有源电力滤波器2种电流检测方法的仿真研究

Simulation Study of Two Different Detecting Approaches of Active Power Filter

研究了有源电力滤波器的2种谐波电流检测算法:p、q检测法和ip、iq检测法,对2种检测方法进行了理论分析并利用MATLAB中的电力系统仿真工具箱对其进行建模与仿真比较研究。仿真试验结果表明,当电网电压平衡时,两者皆可准确地检测出谐波电流。当电网电压非平衡时,ip、iq检测法能有效检测出谐波信号。

p ,q a comparative study of two different detecting methods for active power filter： the detecting method and the ip ,iq detecting method. Theory analysis of the two methods is given, models of filters are built and simulated with the help of electric system simulation toolbox of MATLAB. The experimental results shows that when the voltage balance, the two detecting methods can both accurately detect the harmonic currents. When the voltage non- equilibrium, the ip ,.iq method is an effective test to detect harmonie signals.