基于动态矩阵控制的再热汽温控制系统  

Reheated steam temperature control system based on dynamic matrix control

作　　者：张嘉英[1] 王文兰[1] 

机构地区：[1]内蒙古工业大学电力学院,内蒙古呼和浩特010080

出　　处：《电力自动化设备》2010年第8期71-74,共4页Electric Power Automation Equipment

摘　　要：预测控制具有良好的动态响应和跟踪性能,但抗干扰性和鲁棒性差。针对火电厂再热器出口温度的大惯性、大延迟的特点,提出了一种改进的动态矩阵控制(DMC)算法,并采用串级控制结构,即内回路采用PID控制快速消除给水流量的扰动,外回路采用带前馈补偿的DMC控制克服蒸汽流量的扰动。将DMC算法和串级控制相结合,充分发挥了PID抗干扰性和DMC对惯性、延迟适应能力强的优点。仿真结果表明,该方案对再热汽温控制系统具有较强的鲁棒性及良好的抗扰动性能,提高了系统的动、静态性能指标,DMC-PID串级控制系统总体性能优于PID-PID串级控制系统。Predictive control has good dynamic response and tracking performance but poor anti-interference ability and robustness.As the output steam temperature of reheater in thermal power plant has large inertia and long time delay,the improved DMC（Dynamic Matrix Control） algorithm is proposed,which applies the cascade control structure：the inner loop PID control to quickly eliminate the disturbance of feed water flow and the outer loop DMC control with feedforward compensation to overcome the disturbance of steam flow.It combines DMC algorithm with cascade control to takes advantage of PID’s anti-interference ability and DMC’s adaptability to inertia and delay.Simulative results show that,with better robustness and anti-disturbance performance,it improves the dynamic and static system performance.The DMC-PID cascade control system is superior to PID-PID cascade control system.

关 键 词：动态矩阵算法 DMC-PID串级控制 再热汽温控制系统 MATLAB仿真 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]