Dab tsi yuav tsum tau tsom rau thaum xaiv hnub ci diodes?

Ib, Hluav taws xob ua haujlwm tsis zoo: cov cim tseem ceeb uas txiav txim siab lub zog ua haujlwm thiab kev nyab xeeb
1. Forward voltage poob (Vf) thiab conduction poob
Forward voltage poob yog hais txog qhov voltage poob ntawm lub diode thaum lub sij hawm rau pem hauv ntej conduction, uas ncaj qha cuam tshuam lub zog conversion efficiency ntawm ib tug photovoltaic system. Siv 1000W photovoltaic array ua piv txwv, yog siv lub diode nrog Vf=0.5V, qhov kev poob qis yog 5W (sau suav txog 0.5% ntawm cov zis hluav taws xob); Yog tias ultra- qauv poob qis nrog Vf=0.3V raug xaiv, qhov poob tuaj yeem raug txo mus rau 3W, thiab kev txuag hluav taws xob txhua xyoo tuaj yeem tshaj 20 kWh (xws li raws li qhov nruab nrab lub zog hluav taws xob txhua hnub ntawm 5 teev).

Kev lag luam Trends:

Silicon carbide (SiC) diodes, nrog lawv cov yam ntxwv Vf qis (0.2-0.3V), tau maj mam hloov cov tshuaj silicon-based diodes thiab tau siv dav hauv cov chaw nres tsheb hauv av loj.
Raws li cov ntaub ntawv los ntawm ib lub chaw tsim tshuaj paus photovoltaic inverter, kev siv SiC diodes nce system efficiency los ntawm 0.8% thiab txo LCOE (levelized nqi hluav taws xob) los ntawm 3.2%.
2. Rov qab lub sij hawm rov qab (Trr) thiab siab - zaus poob
Nyob rau hauv MPPT (Maximum Power Point Tracking) tswj ntawm photovoltaic arrays, diodes yuav tsum nquag hloov rau / tawm xeev. Lub sijhawm rov qab rov qab ntev tuaj yeem ua rau muaj qhov nce ntxiv hauv kev hloov pauv thiab txawm tias ua rau muaj kev cuam tshuam electromagnetic (EMI). Piv txwv li, ntawm kev hloov zaus ntawm 10kHz, lub diode poob ntawm Trr=100ns yog 40% siab dua li ntawm tus qauv Trr=50ns.

Kev xaiv tswv yim:

Qhov tseem ceeb yuav tsum tau muab rau cov diodes rov qab sai (FRDs) lossis ultrafast rov qab diodes (SRDs) nrog Trr Tsawg dua lossis sib npaug li 50ns, tshwj xeeb tshaj yog tsim rau siab - cov ntawv thov zaus xws li cov hlua inverters.
Cov ntaub ntawv kawm ntawm 50MW photovoltaic fais fab chaw nres tsheb qhia tau hais tias los ntawm optimizing lub diode Trr tsis, lub zog txhua xyoo ntawm lub system yuav nce 1.2%, uas yog sib npaug rau txo carbon emissions los ntawm 800 tons.
3. Rov qab tawg qhov hluav taws xob (Vbr) thiab cov npoo kev nyab xeeb
Qhov hluav taws xob thim rov qab yog qhov siab tshaj qhov rov qab qhov hluav taws xob uas lub diode tuaj yeem tiv taus, uas yuav tsum siab tshaj qhov qhib hluav taws xob hluav taws xob (Voc) ntawm photovoltaic array thiab tawm ntawm kev nyab xeeb. Piv txwv li, rau ib qho array nrog Voc=600V, diodes nrog Vbr Ntau dua lossis sib npaug li 800V yuav tsum raug xaiv los tiv thaiv cov kev ua haujlwm hnyav xws li kev hloov pauv hluav taws xob thiab xob laim.

Cov qauv kev lag luam:

Tus qauv IEC 62109 xav kom lub diode Vbr yuav tsum muaj ntau dua lossis sib npaug li 1.25 npaug ntawm cov array Voc thiab yuav tsum xeem dhau qhov ntsuas kub ntawm -40℃rau +85℃.
Vim yog siv cov diodes nrog Vbr tsis txaus nyob rau hauv ib qho kev faib photovoltaic project, 30% ntawm cov khoom raug puas tsuaj tom qab xob laim ntaus, uas ua rau kev lag luam ncaj qha poob ntau tshaj 500000 yuan.
4. Rated tam sim no (Yog) thiab thermal tsim
Qhov ntsuas tam sim no yuav tsum them rau qhov siab tshaj plaws tso zis tam sim no ntawm photovoltaic array thiab coj mus rau hauv tus account qhov kub thiab txias. Piv txwv li, nyob rau hauv ib puag ncig ntawm 50 degree, qhov ntsuas tam sim no ntawm diode yuav tsum tau txo los ntawm 20% -30% piv rau 25 degree. Tsis tas li ntawd, qhov kev ua tau zoo ntawm cov cua sov yuav tsum raug ntsuas los ntawm kev ntsuas thermal (R θ JA) kom tsis txhob muaj kev puas tsuaj los ntawm overheating.

