Power distribution design for highWord格式文档下载.docx

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AsChina'

snationaleconomicdevelopment,buildingmoreandmoreland,moreandmorepreciouslandresources,promptingthedevelopmentofvarioustypesofconstructiontothehigh-level,sohigh-risebuildingfiresafetyisincreasinglyacause-oriented.Forthecharacteristicsofhigh-risebuildingfires,high-risebuildingfiresafetydesignshouldbebasedonself-defenseself-help,whilethefireserviceforthedistributionistoensurethenormaloperationofthekeyfire-fightingfacilities,directlyrelatedtohigh-risebuildingfiresafety.Therefore,thisarticlefromthefirepowerconfiguration,firedistribution,fireelectricalwiringforhigh-risebuildingpowersupplyanddistributionreliabilityanalysis,proposeappropriatesolutionstoensurehigh-risebuildingfiresafetystandards.

1.High-risebuildingfirepowerscheme

1.1specificationpowersupplyrequirementsforfire

Accordingto"

fireprotectiondesignoftallbuildings"

（hereinafterreferredtoas"

highregulation"

）provideshigh-risebuildingfirepowershouldbethecurrentnationalstandard"

forpowerdistributionsystemdesignspecifications,"

therequirementsofthedesign,aclassofconstructionbyaloadofrequiredpowersupply,second-classhigh-risebuildingsshouldbetwopowerloadrequirements.Accordingto"

civilelectricalspecifications"

（JGJ/T16-92）providesaloadconsistsoftwopowersupply,whenapowerfailure,theotheratthesametimethepoweroutageBuzhiYu;

aloadisespeciallyimportantinload,inadditiontotheabove-mentionedtwopowersupplies,the

Mustalsobeanadditionalemergencypowersupplyofthethirdpower;

2loadpowershouldmakesurethatwhenthepowertransformerfailureorcircuitcommonfailure,withoutinterruptionofpowersupply（ortherapidrecoveryaftertheinterruption）,theloadisrelativelysmallorregionalpowersupplyThedifficultconditions,thetwoloadscanbemorethanareturnto6KVdedicatedoverheadpowerlinesorcables.

1.2Thecompositionofhigh-risebuildingfirepower

Firepoweristoensurethathigh-risebuildingandfirenormallyfire-fightingequipmentundernormalelectricitysupply.Generallyconsideredthemainpowersupplyandposeafireemergencypowersupply.Whenthemainpowerfailure,emergencypowersupplycancontinuetosupplytothefire-fightingequipment.Commonlyusedinemergencypowersupplyare:

（1）independentofthenormalpower-generatingunits

（2）powersupplynetwork,independentofthenormalpowersupplydedicatedfeedercircuit.（3）battery;

（4）drybatteries.

1.3commonFirePower

1.3.1DualPowerhigh-voltagesingle-supplybusisnotsub-

Dualpowerhigh-voltagepowersupplysectionisnotasinglebus,two-loophigh-voltagepowersupplyatthesametime,prepareanormalonetouse,inthiswaytoreducecontactbetweencabinetsandavoltagetransformercabinet,savinginfrastructureinvestment,reducingthehighvoltagedistributionElectricroombuildingareaisbeneficialtoboth,thisapproachrequirestwo-wayareguaranteed100%oftheloadofelectricity,whenthecleaningbusorbusfailurewillcauseallthepoweroutages,poorreliabilityoftheirelectricitysupplyisgenerallynotusedinhigh-riseconstruction.

1.3.2DualPowerhigh-voltagesingle-supplybusbarsection

Dualpowersupplyhigh-pressuresingle-busbarsub-way,two-loophigh-voltagepowersupplyatthesametime,eachotherback.Highreliabilityofthisapproach,particularlyforelectricalequipment,firetwopowerrequirementsatthelastandeasytoimplementtheprovisionsofaswitch,whichisrelativelycommonwiring.

1.3.33powersupplyhigh-pressuresingle-bussub-

Threesub-powerhigh-voltagesinglepowersupplybus,three-loophigh-voltagepowersupply,thenormaldual-usewhenapreparation,thisapproachhasahighreliability,suitableforalargerloadcapacityoftheimportantusers.

1.3.4amainhighvoltagepowersupply,380Vpowersupplyforthecity,emergencypowersupplynetwork

Smallerbuilding,wasnotbytheconsumption,thelocalaccesstotwopowersuppliesanddifficult,inthevicinityhave380Vpowersupplywhenthemainpowersupplycanbeusedahigh-voltagepowersupply,380Vpowersupplyforemergencypowersupply.Iftheeconomycanalsobeallowediftheuseofdieselgeneratorsetsforemergencypowersupply.

