双馈风力发电系统转子侧PWM变换器及其对双馈感应发电机的运行控制

摘要

First, established the mathematical models of Doubly-fed Induction Generator (DFIG) in a synchronous rotating coordinate system, and thus analyzed the operating performance of the DFIG, the power relationship and control objectives. Then designed the control strategy of rotor side PWM converter based on the orientation of the stator voltage, and finally established experimental platform of double-fed wind power generation system based on Infineon' s XC2785 microcontrollers to ensure the double-fed wind power generation system can run in the sub-synchronous, synchronous and super-synchronous states, and to achieve the stator side of the variable speed constant frequency and adjustable power factor, the experimental results verified the feasibility and correctness.%首先建立了双馈感应发电机(Doubly-Fed Induction Generator,DFIG)在同步旋转坐标系下矢量形式的数学模型,并以此对DFIG的运行性能、功率之间的关系及控制目标进行分析,在此基础上设计出以定子电压定向的转子侧PWM变换器控制策略,最后建立了基于英飞凌XC2785单片机的双馈风力发电系统试验平台,使双馈风力发电系统能在次同步、同步和超同步三种状态下运行,并实现定子侧变速恒频和功率因数可调.试验结果验证了该方案的可行性和正确性.