电力电缆设计计算软件的开发

上海交通大学硕士学位论文电力电缆设计计算软件的开发姓名：王苏梅申请学位级别：硕士专业：控制工程指导教师：李建勋;张筱云20050928IVisualBasic6.0IIVisualBasic6.0VisualBasic6.0ABSTRACTIIITHECALCULATIONSOFTWAREDEVELOPINGOFELECTRICPOWERCABLEABSTRACTThetransportperformanceofelectricpowercableisunderthecontrolofitselectricparameters,whichisunderthecontrolofeachmaterialpropertysuchasresistancerate,dielectricconstant,magneticcoefficientandsoon,anditsgeometrysize.Forinstance,voltage-regulatingratedependsontheresistanceandinductanceofconductors.Inmanyinstances,thetransportcapabilityofelectricpowercableisaffectedbytheheatwastageofeachpartofcable,permittedmaximumtemperatureriseandheatresistanceofinsulatingmaterials.Astotheheatwastageofeverypartofcable,itisrestontheelectricparameters.WecansummarizethatcalculatingtheelectricparametersandanalyzingtheFunctionrelationshipbetweenperformanceandconstructionofinsulatingmaterialssoastochoosetherightconstructionofelectricpowercableisandimportantandabsolutelynecessarilytaskinthefieldofelectricpowercabledesign.Toshortenthedevelopingperiod,makemoredesignaccurate,cutdowndesigningandproducingcostsandreachtherequestswithaneconomicdesigndecision,itisessentialtoaccomplishthedesignofelectricpowercableusingcomputer.Buttherearemanydifferencesinproductsandmanufacturetechniquebetweeneachmanufacturer;wecan’taccomplishsomespecialtaskusinggeneralsoftware.It’snecessaryforustodevelopspecialsoftwarebasedoneveryenterprise’scircumstance.Therefore,wehavedevelopedefficientandpracticalsoftwareforelectricpowercablewithvisualbasic6.0languagetomeetmodernenterprisesneeds.Inthispaper,weintroducedconstruction,materialpropertiesandthestructuraldesignoffourpartsofelectricpowercable,namelyconductor,insulation,shieldandjacket.ThetypeofcablestructureandthecalculationofABSTRACTIVelectricalparametershavebeensummarizedindetail.Andthecompletecalculationofcableelectricalparametershasbeengotbyourstudy.Westudiedtheoryofheatflowfiled,equationofheatflowfieldandsteadyexothermiccharacteristicsystematically,suchascontinuouscurrentratingofcableunderstabilitystatusandshort-termcurrentrating.AnoptimizedwaytothecalculationofElectricPowerCablehasbeenputforward.That’stosay,withoutcomplicatedtechniques,howtomakethematerialcoststhelowestundertherequiredconditions.Andthedetailedprogramflowchartsofoptimizeddesignhavebeenoffered.Howtousevisualbasic6.0languagetodevelopingahigheffectiveandpracticalcalculationsoftwareforelectricpowercableisnarratedinthepaper.Thefunctionofeverymoduleandthemethodofthetechnologymanipulationintheapplicationsoftwarearedescribedindetail.Thissoftwareisbasedonthepracticalneeds.Accordingtothedesigningpurpose,onecalculationwillbedividedintoseveralsteps,whichcanbeselectedfromamenu.Everystepiscomposedofsomesimplemodelssothatadesignercancompletehisjobwithveryeasyoperation.Hence,simplestructureandspecificfunctionsareitsadvantagesmoreoveritiscomprehensiveandeasytomaintainandexpand.Itisaneffectiveandpracticaltool,especiallyfordevelopingelectricpowercable,techniqueinspectionandpreventivetest.Anditcanbewidelyappliedbythoseprofessionalelectricpowercableproducers.Keywords:ElectricPowerCableElectricalParameterCalculationVisualBasic6.0languageModel11.1VisualBasicAccess/[1]VB21.2DOSFORTRANWindows9X/2000VisualC++VertexCableCAD()VertexSystemsOyVERTEXSystemsOyClaymontPtyLtdCableCalculationsVBExcelCableSolversoftwareTensionMemberTechnology16VertexSystemsOy1.3VisualBasicMicrosoftVisualBasicMicrosoftWindowsMicrosoftWindowsVisualBasicVisual(GUI)Basic3VisualBasicBASICWindowsGUIVisualBasicWindowsVisualBasicVisualBasicVisualBasicVBAVisualBasicScriptingEdition(VBScript)VisualBasicVisualBasicInternetVisualBasiczMicrosoftSQLServerzActiveXMicrosoftWordMicrosoftExcelWindowszInternetintranetInternetzWindowsCDsetup.exe1.4DOSBasicCVisualBasic6.0WindowsVisualBasicVBVBActiveXMicrosoftWordMicrosoftExcelWindowsVisualBasic6.04,VBVB52.1[2]zzz2.22.2.16[2]GB12706(mm2)[31]2-1Table2-1NominalCross-sectionalAreaofConductor1.52.54610162535507095120150185240300400500,63080010002.2.2zztgzzzz72.2.32-12-2[4]2-12-2Fig2-1Non-radialTypeFig2-2RadialType82.32.3.11kV10kV1kV2-33kV10kV2-42-31kVFig2-31kVPowerCableProduceFlow2-43kV10kVFig2-43kV10kVPowerCableProduceFlow2.3.235kV35kV2-592-535kVFig2-535kVPowerCableProduceFlow2.3.32-22-2Table2-2PowerCableProduceControlParameters121kV33.635kV2.410113.13.1.1R′,[5]()[]32120201kkkAR−+=′θαρ/m3-1A–2mdn24ndAπ=)(4222211kkkdndndnAΛ++=π20ρ–20m20ρ=0.0172410-6m20ρ=0.02826410-6m1k–2k–3k–α–1/α=0.003931/α=0.004031/123.1.2R)1(SPYYRR++′=/m3-2PY–sY–PYsY448.0192ssSxxY+=3-3++++=27.08.019218.1312.08.0192442244ppCCpppxxSDsDxxY3-4sskRfx1424108−×′=π3-5ppkRfx1424108−×′=π3-6f–Dc–s–∆+=cDs∆pskk,–13PY3-42/33.2UgIiRgiIUR=zzzz[6]3.2.13-1DcDixdx12××=xdxdRvπρ(3-7)143-1Fig3-1IllustrationforCalculationofCableInsulationResistancevρ3-13-7ccvcivDDviDDDDdxxRiC∆+===∫2ln2ln2222πρπρπρ3-8∆vρmiRm3-8πρ2icCDD∆+2lnG3-8GRviπρ2=m3-9cCDDG∆+=2ln3.2.215xviGnRπρ2=3-10FGnRxviπρ2=3-11vρ,nxGFxG3-1Table3-1ElectricalResistivityofCableMaterials20m20mPE1014~1015XLPE1014~1015PVC1011~1012--3.2.3vρ)(1δωCtgRi=m3-