基于DMC-PID串级控制的超临界机组给水系统研究  

Research on supercritical unit water supply system based on DMC-PID cascade control

作　　者：马永光[1] 毛求福 MA Yongguang;MAO Qiufu(School of Control Science and Engineering,North China Electric Power University,Baoding 071003,China)

机构地区：[1]华北电力大学控制与计算机工程学院,河北保定071003

出　　处：《电力科学与工程》2018年第7期61-67,共7页Electric Power Science and Engineering

摘　　要：在超临界参数下,针对机组给水控制系统具有复杂多变、大惯性、大迟延等特点,提出了一种基于动态矩阵控制(Dynamic Matrix Control,DMC)和PID串级控制相结合的控制策略。首先对超临界机组给水控制系统被控对象的动态特性以及建立简化数学模型等进行了分析。其次根据动态矩阵控制原理建立了系统的DMC模型,从而设计了DMC-PID串级控制器。再运用蚁群算法(Ant Colong Optimization,ACO)对350 MW超临界机组的现场运行数据进行辨识,并优化DMC控制器参数。最后与传统PID控制进行了MATLAB仿真对比实验。结果表明DMCPID串级控制具有更好的稳定性和较快的调节速度,鲁棒性较好,抗干扰能力强。Under the condition of supercritical parameters,a control strategy based on dynamic matrix control（ DMC） and PID cascade control is proposed for the unit feed water control system with the characteristics of complex variability, large inertia, large delay, etc. Firstly, the dynamic characteristics of controlled objects in the water supply control system of supercritical units and the establishment of simplified mathematical models are analyzed. Secondly,according to the principle of dynamic matrix control,the DMC model of the system is established and DMC-PID cascade controller is designed. Then,the ant colony algorithm（ ACO） is used to identify the field operation data of a350 MW supercritical unit,and optimize the DMC controller parameters. Finally,the simulation experiment is conducted to make a comparison of the proposed control and traditional PID control inMATLAB. The results show that the DMC-PID cascade control has better stability and faster adjustment speed,and has strong robustness and anti-interference ability.

关 键 词：超临界机组 给水系统 串级控制 DMC-PID 蚁群算法 

分 类 号：TK223.7[动力工程及工程热物理—动力机械及工程]