1#冷床整流变压器差动保护跳闸故障分析

Failure Analysis of Differential Protection for the 1# Cooling Bed Rectifier Transformer

秦皇岛首秦公司轧钢部1#冷床区域的辊道变频设备由一台整流变压器供电,运行初期的一年频繁报差动故障,也曾经因变压器差动保护动作造成多次高压开关柜保护跳闸,针对设备进行了详细的检查后发现了一些关于高压综保整定值计算错误,设备施工接线错误等导致故障频繁发生,经过详细的分析,有助于大家对整流变压器的高压系统进一步的了解。

Qinhuangdao Shouqin Metal Materials Co.Ltd heavy palte rolling Department, the 1# cooling bed roller table motors power are supllyed by an rectifier transformer. During Early time after final commising,some failures/alarms carried out sometimes during that time,and sometimes the High-voltage cabinet switched off.We detailed examination the fault,finally,we found out the parameters for the high-voltage cabinet is wrong,and the CT wires Connection wrong Caused by failure.Through this matter,we can further understanding of the high-voltage transformer rectifier system.