Harmonic analysis and mitigation in wind power plants

Renewable energy sources have gained a lot of importance in the recent past due to its availability in abundance and pollution free nature. Wind Power Generation compared to the other renewable energy sources has developed at a rapid pace. Like most of the conventional Power plants, Wind Power plants must ensure the quality of power delivered to the grid. Harmonics are the most important Power Quality Issues related to the Wind Power plants which occur due to frequent switching of the Power Converters and variable Wind speed. This paper presents the Harmonic analysis in the SCIG and DFIG Wind Farms. A 42 MW Wind plant was considered for analysis and a suitable strategy was adopted to reduce the Harmonic content. The analysis and design were carried according to the Indian Grid Codes. The results obtained indicate the Power Quality of the SCIG and DFIG Wind Farm with respect to %THD (Total Harmonic Distortion).