GIS中金属微粒诱发沿面局部放电发展过程的研究
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TM855

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国家自然科学基金委员会-智能电网联合基金资助项目(U1766218)


PD creeping discharge development process induced by metallic particles in GIS
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    摘要:

    局部放电的检测和识别对气体绝缘全封闭组合电器(GIS)运行状况的监测起着至关重要的作用。金属微粒缺陷是一种极易引发GIS局部放电的典型缺陷。文中主要研究金属微粒诱发的GIS内局部放电沿面爬电的发展过程。为此,根据GIS实际运行条件,搭建GIS模拟实验平台,采用阶梯升压法划分试验阶段,利用脉冲电流法检测各阶段下的局部放电模式,与此同时架设增强型电荷耦合检测器相机(ICCD)实时记录金属微粒局部放电的沿面发展过程,并采用K-Means聚类算法结合特征参量对其发展过程进行划分。结果表明GIS盆式绝缘子上金属微粒的沿面局部放电演变过程分为3个阶段:电晕放电主导阶段、电晕与流注放电并存阶段和流注放电主导阶段。

    Abstract:

    Partial discharge (PD) detection and recognition are of great significance to the condition monitoring of gas-insulated switchgear (GIS). Metallic particles defects are a type of defect that are easy to occur in GIS. The study focuses on the development process of PD creeping discharge induced by metallic particles in GIS. A GIS simulation experiment platform which is set up according to the actual operating conditions of GIS is employed for this. Step up method is applied to study the PD of metallic particles. The discharge pattern of various stages is measured by pulse current method, meanwhile the characteristic parameters which can characterize the severity of PD effectively are extracted. Intensified CCD (ICCD) is also set up to record the evolution process of PD creeping discharge of the metallic particles, meanwhile the development process is divided with K-Means clustering algorithm combined with characteristic parameters. The results indicate that the evolution process of PD creeping discharge induced by metallic particles in GIS is divided into three stages: corona discharge domination, coexistence of corona discharge and surface streamer discharge and surface streamer discharge domination.

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陈予伦,常丁戈,杨鼎革,张冠军. GIS中金属微粒诱发沿面局部放电发展过程的研究[J].电力工程技术,2021,40(3):153-158

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  • 收稿日期:2020-12-07
  • 最后修改日期:2021-01-19
  • 录用日期:2020-08-17
  • 在线发布日期: 2021-06-11
  • 出版日期: 2021-05-28