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AFirst核电厂工程DOC.PY017LBN003DDS045GN110VDCPOWERSUPPLYSYSTEMCHAPTER3YA:B:C:√Issued 甲 GUANGDONGELECTRICPOWERDESIGNInternalIdentificationThisisthepropertyofGEDI.Itmustnotbeused,reproduced,transmittedordisclosedwithoutthepriorwrittenpermissionofGEDI.本文件之属于省电力设计。未获院，任何人不得擅自使用、、传递或该文件。MODIFICATIONS/REVISIONModifyA2010.02.FIRSTDESIGNBASESANDSAFETY1.1REFERENCE1.3FRENCH—French—FrenchLicensingAuthority—EDFSafety2..3．ENGINEERINGRULESAND—Referenceengineeringrulesand*FUNCTIONLOSSMADEBYRADIATIONPOLLUTIONINTHESYSTEMREDUNDANTEQUIPMENTSINTHE4.3EMERGENCYPOWERSUPPLY The2chargersaredby2different380V STS（standardtechnicalspecification）forBatterychargersSTS（standardtechnicalspecification）forbatterySTS（standardtechnicalspecification）forbatteriesdischargetest—active—passive5.2EXTERNALWHICHTHESYSTEMIS——line—pipe—turbinemissileslowmiscellaneous ne—safeshutdown——noxiousvapourorgas(otherthanthosecausedby—liquids(escafrombreaksinthepi—ionising—explosions:fromin-—specialprecautions5.3THREATSTOOTHERpipenoxiousvapourorgas(otherthanthosecausedbyionising PERIODICPERIODICPROTECTIONEQUIPMENT0LBNsystemareinstalledatthedemineralization nt(TB)buildingsupplycontrolpowertoTBbuilding.DESCRIPTIONOFTHEDCPOWERTheequipmentsfeedtheDCbusbarcompriseofabatteryandtwoForthe0LBNswitchboard,thebusbarhastwoisolators,isolator309JSdividesthebusbarintotwoseparateparts,theotherone109JSisusedtobreaktheconnectionfrombattery001BTandcharger001RDtotheload.Becausethetwochargersaretypeofhigh-frequencyswitch,theycanoperateinparallelconnectionnormallyandthecapacityofeverychargercansatisfychargingthebatteryandsupplyingtheload.For0LBNswitchboard,twochargersareisolatedfromitsownbusbarseparaybybreakers107JAand307JA.Thetwobreakersareunattached,i.e.theycanoperateinon/offaccordingtothefollowingoperatingmode:“automatic”001RDand002RDarenormalandusedtochargingthebatteryandsupplyingtheload.Thetwobreakers107JAand307JAareclosed.001RDisnormalandusedtochargingthebatteryandsupplyingtheload,002RDisThe107JAbreakerisclosed,the307JAbreakeris001RDisshutdown,002RDisnormalandusedtochargingthebatteryandsupplyingtheThe107JAbreakerisopened,the307JAbreakeris“boost”-001RDisusedboostingcharge.002RDsupplytheload.Thetwobreakers107and307areclosed.Theisolator109JSisopened.Eachchargerisabletoprovideaumcurrentthatloadsneed,keepsthebatteryoutputvoltageandsatisfiestheneedofbatteryrecharging.Batteriesdonotfeedloadundernormaloperation,exceptloadsuptoitspeakWhenthebatteriesprovidepoweronitsown,forexample,thechargeroritspowersupplyfails,itsemergencydischargingtimemustbelongerthanonehouranditsoutputvoltagemusthigherthan93.6Vwithintheemergencydischargingtime.Chargers001RDand002RDarefedbytwodifferent380Vswitchboardswhichfedbytwodifferent6.6kVsiteswitchboards.Switchboardsof0LBNsystemarefedbythebatteriesandchargerswithoutgoingAlayoutunitinswitchboardisforbatterydischargingEarthfaultsofbusbarsandfeedersaredetectedandalarmedbytheinsulationmonitorconnectedtobusbarBandC.Oneswitchboardoutgoingunitisfortheannualbatterydischargetestequipment.Short-circuitfailuresareeliminatedselectively. TheequipmentisnotdesignedtobeearthquakeCHOICEOFMATERIAL,Theequipmentconstructionrulesshallbeobservedinorderto nel ventedlead-acidspray-prooftype.Thecellconsistsoftubularpositivepasted tes,separatorswithspaces,transparentsticcontainerandnon-transparentThecellisprovidedwithacidspray-prooffunnelplug.Althoughtherewillbesomegasevolvedduringtheoperation,thereisnoacidsprayescaoutofthecellssoastoprotecttheequipmentintheroomfromcorrosionandimprovetheoperationcondition.Withthefunnelplug,thepossibleexplosionduetothesparksorflameoutsidethecellcanbeeliminated,soit’ssafeinoperation.Thebatterystandsareconstructedofsteelprotectedbyappropriatestainlesstreatment.Therackscanbefixedonthecementbasegroundwithexpansionboltsorbuilt-inanchorbolts.ChargerandDistributionChargeranddistributionboardareadaptedtoreceiveallcablesthroughtheEachchargerismountedinacubiclewhich,togetherwiththedistributionboard,formsacompletesuiteofpanels.Thecubiclesareofanassemble