In this controller, the instantaneous reactive power theory and synchronous reference frame transformation are adopted in VAR detection algorithm.The controller is stable in control and good at EMC.

• 该控制器将瞬时无功理论和同步旋转坐标变换运用到无功检测算法中，所设计的控制器控制性能稳定、现场抗干扰能力强；