Daim phiaj txuas txuas inverters feem ntau muab faib ua photovoltaic kab sib txuas inverters, cua zog daim phiaj txuas nrog inverters, cov khoom siv hluav taws xob txuas nrog inverter thiab lwm yam khoom siv hluav taws xob tsim hluav taws xob sib txuas nrog inverter.
Vim muaj ntau haiv neeg ntawm vaj tse, nws yog khi ua rau muaj ntau haiv neeg ntawm lub hnub ci vaj huam sib luag installation. Txhawm rau ua kom muaj txiaj ntsig zoo tshaj plaws ntawm kev hloov pauv ntawm lub hnub ci zog thiab coj mus rau hauv tus account qhov zoo nkauj ntawm cov tsev, nws yuav tsum muaj kev sib txawv ntawm peb cov inverters kom paub txog txoj hauv kev zoo tshaj plaws ntawm hnub ci zog hloov dua siab tshiab. Tam sim no, cov txheej txheem hnub ci inverter hauv ntiaj teb yog: centralized inverter, series inverter, multi series inverter thiab module inverter.
Centralized inverter
The centralized inverter is generally used in the system of large-scale photovoltaic power station (>10 kW). Ntau cov hlua photovoltaic txuas nrog rau DC cov tswv yim ntawm tib lub hauv nruab nrab inverter. Feem ntau, lub siab -hwj chim siv peb-theem IGBT fais fab module, qis- fais fab siv teb cov nyhuv transistor, thiab siv DSP hloov dua siab tshiab maub los los txhim kho qhov zoo ntawm lub zog tsim, Ua kom nws ze heev rau sine wave tam sim no. Qhov loj tshaj feature yog lub zog siab thiab tus nqi qis ntawm qhov system. Txawm li cas los xij, vim qhov sib txuam ntawm cov hlua photovoltaic thiab ib nrab shading, qhov ua tau zoo thiab hluav taws xob muaj peev xwm ntawm tag nrho cov tshuab photovoltaic raug txo. Nyob rau tib lub sijhawm, lub zog tsim kev ntseeg tau ntawm tag nrho cov txheej txheem photovoltaic cuam tshuam los ntawm kev ua haujlwm tsis zoo ntawm pawg photovoltaic unit. Qhov kev tshawb fawb tshiab tshaj plaws yog siv qhov chaw vector tswj kev tswj hwm thiab tsim kho tshiab inverter topology kev sib txuas kom tau txais kev ua haujlwm siab nyob rau hauv ib nrab load.
Series inverter
Series inverter tau dhau los ua cov inverter nrov tshaj plaws hauv kev lag luam thoob ntiaj teb. Lub series inverter yog raws li lub tswv yim modular. Txhua photovoltaic series (1kw-5kw) dhau los ntawm inverter, muaj lub zog siab tshaj plaws taug qab ntawm DC kawg, thiab txuas nrog rau kab sib npaug ntawm AC kawg. Ntau qhov loj photovoltaic fais fab nroj tsuag siv series inverter. Qhov kom zoo dua yog tias nws tsis cuam tshuam los ntawm qhov sib txawv ntawm qhov module thiab shading ntawm cov hlua, thiab txo qhov tsis sib haum ntawm qhov pom ntawm qhov zoo ntawm photovoltaic module thiab inverter, thiaj li ua kom lub zog tsim. Cov kev ua tau zoo no tsis tsuas yog txo cov nqi hluav taws xob, tab sis kuj nce kev ntseeg siab ntawm qhov system. Nyob rau tib lub sijhawm, lub tswv yim ntawm "tus tswv- qhev" tau qhia nyob nruab nrab ntawm cov hlua, yog li thaum lub kaw lus tsis tuaj yeem ua rau ib qho inverter ua haujlwm nrog ib txoj hlua hluav taws xob, ob peb pawg ntawm cov hlua photovoltaic tuaj yeem ua tau. txuas ua ke los ua ib qho los yog ob peb ntawm lawv ua haujlwm, thiaj li tsim tau hluav taws xob ntau dua. Lub tswv yim tseeb yog tias ob peb lub inverters tsim "pab pawg" los hloov "tus tswv- qhev" lub tswv yim, uas ntxiv txhim kho kev ntseeg siab ntawm lub system. Tam sim no, transformerless series inverter tau nyob hauv txoj haujlwm tseem ceeb.
