新型单周控制三相四线制有源电力滤波器

单周控制有源电力滤波器具有检测量少、控制器结构简单以及鲁棒性强等优点。基于双极调制方式的单周控制三相四线制有源电力滤波器以峰值电流检测的控制方式和纹波电流的存在导致补偿后的电源电流中含有直流分量。文中提出一种基于单极调制方式的新型单周控制三相四线制有源电力滤波器能够有效抑制直流分量的产生,同时降低了开关损耗。仿真结果验证了理论分析的正确性。

A Novel Three-Phase Four-Wire Active Power Filter with One-Cycle Control

Active Power Filter (APF) with one-cycle control has such merits as few quanta need to be detected, simple control circuitry and robustness. There are DC off-sets in the compensated source current of the three-phase four-wire APF with one-cycle control under bipolar modulation due to the existent ripple and the peak current detection. A novel three-phase four-wire APF with one-cycle control under unipolar modulation is proposed which can suppress the DC off-sets as well as reduce the swithing loss. The validity of the theoretic analysis has been certified by the simulation.