摘要
根据LFP-965型备用电源自动投入装置的工作原理,分析了在一些电气主接线方式为内桥型接线的变电站中,当母线电压互感器(PT)与线路PT共用时,由于LFP965型备用电源自动投入装置不能判别两段母线是否同时失压,从而限制了其使用范围。文中提出了通过修改软件或增加外部切换回路两种解决方案,认为通过软件实现应为最佳解决方案。
According to the principle of backup power switchover unit of LFP-965, LFP-965 unit can not distinguish two buses without voltage synchronously when public busbar voltage transformer and line voltage transformer are employed at the same time. It limits the application scope of LFP-965 unit.This paper analyses the actual problems and puts forward two resolving schemes, that revises software and adds external switchover circuit. And software revising is a superior one.
出处
《继电器》
CSCD
北大核心
2005年第11期77-79,共3页
Relay
关键词
备用电源自投装置
母线电压
线路电压
backup power switchover unit
busbar voltage
line voltage transformer
