牵引变电所馈线故障导致越区跳闸事件分析

Analysis of fault caused by feeder fault in traction substation

对牵引变电所因馈线保护装置保护拒动导致主变压器后备保护越级跳闸事件进行短路计算理论分析并与保护装置给出的保护动作数据进行对比,得出馈线速断、过电流、过流增量、阻抗保护均不动作的原因,再结合相应保护装置的特性提出解决办法,并根据最新技术提出加装电力机车过分相自动断电装置方案。

The traction substation feeder protection device for refuse to result in the main transformer backup protection over- ride trip event of the comprehensive analysis, and gives the feeder quick break, over current and over current increment, imped- ance protection are no action causes and solutions.