Uhlu lwamaseli elanga: I-Anti-Reverse Diode ne-Bypass Diode

Kuhlelo lwesikwele samaseli elanga, i-diode iyithuluzi elivame kakhulu.Ama-diode asetshenziswa kakhulu ngokuyisisekelo ama-silicon rectifier diode.Lapho ukhetha, shiya imajini kuzicaciso ukuze uvimbele ukulimala kokuhlukana.Ngokuvamile, i-voltage ehlehliswayo ephezulu ehlehlayo kanye namandla aphezulu okusebenza kufanele kube ngaphezu kokuphindwe kabili kunomthamo omkhulu wevoltheji osebenzayo kanye nomthamo osebenzayo.Ama-Diode ahlukaniswe ngokuyinhloko abe yizigaba ezimbili ezinhlelweni zokukhiqiza amandla elanga photovoltaic.

1. I-Anti-Reverse (Anti-Backflow) I-Diode

Omunye wemisebenzi ye-I-anti-reverse diodeukuvimbela ukusebenza kwebhethri kusuka kumojula yeseli yelanga noma i-square array ukuthi iguqulwe ibe yimojula noma i-square array uma ingakhiqizi ugesi, okungagcini nje ngokudla amandla, kodwa futhi kubangela ukuthi imojula noma uhlu lwesikwele shisa noma ulimale;Umsebenzi wesibili ukuvimbela ukugeleza kwamanje phakathi kwamagatsha ochungechunge lwesikwele ohlwini lwebhethri.Lokhu kungenxa yokuthi i-voltage ephumayo yegatsha ngalinye ochungechungeni ayikwazi ukulingana ngokuphelele, kuhlale kunomehluko phakathi kwe-voltage ephezulu nephansi igatsha ngalinye, noma i-voltage ephumayo yegatsha iyancipha ngenxa yephutha noma i-shading shading, futhi i-current yegatsha le-voltage ephezulu izogeleza egatsheni lamandla aphansi, noma ngisho ne-voltage ephumayo yesamba sesikwele esiphelele izokwehliswa.Lesi simo singagwenywa ngokuxhuma ama-anti reverse ukushaja ama-diode ochungechungeni egatsheni ngalinye.
Kuhlelo oluzimele lokukhiqiza amandla e-photovoltaic, ezinye izifunda zesilawuli se-photovoltaic zixhunywe kuma-diode wokushaja aphikisayo, okungukuthi, lapho isilawuli sinomsebenzi wokushaja ophikisana nokuhlehla, ukuphuma kwengxenye akudingeki ukuthi kuxhunywe ku-diode.
I-anti-reverse diode inokwehla kwe-voltage eya phambili, futhi kuzoba nokusetshenziswa okuthile kwamandla lapho kuxhunywe ochungechungeni kusekethe.Ukwehla kwe-voltage ye-silicon rectifier diode ngokuvamile esetshenziswa cishe ku-0.7V, futhi ishubhu lamandla amakhulu lingafinyelela ku-1~20.3V, kodwa amandla ayo okumelana ne-voltage futhi Amandla mancane, afanele ukusetshenziswa kwamandla aphansi.

I-PV anti-reverse diode idinga ukuba nezici ezilandelayo:

1. I-voltage ephezulu: ngokuvamile idinga ukweqa i-1500V, ngoba ubuningi be-photovoltaic array izofinyelela noma idlule ku-1000V.

2. Ukusetshenziswa kwamandla okuphansi, okungukuthi, ukumelana (on-state impedance incane ngangokunokwenzeka, ngokuvamile ingaphansi kuka-0.8 ~ 0.9V): Njengoba uhlelo lwe-photovoltaic ludinga ukugcina ukusebenza kahle okuphezulu kwalo lonke uhlelo, amandla ukusetshenziswa kwe-anti-reverse diode ebhokisini lesihlanganisi kufanele kube kuncane ngangokunokwenzeka.

