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Renuga, P.
- Fault Ride-through Capability of Permanent Magnet Synchronous Generator Based Wind Energy Conversion System
Authors
1 PG Scholar, EEE Department, Thiagarajar College of Engineering, Madurai-625015, IN
2 Associate Professor, EEE Department, Thiagarajar College of Engineering, Madurai-625015, IN
3 PG Scholar, EEE Department,Kalasalingam University, Madurai-625015, IN
4 Assistant Professor, EEE Department PSG Institute of Technology and Applied Research, Coimbatore -641062, IN
Source
Power Research, Vol 12, No 3 (2016), Pagination: 531-538Abstract
In order to minimize the environmental pollution and to meet the demand of power generation, the electrical power is generated through the renewable energy resources. The wind energy is the massive energy resource compared to other mode of renewable energy resources. This paper deals on the fault ride-through capability of Permanent Magnet Synchronous Generator (PMSG) wind turbines. The main attention in the paper is, to control the PMSG wind turbine and its power converter and to the ability to protect itself without disconnection during grid fault is the main work focused in this project. Also this paper provides the necessary information on the interaction between variable-speed PMSG wind turbines and the power system subjected to faults, such as short circuit faults. The PMSG based WECS is subjected to the grid faults it will cause the oscillations in the DC link voltage at back to back converter. A crowbar and Super Conducting Fault Current limiters (SCFCL) is proposed to supress the DC link voltage oscillations and to enhance the Low Voltage Ride-through (LVRT) Capability of PMSG based wind turbine. To achieve the reactive power support at the grid side the STATCOM is implemented. The simulation results implemented in Matlab/Simulink show that the proposed control strategy not only improves the stability of PMSG by means of suppressing the DC-link voltage oscillation, but also provides a transient stability support to restraint the disturbance of the grid voltage.Keywords
PMSG (Permanent Magnet Synchronous Generator), DC link voltage, grid faults.
- Application of Fuzzy Logic - Particle Swarm Optimization for Reactive - Power Compensation of Radial Distribution Feeders
Authors
1 Department of Electrical and Electronics Engineering, K.L.N. College of Engineering, Anna University, Madurai, Tamil Nadu-630611, IN
2 Department of Electrical and Electronics Engineering, Thiagarajar College of Engineering, Anna University, Madurai, Tamil Nadu-625015, IN
3 Department of Electrical Engineering, Higher Institute of Engineering, Hoon, LY
Source
Power Research, Vol 6, No 2 (2010), Pagination: 15-23Abstract
Electric distribution systems are becoming large and complex leading to higher system losses and poor voltage regulation. This has stressed the need for an efficient and effective distribution network The objective of this work is to determine optimal location and size of the capacitor to be placed in radial distribution feeders to improve the voltage profile and to reduce the energy loss. This problem of capacitor placement is solved using fuzzy expert system and sizing is solved using particle swarm optimization method.
Firstly, an efficient load flow solution for the radial feeder is obtained by forward sweeping algorithm. Voltage and real power loss index of distribution system nodes are modeled by fuzzy membership function. Then, a fuzzy inference system containing a set of heuristic rules is designed to determine candidate nodes suitable for capacitor placement in the distribution system. Capacitors are placed on the nodes with highest sensitivity index. The sizing is found by using Particle Swarm Optimization (PSO). The proposed method is tested on IEEE-11kV, 12 bus system (without lateral) and an existing 15 bus system (with lateral) in India.