摘要
文章叙述了飞来峡电厂1#主变低压侧A相弧光接地的故障现象和处理过程;通过异常报警信息发现了1#机组定子接地保护误报警和2#机组定子接地保护误动作两个问题,详细分析了其原因是定子保护参数设置不恰当,并对4台机组的定子保护参数进行试验检查分析,提出了经多方认可的整改措施,以期为水力发电机组定子接地保护参数选择配置提供参考。
This paper describes the fault phenomenon and processing of A-phase arc grounding on the low-voltage side of 1#main transformer of Feilaixia plant.Through abnormal alarm information,two problems are found:false alarm of stator grounding protection of 1#unit and false operation of stator grounding protection of 2#unit.It is analyzed in detail because of inapproriate setting of stator protection parameters.The stator protection parameters of four units are tested and analyzed,and the corrective measures recognized by many parties are put forward.In order to provide reference for the selection and configuration of stator grounding protection parameters of hydraulic generating sets.
作者
肖南文
XIAO Nanwen(Feilaixia Hydropower Plant,Qinyuan 511825,China)
出处
《广东水利水电》
2023年第1期98-102,共5页
Guangdong Water Resources and Hydropower
关键词
飞来峡水电厂
定子接地
弧光接地
Feilaixia hydropower plant
stator grounding
arc grounding
