Hnub ci cell array: Anti-Reverse Diode thiab Bypass Diode

Nyob rau hauv lub hnub ci cell square array, lub diode yog ib qho khoom siv heev.Feem ntau siv diodes yog cov silicon rectifier diodes.Thaum xaiv, tawm ntawm cov npoo hauv qhov tshwj xeeb kom tiv thaiv kev puas tsuaj.Feem ntau, qhov thim rov qab siab tshaj qhov tawg thiab qhov siab tshaj plaws ua haujlwm tam sim no yuav tsum yog ntau tshaj ob zaug ntawm qhov siab tshaj plaws kev khiav hauj lwm voltage thiab kev khiav hauj lwm tam sim no.Diodes feem ntau muab faib ua ob pawg nyob rau hauv hnub ci photovoltaic lub zog tsim tshuab.

1. Anti-Rov qab (Anti-Backflow) Diode

Ib qho ntawm cov haujlwm ntawm covanti-reverse diodeyog tiv thaiv tam sim no ntawm lub roj teeb los ntawm lub hnub ci cell module los yog square array los ntawm kev hloov mus rau module los yog square array thaum nws tsis yog tsim hluav taws xob, uas tsis tsuas yog siv lub zog, tab sis kuj ua rau lub module los yog square array. kub los yog txawm yuav puas;Qhov thib ob muaj nuj nqi yog los tiv thaiv cov tam sim no ntws ntawm cov ceg ntawm lub square array nyob rau hauv lub roj teeb array.Qhov no yog vim hais tias cov zis voltage ntawm txhua ceg nyob rau hauv series tsis tau kiag li sib npaug zos, muaj ib txwm ib tug sib txawv ntawm qhov siab thiab tsawg voltage ntawm txhua ceg, los yog cov zis voltage ntawm ib ceg raug txo vim yog txhaum los yog duab ntxoov ntxoo shading, thiab tam sim no ntawm lub high voltage ceg yuav ntws mus rau lub low voltage ceg, los yog txawm lub output voltage ntawm tag nrho cov square array yuav raug txo.Qhov tshwm sim no tuaj yeem zam tau los ntawm kev sib txuas los tiv thaiv rov qab them diodes hauv koob hauv txhua ceg.
Nyob rau hauv kev ywj pheej photovoltaic lub zog tsim hluav taws xob, qee qhov hluav taws xob hluav taws xob photovoltaic tau txuas nrog kev tiv thaiv rov qab them diodes, uas yog, thaum tus maub los muaj qhov cuam tshuam rov qab them nyiaj, cov khoom siv tawm tsis tas yuav txuas nrog lub diode.
Lub anti-reverse diode muaj ib tug pem hauv ntej voltage poob, thiab yuav muaj ib tug tej yam hwj chim noj thaum txuas nyob rau hauv series nyob rau hauv Circuit Court.Qhov hluav taws xob poob ntawm silicon rectifier diode feem ntau siv yog li 0.7V, thiab lub raj muaj zog tuaj yeem ncav cuag 1 ~ 20.3V, tab sis nws cov hluav taws xob tiv taus thiab lub zog me me, haum rau cov ntawv siv hluav taws xob tsawg.

PV anti-reverse diodes yuav tsum muaj cov yam ntxwv hauv qab no:

1. High voltage: feem ntau yuav tsum tau tshaj 1500V, vim qhov siab tshaj photovoltaic array yuav ncav cuag los yog tshaj 1000V.

2. Kev siv hluav taws xob tsawg, uas yog, qhov kev tawm tsam (ntawm lub xeev impedance tsawg li tsawg tau, feem ntau tsawg dua 0.8 ~ 0.9V): Txij li thaum lub tshuab photovoltaic xav tau kom muaj kev ua haujlwm siab ntawm tag nrho cov kab ke, lub zog. noj cov tshuaj tiv thaiv rov qab diode hauv lub thawv sib txuas yuav tsum tsawg li tsawg tau.

3. Muaj peev xwm ua kom muaj cua sov zoo (tsis muaj thermal tsis kam thiab cov cua kub zoo yuav tsum tau): Vim tias qhov chaw ua haujlwm ntawm lub thawv photovoltaic combiner feem ntau tsis zoo, cov tshuaj tiv thaiv rov qab yuav tsum muaj lub peev xwm zoo thaum tshav kub kub dissipation, thiab feem ntau kuj xav tau. xav txog cov xwm txheej huab cua xws li Gobi thiab toj siab.

