Powersupplysystemofhigh-risebuildingdesign

Abstract:Withthecontinuousdevelopmentofcitysize,moreandmorehigh-risebuildings,therefore,high-risebuildingelectricaldesigntothedesignershadtoface.Inthispaper,anengineeringexample,describestheelectricaldesignofhigh-risebuildingsandsomeofthemoretypicalissuesofuniversalsignificance,combinedwiththeactualpracticeofanengineeringsolutiontotheproblemdescribed.

Keywords:high-risebuilding;electricaldesign;distribution;loadcalculation

1ProjectOverview

Thecommercialcomplexproject,withatotalconstructionareaof??405570m2,onthegroundfloorareaof??272330m2,undergroundconstructionareaof??133240m2,themainheightof99m.Projectcomponentsare:twoofficebuildings,constructionareais70800m2,28layers,thestandardstoryis3.2m.

2LoadCalculation

1)Loadcharacteristics:electricload,muchlargerthanthe"nationalcivilengineeringtechnicalmeasures"Large120W/m2indicators,especiallyintheelectricityloadmorefood,anddifferenttypesoffoodandbeveragecateringdifferentculturalbackgroundsalsohigh.

2)theuncertaintyofalargeload,becausethecommercialrealestaterentsareoftenbasedonmarketdemand,andconstantlyadjustthenatureoftheshops,makingtheloadinthedynamicchanges.

3)Thereisnospecificationandtechnicalmeasuresinthedifferenttypesofcommercialprojectsrefertothedetailedparametersoftheshops,engineeringdesignloadcalculationinthelackofdata,inmostcasestorelyonstaffwithpreviousexperienceinengineeringdesigncalculations.

Loadtheselectionofparameters:fortheaboveproblems,theloadcalculation,thefirstdeveloperofsalesandgoodcommunication,todeterminetheformoflayersoftheformsandnatureoffloorarea,whichiscalculatedonthebasisofelectricalloadbasis;followedtodetermineparameterindexwithintheunitareaof??shopsisalsoveryimportantandcomplexbecausethereisnoclearindicatorofthespecificationcanreferto;anddifferentlevelsofeconomicdevelopmentbetweencitiesisnotbalanced,powerindicesarealsodifferent;willbeinthesamecity,differentregionshavedifferentconsumergroups.

3)theneedtofactorinthechoice:parametersdetermined,theneedforloadcalculation.Needtofactorcommonlyusedmethod,thecalculationwillnotrepeatthem.Needtoexploreistheneedforcoefficientselection,whichinthecurrentspecifications,manualsandthe"unifiedtechnicalmeasures"isalsonotclearrequirements,basedonyearsofdesignexperiencethatmostendshopsinthedistributionorlevelwithinthehouseholddistributionboxwithcaseKxgenerallytakeawhile,inthecalculationofthelooproutetotake0.7to0.8,thedistributiontransformersinthesubstationcalculationstake0.4to0.6.

3substationsset

Loadcalculationbasedontheresultsofthisprojectthetotalinstalledcapacityoftransformer43400Kv.A,afterrepeatedconsultationswiththepowercompany,respectively,intheprojectinnorthern,centralandsouthernthreesectionssetthethreebuildingsintothreepowersubstations,1#set6sets2500Kv.Atransformersubstation,takethenorthernsectionofpowersupply;2#41600Kv.Atransformersubstationslocated,plus6sets2000Kv.Atransformers,takethemiddleofthepowersupply,inadditionto5Taiwan10Kv.Ahigh-pressurewaterchillers(total4000Kv.A);3#substationlocated2unitsplus2units1000Kv.A2000Kv.Atransformers,takethesouthernsectionofA,Btwoofficesupply.10Kvpowerconfigurationofthisprojectintotwopoints,eachatthetwo10Kvlines,thepowercompanyundertheprovisionsof10Kvpowercapacity:maximumloadperchannelisaboutto11000Kv.A,twoisthe22000Kv.A,design#1,3#combinationofasubstation10Kv,powerline,withatotalcapacityof21000Kv.A;2#substationtransformersand10Kv,10Kvchillerssharingapowerline,withatotalcapacityof22400Kv.A.Thedesignofthesubstationlayout,inadditiontomeetingregulatoryrequirements,italsoneedtoconsiderthehigh-pressurecabinets,transformersandlowvoltagepowersupplycabinetbyorderofarrangement,especiallyinlowvoltagedistributioncabinettofeedthecablesmoothandeasyinspectiondutyproblemsarenotseriouslyconsidertheconstructionofthecablecrossingwillcausemorelongdetour,awasteoffloorspace,andconvenientinspectionsandotherissues.

