电气工程学报 ›› 2018, Vol. 13 ›› Issue (6): 36-41.doi: 10.11985/2018.06.006

• 工程技术 • 上一篇    下一篇

750kV变压器Π型接地环流分析与抑制研究

李山1,李伟2,吴标1,张媛1,周利兵1,公多虎1   

  1. 1. 国家电网新疆电力公司电力科学研究院 乌鲁木齐 830011
    2. 贵州理工学院电气与信息工程学院 贵阳 550003
  • 收稿日期:2018-02-26 出版日期:2018-06-25 发布日期:2018-06-25
  • 作者简介:李 山 男 1982年生,高级工程师,主要从事电力系统分析、电磁暂态过电压方面的研究。|李 伟 男 1973年生,博士,高级工程师,主要从事高电压与绝缘及故障诊断技术方面的研究。

Study of Analysis and Suppression on Grounding Circulation Current of 750 kV Transformer Π Grounding

Li Shan1,Li Wei2,Wu Biao1,Zhang Yuan1,Zhou Libing1,Gong Duohu1   

  1. 1. State Grid Xinjiang Electric Power Company Electric Power Research Institute Urumqi 830011 China
    2. Guizhou Institute of Technology Guiyang 550003 China
  • Received:2018-02-26 Online:2018-06-25 Published:2018-06-25

摘要:

针对750kV变压器中性点Π型接地产生较大接地环流的现象,建立接地环流数学模型,并分析了接地环流大小及其影响因素;实测接地环流并建立接地环流与负载电流的相关关系,提出了接地环流抑制措施,并通过实测电阻参数对比计算改造前后接地电流的变化,接地环流消除并与实测结果一致,从而充分验证了关于接地环流理论分析的正确性和抑制措施的有效性。

关键词: 750kV变压器, 中性点Π型接地架构;, 接地环流, 数学模型, 抑制

Abstract:

To larger grounding circulation current (GCC) produced by 750kV transformer neutral Π type grounding, GCC mathematical model is fabricated, its GCC value and factors are analyzed. Real GCC is measured, its relation is built to load current, and so GCC suppression measure is put forward. Real resistance parameters is used to analyze the GCC change before and after modification, and it is found that GCC is eliminated and consistent with real measured result. The correct theoretical analysis and valid suppression measure are fully tested with related to the GCC of 750kV transformer neutralΠtype grounding.

Key words: 750kV transformer, neutral Π type grounding;, grounding circulation current (GCC), mathematical model, suppression

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