模型随工况大范围变化的过热汽温μ综合  

μ-synthesis for boiler superheated steam temperature system with different perturbed model

作　　者：恒庆海[1] 麦苗[1] 鲁婧[1] 恒庆珠[2] 黄春梅[2] 

机构地区：[1]北京信息工程学院,北京100101 [2]天津大学,天津300072

出　　处：《电工电能新技术》2005年第1期14-17,共4页Advanced Technology of Electrical Engineering and Energy

基　　金：北京市教育委员会科技发展计划资助项目(KM200310772125);北京信息工程学院博士科研基金项目资助

摘　　要：对某超临界600MW直流锅炉高温过热器导前区及惰性区均具有模型摄动的过热汽温μ综合鲁棒控制问题进行了研究。该被控对象在工况大范围变化时,模型(包括时间常数、增益、甚至对象阶次等)有很大的变化。对此提出了μ综合鲁棒PID汽温控制系统设计方法。讨论了该模型摄动不确定性权函数及性能权函数的选择,求解了μ综合鲁棒PI控制器。该控制器的实现,不需要增加现有控制设备额外的开支。仿真结果表明,本文设计的汽温控制系统具有较好的鲁棒性能。This paper presents the μ-synthesis problem of the perturbed model of the leading and inertia sections of the superheater of a supercritical once-through 600MW boiler. The strong change (including time constant, gain, even the orders etc.) of the model of the controlled member occurs as the operating conditions are changed extensively. A design method of μ-synthesis PID control system is proposed, the selections of weighting functions are discussed and the μ-synthesis robust PI controllers are solved. Results of the design look as if they were normal PI controllers, but their control quality, robustness and adaptability are better than the latter, and their structures are simple, definite, and useful. The realization of the controllers doesn't involve extra cost to the control equipment in existence. The results show that the proposed method is valid.

关 键 词：过热汽温 摄动 Μ综合 鲁棒控制 

分 类 号：TM621.4[电气工程—电力系统及自动化]