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毕 业 论 文（设 计） 题目：
超超临界火电机组燃烧控制系统设计
姓 名 林逸君 学 号201100170220 学 院 控制科学与工程学院 专 业 测控技术与仪器 年 级 2011级 指导教师刘红波
2015年 5 月 10 日
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目录
摘要 ..................................................... 3 ABSTRACT .............................................. 4 第一章 绪论 .............................................. 5
1.1课题背景及意义 .......................................................................................................... 5
1.2 超超临界火电机组控制技术应用现状......................................................... 5 1.3 毕业设计主要内容......................................................................................... 5
第二章 超超临界火电机组燃烧控制系统概述 .................. 6
2.1 机组工艺流程简述......................................................................................... 6
2.2 机组燃烧过程控制系统任务......................................................................... 7 2.3 机组燃烧过程控制系统组成与特点............................................................. 8
第三章 超超临界火电机组燃烧控制方案设计 .................. 9
3.1常规控制方案.................................................................................................. 9
3.2改进控制方案................................................................................................ 10
第四章 控制方案仿真验证 ................................. 10
4.1 MATLAB简介................................................................................................ 11
4.2 控制方案的Simulink仿真验证............................... 错误！未定义书签。
结论 .................................................... 15 致谢 .................................................... 16 参考文献 ................................................ 17 附录
附录1 Controller design for a 1000 MWultra super critical once-through boiler
power plant
附录2 文献翻译
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摘 要
随着科学技术的进步，传统电厂的工作方式正在发生着革新，超超临界电厂得到了越来越广泛的应用。相比于传统电厂，超超临界电厂主要区别在于提高了锅炉内的工质，一般为水的压力，来提高电厂的发电效率。本文通过对电厂燃烧过程控制系统的改进来减少电厂控制变量之间的相互干扰，从而进一步提高电厂的发电效率。首先，根据电厂的工作原理分析出电厂各控制变量与各被控量之间的相互关系，建立电厂的简化数学模型。之后，根据各变量之间的相互作用关系采取PID增益控制、解耦等方式提出改进的控制方案。然后，根据从网上搜集到的超超临界电厂在实际工况下所采集到的数据完成数学模型的数据输入工作。最后，通过MATLAB下的Simulink工具箱对数学模型进行仿真实验，得出电厂输出量的波形图，通过对比研究改进后的控制方案的实际运行成果。
关键词：超超临界电厂, 燃烧过程控制系统, 数学模型, MATLAB, Simulink仿真
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ABSTRACT
With the progress of science and technology, an innovation of traditional power plants is proceeding, ultra supercritical power plants are being applied more and more general. Compared to traditional power plants, ultra supercritical power plants raise the pressure of the working medium, usually water, in their boilers to improve their generating efficiency. This thesis focuses on the way to improve the combustion process control system of the power plant to reduce the interferences during each of the power plant control variables. So that we can further improve the generating efficiency of our power plant. First of all, according to the working principle of the power plant we analysis how its control variables and controlled variables affect each other, so we can build a mathematical model of them. Secondly, by using PID controllers, decoupling or other ways we set up an improved combustion process control system control plan. Then, by searching the Internet we find some data from a real ultra supercritical power plants in order to input them into our mathematical
model. Last of all, through Simulink, a toolbox from MATLAB we make a simulation for our model, after we have a conclusion in the oscilloscopes we can find out how our plan improves the efficiency of the power plant.
Key words: ultra supercritical power plant, combustion process control system, mathematical model, MATLAB, Simulink simulation
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