华电技术 ›› 2010, Vol. 32 ›› Issue (7): 26-30.

• 研究与开发 • 上一篇    下一篇

发电机过激磁保护误动原因分析

涂义元   

  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:2010-07-25 发布日期:2010-07-25

Analysis on the reasons of the false tripping of the generator overexcitation protection

TU Yiyuan   

  1. Hunan Huadian Changsha Power Generation Corporation Limited, Changsha 410203, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-07-25 Published:2010-07-25

摘要: 2009年3月24日,湖南华电长沙发电有限公司 #2机组在并网过程中因发电机过激磁保护误动而使已并网的发电机解列。根据保护故障录波图和保护动作报文及其机组并网的全过程跟踪情况,分析了保护误动的原因及发电机并网顺控逻辑经常陷入死循环的原因,探讨了发电机深度进相运行存在的问题,根据现场实际情况采取了相应的防范措施。

关键词: 机组并网, 发电机过激磁保护, 保护误动, 原因分析, 防范措施

Abstract: In March 24, 2009, during connection into the power grid of the Unit No.2 of Hunan Huadian Changsha Power Generation Limited, the connected generator was disconnected due to the incorrect tripping of the overexcitation protection. According to the record diagram of the protection fault recorder, the protection acting report and the tracking records of the whole connection operation process, the reasons of the protection incorrect tripping were analyzed; and the reasons of the endless loop of the sequential control logic were analyzed too. The problems existed in generator deeply underexcitation operation were discussed. Some relevant preventive measures were adopted in accordance with site practical situation.

Key words: unit connection into grid, generator over-excitation protection, protection incorrect tripping, reason analysis, preventive measure