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

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.