110 kV主变低后备保护动作事故应急处理  

Emergency Handing of Low-Voltage Backup Protection Action Accident of 110 kV Main Transformer

作　　者：李秋思 张讥培 兰宁远 张照真 LI Qiusi;ZHANG Jipei;LAN Ningyuan;ZHANG Zhaozhen(Pingdingshan Electric Power Company,State Grid Henan Power Company,Pingdingshan 467000,China)

机构地区：[1]国网河南省电力公司平顶山供电公司,河南平顶山467000

出　　处：《电工技术》2023年第10期203-205,共3页Electric Engineering

摘　　要：介绍了一起110 kV主变低压母线单相接地导致低压进线开关烧毁的事故。通过主变低后备保护动作分析,阐述了事故发展过程和原因。结合变电站低压设备接线结构对低后备保护动作逻辑进行探讨,提出事故应急处理建议,为调度员快速恢复送电提供参考。An accident in which the low-voltage inlet switch burned out due to single-phase grounding of the low-voltage bus of the 110 kV main transformer is introduced.Through the analysis of the low-voltage backup protection action of the main transformer,the development process and causes of the accident are expounded.Combined with the wiring structure of low-voltage equipment in substation,the operation logic of low backup protection is discussed,and suggestions for emergency handling of accidents are put forward,which provides a reference for dispatchers to quickly resume power transmission.

关 键 词：低后备保护 电流互感器 事故应急处理 

分 类 号：TM63[电气工程—电力系统及自动化]