基于组态软件和PLC的火电厂给煤控制系统设计

基于组态软件和PLC的火电厂给煤控制系统设计I摘要PLC是80年代发展起来的一种新型的电器控制装置，它的诞生给工业控制带来了一次革命性的飞越。它将传统的继电器控制技术和计算机控制技术融为一体，具有灵活通用、可靠性高、抗干扰能力强、编程简单、使用方便、功能强大、易于实现机电一体化等显著优点，已经广泛应用于工业生产的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的外围辅机系统，输煤控制系统具有控制设备多、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，传统的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的要求，PLC程控方式由于其自身优点，目前在国内大型火电厂输煤系统中已逐渐取代常规的强电集中控制方式，成为大型火电厂输煤程控系统的核心。燃煤输送是锅炉运行的一个重要环节，如何保证设备运行的可靠性、减少操作人员与维护人员劳动强度、提高经济效益，成为一个值得研究的课题。可编程控制器（PLC）是近年来发展极为迅速，应用面极广，以微处理器为核心，集微机技术、自动化技术、通信技术于一体的通用工业控制装置。它具有功能齐全、使用方便、维护容易、通用性强、可靠性高、性能价格比高等优点，已在工业控制的各个领域得到了极为广泛的应用，成为实现工业自动化的一种强有力工具，并以工业电视为辅助手段对现场设备的运行状态进行视频监控、替代传统的现场巡检，确保了输煤系统安全、可靠、高效和经济的生产运行。关键词火电厂，紫金桥，给煤控制，可编程控制器毕业设计（论文）IIAbstractPLCisthe80'sdevelopedanewtypeofelectricalcontroldevices,whichbroughtaboutthebirthoftheindustrialcontroloverarevolutionary.Itwillrelaythetraditionalcontroltechnologyandcomputercontroltechnologytogetherwithaflexiblegeneral-purpose,highreliabilityandstronganti-interferenceability,programmingissimple,easy-to-use,powerfulandeasytoimplement,suchasmechanicalandelectricalintegrationofsignificantadvantages,hasbeenwidelyusedinavarietyofautomaticcontrolofindustrialproductionprocess.Coalpowerplantelectricityproductionsystemisveryimportanttotheprocessoftheexternalauxiliarysystem,coalconveyingcontrolsystemwithcontrolequipmentandmorecomplexprocesses,equipmentandotherfeaturesdistributedalongenvironmentalconditions,dust,humidity,vibration,noise,electromagneticinterferencearemoreserious,traditionalwayofstrongcentralizedcontrolofpowercannotmeetthelarge-scalecoalpowerplantautomationsystem,PLCcontrolledmannerbecauseofitsadvantagesinlarge-scalecoalpowerplantsystemshavegraduallyreplacedconventionalstrongcentralizedcontrolofpowerthewaytobecomelarge-scalecoalthermalpowerplantcontrolsystem.Coal-firedboilertransmissionisanimportantpart,howtoensurethereliabilityofequipmentandreduceoperatorandmaintenancepersonnelworkingstrength,enhanceeconomicefficiency,asasubjectworthyofstudy.ProgrammableLogicController(PLC)isveryfastinrecentyears,withwideapplicationtothemicroprocessorasthecore,setcomputertechnology,automationtechnology,communicationtechnologyinoneofthecommonindustrialcontroldevices.Ithasafull-featured,easytouse,easymaintenance,highuniversality,highreliabilityandhighcostperformancehasbeeninvariousareasofindustrialcontrolhasbeenawiderangeofapplications,industrialautomationhasbecomeapowerfultoolandtelevisionindustryasameansofsupportingtheoperationofequipmenton-sitevideosurveillancestate,toreplacethetraditionalon-siteinspectiontoensurethatthecoalhandlingsystemissafe,reliable,efficientandeconomicoperationoftheproduction.KeywordsPowerPlant,Real,SupplyingCoalControl,ProgrammableLogicController.基于组态软件和PLC的火电厂给煤控制系统设计III目录摘要..............................................................................................................................IAbstract..........................................................................................................................II1引言.........................................................................................................................11.1火电厂输煤系统.................................................................................................11.2输煤程控简介.....................................................................................................11.3输煤程控系统控制方式及其功能特点.............................................................31.4输煤控制系统概况及工艺要求.........................................................................41.5输煤顺序控制系统国内外发展趋势.................................................................41.6本次设计的主要目的.........................................................................................52可编程控制器简介...................................................................................................62.1可编程控制器的定义.........................................................................................62.2PLC的特点..........................................................................................................62.3PLC的应用领域..................................................................................................62.4PLC的工作模式..................................................................................................72.5PLC的工作原理..................................................................................................72.6叶轮给煤机上位机与PLC通讯.........................................................................83叶轮给煤机系统监控画面设计...............................................................................93.1监控软件的功能及基本使用方法.....................................................................93.2控制系统硬件设计...........................................................................................103.2.1叶轮给煤机控制系统工况分析................................................................103.2.2叶轮给煤机控制系统构成及功能说明....................................................103.3监控软件设计....................................................................................................123.3.1监控画面设计与功能开发....................................