Multi-txheej inverter
Multi series inverter siv qhov zoo ntawm centralized inverter thiab series inverter, zam nws qhov tsis zoo, thiab tuaj yeem siv rau ntau txhiab watt photovoltaic fais fab chaw nres tsheb. Multi-series inverter muaj xws li sib txawv ntawm ib tus neeg lub zog ncov nrhiav thiab DC rau DC converter. Cov DC no tau hloov mus rau hauv AC los ntawm ib qho zoo tib yam DC rau AC inverter thiab txuas nrog rau daim phiaj fais fab. Cov nqi sib txawv ntawm cov hlua hluav taws xob photovoltaic (xws li lub zog sib txawv, cov lej sib txawv ntawm ib txoj hlua, cov tuam txhab sib txawv ntawm cov qauv, thiab lwm yam), photovoltaic modules ntawm ntau qhov sib txawv lossis cov thev naus laus zis, cov hlua sib txawv (xws li East, South thiab West) , sib txawv inclination ces kaum los yog duab ntxoov ntxoo tuaj yeem txuas nrog ib qho inverter, tib lub sijhawm, txhua txoj hlua ua haujlwm ntawm lawv qhov siab tshaj plaws lub zog siab.
Nyob rau tib lub sijhawm, qhov ntev ntawm DC cable raug txo kom txo qis cov nyhuv shading ntawm cov hlua thiab qhov poob los ntawm qhov sib txawv ntawm cov hlua.
Modular inverter
Module inverter yog txuas rau txhua qhov photovoltaic module nrog lub inverter, thiab txhua lub module muaj qhov sib cais siab tshaj plaws lub zog siab tshaj plaws taug qab, kom kev koom tes ntawm module thiab inverter zoo dua. Nws feem ntau yog siv nyob rau hauv 50W rau 400W photovoltaic fais fab chaw nres tsheb, thiab tag nrho cov efficiency yog qis dua li ntawm series inverter. Vim hais tias nws yog kev cob cog rua nyob rau hauv parallel ntawm AC sab, nws tsub kom lub complexity ntawm kev sib txuas ntawm AC sab thiab yog ib qho nyuaj rau tswj. Lwm qhov teeb meem uas yuav tsum tau daws yog yuav ua li cas txuas rau daim phiaj hluav taws xob zoo dua. Txoj hauv kev yooj yim yog txuas mus rau daim phiaj ncaj qha los ntawm cov khoom siv AC zoo tib yam, uas tuaj yeem txo cov nqi thiab cov khoom siv. Txawm li cas los xij, cov qauv kev nyab xeeb ntawm cov phiaj xwm hauv zos yuav tsis tso cai rau qhov no. Cov tuam txhab hluav taws xob tuaj yeem tawm tsam qhov kev sib txuas ncaj qha ntawm cov cuab yeej tsim hluav taws xob rau cov khoom siv hluav taws xob zoo tib yam ntawm cov neeg siv hauv tsev. Lwm qhov kev nyab xeeb ntsig txog yog seb puas hloov pauv hloov pauv (ntau zaus lossis tsawg zaus) yuav tsum tau lossis seb qhov hloov pauv tsis pub dawb inverter tau tso cai. Qhov no inverter yog feem ntau dav siv nyob rau hauv iav kab hlau rhuav hnub ci daim phiaj txuas inverter thiab photovoltaic daim phiaj txuas inverter phab ntsa.
