供配电系统英文文献.docx

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1、供配电系统英文文献PowerSupplyandDistributionSystemABSTRACT:Thebasicfunctionoftheelectricpowersystemistotransporttheelectricpowertowardscustomers.Thel0kVelectricdistributionnetisakeypointthatconnectsthepowersupplywiththeelectricityusingontheindustry,businessanddaily-life.Fortheelectricpower,allcostumersexpect

2、topaythelowestpriceforthehighestreliability,butdontconsiderthatitsself-contradictoryintheco-existenceofeconomyandreliable.Toimprovethereliabilityofthepowersupplynetwork,wemustincreasetheinvestmentcostofthenetworkconstructionBut,ifthecostthatimprovethereliabilityofthenetworkconstruction,buttheinvestm

3、entonthiskindofconstructionwouldbeworthlessifthereducinglossisonthepower-offislessthantheincreasinginvestmentonimprovingthereliability.Thuswefindoutabalancepointtomakethemosteconomic,betweentheinvestmentandthelossbycalculatingtheinvestmentonpowernetandthelossbroughtfrompower-off.KEYWORDS:powersupply

4、anddistribution,powerdistributionreliability，reactivecompensation,loaddistributionTherevolutionofelectricpowersystemhasbroughtanewbigroundconstruction,whichispushingthegreaterrevolutionofelectricpowertechniquealongwiththeapplicationofnewtechniqueandadvancedequipment.Especially,thecombinationoftheinf

5、ormationtechniqueandelectricpowertechnique,togreatex-tent,hasimprovedreliabilityonelectricqualityandelectricsupply.Thetechnicaldevelopmentdecreasesthecostonelectricconstructionanddrivesinnovationofelectricnetwork.Onthebasisofnationalandinternatio-naladvancedelectricknowledge,thedissertationintroduce

6、stheresearchhotspotforpresentelectricpowersy-etemasfollowing.Firstly,Thisdissertationintroducesthebuildingconditionofdistributionautomation(DA),andbringsforwardtwotypicalconstructionmodesonDAconstruction,integrativemodeandfissionmode.ItemphasizetheDAstructureundertheconditionofthefissionmodeandprese

7、ntsthesystemconfiguration,themainstationscheme,thefeederscheme,theoptimizedcommunicationschemeetc.,whichisforDAresearchreference.Secondly,asforthe(DA)troublemeasurement,position,isolationandresume,Thisdissertationanalyzesthechangesofpressureandcurrentforlineproblem,getsmathequationbyeducingphaseshor

8、tcircuitandproblempositionundertheconditionofsingle-phaseandworksoutequationandseveralparametersU&,sI&andeI&tableonproblem.Itbringsoutoptimizedisolationandresumeplan,realizesautoisolationandnetworkreconstruction,reducesthepoweroffrangeandtimeandimprovesthereliabilityofelectricpowersupplythroughprobl

9、emself-diagnosesandself-analysis.Italsointroducessoftwareflowanduseforproblemjudgementandsetsamodelonnetworkreconstructionandcomputerflow.Thirdly,electricitysystemstateisestimatedtobeoneofthekeytechniquesinDArealization.Thedissertationrecommendstheresolventofbadmeasurementdataandstructuremistakeonth

10、egroundofdescribingstateestimateway.Italsoadvancesapracticaltestandjudgingwayontopologymistakeinstateestimateaboutbaddatatestandabnormityinstateestimateaswellastheproblemandeffectonbaddatafromstatemeasuretostateestimate.Asforrealtimemonitorandcontrolproblem,thedissertationintroducesanewwaytosolvethe

11、mbyelectricitybreakandexceptionalanalysis,andthewayhasbeentestedinWeifangDA.Fourthly,aboutthedifficultyforbuildingthemodelofloadforecasting,bigparameterscatterlimitandsomethingconcerned,thedissertationintroducessomeparameters,eg.weatherfactor,datetypeandsocialenvironmenteffectbasedonanalysisofroutin

