220kV母线母差保护装置强制隔刀互联告警原因分析与处理  

Cause Analysis of Forcing Isolator Interconnected Warning in 220 kV Bus Differential Protection and Its Treatment

作　　者：刘瑞 段钧 

机构地区：[1]内蒙古超高压供电局,内蒙古呼和浩特010080

出　　处：《内蒙古电力技术》2013年第4期112-114,共3页Inner Mongolia Electric Power

摘　　要：某500 kV变电站220 kV母线SG B750母差保护装置正常运行时频繁闪报"强制隔刀互联",装置面板上的"互联状态"、"告警"灯亮,对母线保护SG B750强制隔刀互联缺陷现场进行母联电流测量和母联电流极性检查,SG B750母差保护母联电流极性接入正确;对母联间隔进行停电检查,最终确定,母线保护母联间隔电流回路两点接地是引起保护装置故障的主要原因。结合电网反事故措施,提出保护小室至开关场敷设等电位铜排、加强基建施工过程质量监督及验收等建议。The forcing isolator interconnected warning in SG B750 of 220kV bus protection in some 500 kV substation appeared frequently as normal operation. Through on-site bus coupling current measurement and current polarity detection, determine the main causes of the failure was origined from two ground points. With anti-accident measures of power grid, the paper presented to protect the potential copper platoon, strengthen infrastructure construction process of quality supervision and its acceptance.

关 键 词：220KV母线 母差保护装置 强制隔刀互联 二次回路 电位差 

分 类 号：TM645.1[电气工程—电力系统及自动化]