Tsev neeg lub DC / AC Power Ratio tsim kev daws teeb meem

Nyob rau hauv kev tsim ntawm lub chaw nres tsheb fais fab photovoltaic, qhov piv ntawm lub peev xwm nruab ntawm lub photovoltaic modules rau qhov ntsuas muaj peev xwm ntawm lub inverter yog DC / AC Fais fab piv,

Nyob rau hauv "Photovoltaic Power Generation System Efficiency Standard" tso tawm nyob rau hauv 2012, lub peev xwm piv tau tsim raws li 1: 1, tab sis vim yog lub teeb ntawm lub teeb thiab qhov kub thiab txias, photovoltaic modules tsis tuaj yeem ncav cuag. nominal hwj chim feem ntau ntawm lub sij hawm, thiab lub inverter yeej tag nrho cov khiav ntawm tsawg tshaj li qhov muaj peev xwm, thiab feem ntau ntawm lub sij hawm yog nyob rau theem ntawm nkim peev xwm.

Nyob rau hauv tus qauv tso tawm thaum kawg Lub Kaum Hli 2020, qhov muaj peev xwm piv ntawm photovoltaic fais fab nroj tsuag tau muaj kev ywj pheej tag nrho, thiab qhov siab tshaj plaws piv ntawm cov khoom thiab cov inverters mus txog 1.8: 1.Tus qauv tshiab yuav ua rau kom muaj kev xav tau hauv tsev rau cov khoom siv thiab cov inverter.Nws tuaj yeem txo tus nqi hluav taws xob thiab ua kom lub sijhawm tuaj txog ntawm lub sijhawm ntawm photovoltaic parity.

Daim ntawv no yuav coj cov txheej txheem photovoltaic faib hauv Shandong ua piv txwv, thiab tshuaj xyuas nws los ntawm qhov kev xav ntawm qhov tseeb tso zis hluav taws xob ntawm photovoltaic modules, qhov feem pua ​​​​ntawm kev poob los ntawm kev muab ntau dhau, thiab kev lag luam.

01

Qhov sib txawv ntawm over-provisioning ntawm solar panels

Tam sim no, qhov nruab nrab tshaj kev muab cov chaw tsim hluav taws xob photovoltaic hauv ntiaj teb yog nyob nruab nrab ntawm 120% thiab 140%.Qhov laj thawj tseem ceeb ntawm kev muab ntau tshaj yog tias PV modules tsis tuaj yeem ncav cuag lub zog siab tshaj plaws thaum lub sijhawm ua haujlwm tiag.Cov yam cuam tshuam muaj xws li:

1) Kev siv hluav taws xob tsis txaus (lub caij ntuj no)

2). Ambient kub

3) Kev thaiv av thiab plua plav

4) Solar module orientation tsis pom zoo nyob rau hauv ib hnub (txoj kev taug qab yog qhov tsawg dua)

5) Hnub ci module attenuation: 3% hauv thawj xyoo, 0.7% ib xyoos tom qab ntawd

6) Kev sib txuam poob hauv thiab nruab nrab ntawm cov hlua ntawm lub hnub ci modules

AC Power Ratio tsim kev daws teeb meem1

Lub zog tsim hluav taws xob niaj hnub nkhaus nrog qhov sib txawv tshaj qhov kev faib tawm

Nyob rau hauv xyoo tas los no, qhov kev faib ua ntau tshaj ntawm cov tshuab photovoltaic tau pom tias muaj kev nce ntxiv.

Ntxiv rau qhov laj thawj ntawm kev poob, qhov kev poob qis ntxiv ntawm cov nqi ntawm cov khoom siv hauv xyoo tas los no thiab kev txhim kho ntawm inverter technology tau ua rau muaj kev nce ntawm cov hlua uas tuaj yeem txuas tau, ua rau cov khoom siv ntau dua thiab kev txuag nyiaj ntau dua. , kev tshaj tawm ntawm cov khoom siv kuj tuaj yeem txo cov nqi hluav taws xob, yog li kev txhim kho cov nqi rov qab los ntawm qhov project, yog li kev tiv thaiv kev pheej hmoo ntawm kev nqis peev ntawm qhov project yog nce.

Tsis tas li ntawd, high-power photovoltaic modules tau dhau los ua tus qauv tseem ceeb hauv kev txhim kho kev lag luam photovoltaic nyob rau theem no, uas ua rau muaj peev xwm ua kom muaj peev xwm ntawm cov khoom siv ntau dhau thiab kev nce ntawm cov khoom siv hauv tsev photovoltaic.

Raws li cov xwm txheej saum toj no, kev npaj ntau dhau tau dhau los ua tus qauv ntawm kev tsim cov phiaj xwm photovoltaic.

02

Kev tsim hluav taws xob thiab kev txheeb xyuas tus nqi

Noj 6kW tsev neeg photovoltaic fais fab chaw nres tsheb nqis peev los ntawm tus tswv ua piv txwv, LONGi 540W modules, uas feem ntau siv hauv khw muag khoom, raug xaiv.Nws kwv yees tias qhov nruab nrab ntawm 20 kWh ntawm hluav taws xob tuaj yeem tsim tau ib hnub, thiab lub peev xwm tsim hluav taws xob txhua xyoo yog li 7,300 kWh.

