检测单相系统谐波电流和无功电流的一种新方法

A Novel Detection Approach to Harmonic and Reactive Currents of a Single-phase System

针对单相系统谐波电流和无功电流检测中存在的问题,提出一种新的检测方法:基于瞬时无功功率的虚拟三相法。通过理论分析和仿真实验论证,表明这种算法能有效解决单相系统和三相不平衡系统中谐波电流和无功电流检测中存在的问题,且检测精度高,动态响应快。

In order to detect the harmonic and reactive currents of a single-phase power system, a new method is proposed in this paper. Our active power measurement is based on the virtual three-phase method and instantaneous reactive power theory. The theoretical analyses and simulation experiments indicate that the new algorithm can accurately detect the typical harmonic currents, especially for the harmonic current and reactive current detection of a single-phase load or a three-phase unbalanced system.