﻿ 用于电网谐波溯源的谐波功率快速检测方法

# 用于电网谐波溯源的谐波功率快速检测方法Fast Detecting Method of Grid Harmonic Power for the Tracing of Harmonic Sources

Abstract: The harmonic power detection in power grid is the basis of harmonic pollution evaluation and harmonic source tracing. With the sampled voltages and currents on the point of common cou-pling of power users with the grid, the definition and the calculation method of harmonic power was analyzed, and a fast calculation method of harmonic power based on instantaneous power theory was proposed. The d-q coordinate transformation of the three-phase voltages and currents under harmonic frequency was carried out first, and the DC component of the d-q axis was extracted with a low-pass filter, then the amplitude and flow direction of active power and reactive power for each harmonic used for tracing the harmonic source can be calculated according to the instantaneous power theory. A simulation model of a typical application system is established for harmonic power detection, and the simulation results verify the correctness of the harmonic power fast detection algorithm.

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