V/V型变压器低压侧故障引起110kV牵引线路误动的原因分析及解决措施

Cause Analysis and Treatment Measures of 110kV Traction Line Misoperation Caused by Low Voltage Side Fault of V/V Transformer

介绍了青藏铁路公司电铁牵引接线方式及V/V型变压器故障时的特殊特性,并结合某变电站实例对V/V型变压器低压侧故障时引起上级电铁牵引线路距离II段保护越级动作进行了分析,针对长线路电铁牵引线保护整定及存在的问题提出了相应的改进措施。

The special characteristics of the electrified railway traction connection mode and the fault of V/V transformer in Qinghai Tibet Railway Company were introduced.Combined with the actual situation of a transformer substation,the protective overstep action of the distance II section of the high level traction line caused by lower voltage side fault of V/V transformer was analyzed.The corresponding improvement measures were proposed for the protection and setting of the long line electric railway traction line.