西门子现场总线在电厂输煤控制系统的应用

攀枝花学院本科毕业设计（论文）摘要I摘要PROFIBUS现场总线技术是随着数字信号系统的发展而产生的,它是世界上第一个开放式现场总线标准，其应用领域覆盖了从机械加工、过程控制、电力、交通到楼宇自动化的各个领域。PROFIBUS-DP是一种经过优化的模块，有比较高的数据传输率，适用于系统和外部设备之间的通信，远程I/O系统尤为适合。它允许高速度周期性的小批量数据通信，适用于对时间要求比较高的自动化场合。本设计是应用西门子现场总线对电厂输煤系统的改造，电厂输煤系统是火电厂电力生产的重要生产过程。火力发电厂输煤系统的工艺设备布置具有高度分散性，锅炉的单炉单磨燃煤的计量准确问题一直是影响电厂发电成本正平衡统计的顽症，更是燃煤发热量和锅炉燃烧效率统计计算尚无法解决的棘手问题。而现场总线技术对于高度分散性、电磁干扰大的设备有其独特的优势，因而输煤系统可以采用将DCS远程I/0总线模式与智能通讯模块总线模式相结合的控制方式，技术先进，提高了输煤系统控制水平。本设计分两步对该项目进行改造，先期进行输煤控制系统的改造，而后进行输煤和入炉煤软测量的改造．以期最终达到单炉瞬时燃料计量及动态生产成本核算的目的。关键词输煤系统，PCS，PROFIBUS-DP攀枝花学院本科毕业设计（论文)ABSTRACTIIABSTRACTPROFIBUSfieldbustechnologyiswiththedevelopmentofthedigitalsignalsystem,itistheworld'sfirstopenfieldbusstandard,itsapplicationfieldcoversfrommechanicalprocessing,processcontrol,electricpower,traffictobuildingautomationfields.PROFIBUS-DPisanoptimizedmodule,havehigherdatatransferrate,appliedtothecommunicationbetweensystemandexternalequipment,especiallysuitablefortheremoteI/Osystem.Itallowshighspeedperiodicsmallbatchdatacommunication,suitableforhighautomationdemandsontime.ThisdesignistheapplicationofSiemensfieldbusinpowerplantcoalconveyingsystem,powerplantcoalconveyingsystemistheimportantprocessoftheelectricpowerproductioninpowerplants.Thermalpowerplantcoalconveyingsystemofprocessequipmentlayoutishighlydecentralized,singlefurnaceboilerproblemofaccuratemeasurementofsinglegrindingofcoalhasbeenaffectthecostofpowergenerationisequilibriumstatisticalproblems,especiallycoalcalorificvalueandstatisticalcalculationofboilercombustionefficiencyisstillunabletosolveintractableproblems.Andfieldbustechnologyforhighlydecentralized,electromagneticinterference,bigequipmenthasitsuniqueadvantages,thusconveyingsystemcanbeusedwiththeDCSremoteI/0busmodeofintelligentcommunicationmodulebuspatternwiththecombinationofcontrolmode,advancedtechnology,improvethelevelofthecoalconveyingcontrolsystem.Thisdesignfortheprojectintwosteps,firstcoalconveyingcontrolsystemrenovation,andthenthesoftmeasurementofthecoalandcoalintothefurnace.Inordertoultimatelyachieveinstantaneoussinglefurnacefuelmeteringanddynamicproductioncostaccountingpurpose.KeywordsCoalhandlingsystem,PCS,Profibus-DP攀枝花学院本科毕业设计（论文）目录1目录摘要.............................................................................................................................IABSTRACT................................................................................................................II1绪论.........................................................................................................................22输煤段工艺及控制要求.........................................................................................32.1输煤系统的组成................................................................................................32.2输煤段工艺简介................................................................................................32.3输煤控制方案...................................................................................................42.3.1输煤系统的特点................................................42.3.2控制方案描述..................................................53Profibus-DP协议..................................................................................................63.1Profibus-DP的基本功能..................................................................................63.2Profibus-DP的通信原理..................................................................................83.3电子设备数据文件(GSD)...................................................................................83.4Profibus-DP的技术优势..................................................................................94系统的网络结构...................................................................................................104.1SIMATICPCS7系统概述.................................................................................104.2SIMASTICPCS7结构图..................................................................................105系统硬件及功能配置.........................................................................................125.1系统硬件.........................................................................................................125.1.1模块的选择..........................................................................................125.1.2程序设计.............................................................................................135.2硬件组态.........................................................................................................145.2.1通讯设置.............................................................................................165.3S7-300与S7-200的EM277之间的Profibus-DP通讯......................................186上位机监控软件的研究与设计...........................................................................246.1WINCC组态软件的功能和特点..........................................................................246.2利用组态软件WinCC设计系统监控界面...........................................................24结论........................................................................................................................