Thermal Management Plan:

Los ntawm kev siv tooj liab substrates los yog cov dab dej kub kom txo tau cov thermal resistance, lub tsev photovoltaic system optimized nws cov cua sov dissipation tsim, txo cov diode hlws ris kub los ntawm 15℃thiab ncua nws lifespan los ntawm peb zaug.
Nws raug nquahu kom xaiv qhov chaw mount diodes nrog R θ JA Tsawg dua lossis sib npaug li 10℃/ W, uas tsim nyog rau qhov chaw txwv micro inverter scenarios.
2, Environmental adaptability parameters: "tiv thaiv kev tiv thaiv" los tiv thaiv kev ua haujlwm hnyav
1. Ua haujlwm kub ntau (Tj)
Cov tshuab hluav taws xob photovoltaic feem ntau ntsib qhov kub ntawm -40℃rau +85℃, thiab diodes yuav tsum muaj kev ua haujlwm ruaj khov hauv qhov no. Piv txwv li, ntsuas cov ntaub ntawv los ntawm cov suab puam photovoltaic fais fab chaw nres tsheb qhia tau hais tias ib txwm diodes nce Vf los ntawm 15% ntawm qhov kub thiab txias, uas ua rau ib xyoos ib zaug poob ntawm 2.1% nyob rau hauv lub zog tsim; Qhov poob ntawm cov qauv kub dav dav (-55℃rau +175 degree) tsuas yog 0.3%.

Material Innovation:

Gallium nitride (GaN) diodes yog qhov kev xaiv zoo tshaj plaws rau kev siv siab - kub vim lawv cov yam ntxwv siab bandgap. Tom qab siv GaN diodes nyob rau hauv ib lub tsheb mounted photovoltaic system, qhov efficiency nce 5% ntawm 60 degree.
2. Kev tiv thaiv hluav taws xob (TID)
Rau qhov chaw photovoltaics lossis siab - qhov siab siab, diodes yuav tsum muaj peev xwm tiv thaiv Total Ionizing Dose (TID) hluav taws xob. Piv txwv li, aerospace qib diodes yuav tsum xeem dhau 100krad (Si) hluav taws xob kuaj xyuas kom ntseeg tau tias lawv qhov kev ua tau zoo tsis ua rau qis dua 10 xyoo hauv qhov chaw ib puag ncig.

Daim ntawv thov hauv av extension:

Qinghai Tibet Plateau photovoltaic fais fab chaw nres tsheb tau txo qhov module attenuation tus nqi los ntawm 0.8% / xyoo rau 0.3% / xyoo los ntawm kev xaiv cov qauv hluav taws xob tiv thaiv hluav taws xob, tsim kom muaj 12% hluav taws xob ntxiv thaum nws 25 xyoo lifecycle.
3. Kev tiv thaiv qib (IP)
Diodes ntsia sab nraum zoov yuav tsum muaj plua plav- pov thawj thiab tsis muaj dej, thiab IP65 thiab siab dua tuaj yeem tiv taus nag xob nag cua, xuab zeb thiab plua plav thiab lwm qhov chaw hnyav. Cov ntaub ntawv kawm ntawm lub chaw nres tsheb fais fab photovoltaic ntug hiav txwv qhia tau hais tias IP67 diodes muaj 100% dhau tus nqi hauv kev kuaj ntsev ntsev, thaum IP65 diodes muaj qhov ua tsis tiav ntawm 15%.

3, Reliability Performance index: qhov tseem ceeb ntawm kev txiav txim siab txog tus nqi ntawm lub neej
1. Failure rate (FIT) thiab MTBF
Failure In Time (FIT) yog hais txog cov kev ua tsis tiav uas tshwm sim txhua 1 billion teev, thiab MTBF (Lub Sijhawm Nruab Nrab Ntawm Kev Ua Tsis Taus) yog nws qhov sib txuam. Piv txwv li, lub diode nrog FIT=100 muaj MTBF ntawm 100000 teev (kwv yees li 11.4 xyoo), uas yog ntau dua li 25 xyoo tsim lub neej xav tau rau cov tshuab photovoltaic.

Cov ntaub ntawv kev lag luam:

Raws li kev txheeb cais los ntawm cov chaw tsim khoom lag luam, cov tshuab photovoltaic siv automotive qib diodes muaj qhov tsis ua haujlwm ntawm tsuas yog 0.2% hauv 5 xyoos, thaum cov qauv kev lag luam zoo tib yam muaj qhov tsis ua haujlwm ntawm 3.5%.
2. ESD tiv thaiv qib
Tib neeg lub cev electrostatic tawm (ESD) tuaj yeem ua rau cov diodes puas tsuaj, yog li nws yuav tsum xaiv cov qauv uas ua tau raws li HBM (tus qauv tib neeg lub cev) Ntau dua lossis sib npaug ntawm 8kV thiab CDM (tus qauv them nyiaj) Ntau dua lossis sib npaug rau 2kV cov cai. Raws li kev sim tiag tiag ntawm cov kab hluav taws xob photovoltaic module ntau lawm, qhov tsis xws luag ntawm diodes yam tsis muaj ESD tiv thaiv mus txog 5%, thaum tus qauv tiv thaiv tsuas yog 0.1%.

