Qhov hluav taws xob ntawm DC sab ntawm lub hnub ci zog yog nce mus rau 1500V, thiab kev nce qib thiab kev siv ntawm 210 hlwb tso rau pem hauv ntej cov kev xav tau ntau dua rau kev nyab xeeb hluav taws xob ntawm tag nrho photovoltaic system.Tom qab qhov system voltage nce, nws ua rau muaj kev sib tw rau lub rwb thaiv tsev thiab kev nyab xeeb ntawm lub kaw lus, thiab ua rau muaj kev pheej hmoo ntawm kev puas tsuaj ntawm cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, thiab cov khoom siv hluav taws xob sab hauv. Cov kev txhaum tshwm sim.
Yuav kom ua tau raws li cov khoom siv nrog cov khoom siv tam sim no, inverter manufacturers nce cov tswv yim tam sim no ntawm txoj hlua los ntawm 15A mus rau 20A.Thaum daws qhov teeb meem ntawm 20A cov tswv yim tam sim no, cov chaw tsim khoom siv inverter optimized tsim sab hauv ntawm MPPT thiab txuas ntxiv txoj hlua nkag tau ntawm MPPT rau peb lossis ntau dua.Thaum muaj kev txhaum, txoj hlua yuav muaj teeb meem ntawm kev noj qab haus huv tam sim no.Txhawm rau daws qhov teeb meem no, DC hloov nrog lub luag haujlwm ntawm "ntse DC kaw" tau tshwm sim raws li lub sijhawm xav tau.
01 Qhov sib txawv ntawm ib txwm cais hloov pauv thiab ntse DC hloov
Ua ntej tshaj plaws, cov tsoos DC rho tawm hloov pauv tuaj yeem tawg hauv qhov ntsuas tam sim no, xws li nominal 15A, tom qab ntawd nws tuaj yeem rhuav tshem tam sim no nyob rau hauv qhov ntsuas hluav taws xob ntawm 15A thiab nyob rau hauv.Txawm tias cov chaw tsim khoom yuav kos lub peev xwm tshaj tawm ntawm kev sib cais. , feem ntau nws tsis tuaj yeem tawg qhov luv-circuit tam sim no.
Qhov sib txawv loj tshaj plaws ntawm kev sib cais thiab lub voj voog hluav taws xob yog qhov hluav taws xob hluav taws xob muaj peev xwm ua rau lub voj voog luv luv, thiab qhov luv-circuit tam sim no nyob rau hauv qhov kev tshwm sim ntawm qhov txhaum yog ntau dua li qhov ntsuas tam sim no ntawm Circuit Court breaker. ;Txij li qhov luv luv tam sim no ntawm photovoltaic DC sab feem ntau yog kwv yees li 1.2 npaug ntawm qhov ntsuas tam sim no, qee qhov kev sib cais los yog cov khoom siv thauj khoom tuaj yeem cuam tshuam qhov luv luv tam sim no ntawm DC sab.
Tam sim no, lub ntse DC hloov siv los ntawm lub inverter, ntxiv rau ua kom tau raws li IEC60947-3 daim ntawv pov thawj, kuj ua tau raws li lub peev xwm overcurrent tawg ntawm ib lub peev xwm, uas tuaj yeem ua txhaum lub overcurrent txhaum nyob rau hauv lub nominal luv luv Circuit Court tam sim no, ua tau zoo. daws qhov teeb meem ntawm txoj hlua tam sim no backfeeding.Nyob rau tib lub sijhawm, lub ntse DC hloov pauv tau ua ke nrog DSP ntawm lub inverter, kom lub chaw mus ncig ntawm qhov hloov pauv tuaj yeem raug thiab sai sai paub cov haujlwm xws li kev tiv thaiv overcurrent thiab kev tiv thaiv luv luv.
Hluav taws xob schematic daim duab ntawm ntse DC hloov
02 Tus qauv tsim lub hnub ci yuav tsum tau hais tias thaum tus naj npawb ntawm cov tswv yim ntawm cov hlua nyob rau hauv txhua MPPT yog ≥3, fuse tiv thaiv yuav tsum tau teeb tsa ntawm DC sab.Qhov zoo ntawm kev siv cov hlua inverters yog kev siv tsis muaj fuse tsim los txo. kev ua haujlwm thiab kev saib xyuas kev ua haujlwm ntawm kev hloov cov fuses ntawm DC sab.Inverters siv ntse DC keyboards es tsis txhob fuses.MPPT tuaj yeem nkag 3 pawg ntawm cov hlua.Nyob rau hauv cov xwm txheej phem heev, yuav muaj kev pheej hmoo tias tam sim no ntawm 2 pawg ntawm cov hlua yuav ntws rov qab mus rau 1 pawg ntawm cov hlua.Lub sijhawm no, qhov hloov pauv DC ntse yuav qhib qhov hloov DC los ntawm kev tso tawm shunt thiab txiav nws raws sijhawm.Circuit Court kom tshem tawm sai sai ntawm kev ua txhaum.
