Tham txog yuav ua li cas tsim off-grid photovoltaic system
01Basic cov ntaub ntawv uas yuav tsum tau to taub ua ntej installation
Ua ntej ntawm tag nrho cov, peb yuav tsum to taub tus neeg siv voltage theem. Puas yog ib-theem AC 220V lossis peb-theem AC 380V? Qhov no txiav txim qhov tso zis yam ntxwv ntawm lub inverter;
Qhov thib ob yog hom load, puas yog inductive load lossis resistive load? Qhov no txiav txim siab lub zog load thiab tso zis waveform ntawm lub inverter.
Qhov thib peb yog lub sijhawm ua haujlwm puv sijhawm ntawm kev thauj khoom, uas yog, peb xav tau pes tsawg degrees rau qhov nruab nrab txhua hnub siv hluav taws xob? Yog tias nws yog qhov chaw nres tsheb hluav taws xob photovoltaic txuas nrog, vim tias tsis muaj lub zog cia khoom, tsuas yog tsim nyog photovoltaic module fais fab tuag; Yog tias nws yog photovoltaic off-daim phiaj hluav taws xob tsim hluav taws xob, lub roj teeb muaj peev xwm yuav tsum tau suav nrog, suav nrog thaum tsis muaj lub zog hluav taws xob photovoltaic nyob rau hnub los nag tas mus li. Self-reserved hwj chim ntawm lub system.
02 Photovoltaic off-grid fais fab tsim rooj plaub
Peb coj lub photovoltaic off-grid fais fab chaw nres tsheb ntawm ib tug me me pas dej ua liaj ua teb ua piv txwv. Vim tias cov khoom siv hluav taws xob ntev ntev, lub zog poob thiab qhov hluav taws xob poob ntawm cov kab sib txuas yog qhov loj, thiab cov cua daj cua dub tsoo, ua rau lub zog tsis ruaj khov, tsis tshua muaj hluav taws xob tsis txaus ntseeg, thiab cuam tshuam rau kev tsim khoom thiab kev ua neej nyob. Vim li no, nws tau npaj los siv lub tshuab hluav taws xob photovoltaic off-grid zog. Lub hnub ci hluav taws xob siv hluav taws xob yog siab thaum nruab hnub, thiab lub zog hluav taws xob photovoltaic yog ncaj qha inverted thiab tso zis. Lub hwj huam mov ua haujlwm thiab them lub roj teeb tib lub sijhawm.
Qhov voltage yog AC220V 50Hz, thiab cov khoom siv hluav taws xob feem ntau suav nrog:
10 teeb lub twj tso kua mis oxygen rau cov ntses pas dej (300W)
TV + satellite receiver (200W) 1 teeb
1 khob mov (750W)
Induction Cooker (2000W) 1
1 lub tub yees (100W)
Teeb pom kev zoo (100W)
Lub load tsis siv tib lub sijhawm. Lub twj tso kua mis oxygen ua haujlwm thaum nruab hnub thaum lub hnub ci ntsa iab thiab tsis ua haujlwm hmo ntuj; Lub zog ntawm lwm yam khoom siv hluav taws xob yog li 3000W, thiab kev siv hluav taws xob txhua hnub yog li 10 degrees. Txij li thaum lub pas dej muaj lub hnub ci txaus, lub zog ntawm tus kheej tshwj xeeb hauv huab cua thiab hnub los nag tsis suav nrog.
03 Photovoltaic Inverter
Raws li cov ntaub ntawv saum toj no muab los ntawm tus neeg siv, hauv qhov kev tsim qauv no, SAKO Sanke? Off-grid photovoltaic inverter integrated tshuab raug xaiv, lub hwj chim yog 48V 6KVA, lub hwj chim yam yog 0.9, lub inverter conversion efficiency> 88%, thiab lub hwj chim loadable yog mus txog 5000W, tuaj yeem ntsib tus neeg siv [GG ] #39; cov khoom siv hluav taws xob tso zis hluav taws xob xav tau.