2. Bypass Diode

Thaum muaj ntau lub hnub ci hluav taws xob txuas nrog hauv series los tsim ib lub xov tooj ntawm tes los yog ib ceg ntawm ib qho square cell array, ib qho (lossis 2 ~ 3) diodes yuav tsum tau txuas nrog rov qab sib npaug ntawm qhov zoo thiab qhov tsis zoo ntawm cov khoom tso tawm ntawm txhua lub roj teeb. vaj huam sib luag.Lub diodes txuas nyob rau hauv parallel ntawm ob qho kawg ntawm cov khoom siv hu ua bypass diodes.
Kev ua haujlwm ntawm bypass diode yog los tiv thaiv ib qho kev tivthaiv nyob rau hauv cov square array los yog ib feem ntawm cov tivthaiv los ntawm kev ntxoov ntxoo los yog malfunctioning kom tsis txhob muaj hluav taws xob tsim.Ib qho kev ncaj ncees rau pem hauv ntej yuav raug tsim nyob rau ntawm ob qho kawg ntawm cov khoom siv bypass diode los ua tus diode coj.Txoj hlua ua haujlwm tam sim no hla dhau cov khoom tsis raug thiab ntws los ntawm diode, uas tsis cuam tshuam rau lub zog tsim hluav taws xob ntawm lwm cov khoom siv ib txwm muaj.Nyob rau tib lub sijhawm, nws tseem tiv thaiv cov khoom tiv thaiv bypassed los ntawm kev puas tsuaj los ntawm kev tsis ncaj ncees rau pem hauv ntej lossis cua sov vim yog "cov nyhuv kub kub".
Bypass diodes feem ntau ntsia ncaj qha rau hauv lub thawv sib txuas.Raws li lub zog ntawm cov khoom thiab cov xov tooj ntawm cov roj teeb ntawm tes, 1 mus rau 3 diodes raug teeb tsa.
Bypass diodes tsis tas yuav tsum tau nyob rau hauv txhua qhov teeb meem.Thaum cov khoom siv ib leeg los yog sib npaug, lawv tsis tas yuav txuas nrog lub diode.Rau lub sijhawm uas tus naj npawb ntawm cov khoom hauv series me me thiab qhov chaw ua haujlwm zoo, nws tseem tuaj yeem txiav txim siab tsis siv bypass diode.

Txoj cai ntawm Diode Protection Circuit

Qhov kev ua haujlwm tshaj plaws ntawm lub diode tsuas yog tso cai rau tam sim no dhau mus rau hauv ib qho kev taw qhia (hu ua rau pem hauv ntej kev tsis ncaj ncees) thiab thaiv hauv qhov kev coj rov qab (hu ua thim rov qab).

Thaum ib qho kev tsis ncaj ncees rau pem hauv ntej yog generated, kev sib nrig sib tsuj ntawm sab nraud hluav taws xob teb thiab tus kheej-tsim hluav taws xob teb tsub kom lub diffusion tam sim no ntawm cov cab kuj thiab ua rau pem hauv ntej tam sim no (uas yog, qhov ua rau ntawm hluav taws xob conduction).

Thaum qhov rov qab voltage kev tsis ncaj ncees yog tsim los, sab nraud hluav taws xob teb thiab qhov hluav taws xob tsim nws tus kheej tau ntxiv dag zog ntxiv, ua rau qhov rov qab saturation tam sim no I0 uas tsis muaj dab tsi cuam tshuam nrog qhov rov qab tsis zoo voltage nyob rau hauv qee qhov rov qab voltage ntau yam (qhov no yog vim li cas. rau non-conductivity).

Thaum muaj qhov rov qab voltage kev tsis ncaj ncees rau sab nraud, sab nraud hluav taws xob thiab qhov chaw hluav taws xob ua tus kheej tau ntxiv dag zog ntxiv, ua rau qhov rov qab saturation tam sim no I0 uas tsis muaj kev ywj pheej ntawm tus nqi hluav taws xob rov qab nyob rau hauv ib qho kev rov qab voltage ntau.