110kV变电站备自投动作不成功原因分析及补救措施

Analysis and remedial measures of the unsuccessful causes of the automatic backup power in 110 kV transformer substation

由于供电可靠性的需要,110kV变电站要求采用双电源供电,一回作为主供,另一回热备用。当主供线路故障跳闸时,备自投装置动作将备用线路自动投入,从而保证不间断对用户供电。然而当线路故障时,却极易引起主变跳闸,造成备自投失败,就此问题进行分析供各位同行参考。

For the needs of the reliability of the power supply, 110 kV transformer substation requests the adoption of dual-power supply,one as a main power supply,the other as a preparation.When the power supply trips,the automatic backup power devices will put into use.Thus,it can guarantee the power to the users continuously. But when the line is out of order,it can easily make the main power trip,which causes the failure of automatic backup power.This article analyses this issue,which is a reference to the companions.