电厂锅炉燃烧过程控制改进方案及实现  

Improved Scheme and Implement for Boiler Combustion Process of Thermal Power Plant

作　　者：薛福珍[1] 刘涛[1] 尹君[1] 梁远[2] 刘洪卫[2] 梁国杰[2] 

机构地区：[1]中国科学技术大学自动化系,安徽合肥230027 [2]北京京能热电股份有限公司,北京100041

出　　处：《控制工程》2008年第2期124-126,130,共4页Control Engineering of China

基　　金：安徽省发改高技基金资助项目(2005661)

摘　　要：针对锅炉燃烧系统多变量、强耦合、大时滞的复杂特性,提出一种多变量时滞对象的控制方法,以动态风煤比的形式对燃烧过程实施先进控制。所实现的改进的多变量Smith预估算法有效地克服了模型失配对控制的不利影响;多模型智能控制解决了在负荷变化时对象模型的参数不确定性。对某热电厂锅炉燃烧过程的控制结果表明,该方法易于工程实现,适应性强,控制效果优于原DCS系统的PID控制。According to the complex features of the boiler combustion system with multivariables, strong interaction and large time delay, a control algorithm of multl-variable object with time delay is presented, so as to implement advanced control on combustion process using dynamic air-to-coal ratios. The modified multi-variable Smith predictor effectively overcomes the disadvantage of unmatched model. The multiple-model intelligent control solves the parameter uncertainty of the object model when load changing. The control results of the boiler combustion process of certain thermal power plant show that the method posseses porformanees of easy implementing and wide adaptabihty compared with PID control in DCS.

关 键 词：锅炉燃烧系统 多变量时滞控制 多模型 动态风煤比 多变量Smith预估器 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]