220kV变电站主变有载分接开关重瓦斯继电器跳闸故障原因分析

Fault Analysis on On-load Tap Switch Heavy Gas Relay Tripping for 220 kV Main Transformer

针对近期一起典型东北电力系统发生的变电站主变有载分接开关重瓦斯跳闸故障进行分析,提出呼吸器受潮冷冻后回温重新呼吸及变压器内油温上升造成油流涌动是引起该类故障的原因,并进行了相应的模拟试验。

According to heavy gas relay tripping fault of on- load tap switch for main transformer of northeast electric system,its fault causes are analyzed. This paper proposes that breather can reuse after frozen when it becomes damp,the cause of failure is that oil surging caused by oil temperature rise in the transformer,simulation test is carried out.