3. Daim ntawv pov thawj thiab ua raws li cov qauv
Qhov tseem ceeb tshaj plaws yuav tsum tau muab rau cov khoom lag luam uas tau dhau daim ntawv pov thawj thoob ntiaj teb xws li UL, T Ü V, CE, thiab lwm yam, kom ua raws li cov cai tswj kev nyab xeeb xws li IEC 62109 thiab IEC 61730. Ib txoj haujlwm photovoltaic xa tawm mus rau Tebchaws Europe tau raug ntes los ntawm kev lis kev cai vim diodes tsis dhau CE daim ntawv pov thawj, ua rau 2 lab xa khoom ncaj qha.

4, Kev txheeb xyuas tus nqi txiaj ntsig: 'txoj cai kub' rau kev sib npaug ntawm kev ua haujlwm thiab kev nqis peev
1. Tus nqi pib muag khoom vs. tag nrho cov nqi ntawm lub neej
Txawm hais tias chav tsev nqi ntawm SiC diodes yog 3-5 npaug ntawm cov qauv siv silicon, lawv cov kev txhim kho lub zog tuaj yeem cuam tshuam cov nqi ntxiv. Piv txwv li, tom qab siv SiC diodes nyob rau hauv 100MW fais fab chaw nres tsheb, thawj peev nyiaj tau nce los ntawm 8 lab yuan, tab sis cov nqi hluav taws xob tau txais kev cawmdim los ntawm 120 lab yuan nyob rau hauv 25 xyoo lifecycle, thiab IRR (internal tus nqi rov qab) nce los ntawm 2.3 feem pua.

2. Qhov sib npaug ntawm tus qauv thiab kev hloov kho
Cov khoom lag luam tuaj yeem txo qhov kev yuav khoom thiab cov nqi khoom muag, tab sis cov qauv tsim kho tuaj yeem ua tau zoo dua qhov kev xav tau tshwj xeeb. Piv txwv li, ib lub chaw tsim tshuaj paus micro inverter ntse nkag mus rau qhov chaw txwv Japanese lag luam los ntawm kev kho cov diodes qis thiab compressing cov khoom thickness ntawm 8 hli mus rau 3 hli.

3. Supply saw stability
Xaiv cov neeg muag khoom uas muaj peev xwm tsim tau txaus thiab lub voj voog xa khoom luv kom tsis txhob ncua qhov project los ntawm cov khoom tsis txaus. Lub tuam txhab TOP5 photovoltaic thoob ntiaj teb tau txo lub sijhawm xa khoom los ntawm 12 lub lis piam mus rau 4 lub lis piam thiab nce kev siv peev xwm txhua xyoo los ntawm 15% los ntawm kev tsim kom muaj kev cog lus nrog cov tuam txhab diode.

5, Kev lag luam rooj plaub: tswv yim tswv yim nyob rau hauv parameter xaiv
Case 1: "High kub phiaj xwm" rau suab puam Photovoltaic fais fab chaw nres tsheb
Lub chaw nres tsheb 500MW suab puam hauv Middle East tab tom ntsib kev sib tw ntawm qhov kub ntawm 60 degree. Ib txwm silicon-raws li diodes muaj kev nce hauv Vf thiab kev txuas ntxiv ntawm Trr ntawm qhov kub thiab txias, ua rau 1.8% txo qis hauv kev ua haujlwm. Los ntawm kev hloov mus rau GaN diodes (Vf=0.25V, Trr=30ns), qhov ua tau zoo tau nce mus rau 98.5% thiab lub zog hluav taws xob txhua xyoo tau nce 28 lab kWh.

Case 2: Qhov "anti-corrosion kiv puag ncig" ntawm offshore photovoltaics
Jiangsu Rudong offshore photovoltaic project siv IP68 tiv thaiv qib diodes, ua ke nrog nano txheej tshuab, kom ua tiav xoom tsis ua haujlwm nyob rau hauv 5 xyoo nyob rau hauv ib puag ncig nrog ntsev tsuag concentration ntau tshaj 5 npaug ntawm cov pa theem, thaum cov qauv ib txwm muaj ib xyoo tsis ua hauj lwm tus nqi ntawm 8%.

Case 3: Tus nqi optimization ntawm tsev neeg photovoltaics
Qee tsev neeg lub tshuab hluav taws xob photovoltaic siv qhov chaw mounted diodes nrog Vf=0.3V thiab R θ JA=8℃/W kom txo tau cov nqi hluav taws xob los ntawm 30% thaum tswj kev ua haujlwm, ua kom luv luv lub sijhawm peev nyiaj rov qab mus rau 6 xyoo.