Úvod
Thebatterypackisanindependentandreliableoperatingpowersource.ItisnotaffectedbytheACpowersource.Itcanstillensurecontinuousandreliableoperationeveninthecaseofapoweroutageandabusbarshort-circuitinthewholeplant..
Thebatteryvoltageisstableandthecapacityislarge.Itisnotonlysuitableforvariousmorecomplicatedrelayprotectionandautomaticdevices,butalsosuitableforthetransmissionofvariouscircuitbreakers.Therefore,large-scaleenterprisesubstationsusuallyusebatterypacksItisusedastheoperatingpowersupply,buttheoperatingpowersupplyofthebatterypackrequiresmanyauxiliaryequipmentandspecialrooms.Theinvestmentislarge,thelifeisshort,theconstructiontimeislong,theoperationiscomplicated,andthemaintenanceworkloadislarge.Therefore,thebatterypackisgenerallynotusedastheoperatingpowersupplyinsmallandmedium-sizedsubstations.,AndmostlyuserectifiedDCoperationpowersupplyorACoperationpowersupply.
Jak funguje bateriový balíček
Batterypackshavecharging,dischargingandfloatingchargingmodes,andthefloatingchargingmodeisusuallyadopted.Becausethefloatingchargecurrentnotonlycompensatesfortheself-dischargelossofthebatterypack,butalsocancarryapartoftheDCload,sothatthebatterypackisalwaysinafullychargedstate,andonlyatthemomentofclosingcanthebatterypackprovidealargecurrent.Thisworkingmethoddoesnotrequirefrequentcharginganddischarging,prolongstheservicelifeofthebattery,andreducestheworkloadofoperationandmaintenance,soitiswidelyused.
Instalacebaterie
Theinstallationpositionofthebatteryofthesmallphotovoltaicpowergenerationsystemshouldbeascloseaspossibletothesolarcellandthecontroller;TheinvertersandACpowerdistributioncabinetsaredividedintoseparaterooms.Theinstallationlocationshouldensuregoodventilation,convenientdrainage,andpreventhightemperature.Theambienttemperatureshouldbekeptbetween10~25℃asfaraspossible.
Insulationmeasuresshouldbetakenbetweenthebatteryandtheground,andwoodenboardsorotherinsulatorsshouldbeusedtopreventthebatteryfromshort-circuitingthegroundanddischarging.Iftherearealargenumberofbatteries,theycanbeinstalledonadedicatedbatterysupport,andthesupportmustbegroundedreliably.
Afterthebatteryisinstalled,thetotalvoltageofthebatteryandthevoltageofasinglebatteryshouldbemeasured,andthevoltageofthesinglebatteryshouldbeequal.Whenwiring,distinguishthepositiveandnegativepolestoensurethequalityofthewiring.
Thebatterypoleandthewiringmustbeinclosecontact,andalayerofpetroleumjellyoilfilmshouldbeappliedtothepoleandtheconnectionpointtopreventcorrosionandrustfromcausingpoorcontact.
Rolebaterie
Rolebaterieistostoretheelectricalenergygeneratedbythesolarcellarraywhenexposedtolightandtosupplypowertotheloadatanytime.Thebasicrequirementsofthesolarcellpowergenerationsystemforthebatterypackusedare:
①Nízké samovybíjení;
②Dlouhá životnost;
③Silné hluboké vybití;
④Vysoká účinnost nabíjení;
⑤Nízká údržba nebo bezúdržbová;
⑥Široký rozsah provozních teplot;
⑦ Nízká cena.
Currently,thebatteriesusedinmycountry'ssolarcellpowergenerationsystemaremainlylead-acidbatteriesandcadmium-nickelbatteries.Forlead-acidbatteriesabove200Ah,fixedorindustrialsealedmaintenance-freelead-acidbatteriesaregenerallyused;forlead-acidbatteriesbelow200Ah,small-sizedsealedmaintenance-freelead-acidbatteriesaregenerallyused.