Auxiliary Control Method for Reducing Vibration of Drive Train of Wind Turbine Caused by Primary Frequency Regulation

Abstract

The primary frequency regulation of the wind turbine can reduce the frequency deviation of the power system to improve the stability of the frequency. However, the primary frequency regulation increases the vibration of the WT's drive train. In this study, auxiliary damping control is proposed to mitigate the vibration of the drive train caused by primary frequency regulation. Firstly, the influence of frequency regulation on the torque of the drive train is analyzed. Then an additional damping control method is proposed, and the influence of the control parameters on the control effect is analyzed. Finally, the effectiveness of the control method is verified by simulation under different wind speeds. The results show that under the same frequency performance, the proposed method can reduce the standard deviation of the drive train torque by more than 50%.