中国电力 ›› 2014, Vol. 47 ›› Issue (3): 69-73.DOI: 10.11930/j.issn.1004-9649.2014.3.69.4

• 发电 • 上一篇    下一篇

凝结水节流控制与经济效益分析

钱能1, 金生祥2, 王琪2, 赵岩2, 王六虎3   

  1. 1. 清华大学 热能工程系,北京 100084;
    2. 京能集团,北京 100004;
    3. 内蒙古京隆发电有限公司,内蒙古 丰镇 012100
  • 收稿日期:2013-12-26 出版日期:2014-03-31 发布日期:2015-12-18
  • 作者简介:钱能(1988-),男,浙江嘉兴人,硕士研究生,从事火电机组协调控制研究。E-mail: money8886@126.com

Economic Benefit Analysis and Control Logic of Condensate Throttling

QIAN Neng1, JIN Sheng-xiang2, WANG Qi2, ZHAO Yan2, WANG Liu-hu3   

  1. 1. Department of Thermal Engineering Tsinghua Beijing 100084;
    2. Beijing Energy Investment Holding Co., Ltd. Beijing 100004;
    3. Inner Mongolia Jinglong Electric Power Generation CO, LTD, Fengzhen 012100
  • Received:2013-12-26 Online:2014-03-31 Published:2015-12-18

摘要: 凝结水节流参与火电机组负荷调节,可以在提高或者不降低机组负荷响应性能的条件下,有效降低汽轮机调节阀的节流损失,提高机组运行的经济性和安全性。在分析凝结水节流动态模型的基础上辨识得到了某600 MW机组凝结水流量与负荷之间的传递函数,提出了凝结水节流的模糊自适应控制算法,在此基础上开发的凝结水节流控制系统在某600 MW亚临界机组上实际投运,效果良好。试验结果表明,在保证机组安全性的情况下,对凝结水最大节流幅度为800 t/h左右,调节负荷的响应时间为10 s,负荷响应幅值为9 MW; KP值(机组所在电网考核机组调节性能综合指标)提高了10%左右,并且在400、450、500 MW 3个典型负荷点高压缸效率提高1.42%、1.20%、0.99%,平均降低煤耗约1.77、1.26、0.91 g/(kW·h),从而证明了凝结水节流控制对负荷响应速度提高和经济性提高的有效性。

关键词: 火电机组, 负荷调节, AGC响应速率, 凝结水节流, 节能, 控制算法

Abstract: Load adjustment of power plants with the condensate throttling can reduce the throttle loss of governing stage and improve the operation economy and security, without the loss of response performance. This article identifies the condensate flow-load’s transfer function of certain 600 MW plant by analyzing condensate throttling dynamic model, and give out a fuzzy adaptive control algorithm, based on which the control system works well in field operation. The result shows that the max range of condensate throttling is about 800 t/h under secure conditions. The response time for load is 10 s, and the load amplitude of the response is 9 MW. Grid assessment indicators value KP increases about 10%, and efficiencies of HP increase 1.42%, 1.20% and 0.99% on load point 400, 450 and 500 MW, which decease average coal consumption by 1.77, 1.26, 0.91 g/(kW·h), indicating the economy benefits and improvement in load control of condensate throttling.

Key words: power unit, load regulation, AGC response rate, condensate throttling, energy saving, control algorithm

中图分类号: