华电技术 ›› 2009, Vol. 31 ›› Issue (10): 64-67.

• 技术交流 • 上一篇    下一篇

启动/备用变压器差动保护误动原因分析

黄海波   

  1. 湖南华电长沙发电有限公司,湖南长沙 410203
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-10-25

Analysis on the reason of the differential protection malfunction of the start & standby auxiliary transformer

HUANG Haibo   

  1. Hunan Huadian Changsha Power Generation Corporation Limited, Changsha 410203, China
  • Received:1900-01-01 Revised:1900-01-01 Published:2009-10-25

摘要: 针对湖南华电长沙发电有限公司启动/备用变压器所带负荷接地故障而引起启动/备用变压器差动保护误动事故,根据故障录波图、保护动作报文和故障现场的实际情况,分析了故障发展过程和继电保护动作行为,通过试验对故障点进行了查找,发现了误动的原因,提出了具体的防范措施。

关键词: 接地故障, 启动/备用变压器差动保护, 保护误动, 差动保护, 防范措施

Abstract: Aiming at a malfunction accident of differential protection of start & standby auxiliary transformer caused by the load grounding fault in Hunan Huadian Changsha Power Generation Corporation Limited, according to the fault record diagram, the protection action report and the practical condition of the accident field, the accident developing procedure and the behavior of the relay protection were analyzed. The fault point was found by experiment. The reason of the malfunction was discovered. And some concrete preventive measures were proposed.

Key words: grounding accident, differential protection of start &, stand-by auxiliary transformer, protection malfunction, differential protection, preventive measure