Txheej Txheem Tsim Tsim thiab Muaj Peev Xwm Peev Txheej
Tus tsim qauv ntawm cov hluav taws xob loj photovoltaic cia cov tshuab yuav tsum muaj kev xav txog ntau yam li cov phiaj xwm, thiab cov peev txheej hluav taws xob. Ib lub tshuab kos duab tau muab faib ua ob schemes: DC sab txuas thiab AC ib sab kev sib tw thiab cov xwm txheej sib tw.
The DC side coupling architecture directly connects the photovoltaic array with the energy storage system, eliminating the intermediate AC/DC conversion link. This architecture has a conversion efficiency of up to 98%, making it particularly suitable for new photovoltaic power plants. Its core components include: DC/DC converter (efficiency>98.5%), Kev Tswj Xyuas Roj Teeb (lub sijhawm ntsuas<500ms), DC combiner cabinet, etc. After adopting this scheme, the overall system efficiency of a 200MW power station increased by 3.2 percentage points.
Cov kev sib txuas lus sab txuas txuas txuas txuas nrog cov kab sib txuas los ntawm kev sib txuas lus (PCC), uas yog qhov tsim nyog dua rau kev hloov hluav taws xob uas twb muaj lawm. Qhov kev tsim qauv no tau nce siab dua thiab tuaj yeem tswj hwm ntawm photovoltaic thiab lub zog cia lub tshuab. Cov Khoom Siv Tseem Ceeb suav nrog Kev Hloov Puam (thd<3%), AC distribution cabinets, synchronous controllers, etc. A 150MW renovation project adopted this plan and completed system integration in just 45 days.
Kev teeb tsa muaj peev xwm yuav tsum ua raws li kev tshawb fawb preminiple:
1) kom cov kev hloov pauv hloov pauv rov qab, nws raug nquahu kom tsim lub zog hluav taws xob cia ntawm 15%}}}}% ntawm lub peev xwm txhim kho muaj peev xwm rau lub sijhawm ntawm {3}} teev. Cov ntaub ntawv tsom xam ntawm lub chaw nres tsheb fais fab hauv Xinjiang qhia tau hais tias yog 20% kev teeb tsa tuaj yeem txo volatility los ntawm 70%;
2) Thaum koom nrog cov kev cai tswj kev cai hauv ntau, lub peev xwm yuav tsum yog 3% {% ntawm cov chaw nres tsheb fais fab yuav tsum tsawg dua 1 thib ob. Cov kab sib chaws North Tuam Txhab yuav tsum tau tias cov kev cai tswj tau muaj peev xwm tswj tau tsawg kawg 15 feeb;
3) Peak Valley foob pob yuav tsum tau txiav txim siab raws li lub nroog hluav taws xob nqe nkhaus, feem ntau tau teeb tsa nrog {{1} teev lub zog cia. Kev tsom xam ntawm ib qhov project hauv Guangdong qhia tau tias cov peev txheej rov qab los ntawm {2} siab dua li ntawm qhov {{4} teev phiaj xwm.
Kev simulation optimization ntawm ib tug 3 {4}} 0mw photovoltaic lub chaw nres tsheb fais fab muaj cov kev xav tau ntawm cov kev cai sib xyaw ua ke. Txoj kev npaj no nce cov nyiaj tau los txhua xyoo ntawm lub zog hluav taws xob los ntawm 23% thiab ua tiav tus nqi sab hauv rov qab 16.8%.
