外文翻译浅谈高层建筑供配电系统设计.docx

外文翻译浅谈高层建筑供配电系统设计.docx

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外文翻译浅谈高层建筑供配电系统设计

中文4323字

外文资料翻译

Powersupplysystemofhigh-risebuildingdesign

Abstract:

withthecontinuousdevelopmentofcitysize,moreandmorehigh-risebuildings,thereforehigh-risebuildingelectricaldesigntothedesignershadtoface.Inthispaper,anengineeringexample,describestheelectricaldesignofhigh-risebuildingsandsomeofthemoretypicalissuesofuniversalsignificance,combinedwiththeactualpracticeofanengineeringsolutiontotheproblemdescribed.

Keywords:

high-risebuilding;electricaldesign;distribution;loadcalculation

1ProjectOverview

Thecommercialcomplexproject,withatotalconstructionareaof405570m2,onthegroundfloorareaof272330m2,undergroundconstructionareaof133240m2,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;followedtodetermineparameterindexwithintheunitareaofshopsisalsoveryimportantandcomplexbecausethereisnoclearindicatorofthespecificationcanreferto;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【8】.

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.Prerequisites

Theloopthatyouwanttoauto-tunemustbeinautomaticmode.TheloopoutputmustbecontrolledbytheexecutionofthePIDinstruction.Auto-tunewillfailiftheloopisinmanualmode.

Beforeinitiatinganauto-tuneoperationyourprocessmustbebroughttoastablestatewhichmeansthatthePVhasreachedsetpoint（orforaPtypeloop,aconstantdifferencebetweenPVandsetpoint）andtheoutputisnotchangingerratically.

Ideally,theloopoutputvalueneedstobenearthecenterofthecontrolrangewhenauto-tuningisstarted.Theauto-tuneproceduresetsupanoscillationintheprocessbymakingsmallstepchangesintheloopoutput.Iftheloopoutputisclosetoeitherextremeofitscontrolrange,thestepchangesintroducedintheauto-tuneproceduremaycausetheoutputvaluetoattempttoexceedtheminimumorthemaximumrangelimit.

Ifthisweretohappen,itmayresultinthegenerationofanauto-tuneerrorcondition,anditwillcertainlyresultinthedeterminationoflessthannearoptimalsuggestedvalues.

Auto-HysteresisandAuto-Deviation

Thehysteresisparameterspecifiestheexcursion（plusorminus）fromsetpointthatthePV（processvariable）isallowedtomakewithoutcausingtherelaycontrollertochangetheoutput.ThisvalueisusedtominimizetheeffectofnoiseinthePVsignaltomoreaccuratelydeterminethenaturaloscillationfrequencyoftheprocess.

Ifyouselecttoautomaticallydeterminethehysteresisvalue,thePIDAuto-Tunerwillenterahysteresisdeterminationsequence.Thissequenceinvolvessamplingtheprocessvariableforaperiodoftimeandthenperformingastandarddeviationcalculationonthesampleresults.

Inordertohaveastatisticallymeaningfulsample,asetofatleast100sample