objectives: One of the most crucial problems of distributed generation is islanding detection in power system. In this paper, the variation of frequency and THD value of voltage waveform at PCC will be studied for islanding detection diagnosis. Statistical Analysis: Islanding detection methods are classified as local and remote islanding detection. In that local methods are categorized as passive and active methods. These two methods are based on changing in parameters such as frequency, voltage and current harmonics. But these methods have some challenges such as reduction in power quality and large Non Detection Zone (NDZ) whereas remote methods doesn’t contains NDZ but not economically suitable for small networks. The studied system was considered by following the standard IEEE-1547 and UL-1741.This work is performed to determine islanding detection in power system. Findings: Whenever the grid disconnects from the power system there will be variations in frequency and THD value of voltage waveform at PCC. These variations will be taken as reference for islanding detection and generates trip signal for DG. Application/Improvements: This work is used in various power system applications. Simulation results using SIMULINK software on the power shows the effectiveness of proposed method.Keywords
Distributed Generation (DG), Grid-Connected, Islanding Detection, Non Detection Zone (NDZ), Point of Common Coupling (PCC), Reactive Power Output, Total Harmonic Distortion (THD)- Particle Swarm Optimization Technique for Equalization of EV Load with Variable Wind Power Generation
Abstract Views :181 |
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Authors
Affiliations
1 Electrical and Electronics Engineering, KL University Greenfields, Vaddeswaram, Guntur District - 522502, Andhra Pradesh, IN
1 Electrical and Electronics Engineering, KL University Greenfields, Vaddeswaram, Guntur District - 522502, Andhra Pradesh, IN
Source
Indian Journal of Science and Technology, Vol 9, No 37 (2016), Pagination:Abstract
Objectives: An Electric Vehicle (EV) charging station supplies electrical energy for the charging of Electric Vehicles. As the plug-in hybrid electric vehicle is expanding, there is a growing need for widely distributed publicly accessible charging stations. This paper defines Optimization method for equalize/match charging schedule of Electric vehicle with dynamic wind power availability. Methods/Statistical Analysis: Optimal charging cost and average running time are the major considerable constraints at equalization of dynamic wind power with EV load. Depending upon the remaining parking time, the EVs are aggregated to reduce the size of the problem. The proposed model innovatively incorporates the degree of equalization between EV charging load and Wind power into the objective function. Estimation of EV parking time affects the charging schedule, so it is a considerable factor for optimization. Findings: Particle Swarm Optimization (PSO) technique can optimize/reduce the scheduling problems and it can equalize dynamic behavior of wind power generation with respect to EV loads. Applications/Improvements: Computational efficiency and the average running time show the validation of the proposed technique.Keywords
Electric vehicle, Wind power generation (WPG), Particle Swarm Optimization (PSO), smart grid.- An LVRT Solution for DFIG Wind Turbine during Symmetrical Grid Fault by using “Sen” Transformer
Abstract Views :230 |
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Authors
Affiliations
1 Department of EEE, K L University, Guntur - 522502, Andhra Pradesh, IN
1 Department of EEE, K L University, Guntur - 522502, Andhra Pradesh, IN
Source
Indian Journal of Science and Technology, Vol 8, No 36 (2015), Pagination:Abstract
Due to fuel crisis and increasing power demand, present days the power grid is interconnected with various renewable energy sources, among them wind energy is a vital and gifted source. DFIG is highly developed wind turbine generator due to their simplicity and low cost but the Power electronic convertors of DFIG are very sensitive to grid side faults. This article presents a new control approach with “Sen” Transformer (ST) for DFIG attached to grid at the time of faults. This ST is used to increase the voltage level of the stator to create the necessary magnetic field to maintain the rotor current under its transient rating. The Microcontroller Based Controlled Unit (MBCU) is monitors the voltage at grid and compensates the required voltage by changing proper taping of ST for continuous operation of DFIG. Simulation results disclose the rotor currents of DFIG stayed within acceptable range for Low Voltage Ride Through.Keywords
DFIG Wind Turbine, LVRT, MBCU, ST, Series Voltage Compensation, Symmetrical Grid Fault.- Analysis of Standalone Analysis of Standalone Hybrid Power Systems with reference to the Reactive Power Management
Abstract Views :142 |
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Authors
Affiliations
1 Electrical and Electronics Engineering, K L University, Vaddeswaram, Guntur District - 520002, Andhra Pradesh, IN
1 Electrical and Electronics Engineering, K L University, Vaddeswaram, Guntur District - 520002, Andhra Pradesh, IN