摘要
结合设备实际运行中由于值班人员误操作引起跳闸回路发生一点接地导致开关跳闸的案例进行分析,剖析分布电容对直流系统的影响,导致跳闸回路发生负极一点接地时引起操作箱TBJ继电器动作开关跳闸,进而提出了一些防范措施,以避免类似事故的发生。
Based on the analysis of a switch trip accident caused by one point grounding of the trip circuit due to operator’s misoperation in actual equipment operation,the paper analyzes the effect of distributed capacitance on the DC system,which causes the TBJ relay in the operation box to trip when one point grounding of the negative pole occurs in the trip circuit.Some preventive measures are also put forward to avoid similar accidents.
作者
刘智成
LIU Zhicheng(The Energy Center of Jiuquan Iron and Steel Group,Jiayuguan,Gansu 735100,China)
出处
《冶金动力》
2020年第3期11-13,16,共4页
Metallurgical Power
关键词
一点接地
误跳
TBJ启动电流
直流系统
one point grounding
faulty trip
TBJ starting current
DC system
