有源电力滤波器任意次谐波电流检测算法的研究

随着电力电子装置的广泛使用,电力系统谐波污染日益严重,有源电力滤波器是一种消除电力系统谐波污染的重要装置,它的使用将越来越广泛。文章针对三相四线制系统、不平衡系统中有源电力滤波器的应用和混合型有源电力滤波器的特点,基于瞬时无功功率理论,对任意指定次谐波电流的检测和各次谐波正、负序和零序分量的分离方法进行了深入研究。仿真和实验结果验证了此方法的有效性和正确性。

Study on Algorithm for Random Harmonic Current Detection of Active Power Filter

The pollution of harmonic current in power system becomes serious ,with power electronic devices are used widely. As animportant device to eliminate the pollution of harmonics, active power filter (APF) becomes more popular. The harmonic current detectionmethod for three-phase four-wire active power filter and hybrid active power filter has some own characteristics. An algorithm for randomharmonic current detection base on instantaneous reactive power theory is studied in this paper. This new algorithm can detect positive,negative and zero-phase-sequence component of random harmonic current respectively. The result of simulation and experiment prove thevalidity and correctness of the algorithm.