中国电力 ›› 2017, Vol. 50 ›› Issue (12): 62-67.DOI: 10.11930/j.issn.1004-9649.201608009

• 发电 • 上一篇    下一篇

再热凝汽式汽轮机阀门流量特性在线监测优化

盛锴1, 周年光2, 宋军英3, 雷滨1, 彭双剑1, 寻新1   

  1. 1. 国网湖南省电力公司电力科学研究院,湖南 长沙 410007;
    2. 国网湖南省电力公司,湖南 长沙 410007;
    3. 国网湖南省电力公司电力调度控制中心,湖南 长沙 410007
  • 收稿日期:2016-08-30 修回日期:2017-08-30 出版日期:2017-12-20 发布日期:2018-01-30
  • 作者简介:盛锴(1983—),男,湖南长沙人,硕士,高级工程师,从事源网协调研究与热工自动优化研究。E-mail:shengkai0815@163.com
  • 基金资助:
    国网湖南省电力公司科技项目(5216A515002D)

Online Monitoring and Optimization of Valve Discharge Characteristics for a Reheat Turbine

SHENG Kai1, ZHOU Nianguang2, SONG Junying3, LEI Bin1, PENG Shuangjian1, XUN Xin1   

  1. 1. State Grid Hunan Electric Power Corporation Research Institute, Changsha 410007, China;
    2. State Grid Hunan Electric Power Corporation, Changsha 410007, China;
    3. State Grid Hunan Electrical Power Dispatch & Control Center, Changsha 410007, China;
  • Received:2016-08-30 Revised:2017-08-30 Online:2017-12-20 Published:2018-01-30
  • Supported by:
    This work is supported by State Grid Hunan Electric Power Corporation Science and Technology Project (No. 5216A515002D).

摘要: 合理的阀门流量函数设置是火电机组功率线性控制的重要保障。当实际运行机组的阀门流量特性存在非线性而影响控制性能时,则需重新优化阀门流量函数。目前阀门流量函数的优化是以阀门流量特性试验结果为依据的。基于某电厂362.5 MW引进型机组上试验研究,提出一种阀门流量特性在线监测优化方法,利用DCS的历史数据监测机组实际的阀门流量特性并优化阀门流量函数,根据阀门流量特性的变化预先修正阀门流量函数,可避免由阀门流量特性引起的一次调频性能下降、功率振荡等问题。

关键词: 火电厂, 汽轮机, DCS, 阀门流量特性, 在线监测, 一次调频, 功率振荡

Abstract: The reasonable configuration of the discharge characteristic function of turbine governing valves is essential to linear power control for thermal power units. Then the discharge characteristic function of turbine governing valves shall be re-optimized when there exists any undesired nonlinearity of the discharge characteristics which may degrade the control performance. Currently, the optimization of the discharge characteristic function depends on the valve discharge characteristic experiment. In this paper, based on the test study of a 362.5 MW unit, a method of online valve discharge characteristics monitoring and optimization is proposed, which can observe the valve discharge characteristics and optimize the discharge characteristics function by using the historical DCS data. Furthermore, by virtue of this method the valve discharge characteristics function can be rectified in advance according to the changes of the valve discharge characteristics to avoid the performance degradation of primary frequency regulation and the power oscillations caused by the nonlinearity of the valve discharge characteristics.

Key words: thermal power plant, turbine, DCS, valve discharge characteristics, online monitoring, primary frequency regulation, power oscillations

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