绝缘子受潮导致机组跳闸的分析及预防  

Analysis and Prevention of Unit Trip Caused by Insulator Damp

作　　者：张林渠 张时宁 叶绍锋[1] ZHANG Linqu;ZHANG Shining;YE Shaofeng(Sichuan Guang’an Power Plant Co.,Ltd.,Guang’an 638017)

机构地区：[1]四川广安发电有限责任公司,四川广安638017

出　　处：《电力安全技术》2020年第2期31-33,共3页Electric Safety Technology

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.

关 键 词：高厂变 离相封闭母线 盆式绝缘子 受潮 

分 类 号：TM216[一般工业技术—材料科学与工程]