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Optimization Design of Grounding Sealing Structure of 220kV GIS Basin Insulator
编号：161 访问权限：仅限参会人 更新：2022-08-29 11:52:47 浏览：103次 口头报告

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摘要
The surface flashover of basin insulator is an important factor causing SF6 gas insulated switchgear (GIS) equipment failure. The main cause of surface flashover is the local electric field distortion caused by unreasonable structural design, defects, foreign matters and surface charge accumulation. Thus, the optimization of insulator electric field structure design is very important. Generally, the permissible value of electric field strength focuses on the shielding electrode surface and insulator surface in the structure design. Previous studies have not paid enough attention to the electric field distribution at the grounding terminal. This paper studies the influence of two methods on the surface electric field strength distribution of grounding terminal, one is setting a gas gap on the contact surface between basin insulator and shell flange, and the other one is inserting a shielding ring into insulator near grounding flange. The results show that changing the height of gas gap, radial distance and radius of shielding ring could effectively optimize the electric field distribution, but the optimization effect of shielding ring is better than that of gas gap. The shielding ring could suppress the maximum electric field strength at grounding area from 29.36kV/mm to 6.71kV/mm, while the gas gap could only suppress it to 14.24kV/mm. For 220kV GIS basin insulator, the height is recomanded as 2mm when using the method of setting gas gap, and a radial distance of 170mm and a radius of 3mm is recommended for shielding ring. Therefore, it is suggested to choose the grounding shielding ring to optimize the electric field distribution of 220kV GIS basin insulator.
关键词
GIS basin insulator,surface flashover,structural optimization,structural design,electric field optimization
报告人
Lin Liu
South China University of Technology

稿件作者
Jiaming Xiong Electrical Power Research Institute of CSG
Lin Liu South China University of Technology
Yanpeng Hao South China University of Technology
Chao Gao Electrical Power Research Institute of CSG
Ruodong Huang Electrical Power Research Institute of CSG
Fusheng Zhou Electrical Power Research Institute of CSG
Yun Yang Electrical Power Research Institute of CSG
Guoli Wang Electrical Power Research Institute of CSG
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重要日期

  • 会议日期

    09月25日

    2022

    至

    09月29日

    2022

  • 08月15日 2022

    提前注册日期

  • 09月10日 2022

    报告提交截止日期

  • 11月10日 2022

    注册截止日期

  • 11月30日 2022

    初稿截稿日期

  • 11月30日 2022

    终稿截稿日期

主办单位
IEEE DEIS
承办单位
Chongqing University
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