Harmonic source tracing of distribution network is the base of harmonic management and pollution responsibility evaluation. In this paper,basing on three types of typical conditions of equivalent circuit and harmonic existence of distribution network,and take the public connection point of the single user and power supply system as the boundary,the relationship between harmonic power and harmonic pollution source across public connection point is analyzed,pointing out that the flow of single harmonic active power reflects location of harmonic pollution source in distribution network. Considering time-varying characteristics of the harmonic sources,a method of harmonic source tracing based on single harmonic net energy and total harmonic net energy is proposed.%配电网谐波溯源是配电网谐波管理与污染责任评估的基础.本文从配电网谐波等值电路和谐波存在的3种典型工况出发,以单一用户与供电系统的公共连接点为界,分析了穿越公共连接点的谐波功率与谐波污染源的关系,指出单次谐波有功功率的流向反映了配电网谐波污染源的位置.考虑到谐波源的时变特征,提出了基于单次谐波净能量和总谐波净能量的谐波溯源方法.
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