Mu photovoltaic grid yakabatana inverters, kune akawanda voltage technical parameters: yakanyanya DC inopinza voltage, MPPT inoshanda voltage range, full load voltage range, kutanga voltage, rated input voltage, output voltage, etc. Aya ma parameter ane zvaanotarisa uye zvose zvinobatsira .Ichi chinyorwa chinopfupikisa dzimwe nyaya dzemagetsi e photovoltaic inverters yekutarisa uye kuchinjana.
Q:Maximum DC yekupinza voltage
A: Kudzikamisa iyo yakanyanya kuvhurika yedunhu voltage yetambo, inodiwa kuti iyo yakanyanya kuvhurika yedunhu voltage yetambo haigone kudarika iyo yakanyanya DC yekupinza voltage pane yakanyanya kuderera tembiricha.Semuenzaniso, kana iyo yakavhurika yedunhu voltage yechikamu iri 38V, iyo tembiricha coefficient -0.3%/℃, uye yakavhurika yedunhu voltage iri 43.7V paminus 25 ℃, ipapo yakakura ye25 tambo inogona kuumbwa.25 * 43.7=1092.5V.
Q:MPPT inoshanda voltage renji
A: Iyo inverter yakagadzirirwa kuchinjika kune inogara ichichinja voltage yezvikamu.Iyo voltage yezvikamu inosiyana zvichienderana nekuchinja kwechiedza uye tembiricha, uye huwandu hwezvikamu zvakabatana munhevedzano inodawo kugadzirwa zvinoenderana nemamiriro chaiwo eprojekiti.Naizvozvo, iyo inverter yakaisa huwandu hwekushanda mukati mayo inogona kushanda zvakajairika.Iyo yakakura iyo voltage renji, iyo yakawedzera kushanda kweiyo inverter.
Q: Yakazara mutoro voltage renji
A: Mukati meiyo voltage renji ye inverter, inogona kubuda yakayerwa simba.Pamusoro pekubatanidza photovoltaic modules, kunewo mamwe maapplication eiyo inverter.Iyo inverter ine yakanyanya kupinza ikozvino, yakadai se40kW, inova 76A.Chete kana magetsi ekuisa achipfuura 550V anogona kubuda kusvika 40kW.Kana iyo yekupinza voltage ichipfuura 800V, kupisa kunogadzirwa nekurasikirwa kunowedzera zvakanyanya, zvichitungamira kune inverter inoda kudzikisa kuburitsa kwayo.Saka iyo tambo voltage inofanirwa kugadzirwa zvakanyanya sezvinobvira pakati peiyo yakazara mutoro voltage renji.
Mubvunzo: Kutanga voltage
A: Usati watanga inverter, kana zvikamu zvisiri kushanda uye zviri munzvimbo yakashama yedunhu, iyo voltage ichave yakakwira.Mushure mekutanga inverter, zvikamu zvichange zviri kushanda, uye voltage ichaderera.Kuti udzivise inverter kubva pakutanga kakawanda, iyo yekutanga voltage ye inverter inofanira kuva yakakwirira kudarika shoma shoma yekushanda.Mushure mekunge inverter yatangwa, hazvireve kuti iyo inverter ichabva yave nekubuda kwemagetsi.Iyo inodzora chikamu cheiyo inverter, CPU, skrini uye zvimwe zvikamu zvinoshanda kutanga.Kutanga, iyo inverter inoongorora, uyezve inotarisa zvikamu uye gidhi remagetsi.Mushure mokunge pasina matambudziko, inverter ichava nekubuda chete apo simba re photovoltaic rinopfuura simba rekumira re inverter.
Iyo yakanyanya DC yekupinza voltage yakakwira kupfuura yakanyanya kushanda voltage yeMPPT, uye yekutanga voltage yakakwira kupfuura mashoma ekushanda voltage eMPPT.Izvi zvinodaro nekuti iwo maviri ma paramita eiyo yakanyanya DC yekupinza voltage uye yekutanga voltage inoenderana neyakavhurika yedunhu mamiriro echikamu, uye yakavhurika yedunhu voltage yechikamu ichi kazhinji inenge 20% yakakwirira kupfuura yekushanda voltage.
Q: Nzira yekuziva sei yakabuda voltage uye grid yekubatanidza voltage?
