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

摘要: 电力用户的谐波功率检测是配电网谐波溯源和谐波污染评价的基础。本文从电力用户与电网公共连接点的电压和电流取样入手，分析了谐波功率的定义及其检测计算方法，提出一种基于瞬时功率理论的谐波功率快速检测计算方法。对三相电压和电流在谐波频率下进行d-q坐标变换并提取出d-q轴的直流分量，按照瞬时功率理论可计算得到各次谐波的有功功率和无功功率的幅值及流向，根据功率流向可实现电网谐波溯源。建立了典型应用系统的仿真模型，仿真结果验证了谐波功率快速检测算法的正确可行性。

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.

文章引用：王凯, 同向前, 强健, 吴立忞. 用于电网谐波溯源的谐波功率快速检测方法[J]. 智能电网, 2017, 7(4): 286-293. https://doi.org/10.12677/SG.2017.74032

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