变速恒频双馈风力发电机的最大风能追踪控制

Maximum Wind Power Tracking Control of Variable Speed Constant Frequency Doubly-fed Wind Turbines

为了最大限度的利用风能,提高风力发电系统的效率,提出了一种不依赖于风速测量的最大风能追踪和转换策略。通过模糊逻辑控制器的设计得到低风速时发电机的参考转速,模糊自适应控制器作为直接转矩控制系统速度调节器的基本组成单元,从而使发电机转速跟踪风速。最后,利用Matlab软件对1MW双馈型风电机组的运行性能进行了分析和比较。仿真结果表明,在风速变化时,控制器可以使发电机转速跟踪最佳理论值,系统性能稳定,达到了预期的控制目标。

For maximal utilizing wind power, improving efficiency of wind power generating systems, a method and conversion strategy that is not dependent on detecting wind speed was proposed. It designs a fuzzy logic controller that obtains reference rotation of generator below rated wind speed,fuzzy adaptive controller is the basic constitute unit of direct torque control system speed regulator,and the rotation of generator may track wind speed quickly. At last, the proposed method is simulated with Matlab based on 1 MW doubly-fed wind turbine prototype. The simulation results show that when changes in wind speed, actual rotation speed of gen- erator tracks optimal oretieal value quickly,performance of system is stable, reaching the prospective target of control.