考虑谐波源支路类型的谐波谐振分析方法

建立准确的系统节点导纳矩阵是分析电力系统谐波谐振问题的前提条件，其中不同的谐波源建模方法将影响节点导纳矩阵参数，进而影响系统的谐波谐振分析结果。文中首先考虑实际谐波源类型，按谐波源支路有无阻抗、支路为串联或并联支路形成了4种谐波源支路类型；然后推导了考虑不同谐波源支路类型的节点导纳矩阵的建立方法，所建节点导纳矩阵对串联谐振和并联谐振分析均适用；分别运用谐振模态分析法及节点电压法对系统进行并联谐振和串联谐振分析，可揭示系统中更多潜在的串、并联谐振频率，并且在分析串联谐振时矩阵维数较低，易于建模，分析方法统一。测试系统和工业配电系统均证明了所提出方法的正确性和适用性。

Harmonic Resonance Analysis Method Considering Branch Type of Harmonic Source

The establishment of accurate node admittance matrix of the system is a precondition for analyzing the harmonic resonance problem of power system. Different harmonic source modeling methods will affect the parameters of node admittance matrix and further affect the harmonic resonance analysis results of the system. The type of actual harmonic source is first considered, and four branch types of harmonic source are formed according to whether the harmonic source branch has impedance or not, and the branch is a series or parallel branch. Then, the method of establishing the node admittance matrix considering the branch types of different harmonic sources is deduced, which is applicable to both series resonance and parallel resonance analysis. Resonance modal analysis and node voltage method are used to analyze the parallel resonance and series resonance, respectively, which can reveal more potential series and parallel resonant frequencies in the system. When analyzing series resonance, the matrix dimension is low, the model is easy to build and the analysis method is unified. Both the test system and the industrial power distribution system prove the correctness and applicability of the proposed method.