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The Scientific World Journal
Volume 2015, Article ID 367540, 10 pages
http://dx.doi.org/10.1155/2015/367540
Research Article

Simulation and Study of Power Quality Issues in a Fixed Speed Wind Farm Substation

Department of EEE, R.M.K Engineering College, Kavaraipettai, Tamil Nadu 601 206, India

Received 4 December 2014; Accepted 25 February 2015

Academic Editor: Rodolfo Dufo-López

Copyright © 2015 T. Magesh and C. Chellamuthu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Power quality issues associated with the fixed speed wind farm substation located at Coimbatore district are investigated as the wind generators are tripping frequently. The investigations are carried out using two power quality analyzers, Fluke 435 and Dranetz PX5.8, with one of them connected at group control breaker of the 110 kV feeder and the other at the selected 0.69 kV generator busbar during the period of maximum power generation. From the analysis of the recorded data it is found that sag, swell, and transients are the major events which are responsible for the tripping of the generators. In the present study, simulation models for wind, turbine, shaft, pitch mechanism, induction generator, and grid are developed using DIgSILENT. Using the turbine characteristics, a two-dimensional lookup table is designed to generate a reference pitch angle necessary to simulate the power curve of the passive stall controlled wind turbine. Various scenarios and their effects on the performance of the wind farm are studied and validated with the recorded data and waveforms. The simulation model will be useful for the designers for planning and development of the wind farm before implementation.