山东电力高等专科学校学报

站用交流电源系统是由站用变压器电源、站用变压器、380V低压配电屏、保护测控、交流供电网络组成的系统,目的是为了给变电站提供可靠的交流电源。变电站低配设备老旧,第一手资料缺乏,设计人员现勘困难,结果造成图纸与现场不符。综合自动化后台遥控跳合闸功能,由于开关动力电源为交流造成无法与低压备自投配合。通过低压备自投改进后,不仅解决了常规站低压备自投误动问题,更解决了备自投自动切换频繁动作问题。

Station-used alternating current power supply system consists of station transformer power source,station transformer,380 V low-voltage distribution board,protection measuring control devices as well as the alternating current power supply network with the purpose of providing reliable alternating current power supply to the transformer substation.The low-voltage distribution equipment in the transformer substation is old.The lacking of first hand information coupled with the difficulty for designers to make an on-site inspection altogether result in the unconformity between the drawing and field.Due to the alternating current switch driving power supply,the background remote control tripping and closing function of comprehensive self-transformation can't coordinate with the low-voltage spare power automatic switching.Through the improvement of low-voltage spare power automatic switching,not only its mis-operation in the regular station is resolved but also solved is the problem of much frequent automatic switchover motion.