变压器铁心多点接地故障处理

Treatment of the transformer iron-core multipoint grounding fault

介绍了一起变压器铁心多点接地故障,采用三比值法确定了铁心多点接地故障,针对该类型的故障,在变压器不能立即退出运行的情况下,采取了加装限流电阻的处理方法,不但抑制了接地故障的发展,而且避免了一次发电机的非计划停机事故。

A fault of transformer iron-core multipoint grounding was introduced.The fault was be confirmed by three ratios method.Due to that the transformer can not outage,the treatment method of adding current-limiting resistor was adopted.Then,not only the growth of the grounding fault was be inhibited,but also a non-planned shutdown accident was be avoided.