Cov Khoom Siv Xaiv thiab Kev Ntsuas Cov Qauv
Kev xaiv cov roj teeb uas yuav tsum muaj kev txiav txim siab txog ntau yam kev ntsuas. Qhov kev xaiv tam sim no yog 280ah lithium iron phosphate roj teeb ntau tshaj li 400Wh \/ L thiab lub zog hnyav ntom ntawm 180Wh li cas. Cov ntsiab lus tseem ceeb ntawm cov roj teeb pob tsim xws li:
1) Txoj Kev Pab Pawg: Feem ntau tsim nrog 1p24S modules, nrog rau kev sib xyaw ntawm {. 4V, txhua lub roj teeb {modules;
2) Kev Tswj Cov Cua Sov: Cov kua cua txias ua kom txo qhov kub ntawm lub roj teeb kom tsawg dua 3 degree, txuag ntau dua 30% lub zog piv rau cov cua txias daws. Cov Flow Flow tus nqi yog tswj hwm ntawm {3}} l \/ min, thiab qhov sib txawv ntawm cov inlet thiab qhov hluav taws xob tsawg dua 5 degree;
3) Kev tiv thaiv kev nyab xeeb: Txhua tus qauv yog nruab nrog cov ntsiab lus kub thiab cov hluav taws xob nrhiav tau cov roj txuas ntxiv tau nce 1% lel.
PCS cov cuab yeej xaiv yuav tsum them sai sai rau:
1) Cov qauv tocology: qhov tsim qauv theem peb ua tiav tau ua tiav ntawm 99%, uas yog}}}. 8% siab dua ob-qib qauv. Qhov loj ntawm 500kw module tsuas yog 800 × 600 × 2200mm;
2) Daim phiaj xwm hloov tau: nws muaj cov kev txwv voltage ntawm ± 10% thiab ntau zaus yoog raws li} hz, thd<3%;
3) Kev Tiv Thaiv Kev Muaj Peev Xwm: Cov Qauv Kev Tiv Thaiv Kev Tiv Thaiv (Lub Sijhawm Ua Haujlwm<2s), reverse power protection (threshold adjustable), overclocking/underflocking protection, etc.
Cov ntsiab lus tseem ceeb ntawm kev tsim cov qauv txias:
1) Lub peev txheej cua txias ntawm chav ua kua txias tau teeb tsa ntawm 1.2 zaug lub zog hluav taws xob ntawm lub roj teeb, thiab ib qho chaw 1MWH yuav tsum tau {} kw ntawm muaj peev xwm txias;
2) The pipeline is made of stainless steel material, with a pressure bearing capacity of>{{0 {0}}. 6MPA thiab Flow Meter tseeb ntawm ± 2%;
3) Cov tswj hwm hluav taws xob tuaj yeem hloov kho lub zog cua txias ntawm SM thiab ntsuas kub, thiab lub zog txuag hom tuaj yeem txo qis kev siv zog los ntawm 40%.
Cov ntaub ntawv ntsuas ntsuas ntawm 250mW Project qhia tau hais tias kev ua tau zoo tag nrho ntawm lub roj teeb hluav taws xob yog 92.3%, nrog tus nqi siab txhua xyoo ntawm 1.7%; Cov PCS hloov zuj zus kev ua tau zoo yog 98.6%, nrog lub sijhawm teb ntawm 185ms; Lub kaw lus cua txias ua rau lub roj teeb ua haujlwm nyob rau hauv cov kev kub siab tshaj plaws (25 ± 3 degree), txuas ntxiv nws lifespan li 20%.
Kev Nyab Xeeb Kev Nyab Xeeb thiab Kev Tswj Xyuas Kev Tswj Xyuas
Kev ruaj ntseg tsim qauv yuav tsum tau tsim tsa ntawm ntau txoj kev tiv thaiv ntau qib:
1) Electrical safety: Photovoltaic dedicated circuit breakers (with a breaking capacity of 20kA) are installed on the DC side, and selective protection circuit breakers (with an action time gradient difference of>{{0 {0}}. 1s) tau nruab rau AC sab. Cov kev tiv thaiv xob laim ua tau raws li qhov yuav tsum tau ua ntawm IEC 62305, nrog kev tiv thaiv ntawm<4 Ω;
2) Kev Nyab Xeeb Roj Teeb: tau txais peb-theem kev tiv thaiv architecture (Cell →}}} {}. {{{80 ± 0.5v. 0.05v. Cov lus ceeb toom khiav tawm thermal khiav ceev no tuaj yeem tso lub tswb 30 feeb ua ntej;
3) Structural safety: The energy storage container meets the IP54 protection level and has a seismic fortification intensity of 8 degrees. The box adopts A60 fire protection standard, with a fire resistance limit of>1 teev.
