华电技术 ›› 2012, Vol. 34 ›› Issue (11): 6-9.

• 专题综述 • 上一篇    下一篇

600MW机组数字电液调节系统失电保护方案的优化

周世盼,王胜,胡民宗   

  1. 河北大唐国际王滩发电有限责任公司,河北唐山063611
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-11-25 发布日期:2012-11-25

Optimization of DEH power failure protection of 600MW unit

ZHOU Shipan, WANG Sheng, HU Minzong   

  1. Hebei Datang International Wangtan Power Generation Company Limited,Tangshan 063611, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-11-25 Published:2012-11-25

摘要: 介绍了河北大唐国际王滩发电有限责任公司高压抗燃油型数字电液调节系统(DEH)的电源配置情况,以及DEH失电时汽轮机跳闸停机保护方案的实现方式,分析了原设计方案存在的不足及安全隐患,通过机组大修对DEH失电保护方案进行优化,将单点保护改为“三取二”、“二取二”保护,同时对DEH控制柜电源失电报警进行了优化,提高了机组的安全性和可靠性。

关键词: 600MW机组, 数字电液调节系统, 汽轮机, 跳闸停机保护, 保护优化

Abstract: The power supply configuration of highpressure fireresistant oil type DEH of Hebei Datang International Wangtan Power Generation Company Limited was introduced, and the implementation of steam turbine tripping shutdown protection scheme when the DEH power supply is failure was described. The defects and the hidden safety hazard in original design scheme were analyzed. The DEH power failure protection scheme was optimized in the unit overhaul. The original single point protection was changed to the ‘two out of three’ and ‘two out of two’protection, the power failure alarm scheme of DEH control cabinet was optimized simultaneously. The safety and the reliability of the unit were improved.

Key words: 600MW unit, digital electro-hydraulic control system (DEH), steam turbine, tripping shutdown protection, protection optimization