论文标题:关于循环流化床锅炉床温控制系统的研究
Study on the Bed Temperature Control System of the Circulating Fluidized Bed Boiler
论文作者
论文导师 边立秀；杨建蒙,论文学位 硕士,论文专业 热能工程
论文单位 华北电力大学（河北）,点击次数 116,论文页数 55页File Size888k
2004-12-27论文网 http://www.lw23.com/lunwen_867779312/
Circulating Fluidized Bed Boiler; Modeling; Dynamic Characteristic;Decoupling; Fuzzy Control
床温和主汽压是循环流化床锅炉安全、经济运行的两个重要指标。本文利用机理+仿真建模的方法,建立了450t/h 循环流化床锅炉床温和主汽压控制系统的控制模型,计算了在建模过程中需要的一些数据。并对床温和主汽压分别在给煤和一次风量扰动下的动态特性进行了仿真研究,辨识出了床温和主汽压的近似数学表达式。为了更好的实现循环流化床锅炉的自动控制,本文对床温-主汽压系统进行了解耦研究。提出了模糊前馈解耦模糊自适应整定PID 控制方案,对床温-主汽压控制对象进行仿真研究。仿真结果表明:解耦效果理想,基本上实现了相对解耦,且该系统具有良好的抗内扰性和解耦自适应性。
Bed temperature and mainstream pressure are important index of circulating fluidized bed boiler (CFBB) combustion control system. By the idea of mechanism and imitated modeling, mathematical model describing the bed temperature and mainstream pressure control system of 450t/h CFBB is proposed in this thesis. And some data of the need in the course of modeling are calculated. Dynamic characteristic is simulated on the bed temperature and the mainstream pressure of CFBB under the feed coal flow and airflow disturbing. The mathematic expressions on the bed temperature and the mainstream pressure are identificated. For atuocontrol of CFBB become well, decoupling is studied on the bed temperature-mainstream pressure system in this thesis. The fuzzy feed forward decoupling fuzzy self-turning PID control scheme is proposed and used in the imitation of bed temperature and mainstream pressure control. The simulation shows that the result is satisfactory, and this means cashes relative decoupling. And this system has nicer inner-harass and self-turning decoupling character.
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