Raws li cov khoom siv hluav taws xob tsis zoo, qhov ua haujlwm tam sim no ntawm qhov chaw ua haujlwm siab tshaj plaws yog 13A.Xaiv lub mainstream inverter GoodWe GW6000-DNS-30 ntawm kev ua lag luam.Qhov siab tshaj tawm tam sim no ntawm lub inverter no yog 16A, uas tuaj yeem hloov mus rau kev lag luam tam sim no.siab tam sim no Cheebtsam.Noj 30-xyoo tus nqi nruab nrab ntawm cov hluav taws xob txhua xyoo ntawm cov khoom siv hluav taws xob hauv Yantai City, Shandong Province raws li kev siv, ntau lub tshuab nrog ntau qhov sib txawv ntawm qhov sib txawv tau txheeb xyuas.

2.1 system efficiency

Ntawm qhov tod tes, kev npaj ntau dhau ua rau muaj kev tsim hluav taws xob ntau ntxiv, tab sis ntawm qhov tod tes, vim qhov nce ntawm cov hnub ci modules ntawm DC sab, qhov sib txuam poob ntawm lub hnub ci modules nyob rau hauv lub hnub ci txoj hlua thiab poob ntawm lub hnub ci modules. DC kab nce, yog li muaj qhov pom kev muaj peev xwm sib piv, ua kom lub zog ua haujlwm zoo tshaj plaws.Tom qab PVsyst simulation, qhov system efficiency nyob rau hauv txawv peev xwm piv ntawm 6kVA system tuaj yeem tau txais.Raws li pom nyob rau hauv cov lus hauv qab no, thaum lub peev xwm piv yog hais txog 1.1, qhov system efficiency nce mus txog qhov siab tshaj plaws, uas kuj txhais tau hais tias kev siv tus nqi ntawm cov khoom yog siab tshaj nyob rau lub sij hawm no.

AC Power Ratio tsim kev daws teeb meem 2

Kev ua tau zoo thiab kev tsim hluav taws xob txhua xyoo nrog cov peev txheej sib txawv

2.2 kev tsim hluav taws xob thiab nyiaj tau los

Raws li kev ua haujlwm zoo nyob rau hauv qhov sib txawv tshaj qhov sib piv thiab qhov theoretical decay tus nqi ntawm cov modules nyob rau hauv 20 xyoo, lub zog txhua xyoo nyob rau hauv txawv peev xwm-provisioning ratios tau.Raws li tus nqi hluav taws xob hauv kab hluav taws xob ntawm 0.395 yuan / kWh (tus nqi hluav taws xob ntsuas hluav taws xob rau desulfurized thee hauv Shandong), cov nyiaj tau los ntawm kev muag hluav taws xob txhua xyoo yog suav.Cov txiaj ntsig suav tau pom hauv cov lus saum toj no.

2.3 Kev txheeb xyuas tus nqi

Tus nqi yog dab tsi cov neeg siv khoom hauv tsev photovoltaic tej yaam num muaj kev txhawj xeeb ntau dua. Ntawm lawv, photovoltaic modules thiab inverters yog cov khoom siv tseem ceeb, thiab lwm yam khoom siv xws li photovoltaic brackets, cov cuab yeej tiv thaiv thiab cables, nrog rau cov nqi txuas rau qhov project. kev tsim kho. Tsis tas li ntawd, cov neeg siv kuj yuav tsum tau txiav txim siab tus nqi ntawm kev tswj xyuas photovoltaic fais fab nroj tsuag.Qhov nruab nrab tus nqi saib xyuas yog kwv yees li 1% mus rau 3% ntawm tag nrho cov nqi peev.Nyob rau hauv tag nrho cov nqi, photovoltaic modules account txog li 50% mus rau 60%.Raws li cov nqi siv nyiaj saum toj no, cov nqi tsev photovoltaic nqi tsev tam sim no yog kwv yees li qhia hauv cov lus hauv qab no:

AC Power Ratio tsim kev daws teeb meem 3

Kwv yees tus nqi ntawm cov tsev nyob PV Systems

Vim tias qhov sib txawv ntawm qhov sib txawv, tus nqi ntawm cov kab ke kuj tseem sib txawv, nrog rau cov khoom siv, cov hlua khi, DC cables, thiab cov nqi teeb tsa.Raws li cov lus saum toj no, tus nqi sib txawv ntawm qhov sib txawv ntawm qhov sib txawv tuaj yeem suav tau, raws li qhia hauv daim duab hauv qab no.