3. Umthamo omuhle wokukhipha ukushisa (ukumelana nokushisa okuphansi kanye nokukhishwa kahle kokushisa kuyadingeka): Ngenxa yokuthi indawo yokusebenza yebhokisi lesihlanganisi se-photovoltaic ngokuvamile impofu, i-anti-reverse diode idinga ukuba nomthamo omuhle wokulahla ukushisa, futhi ngokuvamile kudingeka futhi cabangela izimo zezulu njengeGobi nethafa.

2. I-Bypass Diode

Uma kunamamojula eseli elanga engeziwe axhunywe ochungechungeni ukuze akhe uchungechunge lwamaseli ayisikwele noma igatsha lohlu lwamaseli ayisikwele, ama-diode awodwa (noma 2~3) adinga ukuxhunywa ngokuphambana okuphambene kumatheminali okukhiphayo okuhle nokubi kwebhethri ngalinye. iphaneli.Ama-diode axhunywe ngokuhambisana kuzo zombili iziphetho zengxenye abizwa ngokuthi ama-bypass diode.
Umsebenzi we-bypass diode ukuvimbela ingxenye ethile kuhlelo oluyisikwele noma ingxenye ethile yengxenye ukuthi ibe nomthunzi noma ingasebenzi kahle ukuze kumiswe ukukhiqizwa kwamandla.Ukuchema okuya phambili kuzokwakhiwa kuzo zombili iziphetho zengxenye ye-bypass diode ukwenza ukuziphatha kwe-diode.Intambo esebenzayo yamanje idlula ingxenye engalungile futhi igeleza ku-diode, engathinti ukukhiqizwa kwamandla kwezinye izingxenye ezivamile.Ngesikhathi esifanayo, iphinde ivikele ingxenye edlulisiwe ukuthi ingalinyazwa ukuchema okuphezulu okuya phambili noma ukushisa ngenxa "yomphumela wendawo eshisayo".
Ama-bypass diode ngokuvamile afakwa ngqo ebhokisini lokuhlangana.Ngokusho kwamandla ezingxenye kanye nenani lezintambo zebhethri, ama-diode angu-1 kuya kwangu-3 afakiwe.
I-Bypass diode ayidingeki kunoma yisiphi isimo.Lapho izingxenye zisetshenziswa zodwa noma ngokufana, azidingi ukuxhunywa ku-diode.Ezikhathini lapho inani lezingxenye kuchungechunge lincane futhi indawo yokusebenza yinhle, kungenzeka futhi ukucabangela ukungasebenzisi i-bypass diode.

Umgomo Wesekethe Yokuvikela I-Diode

Umsebenzi ovame kakhulu we-diode ukuvumela kuphela i-current ukuthi idlule ohlangothini olulodwa (okuthiwa ukuchema phambili) futhi uvimbele ohlangothini oluhlehlayo (olubizwa ngokuthi i-reverse bias).

Lapho i-voltage bias eya phambili ikhiqizwa, ukucindezelwa okuhambisanayo kwenkambu kagesi yangaphandle kanye nenkambu kagesi eyakhiwe ngokwayo kwandisa amandla okusabalalisa abathwali futhi kubangele okwamanje (okungukuthi, imbangela yokuqhutshwa kukagesi).

Lapho kukhiqizwa ukuchema kwe-voltage ehlehlayo, inkambu kagesi yangaphandle kanye nenkundla kagesi ezakhelwe yona iyaqiniswa ngokwengeziwe, yenze i-reverse saturation current I0 engahlangene nakancane ne-reverse bias voltage ebangeni elithile lamandla kagesi ahlehlayo (lesi isizathu. kokungaqhubeki).

Uma kukhona ukuchema kwe-voltage ehlehlayo ngaphandle, inkambu kagesi yangaphandle kanye nenkambu kagesi ezakhelwe yona ziyaqiniswa ngokwengeziwe, zenze i-reverse saturation yamanje i-I0 engazimele enanini lamandla kagesi elihlehlayo phakathi kwebanga elithile le-voltage ehlehlayo.