海外常用双继电器直流电源切换回路可靠性分析

Reliability Analysis of DC Power Switching Circuit of Double Relays Used Overseas

可靠的辅助电源是保证电力二次装置正常运行的重要保证,现阶段大多数变电站均采用直流电源作为保护和控制电源。介绍了海外常用的一种双继电器直流电源切换回路,对切换原理进行了详细阐述,并结合工程实际对该切换回路进行了可靠性分析,同时提出了改进方案,有效提升了该直流电源切换回路的适应性。

Reliable auxiliary power supply is an important guarantee for the normal operation of power secondary devices.At this stage,most substations use DC power supplies as protection and control power supplies.Introduced a dual-relay DC power supply switching circuit commonly used overseas,explained the switching principle in detail,and carried out a reliability analysis of the switching circuit in combination with actual engineering,and proposed an improvement plan,which effectively improved the DC power switching circuit adaptability.