4smallfireloadpowersupply

Inthedesignoflargecommercialprojectsoftenencountersmallfireloadofelectricalequipmentandmoredisperseddistribution,iffedbyasubstation,asubstationwillbefedalotoflow-voltagelow-currentcountercircuitbreakingcapacitycircuitbreakerandconductorofthedynamicandthermalstabilityinacertainextent.AccordingtoGB50045-1995"fireprotectiondesignoftallbuildings,"rule"shouldbeusedinFireEquipmentdedicatedpowersupplycircuit,thepowerdistributionequipmentshallbeprovidedwithclearsigns."Interpretationoftheprovisionsofthepowersupplycircuitmeans"fromthelow-voltagemaindistributionroom(includingthedistributionofelectricalroom)tolastadistributionbox,andthegeneraldistributionlinesshouldbestrictlyseparated."Inthisdesign,theuseofmethodstoincreasethelevelofdistribution,thatisdifferentfromthesubstationbussegments,respectively,afirefedaspecialcircuit,setinplacetwodistributioncabinets,distributioncabinetsandthentheresultingradialallocatedtotheendofthedualpowertovoteeachbox,sothatnotonlymeetsthespecificationrequirementsfordedicatedpowersupplycircuit,butalsotoavoidfeedingthesubstationlevelofmanysmallcurrentloop.

5,thechoiceofcircuitbreakerandconductor

Commercialrealestateprojectsusetheroomastheuncertaintyinthechoiceofcircuitbreakersandconductorsmustbeconsideredinacertainmargintomeettheneedscausedbyadjustmentoftheloadchanges.Accordingtothischaracteristic,increaseduseinthedesignoftheplugbus-powered,notonlymeettherequirementsoflargecarryingcapacity,andalsoallowstheflexibilitytoincreasesupplyanddistribution,arereservedineachshaftintheplug-boxbackupinordertochange,accordingtochangesinupperandlowerload,toadjust.Forexample:abusisresponsibleforashaft1to3layersofpower,whenalayerduetothechangeincapacityincreases,whilethe3-layercapacityisreduced,youcanuseaspareplugboxlayeroffthe3-layer1layercapacityrationing.Thisleveldistributioninthesubstation,selectthecircuitbreakertochoosethesettingvaluewhenthecircuitbreakertoadjusttochangesattheendtoadjusttheloadsettingvalue;inthebusandthetransformercircuitbreakeraccordingtothechoiceofthegeneralframeworkofvalues??toselect.Forexample:Routecertainequipmentcapacity530Kv,Kxtake0.7tocalculatecurrentof704A,selecttheframecircuitbreakeris1000A,tuningis800A;currenttransformerforthe1000/50;buscarryingcapacityforthe1000A,thisroadcanmeetthemaximum1000Acurrentloadrequirements,evenifthereisadjustment,powerdistributionswitchesandcircuitcannotmakebigchanges.

6layerdistributionboxset

Accordingtothedivisionoflayersoffireprotectiondistrict,respectivelynumberedasA~Klayerswithinthesetlevelshaftfortheretaillightingpowerdistributionbox,withoneononepowersupplyshopsinradialpower.Shouldbenotedthattheformsofthecomplexlayersoflayersoffirepartition,doesnotcorrespondtothelower,makingsomeofshaftpowerinchargeofthefiredistrictatthesametime,alsoresponsibleforthepowersupplyadjacenttothefiredistrict.Atdesigntime,usingtheprincipleofproximity,whilealsotakingintoaccounttheburdenofthewholetrunkloadconditions,sothateachshaftasfaraspossibleamorebalancedload.

