一起较为特殊的主变及线路保护动作原因分析

The analysis of reason to one special protection action in main transformer and line

针对一起变电站的110kV主变保护和35kV线路保护相继动作跳闸事件展开了分析，通过事故调查发现其存在2个实际故障点，分别位于110kV主变保护动作区，l,XTL35kV线路保护动作区。在分析这种较为复杂的故障时，思路要清晰，不要互相影响。

Through analyzing the tripping action of the ll0kV transformer and 35kV line in one substation, 2 actual fault points have been found which locate in the 110kV main transformer protection action zone and 35kV line protection action zone. In analyzing the complex failure, the train of thought must be clarity lead to not influence each other.