12、eloadforecastingandmeans.Itpresentsthewayforelectricityloadforecastingfoundedonneuralnetwork(ANN),whichhasbeentesteditsvaliditybyexampleandmadetobegoodpracticaleffect.Fifthly,concerningthelackofconcordantwaveonpreventingconcordantwaveandnon-powercompensationandnon-continuityoncompensation,thereisato

13、pologystructureofPWMmaincircuitandnonpowertheoryonactivefilterthewavestechniqueandbuildsflatproofonthegroundofSaberDesignerandprovestobepractical.Meanwhile,itanalyzesanddesignsthewayofnon-powerneedofelectricnetworktre-ndsanddecreasinglinelosscombinedwithDA,whichhavebeentesteditsobjectiveeconomicbene

14、fitthrou-ghcountingexample.Sixthly,notonlydothedissertationdesignawayfoundedonthemagrginalelectricpricefittedtoourpresentnationalelectricpowermarketwithregardstofuturetrendsofelectricpowermarketinChinaandfairtradeunderthegovernmentsurveillance,thatisgroupcompetitioninshort-termtradeunderthewayofgrou

15、pedpriceandquantityharmony,butalsoputsforwardcombinationarithmetic,mathmodeloftradingplanandsaftyeconomicalrestriction.Itcansolvetheoriginalcontradictionbetweenmediumandlongtermcontractpriceandshorttermcompetitivepricewithimprovementoncompetitivepercentageandcutdowntheunfairincomedifferenceofelectri

16、cfactory,atthesametime,itcanoptimizetheelectriclimitforallelectricfactoriesandreducethetotalpurchasechargeofelectricpowerfromburthencurveofwholeelectricmarketnetwork.Thedistributionnetworkisanimportantlinkamongthepowersystem.Itsneutralgroundingmodeandoperationconnectssecurityandstabilityofthepowersy

17、stemdirectly.Atthesametime,theproblemaboutneutralgroundingisassociatedwithnationalconditions,naturalenvironment,devicefabricationandoperation.Forexample,theactivitysituationofthethunderandlightning,insulatingstructureandtheperipheralinterferencewillinfluencethechoiceofneutralgroundingmodeConversely,

18、neutralgroundingmodeaffectsdesign,operation,debugsanddeveloping.Generallyinthesystemhigheringradeinthevoltage,theinsulatingexpensesaccountformoresizableproportionatthetotalpriceoftheequipment.Itisveryremarkabletobringtheeconomicbenefitsbyreducingtheinsulatingle文档视界2022/baa2ac9a27284b73f3425076ijcxk5

19、klthh.htmluallysuchsystemadopttheneutraldirectlygroundingandadopttheautoreclosingtoguaranteepowersupplyreliability.Onthecontrary,thesystemwhichislowerinthevoltageadoptsneutralnonegroundingtoraisepowersupplyreliability.Soitisanimportantsubjecttomakeuseofnew-typeearthdevicetoapplytothedistributionnetw

20、orkunderconsideringthesituationinsuchfactorsofvariousfieldsaspowersupplyreliability,safetyfactor,over-voltagefactor,thechoiceofrelayprotection,investmentcost,etc.Themainworkofthispaperistoresearchandchoicetheneutralgroundingmodeofthel0kVdistributionnetwork.Theneutralgroundingmodeofthel0kVnetworkmain

21、lyadoptsnonegrounding,groundingbyarcsuppressingcoil,groundingbyreactancegroundinganddirectlygrounding.Thebestgroundingmodeisconfirmedthroughthetechnologycomparison.Itcanhelpthenetworkruninsafetyandlimittheearthelectricarcbyusingauto-trackingcompensatedeviceandusingthelineprotectionwiththedetectionof

22、thesensitivesmallgroundcurrent.Thepaperintroducesandanalyzesthecharacteristicofallkindofgroundingmodesaboutl0kVnetworkatfirst.Withthecomparisonwithtechnologicalandeconomy,theconclusionisdrawnthattheimprovedarcsuppressingcoilgroundingmodeshowsaverybigdevelopmentpotential.Then,thispaperresearchesandin

