摘要
研究了一种超临界压力锅炉给水及过热汽温的自适应逆控制方法。通过锅炉系统动态特性分析,构造了锅炉给水及过热汽温控制对象逆动力学模型输入向量结构,采用递推最小二乘支持向量机实现逆动力学模型的在线辨识,建立自适应逆控制系统,同时考虑直流锅炉出口汽温以及微过热汽温等对给水量和各级喷水量的共同需要,实现直流锅炉给水及过热汽温的综合控制。仿真试验表明,该控制系统具有良好的控制品质和自适应能力,并能有效地消除汽温分段控制方法中存在的控制量反复振荡现象。
An adaptive inverse control method for feed water and superheated steam temperature of supercritical pressure boiler is investigated. Through the analysis of the boiler system＇ s dynamic characteristics, the input vector structure of inverse dynamics model of feed water and superheated steam temperature is constructed. The adaptive inverse control system is realized through on-line identification of inverse dynamic model with recursive least squares support vector machine. In the control process, the demand for feed water and spray water flow to the outlet steam temperature and micro-superheated steam temperature is considered to realize the integrated control of feed water and superheated steam temperature. Simulation results show that this control system has good control performance and adaptability and can void the repeated oscillation phenomena of control variables which appear in present two section control system.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第2期32-36,共5页
Journal of Chongqing University
基金
国家自然科学基金资助项目(51176211
50776103)
中央高校基本科研业务费资助项目(CDJZR10140003)
关键词
超临界压力锅炉
自适应逆控制
最小二乘支持向量机
逆动力学模型
辨识
supercritical pressure boiler
adaptive inverse control
least squares support vector machine
inverse dynamic model
identification
