关键词: 双馈电机, 非线性控制, 滑模控制, 反馈线性化控制, 解耦控制

Abstract: According to the poor decoupling phenomenon and motor parameters dependent problem of doubly-fed wind turbine controlled by the traditional vector, this paper puts forward nonlinear control strategy based on sliding mode variable structure control and feedback linearization control. The control principle and the advantages and disadvantages of the two strategies are analyzed in details. Under PSCAD environment, the nonlinear control strategy is applied to DFIG vector control to establish the system model. Simulation results show that the proposed strategy can achieve the maximum power point tracking, and active and reactive power decoupling of doubly-fed wind power generation system. Comparative analysis of simulation results proves good decoupling effect. The system based on sliding mode control has stronger global robustness than the feedback linearization control system. The study establishes the foundation for the control system design and implementation of the doubly-fed generator.

Key words: doubly-fed induction generator, nonlinear control, sliding mode control, feedback linearization control, decoupling control