Lub tshuab twg txawv txav ntawm photovoltaic?

1, cov txuj ci ua thiab lub cev mechanisms ntawm Diode Aging
Kev laus ntawm diodes yog qhov tshwm sim ntawm kev sib xyaw ua ke ntawm cov khoom siv hluav taws xob ua haujlwm thiab cov khoom ua rau hluav taws xob, thiab nws cov laj thawj hluav taws xob nrog:

Thermal Kev Nyuaj Siab tsub zuj zuj: Qhov kev ua haujlwm kub ntawm photovoltaic feem ntau yog -40 degree+85}} Thaum lawv muaj lub xeev ua haujlwm (xws li thaum lawv pom thaum ntxoov). Ntev lub sij hawm kub ib puag ncig yuav nrawm ntawm kev sib txawv ntawm silicon lattice qhov tsis xws luag, uas ua rau nce nce mus rau pem hauv ntej hluav taws xob poob (vf) xyoo los ntawm ib xyoos. Kev sim cov ntaub ntawv qhia tau tias VF ntawm Schottky diodes khiav rau 5 xyoo tuaj yeem nce ntxiv ntawm thawj zaug 0.3V rau 0.5v, nrog rau 67% nce hauv kev kho kom haum.
Kev ntxhov siab hluav taws xob: kev hloov pauv hluav taws xob tsim los ntawm xob laim thiab hloov chaw (xws li tawg ntawm pn trerminal ntawm diode, ua rau zais kev puas tsuaj. Nyob rau hauv qee yam photovoltaic lub hwj chim nroj tsuag nroj tsuag, 30% ntawm bypass aides kev sib tw tam sim no (thiab ua rau muaj kev pheej hmoo ntawm kev tiv thaiv kev tiv thaiv thermal khiav tawm thermal.
Cov khoom siv oxidation thiab cov pa phem: thaum lub thawv hlws thaiv tsis zoo, ua rau muaj kev tiv thaiv dej tsis zoo (RC) kom sawv ntawm Milliohms rau Ohms. Kev kuaj sim ua kom pom tias kev sib chwv tsis taus ntawm oxidized diidized despes (Rs) ntawm cov khoom siv (FF) los ntawm 8%.
2, Cheebtsam Cheebtsam Cheebtsam Ib Feem ntau: Los ntawm kev ua kom muaj zog rau thermal khiav khiav
Qhov cuam tshuam ntawm Diody Laus ntawm photovoltaic yog ncaj qha rau hauv cov hluav taws xob tsis muaj hluav taws xob thiab cov ntsuas hluav taws xob tsis ua hauj lwm:

Txo cov zog hluav taws xob ua tau zoo: qhov nce rau pem hauv ntej voltage poob yuav ncaj qha rau kev ua kom tiav ntau dua. Siv ib qho tam sim no ntawm 20A ua piv txwv, thaum VF nce los ntawm 0.5v, lub raj siv hluav taws xob ntawm ib lub raj muaj ntau ntxiv los ntawm 10W txog rau hauv 4% poob rau hauv cov zis siv zog ntawm cov khoom siv. Yog tias muaj ntau yam diodes hauv txoj hlua lub hnub nyoog, qhov kev poob qis dua 10%%.
The hot spot effect intensifies: an increase in reverse leakage current (Ir>10 μ a) yuav ua rau lub cev thaiv hluav taws xob ua rau muaj lub zog hluav taws xob ntxiv, ua rau muaj qhov kub nyob hauv qhov cub hluav taws xob hauv ib cheeb tsam. Daim teb ntsuas pom tias ib daim diode nrog i ... 2}}}}} Qhov ntsuas kub ntawm lub teeb tawg thiab kev laus ntawm cov khoom ntim ntim.
Kev pheej hmoo ntawm lub thawv hlws ris ntoo: Qhov nce ntxiv hauv kev sib chwv dej kub → Nyob rau hauv lub chaw nres tsheb fais fab, ib tug diode nrog rc {{1} ω ω thiab thaum kawg poob cov khoom rwb thaiv tsev ntawm lub thawv hlws ris.
3, Txheej Txheem Qib Anomy: Los ntawm txoj hlua tsis sib haum rau cov neeg muaj zog poob
Qhov cuam tshuam ntawm Diody Laus ntawm photovoltaic yuav muaj txiaj ntsig los ntawm cascading teebmeem:

