【正文】 XXXXX大學(xué)畢業(yè)設(shè)計說明書 摘要 隨著社會經(jīng)濟(jì)的飛速發(fā)展 ，城市建設(shè)規(guī)模的不斷擴(kuò)大，以及人們生活水平的不斷提高，對城市生活供暖的用戶數(shù)量和供暖質(zhì)量提出了原來越高的要求。結(jié)合現(xiàn)狀，本論文供暖鍋爐監(jiān)控系統(tǒng)，設(shè)計了一套基于 PLC和變頻調(diào)速技術(shù)的供暖 鍋爐控制系統(tǒng) 。 該控制系統(tǒng)以一 臺工業(yè)控制機(jī)作為上位機(jī)，以西門子 S7300可編程控制機(jī)為下位機(jī)，系統(tǒng)通過變頻器控制電機(jī)的啟動，運(yùn)行和調(diào)速。上位機(jī)監(jiān)控 采用 WinCC設(shè)計，主要完成系統(tǒng)操作界面設(shè)計，實(shí)現(xiàn)系統(tǒng)啟?？刂疲瑓?shù)設(shè)定， 報警聯(lián)動，歷史數(shù)據(jù)查詢等功能。下位機(jī)控制程序采用西門子公司的 STEP7編 程軟件設(shè)計，主要完成模擬量信號的處理，溫度和壓力信號的 PID控制等功能，并接受上位機(jī)的控制指令以完成風(fēng)機(jī)啟?？刂?，參數(shù)設(shè)定，循環(huán)泵 的 控制和其余電動機(jī)的控制。 本文設(shè)計的變頻控制系統(tǒng)實(shí)現(xiàn)了鍋爐燃燒過程的自動控制，系統(tǒng)運(yùn)行穩(wěn)定可靠 。采用鍋爐的計算機(jī)控制和變頻控制不僅可大大節(jié)約能源，促進(jìn)環(huán)保，而且可以提高生產(chǎn)自動化水平，具有顯著的經(jīng)濟(jì)效益和社會效益。 關(guān)鍵字 ： 鍋爐 控制 ； 變頻調(diào)速 ；組態(tài)軟件； PLC 蘭州理工大學(xué)畢業(yè)設(shè)計說明書 1 Abstract Along with social economy‘s swift development, the urban construction scale‘s unceasing expansion , as well as the peple living standard‘s unceasing enhancement , set more and more high request to the city life heating‘s user quantity and the heating quality. The union present situation, the present paper heating boiler supervisory sysem, has designed a set based on PLC and the frequency conversion velocity modulation technology heating boiler control system. This control system takes the superior machine by one Industry cybertrons , west of family household S7300 programmable controller for lower position machine ,system through frequency changer control motor‘s start , movement and vclocity modulation .the superior machine monitoring software uses the three dimensional strength to control the WinCC design , mainly pletes the system operation contract surface design ,realizes the system to open/stops functions and so on control ,parameter hypothesis ,warning linkage,historical data inquiry. The lower position machine control procedure uses Siemen‘s STEP7 programming software design , mainly pletes the simulation quantity signal processing , temperature and pressure signal functions and so on PID control , and receives the superior machine control mand to plete the air blower to open/stops the control , the parameter hypothesis, the circulating pump control and other electric motor‘s control. This article designs the frequency conversion processs automatic control, the systems operation is stable, is reliable. Uses boiler‘s puter control and the frequency converseon control noe only may save the energy greatly, the promotion environmental protection moreover may raise the production automation level, has the remarkable economic efficiency and the social efficiency. Key Words： Boiler control； Frequency conversion velocity modulation ； Configuration Software； PLC 蘭州理工大學(xué)畢業(yè)設(shè)計說明書 2 目 錄 摘要 ................................................................................................................................ 0 Abstract ......................................................................................................................... 1 第 1 章 概 述 .......................................................................................................... 4 項(xiàng)目背景及課題的研究意義 ................................................................................ 4 供暖鍋爐控制的國內(nèi)外研究現(xiàn)狀 ......................................................................... 5 鍋爐控制系統(tǒng)的發(fā)展趨勢 ..................................................................................... 6 本文所做工作 ...................................................................................................... 7 第 2 章 系統(tǒng)方案設(shè)計 .................................................................................................. 9 鍋爐控制研究簡介 ............................................................................................... 9 總體設(shè)計思路 ..................................................................................................... 9 方案比較 ........................................................................................................... 10 方案 1 ...................................................................................................... 10 方案 2 ..................................................................................................... 10 方案論證與方案確定 .......................................................................................... 11 第 3 章 硬件 設(shè)計 ........................................................................................................ 12 用戶系統(tǒng)框圖 ................................................................................................... 12 鍋爐系統(tǒng)的理論分析 ......................................................................................... 13 變頻調(diào)速基本原理 .................................................................................... 13 變頻調(diào)速在供暖鍋爐中的應(yīng)用 .................................................................. 13 變頻調(diào)速節(jié)能分析 .................................................................................... 14 燃燒過程控制 .................................................................................................... 19 鍋爐控制系統(tǒng)設(shè)計 ............................................................................................. 20 控制系統(tǒng)構(gòu)成介紹 ............................................................................................. 21 第 4 章 軟件設(shè)計 ........................................................................................................ 25 S7300 系列 PLC簡 介 ........................................................................................ 26 PLC編程語言簡介 ............................................................................................. 28 PLC編程語言的國際標(biāo)準(zhǔn) ......................................................................... 28 復(fù)合數(shù)據(jù)類型與參數(shù)類型 ......................................................................... 29 系統(tǒng)存儲器 .............................................................................................. 29 S7300 CPU中的寄存器 ............................................................................ 30 STEP7 的原理 ...................................................................