间谐波源对地导纳对配电网并联谐振影响研究
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作者单位:

1.武汉大学电气与自动化学院;2.国网福建省电力有限公司电力科学研究院

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TM711?

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国家电网公司总部科技项目


Research on influence of admittance of inter-harmonic sources to ground on parallel resonance of distribution network
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1.School of Electrical Engineering and Automation, Wuhan University;2.Fujian Power Co., Ltd. Electric Power Research Institute

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    摘要:

    间谐波源对地导纳幅值很小,因此传统并联谐振分析一般忽略间谐波源对地导纳。但是,如果间谐波源对地导纳对并联谐振的贡献程度较高,那么忽略间谐波源对地导纳可能会使并联谐振分析结果的准确性严重下降。为证明并联谐振分析计入间谐波源对地导纳的必要性,该文基于IEEE-33节点配电网模型建立了并联谐振测试系统,开展了间谐波源对地导纳对配电网并联谐振影响的研究。文中基于模态分析法发现特定节点处间谐波源对地导纳能够明显影响并联谐振,通过进行灵敏度分析,发现在特定节点处间谐波源对地导纳虚部对并联谐振的贡献程度较高,解释了间谐波源对地导纳明显影响并联谐振的原因,最终证明了并联谐振分析计入间谐波源对地导纳的必要性。

    Abstract:

    The admittance amplitude of inter-harmonic sources to ground is very small, so traditional parallel resonance analysis generally ignores the admittance of inter-harmonic sources to ground. However, if the admittance of the inter-harmonic sources to ground contributes to the parallel resonance to a higher degree, ignoring the admittance of the inter-harmonic sources to ground may seriously reduce the accuracy of the parallel resonance analysis results. In order to prove the necessity of the parallel resonance analysis to include the admittance of inter-harmonic sources to ground, this paper establishes a parallel resonance test system based on the IEEE-33 node distribution network model, and carries out the research on the influence of admittance of inter-harmonic sources to ground on the parallel resonance of distribution network. Based on the modal analysis method, it is found that the imaginary part of the inter-harmonic source-to-ground admittance at a specific node contributes a higher degree to the parallel resonance. Through sensitivity analysis, it is found that the admittance imaginary part of inter-harmonic sources to ground at a specific node contributes a higher degree to the parallel resonance, which explains the reason why the admittance of inter-harmonic sources to ground can obviously affect the parallel resonance, and finally proves the necessity of including the admittance of inter-harmonic sources to ground in the parallel resonance analysis.

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  • 收稿日期:2021-04-06
  • 最后修改日期:2021-06-16
  • 录用日期:2021-07-26
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