摘要集散控制系统DCS，已经应用在火电厂的控制之中。锅炉是火力发电厂的主要设备，并且是典型的复杂热工系统，它的许多变量都相互关联，其中锅炉汽包液位控制是锅炉控制的一个难点。水流中的温度和压力波动频繁并且很快，控制锅炉的液位是比较困难的。我在本课题中使用PID调节器控制调节锅炉的液位。64223

本文着重分析了DCS系统的软件应用和硬件结构。在调试过程中，充分利用了DCS组态软件的优势，不断优化控制逻辑与方案，达到了理想的控制效果。

在毕业设计中，我使用的是浙大中控ECS-100集散控制系统。通过这个系统，我对小型火电厂测控系统的温度和液位以及流量回路进行监控。学习掌握电磁阀、压力式液位传感器、Pt100热电阻和电磁流量计的工作原理，并学习如何使用浙大中控的组态软件Advantrol-pro 2.5。

毕业论文关键词  锅炉液位、PID控制、ECS-100集散控制系统、Advantrol-pro 2.5

毕业设计说明书（论文）外文摘要

Title   Monitoring and control system design based on the ECS-100 in the small thermal power plants.       

Abstract

The distributed control system(DCS) has been used in the automatic control 

of power plants.Boiler is the most important equipment in the power plant and a typical complex thermal system with many variables interconnected,in which the drum water control is a difficulty.The fluctuation of temperature and pressure in flow changes frequently and quickly.So it is difficult to control boiler water level.In this paper I use the  PID control for

Controlling water level.

This paper analyzes the software applications  and hardware structure of DCS system in particular.In the process of debugging,I make full use of the advantage of DCS configuration software to optimize the control logic and program constantly and have achieved the ideal control effect.

In the design,I use the ECS-100 distributed control system of the SUPCON.

By this system,I monitor and control temperature ,liquid level and flow loop of small thermal power plant monitoring and control system.Learning and mastering the principle of solenoid valve,pressure type liquid level sensor,the Pt100 thermal resistance and electromagnetic flowmeter as well as the use of SUPCON configuration software Advantrol-pro 2.5.

Keywords :  Boiler level,PID,ECS-100 distributed control system,Advantrol-pro 2.5

1绪论 6

1.1 课题背景 6

1.2 课题研究的现实意义 6

1.3 国内外研究概况 7

1.4 本课题研究的问题及拟采用的研究手段 8

1.5 本章小结 8

2系统设备 9

2.1 AE2000过程控制实验装置 9

2.1.1 AE2000实验对象组成结构 9

2.1.2 AE2000实验对象检测及执行装置 10

2.2  WebField ECS-100控制系统 11

2.2.1 ECS-100系统功能构成 13

2.2.2 ECS-100系统硬件 13

2.3 本章小结 24

3 PID控制器的设计 25

3.1 PID控制原理 25

3.2 控制算法模块 27

3.3 本章小结 31

4系统调试结果