Kusankha Cholumikizira Choyenera cha Dongosolo la Mphamvu ya Dzuwa
Mu makina amphamvu a dzuwa, zolumikizira nthawi zambiri zimaonedwa ngati zinthu zazing'ono zomwe zimangolumikizana. Komabe, ubwino ndi kuyenerera kwa zolumikizira ndizofunikira kwambiri pakugwira ntchito bwino, kugwira ntchito bwino, komanso, pomaliza pake, chitetezo cha kukhazikitsa. Zolumikizira zoyenera zimachepetsa kutayika kwa magetsi, zimaletsa malo otentha, zimachepetsa chiopsezo cha ma circuit afupi, komanso zimapangitsa kuti kukonza ndi kukulitsa makina kukhale kosavuta. Nkhaniyi ikukambirana mfundo zazikulu posankha zolumikizira zamagetsi amagetsi a dzuwa, zonse zomangira nyumba ndi zamalonda.
1. Kumvetsetsa ntchito ya zolumikizira mu makina a PV
Dongosolo la PV (photovoltaic) limapangidwa ndi ma solar panels, ma DC cables, ma junction box, ma inverter, chitetezo (ma MCB, ma fuse, ma SPD), ndi ma mechanical structures. Ma connectors amapezeka pamalo osiyanasiyana: pakati pa ma panels (serial/parallel), olumikizana ndi combiner box, ndi olumikizana ndi inverter. Ma connectors kapena ma terminals amapezekanso kumbali ya AC, ngakhale kuti zizindikiro zawo zowopsa zimasiyana ndi zomwe zili kumbali ya DC.
Zomwe nthawi zambiri zimanyalanyazidwa: Mphamvu yamagetsi ya DC pamagetsi okwera (monga zingwe za VDC 600–1000) ndi "yovuta kuzimitsa" chifukwa imatha kusunga arc pamene kulumikizana kuli kosasunthika kapena kosagwirizana. Chifukwa chake, zolumikizira za PV zimapangidwa ndi zipangizo, njira zotsekera, komanso kukana nyengo komwe kungagwiritsidwe ntchito panja kwa nthawi yayitali.
2. Mitundu yodziwika bwino ya zolumikizira zamagetsi a dzuwa
a) Cholumikizira cha mtundu wa MC4 ndi momwe chikugwirizana nacho
Cholumikizira chodziwika bwino cha ma solar panels ndi mtundu womwe nthawi zambiri umatchedwa "MC4." M'machitidwe, mawu akuti MC4 amagwiritsidwa ntchito kutanthauza cholumikizira cha PV cha awiriawiri (chachimuna ndi chachikazi) chokhala ndi makina otsekera, kukana kwa UV, komanso chitetezo chamadzi/fumbi chambiri. Komabe, ndikofunikira kudziwa: "MC4" ndi mtundu/mtundu winawake; zinthu zina zambiri "zimagwirizana ndi MC4," koma khalidwe lawo ndi ziphaso sizimafanana nthawi zonse.
Ubwino wa cholumikizira chamtunduwu:
- Zosavuta kuyika ndi kuchotsa ndi zida zapadera.
- Yopangidwira malo akunja (UV, kutentha, mvula).
- Kulumikizana kwamagetsi kokhazikika komanso kolimba pang'ono ikayikidwa bwino.
b) Cholumikizira cha nthambi (nthambi ya Y / nthambi ya T)
Imagwiritsidwa ntchito popanga makonzedwe ofanana pakati pa zingwe kapena pakati pa ma module opanda bokosi lophatikiza (m'makina ang'onoang'ono). Ndi yothandiza, koma ma rating okwanira amagetsi ayenera kutsimikizika, ndipo kufanana kumafunikirabe chitetezo choyenera.
c) Chotchingira ndi zolumikizira mu chophatikiza/chosinthira
Mkati mwa bokosi lophatikiza kapena inverter, ma screw terminals, ma cable lugs, kapena ma DC connectors apadera nthawi zambiri amagwiritsidwa ntchito. Zinthu zazikulu ndi kulimba kwa torque, kugwirizanitsa kukula kwa chingwe, ndi kutsimikiza kwa insulation.
3. Magawo ofunikira posankha cholumikizira
Kusankha cholumikizira sikutanthauza "kungogwirizana." Taganizirani izi:
a) Kuchuluka kwa magetsi ndi mphamvu zamagetsi
Onetsetsani kuti mphamvu ya magetsi ya cholumikizira ndi yayikulu kuposa kapena yofanana ndi mphamvu yayikulu ya magetsi ya system. Pa zingwe za PV, mphamvu yayikulu imawerengedwa kuchokera ku mphamvu ya open-circuit (Voc) pa kutentha kotsika kwambiri (popeza Voc imawonjezeka pamene kutentha kumachepa). Ngati makinawo adapangidwira 1000 VDC, cholumikiziracho chiyenera kukhala ndi chitsimikizo cha 1000 VDC (kapena kupitirira apo, monga 1500 VDC m'malo ena).
