内蒙古科技大学
本科生毕业设计说明书（毕业论文）
题 目：智能控制在除氧器温度自动控
制中的应用
学生姓名：白彩波 学 号：200540503301 专 业：测控技术与仪器 班 级：测控05-3 指导教师：李忠虎 副教授
内蒙古科技大学毕业设计说明书(毕业论文)
智能控制在除氧器温度自动控制中的应用
摘要
除氧器是将溶解在水中的有害气体尤其是水中的溶解氧从水中除去，以免这些有害气体进入锅炉系统造成热力设备腐蚀，从而影响锅炉系统的正常运作，所以除氧器在热力发电厂中起到了很重要的作用。为了保证除氧器能达到很好的除氧效果，就需要采用先进的控制方法，应用自动化控制技术来控制除氧器。本论文以发电厂的除氧器为控制对象，采用PID、模糊控制、模糊PID控制技术设计了除氧器温度控制系统。本论文研究的重点是放在二个方面：第一，设计和实现适用于除氧器温度控制的控制规律及控制算法。具体研究了热力除氧器的特点、结构和运行特性，根据除氧器系统参数的变化特性，设计除氧器温度控制系统；第二，使用MATLAB的模糊工具箱结合SIMULINK对控制系统进行仿真，比较了PID控制、模糊控制及模糊PID控制的仿真结果。本论文工作注重理论与工程实际的结合，并在此研制过程中取得了比较全面的资料和数据，为类似的除氧器温度控制研究打下了良好的基础。
关键词：除氧器；温度控制；PID控制；模糊控制；模糊PID控制
I
内蒙古科技大学毕业设计说明书(毕业论文)
The Study of Temperature Control System of Deaerator Based on IntelligentControl
Abstract
Deaerator plays an important role in thermodynamic power plants since it can remove the harmful gas,especially oxygen,from the water before it enters the boiler and erodes thethermodynamic equipments.In order to accomplish the good effect,people design the autocontrol system of deaerator which based on the advanced control method.According to the circumstances of deaerator of Power Plant .I design the control system based on PID、fuzzy control、Fuzzy-PID Control Multi-modal on this paper. Two points are focused on this paper.Firstly,the temperature control algorithm and control laws of the deaerator system are designed and realized.I study the characteristic,configuration and characteristic of running of deaerator system. A design method of the controller is presented based on the deaerator of Power Plant. Secondly, Simulation of temperature control system is also performed to study the performance of fuzzy control by MATLAB, simulation result of fuzzy controller compare to PID controller and Fuzzy-PID Control. The research work is closely connected to the practical application,during the research,I have got the general data and information which can be used by the study of other deaerator.
Key words：Deaerator ; Temperature Control; PID Control ; Fuzzy Control; Fuzzy-PID Control
II
内蒙古科技大学毕业设计说明书(毕业论文)
目 录
摘要 ...................................................................................................................................... I Abstract .............................................................................................................................. II 第一章 引言 ....................................................................................................................... 1
1.1锅炉除氧概述 ........................................................................................................ 1 1.2 除氧器控制系统的研究现状 ............................................................................... 1
1.2.1 国外状况 ..................................................................................................... 1 1.2 .2国内状况 ..................................................................................................... 2 1.3 本课题的来源及任务 ........................................................................................... 3 第二章 热力除氧器及其温度控制系统结构与原理 ....................................................... 4
2.1 除氧器介绍 ........................................................................................................... 4
2.1.1除氧器的结构 .............................................................................................. 5 2.1.2除氧器的工作原理 ...................................................................................... 5 2.1.3 除氧器的分类 ............................................................................................. 6 2.2 热力除氧系统介绍 ............................................................................................... 7
2.2.1 水中气体的溶解特性 ................................................................................. 7 2.2.2 除氧的根本途径 ......................................................................................... 8 2.2.3 热力除氧的特点 ......................................................................................... 8 2.3 热力除氧器实验建模 ........................................................................................... 8 2.4 热力除氧器温度控制方案设计 ......................................................................... 10
2.4.1 系统设计思路 ........................................................................................... 10 2.4.2 控制方案的确立 ....................................................................................... 10
第三章 PID控制系统设计.............................................................................................. 12
3.1 引言 .................................................................................................................... 12 3.2 PID控制的原理和特点 ................................................................................... 12 3.3 控制器的构成 ..................................................................................................... 13 第四章 模糊控制系统设计 ............................................................................................. 14
4.1模糊控制理论概述 .............................................................................................. 14
4.1.1 引言 ........................................................................................................... 14 4.1.2模糊控制特点 ............................................................................................ 15
III
