直流一点接地引起开关跳闸的分析及对策  

Analysis and countermeasure of DC one -point earth fault on switch trip

作　　者：夏传江 李鹏程 

机构地区：[1]贵州西电电力股份有限公司黔北发电厂,贵州金沙551800 [2]贵州电力试验研究院,贵州贵阳550002

出　　处：《贵州电力技术》2012年第12期56-57,共2页Guizhou Electric Power Technology

摘　　要：介绍了500kV开关的跳闸回路发生直流一点接地，开关发生无故障跳闸过程，认为直流系统的分布电容过大、操作箱跳闸回路电流保持继电器TBJ电流整定过低，直流一点接地导致开关跳闸，并制定防范直流一点接地导致保护误动、开关跳闸的措施。A 500 kV substation a switch~ trip circuit occurred DC one -point earth fauh, then the switch got trouble -free trip. This paper introduced this process and thought the main reason of switch trip when happened one - point earth fault was that the distributed capacitance of the DC system was too large, and the operation box trip circuit current keep relay （TBJ） was setting too low. The measures to prevent switch trip from one - point earth fault were drawn up.

关 键 词：直流系统 继电保护 绝缘监测 一点接地 电流保持继电器 

分 类 号：TM56[电气工程—电器]