兴安直流输电工程继电器绝缘失效机理及整治措施  

Relay Insulation Failure Mechanism of Xing’an HVDC Project and Regulation Measures

作　　者：王振 杨育丰 刘坤 国建宝 鞠伟 王有亮 吴健颖 WANG Zhen;YANG Yufeng;LIU Kun;GUO Jianbao;JU Wei;WANG Youliang;WU Jianying(China Southern Power Grid EHV Maintenance&Test Center,Guangzhou,Guangdong 510663,China;China Electronic Product Reliability and Environmental Testing Research Institute,Guangzhou,Guangdong 510610,China)

机构地区：[1]中国南方电网有限责任公司超高压输电公司检修试验中心,广东广州510663 [2]中国赛宝实验室,广东广州510610

出　　处：《广东电力》2019年第8期126-132,共7页Guangdong Electric Power

基　　金：中国南方电网有限责任公司科技项目(CGYKJXM20180129)

摘　　要：针对兴安直流输电工程频繁出现的某型号继电器绝缘失效导致交流滤波器跳闸事件,分析该型号继电器失效机理。首先,对继电器进行解剖,指出该型号继电器存在结构设计缺陷;然后,通过实验检测出继电器塑料表面油质液体具有导电性,分析该导电液体的物质成分,推断导电液体的来源为塑料中的助剂;最后,分析继电器失效过程,并提出相应的反事故措施。实际运行结果表明,所提出的措施能有效解决因继电器失效导致的交流滤波器跳闸问题。Aiming at frequent tripping of the AC filter in Xing an HVDC project caused due to relay insulation failure,this paper analyzes failure mechanism of the relay.By dissecting the relay,it firstly points out there are defects in structure design of this typed relay.Then conductivity of oil like liquid on the plastic surface of the relay is detected by experiment,and the paper analyzes material composition in the conductive liquid and concludes the source is additives in the plastic.Finally,it analyzes failure process of the relay and proposes relevant anti-accident measures.Actual operation results indicate the proposed measures can effectively solve the problem of tripping of the AC filter caused by relay insulation failure.

关 键 词：继电器 直流工程 失效机理 油质导电液体 塑料助剂 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM58