基于预估模型切换的过热汽温无辨识自适应控制

针对电厂锅炉的过热汽温系统具有大惯性、大时滞和多模型等特性.研究一种基于预估模型切换的无辨识自适应预估控制方法.该方法需设计一个无辨识自适应预估控制器和基于主蒸汽流量变化率的切换律,给出若干个一阶预估模型.在系统运行过程中,这些预估模型在切换律控制下根据运行工况按优化切换时间自适应地切换,而其中的优化切换时间是用切换系统优化理论计算得到的.仿真试验结果表明,该方法适用于过热汽温系统,具有良好的控制品质、较强的抗扰和自适应能力,且对预估模型的精度要求不高,控制参数容易整定,易于工程实现.

Identification-free adaptive control of superheated steam temperature based on prediction model switchover

According to the characteristics of boiler superheated steam temperature system in power plant, such as big inertia,long time delay and multiple models,an identification-free adaptive predictive control based on prediction model switchover is developed.An identification-free adaptive predictive controller with several one-order prediction models and its model switchover law are designed based on the change rate of main stream flux.These prediction models are adaptively switched over with optimal switching t...