基于单周控制三相四线制APF的研究

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

以四桥臂三相四线制有源电力滤波器(APF)为研究对象,针对APF中畸变电流检测的快速实时响应问题,研究APF的单周控制原理与控制策略,提出三相四线制APF的单周控制模型。在分析单周控制四桥臂三相四线制APF开关周期平均模型的基础上,推导出单周控制的关键方程,该方程组描述了在CCM运行模式下电源电流、开关占空比与电压调节器输出电压3个量之间的关系。基于该方程组的一个最简解,建立了单周控制电路模型。最后设计单周控制APF,并对其进行了仿真及实验研究。实验结果表明,该方法实时性好,控制电路结构简单、动态特性好。

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.