一起主变被迫停运事故的分析与对策

Analysis and countermeasure of an accident of the main transformer forced outage

针对由于一起变压器套管CT二次侧短路造成变压器被迫停运事故,指出目前对变压器套管CT升流试验普遍存在误区和盲点,导致变压器投运前不能真正全面的检查套管CT的二次回路,给变压器安全运行造成隐患。针对此类缺陷,提出了一种新的主变套管CT试验方法。

With the forced outage accident of the transformer caused by the secondary side short circuit of the transformer bushing CT, this paper points out that the up-flow test to the transformer bushing CT at present commonly has the errors and blind spots. And it will result in that the secondary circuit of the bushing CT can not be examined really and comprehensively before the transformer puts into operation, which can cause the hidden trouble to the safety operation of the transformer. Aiming at such defects, a new test method to the main transformer bushing CT is presented.