【摘要】 电力有源滤波器是补偿电力系统谐波及无功功率的重要装置,其关键的环节是实时准确地检测出谐波电流。介绍了ip-iq法的基本原理,在此基础上提出了一种适用于三相四线制系统的任意次谐波电流的无锁相环的检测新方法,该方法可以实现对三相四线制不对称系统任意次谐波的正序、负序分量和零序分量的检测,最后将检测得到的正序、负序和零序相加就可以得到任意次谐波电流,理论分析和仿真结果都证实了本文所提出的新方法的准确性。更多还原

【Abstract】 Active Power Filter is an important device to eliminate the pollution of harmonic,the key problem in APF is to detect the harmonic current accurately in real-time mode.This paper presents the principle of harmonic current detection and puts forward a new detection method without phase lock loop(PLL).This algorithm which is based upon the traditional method can detect positive and negative sequence component of random harmonic current respectively,also can detect the zero phase sequence current component.The detected positive,negative phase sequence can be summed up to obtain the random harmonic current.Analysis and simulation prove the correctness of the algorithm.更多还原