According to the adverse effects of the multi-harmonic coupling on the power grid, first of all, this paper established the coupling admittance model of multi-harmonic sources, and then, combined with the model for harmonic analysis of transmission and coupling factor analysis. Secondly, according to the coupling relationship between harmonic sources, the decoupling method is proposed in this paper based on SVD (singular value decomposition), which is used to decouple the coupling factor matrix, thus weakening the interaction between harmonic sources. Finally, the decoupling strategy is applied in harmonic transmission and harmonic responsibility partitioning, and the MATLAB / Simulink simulation is carried out through the examples and IEEE 13 node system. The results show that the decoupling algorithm can be used for guidance of harmonic control device allocation optimization and gets more precise responsibility distinguish results, which verifies the validity and feasibility of the theory and algorithm.%针对多谐波耦合对电网带来的不利影响,首先建立了多谐波源的耦合导纳模型,然后结合模型进行谐波传导分析及耦合因子分析.其次,针对谐波源之间的耦合关系,提出基于SVD(奇异值分解)的解耦方法,实现耦合因子矩阵的解耦,使得谐波源之间的相互干扰减弱.最后,将提出的解耦策略应用在谐波传导及谐波责任区分方面,通过实例及IEEE 13节点系统进行MATLAB/Simulink仿真,结果表明:该解耦算法可用于指导谐波治理装置的优化配置以及得到更为精确的责任区分结果,从而验证了理论及算法的有效性与可行性.
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