Mphamvu yamagetsi ndi yofunikanso: yang'anani Isc (yofupikitsa magetsi) ndi mphamvu yamagetsi yamagetsi yamagetsi/yofanana. Ngati mugwiritsa ntchito zingwe zingapo, mphamvu yamagetsi yophatikizana imatha kuwonjezeka kwambiri. Cholumikizira cha nthambi chiyenera kukhala ndi mphamvu yamagetsi yokwanira.
b) Kugwirizana kwa chingwe ndi gawo (mm² / AWG)
Zolumikizira za PV nthawi zambiri zimathandizira zingwe za 4 mm² kapena 6 mm², ndipo zina zimathandiziranso 10 mm². Kukakamiza chingwe chachikulu kulowa mu cholumikizira chosayenerera kumatha kuwononga crimp, kumasula cholumikizira, ndikuwonjezera kukana (zomwe zimapangitsa kutentha). Mosiyana ndi zimenezi, kugwiritsa ntchito chingwe chomwe chili chochepa kwambiri mu cholumikizira chopangidwira zingwe zazikulu kungayambitse kukhudzana kosamasuka.
c) Zinthu ndi mtundu wa kukhudzana
Zolumikizira zolumikizira nthawi zambiri zimapangidwa ndi mkuwa wopakidwa ndi chitsulo kapena siliva kuti zichepetse dzimbiri ndi kukana. Zipinda zolumikizira ziyenera kukhala zolimbana ndi UV komanso kutentha kwambiri. M'malo otentha, chinyezi ndi kutentha zimathandizira kuwonongeka kwa mapulasitiki otsika mtengo.
d) Mulingo woteteza IP ndi kukana kwa nyengo
Pogwiritsa ntchito panja, gwiritsani ntchito cholumikizira chomwe chili ndi IP yocheperako (monga IP67) mukayika. Komanso, ganizirani kukana kwa UV ndi kuzungulira kwa kutentha. Zolumikizira zomwe sizimalimbana ndi UV zimatha kusweka patatha zaka zingapo, zomwe zimapangitsa kuti madzi alowe ndikuyambitsa dzimbiri kapena kutuluka kwa magetsi.
e) Satifiketi yokhazikika
Sankhani zolumikizira zomwe zili ndi satifiketi yogwirizana ndi miyezo yapadziko lonse lapansi (monga IEC ya zigawo za PV). Satifiketi imasonyeza kuti cholumikiziracho chayesedwa kuti chione ngati chili ndi mphamvu, kutentha, mphamvu ya chingwe, ukalamba, ndi zina zokhudzana ndi chitetezo. Izi ndizofunikira makamaka pamakina omwe ali ndi inshuwaransi kapena omwe amayikidwa m'malo mwa projekiti.
4. Pewani kusakaniza zolumikizira za mitundu/mndandanda wosiyana.
Chimodzi mwa zolakwika zomwe zimachitika kawirikawiri ndi kusakaniza zolumikizira "zogwirizana ndi MC4" kuchokera ku mitundu yosiyanasiyana. Ngakhale zingawoneke ngati zikugwirizana, kulekerera kwa makina ndi mapangidwe a ma pin kumatha kusiyana pang'ono. Kusiyana pang'ono kumeneku kungayambitse:
– Kukhudzana kolakwika → kukana kumawonjezeka → kutentha.
– Loko si yolimba → cholumikizira chimamasuka mosavuta chifukwa cha kugwedezeka/kugwedezeka kwa chingwe.
- Nkhani za chitsimikizo ndi kutsata miyezo.
Njira yabwino kwambiri: gwiritsani ntchito ma connector pairs ochokera ku mtundu womwewo ndi mndandanda womwewo, makamaka pazifukwa zofunika kwambiri mu DC string. Ngati kusintha kuli kofunikira, gwiritsani ntchito ma adapter ovomerezeka mwalamulo ndipo nthawi zonse muzisamala ndi ma voltage/current ratings.
5. Njira yokhazikitsira: crimping yolondola imatsimikiza chilichonse
Zolumikizira za PV nthawi zambiri zimagwiritsa ntchito njira yokhoma kuti zigwirizane ndi ma contact pins. Ubwino wa crimp ndiye chinthu chofunikira kwambiri chomwe chimatsimikizira ubwino wa cholumikiziracho. Kukhoma kosayenera kungapangitse malo otentha, zomwe zingayambitse kusungunuka kapena kutentha kwa cholumikiziracho.
Zinthu zina zofunika kuchita:
- Gwiritsani ntchito zotchingira zapadera zomwe zimagwirizana ndi mtundu wa pini ndi kukula kwa chingwe.
- Onetsetsani kuti kuchotsa chingwe sikuwononga ulusi wa kondakitala.
