DiffTune-PI Based Vector Control of Doubly Fed Induction Generator for Grid-connected Operation

Zhiwei Li, Gaihui Wang, Dan Wang, Liyu Lu, Zhouhua Peng, Haoliang Wang

Abstract: Due to the unstable feature of wind energy, the fixed parameter control cannot meet the demand of doubly fed induction generator (DFIG) system for wind power generation well.In this paper, for the control of DFIG under grid-connected operation conditions, a vector control method with stator voltage orientation based on DiffTune-PI algorithm is proposed.The control parameters of the PI controller are optimized online by the DiffTune algorithm and the disturbance term is compensated by feed-forward compensation. Simulation results show that the proposed method can effectively suppress the power and voltage fluctuations of the DFIG system under grid-connected operation conditions with excellent dynamic and static performances when generator starts, the grid voltage drops and the input wind speed drops.

Submission Number: 124