1.4plustheideaofdiesel-poweredgeneratorsets

Atpresenthigh-risebuildings,internationalanddomesticuniversalpowersupplyisbasedonthedual-powersupplywasequippedwithadieselgeneratorasanemergencypowersupply,whichisespeciallyimportanttomeetaloadofpowersupplyloadrequirements（Figure1doesnotincludethedottedlinepartofthe）.However,dualpowerplusthepowersupplyofdieselgeneratingsetsinmostpartsofnorthernChinaarestillsubjecttoweatherconditions.Asalongtimeinthenorthinwinter,thetemperaturelow.Asanemergencypowersupplydieselgeneratorsetsatlowtemperaturesisdifficulttoimmediatelystartpowersupply,andsomeeventwoorthreeminutescannotstart.

Thedualpowersupplyinmostpartsof10KVsubstationquotedfromthesamestrictsense,itsessenceisapowerfailurewhenthesubstation,thetwopowersuppliesalsofailed,causingpowersupplysystemcompletelyparalyzed.Infirecases,thiswillexpandthefire,causingseriouslossesisnotallowed.Therefore,Ienvisagethedualpowerondieselgeneratorsetsbasedontheseason,plusapowersupply,andenableittotheirownindependentpowersupply.

Inthecaseoflowwintertemperatures,reducingthereliabilityofdieselgenerators,wewillconnectthepowerthisseason,forincreasingthe

Electricsystemreliability.Whenthetemperaturesrise,westoppedtheseasontothepowersupplydepartmentreportedthatpowersupply,youcansaverunningcosts.Andthisseasontherearethreepoweroptions:

First,quotedallthewayfromthesubstation10KVhighvoltagepowersupplyastheseason（Figure1）,theadvantageofhighreliabilitypowersupply,theshortfallisthatthehigherinvestmentininfrastructure;

secondisfromanearbyhigh-risebuildingsalong10KVtransformerhigh-voltageendofthequotedorcitedallthewaylowendoftheseasonasa380/220Vpowersupply;

thirdallthewayfromthecitynetworkcitedastheseason380/200Vpowersupply.

1.5BuildingConfigurationThinkingofdieselgeneratorsets

"

Highregulation"

fire-fightingequipmentsupplyshouldbeprovided"

forthepowerdistributionsystemdesignspecifications"

GB50052-95requirementsofthedesign,andthespecificationofaloadisespeciallyimportantinloaddidnotinvolvethefireloadintheirfirepoweraslongastheretwopowersuppliescanmeettherequirementsof"

alsorequiresaclassofhigh-risebuildingfireloadelectricityrequirementsshouldbeapowersupply,andadistributionboxofficeinthefinalautomaticswitchingdevicetoensurethatfiresafetyfacilitiesinWhenthefirepowerandreliable,abletofunctionproperly.Inthe"

isnotclearlydefinedone,second-classhigh-risebuildingsneedtoconfigurethedieselgenerators.

Thusinrecentyears,newlyemerginghigh-risebuildingfireloaddoesnotrequireallocatingadditionaldieselgenerators.However,thespecificpowersupplydesign,thevastmajorityofhigh-risebuildingsfromtheelectricitygridconnectionoftwo-waylineof10KVpowerintoelectricity,whichcannotmeetthespecificationswheretwopowersupplyrequirements.Systemblackoutcausedeitherbyaninternalfault,somecausedbypowerfailures,asaregionalpowergridinthemaingridvoltageoftheupperpartisagrid,sotheusereitherfromelectricpowerlinetotakeafewbackintothelinealsocannotbeinthestrictsenseofthetwoanindependentpowersupply,powergridfailurescancauseavarietyofallthepowerintothelineatthesametimearesultoflossofpowersupply

Blackout.Infact,theRoad10KVhighvoltagepowersupplytakenfromadifferentsubstationisverydifficult,anddieselgeneratingsetstoconfigureasmallinvestment,theuseofgoodresultsandwillcomplywithregulatoryrequirements,sothedesignofhigh-risebuildingshallbefittedwithdiesel-poweredgeneratorsets.Ithinkthatexplicitrequirementsspecificationwhichcanbehigh-risebuildingsshouldbeequippedwithdieselgenerators.

2.High-risebuildingfiredistribution

2.1commonFireDistributionProgram

Firedistributionmethodsarecommonlyusedinradiationtype,treetype,chain,fourkindsofhybrid

（1）Theradialdistributionofthefailureofanyonelinetoeachotheraffecteachother,theequipmentiseasytomanageahighsupplyreliability.However,morethanqualifyingnon-ferrousmetalsconsumedinlargequantities,switchingequipment,andmoreinvestmentinhigheroperatingcostsforasinglepieceofequipmentoflargecapacity,powersupplyreliabilityhigh.（Figure2a）

（2）Thetrunk-typedistributionwhentheroutefailure,alargersphereofinfluence,butcoupledwithalternateroutesandtoachieveswitchingtoimprovepowersupplyreliabilityforamoreuniformdistributionofplaces.（Figure2b）

（3）chainandthetrunk-typeisbasicallythesame,butthelow-reliabilitythanthetrunk,whenthemiddleofapieceofequipmentfailuresassociatedequipmentinthebac