The SSR Mitigation with Energy Storage in the DFIG Based Series Compensated Wind Power System

Abstract

The Sub-synchronous resonance (SSR) in the series compensated wind power system has greatly threatened the safety and the stability of the electrical power system. It is caused by the interaction between the doubly-fed induction generator (DFIG) and the series compensated capacitor. However, few researches focus on the application of the energy storage in the wind farms to mitigate the SSR. In this paper, the additional SSR damping control strategy applied with energy storage is proposed. The effectiveness of the proposed control strategy is verified with the PSCAD model. The results demonstrate that the sub-synchronous current could be suppressed successfully. Therefore the damping of the series compensated wind power system at the sub-synchronous frequency can be greatly improved.