Selection and Existing Problems of GIS Sealing Ring Materials in Alpine Environment

ZHANG Taofeng; QIN Xiaoyu; ZHANG Shuqin; LI Biao; LÜ Xunhao; GAO Yanfeng; CHEN Dong; YANG Chunyue; LÜ Jin; LÜ Min

doi:10.11973/lhjy-wl202102020

PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING > 2021 > 57(2): 80-84. > DOI: 10.11973/lhjy-wl202102020

ZHANG Taofeng, QIN Xiaoyu, ZHANG Shuqin, LI Biao, LÜ Xunhao, GAO Yanfeng, CHEN Dong, YANG Chunyue, LÜ Jin, LÜ Min. Selection and Existing Problems of GIS Sealing Ring Materials in Alpine Environment[J]. PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING, 2021, 57(2): 80-84. DOI: 10.11973/lhjy-wl202102020

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Selection and Existing Problems of GIS Sealing Ring Materials in Alpine Environment

1. Pinggao Group Co., Ltd., Pingdingshan 467001, China;
2. Linyi Power Supply Company of State Grid Shandong Electric Company, Linyi 276000, China

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Received Date: October 20, 2020

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Abstract

In order to meet the application requirements, the key factors affecting the cold resistance of gas insulated switch (GIS) equipment sealing ring were analyzed, and the sealing ring material suitable for use in alpine environment was selected. The causes of blooming and blowing of GIS equipment sealing ring in alpine environment were analyzed. The results show that the modified ethylene-propylene terpolymer could be used as sealing ring material of GIS equipment in alpine environment. The solubility of active agent and filler in the sealing ring decreases with the decrease of temperature. When it was lower than the critical value, blooming appeared on the rubber surface. When the sealing ring was assembled, the wire diameter decreased due to the stretching of the sealing ring, and the compression ratio of the sealing ring decreased at low temperature, which led to the GIS equipment blowing. The blowing problem could be solved by changing the sealing structure design.
- gas insulated switch,
- ethylene-propylene terpolymer,
- sealing ring,
- sealing performance

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