Continuous twisting damping Control of DFIG-Based Wind Farm to Improve Interarea Oscillation Damping

Aiming at the interarea oscillation problem of large power system with doubly-fed induction generator (DFIG) connected, an additional damping control strategy of DFIG wind farm based on continuous twisting algorithm is proposed in this paper. Firstly, according to a modified two-area power system with DFIG the dynamic mode of power system is established. Then, the speed difference of the synchronous generator (SG) is selected as input signal and employed in the reactive power control with the rotor side converter (RSC) of DFIG. Finally, the proposed damping control is applied to a modified two-area power system and a modified 39-bus power system to verify the effectiveness. Simulation results show that the strategy is superior to the strategy without conventional power system stability (PSS) and the strategy with conventional PSS in stability effect and robustness.