Txoj hlua kev tsis sib haum xeeb: Kev laus diodes tshwm sim nyob rau hauv ploj lawm qhib Circuit Court, ua rau "distortion nyob rau hauv kuv {} v nkhaus ntawm txoj hlua. Kev simulation ntawm 1MW photoovoltaic lub chaw nres tsheb fais qhia pom tias thaum muaj txoj hlua loj tshaj plaws (MPP) lub zog ua haujlwm tsawg dua li 28000 xyoo.
Kev ua haujlwm qis dua: kev hloov pauv hauv cov zis hluav taws xob ntawm cov kab ntawv yuav yuam cov inverter kom nquag hloov nws cov haujlwm ua haujlwm, txo qis hloov zuj zus. Kev sim cov ntaub ntawv qhia tau tias thaum lub voltage rupland ntau nthuav dav los ntawm ± 5%, qhov kev ua tau zoo ntawm 98.5% rau 97.2%.
DC sab kev nyab xeeb kev nyab xeeb: Kev laus dodes yuav ua rau muaj kev pheej hmoo ntawm DC arcing. Thaum lub diode yog qhib cov kev ncig, tam sim no yog yuam kom hla dhau lwm txoj kev (xws li hlau nkhaus hlau), sib sau ua arc paug. Kev tshawb nrhiav kom pom kev tua hluav taws pom tias qhov qhib Circuit Court ntawm Diode ntawm lub thawv hlws ris yog qhov ncaj qha ua rau DC sab arc.
4, Kev Tshawb Nrhiav thiab Kev Ntsuas: Los ntawm txhais tes tshuaj xyuas rau soj ntsuam ntse
Txhawm rau daws qhov teeb meem ntawm Diody Laus, ntau {{{}}}}}} level level Kev kuaj qib tau yuav tsum tau tsim:

Qhov ntsuas hluav taws xob infrared kuaj tau: los ntawm kev siv lub siab {{Precision thermal ntaus ntawv mounted ntawm ib lub drone (xws li zenith hecising ntaus ntawv mounted ntawm 1224), tsis zoo li ntawm lub thawv hlawb tawm tuaj yeem pom tau. Qhov ntsuas ntsuas ntsuas ntawm lub chaw nres tsheb fais fab hluav taws xob qhia tau tias qhov qub teev diode yog 10-15℃siab dua li ib puag ncig yuav siab dua los ntawm ntau tshaj 30 degree.
Kev tshuaj ntsuam hluav taws xob parameter kom sau cov tshuaj I I6 0}} v ntaub ntawv thiab nrhiav cov lus qhia "ruam". Piv txwv li, ib qho teeb meem luv luv circuit Court tuaj yeem ua rau poob ntawm txoj hlua sub voc, thaum kev laus dodees tuaj yeem ua rau muaj kev txawv txav.
Online monitoring system: Deploy intelligent junction boxes (such as integrated MSOP8 controller type ideal diodes) to monitor parameters such as Vf, Ir, Tc (junction temperature) in real-time. A demonstration project has reduced the detection time of diode faults from a monthly level to an hourly level by using threshold alarms (such as Vf>0.45V or Ir>5 μ A).
5, Teb Lub Tswv Yim: Los ntawm passive hloov mus rau kev tiv thaiv tawm
Cov khoom siv thiab cov txheej txheem kev ua kom zoo dua: cov ntaub ntawv dav dav (xws li SIC SCHOTTKY DICHES) tau raug xaiv, nrog qhov kub tsis kam txog 175 degree; Siv laser vuam technology los txo kev sib chwv tiv thaiv, cov kev sim tau qhia tias laser vuam tuaj yeem txo RC los ntawm 80%.
Kev tsim qauv zoo tshaj plaws: parallel backup diodes txuas nrog rau hauv lub thawv hlws ris, uas cia li hloov thaum lub ntsiab diode poob. Qee cov chaw tsim khoom lag luam txo qhov tsis ua haujlwm ntawm 0.5% / xyoo mus rau 0.1% / xyoo los ntawm tus qauv Diode dual diode.
Kev ua haujlwm ntse thiab kev txij nkawm: Tsim kom muaj Diode lub neej ua ntej ua qauv, thiab xam cov ntaub ntawv uas tseem tshuav raws li tam sim no txaus caij nyoog thiab muaj kev sib tua kub. Lub chaw nres tsheb fais fab tau txuas ntxiv rau cov ntaub ntawv hloov chaw ntxiv los ntawm 5 xyoos mus rau 7 xyoo los ntawm cov ntaub ntawv tshawb xyuas loj, txo cov nqi ua haujlwm los ntawm 30%.