110kV内桥接线备自投装置改进

Improvement of automatic backup power supply device for 110kV inner bridge connection

早期备用电源自动投入装置在应用中,当工作电源消失时,备用电源自投装置不具备动作条件造成负荷损失;当动作条件满足时,仍存在闭锁条件造成其不能正确动作。结合110 kV内桥接线变电站实际运行方式,找出造成失电的各种原因及对应表现,通过现场多次试验,发现进线开关、桥开关备自投拒动原因及存在动作死区的原因,对不同运行方式下装置的充电、闭锁条件及动作逻辑进行了改进。结果表明改进后装置运行良好。

In early stage, when the power supply disappears for some reason, the automatic backup power supply device does not have operating conditions and caused load losses. Even when the operating conditions are met, there is still block condition that caused malfunction. Based on the actual operation mode of inner bridge connection in 110 kV substation, multiple field tests were performed to inspect reasons of power loss and corresponding phenomena. The reasons of malfunction and dead zone of incoming line and bridge switching is discussed. The improvements in device charging, block conditions and operating logic in different operation modes is proposed and implemented to provide reference for routine maintenance and future application.