一种改进型广义预测控制系统研究及工程应用Research and Engineering Application of an Improved Generalized Predictive Control System
李泉,尹峰,孙坚栋,罗志浩
LI Quan,YIN Feng,SUN Jiandong,LUO Zhihao
摘要(Abstract):
常规的广义预测控制算法在对象模型已知时,通过求解丢番图方程获得最优控制律,但是对模型精确度要求较高,不能适应工程需要,因此,提出一种改进型广义预测控制系统,当已知模型的参数变化时仍具有良好的控制性能。为了提高系统克服外扰的能力,还设计了扰动通道算法,形成带扰动模型的广义预测控制系统,将该系统应用于某600 MW超临界机组的脱硝控制系统中,通过建立系统对象模型和扰动模型来预测被控对象未来的变化趋势,当对象模型发生变化时,系统仍具有较强的鲁棒性。
The optimal control law is obtained by solution of Diophantine equation in the case of a given object model. However, the requirement on model accuracy is so stringent that it can not cater to engineering use. This paper proposes an improved generalized predictive control system that owns control performance in the case of model parameter change, In order to improve the ability of the system to overcome the external disturbance, the disturbance channel algorithm is designed to form a generalized predictive control system with disturbance model. The system is applied to the denitrification control system of a 600 MW supercritical unit to predict the future trend of the controlled object through establishment of the system object model and the disturbance model; in the case of object model change, the system is still strongly robust.
关键词(KeyWords):
广义预测;鲁棒;扰动;脱硝控制;模型
generalized forecast;robust;disturbance;denitration control;model
基金项目(Foundation): 国网浙江省电力公司科技项目(5211DS1350JZ)
作者(Author):
李泉,尹峰,孙坚栋,罗志浩
LI Quan,YIN Feng,SUN Jiandong,LUO Zhihao
DOI: 10.19585/j.zjdl.201708009
参考文献(References):
- [1]朱北恒.火电厂热工自动化系统试验[M].中国电力出版社,2006.
- [2]席裕庚.预测控制[M].国防工业出版社,1993.
- [3]舒迪前.预测控制系统及应用[M].机械工业出版社,1996.
- [4]王伟.一种新的广义预测自适应控制直接方法[J].自动化学报,1996,22(3):270-277.
- [5]李小田,等.一种基于多模型切换的阶梯式广义预测控制算法[J].化工学报,2012,63(1):193-197.
- [6]郭伟,王伟.一种改进的广义预测控制算法分析与应用[J].控制理论及其应用,2008,30(2):9-13.
- [7]李泉,等.超临界机组脱硝系统模型预测控制研究[J].浙江电力,2016,35(11):34-36.
- [8]刘韬.火电机组脱硝系统测量与控制策略问题分析及优化[J].浙江电力,2016,35(6):42-44.
- [9]石磊.燃煤锅炉SCR法烟气脱硝技术[J].锅炉技术,2009,40(2):76-80.
- [10]刘晓敏.烟气脱硝SCR装置喷氨优化研究[J].热力发电,2012,41(7):81-83.
- [11]刘长良,等.一种改进的遗传算法及其在热工过程控制中的应用[J].自动化仪表,2002,23(9):13-16.
- [12]林建勇.选择性催化还原脱硝工艺及控制系统[J].太原科技,2007(9):73-74.