中国电力 ›› 2015, Vol. 48 ›› Issue (11): 1-6.DOI: 10.11930.2015.11.1

• 发电 •    下一篇

基于阀点优化的1 000 MW超超临界机组节能优化控制技术

朱亚清,张曦   

  1. 广东电网有限责任公司电力科学研究院,广东 广州 510080
  • 收稿日期:2015-06-17 出版日期:2015-11-18 发布日期:2015-11-18
  • 作者简介:朱亚清(1975—),男,广东电白人,高级工程师(教授级),从事火电厂自动化控制系统的研发、调试、试验、系统分析与优化、可靠性分析研究、热工技术监督等工作。E-mail: zhuyaqing@163.com

Online Sliding Pressure Optimization of 1 000-MW Ultra Supercritical Unit Based on Valve Point Control

ZHU Yaqing, ZHANG Xi   

  1. Guangdong Electric Power Research Institute, Guangzhou 510080, China
  • Received:2015-06-17 Online:2015-11-18 Published:2015-11-18

摘要: 针对目前1 000 MW超超临界机组滑压优化运行中存在的问题,分析了凝汽式机组真空变化和抽汽变化对发电机组最优滑压曲线的影响,提出一种以汽轮机阀门开度为控制目标的滑压曲线在线节能优化调整控制策略,结合协调控制系统(CCS)的优化,加快了主蒸汽压力和机组负荷的响应速率,提高了CCS控制品质,实现主蒸汽压力快速、平稳过渡到最佳滑压曲线上,很好地解决了滑压优化带来的CCS控制问题。通过在2台1 000 MW 超超临界机组上的实际应用表明,无论环境温度、抽汽量如何变化,机组始终能在最佳的滑压状态运行,实现了机组经济运行的目的。

关键词: 超超临界机组, 滑压优化, 阀点优化, 协调控制, 节能

Abstract: Aiming at the existing problem in the optimization of sliding pressure, the effects of back-pressure vacuum and extraction volume on optimal sliding curve are analyzed for the condensing turbine. The online energy-saving control strategy targeting at valve point optimization is proposed, which can improve the response of main steam pressure and unit load in combination with CCS optimization. Thus the CCS control quality is enhanced and the main steam pressure can change along the optimal sliding curve quickly and smoothly. In this way the CCS control problem caused by sliding pressure optimization is resolved. Through the applications on two 1 000-MW ultra supercritical units, it is shown that the units are able to operate always along the optimal sliding pressure curve no matter how the ambient temperature or the extraction volume changes. Therefore, the objective of economic operation is achieved.

Key words: ultra super critical pressure unit, sliding pressure optimization, value point optimization, coordination control, energy saving

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