永磁直驱风电系统永磁同步发电机单位功率因数控制

PMSG UPF Control for Direct-Driven WECS

使用永磁同步发电机(PMSG)的直驱风电系统目前发展得很快,选择合适的PMSG控制策略对系统性能非常重要。采用单位功率因数(UPF)控制方法对PMSG进行控制,可以降低永磁直驱风电系统变流器的功率等级,节省变流器容量;同时使用高精度增量式编码器对电机转速和相位进行测量。仿真和试验结果证明了UPF控制策略的有效性。

The development of direct-driven wind energy conversion system （WECS） using permanent magnet synchronous generator （PMSG） is very fast, and the choice of PMSG strategy method is most important for system performance. To reduce the converter power rating of direct-driven WECS, unity power factor（UPF） control method is used to control PMSG, which can save the converter capacity; and the high-precision incremental encoder is adopted to measure the speed and phase angle of the PMSG. Then the validity of the applications of UPF control and encoder in direct-driven WECS is verified by simulation and experiment.