Meaning
Thedatacollectionsystemincludes:visualreportdefinition,auditrelationshipdefinition,reportapprovalandrelease,datafilling,datapreprocessing,datareview,comprehensivequerystatistics,etc.functionalmodule.Throughthenetworkinganddigitizationofinformationcollection,thecoverageofdatacollectionwillbeexpanded,andthecomprehensiveness,timelinessandaccuracyoftheauditworkwillbeimproved;finally,themodernizationofrelatedbusinessworkmanagement,standardizationofprocedures,scientificdecision-making,andnetworkingofserviceswillberealized.
Introduction
Introductiontothecurrentsituation
mycountry'ssmallandmediumcapacityunits(200MWandbelow)accountforaconsiderableproportionofthermalpowerplants,andthemonitoringmodeoftheseunitsissimulationThecontrolsystemisadataacquisitionsystembasedonconventionalinstruments.Thiskindofmonitoringmodehasdisadvantagessuchasheavymaintenanceworkloadandnoreliablehistoricalrecords.Inaddition,conventionalanaloginstrumentshavealsoenteredaperiodofagingandelimination,thereliabilityoftheequipmenthasbeensignificantlyreduced,andthesparepartsofsomeinstrumentscannotbeguaranteed.Therefore,thetechnicaltransformationofthemonitoringsystemofsmallandmedium-sizedunitsisimperative.Combiningmycountry’snationalconditionsanddrawinglessonsfromdomesticsimilarsystemdevelopmentexperience,asetofeconomicalandpracticalFDC-Ⅱdistributedpowerplantoperationreal-timedatamonitoringsystemhasbeendeveloped,whichcanbeusedfortechnicaltransformationofsmallandmedium-sizedunits,aswellassubstations,powersupplybureaus,etc.Electricityproductionandmanagementdepartments.Thesystemhasbeenputintoactualoperationina150MWthermalpowerplantinShandongProvince.
Functionintroduction
Thequalityofdomesticthermalcontroldevicesandthecontrollabilityofmainandauxiliaryunitsarenotsatisfactory,andtherearesomeproblemsindesign,installation,commissioning,andoperationlevel.Inviewofthissituation,theFDC-Ⅱdistributedpowerplantoperationreal-timedatamonitoringsystemisdesigned.Itisacomputermonitoringsystemwithonlymonitoringfunctionsbutnocontrolfunctions,thatis,adataacquisitionsystem-DAS.
Thepowerplantoperatingdatathatthissystemcancollectincludeselectricalparametersandnon-electricalparameters.Amongthem,electricalparametersmainlyincludeanalogquantitiessuchascurrent,voltage,power,andfrequency,switchquantitiessuchascircuitbreakerstatus,isolatingswitchposition,relayprotectionactionsignals,andpulsequantitiesthatrepresentelectricaldegrees.Therearemanytypesofnon-electricalparameters.Itcancollectvarioustemperature,pressure,flowandotherthermalsignalsintheoperationofthermalpowerplants,aswellaswaterlevel,flowrate,flowandotherhydraulicsignalsinhydropowerplants,andcanalsocollectOthersignalssuchasthestateoftheinsulatingmediumandthemeteorologicalenvironment.
ThesystemalsoincludesbackgroundprocessingsoftwaredevelopedwithVisualC++,whichmainlyincludesfunctionssuchasdataprocessing,databasemanagement,real-timemonitoring,exceptionhandling,statisticalcalculationandreporting,performanceanalysisandoperationguidance.
Systemtype
Equipmenttype
referstotheprocessofautomaticallycollectinginformationfromanaloganddigitalunitsundertestsuchassensorsandotherequipmentundertest.Thedataacquisitionsystemisacombinationofcomputer-basedmeasurementsoftwareandhardwareproductstorealizeaflexible,user-definedmeasurementsystem.Forexample,barcodemachines,scanners,etc.arealldatacollectiontools(systems).
Networkclass
Akindofinformationtoolusedtocollectthecontentsofwebpages,forums,etc.directlyinthedatabaseorpublishtothenetwork.Theoriginalwebpagecanbeautomaticallycollectedaccordingtotherulessetbytheuser,thecontentneededintheformatwebpagecanbeobtained,andthedatacanalsobeprocessed.
