华电技术 ›› 2011, Vol. 33 ›› Issue (2): 37-37.

• 技术交流 • 上一篇    下一篇

一起发电机接地保护动作导致机组跳闸事故的分析和处理

张小兵   

  1. 广东梅县发电厂,广东梅州514089
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-02-25 发布日期:2011-02-25

Analysis and treatment on a unit tripout accident caused by tripping of generator ground protection

ZHANG Xiaobing   

  1. Guangdong Meixian Power Plant, Meizhou 514089, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-02-25 Published:2011-02-25

摘要: 通过对一起发电机出口PT一次保险异常熔断导致机组跳闸事件原因的分析,指出了PT一次保险选用、保护装置电压取样方式等方面存在的不足,提出了改进和防范措施。

关键词: 接地保护, 一次保险, 保险熔断, 发电机PT

Abstract: The reasons of a unit tripout accident caused by abnormal melt of the fuse in PT primary side in the generator outlet were analyzed. The defections in the selection of PT primary fuse and in the voltage sampling mode of the protection device were pointed out; the improvement and preventive measures were put forward.

Key words: ground protection, primary fuse, fuse melt, potential transformer (PT) of generator