AC Power Ratio tsim kev daws teeb meem 4

Cov Nqi Them Nqi, Kev Pabcuam thiab Kev Ua Tau Zoo raws li qhov sib txawv ntawm qhov sib txawv

03

Incremental benefit analysis

Nws tuaj yeem pom los ntawm kev txheeb xyuas saum toj no tias txawm hais tias kev tsim hluav taws xob txhua xyoo thiab cov nyiaj tau los yuav nce ntxiv nrog qhov nce ntawm qhov kev faib tawm ntau dhau, tus nqi peev kuj tseem yuav nce ntxiv.Tsis tas li ntawd, cov lus saum toj no qhia tau hais tias qhov system efficiency yog 1.1 npaug tshaj qhov zoo tshaj plaws thaum ua khub.Yog li ntawd, los ntawm kev pom zoo, 1.1x qhov hnyav yog qhov zoo tshaj plaws.

Txawm li cas los xij, los ntawm kev xav ntawm cov tub ua lag luam, nws tsis txaus los xav txog kev tsim cov tshuab photovoltaic los ntawm kev pom kev.Nws tseem yuav tsum tau txheeb xyuas qhov cuam tshuam ntawm kev faib nyiaj ntau dhau ntawm cov peev nyiaj tau los ntawm kev xav txog nyiaj txiag.

Raws li tus nqi peev thiab cov nyiaj tau los tsim hluav taws xob raws li qhov sib txawv ntawm cov peev txheej saum toj no, tus nqi kWh ntawm lub kaw lus rau 20 xyoo thiab cov nqi se ua ntej ntawm cov nyiaj rov qab tuaj yeem suav tau.

AC Power Ratio tsim kev daws teeb meem 5

LCOE thiab IRR nyob rau hauv qhov sib txawv overprovisioning piv

Raws li tuaj yeem pom los ntawm daim duab saum toj no, thaum lub peev xwm faib qhov sib piv me me, lub zog tsim hluav taws xob thiab cov nyiaj tau los ntawm qhov system nce nrog qhov nce ntawm qhov peev xwm faib piv, thiab cov nyiaj tau los ntxiv rau lub sijhawm no tuaj yeem them tus nqi ntxiv vim dhau. allocation.Thaum lub peev xwm piv tau loj dhau lawm, tus nqi sab hauv ntawm qhov rov qab los ntawm lub kaw lus maj mam txo qis vim yog yam xws li kev maj mam nce hauv lub zog txwv ntawm qhov ntxiv thiab qhov nce hauv kab poob.Thaum lub peev xwm piv yog 1.5, tus nqi sab hauv ntawm rov qab IRR ntawm qhov system peev yog qhov loj tshaj plaws.Yog li ntawd, los ntawm kev pom kev lag luam, 1.5: 1 yog qhov zoo tshaj plaws muaj peev xwm piv rau qhov system no.

Los ntawm tib txoj kev raws li saum toj no, qhov zoo tshaj qhov muaj peev xwm piv tau ntawm cov kab ke nyob rau hauv cov peev txheej sib txawv yog xam los ntawm kev xav ntawm kev lag luam, thiab cov txiaj ntsig tau raws li hauv qab no:

AC Power Ratio tsim kev daws teeb meem 6

04

Epilogue

Los ntawm kev siv cov ntaub ntawv hnub ci ntawm Shandong, nyob rau hauv cov xwm txheej ntawm qhov sib txawv muaj peev xwm sib txawv, lub zog ntawm photovoltaic module tso zis ncav cuag lub inverter tom qab poob yog xam.Thaum lub peev xwm piv yog 1.1, qhov kev poob qis yog qhov tsawg tshaj plaws, thiab qhov kev siv cov khoom siv feem ntau yog qhov siab tshaj plaws nyob rau lub sijhawm no.Txawm li cas los xij, los ntawm kev pom kev lag luam, thaum lub peev xwm piv yog 1.5, cov nyiaj tau los ntawm cov phiaj xwm photovoltaic yog qhov siab tshaj plaws. .Thaum tsim cov txheej txheem photovoltaic, tsis yog tsuas yog kev siv tus nqi ntawm cov khoom raws li cov txheej txheem yuav tsum tau txiav txim siab, tab sis kuj yog kev lag luam yog tus yuam sij rau kev tsim qhov project.Los ntawm kev suav nyiaj txiag, 8kW system 1.3 yog qhov kev lag luam tshaj plaws thaum nws tshaj tawm, 10kW system 1.2 yog qhov kev lag luam tshaj plaws thaum nws tshaj tawm, thiab 15kW system 1.2 yog qhov kev lag luam tshaj plaws thaum nws tshaj tawm. .

Thaum tib txoj kev siv rau kev suav nyiaj txiag ntawm qhov muaj peev xwm sib piv hauv kev lag luam thiab kev lag luam, vim qhov txo qis ntawm tus nqi ib watt ntawm qhov system, qhov kev lag luam zoo tshaj qhov peev xwm yuav siab dua.Tsis tas li ntawd, vim yog vim li cas kev lag luam, tus nqi ntawm cov tshuab photovoltaic kuj yuav txawv heev, uas tseem yuav cuam tshuam rau kev suav ntawm qhov zoo tshaj plaws peev xwm piv.Qhov no kuj yog qhov laj thawj tseem ceeb vim li cas ntau lub teb chaws tau tshaj tawm cov kev txwv ntawm kev tsim peev txheej ntawm cov tshuab photovoltaic.


Post lub sij hawm: Sep-28-2022