The Low-Voltage vs High-Voltage Parallel Paradigm
Hauv vaj tse lossis me - daim ntawv thov teev,48V roj teeb systemsyog cov qauv kev lag luam. Lawv cov logic sib npaug yog qhov yooj yim: vim tias qhov hluav taws xob qis qis thiab tsis tu ncua, ntxiv cov modules ntau dua (feem ntau mus txog 15 pawg) feem ntau nce tag nrho cov peev txheej thiab tam sim no.
Txawm li cas los xij,High- roj teeb muaj zog(feem ntau 600V rau 1500V) yog tsim los ntawm stringing ntau lub hlwb nyob rau hauv series kom ua tau siab efficiency thiab qis dua kis tau tus mob. Thaum koj sim txuas cov high -voltage strings nyob rau hauv parallel, qhov nyuaj loj hlob exponentially.
Txoj Kev Hurdles ntawm HV Parallel Connection
Thawj qhov kev sib tw ntawm high-voltage parallel kev twb kev txuas yog nyob rau hauvtxoj hlua inconsistency. Sij hawm dhau mus, cov hlua roj teeb tsim muaj qhov sib txawv ntawm qhov tsis sib xws thiab Lub Xeev Tus Nqi (SoC) qib vim kev tsim khoom sib txawv lossis qhov tsis sib xws. Thaum ob txoj hlua HV nrog txawm tias qhov sib txawv ntawm 5V yog txuas nrog, txoj hlua "muaj zog" tsub tus "tsis muaj zog" ib qho ntawm tus nqi tswj tsis tau.
Tsis tas li ntawd, lubkev tiv thaivmuaj zog ntau dua. Nyob rau hauv parallel HV teeb, yog tias ib txoj hlua raug kev luv luv, lwm cov hlua sib txuas yuav muab pov tseg lawv lub zog rau hauv qhov chaw txhaum. Qhov no tsim nyog cov khoom kim heev - tawg- muaj peev xwm fuses thiab sophisticated contactors rau txhua txoj hlua. Kev tswj hwm kev sib txuas lus ntawm ntau lub Master BMS kom ntseeg tau tias kev them nyiaj synchronized thiab tso tawm kuj tseem ntxiv txheej txheej software nyuaj uas ntau cov txheej txheem tsis tau nruab.
Kev taw qhia yav tom ntej: DC / DC Hloov thiab txoj hlua -Kev Tswj Qib
Txhawm rau kov yeej cov teeb meem no, C&I cia kev lag luam tau txav mus rauhlua -theem fais fab hluav taws xob. Los ntawm kev tso ib lub converter thaum kawg ntawm txhua qhov siab -voltage hlua, lub kaw lus tuaj yeem "decouple" cov roj teeb los ntawm cov tsheb npav DC. Qhov no tso cai rau txhua txoj hlua ua haujlwm ntawm nws tus kheej, tsis hais nws qhov voltage lossis SoC.
Lwm txoj kev cog lus yog qhovmodular, decentralized invertermus kom ze. Hauv kev teeb tsa no, txhua txoj hlua roj teeb txuas nrog nws tus kheej me me - ntsuas hluav taws xob hloov hluav taws xob (PCS). Qhov no tshem tawm qhov xav tau rau siab -voltage DC paralleling tag nrho, vim tias lub zog sib xyaw ua ke ntawm AC sab. Raws li cov thev naus laus zis no paub tab, peb tuaj yeem cia siab tias C&I lub zog cia kom hloov pauv tau yooj yim dua, muaj kev nyab xeeb dua, thiab yooj yim dua los ntsuas dua qhov nruj siab -voltage architectures yav dhau los.