一起110kV进线跳闸事故分析与启示  

Analysis and Revelation from Trip of a 110kV Incoming Protection

作　　者：陆晓彤[1] 滑祥[1] 成善武[1] 

机构地区：[1]宝钢工程技术集团有限公司,上海201999

出　　处：《电气技术》2013年第11期88-89,92,共3页Electrical Engineering

摘　　要：针对一起变电所110kV进线跳闸事故,结合事故处理经过、保护动作情况,对动作原因进行分析,付母线GPT的二次接线问题是造成跳闸事故的原因。介绍了负载不平衡时三相四线制系统中中性点电压偏移的概念和公式,提出此次事故的相关启示。This paper carefully analyzes the cause of protected trip through a obstacle of a l 10kV incoming system, according to accident processing and action on the protection, and found wrong secondary wiring of B bus GPT are the cause of the accident. When three - phase and four - wire system has asymmetrical load, the concept and formula about the deviation of voltage at neutral point are given, the revelation from the accident are put forward.

关 键 词：中性点偏移 接地过电压 GPT 

分 类 号：TM73[电气工程—电力系统及自动化]