南汇站站用电二次回路改造方案研究

Research of power use system secondary circuit transformation plan of Nanhui power station

站用电是变电站的重要组成部分,其自切和自投装置是全站交直流系统用电的重要安全保障,对于整个电力系统的安全可靠运行具有重要的意义。文章以220 kV南汇变电站某出线故障而造成母线电压波动,从而引起站用电跳闸,站用电自切不成功引发线路合闸不成功的事例出发,对站用电失电的原因进行分析,提出站用电系统的改造方案,消除了事故的根源,保证了该变电站的安全稳定运行。

Station power system is an important part of the transformer substation. The automatic switching and backup devices provide a safe guarantee for power consumption of the substation, it is also important to the safe and reliable power supply in electric power systems. The reason of losing load of station power is analyzed, by the unsuccessful of automatic switching of station power, which is caused by the fault of one lines of 220 kV substation. The transformation project is practiced, trouble is eliminated and the safety of 220 kV substation stability operation is ensured.