Systembackground
Formostmanufacturingenterprises,theautomaticdatacollectionofmeasuringinstrumentshasalwaysbeenanannoyingthing.EveniftheinstrumentalreadyhasRS232/485interfaces,itisstillUsingthemethodofmeasuringwhilemanuallyrecordingtopaper,andfinallyinputtingittothePCforprocessing,notonlyisheavywork,butalsocannotguaranteetheaccuracyofthedata.Oftenthedataobtainedbythemanagerisalreadyoneortwodaysbehindthedata;Foron-sitebadproductinformationandrelatedoutputdata,howtoachievehigh-efficiency,concise,andreal-timedatacollectionisevenmoredifficult.
Mainfeatures
Thesystemhasthefollowingfeatures:
a.Thedatacollectionismoreversatile.Notonlycancollectelectricalquantities,butalsonon-electricalquantities.TheelectricalparametersarecollectedbyACdiscretesampling,andthenon-electricparametersarecollectedbyrelaysurvey.Thesignalprocessingisadjustedbythehigh-precisionisolationoperationalamplifierAD202JY,whichhasgoodlinearityandhighprecision.
b.Theentiresystemadoptsadistributedstructure,andbothsoftwareandhardwareadoptamodulardesign.Thedataacquisitionpartadoptstheself-developedRS-485networkwithopticalisolation,whichhashighcommunicationefficiency,goodsafetyandsimplestructure.Thebackgroundsystemcanformdistributednetworkssuchas485network,NovellnetworkandWindowsNTnetworkaccordingtotheactualsizeandrequirementsofthemonitoredsystem.Becausethesoftwareandhardwarearedistributedandmodularized,itiseasytoupgradeandmaintainthesystemandformdifferentsystemsaccordingtoneeds.
c.DataprocessingadoptsVisualC++languageprogrammingonWindowsNTplatform,whichhasstrongprocessingability,fastspeed,friendlyinterface,andcanrealizenetworkdatasharing.
d.Theentiresystemisself-developed,inlinewithmycountry'snationalconditions.Thechangestotheoriginalsystemofthepowerplantaresmall,andthesystemcostisrelativelylow,whichismoresuitableforthetechnicaltransformationneedsofsmallandmedium-sizedpowerplants.
Mainfunctions
·Real-timecollectionofoutputdatafromtheproductionlineorthenumberofdefectiveproducts,orthetypeoffailureoftheproductionline(suchaslinestoppage,lackofmaterial,quality),andtransmissionTothedatabasesystem;
·Receiveinformationfromthedatabase:suchasproductionplaninformation,materialinformation,etc.;
·Transferthenameandquantityinformationofdefectiveproductsattheinspectionstation;
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·Connectthedetectioninstrumenttorealizethedigitizationofthedetectioninstrument.Thedataacquisitioninstrumentautomaticallyobtainsthemeasurementdatafromthemeasurementinstrument,records,analyzesandcalculates,formsthecorrespondingvariousgraphics,andautomaticallyjudgesthemeasurementresults,suchasinthemechanicalRunoutmeasurementofprocessedparts,drawingoftensileforcecurveoftensionmeter,etc.;
Mainequipment
·EquippedwithRS232andRS485serialports,multipletestinginstrumentscanbeconnectedtorealizeautomaticdatacollection;
·EquippedwithaUSBinterface,convenientfordataoutput;
·EquippedwithRJ45interface,canbeconnectedtothenetworkthroughanetworkcable;
·EquippedwithVGAvideooutputandaudiooutputInterface;
·Built-inWIFImodule,whichcanbeconnectedwirelesslytofacilitateon-sitenetworking;
·Maximumsupportfor32Gdatastoragespace;
·Equipment4.3-inchtouchscreen,easytooperate;
·UserscanobtaindatafromanyPCinthenetworkthroughtheinterface,whichisconvenientforsecondarydevelopment;
·Equippedwith4.3-inchtouchscreen,easytooperate;
·Removablemeasurement,real-timedatatransmission,alsocanuploaddatathroughthenetworkafterthetestiscompleted;
·Thecontinuousworkingtimeofthepowersupplyis6hours,andthestandbytimeisupto10days;
Productionsitedatacollectionisaveryimportantlinkinthequalityprocess.Agooddatacollectionplancanfreequalitymanagementpersonnelfromtheheavyworkofprocessingdataandhavemoretimetosolvetheactualproblem.Atthesametime,real-timedatacollectionalsoenablesthesystemtotrulyrealizereal-timemonitoring,findproblemsasearlyaspossible,andavoidgreaterlosses.