Kuhlelo lwe-photovoltaic, ugesi okhiqizwayo ugeleza kusuka kumamojula we-photovoltaic kuya ku-inverter, okuguqula okwamanje okuqondile kuya kokushintshana kwamanje.La mandla e-AC abe esesetshenziselwa ukunika amandla imithwalo efana nezinto zikagesi noma izibani noma abuyiselwe kugridi.Kodwa-ke, kwezinye izimo, ukugeleza kukagesi kungashintshwa, ikakhulukazi lapho uhlelo lwe-photovoltaic lukhiqiza ugesi omningi kunalokho okudingayo umthwalo.Kulokhu, uma imojula ye-PV isakhiqiza amandla futhi umthwalo udla amandla amancane noma awekho nhlobo, kungase kube khona ukugeleza kwamanje okuhlanekezela kusuka emthwalweni obuyela kugridi, okubangela izingozi zokuphepha nokulimala kwemishini.
Ukuze uvimbele lokhu kugeleza kwamanje okuhlehlayo, amasistimu e-photovoltaic afakwe amadivayisi amanje aphikisana nokuhlehla noma izici.Lawa madivayisi aqinisekisa ukuthi ukugeleza kwamanje kuphela ngendlela oyifunayo, kusukela kumojula ye-photovoltaic kuya kumthwalo noma igridi.Zivimbela noma yikuphi ukubuyela emuva kwamanje futhi zivikela amasistimu nemishini ekulimaleni okungaba khona.Ngokuhlanganisa ukusebenza kwamanje okuphambene nokuhlehla, abaqhubi besistimu ye-PV bangaqinisekisa ukusebenza okuphephile nokusebenza kahle, basuse izingozi zamanje ezihlehliswayo, futhi bathobele izindinganiso nemithetho zokuphepha.
Umgomo oyinhloko wokuvimbela i-inverter backflow ukuthola i-voltage kanye nemvamisa yegridi yamandla ngesikhathi sangempela ukuze uqaphele ukulawula nokulawulwa kwe-inverter.Nazi izindlela ezimbalwa zokubona i-inverter anti-backflow:
Ukutholwa kwe-DC: I-inverter ithola ngokuqondile isiqondiso nosayizi wamanje ngokusebenzisa inzwa yamanje noma umtshina wamanje, futhi ilungisa ngamandla amandla okukhiphayo we-inverter ngokusho kolwazi olutholiwe.Uma kutholwa isimo samanje esihlehlayo, i-inverter izonciphisa ngokushesha noma iyeke ukunikeza amandla kugridi.
Idivaysi yamanje ephikisana nokuhlehla: Idivaysi yamanje ephikisana nokuhlehla ngokuvamile iyisisetshenziswa se-elekthronikhi esithola isimo samanje esihlehla futhi sithathe izinyathelo zokulawula ezifanele.Ngokuvamile, idivayisi yokuvimbela ukugeleza kwe-backflow iqapha i-voltage kanye nemvamisa yegridi futhi, lapho ithola ukugeleza emuva, ilungisa ngokushesha amandla okukhipha we-inverter noma imise ukulethwa kwamandla.Idivayisi yokuvimbela ukubuyela emuva ingasetshenziswa njengemodyuli eyengeziwe noma ingxenye ye-inverter, engakhethwa futhi ifakwe ngokuvumelana nezidingo ze-inverter.
Amadivayisi okugcina amandla: Amadivayisi okugcina amandla angasiza ukuxazulula inkinga ye-inverter's backflow.Uma amandla akhiqizwa i-inverter edlula isidingo somthwalo wegridi, amandla engeziwe angagcinwa kudivayisi yokugcina amandla.Amadivayisi okugcina amandla angaba amaphakethe ebhethri, ama-supercapacitor, amadivaysi okugcina i-hydrogen, njll. Uma igridi idinga amandla engeziwe, idivayisi yokugcina amandla ingakhulula amandla agciniwe futhi inciphise ukuncika kugridi, ngaleyo ndlela ivimbele ukubuyela emuva.
Ukuthola I-Voltage kanye Nemvamisa: I-inverter ayitholi kuphela okwamanje ukuze inqume ukuthi i-reverse current iyenzeka yini kodwa futhi iqapha i-voltage yegridi kanye nemvamisa ukuze ibone i-anti-reverse current.Lapho i-inverter iqapha ukuthi i-voltage yegridi noma i-frequency iphumile ebangeni elimisiwe, izonciphisa noma imise ukuletha amandla kugridi ukuze ivimbele ukuhlehla kwamandla.
Kumele kuqashelwe ukuthi indlela eqondile yokuqaphela ukuvimbela ukubuyela emuva kwe-inverter izohluka kuye ngokuthi umkhiqizo kanye nemodeli ye-inverter.Ngakho-ke, kunconywa ukuthi uma usebenzisa i-inverter, funda imanuwali yomkhiqizo kanye nebhukwana lokusebenza ngokucophelela ukuze uqonde ukugcwaliseka okuqondile kanye nendlela yokusebenza yomsebenzi wawo wamanje wokuphikisa.
Isikhathi sokuthumela: Jul-21-2023