一起套管密封件失效导致的110 kV主变本体重瓦斯动作跳闸事件分析  

Analysis of a Heavy Gas Trip Event of an 110 kV Transformer due to the Bushing Seal Failure

作　　者：潘绍明 陈梁远 张磊 赵坚 黎大健 苏毅 饶夏锦 夏小飞 李锐 PAN Shaoming;CHEN Liangyuan;ZHANG Lei;ZHAO Jian;LI Dajian;SU Yi;RAO Xiajin;XIA Xiaofei;LI Rui(Xi’an Jiaotong University,Shanxi Xi’an 710049,China;.Electric Power Research Institute of Guangxi Power Grid Co.,Ltd Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment,Guangxi Nanning 530023,China;Guangxi Power Grid CO.,LTD.,Guangxi Nanning 530023,China)

机构地区：[1]西安交通大学,陕西西安710049 [2]广西电网有限责任公司电力科学研究院,广西电力装备智能控制与运维重点实验室,广西南宁530023 [3]广西电网有限责任公司,广西南宁530023

出　　处：《广西电力》2023年第2期36-40,共5页Guangxi Electric Power

基　　金：广西博士后专项经费资助项目。

摘　　要：本文介绍和分析了一起110 kV油浸式变压器本体重瓦斯动作跳闸事件。通过分析故障录波、保护动作情况及相关试验结果,发现事故原因为高压套管顶部密封件失效,导致水分向变压器内部渗透而降低线圈匝间绝缘,最终引发饼间击穿,从而发生事故。本文针对此类事故提出了防范措施。A heavy gas trip event of an 110 kV oil-immersed transformer is introduced and analyzed in this paper.Through the analysis of the fault recording,protection action and related test results,it is found that the cause of the accident is the failure of the seal at the top of the high voltage bushing.The failure caused the infiltration of moisture into the transformer and the reduction of the coil insulation,which caused the breakdown between the coil pancakes eventually and resulted in this accident.Preventive measures against such accidents are proposed in this paper.

关 键 词：变压器 重瓦斯跳闸 套管 密封件失效 水分 

分 类 号：TM855[电气工程—高电压与绝缘技术]