一次主变送电的异常跳闸分析

500 kV辽阳变电站2号主变压器在送电过程中发生两次充电保护动作跳闸，通过对保护动作情况、故障录波装置的分析及当时系统负荷的调查，用试验仪重新模拟故障对充电保护进行试验，通过反复试验和大量计算，并对事故过程、检验条件、试验方法及试验结果综合分析，发现充电保护之所以动作是由于主变二次侧合环时系统电流中含有大量直流分量造成的。

Causes analysis about the main transformer breaker tripping

The charge protection operation of the 2# main transformer of Liaoyang 500 kV substation happened two times during the electricity transmission.Through analysing and investigating the circumstances of protection operation, the stoppage record electricwave insallation and the system of electric charge at that moment. We tried to imitate the effection,which the stoppage brings to the charge protection by using the experiment equipment again. By testing repeatly, caculating a vast amount of data and analysing ...