中国电力 ›› 2018, Vol. 51 ›› Issue (5): 39-46.DOI: 10.11930/j.issn.1004-9649.201708278

• 安全专栏 • 上一篇    下一篇

一起330 MW汽轮机组异常跳闸原因分析及ETS系统改进

周旭战, 杨亚飞, 张顺利, 董建朋   

  1. 中国大唐集团科学技术研究院有限公司华中分公司, 河南 郑州 450000
  • 收稿日期:2017-09-25 修回日期:2018-01-24 出版日期:2018-05-05 发布日期:2018-05-07
  • 作者简介:周旭战(1975-),男,河南许昌人,硕士,工程师,从事火电机组热控调试、DCS改造、技术监督工作,E-mail:cdtzhouxuzhan@163.com;杨亚飞(1978-),男,河南新安人,硕士,高级工程师,从事火电机组热工自动化、控制技术研究,E-mail:yyfei1228@163.com;张顺利(1978-),男,河南叶县人,硕士,高级工程师,从事火电机组汽轮机调试、汽轮机调速系统故障诊断和研究,E-mail:14744650@qq.com

Analysis on an Abnormal Trip of a 330-MW Turbine Unit and the Improvement of Its ETS System

ZHOU Xuzhan, YANG Yafei, ZHANG Shunli, DONG Jianpeng   

  1. China Datang Corporation Science and Technology Research Institute Co., Ltd. Huazhong Branch Company, Zhengzhou 450000, China
  • Received:2017-09-25 Revised:2018-01-24 Online:2018-05-05 Published:2018-05-07

摘要: 通过一起330MW汽轮机组异常跳闸过程分析,阐明基于汽轮机逻辑保护卡(LPC卡)实现的危急遮断系统(ETS)原理,发现其存在保护与首出不一致的设计隐患。在无事件顺序记录(SOE)状况下,透过首出假象,分析跳闸过程数据,结合一系列EH油系统排查、比对试验,合理解释了ETS系统动作的真实原因,同时从设计原则、防止拒动、完善重要测点等方面,提出了改进ETS系统可靠性的具体措施。

关键词: 汽轮机组, 危急遮断系统, 汽轮机逻辑保护卡, 首出, EH油压, 自动停机遮断, 可靠性

Abstract: Through the analysis on the abnormal trip process of a 330-MW turbine unit, the principle of the logic protection card (LPC) based emergency trip system (ETS) system is clarified, and the design defect of the inconsistency between the protection and the first-out is identified. In the absence of SOE records, through the first-out illusion, the data in trip process are analyzed. Combined with a series of EH oil system investigation and comparison test, the real reason of the ETS system action is explained reasonably. Meanwhile, detailed measures to improve the reliability of the ETS system are proposed from the aspects of design principles, protection failure prevention and important measurement improvement.

Key words: steam turbine, emergency trip system, logic protection card, first-out, EH oil pressure, automatic shift trip, reliability

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