Voltage Control of Fixed Speed Wind Farm Under Unbalanced Grid Faults Using DVR

Increase of wind penetration in power system affects the power quality. This power quality problem causes nascent issue in power system. This work focus on the power quality problem due to injection of wind system into grid. Voltage sag occurs due to three phase to ground fault in wind generator. In the proposed scheme Dynamic Voltage restorer plays a major role to mitigate voltage sag and protect the power grid from disconnection of the wind generator. The proposed DVR control scheme is based upon Synchronous reference frame theory. The effectiveness of the proposed scheme makes the system to be in service even in the presence of fault. The study of DVR with wind energy generation system for power quality improvement has been proposed using MATLAB/SIMULINK software and better results are achieved.

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