摘要
针对新建工程项目或技术改进项目经常发生电气设备投运后才发现电流互感器回路极性错误的问题,影响继电保护及电能计量功能的正确性。结合电气设备所涉及的发电机或电动机差动保护回路、变压器差动保护回路、线路保护、母线差动保护、电能计量回路等电流回路极性问题,总结提出在设备投运前现场正确判定电流回路极性的确认方法,避免这些电气设备在投运带负荷测试后才能发现电流回路的极性错误问题。这些分析判定方法可为现场电气设备二次回路的调试、维护工作提供参考借鉴。
The problem of incorrect polarity in current transformer loop frequently occurs when electrical equipment put into operation in new project or technical transformation project,which affects relay protection and power measurement.This paper discusses on the polarity problem of current loop in grid system equipment such as differential protection current loop for generator or motor,transformer differential protection current loop,line protection current loop,bus differential protection current loop and electric energy measurement current loop.Methods for correctly confirming the polarity of current loop were put forward and summarized,to avoid polarity error in current loop occurring after the load test of the electrical equipment.It provides some reference for commissioning and maintenance of secondary circuits in electrical equipment.
作者
高大全
唐大洪
李波
GAO Daquan;TANG Dahong;LI Bo(The Vanadium & Titanium Resources Co.,Ltd.of Pangang Group,Panzhihua,Sichuan 617012,China)
出处
《冶金动力》
2019年第9期24-28,共5页
Metallurgical Power
关键词
电流回路极性
CT极性
保护回路
极性判别方法
current loop polarity
CT polarity
protection loop
polarity determinationmethod
