一种PMSG的近似UPF控制方法研究

Research on a Kind of PMSG Approximate UPF Control Method

永磁同步发电机目前在各种驱动系统中的应用越来越多,采用单位功率因数控制方法对PMSG进行控制,可以降低变流器的功率等级,但是常规的UPF控制实现比较复杂。采用一种近似UPF控制方法,在电机参数满足一定假设条件的情况下,对PMSG的UPF控制方法进行简化,并将这种方法应用于永磁直驱风电实验系统中。仿真和实验结果证实了所采用的PMSG近似UPF控制策略的有效性。表明所提出的近似UPF控制策略可以基本实现永磁直驱风电系统PMSG的单位功率因数控制,获得良好的控制效果。

The application of permanent magnet synchronous generator （PMSG） in adjustable-speed drive system is more and more, the converter power rating can be reduced by using unity power factor （UPF） control strategy, however the realization of conventional UPF control is much complicated. A kind of approximate UPF control method was adopted to simplify the UPF control of PMSG, when the motor parameters meet some certain assumption, and the proposed method was applied in direct-driven wind energy conversion system （WECS） with PMSG. Then the validity of the approximate UPF control method is verified by simulation and experiment. It is proved that the proposed approximate UPF control method can basically achieve UPF control of PMSG for direct-driven WECS and have good control performance.