站用变低压侧核相异常分析及处理  

Analysis and Treatment of Phase Check Anomaly at Low-voltage Side of Station Transformer

作　　者：王悦 董超群 WANG Yue;DONG Chaoqun(State Grid Henan DC Center,Zhengzhou 450048,China;State Grid Henan Extra High Voltage Company,Zhengzhou 450048,China)

机构地区：[1]国网河南省电力公司直流中心,河南郑州450048 [2]国网河南省电力公司超高压公司,河南郑州450048

出　　处：《电工技术》2023年第19期95-97,共3页Electric Engineering

摘　　要：在某一10 kV站用变外进电缆更换后,在低压侧进行核相工作时发现低压侧相序角度与母线不一致,这类问题经常发生在变压器的新建及变压器进线改造过程中。为此,分析站用变常用的Dyn11接线组别的变压器外进高压侧相序接错后的核相结果,提出处理措施。The mismatch of phase sequence angle between low-voltage side and busbar was observed during the phase check after changing the external cables of a certain 10 kV station transformer.This kind of problem often occurs in the process of transformer construction or transmission lines reformation.This paper analyzes in detail the phase check results and corresponding treatment with respect to phase sequence incorrectness of external high-voltage side of the commonly used Dyn11 transformer.

关 键 词：站用变 相序接错 核相 

分 类 号：TM407[电气工程—电器]