Schematic daim duab ntawm MPPT txoj hlua tam sim no rov qab pub mis
Lub shunt tso tawm yog qhov tseem ceeb ntawm tripping coil ntxiv rau cov khoom siv tripping, uas siv lub zog tshwj xeeb rau shunt tripping coil, thiab los ntawm kev ua xws li electromagnetic rub-in, DC hloov actuator yog tripped qhib lub nres, thiab shunt tripping Nws Feem ntau siv nyob rau hauv tej thaj chaw deb tsis siv neeg lub hwj chim-tawm tswj.Thaum lub ntse DC hloov yog configured ntawm lub GoodWe inverter, lub DC hloov yuav tsum tripped thiab qhib los ntawm lub inverter DSP mus disconnect lub DC hloov Circuit Court.
Rau inverters siv lub shunt mus ncig teb chaws kev tiv thaiv muaj nuj nqi, nws yog ib qho tsim nyog yuav tsum tau ua ntej kom ntseeg tau tias cov tswj Circuit Court ntawm shunt coil tau txais kev tswj fais fab ua ntej kev tiv thaiv kev ua haujlwm ntawm lub ntsiab Circuit Court tuaj yeem lav.
03 Daim ntawv thov kev cia siab ntawm kev txawj ntse DC hloov
Raws li kev nyab xeeb ntawm photovoltaic DC sab yog maj mam tau txais kev saib xyuas ntxiv, kev nyab xeeb xws li AFCI thiab RSD tau hais ntau dua thiab tsis ntev los no.Smart DC hloov yog qhov tseem ceeb sib npaug.Thaum muaj teeb meem tshwm sim, lub ntse DC hloov tuaj yeem siv tau cov chaw taws teeb tswj thiab kev tswj xyuas tag nrho ntawm lub ntse hloov.Tom qab AFCI lossis RSD qhov kev nqis tes ua, DSP yuav xa cov teeb liab mus rau DC DC rho tawm mus.Tsim ib lub ntsiab lus meej meej kom muaj kev nyab xeeb ntawm cov neeg ua haujlwm tu.Thaum lub DC hloov hluav taws xob tawg loj, nws yuav cuam tshuam rau lub neej hluav taws xob ntawm qhov hloov.Thaum siv qhov hloov pauv DC ntse, qhov tawg tsuas yog siv lub neej txhua yam ntawm DC hloov, uas muaj txiaj ntsig tiv thaiv lub neej hluav taws xob thiab lub peev xwm tua hluav taws xob ntawm DC hloov.
Daim ntawv thov ntawm cov ntse DC keyboards kuj ua rau nws muaj peev xwm ntseeg tau "ib qho tseem ceeb kaw" ntawm cov khoom siv inverter hauv tsev neeg; Qhov thib ob, los ntawm kev tsim DSP tswj kev kaw, thaum muaj xwm txheej ceev, DC hloov ntawm inverter tuaj yeem ua tau sai thiab raug kaw los ntawm DSP teeb liab, tsim ib qho kev txhim khu kev qha txij nkawm disconnection point.
04 Cov ntsiab lus
Daim ntawv thov ntawm cov ntse DC keyboards feem ntau daws cov teeb meem kev tiv thaiv kev noj qab haus huv tam sim no, tab sis seb qhov kev ua haujlwm ntawm cov chaw taws teeb tuaj yeem siv rau lwm qhov kev faib tawm thiab tsev neeg los tsim kev lag luam txhim khu kev qha thiab kev saib xyuas thiab txhim kho cov neeg siv kev nyab xeeb thaum muaj xwm txheej ceev.Lub peev xwm los daws qhov yuam kev tseem xav tau daim ntawv thov thiab kev txheeb xyuas cov ntse DC keyboards hauv kev lag luam.
Post lub sij hawm: Feb-16-2023