华电技术 ›› 2009, Vol. 31 ›› Issue (9): 31-33.

• 研究与开发 • 上一篇    下一篇

浅析发电厂主变压器中性点的保护及运行

俞立凡   

  1. 杭州华电半山发电有限公司,浙江杭州 310015
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-09-25 发布日期:2009-09-25

Analysis of neutral point protection and operation of main transformer in power plant

YU Lifan   

  1. Hangzhou Huadian Banshan Power Generation Corporation Limited, Hangzhou 310015, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-09-25 Published:2009-09-25

摘要: 介绍了发电厂主变压器中性点保护常用的间隙、避雷器及避雷器联合放电间隙3种方式,阐述了变压器中性点间隙零序过电流保护原理及主变压器中性点接地要求。提出了变压器中性点运行操作中的注意事项,以保证中性点操作合理,避免各种操作隐患。

关键词: 变压器, 中性点保护, 间隙过流, 运行操作

Abstract: The common three main transformer neutral point protection methods were introduced, which are gap, lightning arrester and lightning arrester combined spark gap. The principle of zero sequence overcurrent protection in transformer neutral point gap was expounded, the earthing request of main transformer neutral point was described. In order to ensure rational operation and avoid operation hidden danger, the maters needing attention in transformer neutral point operation were given in this paper.

Key words: transformer, neutral point protection, gap over-current, operation