Cov haujlwm ntawm kev ua haujlwm thiab kev tswj hwm cov txheej txheem suav nrog:
1) Kev Tswj Xyuas Cov Ntawv: Lub sijhawm sib sau ntawm cov ntaub ntawv los ntawm ntau tshaj 2000 xyuas cov ntsiab lus nrog tus nqi kho tshiab ntawm 100ms. Roj Teeb Noj Qab Haus Huv (SoH) Kev Ntsuas Yuam Kev<3%;
2) Kev txhaum kev kuaj mob: Cov kws kuaj mob lub cav raws li cov kws tshaj lij tuaj yeem txheeb xyuas 98% ntawm cov kev ua txhaum cai nrog cov qib sib luag;
3) Kev Txij Nkawm: Kwv yees qhov seem uas tshuav lub neej ntawm kev siv tshuab, teem sijhawm sijhawm txij nkawm ua ntej, thiab txo cov nqi tsis tau los ntawm 70%.
Kev ua haujlwm thiab kev kho cov ntaub ntawv ntawm qee qhov project qhia tau tias kev ua haujlwm ntse txo MTTR los ntawm 8 teev, thiab txo cov nqi lag luam thiab cov nqi txij nkawm los ntawm 40%. Los ntawm kev tshuaj ntsuam xyuas kom meej, roj teeb hloov kev txiav txim siab ua yuam kev yog tsawg dua 5%, zam kev hloov chaw los ntawm kev hloov ua ntej pib.
Cov tswv yim engineering cov kev sib tw thiab kev daws teeb meem
High Altitude cov phiaj xwm fim cov kev sib tw tshwj xeeb:
1) Cov cua nyias nyias cuam tshuam cov cua sov dissipation: ntawm qhov kev hloov pauv ntawm 3000 metre, huab cua ceev tsuas yog 70% ntawm qhov ntawd ntawm hiav txwv. Kev daws suav nrog: PCS derating (5% muaj peev xwm txo cov khoom siv), txhim kho cua sov dissipation tsim (30% nce ntxiv hauv tshav kub dissipation cheeb tsam);
2) Cov teeb meem hluav taws xob tshwm sim los ntawm cov cua siab qis: Tshwj xeeb tsim hluav taws xob sib txuas (nrog 20% nce hauv voltage kuj tau siv, thiab cov ntsiab lus sib txuas yog muab khi;
3) Muaj zog rau UV hluav taws xob: saum npoo ntawm lub thawv yog coated nrog anti UV cov khoom siv, thiab cov cables yog ua los ntawm huab cua resistant.
Kev ntsuas kom tiv nrog cov chaw kub heev:
1) Qhov chaw kub tsawg: Nruab ib lub zog hluav taws xob cua sov (hluav taws xob hluav taws xob (fais fab hluav taws xob (hwj huam kub (Fais fab} kw) rau preheat lub roj teeb mus rau saum toj 10 degree ua ntej them. Siv tsawg-kub electrolyte, tswj 80% muaj peev xwm ntawm -30 degree;
2) Qhov Kub Ib puag ncig: Lub peev cua cua txias ntawm cov kua txias ua kom nce los ntawm 20%, thiab lub thawv admination cov qauv rwb thaiv tsev. Kho cov nyiaj them thiab tawm tswv yim kom tsis txhob muaj zog ua haujlwm thaum lub sijhawm kub kub.
Kev daws rau cov chaw muaj zog hluav taws xob tsis muaj zog:
1) Configure SVG nrog 10% -15% muaj peev xwm los tswj thd tsis pub dhau 3%;
2) Siv cov tshuab virtualous (vsg) thev naus laus zis los muab Inertia kev txhawb nqa;
3) Txhim kho txoj kev tswj hwm thiab txwv lub zog hloov pauv mus rau hauv 5% \/ min.