04 Roj teeb muaj peev xwm
Lub zog cia khoom siv nyob rau hauv lub tshuab hluav taws xob photovoltaic off-daim phiaj hluav taws xob yog ib qho siv lead-acid roj teeb uas muaj peev xwm loj thiab kev ua haujlwm siab.
Lub peev xwm cia ntawm lub roj teeb yog 10KWh. Txij li thaum DC input voltage ntawm lub photovoltaic inverter yog DC48V, lub theoretical muaj peev xwm ntawm lub roj teeb yog xam:
10000V / 48V=208Ah
Raws li cov txheej txheem kev qhia ntawm lub roj teeb, qhov tso tawm ntawm lub roj teeb yog qhov kev lag luam ntau dua thiab tsim nyog ntawm 0.5C2, uas tuaj yeem ua kom lub roj teeb' lub voj voog them thiab tawm lub sij hawm thiab ua kom muaj kev pab cuam lub neej. Vim tias lub pas dej muaj hnub ci txaus, cov khoom siv hluav taws xob photovoltaic tau ncaj qha rov qab thaum nruab hnub, thiab tsis tas yuav mus dhau ntawm cov txheej txheem rov ua dua ntawm lub roj teeb. Kev siv hluav taws xob thaum hmo ntuj me me thiab lub sij hawm tso tawm luv luv. Yog li ntawd, lub roj teeb tawm tus nqi yog tsim nyog nce mus rau 0.6C2 hauv kev tsim cov qauv no. Kev suav qhov muaj peev xwm tiag tiag:
208 Ah/0.6=347 Aw
Tus nqi ntawm no yog 400Ah, uas yog, tag nrho muaj peev xwm yog: 48V 400Ah
Qhov tshwj xeeb ntawm cov roj ntsha lead-acid yog 12V 200Ah / pc, hom kev sib txuas yog 4 txoj hlua thiab 4 qhov sib luag, thiab tag nrho ntawm 8 lub roj teeb yuav tsum tau ua.
05 PV module zog
Tom qab lub roj teeb configuration muaj peev xwm tau los ntawm kev suav sau saum toj no, lub zog teeb tsa ntawm photovoltaic module raug xam.
Qhov chaw thaj chaw ntawm lub pas dej muaj lub hnub ci hluav taws xob muaj zog, thiab lub hnub ci zoo yog ntev li 6 teev. Kev siv cov polycrystalline silicon photovoltaic modules muaj kev hloov pauv photoelectric ntawm 16%, uas ua tau raws li cov qauv tsim los ntawm National Energy Administration.
Kev suav cov mis rau kev tsim hluav taws xob photovoltaic yog: lub zog tsim hluav taws xob=photovoltaic module fais fab × hnub ci lub sij hawm × kev coefficient. Cov coefficient dav dav hais txog qhov poob coefficient tshwm sim los ntawm yam xws li kev hloov pauv kub, kab poob, thiab kev tswj hwm (lossis inverter) kev ua haujlwm zoo. Tus nqi feem ntau yog 0.5-0.7, thiab tus nqi yog 0.6 lub sijhawm no. Yog li ntawd, lub photovoltaic module fais fab suav nrog:
48V × 400Ah / (6h × 0.6)=5333W
Qhov tshwj xeeb ntawm lub module yog 36V 275W, qhov loj yog 1900 × 980 × 45mm, thiab thaj tsam yog li 2 square meters. Txoj kev sib txuas yog tias txhua 2 daim (72V) txuas nrog hauv cov kab, thiab tom qab ntawd 10 txoj hlua txuas nrog rau qhov sib npaug. Yuav tsum muaj tag nrho 20 daim photovoltaic modules, nrog rau tag nrho lub zog ntawm 72V 5500W thiab photovoltaic module array cheeb tsam ntawm 40 square meters.
