带感性和容性负载的定子双绕组异步电机变频交流发电系统动态性能

Dual Stator-Winding Induction Generator Variable Frequency AC Generation System with Inductive or Capacitive Loads

为提高定子双绕组异步电机变频交流发电系统带感性和容性负载时的动态性能,对该发电系统现有的转差频率控制策略进行了改进,加入了负载无功前馈环节。根据瞬时功率理论,算得负载的有功和无功,分别通过比例前馈环来快速控制控制绕组侧功率变换器输出电压的频率和幅值,加快控制绕组提供的无功的调节,进而加快改变发电机的转差频率和气隙磁通,实现该发电系统的功率平衡和输出电压的稳定。实验结果证明了该方法的正确性和有效性。

To improve the dynamic performance of the dual stator-winding induction generator （DWIG） variable frequency AC generation system with inductive or capacitive loads,the feed-forward loop of load reactive power is added in the previous slip frequency control strategy.According to the instantaneous power theory,the active and reactive load power are calculated to respectively control the frequency and amplitude of the output voltage of the power converter quickly by the feed-forward loop to fast regulate the reactive power in the control winding,so that the slip frequency and the air-gap flux of the DWIG are adjusted quickly.Therefore,the power balance and output voltage constant are implemented.The experimental results prove the correctness and validity of the proposed strategy.