Micro-Inverter Nrog Hnub Ci Vaj Huam Sib Luag Rau Lub Tsev Zog Cia System

Ntxiv rau qhov nruab nrab thiab cov hlua inverters, cov tshuab hluav taws xob tshiab kuj suav nrog micro-inverters, uas yooj yim rau nruab thiab hloov tau yooj yim. Raws li lub npe qhia, micro-inverters muaj kev siv hluav taws xob tsawg thiab yog li feem ntau txuas nrog tsuas yog ib lossis ob peb lub hnub ci vaj huam sib luag. Raws li ib qho inverter, micro-inverter hloov qhov qis-voltage DC fais fab los ntawm photovoltaic vaj huam sib luag rau hauv AC fais fab rau lub zog hauv zos. Thaum qhov hluav taws xob ntawm lub vaj huam sib luag photovoltaic feem ntau nyob ib puag ncig 50V, AC daim phiaj hluav taws xob tuaj yeem ncav cuag ntau pua volts. Qhov no high voltage-rau- piv tam sim no ua rau qhov kev xav tau siab ntawm lub converter qhov nce. Siv cov khoom siv tsis zoo - cais PWM converter nyob rau hauv qhov xwm txheej no yuav ua rau muaj kev ua haujlwm siab lossis qis qis rau cov keyboards, uas ua rau kev hloov pauv tsis zoo thiab kev ntxhov siab tseem ceeb ntawm cov khoom siv fais fab. Lawm, sib txuas cov inductor los yog transformer rau hauv lub converter kom ua tiav qhov voltage sib piv los ntawm kev hloov pauv tau dhau los ua kev daws teeb meem rau micro-inverters.

Ua haujlwm tau zoo, micro-inverter yuav tsum muab peb lub luag haujlwm: kaw nrawm (RSD), qhov siab tshaj plaws lub zog taw qhia (MPPT), thiab inversion. RSD tau thov nyob rau ntawm NEC lub rooj sib tham hauv 2014. Nws lub hom phiaj yog kom tshem tawm cov hluav taws xob photovoltaic sai sai ntawm DC tsheb npav thaum muaj hluav taws kub lossis lwm yam kev puas tsuaj, ua kom muaj kev nyab xeeb ntawm cov neeg tua hluav taws. MPPT yog qhov zoo-paub rau cov neeg nyob hauv kev lag luam photovoltaic thiab tau qhia hauv cov lus dhau los. Txawm li cas los xij, tsis zoo li cov kab ke hauv nruab nrab lossis txoj hlua MPPT, qhov kev ua haujlwm no hauv microinverters tsis tas yuav tsum muaj lub zog txhawb zog; Lwm yam circuits, xws li phaw, puv -bridge, thiab flyback, kuj siv tau. Qhov no feem ntau yog vim muaj ntau haiv neeg ntawm downstream circuitry.

Micro-inverter yog ib qho me me inverter ntaus ntawv ntsia ncaj qha tom qab ib qho lossis ib qho me me ntawm cov hluav taws xob photovoltaic, hloov lub vaj huam sib luag lub zog DC rau hauv daim phiaj- txuas AC fais fab. Nws qhov txiaj ntsig tseem ceeb yog nyob rau hauv nws txoj kev ywj pheej MPPT (Maximum Power Point Tracking) muaj nuj nqi rau txhua lub vaj huam sib luag, ua kom lub zog loj tshaj plaws thaum muaj qhov tsis sib xws ntawm cov vaj huam sib luag lossis ib nrab shading. Nws kuj txwv qhov system DC voltage mus rau theem qis<60 V, reducing the risk of fire and electric shock.

Hais txog cov qauv hauv Circuit Court, micro-inverters tau hloov zuj zus los ntawm ntau-theem mus rau ob-theem thiab tom qab ntawd mus rau ib zaug-theem [1]. Thaum cov hluav taws xob tso tawm los ntawm photovoltaic panels thiab txuas nrog nyob rau hauv parallel mus rau AC daim phiaj, tsawg dua cov theem hloov dua siab tshiab, qhov ua tau zoo dua. Multi-theem lossis ob-theem micro-inverter. Nws muaj lub pem hauv ntej -theem DC/DC thiab lub nram qab -theem DC/AC. Pem hauv ntej-theem DC/DC muaj MPPT thiab txhawb zog, tsa qhov hluav taws xob mus rau DC lub tsheb npav voltage xav tau rau inversion, thiab lub nram qab-theem DC/AC yog inverted thiab txuas rau daim phiaj.

Ob-theem microinverters tau muab faib ua ob hom: qhov hluav taws xob thiab qhov tam sim no. Lub hom phiaj voltage tswj cov zis voltage ntawm AC sab. Cov zis ntawm DC / DC theem ua ntej yog qhov ruaj khov DC voltage. Nrog rau hom microinverter no, tom qab DC / AC theem ua haujlwm ntawm qhov siab. Thawj qhov kev hloov pauv ntawm qhov tam sim no hom microinverter yog tam sim no. Nws DC sab tso zis tsis yog ib qho ruaj khov DC, tab sis yog "steamed bun yoj" nrog AC tivthaiv, raws li qhia hauv daim duab 4. Lub zog zaus zaus polarity hloov dua siab tshiab Circuit Court cais no steamed bun yoj mus rau qhov zoo thiab tsis zoo outputs, tsim ib daim phiaj - txuas sine yoj. Piv rau voltage-hom microinverters, qhov tam sim no hom microinverter muaj cov cuab yeej hluav taws xob qis dua thiab cov qauv yooj yim thiab tswj, ua rau nws siv dav hauv cov qauv microinverter tam sim no.

Ob qhov hluav taws xob-qhov chaw thiab tam sim no- qhov chaw microinverters muaj DC / AC Circuit Court, tab sis tam sim no - hom yuav tsum muaj lub zog - zaus Circuit Court, thaum qhov hluav taws xob - hom yuav tsum muaj siab - zaus hloov. Lub unfolding Circuit Court muaj ib tug yooj yim qauv, nrog rau MOSFET kev khiav hauj lwm ntawm lub hwj chim zaus, thiab cov thawj losses yog conduction losses . 600V-950V CoolMOS™ P7 thiab txawm 1200V IGBTs yog haum rau daim ntawv thov no. Ib tug tag nrho-bridge circuit yog ib tug raug voltage- qhov chaw inverter, nrog rau ib ceg ua hauj lwm ntawm lub hwj chim zaus thiab lwm yam switching ntawm high zaus los txo cov zis voltage harmonics. Kev tsim kho kom zoo ib txwm muaj kev xaiv MOSFETs sib txawv rau ob txhais ceg raws li kev ua haujlwm, tab sis muaj ntau yam ntawm 600V-950V CoolMOS™ P7s kuj muaj. Raws li tuaj yeem pom los ntawm topology, lub voj voog nthuav tawm tau txwv tsis pub siv hluav taws xob muaj peev xwm them nyiaj vim yog cov yam ntxwv ntawm cov cuab yeej. Tag nrho-bridge inverter Circuit Court tuaj yeem ua haujlwm bidirectionally, muab kev pabcuam hluav taws xob muaj peev xwm txaus, tab sis yuav tsum muaj LCL lim ntxiv.