一种CT二次回路安全短接测试线的研制  

Development of a Safety Short Connected Test Line for CT Secondary Circuit

作　　者：杨洪涛[1] 杨长存 周玉秀[1] YANG Hongtao;YANG Changcun;ZHOU Yuxiu(Fengtai Power Generation Branch of Huaizhe Coal Power Co.,Ltd.,Huainan 232131)

机构地区：[1]淮浙煤电有限责任公司凤台发电分公司,安徽淮南232131

出　　处：《电力安全技术》2020年第3期68-71,共4页Electric Safety Technology

摘　　要：在日常消缺、检修、异动、技改时,经常需要短接(或跨接)运行中CT的二次回路端子,如果发生误短接其他运行中的CT二次回路,就可能造成保护误动、开关误跳、机组停机等严重事故。为了避免此种现象的发生,提出研制一种CT二次回路安全短接测试线,采用并联电阻分流原理判断被短接CT二次回路正确性,给操作者提供容错机会,避免电力事故的发生。In the routine defect elimination,maintenance,operation switching and technical modi fication,it is necessary to short connect(or bridge connect)the CT secondary circuit terminal during operation.If misconnection occurs in other CT secondary circuits in operation,it may cause serious accidents such as protection false operation,switch malfunction,unit shutdown,etc.In order to avoid the occurrence of this phenomenon,a safety short connected test line of CT secondary circuit is developed,which uses the shunt principle with electric resistors in parallel to determine the correctness of the CT secondary circuit to be shorted.It provides the operator with a fault-tolerance opportunity to avoid the occurrence of power accidents.

关 键 词：误短接 保护误动 CT二次回路 测试线 

分 类 号：TM451[电气工程—电器]