23、troducessomeoperationcharacteristicsofthearcsuppressingcoilgroundingmodeofthel0kVdistributionnetwork.Andthenthepaperputemphasisonhowtoextinguishtheearthelectricarceffectivelybyutilizingtheresonanceprinciple.Thispapercombinesthedevelopmentofdomesticandinternationaltechnologyandinnovativeachievement,a

24、ndintroducesthecomputerearthprotectionandautotrackingcompensatedevice.Itprovesthattheimprovedarcsuppressingcoilgroundingmodehavebetteroperationcharacteristicsinpowersupplyreliability,personalsecurity,securityofequipmentandinterferenceofcommunication.Theapplicationofthearcsuppressingcoilgroundingmode

25、isalsoresearchedinthispaper.Finally,thepapersummarizesthistopicresearch.Asaresultofthedominationofthearcsuppressingcoilgroundingmode,itshouldbemorepopularizedandappliedinthedistributionnetworkinthefuture.Thewayofthinking,projectandconclusionsinthisthesishaveeffectontheresearchtochoosetheneutralgroun

26、dingmodenotonlyinI0kVdistributionnetworkbutalsoinotherpowersystem.Thebasicfunctionoftheelectricpowersystemistotransporttheelectricpowertowardscustomers.Thel0kVelectricdistributionnetisakeypointthatconnectsthepowersupplywiththeelectricityusingontheindustry,businessanddaily-life.Fortheelectricpower,al

27、lcostumersexpecttopaythelowestpriceforthehighestreliability,butdontconsiderthatitsself-contradictoryintheco-existenceofeconomyandreliable.Toimprovethereliabilityofthepowersupplynetwork,wemustincreasetheinvestmentcostofthenetworkcon-structionBut,ifthecostthatimprovethereliabilityofthenetworkconstruct

28、ion,buttheinvestmentonthiskindofconstructionwouldbeworthlessifthereducinglossisonthepower-offislessthantheincreasinginvestmentonimprovingthereliability.Thuswefindoutabalancepointtomakethemosteconomic,betweentheinvestmentandthelossbycalculatingtheinvestmentonpowernetandthelossbroughtfrompower-off.The

29、thesisanalysesontheeconomicandthereliableofthevariouslinemodes,accordingtothecharacteristicsvariouslinemodesexistedintheelectricdistributionnetinfoshan.First,thethesisintroducesasthedifferentlinemodesinthel0kVelectricdistributionnetandinsomeforeigncountries.Makingitcleartowtoconductanalyzingonthelin

30、emodeoftheelectricdistributionnet,andtellingushowimportantandnecessarythatanalysesare.Second,itturnstothenecessityofcalculatingthenumberofoptimizationsubsection,elaboratinghowitinfluencesontheeconomyandreliability.Thenbybuildingupthecalculationmodeofthenumberofoptimizationsubsectionitintroducesdiffe

31、rentpowersupplyprojectsonthedifferentlinemodesinbrief.Third,itcarriesonthecalculationandanalysestowardsthereliabilityandeconomyofthedifferentlinemodesofelectricdistributionnet,describingdraftsaccordingbythecalculation.Thenitmakesanalysisanddiscussiononthenumberofoptimizationsubsection.Atlast,thearti

32、clemakeconclusionontheeconomyandreliabilityofdifferentlinemodes,aswellas,itsapplicationsituation.Accordiontotheactualcircumstance,thethesisputsforwardthebeneficialsuggestionontheprogrammingandconstructionofthel0kVelectricdistributionnetinallareasinfoshan.Providingthebasictheoriesandbeneficialguidelinefortheprogrammingdesignofthe10kVelectricdistributionnetandbuildingupasolidnet,reasonablelayout,qualifiedsafeandefficiently-workedelectricdistributionnet.