Dy11接线方式的配电变压器并联时高压侧相序错接的排除及其探讨

Fault analysis of Dy11 connection mode of distribution transformers parallel

广东省粤北某110kV变电站的一新投运站用变压器与该站原配电变压器低压侧并联时,发现相序接错的情况,针对此类问题经常出现在变电站的生产实际与改造过程中,详细分析了在Dy11接线方式下配电变压器低压侧并联时,高压侧相序错接的6种可能性与解决的方案[1～3]。并以该站的具体事例证实了分析结果的正确性,为工程实际现场新增变压器高压侧错误接线提供了迅速正确的改接方案,具有实际的现场工作意义。

It is found wrong when Guangdong Province northern 110kV transformer substation＇s new distribution transformer puts the parallel operation with the original distribution transformer. Against such problems frequently appear in the actual substation and the transformation of the production process, the paper detailedly analyzes of the manner in Dyl 1 wiring side parallel low-voltage distribution transformers, high-voltage sequence wrong side of the next six kinds possibilities with the solution. With actual examples of the analysis results, it also confirms the correctness of the actual project site for the new high-voltage transformer wrong side of the wiring to provide rapid access to the right programmes. It has the practical significance of the scene.