一起35kV变压器中性点避雷器故障分析  

Failure analysis of the neutral point arrester of the 35kV transformer

作　　者：张雄清 万方培 杨珊 林毅 Zhang Xiongqing;Wan Fangpei;Yang Shan;Lin Yi(Zhoushan Power Supply Company, Zhoushan, Zhejiang 316000)

机构地区：[1]国网舟山供电公司,浙江舟山316000

出　　处：《电气技术》2019年第3期115-117,121,共4页Electrical Engineering

基　　金：国家电网公司科技群创项目35kV及以下开关分合闸线圈电阻自动测试仪的研制(5211ZS180014)

摘　　要：本文主要介绍不接地系统变压器中性点可能出现的各种过电压,通过安装中性点避雷器保护设备免受破坏。避雷器选型正确与否,直接关系到系统正常运行。通过一起线路接地故障造成主变中性点避雷器击穿原因分析,查找避雷器故障部位,提出变压器中性点避雷器选型原则和检修过程注意事项。Various neutral point overvoltage which may occur in the isolated neutral system transformer were presented in this paper, and the installation of neutral point arrester can keep the device from destroying. Whether the arrester is selected correctly or not is directly related to the normal system operation. The selection principle of the transformer neutral point arrester and the precautions of the maintenance process were proposed through the analysis of the breakdown of the transformer neutral point arrester caused by the line grounding fault and the finding of the fault location.

关 键 词：避雷器 变压器 单相接地 

分 类 号：TM862[电气工程—高电压与绝缘技术]