华电技术 ›› 2015, Vol. 37 ›› Issue (7): 40-42.

• 技术交流 • 上一篇    下一篇

一起PT二次回路短路引起的启停机保护动作分析

  

  1. 山西漳山发电有限责任公司,山西长治〓046021
  • 出版日期:2015-07-25 发布日期:2015-10-09

Analysis of start and stop protection action caused by short circuit of PT secondary circuit

  1. Shanxi Zhangshan Power Generation Company Limited, Changzhi 046021, China
  • Online:2015-07-25 Published:2015-10-09

摘要:

摘要:针对某电厂一起PT二次回路短路引起的发电机启停机保护动作故障,经故障查找、处理及发电机定子接地原理分析,最终确定PT二次回路引出线端子处短路。给出了区分定子一次设备接地与二次回路短路的方法,并提出了相应的建议。

关键词: 关键词:启停机保护, PT二次回路, 短路, 定子接地

Abstract:

Abstract:In a power plant, a short circuit fault of PT secondary loop occurred and caused the generator start and stop protection to act. Based fault seeking, fault treatment and analysis on generator stator grounding principle, it was determined that a short fault occurred in output terminals of PT secondary loop. The method to distinguish the stator primary equipment grounding fault and the secondary loop short circuit fault was given, and relevant suggestions were proposed.

Key words: Keywords:start and stop protection, PT secondary circuit, short circuit, stator grounding