A: Iyo DC voltage haina hukama neiyo AC side voltage, uye yakajairwa photovoltaic inverter ine AC inobuda ye400VN/PE.Kuvapo kana kusavapo kweiyo yega transformer haina hukama neinobuda voltage.Iyo grid yakabatana inverter inogadzirisa ikozvino, uye grid yakabatana voltage inotsamira pane grid voltage.Pamberi pegidhi yekubatanidza, iyo inverter inoona iyo grid voltage uye inongobatanidza kune grid kana ikasangana nemamiriro.
Q: Ndeupi hukama pakati pekuisa uye kubuda voltage?
A: Ko voltage yakabuda yegridi yakabatana photovoltaic inverter yakawanikwa sei se270V?
Iyo yakanyanya simba yekutevera yemhando yepamusoro-simba inverter MPPT ndeye 420-850V, zvinoreva kuti simba rinobuda rinosvika 100% kana DC voltage iri 420V.
Iyo peak voltage (DC420V) inoshandurwa kuita voltage inoshanda yealternating ikozvino, yakapetwa neiyo conversion coefficient kuti iwane (AC270V), iyo ine hukama neiyo voltage regulation renji uye pulse wide kubuda duty cycle yedivi rekubuda.
Iyo voltage regulation range ye 270 (-10% kusvika 10%) ndeiyi: yakanyanya kubuda voltage paDC side DC420V ndeye AC297V;Kuti uwane kukosha kunoshanda kwe AC297V AC simba uye DC voltage (peak AC voltage) ye297 * 1.414=420V, iyo reverse calculation inogona kuwana AC270V.Maitiro acho ndeekuti: DC420V DC simba rinodzorwa nePWM (pulse wide modulation) mushure mekubatidzwa nekudzimwa (IGBT, IPM, nezvimwewo), uye yobva yasefa kuti iwane simba reAC.
Mubvunzo: Ko photovoltaic inverters inoda yakaderera voltage kukwira kuburikidza?
A: General power station type photovoltaic inverters inoda yakaderera voltage kukwira kuburikidza nebasa.
Kana giredhi remagetsi kukanganisa kana kukanganisa kunokonzera kudonha kwemagetsi pamagetsi ekubatanidza mapurazi emhepo, ma turbines emhepo anogona kushanda achienderera mukati mehuwandu hwekudonha kwemagetsi.Kune photovoltaic magetsi emagetsi, apo magetsi emagetsi emagetsi kana kukanganisa kunokonzera madonhwe emagetsi emagetsi, mukati meimwe nzvimbo uye nguva yekudonha kwemagetsi, photovoltaic magetsi emagetsi anogona kuvimbisa kuenderera mberi kwekushanda pasina kubviswa kubva gridhi.
Mubvunzo: Chii chinonzi voltage yekupinda padivi reDC regridhi yakabatana inverter?
A: Iyo yekuisa voltage padivi reDC ye photovoltaic inverter inosiyana nemutoro.Iyo chaiyo yekupinza voltage ine hukama nesilicon wafer.Nekuda kwekupikiswa kwakanyanya kwemukati kwesilicon mapaneru, kana mutoro wezvino ukawedzera, voltage yesilicon panels inoderera nekukurumidza.Naizvozvo, zvinodikanwa kuve nehunyanzvi hwekuita iyo inova yakanyanya simba point control.Chengetedza iyo inobuda voltage uye yazvino yesilicon pani padanho rinonzwisisika kuti uve nechokwadi chekubuda kwesimba.
Kazhinji, kune simba rekubatsira mukati me photovoltaic inverter.Iri rebetsero magetsi rinowanzotangwa kana magetsi ekuisa DC asvika panosvika 200V.Mushure mekutanga, simba rinogona kupihwa kune yemukati control circuit ye inverter, uye muchina unopinda mumodhi yekumira.
Kazhinji, kana magetsi ekuisa asvika 200V kana pamusoro, inverter inogona kutanga kushanda.Kutanga, wedzera iyo yekuisa DC kune imwe voltage, wozoishandura kune iyo grid voltage uye ona kuti chikamu chinoramba chiripo, uye wochibatanidza mugedhi.Inverters dzinowanzoda kuti grid voltage ive pazasi 270Vac, zvikasadaro haigone kushanda nemazvo.Iyo inverter grid yekubatanidza inoda kuti inobuda hunhu hweiyo inverter ndiyo yazvino sosi hunhu, uye inofanirwa kuve nechokwadi chekuti chikamu chekubuda chinoenderana neAC chikamu chegidhi remagetsi.
Nguva yekutumira: May-15-2024