基于ITAE最优控制律的CFB锅炉优化控制  

Optimization Control of CFB Boiler Based on ITAE Optimal Control Law

作　　者：杨婷婷[1] 洪烽 

机构地区：[1]华北电力大学工业过程测控新技术与系统北京市重点实验室,北京102206

出　　处：《华北电力大学学报（自然科学版）》2016年第1期65-70,共6页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家重点基础研究发展计划项目(973计划)(2012CBC215203)

摘　　要：在循环流化床(CFB)锅炉燃烧自动控制系统中,床温与主蒸汽压力耦合比较严重,常规控制算法的控制效果不是很理想。通过分析CFB锅炉的燃烧机理和动态特性,设计了部分前馈解耦控制器,实现了床温和主蒸汽压力的解耦。解耦后得到两个一阶惯性大迟延系统模型,针对CFB锅炉燃烧系统纯迟延较大对控制带来的挑战,应用ITAE最优控制率,对工业现场最常见的PI控制回路进行二次优化控制,并给出了控制器参数的求取方法。仿真结果说明该方法优化的结果各个性能指标较好。此优化方法算法简便,控制效果理想,且适合工程应用。In the circulating fluidized bed （CFB） boiler combustion automatic control system, the bed temperature couples seriously with main steam pressure. Therefore, the conventional control algorithm can not achieve its ideal effect. Based on the analysis of the combustion mechanism and dynamic characteristics of CBF boilers, partial feed-forward decoupling is proposed and it can successfully convert the transfer function of the main steam pressure and bed temperature to two independent loops. The decoupled loops are in the form of one step with big delay. To meet the challenge of CFB boiler combustion system by big delay, the ITAE optimal control rate is applied to the most common PI control circuit, combining the rapidity and accuracy of control systems. Based on this criteria, the design and parameters tuning method of PI controller are provided, which can realize the effective control of this kind of controlled objects. The simulation results indicate that the system, to which this method has been applied, has a better control performance. Overall, it is found that this simple optimal control can achieve its ideal control effect, which is suitable for the engineering application.

关 键 词：CFB锅炉 ITAE最优控制律 优化控制 

分 类 号：TK323[动力工程及工程热物理—热能工程]