摘要
介绍某电厂机组并网初期,发电机定子接地保护动作跳机事件及检查经过。指出保护动作是由于发电机分支回路--高厂变离相封闭母线内盆式绝缘子受潮放电引起的。分析了高厂变封闭母线内盆式绝缘子管理中存在的薄弱环节,提出了绝缘子防潮管理措施,以杜绝类似事件发生。
This paper introduces the trip event and inspection process of generator stator ground protection action at the initial stage of grid synchronization of a power plant unit. It is pointed out that the protection action is caused by the damp-induced discharge of the basin insulator in the isolated phase enclosed busbar of the high voltage station transformer, which is the branch circuit of the generator. It analyzes the weak aspects in the management of the basin type insulator in the enclosed busbar of high voltage station transformer, and puts forward the management measures for insulator moisture-proof to prevent similar incidents.
作者
张林渠
张时宁
叶绍锋
ZHANG Linqu;ZHANG Shining;YE Shaofeng(Sichuan Guang’an Power Plant Co.,Ltd.,Guang’an 638017)
出处
《电力安全技术》
2020年第2期31-33,共3页
Electric Safety Technology
关键词
高厂变
离相封闭母线
盆式绝缘子
受潮
high voltage transformer
lsolated phase enclosed bus
basin type insulator
damp
