供配电系统英文文献.docx

供配电系统英文文献PowerSupplyandDistributionSystemABSTRACT:Thebasicfunctionoftheelectricpowersystemistotransporttheelectricpowertowardscustomers.Thel0kVelectricdistributionnetisakeypointthatconnectsthepowersupplywiththeelectricityusingontheindustry,businessanddaily-life.Fortheelectricpower,allcostumersexpecttopaythelowestpriceforthehighestreliability,butdon'tconsiderthatit'sself-contradictoryintheco-existenceofeconomyandreliable.Toimprovethereliabilityofthepowersupplynetwork,wemustincreasetheinvestmentcostofthenetworkconstructionBut,ifthecostthatimprovethereliabilityofthenetworkconstruction,buttheinvestmentonthiskindofconstructionwouldbeworthlessifthereducinglossisonthepower-offislessthantheincreasinginvestmentonimprovingthereliability.Thuswefindoutabalancepointtomakethemosteconomic,betweentheinvestmentandthelossbycalculatingtheinvestmentonpowernetandthelossbroughtfrompower-off.KEYWORDS:powersupplyanddistribution,powerdistributionreliability，reactivecompensation,loaddistributionTherevolutionofelectricpowersystemhasbroughtanewbigroundconstruction,whichispushingthegreaterrevolutionofelectricpowertechniquealongwiththeapplicationofnewtechniqueandadvancedequipment.Especially,thecombinationoftheinformationtechniqueandelectricpowertechnique,togreatex-tent,hasimprovedreliabilityonelectricqualityandelectricsupply.Thetechnicaldevelopmentdecreasesthecostonelectricconstructionanddrivesinnovationofelectricnetwork.Onthebasisofnationalandinternatio-naladvancedelectricknowledge,thedissertationintroducestheresearchhotspotforpresentelectricpowersy-etemasfollowing.Firstly,Thisdissertationintroducesthebuildingconditionofdistributionautomation(DA),andbringsforwardtwotypicalconstructionmodesonDAconstruction,integrativemodeandfissionmode.ItemphasizetheDAstructureundertheconditionofthefissionmodeandpresentsthesystemconfiguration,themainstationscheme,thefeederscheme,theoptimizedcommunicationschemeetc.,whichisforDAresearchreference.Secondly,asforthe(DA)troublemeasurement,position,isolationandresume,Thisdissertationanalyzesthechangesofpressureandcurrentforlineproblem,getsmathequationbyeducingphaseshortcircuitandproblempositionundertheconditionofsingle-phaseandworksoutequationandseveralparametersU&,sI&andeI&tableonproblem.Itbringsoutoptimizedisolationandresumeplan,realizesautoisolationandnetworkreconstruction,reducesthepoweroffrangeandtimeandimprovesthereliabilityofelectricpowersupplythroughproblemself-diagnosesandself-analysis.Italsointroducessoftwareflowanduseforproblemjudgementandsetsamodelonnetworkreconstructionandcomputerflow.Thirdly,electricitysystemstateisestimatedtobeoneofthekeytechniquesinDArealization.Thedissertationrecommendstheresolventofbadmeasurementdataandstructuremistakeonthegroundofdescribingstateestimateway.Italsoadvancesapracticaltestandjudgingwayontopologymistakeinstateestimateaboutbaddatatestandabnormityinstateestimateaswellastheproblemandeffectonbaddatafromstatemeasuretostateestimate.Asforrealtimemonitorandcontrolproblem,thedissertationintroducesanewwaytosolvethembyelectricitybreakandexceptionalanalysis,andthewayhasbeentestedinWeifangDA.Fourthly,aboutthedifficultyforbuildingthemodelofloadforecasting,bigparameterscatterlimitandsomethingconcerned,thedissertationintroducessomeparameters,eg.weatherfactor,datetypeandsocialenvironmenteffectbasedonanalysisofroutineloadforecastingandmeans.Itpresentsthewayforelectricityloadforecastingfoundedonneuralnetwork(ANN),whichhasbeentesteditsvaliditybyexampleandmadetobegoodpracticaleffect.Fifthly,concerningthelackofconcordantwaveonpreventingconcordantwaveandnon-powercompensationandnon-continuityoncompensation,thereisatopologystructureofPWMmaincircuitandnonpowertheoryonactivefilterthewavestechniqueandbuildsflatproofonthegroundofSaberDesignerandprovestobepractical.Meanwhile,itanalyzesanddesignsthewayofnon-powerneedofelectricnetworktre-ndsanddecreasinglinelosscombinedwithDA,whichhavebeentesteditsobjectiveeconomicbenefitthrou-ghcountingexample.Sixthly,notonlydothedissertationdesignawayfoundedonthemagrginalelectricpricefittedtoourpresentnationalelectricpowermarketwithregardstofuturetrendsofelectricpowermarketinChinaandfairtradeunderthegovernmentsurveillance,thatisgroupcompetitioninshort-termtradeunderthewayofgroupedpriceandquantityharmony,butalsoputsforwardcombinationarithmetic,mathmodeloftradingplanandsaftyeconomicalrestriction.Itcansolvetheoriginalcontradictionbetweenmediumandlongtermcontractpriceandshorttermcompetitivepricewithimprovementoncompetitivepercentageandcutdowntheunfairincomedifferenceofelectricfactory,atthesametime,itcanoptimizetheelectriclimitforallelectricfactoriesandreducethetotalpurchasechargeofelectricpowerfromburthencurveofwholeelectricmarketnetwork.Thedistributionnetworkisanimportantlinkamongthepowersystem.Itsneutralgroundingmodeandoperationconnectssecurityandstabilityofthepowersystemdirectly.Atthesametime,theproblemaboutneutralgroundingisassociatedwithnationalconditions,naturalenvironment,devicefabricationandoperation.Forexample,theactivitysituationofthethunderandlightning,insulatingstructureandtheperipheralinterferencewillinfluencethechoiceofneutralgroundingmodeConversely,neutralgroundingmodeaffectsdesign,operation,debugsanddeveloping.Generallyinthesystemhigheringradeinthevoltage,theinsulatingexpensesaccountformoresizableproportionatthetotalpriceoftheequipment.Itisveryremarkabletobringtheeconomicbenefitsbyreducingtheinsulatingle文档视界2022/baa2ac9a27284b73f3425076ijcxk5klthh.htmluallysuchsystemadopttheneutraldirectlygroundingandadopttheautoreclosingtoguaranteepowersupplyreliability.Onthecontrary,thesystemwhichislowerinthevoltageadoptsneutralnonegroundingtoraisepowersupplyreliability.Soitisanimportantsubjecttomakeuseofnew-typeearthdevicetoapplytothedistributionnetworkunderconsideringthesituationinsuchfactorsofvariousfieldsaspowersupplyreliability,safetyfactor,over-voltagefactor,thechoiceofrelayprotection,investmentcost,etc.Themainworkofthispaperistoresearchandchoicetheneutralgroundingmodeofthel0kVdistributionnetwork.Theneutralgroundingmodeofthel0kVnetworkmainlyadoptsnonegrounding,groundingbyarcsuppressingcoil,groundingbyreactancegroundinganddirectlygrounding.Thebestgroundingmodeisconfirmedthroughthetechnologycomparison.Itcanhelpthenetworkruninsafetyandlimittheearthelectricarcbyusingauto-trackingcompensatedeviceandusingthelineprotectionwiththedetectionofthesensitivesmallgroundcurrent.Thepaperintroducesandanalyzesthecharacteristicofallkindofgroundingmodesaboutl0kVnetworkatfirst.Withthecomparisonwithtechnologicalandeconomy,theconclusionisdrawnthattheimprovedarcsuppressingcoilgroundingmodeshowsaverybigdevelopmentpotential.Then,thispaperresearchesandintroducessomeoperationcharacteristicsofthearcsuppressingcoilgroundingmodeofthel0kVdistributionnetwork.Andthenthepaperputemphasisonhowtoextinguishtheearthelectricarceffectivelybyutilizingtheresonanceprinciple.Thispapercombinesthedevelopmentofdomesticandinternationaltechnologyandinnovativeachievement,andintroducesthecomputerearthprotectionandautotrackingcompensatedevice.Itprovesthattheimprovedarcsuppressingcoilgroundingmodehavebetteroperationcharacteristicsinpowersupplyreliability,personalsecurity,securityofequipmentandinterferenceofcommunication.Theapplicationofthearcsuppressingcoilgroundingmodeisalsoresearchedinthispaper.Finally,thepapersummarizesthistopicresearch.Asaresultofthedominationofthearcsuppressingcoilgroundingmode,itshouldbemorepopularizedandappliedinthedistributionnetworkinthefuture.Thewayofthinking,projectandconclusionsinthisthesishaveeffectontheresearchtochoosetheneutralgroundingmodenotonlyinI0kVdistributionnetworkbutalsoinotherpowersystem.Thebasicfunctionoftheelectricpowersystemistotransporttheelectricpowertowardscustomers.Thel0kVelectricdistributionnetisakeypointthatconnectsthepowersupplywiththeelectricityusingontheindustry,businessanddaily-life.Fortheelectricpower,allcostumersexpecttopaythelowestpriceforthehighestreliability,butdon'tconsiderthatit'sself-contradictoryintheco-existenceofeconomyandreliable.Toimprovethereliabilityofthepowersupplynetwork,wemustincreasetheinvestmentcostofthenetworkcon-structionBut,ifthecostthatimprovethereliabilityofthenetworkconstruction,buttheinvestmentonthiskindofconstructionwouldbeworthlessifthereducinglossisonthepower-offislessthantheincreasinginvestmentonimprovingthereliability.Thuswefindoutabalancepointtomakethemosteconomic,betweentheinvestmentandthelossbycalculatingtheinvestmentonpowernetandthelossbroughtfrompower-off.Thethesisanalysesontheeconomicandthereliableofthevariouslinemodes,accordingtothecharacteristicsvariouslinemodesexistedintheelectricdistributionnetinfoshan.First,thethesisintroducesasthedifferentlinemodesinthel0kVelectricdistributionnetandinsomeforeigncountries.Makingitcleartowtoconductanalyzingonthelinemodeoftheelectricdistributionnet,andtellingushowimportantandnecessarythatanalysesare.Second,itturnstothenecessityofcalculatingthenumberofoptimizationsubsection,elaboratinghowitinfluencesontheeconomyandreliability.Thenbybuildingupthecalculationmodeofthenumberofoptimizationsubsectionitintroducesdifferentpowersupplyprojectsonthedifferentlinemodesinbrief.Third,itcarriesonthecalculationandanalysestowardsthereliabilityandeconomyofthedifferentlinemodesofelectricdistributionnet,describingdraftsaccordingbythecalculation.Thenitmakesanalysisanddiscussiononthenumberofoptimizationsubsection.Atlast,thearticlemakeconclusionontheeconomyandreliabilityofdifferentlinemodes,aswellas,itsapplicationsituation.Accordiontotheactualcircumstance,thethesisputsforwardthebeneficialsuggestionontheprogrammingandconstructionofthel0kVelectricdistributionnetinallareasinfoshan.Providingthebasictheoriesandbeneficialguidelinefortheprogrammingdesignofthe10kVelectricdistributionnetandbuildingupasolidnet,reasonablelayout,qualifiedsafeandefficiently-workedelectricdistributionnet.