Mitigation of sub-synchronous resonance in doubly fed induction generator based wind energy system

A series capacitive compensation in long transmission line is normally used to improve the power capabilities. However, series capacitor may cause sub-synchronous resonance (SSR). This paper analyses sub-synchronous resonance due to series compensated transmission line which is connected to doubly fed induction generator (DFIG) and mitigating the sub-synchronous resonance by improving the rotor side converter (RSC) and grid side converter (GSC) simple and easy to implement control technique of doubly fed induction generator. This study is done on IEEE first benchmark model. The detailed results are obtained by the modelling of the system on MATLAB at different compensation levels. The results prove the effectiveness of control technique and validated the developed model.