中国电力2017，Vol.50Issue(6)：27-31,5.DOI:10.11930/j.issn.1004-9649.2017.06.027.05
1000MW二次再热火电机组主蒸汽温度控制策略及工程应用
The Control Strategy of Main Steam Temperature for a 1000-MW Double-Reheat Thermal Generation Unit and Its Application
摘要
Abstract
Aiming at the main steam temperature control of double-reheat units with time variation,large inertia and non-linearity,taking the characteristics of ultra-supercritical once-through boilers in consideration,the mechanism of the main steam temperature changing at the superheater outlet is studied.Then,a water spraying desuperheating control system is proposed based on the improved Smith predictor.The control strategies of the control system are designed for a 1000-MW ultra-supercritical double-reheat tower-type boiler.The practical operation shows that the control system have effectively tackled the large delay and large inertia problems in the main steam temperature control of ultra-supercritical double-reheat units,improved the dynamic control qualities of the main steam temperature and at the same time alleviated the tuning difficulties.关键词
燃煤发电/1000 MW/超超临界机组/二次再热循环/主蒸汽温度/Smith预估补偿器/示范工程Key words
coal-fired power generation/1000 MW/ultra-supercritical unit/double reheat cycle/main steam temperature/Smith predictor/demenstration power plant分类
信息技术与安全科学引用本文复制引用
崔青汝,牛海明..1000MW二次再热火电机组主蒸汽温度控制策略及工程应用[J].中国电力,2017,50(6):27-31,5.基金项目
国家科技支撑计划项目(2012BAA12B00).This work is supported by the National Key Technology Support Program (No.2012BAA12B00). （2012BAA12B00）
