线路故障重合时对变压器差动保护的影响分析

Influence of line fault reclosing on transformer differential protection

乌江渡发电厂#0变压器发生近区故障,故障切除后线路保护再次重合到故障点,对变压器差动保护动作的原因进行了分析,得出了在特定合闸时刻,变压器差动保护在近区故障时存在动作的可能性的结论,提出了相应的解决措施。

The short-line fault was occurred in transformer No.0 of Wujiangdu Power Plant.After the fault was cleared,the line protection was reclosed into the fault point.The reason,which caused the transformer differential protection to act,was analyzed.The analysis shows that in certain reclose time,when the short-line fault occurred,the transformer differential protection could act in certain probability.The relevant solving measures were put forward.