高寒地区高压断路器用SF_(6)/CF_(4)混合气体液化试验分析  

Analysis of Liquefaction Test of SF_(6)/CF_(4) Gas Mixture Used in High Voltage Circuit Breaker in Severe Cold Region

作　　者：杨文良[1,2] 刘卓 王振中 王琰 赵磊 YANG Wenliang;LIU Zhuo;WANG Zhenzhong;WANG Yan;ZHAO Lei(Inner Mongolia Power Research Institute,Hohhot 010020,China;Inner Mongolia Enterprise Key Laboratory of High Voltage and Insulation Technology,Hohhot 010020,China)

机构地区：[1]内蒙古电力科学研究院,呼和浩特010020 [2]内蒙古自治区高电压与绝缘技术企业重点实验室,呼和浩特010020

出　　处：《内蒙古电力技术》2021年第3期28-31,共4页Inner Mongolia Electric Power

基　　金：内蒙古电力(集团)有限责任公司科技项目“特殊环境下的SF6运行特性的研究”(2019-98)。

摘　　要：内蒙古锡林郭勒地区某次气温骤降后,8台不同生产厂家的SF_(6)/CF_(4)混合气体断路器相继发生低气压告警或闭锁故障,现场开展了密封性能测试、SF_(6)分解物测试、密度表校验等诊断性试验,试验结果未见异常。之后对缺陷断路器进行了混合气体组分测试,根据断路器参数,利用试验平台模拟了断路器在低温运行工况下发生低气压故障的过程。结果表明:充装SF_(6)/CF_(4)气体比例不正确、混合气体密度表参数不匹配、罐体内气压过高会造成SF_(6)/CF_(4)混合气体断路器在低温条件下发生低气压故障。提出了应在相关规程中增加对混合气体断路器开展现场混合气体组分测试、核对密度表参数、出厂时进行低温条件下密封性能检测等建议。After the sudden temperature decreasing in Xilin Gol,the defects of low-pressure alarm or blocking for eight SF_(6)/CF_(4) gas mixture insulation circuit breakers of various manufacturers occurred.The diagnostic tests are conducted onsite for the defective circuit breaker,for instance,leakproofness test,SF_(6) decomposition test,and density meter verification.Nevertheless,the test results indicate no abnormalities.In order to research the reasons of the defects,mixed gas composition test for defective circuit breaker is conducted in this paper.Simultaneously,the parameters of the mixed gas circuit breaker in Xilin Gol are arranged.The process of low-pressure defects for SF_(6)/CF_(4) gas mixture circuit breaker under low temperature operating condition is simulated combining the test platform.The simulation test illustrated that incorrect filling ratio of SF_(6) and CF_(4),mismatch of the parameters of the gas mixture density meter,and excessive pressure in tank may lead to low-pressure defects for SF_(6)/CF_(4) gas mixture circuit breaker under low temperature operating condition.Thus,a number of technical suggestions are proposed in this paper.The requirements of onsite mixed gas composition test and the onsite collation of gas mixture density meter parameters should be supplemented to the relevant regulations.Additionally,leakproofness test under low temperature operating condition should be implemented for release test.

关 键 词：高寒地区 SF_(6)/CF_(4)混合气体断路器 低气压 气体组分 密度表参数 

分 类 号：TM561[电气工程—电器]