变速恒频双馈风力发电系统仿真研究

Research on VSCF Doubly Fed Wind Power Generation System

阐述变速恒频双馈风力发电系统工作原理,在分析双馈异步发电机的动态数学模型的基础上,介绍了一种基于定子磁链定向的矢量控制方法,实现对电机的有功功率和无功功率的解耦控制,进而实现最大风能追踪。在DFIG转子励磁电源的研究中,重点讨论基于电网电压定向矢量控制技术的网侧变换器的控制方法,以实现网侧变换器交流侧单位功率因数控制和直流环节电压控制。Matlab仿真结果证明了控制策略的正确性和有效性。

This paper introduced the VSCF wind power generation system based on doubly-fed induction generator, described the operation theory of the system, used vector control method of the stator flux Chain-oriented to realize the active power and reactive power decoupling control after analyzing the dynamic mathematical model of DFIG, and thus achieved the purpose of tracking maximum wind power. In the study of rotor excitation power, focused on the control methods of gird-side converter based on grid-based voltage-oriented vector control technology, in order to achieve unity power factor and control dc link voltage. The results of simulation using Matlab proved the correctness and effectiveness of the control method.