SCR脱硝系统线性自抗扰鲁棒PID控制  

Linear Active Disturbance Rejection Robust PID Control of SCR Denitration System

作　　者：张洪敏 牛海明 马增辉 ZHANG Hong-min;NIU Hai-ming;MA Zeng-hui(Beijing Engineering Research Center of Power Station Automation,CHN Energy Zhishen Control Technology Co.,td.,Beijing,China,102200;College of Ocean Information Engineering,Hainan Tropical Ocean University,Sanya,China,572022)

机构地区：[1]国能智深控制技术有限公司北京市电站自动化工程技术研究中心,北京102200 [2]海南热带海洋学院海洋信息工程学院,海南三亚572022

出　　处：《热能动力工程》2022年第10期169-174,188,共7页Journal of Engineering for Thermal Energy and Power

基　　金：北京市科技计划项目(Z201100004520027);海南热带海洋学院科研项目(RHDRC202004)。

摘　　要：火电机组的深度调峰加剧了对选择性催化还原法(selective catalytic reduction, SCR)脱硝系统的干扰,为此提出了一种线性自抗扰鲁棒PID控制方法。2阶线性自抗扰控制(LADRC)可以直接近似为PID,也可以等价为理想PID+2阶滤波器的结构。采用实际PID+2阶滤波器的结构控制具有强干扰和不确定性的SCR脱硝系统,利用混合灵敏度的方法整定实际PID和2阶滤波器参数。仿真结果表明,实际PID+2阶滤波器的结构具有较好的抗扰性,更好地继承了LADRC的特点,控制品质优于由LADRC直接近似为PID的控制。The deep peak regulation of thermal power units intensifies the disturbance of selective catalytic reduction(SCR)denitration system.In this paper,a linear active disturbance rejection robust PID control method is proposed.The 2 nd-order linear active disturbance rejection control(LADRC)can be approximated as PID or equivalent to the structure of ideal PID plus 2 nd-order filter.The structure of actual PID plus 2 nd-order filter is used to control SCR denitration system with strong disturbance and uncertainty.The parameters of actual PID and 2 nd-order filter are tuned by robust control design method.The simulation results show that the structure of actual PID plus 2 nd-order filter has better disturbance rejection performance,and better inherits the characteristics of LADRC.Its control performance is better than the PID control derived directly from LADRC.

关 键 词：深度调峰 SCR 线性自抗扰控制 鲁棒控制 2阶滤波器 抗干扰 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]