摘要
针对再热汽温控制系统控制变量多、控制难度大等问题,提出了一种基于Smith控制与预测函数控制(PFC)的多变量控制快速计算方法。首先,将再热汽温多变量控制系统分解为三个单变量控制系统,在每个单变量控制系统中,将其中两个控制量作为干扰项;其次,根据Smith控制思想,设计每个单变量控制系统;最后在改进预测函数控制的性能指标的基础上,综合考虑三个单变量控制系统,实现对再热汽温度的控制。再热汽温控制仿真实验表明所提方法的计算速度是传统约束条件下预测控制的50倍左右,并且调整参数少,物理意义明确。实验结果表明该算法在现场使用中能够有效地提高再热汽温控制品质。
The reheat steam temperature control system has the problems of multivariable control, difficult control, and so on. In order to solve the problems, a fast calculation method of multivariable control for reheat steam temperature was proposed,which was based on Smith control method and Predictive Functional Control（ PFC） method. First of all, the reheat steam temperature multivariable control system was decomposed into three single-variable control systems. In every singlevariable control system, the other two control volumes were taken as the interference terms. Secondly, according to Smith control idea, every single-variable control system was designed. Finally, on the basis of improving the performance index of the predictive functional control, three single-variable control systems were considered synthetically to realize the reheat steam temperature control. The simulation results of reheat steam temperature control show that with less parameters and explicit physical meaning, the proposed method is about 50 times as fast as the traditional predictive control with constraint conditions.The experimental results show that the proposed algorithm can effectively improve the quality of the reheat steam temperature control in the field.
出处
《计算机应用》
CSCD
北大核心
2015年第12期3597-3601,共5页
journal of Computer Applications
基金
国家自然科学基金资助项目(61473034)
高等学校博士学科点专项科研基金资助项目(博导类)(20130006110008)
关键词
多变量预测函数控制
Smith控制方法
再热汽温控制
烟气挡板
燃烧器摆角
喷水减温
模型失配
multivariable predictive functional control
Smith control method
reheat steam temperature control
flue gas damper
burner angular
spray water cooling
model mismatch component
