基于局部模型网络的主汽温阶梯式动态矩阵控制  

Stair-like Dynamic Matrix Control of Main Steam Temperature Based on Local Model Network

作　　者：石轲 董泽[1,2] 孙明[1,2] SHI Ke;DONG Ze;SUN Ming(a.Department of Automation,North China Electric Power University,Baoding 071003,China;Hebei Power Generation Process Simulation and Optimization Control Technology Innovation Center,North China Electric Power University,Baoding 071003,China)

机构地区：[1]华北电力大学自动化系,河北保定071003 [2]华北电力大学河北省发电过程仿真与优化控制技术创新中心,河北保定071003

出　　处：《控制工程》2024年第10期1812-1822,共11页Control Engineering of China

基　　金：中央高校基本科研业务费专项资金资助项目(2017MS187)。

摘　　要：火电厂主汽温系统的大惯性、时变性和多扰动等特点导致采用传统串级PID控制难以取得令人满意的控制效果。为了克服传统控制方案的缺陷,提出了一种基于局部模型网络的多模型阶梯式动态矩阵控制算法。首先,通过引入阶梯式策略有效解决了原始动态矩阵控制算法固有的矩阵求逆问题;其次,通过引入扰动前馈补偿,提高了主汽温系统的抗扰动能力;最后,针对不同工况下动态特性大幅度变化的主汽温对象,设计了基于局部模型网络的多模型阶梯式动态矩阵控制器。仿真结果表明,相比于传统控制算法,所提算法明显提升了主汽温系统的全局设定值跟踪性能、抗扰动性能和鲁棒性能,可以满足火电机组主汽温的控制要求。The main steam temperature system in thermal power plant has the characteristics of large inertia,time variability and multi-disturbance,which makes it difficult to achieve satisfactory control effect by using traditional cascade PID control.In order to overcome the shortcomings of traditional control schemes,a multi-model stair-like dynamic matrix control algorithm based on local model network is proposed.Firstly,by introducing the stair-like strategy,the inherent matrix inversion of the original dynamic matrix control algorithm is effectively solved.Secondly,by introducing disturbance feedforward compensation,the anti-disturbance ability of main steam temperature system is improved.Finally,for the main steam temperature object whose dynamic characteristics change greatly under different working conditions,a multi-model stair-like dynamic matrix controller based on local model network is designed.The simulation results show that compared with the traditional control algorithms,the proposed algorithm has significantly improved the global set point tracking performance,anti-disturbance performance and robustness of the main steam temperature system,and can meet the requirements of main steam temperature control of thermal power units.

关 键 词：动态矩阵控制 阶梯式策略 多模型预测控制 局部模型网络 主汽温控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]