基于谐波有功功率贡献量的主谐波源定位

为了准确辨识和定位主谐波源,提出了一种基于谐波有功功率贡献量的方法。该方法综合考虑谐波电压和谐波电流的影响,不仅能够定量地划分各自的谐波责任,准确地判断出主谐波源的位置,而且克服了使用谐波电压贡献量或谐波电流贡献量进行主谐波源定位时存在的局限性。首先推导了系统侧和用户侧单独作用时对PCC处谐波有功功率贡献量公式,然后推广到多谐波源系统中,并建立了通用的数学模型,从理论上实现了对主谐波源的定位。最后以两个非线性用户系统为例进行Matlab/Simulink仿真分析,仿真结果与理论分析相一致,验证了该方法的正确性与有效性。

Localization of the main harmonic source based on the harmonic active power contributions

In order to accurately identify and locate the main harmonic source, this paper proposes a method based on the active power harmonic contributions. Synthetically considering the influence of harmonic voltage and harmonic current, the method can quantitatively divide their harmonic responsibility and accurately determine the position of the main harmonic source. And it also overcomes the limitations in the main harmonic source localization by using the harmonic current or harmonic voltage contributions. Firstly, the calculation equation of the harmonic active power contributions on PCC which are from the system and the user side alone are deduced, then extended to the multi-harmonic source system. A general mathematical model is constructed, with which the position of the main harmonic source can be located theoretically. Finally, a simulation model with two nonlinear users as a research object is built and simulated in Matlab/Simulink. The simulation results are consistent with the theoretical analysis, and it verifies the correctness and validity of the method.