风力发电用双馈感应发电机控制策略的研究

STUDY ON THE CONTROL STRATEGY OF DOUBLYFED INDUCTION GENERATORS FOR WIND ENERGY GENERATION

该文从并网风力发电系统的基本特性出发,在分析双馈感应电机数学模型及其定子磁链定向矢量控制的基础上,论证了其有功功率和无功功率的独立控制的可行性并给出了PID双闭环控制方案。利用Matlab/SimulinkTM平台,仿真研究并验证了该控制方案的正确性,对实际软硬件系统的设计与调试具有一定的指导意义。

With the development of wind energy generation towards variable pitch control and variable-speed constant-frequency operation using generators with higher power ratings, doubly-fed induction generators (DFIGs) with AC-excitation has been extensively studied and widely applied. According to basic features of wind energy generation systems, in this paper, a dual-closed-loop PID control scheme is developed and realizes the control strategy of maximum wind energy capture and independent reactive power control, which is based on the mathematical model of DFIGs and their stator-flux-oriented vector control. Simulation study is carried out on the platform of Matlab/Simulink and validates the correctness of the proposed strategy, which will guide designing and debugging the practical software and hardware systems.