基于组态软件和PLC的火电厂给煤控制系统设计样本.doc

摘 要

PLC 是 80 年代发展起来一种新型电器控制装置，它诞生给工业控制带来了一次革命

性飞越。它将老式继电器控制技术和计算机控制技术融为一体，具备灵活通用、可靠性高、

抗干扰能力强、编程简朴、使用以便、功能强大、易于实现机电一体化等明显长处，已经

广泛应用于工业生产各种自动控制过程中。

电厂输煤系统是电力生产过程中非常重要外围辅机系统，输煤控制系统具备控制设备

多、工艺流程复杂、设备分散等特点，沿线环境条件恶劣，粉尘、潮湿、振动、噪音、电

磁干扰等都比较严重，老式强电集中控制方式已不能适应大型火电厂输煤系统自动化规定，

PLC 程控方式由于其自身长处，当前在国内大型火电厂输煤系统中已逐渐取代常规强电集

一种强有力工具，并以工业电视为辅助手段对现场设备运营状态进行视频监控、代替老式

现场巡检，保证了输煤系统安全、可靠、高效和经济生产运营。

核心词 火电厂，紫金桥，给煤控制，可编程控制器

Abstract

PLC is the 80's developed a new type of electrical control devices，which brought about the

birth of the industrial control over a revolutionary. It will relay the traditional control technology

and computer control technology together with a flexible general-purpose，high reliability and

strong anti-interference ability ， programming is simple ， easy-to-use ， powerful and easy to

implement，such as mechanical and electrical integration of significant advantages，has been

widely used in a variety of automatic control of industrial production process.

systems have gradually replaced conventional strong centralized control of power the way to

become large-scale coal thermal power plant control system.

Coal-fired boiler transmission is an important part ， how to ensure the reliability of

equipment and reduce operator and maintenance personnel working strength，enhance economic

efficiency，as a subject worthy of study. Programmable Logic Controller (PLC) is very fast in

recent years，with wide application to the microprocessor as the core，set computer technology，

automation technology ， communication technology in one of the common industrial control

devices. It has a full-featured，easy to use，easy maintenance，high universality，high reliability and

high cost performance has been in various areas of industrial control has been a wide range of

applications ， industrial automation has become a powerful tool and television industry as a

Abstract..........................................................................................................................II

1 引 言..........................................................................................................................1

1.1 火电厂输煤系统..................................................................................................1

1.2 输煤程控简介......................................................................................................1

1.3 输煤程控系统控制方式及其功能特点..............................................................3

1.4 输煤控制系统概况及工艺规定..........................................................................4

1.5 输煤顺序控制系统国内外发展趋势..................................................................4

1.6 本次设计重要目..................................................................................................5

2 可编程控制器简介....................................................................................................6

2.1 可编程控制器定义..............................................................................................6

2.2 PLC 特点...............................................................................................................6

2.3 PLC 应用领域.......................................................................................................6

2.5 PLC 工作原理.......................................................................................................7

3.3.1 监控画面设计与功能开发..........................................................................12

3.3.2 监控画面数据动态联接..............................................................................17

4 PLC 梯形图程序设计...............................................................................................19

4.1 编程软件简介....................................................................................................19

4.2 梯形图程序设计................................................................................................20

结 论............................................................................................................................22

致 谢............................................................................................................................23

参照文献......................................................................................................................24

附 录............................................................................................................................25

1 引 言

1.1 火电厂输煤系统

防系统等。

输煤系统是火力发电厂中较为庞大公用系统。随着国内电力工业迅速发展，火电厂装

机容量和单机容量都日益增大，输煤系统规模也大幅度上升，对其控制方式、运营水平规

定也越来越高。输煤程控系统重要是以 PLC 主，实现输煤系统自动化控制。与强电集中控

制相比，该系统在技术上具备控制功能强，编程简朴，实现工艺联锁以便，可省去大量硬

接线，维护以便，可在线修改等特点。PLC 不但能完毕复杂继电器控制逻辑，并且也能实

现模仿量控制及智能控制；能实现远程通讯、联网及上位机监控等。可为全厂实现计算机

控制和管理创造条件。对地区分布较广系统还可以增长远程控制站及闭路电视监视系统。

1.2 输煤程控简介

煤是火力发电厂一次能源，为使机组正常运营，需要保证原煤可靠输送，因而输煤系