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1、内蒙古科技大学硕士学位论文installedatthesametime,onlyamodestchangesintheexternalhardwareconnection,youcanchangethewaypreparethecastwork,improvetheportabilityoftheequipment.(2)Thenetworkstructureandnetworkconfigurationofthesystem.Thismonitoringsystemismainlycomposedoftheremotemonitoringstations,GPRSwirelesscommu
2、nicationnetwork,thelocalmonitor,thesceneofequipmentandterminalstation.Systemaccordingtothefunctionofeachcomponentisdifferent,differenthardwareandsoftwareconfiguration.(3)Thesystemhardwareandsoftwareimplementation.Pitheadheap-leachinginordertosavethedesigncost,attheendofeachtwotransformersecondarysi
3、deoftransformersubstationareinstalledbythedetectioncircuitofvoltagetransformerandthevoltagerelay,voltagestateoftwowaypowerdetection,collectedthroughthenativeintegratedI/OportofPLC.ThreeintelligentcircuitbreakerthroughModbusnetworkuploadit,brakestatesignalstoPLC;Installedonthetwolowvoltagebusintelli
4、gentelectricenergymeterrespectivelythroughtheModbusnetworkuploadtheirdistributionparametersonthebustoPLC,includingvoltage,current,activepower,reactivepowerandpowerfactor.S7-200PLCthroughthesedatatodeterminepowersupplyisnormalornot,andthenthroughtheModbusnetworksignalcontrolofintelligentcircuitbreak
5、eron-off.PLCbyEM277throughprofibus-dpnetwork,real-timedataexchangetolocalmonitoranddisplayedinthelocalPCWinCCmonitorscreen.Atthesametime,throughwirelesscommunicationmoduleofPLCMD720-3passthedatatoGPRSpublicnetwork,andthendisplayedontheremotemonitoringPCWinCC.ThismonitoringsystembyS7-200PLCasthecont
6、roller,thepowersupplysystemcanworkindarkstandbymodecanalsoworkinstandbymode,thelocalmonitorandmonitoringandremotemonitor,monitoreachpitheadpowersupplysubstationreal-timedistributionparameters,thecircuitbreakerworkingstatus,faultalarmrecord,etc.,andchoosetomanually,sincethevotefromthecomplexorcouldn
7、'tsincethecompoundmode.Itguaranteesthecontinuityandstabilityofthepowersupplyofaneffectivemonitoringsystemfortheenterprise.Keywords：theswitchdevice；Powerquality；S7-200PLC；GPRSIV内蒙古科技大学硕士学位论文目录摘要.............
