摘要
针对电站锅炉具有大惯性、大纯滞后、强干扰等特点,采用最小二乘和相关系数辨识相结合的方法建立系统数学模型;构造带前馈的串级控制器调节主蒸汽温度,控制器外环采用阶梯式广义预测控制,内环为PID(proportional-integral-derivative)控制;设计并使用了智能监督级,保证了先进控制的投用率.实际运行情况表明,该先进控制系统具有良好的控制品质.
Boilers in power stations have the characteristics of large time constant, large pure time delay and strong disturbances. A model was proposed based on least squares method （LSM） and correlation coefficient identification approach, and a cascade controller was constructed with feedforward for mainsteam temperature. Stair-like generalized predictive control was used in the outer-loop of the controller and PID control was used in the inner-loop. The supervisory shell for the controller was designed and used to increase its running-time. Application shows good quality of the advanced control system.
基金
教育部新世纪优秀人才支持计划(NCET-04-0564)
安徽省优秀青年科技基金(0404202046)资助
关键词
系统辨识
广义预测控制
监督级
工业锅炉
温度控制
system identification
generalized predictive control
supervisory shell
industrial boiler
control of temperature
