中储式钢球磨煤机制粉系统控制研究  

Control of ball mill storage pulverized coal system

作　　者：徐玮[1] 冯晓露[1] 孙坚栋[1] 张政江[1] 

机构地区：[1]浙江大学能源工程学系,浙江杭州310027

出　　处：《热力发电》2014年第7期87-91,共5页Thermal Power Generation

摘　　要：火电厂中储式制粉系统钢球磨煤机(球磨机)为多变量耦合、大滞后及非线性复杂被控对象,传统采用的3套独立PID控制系统不具有自适应性和解耦性,故自动控制效果不理想。为此,以火电厂中储式制粉系统球磨机为对象,基于预测控制对其进行了控制研究,提出了球磨机控制方法和存在问题,给出了仿真模型,并对球磨机模型预测控制与常规PID控制进行仿真比较。结果表明,模型预测控制较常规PID控制,控制效果具有显著改善。Ball coal mill system is a complicated obj ect with characteristics of multi-variety coupling,nonlinear and time-delay.The conventional independent three sets of PID controlling systems have no auto adaptability and decoupling ability,so it cannot work steadily for long term and the control effect is not good.By taking the thermal power plant＇s ball mill pulverizing control system as the research obj ect,the ball mill pulverizing control system＇s control method and existing problems were investigated,from the view of predictive control.Moreover,the simulation model was established,and simulation comparison between model predictive control and PID control was carried out.The results show that the model predictive control can obtain fairly good results.

关 键 词：中储式粉制系统 球磨机 预测控制 PID控制 解耦 

分 类 号：TK223.25[动力工程及工程热物理—动力机械及工程] TK323