Implementation of Wind Energy Systems to the Existing Power Grid
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Steady state and transient analysis of a Doubly Fed Induction Generator(DFIG) belonging to a Wind Power Generator is performed. Firstly, the steady state model of the DFIG is derived, and based on the DFIG characteristics, its steady state operating condition is determined. Also, the control strategies that determine the gating signals to the Back to Back Converter (BBC) are described. Secondly, the transient model of the DFIG is derived, and its transient characteristics are analyzed and simulated for a three phase metallic fault. The results of the transient analysis are obtained using both the analytical model and DFIG wind turbine model in Matlab/Simulink software. The study shows the significance of protecting the Back to Back converter during the occurrence of a fault.