Presentation Details
Optimization Design of Grounding Sealing Structure of 220kV GIS Basin Insulator
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Updated Time：2022-08-29 11:52:47 Hits：264
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Abstract
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.
Keywords
GIS basin insulator,surface flashover,structural optimization,structural design,electric field optimization
Speaker
Lin Liu
South China University of TechnologySubmission Author
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Important Date
-
Conference Date
Sep 25
2022
toSep 29
2022
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Aug 15 2022
Early Bird Registration
-
Sep 10 2022
Contribution Submission Deadline
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Nov 10 2022
Registration deadline
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Nov 30 2022
Draft paper submission deadline
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Nov 30 2022
Final Paper Deadline
Sponsored By
IEEE DEIS
Organized By
Chongqing University
Contact Information
- Zhengyong Huang
- 61******@qq.com
Previous Conferences
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2020-09-06 China Beijing
2020 IEEE International Conference on High Voltage Engineering and Application -
2018-09-10 Greece
2018 IEEE International Conference on High Voltage Engineering and Application -
2016-09-19 China Chengdu, China
2016 IEEE International Conference on High Voltage Engineering and Application
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