摘要
直流系统正常对于变电站安全稳定运行意义重大。通过实际案例,介绍了两段直流正负极串电的现象,并对建立等效电路模型进行分析,利用电路的基本原理对等效电路模型进行化简,说明了两段直流正负极串电导致两段母线同时接地报警的原因,分析了两段母线串电带来的危害,同时提出了查找串电点的有效方法。
The normal operation of DC system is of great significance to the safety and stability of substation.Through actual cases,the phenomenon of two set of DC busbars of which cathode and anode are mixed to connect is introduced.And the equivalent circuit model is built and analyzed,which is simplified by the basic circuit principle.The reasons for grounding alarm caused by two sets of DC busbars of which cathode and anode are mixed to connect are illustrated.In addition,the damage of two sets of DC busbars of which cathode and anode are mixed is also analyzed,and effective methods to search the electric mixed point are also proposed.
出处
《江苏电机工程》
2011年第3期38-40,共3页
Jiangsu Electrical Engineering
关键词
直流接地
直流串电
分布电容
小信号注入
direct current grounded
direct current collude
distributed capacitance
small signal
