华电技术 ›› 2009, Vol. 31 ›› Issue (11): 56-57.

• 技术交流 • 上一篇    下一篇

变压器铁心多点接地故障处理

马英杰   

  1. 华能宁夏大坝发电有限责任公司,宁夏青铜峡 751607
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-11-25 发布日期:2009-11-25

Treatment of the transformer ironcore multipoint grounding fault

MA Yingjie   

  1. Huaneng Ningxia Daba Power Generation Corporation Limited, Qingtongxia 751607, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-11-25 Published:2009-11-25

摘要: 介绍了一起变压器铁心多点接地故障,采用三比值法确定了铁心多点接地故障,针对该类型的故障,在变压器不能立即退出运行的情况下,采取了加装限流电阻的处理方法,不但抑制了接地故障的发展,而且避免了一次发电机的非计划停机事故。

关键词: 变压器, 铁心, 多点接地, 三比值法

Abstract: A fault of transformer ironcore multipoint grounding was introduced. The fault was be confirmed by three ratios method. Due to that the transformer can not outage, the treatment method of adding currentlimiting resistor was adopted. Then, not only the growth of the grounding fault was be inhibited, but also a nonplanned shutdown accident was be avoided.

Key words: transformer, iron-core, multipoint grounding, three ratios method