本文结合郑州局西陇海线的实际情况,论述了牵引变压器过负荷跳闸的概况,分析了牵引变压器过负荷跳闸的原因:列车启动速度快,载重量增大,运行速度提高,通过对数增加,线路坡度大,并提出了牵引变压器过负荷跳闸的建议:增加牵引变压器的容量,改变供电方式,改变变电所的布局,调整过负荷整定值,加强设备检修,改造线路,均衡运输。 Based on the actual situation of Zhengzhou Longyaili Line, the paper summarizes the overloading trip of traction transformer and analyzes the reason of over-trip of traction transformer. The reason is that the train starts fast, the load increases, the running speed increases, and the logarithm increases , The line has a large slope, and put forward the suggestion of traction transformer over-load trip: increase the capacity of traction transformer, change the power supply mode, change the layout of substation, adjust the setting value of overload, strengthen the overhaul of equipment, transform the line and balance the transportation.