2023學(xué)年完整公開(kāi)課版Powerlinedesign

DesignandbudgetofmobilecommunicationengineeringPowerlinedesignCourseteam:XiaojiZhaoXuelianFangYueqiuDongLiuYang

SHENZHENPOLYTECHNICContents

1Statusofpowerlinedesign

2Modelandclassificationofpowerline

3Theoreticalbasisofpowerlinedesign

4DesigntheoryofDCpowerline

5DesigntheoryofACpowerline

6Exampleofpowerlinedesign1.

StatusofpowerlinedesignPowerconsumptionstatisticsofbasestationequipmentP=UICalculationandselectionofbatterycapacitySwitchCapacitycalculationandselectionofswitchingpowersupplyrectifiermodule220vCapacitycalculationandselectionofACdistributionboxCapacitycalculationandselectionoftransformerCapacitycalculationandselectionofDieselgeneratorPowerlineconfigurationoilwire2.

ModelandclassificationofpowerlinePowerlineElectricpowercableInsulatedwireBusbarLargesectionalarea、multiplepowerlinetogether、moreusedforACpowersupply;Classification:singlesheathwithstandvoltage600V、doublesheathwithstandvoltage1000VSeriescodeInsulationSheathmaterialcodeOutersheathPerformancecharacteristiccodeModelZR-RVRVVCablecolor:ACcable：single-phase—threecoreortwosinglecorecable；three-phase—fourcorecable，yellow、green、red、blue（orblack）。Yellow、greenandredexpressedasA、B

andCphase；DCcable：black、blue。black：positive;blue：negative;2.

Modelandclassificationofpowerline3.

TheoreticalbasisofpowerlinedesignTheselectionofpowerlinesshouldpayattentiontothefollowingpoints:TheoutletofhighvoltagecabinetandACinletoflowvoltagedistributionequipmentarecalculatedaccordingtoforwardload，outletoflowvoltagedistributionequipmentiscalculatedaccordingtoloadsupply;Modelandspecificationofoutputwireofgeneratorset—outputcapacity；-48V，voltagedrop3.2V；ThesectionalareaofACneutrallineandphaselineisequal;Coppercorelineshouldbeusedforgroundingwire;。ACandDCwire：flameretardantcable；Voltage

dropdistributionBATTDCcabinetPowercabinetDevices0.250.50.8-1.10.50.251.1-0.8Fixedvoltagedropdistributionmethod＋currentmomentmethod：accordingtovoltagedrop；Whenthecertainsectionvoltagedropisdetermined，thecablesectionalarea：

1.Powerconsumptionstatistics—totalcurrentofDCequipmentI2.

ChoosecablemediumCu：57，Al：343.

DCcablelengthL4.maximumallowancevoltagedropU=3.2V5

.calculatecrosssectionareaofDCcableS5

.selecttherightpowerline4.

DesigntheoryofDCpowerlineＳ：cablecross-sectionalarea（m㎡）；

Ｉ：maximumworkingcurrent（Ａ）；ρ：electricalconductivity（Cu：57，Al：34）；

Ｕ：maximumallowancevoltagedrop（Ｖ）；L：cablelength（m）Therelationshipbetweenthesafecurrentcarryingcapacityoftheconductorandthemeltratedcurrentofthefusecanbeusedasreference：Lightingandairconditioningline：safecurrentcarryingcapacityislarger；Powerline：（1.5～1.8）×safecurrentcarryingcapacityislarger；Lineinexplosionriskarea：0.8×safecurrentcarryingcapacityislarger。safecurrentcarryingcapacity：Long-termpossiblemaximumload；Whenselectingthespecificationsofmainandbranchpowerline,itcanfloat50%-80%onthebasisofcurrentloadpower；5.

DesigntheoryofACpowerlineSinglephaseThreephaseCrosssectionalSinglephaseThreephaseCrosssectionalSinglephaseACpower：permissiblecurrentcarryingcapacityofeachlineofelectricalequipment

isThreephaseACpower：permissiblecurrentcarryingcapacityofeachlineofelectricalequipmentis

Ｐ：powerofelectricalequipment cosφ：powerfactorofelectricalequipment，generally0.855.

DesigntheoryofACpowerlineOne-stepdesignofpowersupplyinstallationformetropolitanareanetworkmachineroom：fifthfloor、rentalroom；themapisthecableroutingmapofthemachineroom。

“１”:integratedpowersupply；“２”：batterypackＧＦＭ－２００；ACpower:fromthepowersupplyofpropertycompanytotheACboxofthemachineroom;ACpowerline：threephasepowerline；

6.

ExampleofpowerlinedesignCableroutingmapACdistributionbox6.

ExampleofpowerlinedesignListofcablemodelsStartEndCablemodelIntegratedpowersupplyACboxVV22ZR-3×10+1×6ACboxIntegratedpowersupplyVV22ZR-3×10+1×6ACboxAirconditioningsocketRVVZ-4V×4ACboxLightingtubeRRVZ-2.5ACboxSocketRRVZ-3×2.5IntegratedpowersupplyBatteryRRVZ-95ACboxIntegratedgroundingRRVZ-35IntegratedpowersupplyIntegratedgroundingRRVZ-9