基于自适应逆控制的有源滤波器的检测算法

提出一种新的并联型电力有源滤波器的检测方法,通过控制有源滤波器直流电容电压来确定电网电流所需的基波有功分量的幅值,首次将自适应逆控制用于电力有源滤波器.将系统的主电路部分及有源滤波器看作广义有源滤波器,通过自适应逆控制方式控制直流电容电压,使其输出跟随参考输入,最终达到抑制谐波和补偿无功的目的.此检测算法简单有效,稳态和暂态的仿真结果均证实了该算法的可行性.

Detection Approach of Active Filter Based on Adaptive Inverse Control

A detection approach of the shunt active power filter is proposed based on adaptive inverse control. The value of the fundamental active current needed by the mains current is determined through controlling the DC capacitor voltage. The supply system with the load and the APF are regarded as the generalized active filter and the inverse of its model is used as the controller to control DC capacitor voltage. The output voltage of the DC capacitor traces the reference voltage input and the harmonic currents can be suppressed and the reactive power can be compensated. The proposed approach is simple and valid. Simulation results under steady state and transient state show the effectiveness of the proposed method.