Ma cell a solar: Anti-Reverse Diode ndi Bypass Diode

M'maselo a dzuwa, diode ndi chipangizo chofala kwambiri.Ma diode omwe amagwiritsidwa ntchito kwambiri ndi ma silicon rectifier diode.Posankha, siyani malire m'mafotokozedwe kuti mupewe kuwonongeka.Nthawi zambiri, voteji yakuwonongeka kwanthawi yayitali komanso kuchuluka kwazomwe zikugwira ntchito ziyenera kupitilira kuwirikiza kawiri kuchuluka kwamagetsi ogwiritsira ntchito komanso komwe kumagwirira ntchito.Ma diode amagawidwa makamaka m'magulu awiri m'machitidwe opangira magetsi a solar photovoltaic.

1. Anti-Reverse (Anti-Backflow) Diode

Imodzi mwa ntchito zaanti-reverse diodendikuletsa batire yamakono kuchokera ku solar cell module kapena square array kuti isatembenuzidwe ku module kapena square array pamene sikupanga magetsi, omwe samangowononga mphamvu, komanso amachititsa kuti module kapena square array. kutentha kapena kuwonongeka;ntchito yachiwiri ndi kuteteza otaya panopa pakati pa nthambi za lalikulu array mu batire array.Izi ndi chifukwa linanena bungwe voteji wa nthambi iliyonse mu mndandanda sangakhale mwamtheradi ofanana, pali nthawizonse kusiyana pakati pa voteji mkulu ndi otsika. nthambi iliyonse, kapena voteji linanena bungwe la nthambi yafupika chifukwa cha vuto kapena mthunzi shading, ndipo panopa wa mkulu voteji nthambi adzayenderera kwa otsika voteji nthambi, kapena ngakhale linanena bungwe voteji wa okwana lalikulu array adzachepetsedwa.Chodabwitsa ichi chitha kupewedwa polumikiza ma anti reverse charging diode munthambi iliyonse.
Mu dongosolo lodziyimira pawokha lamphamvu la photovoltaic, madera ena owongolera ma photovoltaic adalumikizidwa ndi ma diode oletsa-reverse charger, ndiko kuti, pomwe wowongolera ali ndi ntchito yotsutsa-reverse charger, kutulutsa kwa chigawocho sikuyenera kulumikizidwa ndi diode.
Anti-reverse diode imakhala ndi kutsika kwamagetsi kutsogolo, ndipo padzakhala mphamvu yogwiritsira ntchito mphamvu ikalumikizidwa motsatizana mudera.Kutsika kwamagetsi kwa silicon rectifier diode yomwe imagwiritsidwa ntchito nthawi zambiri ndi pafupifupi 0.7V, ndipo chubu champhamvu kwambiri chimatha kufikira 1 ~ 20.3V, koma kupirira kwake ndi mphamvu yake ndi yaying'ono, yoyenera kugwiritsa ntchito mphamvu zochepa.

PV anti-reverse diode ayenera kukhala ndi izi:

1. Magetsi apamwamba: nthawi zambiri amafunika kupitirira 1500V, chifukwa chiwerengero cha photovoltaic chachikulu chidzafika kapena kupitirira 1000V.

2. Kugwiritsa ntchito mphamvu pang'ono, ndiko kuti, kutsutsa (pa-state impedance ndi yaying'ono momwe ndingathere, kawirikawiri osachepera 0.8 ~ 0.9V): Popeza dongosolo la photovoltaic liyenera kusungirako bwino kwa dongosolo lonse, mphamvu Kugwiritsa ntchito anti-reverse diode mu bokosi lophatikizira kuyenera kukhala kochepa momwe mungathere.

3. Kutentha kwabwino kwa kutentha (kutsika kwa kutentha kwapakati ndi kutentha kwabwino kumafunika): Chifukwa malo ogwirira ntchito a bokosi lophatikizira photovoltaic nthawi zambiri amakhala osauka, anti-reverse diode imayenera kukhala ndi mphamvu yabwino yothetsera kutentha, ndipo kawirikawiri imafunikanso lingalirani za nyengo monga Gobi ndi mapiri.

2. Diode yodutsa

Pakakhala ma module a cell a solar olumikizidwa motsatizana kuti apange gulu lalikulu la cell kapena nthambi yagawo lalikulu la cell, ma diode amodzi (kapena 2 ~ 3) amayenera kulumikizidwa motsatana motsatana ndi batri iliyonse. gulu.Ma diode olumikizidwa molumikizana kumapeto onse a chigawocho amatchedwa bypass diode.
Ntchito ya bypass diode ndikuletsa chigawo china mumzere wapakati kapena gawo lina la gawo kuti lisasunthike kapena lisagwire bwino ntchito kuti asiye kupanga magetsi.Kukondera kutsogolo kudzapangidwa kumapeto onse a gawo la bypass diode kuti apange diode.Chingwe chogwirira ntchito chimadutsa gawo lolakwika ndikudutsa mu diode, zomwe sizimakhudza kupanga mphamvu kwa zigawo zina zabwinobwino.Panthawi imodzimodziyo, imatetezanso gawo lodutsa kuti lisawonongeke ndi kukondera kwapamwamba kapena kutentha chifukwa cha "kutentha kwamoto".
Bypass diode nthawi zambiri imayikidwa mwachindunji mubokosi lolumikizirana.Malingana ndi mphamvu ya zigawozo ndi chiwerengero cha zingwe zamaselo a batri, ma diode 1 mpaka 3 amaikidwa.
Bypass diode safunikira muzochitika zilizonse.Pamene zigawozo zimagwiritsidwa ntchito zokha kapena zofanana, siziyenera kugwirizanitsidwa ndi diode.Nthawi zina pomwe kuchuluka kwa zigawo zingapo kumakhala kochepa komanso malo ogwirira ntchito ndi abwino, ndizothekanso kuganizira kuti musagwiritse ntchito bypass diode.

Mfundo ya Diode Protection Circuit

Ntchito yodziwika bwino ya diode ndikungolola kuti masiku ano adutse njira imodzi (yotchedwa bias) ndikutsekereza mbali yakumbuyo (yotchedwa reverse bias).

Pamene kukondera kutsogolo kwamagetsi kumapangidwa, kuponderezana kwa magetsi akunja ndi magetsi odzipangira okha kumawonjezera kufalikira kwa zonyamulira ndikuyambitsa kutsogolo (ndiko kuti, chifukwa cha magetsi).

Pamene kukondera kwa voliyumu kumapangidwa, gawo lamagetsi lakunja ndi gawo lamagetsi lodzipangira lokha limalimbikitsidwanso, ndikupanga machulukitsidwe apano a I0 omwe alibe chochita ndi reverse voltage voltage mumtundu wina wamagetsi (ichi ndichifukwa chake kwa non-conductivity).

Pakakhala kukondera kwa voteji kunja, gawo lamagetsi lakunja ndi gawo lamagetsi lodzipangira lokha limalimbikitsidwanso, ndikupanga machulukitsidwe apano a I0 omwe sali odziyimira pawokha voteji ya reverse voltage mkati mwamtundu wina wamagetsi.