Ngokuthuthuka okusheshayo kwemboni ye-photovoltaic, umthamo ofakiwe uyanda.Kwezinye izindawo, umthamo ofakiwe ugcwele, futhi amasistimu elanga asanda kufakwa awakwazi ukuthengisa ugesi ku-inthanethi.Izinkampani zegridi zidinga leyo grid-ixhunyweAmasistimu e-PVezakhiwe esikhathini esizayo zibe amasistimu okukhiqiza amandla angena emuva.
Iyini i-Counterflow?
Yini i-reverse current?Kuhlelo lwe-PV, amandla kagesi ngokuvamile ahanjiswa kusuka kugridi kuya emthwalweni, okubizwa ngokuthi i-forward current.Uma isistimu ye-PV ifakiwe, uma amandla esistimu ye-PV makhulu kunamandla omthwalo wendawo, amandla angasetshenzisiwe athunyelwa kugridi.Njengoba isiqondiso samanje siphambene naso samanje esivamile, lokhu kubizwa ngokuthi 'i-reverse current'.Kumitha yezindlela ezimbili exhunywe kugridi, amandla aya phambili amandla alethwa ukusuka kugridi ukuya emthwalweni, futhi amandla ahlehlayo amandla alethwa kusistimu ye-PV ukuya kugridi.Uhlelo lwe-backfeed PV lusho ukuthi amandla akhiqizwa yi-PV angasetshenziswa kuphela imithwalo yasendaweni futhi awakwazi ukuthunyelwa kugridi.
Lapho isiguquli se-PV siguqula amaphuzu e-DC akhiqizwe amamojula e-PV abe amandla e-AC, kunezingxenye ze-DC nama-harmonics, ukungalingani kwamanje kwezigaba ezintathu kanye nokungaqiniseki emandleni okukhiphayo.Uma amandla akhiqiziwe efakwa kugridi yomphakathi, azodala ukungcoliswa kwe-harmonic kugridi, okungabangela kalula i-voltage yegridi ukuthi iguquguquke futhi ilokoze.Uma kunemithombo eminingi enjalo yokuphehla amandla efaka amandla kugridi, ikhwalithi yamandla wegridi izokwehliswa kakhulu.Ngakho-ke, lolu hlobo lwesistimu yokuphehla amandla e-photovoltaic kufanele lufakwe amadivayisi okuvikela amanje ahlehlayo ukuze kuvinjelwe ukwenzeka kwamandla abuyela emuva.
Kungavinjelwa kanjani ukuhlehla kwamandla?
I-anti-reverseumgomo wamanje wokusebenza: Faka ianti-reverseimitha yamanje noma inzwa yamanje endaweni yokuxhuma kugridi.Uma ithola ukugeleza kwamanje kugridi, ithumela isignali ku-inverter ngokuxhumana kwe-485, futhi i-inverter inciphisa amandla okukhipha kuze kube yilapho okukhiphayo okubuyela emuva kunguziro.Lokhu kuqondaanti-reverseumsebenzi wamanje.Ngokusho kwamazinga kagesi ahlukene wohlelo, uhlelo lwe-PV lungahlukaniswa lube yisigaba esisodwaanti-reverseuhlelo lwamanje kanye nesigaba sesithathuanti-reverseuhlelo lwamanje.
Indlela yokukhetha i-anti-reverseimitha ehlakaniphile yamanje?
Uma ukukhiqizwa kwamandla e-PV kukhulu kunesidingo somthwalo, amandla ahlehlayo ayakhiqizwa.Sidinga imitha ukuze sithole futhi sinqume ukukhishwa kwamandla asebenzayo we-inverter, bese imitha ithumela isignali ngokuxhumana kwe-RS485 ukuze ihlanganyele nedatha ye-inverter ukuze silawule amandla okukhipha isiguquli ukuze silinganise amandla okukhiphayo namandla kagesi.
Ukunemba: Khetha imitha ehlakaniphile ekala ngokunembile ukusetshenziswa kukagesi okuhle nokubi.Kufanele inembe kakhulu ukuze kuqinisekiswe ukukhokhiswa nokuqapha okunembile.
Ukuhambisana: Hlola ukuthi imitha ehlakaniphile iyahambisana yini nesistimu yakho kagesi kanye nezidingo zokusetshenziswa.Kufanele isebenze ngaphandle komthungo nengqalasizinda yakho ekhona futhi ikwazi ukuxhuma kusistimu yokulinganisa yensiza.
Izimiso zokuxhumana: Qiniseka ukuthi imitha ehlakaniphile isekela izimiso zokuxhumana ezihambisana nenethiwekhi yohlelo.Izivumelwano ezijwayelekile yiModbus, DLMS/COSEM kanye neZigbee.
Ukuphathwa kwedatha: Cabangela amandla okuphatha idatha wemitha ehlakaniphile.Kufanele ibe nesikhala esanele sokulondoloza kanye nekhono lokudlulisa idatha kusistimu ephakathi nendawo ukuze kukhokhelwe futhi kuhlaziywe.Bheka amamitha anikeza ukubethela kwedatha kanye nokudluliswa okuvikelekile.
Isikhathi sokuthumela: Sep-08-2023