住宅小区配电设计外文文献翻译中英文Word文件下载.docx
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住宅小区配电设计外文文献翻译中英文Word文件下载.docx
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英文原文及中文译文)
译文字数:
3700多字
文献出处:
JEhnberg.PowerofCommunityDistributiontoDesign[J]ValueEngineering,2016,2(3):
14-21
英文原文
PowerofCommunityDistributiontoDesign
JEhnberg
ABSTRACT
Thebasicfunctionoftheelectricpowersystemistotransporttheelectricpowertowardscustomers.Thel0kVelectricdistributionnetisakeypointthatconnectsthepowersupplywiththeelectricityusingontheindustry,businessanddaily-life.Fortheelectricpower,allcostumersexpecttopaythelowestpriceforthehighestreliability,butdon'
tconsiderthatit'
sself-contradictoryintheco-existenceofeconomyandreliable.Toimprovethereliabilityofthepowersupplynetwork,wemustincreasetheinvestmentcostofthenetworkconstructionBut,ifthecostthatimprovethereliabilityofthenetworkconstruction,buttheinvestmentonthiskindofconstructionwouldbeworthlessifthereducinglossisonthepower-offislessthantheincreasinginvestmentonimprovingthereliability.Thuswefindoutabalancepointtomakethemosteconomic,betweentheinvestmentandthelossbycalculatingtheinvestmentonpowernetandthelossbroughtfrompower-off.
KEYWORDS:
powersupplyanddistribution,powerdistributionreliability,reactivecompensation,loaddistribution
Ingeneral,majorchangestothebuildinginclude:
highvoltageandlowvoltagedistributionsystems,transformers,andbackuppowersystems.Powersystemsincludepowerdistributionandcontrol,indoorandoutdoorlightingsystemsincludealltypesoflighting,andlightningprotectionsystemsincludeintrusionprotection,lightningsensors,grounding,equipotentialbonding,andlocalequipotentialbonding.Auxiliaryequipotentialbonding.Injust20years,thesystemhasundergoneenormouschangesinthefaceoftechnologyandproducts.Manydesignideashavealsochangeddramatically.Switchgear,suchasthefirstcircuit-breakeroilcircuitbreakerinahigh-voltagesystem,andthesubsequentdevelopmentofanoilcircuitbreaker,arenotonlylargeinsizebutgenerallycontainoil.Duetothelargesizeoftheswitchgear,wemustalsoestablishaseparateequipmentroomthatoccupiesalargeamountoffloorarea.Vacuumcircuitbreakersandsulfurhexafluoridecircuitbreakersarenotonlysmallinsize,butalsohavealargeshort-circuitcapacity.Thesizeofthehousingismuchlargerthanthatoftheoriginalcabinets,andthecircuitbreakersdonothaveanyoilandthefireperformanceisgreatlyimproved.Andcircuitbreakersandotherlow-voltagedevicesareinoneroom,whichsavesspaceandiseasytomanage.Inthepast,large-capacitylow-voltagecircuitbreakersgraduallyincreasedthecapacityoftheshort-circuitcurrent,graduallyreducedthescale,andbecamemorestable,makingthesystemsaferandmorereliable,whichfacilitatedthedesign.Towardsthedevelopmentofintelligentlow-voltagecircuitbreakers,variousparametersofthecircuitbreakercanbecontrolledbythebusindustryandthesignalsaretransmitteddirectlytothecomputer.
Theappearanceofdry-typetransformershasbroughtgreatconveniencetotheelectricaldesignofbuildingsbecausethereisnopossibilityofleakageoftransformeroilandfiresothatitcanbeeasilyinstalledinthebuildingitselfandevendirectlyintotheloadcenter.Italsoeliminatesthetransformer'
sdemandforoilandcanusedry-typetransformerswhenbuildinglarge-capacityequipment.FourTaiwanese2500kVAdry-typetransformershavebeenusedinactualengineeringdesign.
Intermsofusingemergencygenerators,itismuchmoreadvancedthaninthepastintermsofperformanceandsize.Inadditiontousingdieselgenerators;
emergencylightingusesEPSstandbypower;
devicesthatinterruptpowerwithinamillisecondcanuseUPS.
Thecontrolofelectricalequipmentvariesfromthecontrolofasinglecomponenttothecontrolofrelays.Inadditiontothesmallersizeofthevariouscomponentsforbetterperformance,thespecificationofthecontrolboxisalsoreduced.Becausedigitaltechnologyismoreusedincontroltoachievethebestcontrolstatustocontroltheequipment.Furtherimprovetheeffectofenergyconservation.
Therevolutionofelectricpowersystemhasbroughtanewbigroundconstruction,whichispushingthegreaterrevolutionofelectricpowertechniquealongwiththeapplicationofnewtechniqueandadvancedequipment.Especially,thecombinationoftheinformationtechniqueandelectricpowertechnique,togreatex-tent,hasimprovedreliabilityonelectricqualityandelectricsupply.Thetechnicaldevelopmentdecreasesthecostonelectricconstructionanddrivesinnovationofelectricnetwork.Onthebasisofnationalandinternationaladvancedelectricknowledge,thedissertationintroducestheresearchhotspotforpresentelectricpowersyetemasfollowing.
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),whichhasbeentestedit’svaliditybyexampleandmadetobegoodpracticaleffect.
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.Itisveryremarkabletobringtheeconomicbenefitsbyreducingtheinsulatinglevel.Usuallysuchsystemadopttheneutraldirectlygroundingandadopttheautoreclosingtoguaranteepowersupplyreliability.Onthecontrary,thesystemwhichislowerinthevoltageadoptsneutralnonegroundingtoraisepowersupplyreliability.Soitisanimportantsubjecttomakeuseofnew-typeearthdevicetoapplytothedistributionnetworkunderconsideringthesituationinsuchfactorsofvariousfieldsaspowersupplyreliability,safetyfactor,over-voltagefactor,thechoiceofrelayprotection,investment
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