- Chitani mayeso okoka pang'ono mutatha kukwinya kuti muwonetsetse kuti ndi olimba.
- Onetsetsani kuti chingwe/cholumikizira cha chingwe chayikidwa bwino kuti madzi asalowe ndipo chingwecho sichikokedwe mwachindunji pa pini.
Pakukhazikitsa akatswiri, kutsatira mphamvu yomangitsira gland yomwe wopanga amalangiza ndikofunikiranso. Kuthina kwambiri kungawononge chitseko, pomwe kutayirira kwambiri kungayambitse kutuluka kwa madzi.
6. Ganizirani zinthu zotetezera za DC: vuto la arc ndi kutentha kwambiri.
Mphamvu ya DC mu PV ikhoza kuyambitsa arc ngati pali kulumikizana kosasunthika kapena kusagwirizana kwachitika pamene katunduyo akutsitsidwa. Chifukwa chake:
– Musachotse cholumikizira cha DC pamene makina akadali ndi mphamvu/kuyikidwa, pokhapokha mutagwiritsa ntchito njira zoyenera zodzipatula.
- Gwiritsani ntchito cholumikizira chokhala ndi loko yabwino ndipo onetsetsani kuti chagwira bwino ntchito.
- Yang'anani nthawi zonse ngati pali zizindikiro za kutentha kwambiri: kusintha kwa mtundu, fungo la pulasitiki, zolumikizira zosweka, kapena zizindikiro za kutentha.
Mu makina akuluakulu, zipangizo zoteteza monga zolekanitsa bwino za DC, zingwe za fuse, ndi kuzindikira zolakwika za arc pa ma inverter zimatha kupititsa patsogolo chitetezo. Komabe, zipangizozi sizilowa m'malo mwa kufunikira kwa zolumikizira zoyenera ndi kukhazikitsa bwino.
7. Zolumikizira zokulitsa ndi kukonza
Ngati mukufuna kuwonjezera mapanelo mtsogolo, sankhani zolumikizira zomwe zilipo mosavuta komanso zogwirizana ndi mtundu wake. Izi zithandiza kusintha ngati pachitika kuwonongeka kulikonse. Komanso, sungani mawiri angapo olumikizira ndi mapini awo, chifukwa kuwonongeka pang'ono nthawi zambiri kumathetsedwa mwachangu posintha kuposa kukonza.
Kuphatikiza apo, kapangidwe ka njira yolumikizira mawaya kuyenera kuganizira zochepetsa kupsinjika kuti zolumikizira zisakumane ndi kupsinjika kwa makina. Kupsinjika kwa waya kosalekeza kungayambitse kumasuka kwa mawaya pakapita nthawi.
8. Malangizo othandiza posankha zolumikizira
Nayi malangizo achidule omwe mungatsatire:
1. Gwirizanitsani mndandanda ndi mtundu wa zolumikizira pa dongosolo/chingwe chimodzi.
2. Onetsetsani kuti mphamvu ya chingwe ikugwirizana ndi mphamvu ya chingwe pa kutentha kochepa kwambiri.
3. Onetsetsani kuti mulingo wamakono ndi wokwanira pakusintha kwa string current ndi parallel.
4. Yerekezerani kukula kwa chingwe (monga 4/6/10 mm²) ndi zofunikira za cholumikizira.
5. Sankhani zolumikizira zovomerezeka, zosagwira UV, komanso za IP yokwera.
6. Gwiritsani ntchito chida choyenera cha crimp ndipo yesani kuwona ngati crimp ili bwino.
7. Pewani ma adapter osankhidwa mwachisawawa pokhapokha ngati ndi ovomerezeka komanso ovomerezeka.
8. Chitani kafukufuku nthawi zonse makamaka mvula ikatha kapena kutentha kwambiri.
Mapeto
Kusankha cholumikizira choyenera cha makina amagetsi a dzuwa sikuti kungosankha "choyenera," komanso kuonetsetsa kuti magetsi akuyendera bwino, kulimba kwa chilengedwe, satifiketi, ndi mtundu wa kukhazikitsa. Cholumikizira chabwino, choyikidwa bwino chidzawonjezera magwiridwe antchito, kuchepetsa chiopsezo cha kuwonongeka, ndikuwonjezera moyo wa makinawo. Kuyika ndalama mu cholumikizira chabwino nthawi zambiri kumakhala kotsika mtengo kwambiri kuposa kukonza komwe kumachitika chifukwa cha malo otentha, kugwedezeka, kapena kuwonongeka kwa zigawo zina chifukwa cha kulumikizana koyipa.
Ngati mukufuna, ndingakuthandizeni kupanga mndandanda wa zofunikira zoyenera zolumikizira kutengera deta yanu yamakina (chiwerengero cha mapanelo, Voc/Isc, kasinthidwe ka zingwe, kukula kwa chingwe, ndi voltage ya inverter).
