搜索
Powersupplysystemofhigh-risebuildingdesignAbstract:Withthecontinuousdevelopmentofcitysize,moreandmorehigh-risebuildings,therefore,high-risebuildingelectricaldesigntothedesignershadtoface.Inthispaper,anengineeringexample,describestheelectricaldesignofhigh-risebuildingsandsomeofthemoretypicalissuesofuniversalsignificance,combinedwiththeactualpracticeofanengineeringsolutiontotheproblemdescribed.Keywords:high-risebuilding;electricaldesign;distribution;loadcalculation1ProjectOverviewThecommercialcomplexproject,withatotalconstructionareaof405570m2,onthegroundfloorareaof272330m2,undergroundconstructionareaof133240m2,themainheightof99m.Projectcomponentsare:twoofficebuildings,constructionareais70800m2,28layers,thestandardstoryis3.2m.2LoadCalculation1)Loadcharacteristics:electricload,muchlargerthanthenationalcivilengineeringtechnicalmeasuresLarge120W/m2indicators,especiallyintheelectricityloadmorefood,anddifferenttypesoffoodandbeveragecateringdifferentculturalbackgroundsalsohigh.2)theuncertaintyofalargeload,becausethecommercialrealestaterentsareoftenbasedonmarketdemand,andconstantlyadjustthenatureoftheshops,makingtheloadinthedynamicchanges.3)Thereisnospecificationandtechnicalmeasuresinthedifferenttypesofcommercialprojectsrefertothedetailedparametersoftheshops,engineeringdesignloadcalculationinthelackofdata,inmostcasestorelyonstaffwithpreviousexperienceinengineeringdesigncalculations.Loadtheselectionofparameters:fortheaboveproblems,theloadcalculation,thefirstdeveloperofsalesandgoodcommunication,todeterminetheformoflayersoftheformsandnatureoffloorarea,whichiscalculatedonthebasisofelectricalloadbasis;followedtodetermineparameterindexwithintheunitareaofshopsisalsoveryimportantandcomplexbecausethereisnoclearindicatorofthespecificationcanreferto;anddifferentlevelsofeconomicdevelopmentbetweencitiesisnotbalanced,powerindicesarealsodifferent;willbeinthesamecity,differentregionshavedifferentconsumergroups.3)theneedtofactorinthechoice:parametersdetermined,theneedforloadcalculation.Needtofactorcommonlyusedmethod,thecalculationwillnotrepeatthem.Needtoexploreistheneedforcoefficientselection,whichinthecurrentspecifications,manualsandtheunifiedtechnicalmeasuresisalsonotclearrequirements,basedonyearsofdesignexperiencethatmostendshopsinthedistributionorlevelwithinthehouseholddistributionboxwithcaseKxgenerallytakeawhile,inthecalculationofthelooproutetotake0.7to0.8,thedistributiontransformersinthesubstationcalculationstake0.4to0.6.3substationssetLoadcalculationbasedontheresultsofthisprojectthetotalinstalledcapacityoftransformer43400Kv.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.4smallfireloadpowersupplyInthedesignoflargecommercialprojectsoftenencountersmallfireloadofelectricalequipmentandmoredisperseddistribution,iffedbyasubstation,asubstationwillbefedalotoflow-voltagelow-currentcountercircuitbreakingcapacitycircuitbreakerandconductorofthedynamicandthermalstabilityinacertainextent.AccordingtoGB50045-1995fireprotectiondesignoftallbuildings,ruleshouldbeusedinFireEquipmentdedicatedpowersupplycircuit,thepowerdistributionequipmentshallbeprovidedwithclearsigns.Interpretationoftheprovisionsofthepowersupplycircuitmeansfromthelow-voltagemaindistributionroom(includingthedistributionofelectricalroom)tolastadistributionbox,andthegeneraldistributionlinesshouldbestrictlyseparated.Inthisdesign,theuseofmethodstoincreasethelevelofdistribution,thatisdifferentfromthesubstationbussegments,respectively,afirefedaspecialcircuit,setinplacetwodistributioncabinets,distributioncabinetsandthentheresultingradialallocatedtotheendofthedualpowertovoteeachbox,sothatnotonlymeetsthespecificationrequirementsfordedicatedpowersupplycircuit,butalsotoavoidfeedingthesubstationlevelofmanysmallcurrentloop.5,thechoiceofcircuitbreakerandconductorCommercialrealestateproject