变速恒频双馈风力发电机组的逆系统控制研究

摘要

为解决矢量控制方法在双馈风力发电机组中存在的对电机参数比较敏感和在扰动下控制不稳定等问题,将逆系统技术应用到双馈感应发电机(DFIG)的控制中.根据输入/输出状态方程得到了逆系统解析表达式,建立了双馈风力发电逆系统闭环控制.在计算机仿真软件Matlab上对该控制系统在电压跌落时和变速恒频时进行了仿真,仿真结果表明逆系统方法能够控制单位功率因数,保持母线电压稳定,实现有功和无功功率的解耦.%In order to slove the problem that the vector control methods in doubly-fed wind power generation depend on motor parameters and is unstable under disturbance, the technology of inverse system was applied in the control of doubly-fed induction generator( DFIG ).According to the equation of the input and output state,the expression of inverse system was acquired, and the closed-luop control system of wind power generation was established.Through the software Matlab, the system when the phase voltage dropped and operating in variable speed constant frenquency(VSCF) was simulated.The simulation results show that the control system can maintain unity power factor and control the DC link voltage steabily, achieve the decoupling of active and reactive power.