7publicareadistributionboxset

Takingintoaccountthefutureneedsofthebusinessre-decorationofpublicareasmustbereservedforpower.Herethedesignneedstoconsiderthefollowingpoints:①questionofhowmuchreservepower,lightingandelectricity,whichaccordingtoGB50034-2004

"ArchitecturalLightingDesignStandards"tableofArticle6.1.3and6.1.8,commercialbuildinglightingpowerdensityvalue,high-endsupermarkets,businessofficesas20W/m2,underthe"decorativelightingincluded50%ofthetotallightingpowerdensitycalculation"requirements,usingthereservedstandard40W/m2.②Inordertofacilitatethedecorationineachpartitionsetfirelightinginpublicareasandemergencylightingdistributionboxdistributionbox,inordertoidentifytheelectricalpowerdistributiondecorationcut-offpoint.

③thestaircase,storageroomsandotherpartsofthedecorationdoesnotneedtodo,setthepowerdistributioncircuitoraseparatedistributionbox,trynottobereservedfromthepublicareaof??electricitydistributionboardfedhardcoverout.

④controloflightinginpublicareas,themajorityintwoways,namely,C-BUScontrolsystemortheBAsystem,theuseofC-BUShastheadvantageofmoreflexiblecontrol,eachroadcanbefedoutofcontrol,adjustablelightcontrol;shortcomingsisahighercost.BAsystemcontroladvantagesofusinglowcost,simplecontrol;disadvantageisthattheexchangesandcontactsforthethree-phase,three-waycontrolmayberelatedbothtoopen,orboth,inthedecorationofthecontactsrequiredtofeedthepowersupplycircuitdivergetoavoidfailureblackouts.

Designofdistributionbox8

Inthecommercialrealestatedesign,shopdesignisoftenonlyameterbox,andoutletroutebacktotheneedsoftheuseraccordingtotheirseconddesign,buttheshopsaredifficulttoresolvewithinthepowersupplyfancoilunits,air-conditioningsystemasawholecannotdebug.Theprojectapproachistoaddacircuitbreakerinthemeterboxforthecoilpowersupply,anotherwayforuserstousetheseconddesign,asshownbelow.

Userdistributionboxdesign

9distributioncabinet/boxnumberanddistributioncircuits

Large-scaleprojectsareoftenlowvoltagedistributioncabinet/boxnumber,low-voltagecircuitstofeedthemoreoftentherewillbecabinet/boxnumberandlinenumberduplication,resultinginthedesignandthefuturelooksdifficultmaintenanceandoverhaul.Theprojecthasthree10Kvsubstations,20transformer,hundredsoflow-voltagefedoutofthecloset,fedthecircuitmore.AccordancewiththeInternationalElectrotechnicalCommission(IEC)andtheChinesenationalstandardrequirements:①Allthedistributionnumbertobesimpleandclear,nottooboxandlinenumbersarenotrepeated.②numbertosimpleandclear,nottoolong.③distinctionbetweennatureandtypeofload.④lawwaseasytofind,makeviewerataglance.Basedontheaboverequirementsandontheground,firedistrictandtheundergroundconstructionindustryformthedifferentconditions,usingtwoslightlydifferentways.Essentialfortheundergroundgarage,usesasinglecomparison,alsorelativelyfiredistrictneat,accordingtofiredistrictnumber,suchasAL-BL-1/1,APandAPE,themeaningofthelettersandnumbers:ALonbehalfoflightingdistribution(APonbehalfofPowerdistributionbox,APEonbehalfoftheemergencypowerdistributionbox);BIonbehalfofthebasement;1/1forpartition1,Ifirebox.Abovegroundismorecomplex,morefiredistrict,andonthefiredistrictdoesnotcorrespondtothelower,accordingtoshaftnumberisbetter,suchasAL-1-A1,AP,andAPE,lettersandnumbersmean:1representsalayer;A1onbehalfofA,No.1shaftfedadistributionbox.Fedalow-voltagecircuits,suchasthenumberofuses:W3-6-AL-1-A1,W3-6)indicatesthattheroutebacktopowersupplytransformer3,6,feedthepowerdistributioncabinet,AL-1-A1,saidthethenthefirstloopofthedistributionboxfortheAL-1-A1andsoon,andsoon.

10Conclusion

Withmoreandmorecomplexcommercialdesignprojects,designersneedtocontinuallyimprovethedesignlevel,designedtomakefine.Theseareonlybitsofthedesigninthebusinesslessonslearned,andthemajorityofdesignerswanttocommunicate

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