双馈风力发电机最优控制方法研究

Study of Optimal Control for Doublely-fed Induction Generator

大型并网风力发电机运行中要求发电机功率输出能快速跟踪给定值且电功率波动最小。本文在双馈感应发电机矢量控制动态模型基础上进行扩展,设计了最优输出调节器,并与常规PID控制及普通最优输出控制进行了比较。仿真结果表明,控制效果明显好于前两者,并且对大功率负载投切甚至线路终端故障引起的母线电压扰动有很好的抑制作用。

The objective of grid-tied wind-powered generator control is to trace the power output reference rapidly and reduce its fluctuation simultaneously.A linear-quadratic optimal controller is developed based on the augmented vector control dynamic model of double-fed induction generator.The simulation results demonstrate that the system with the optimal controller has better performance than the one with PID controller or with regular optimal output controller,and it can depress grid voltage disturbance causing by line fault or cutting in and out of load.