Mu dongosolo la photovoltaic (PV), magetsi opangidwa amagwiritsidwa ntchito makamaka popereka mphamvu. Pamene kupanga mphamvu kupitirira kufunikira kwa mphamvu, magetsi ochulukirapo amabwerera mu gridi, zomwe zimapangitsa kuti "mphamvu yobwerera m'mbuyo igwire ntchito." Malamulo a gridi nthawi zambiri amaletsa kubwerera m'mbuyo kosaloledwa, ndipo kudyetsa mphamvu kosaloledwa kungayambitse zilango. Pa mapulojekiti a PV omwe amapangidwira kuti azidzigwiritsa ntchito okha popanda kudyetsa gridi, chitetezo choletsa kubwerera m'mbuyo ndikofunikira kwambiri kuti pakhale mphamvu yokhazikika.
Kodi Anti-Backflow ndi chiyani?
Mu dongosolo la PV, ma solar modules amapanga mphamvu yolunjika (DC), yomwe imasinthidwa kukhala mphamvu yosinthira (AC) ndi inverter kuti ipereke mphamvu zakomweko. Ngati kupanga kwapitirira kugwiritsidwa ntchito, magetsi ochulukirapo amabwerera mu gridi, ndikupanga kuyenda kwa magetsi. Machitidwe omwe ali ndi ntchito yotsutsana ndi kubwerera kwa magetsi amatha kusintha mphamvu ya inverter kuti atsimikizire kuti magetsi opangidwawo agwiritsidwa ntchito mokwanira ndi mphamvu zakomweko, kuletsa mphamvu yochulukirapo kulowa mu gridi.
N'chifukwa Chiyani Mukuyika Anti-Backflow?
Zifukwa zazikulu zokhazikitsira anti-backflow ndi izi:
1. Zoletsa za Ndondomeko ya Grid:M'madera ena, zoletsa kapena mfundo za gridi zimaletsa kuyika magetsi mu gridi. Kubwerera m'mbuyo kosaloledwa kungayambitse zilango.
2. Zoletsa Zolumikizira pa Gridi:Gridiyi imaika malire okhwima pa kuchuluka kwa mphamvu zomwe zingalowemo. Kupitirira malire awa popanda kulamulira kungasokoneze kukhazikika kwa gridiyiyi.
3. Mfundo Yodzigwiritsira Ntchito:Makina a PV opangidwira kuti azidzigwiritsa ntchito okha amaika patsogolo kugwiritsa ntchito katundu wamba. Mphamvu iliyonse yochulukirapo iyenera kutsekedwa kuti isalowe mu gridi pogwiritsa ntchito zida zotsutsana ndi kubwerera kwa magetsi.
Mfundo Yogwirira Ntchito Yotsutsana ndi Kubwerera M'mbuyo
Makina oletsa kuyenda kwa magetsi nthawi zambiri amakhala ndi choyezera kuyenda kwa magetsi chotsutsana ndi kuyenda kwa magetsi ndi chosinthira magetsi (CT) chomwe chimayikidwa pa mzere waukulu. Zigawozi zimayesa mphamvu yeniyeni ndi kuyenda kwa magetsi. Pamene magetsi obwerera m'mbuyo apezeka, choyezeracho chimatumiza deta ya kuyenda kwa magetsi ku choyezera magetsi kudzera mu kulumikizana kwa RS485. Choyezera magetsi chimayankha mkati mwa masekondi, kuchepetsa mphamvu yake yotulutsa kuti zitsimikizire kuti kuyenda kwa magetsi mu gridi kuli pafupifupi zero.
Mayankho Otsutsana ndi Kubwerera M'mbuyo
Makonzedwe osiyanasiyana amapezeka kuti akwaniritse zochitika zosiyanasiyana:
1. Njira Yothetsera Mavuto Osabwerera M'mbuyo ya Gawo Limodzi
· Zipangizo zofunika: inverter yolumikizidwa ndi gridi, choyezera madzi choletsa kuyenda kwa madzi, ndi chingwe cholumikizirana.
· Yoyenera makina ang'onoang'ono a PV okhala m'nyumba.
2. Yankho la Machitidwe Otsutsana ndi Kubwerera M'mbuyo a Magawo Atatu
· Pa makina okhala ndi mphamvu zochepa, ma DC anti-backflow mita amatha kulumikizidwa mwachindunji ku ma terminal a AC output a inverter.
· Pa makina amphamvu kwambiri, ma transformer a CT amazindikira mphamvu yamagetsi pamalo olumikizirana ndi gridi. Mphamvu ya CT imakwezedwa ndikuyikidwa mu choyezera mphamvu chotsutsana ndi kubwerera m'mbuyo kuti chiyesedwe bwino.
3. Yankho la Njira Yotsutsana ndi Kubwerera M'mbuyo kwa Ma Inverter Ambiri
· Ma inverter angapo amalumikizidwa kudzera mu ma interface olumikizirana ku deta logger.
· Yankho ili ndi labwino kwambiri pamakina akuluakulu, limapereka mphamvu zambiri komanso magwiridwe antchito olimba.
Chidule
Mayankho oletsa kubwerera m'mbuyo amakhudza zofunikira za mfundo za "zolumikizidwa ndi gridi koma zosalowa mkati" m'madera enaake. Amawonjezera kukhazikika kwa gridi, amawongolera chitetezo cha makina, amawongolera kugwiritsa ntchito mphamvu moyenera, komanso amasinthasintha malinga ndi ukadaulo ndi mfundo zomwe zikusintha. Pogwiritsa ntchito njira zotsutsana ndi kubwerera m'mbuyo, mapulojekiti a PV amatha kutsimikizira kuti zinthu zikutsatira malamulo, kudalirika, komanso kukhala ndi moyo wabwino pazachuma.
