基于二自由度Smith预估补偿策略的脱硝控制方法研究
Research on Denitrification Control Method Based on Two-degree-of-freedom Smith Predictive Compensation Strategy
季哲恺 1崔晓波 1盖青松 1张旭阳 1李春涛1
作者信息
- 1. 南京工程学院 能源与动力工程学院 江苏 211167
- 折叠
摘要
为了解决火电机组脱硝系统大延迟大惯性及传统Smith预估补偿控制抗扰与设定值跟踪性能的折中选择问题,引入二自由度Smith预估补偿控制策略,对火电机组脱硝进行控制系统设计,实现了设定值跟踪性能与抗扰性能的解耦.通过仿真研究,结果表明与传统脱硝串级控制及传统Smith预估补偿控制相比,能使调节时间相对于传统脱硝串级控制减少 36%,在受到扰动后的最大动态偏差减少52%,调节速度快 3～4 倍,具备更佳的设定值跟踪和抗扰能力,同时算法实现简单无需复杂的编程仅通过DCS组态模块搭建即可实现,具备较大的应用与推广价值.
Abstract
To solve the problem of large delay and large inertia of denitrification system of thermal power units,and the compromise of tra-ditional Smith predictive compensate control between the anti-disturbance and setpoint tracking performance,a two-degree-of-freedom Smith predic-tive compensation control strategy was introduced to design the control system for denitrification of thermal power units,realizing the decoupling of setpoint tracking performance and anti-disturbance performance.By simulation research,the results illustrate that compared with the traditional de-nitrification cascade control and the traditional Smith predictive compensation control,the proposed method can reduce the adjustment time by 36%compared with the traditional denitrification cascade control,reduce the maximum dynamic deviation after disturbance by 52%,and the adjustment speed is 3～4 times faster,with better setpoint tracking and anti-interference ability.The algorithm can be applied easily without complex program-ming,and it can be simply realized by the construction of DCS configuration module,which has great value of application and promotion.
关键词
脱硝/二自由度/Smith预估补偿Key words
denitrification/two-degree-of-freedom/Smith predictive compensate引用本文复制引用
出版年
2025
NETL
NSTL
万方数据