3/2断路器接线TA死区问题站域方案解析  

Station Space Analysis on TA Dead Zone Problem of 3/2 Circuit Breaker Wiring

作　　者：李智 韩冬 王涛 

机构地区：[1]国网安徽省检修公司芜湖分部,安徽芜湖241000 [2]国网技术学院,山东济南250002

出　　处：《国网技术学院学报》2017年第4期15-19,共5页Journal of State Grid Technology College

摘　　要：通常将快速主保护动作无法完全隔离的一次设备区域称为保护死区。保护死区形成的根本原因是TA配置不足,造成主保护范围不能完全交叉。3/2断路器接线TA回路方面,1个完整串采用3组TA、4组TA、6组TA(灌式T,GCB、GIS)的配置方式,线路保护的交流电流回路均采用和电流接线方式。完整串内采用4组TA、6组TA的配置方式在保护配置方面只有重叠区、没有死区。1个完整串采用3组TA配置的有2个死区。现行保护死区问题是采用断路器失灵保护方案解决的。隔离故障时间长,对系统稳定运行不利。The primary equipment area which the fast main protection action can not completely be isolated is called the protection dead zone.The basic cause for protection dead zone is that the TA configuration is insufficient,so the main protection range cannot be completely intersected.In wiring circuit of 3/2 curcuit breaker,one complete string adopts configuration modes such as 3 sets of TA,4 sets of TA,6 sets of TA （tank T,GCB,GIS） and the AC current loop of line protection adopts wiring toothed of sum current.There is no overlap zone or dead zone in a complete string which adopts 4 sets of TA or 6 sets of TA,while there are two dead zones in a complete string which adopts 3 sets of TA configurations.The current protection dead zone problem is solved by using the breaker failure protection scheme,in which the isolation fault time is long and is unfavorable to the stable operation of the system.

关 键 词：500 k V 变电站 3 / 2 断路器接线方式 死区保护 失灵保护 

分 类 号：TM452[电气工程—电器]