并联有源电力滤波器LCL参数的选择方法

摘要

并联型有源电力滤波器(shunt active power filter,SAPF)中应用LCL滤波器有高频阻带性能好、低频补偿能力强等优点,但参数确定难.本文基于对补偿对象及补偿目标的数字化建模,结合PWM控制特性和谐振影响,给出LCL滤波器参数选择方法,最后分析参数选择对系统性能的影响.该方法简单实用.仿真和实验证明了该方法的有效性.%LCL -filter in shunt active power filter is characterized by better attenuation performance at high frequency and better compensation performances. But it is difficult to define parameters. Based on the modeling of compensation object and target, this paper proposes a new design method of LCL - filter and puts forward the relations among parameters for compensation performance according to the characteristic of PWM technology and resonance. This method is simple and useful. Simulation and experiment validate the feasibility of the method.