1050MW超超临界机组给水控制系统优化

Optimization of feedwater control system for 1 050 MW ultra-supercritical power unit

为提高机组的自动化控制水平,对华电莱州发电有限公司1 050 MW超超临界机组给水控制系统的给水控制策略进行了优化。将给水控制系统控制策略修改为以煤为主,通过同时调整燃料和给水来控制煤水比。采取了增加过热度控制回路、给水流量设定值增加锅炉燃烧仿真回路等优化措施,优化后的稳定负荷试验表明,机组的相关重要参数运行指标均合格,完善了协调控制品质并促进了节能降耗。

In order to improve the automatic control level,some feedwater control strategy optimization measures were adopted for the 1 050 MW ultra-supercritical power unit of Huadian LaizhouPower Generation Company Limited,such as changing the feedwater control strategy to coal-dominated strategy,controlling the coal-water ratio by adjusting the fuel and water supply,adding superheat control circuit,and adding boiler combustion simulation circuit for feedwater flow setpoint,etc. After the feedwater control strategy optimization,the result of steady load test shows that the operating indicators ofimportant parameters related to the power unit are qualified,which improves the quality of coordination control and contributes to the energy-saving and cost-reducing.