Research on the Three-phase Four-wire System APF Based on One-cycle Control

Based on the four bridge arm APF of three-phase four-wire system as the research object,aiming at the problem of APF distortion in the current real-time response to the rapid detection,APF in the one-cycle control theory and control strategy are researched,and the one-cycle control model of the four bridge arm APF of threephase four-wire system is proposed.The paper also explains the theory of OCC APF in running principle,and then derives the equations of three-phase four-wire control system with four bridge arm APF.An experimental study is conducted,the experimental results show the method has good real-time quality,simple control circuit structure and good dynamic characteristics.