华电技术 ›› 2012, Vol. 34 ›› Issue (9): 65-66.

• 技术交流 • 上一篇    下一篇

某500kV主变压器失灵保护拒动原因分析

王天民,张小刚 ,高波   

  1. 安阳供电公司,河南安阳455000
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-09-25 发布日期:2012-09-25

Analysis on reason causing the 500kV main transformer breaker failure protection to refuse to trip

WANG Tianmin, ZHANG Xiaogang, GAO Bo   

  1. Anyang Power Supply Company, Anyang 455000, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-09-25 Published:2012-09-25

摘要: 某500kV变电站在调试传动过程中,发现500kV主变压器高压侧断路器失灵保护动作后联跳、主变压器三侧功能不能实现。对该回路故障进行了分析,指出图纸设计错误是造成主变压器失灵保护拒动的主要原因,提出了解决方案,从而有效避免了某500kV主变电站失灵保护的拒动和误动。

关键词: 变电站, 主变压器, 断路器失灵, 拒动, 误动

Abstract: It was found that after the 500kV main transformer breaker failure protection acted, the function of intertrip of the switches in three sides of the main transformer can not be realized in the transmission debug process of a 500kV substation. The fault in this circuit was analyzed, and it was pointed out that the main reason of this fault is the design error which result the malfunction of the 500kV main transformer breaker failure protection to refuse to trip . A solution was proposed to avoid effectively refusing to trip and tripping improperly.

Key words: substation, main transformer, circuit breaker failure, refuse to trip, improper tripping