摘要
分析了直流短路、直流接地、寄生回路、断路器动作异常等故障现象对变电站站用直流系统的影响。分析了熔断器、直流断路器在站用直流系统保护中的不足,提出了采用定时限级差保护的解决方法。最后介绍了DP90系列智能型直流系统保护装置。
The influence of the faults such as DC short circuit, grounding, parasitic circuit, circuit breaker abnormal operation on substation DC system was analyzed, and the insufficiency of fuse, DC breaker in real substa- tion DC system protection was analyzed. The method to use the definite differential protection solution was pro- posed, and DP90 series of intelligent type DC system protection device was introduced.
出处
《低压电器》
2012年第3期9-12,共4页
Low Voltage Apparatus
关键词
直流系统
级差保护
接地监测
寄生回路
动作异常
DC system differential protection grounding monitoring parasitic loops abnormal action
