三相四线制有源电力滤波器的研究

单周控制方法已经在有源电力滤波器中得到了一定的应用,文章将四桥臂三相四线制有源电力滤波器的主电路分为三相桥和N相半桥两个独立的子电路,同时为了降低三相桥的开关频率,对其采用矢量单周控制模式,而N相半桥仍采用一般的单周控制方式。推出了各自的控制方程和控制电路,并进行整体电路的仿真研究。采用该方法电路简单,不仅可以有效地补偿系统的三相谐波电流、补偿中线电流,还可以减少开关损耗。

A Study on Three-phase Four-wire Active Power Filter

This paper proposes partitioning the main circuit of three-phase four-wire APF with four-leg into two sub-circuits.In order to reduce the switch frequency,three-phase bridge is controlled by one-cycle control method with vector operation,but N-phase half-bridge is still based on the ordinary one-cycle control.After the control equations and control circuits of each sub-circuit are set up,the simulation of overall circuit is studied,which shows the control circuit is very simple,can compensate the neutral current as well as three-phase harmonic and reactive currents effectively,and it can reduce the loss of switches in APF.