• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2011, Vol. 32 ›› Issue (8): 78-80.

• 发电技术 • 上一篇    下一篇

220 kV线路接地故障引起发变组高压侧断路器误跳闸原因分析及处理

孟庆党,雷春明,李博,戴文华,孙效云   

  1. 1. 华能巢湖发电有限责任公司
    2.
  • 收稿日期:2011-04-22 出版日期:2011-08-01 发布日期:2012-02-23
  • 通讯作者: 孟庆党 E-mail:julia207209@126.com

Analysis and Solution for Mistrip Induced by 220 kV Line-to-ground Fault of High-voltage Side Circuit Breaker in Generator-transformer Unit

  • Received:2011-04-22 Online:2011-08-01 Published:2012-02-23

摘要:

从华能巢湖电厂220 kV 线路接地故障引起发变组高压侧断路器误跳闸现象入手,通过建立模型,分析探讨该事故发生的原因,为解决高频分量通过二次电缆分布电容侵入跳闸回路引起的断路器误跳闸问题提供一些对策。

关键词: 发变组, 接地故障, 耦合电容, 高频暂态分量, 跳闸, 降低压降

Abstract:

The mistrip of high-voltage side circuit breaker of generator-transformer unit occurs and is induced by 220 kV line-to-ground fault in Huaneng Power Plant of Chaohu. In the paper, the causes of the accident are analyzed by constructing models, that the high frequency components invade into the trip circuit by the distributed capacitance of secondary cable, providing references for similar malfunction.