The difference between grid-connected and off-grid solar power systems

Hnub ci photovoltaiccov chaw nres tsheb fais fab tau muab faib uaoff-grid (independent) systemsthiab daim phiaj sib txuas, thiab tam sim no kuv yuav qhia rau koj paub qhov txawv ntawm ob: Thaum cov neeg siv xaiv rau nruab hnub ci photovoltaic fais fab chaw nres tsheb, lawv yuav tsum xub paub meej tias kev siv off-grid hnub ci photovoltaic fais fab chaw nres tsheb lossis kab sib txuas hnub ci photovoltaic fais fab chaw nres tsheb , kev siv ntawm ob lub zog tsis zoo ib yam, ntawm chav kawm, muaj pes tsawg leeg ntawm lub hnub ci photovoltaic fais fab chaw nres tsheb tsis zoo ib yam, tus nqi kuj txawv heev.

(1)Off-gridhnub ci photovoltaic fais fab chaw nres tsheb, tseem hu ua ywj siab photovoltaic fais fab chaw nres tsheb, yog ib qho system uas tsis cia siab rau ntawm daim phiaj fais fab thiab ua haujlwm ntawm nws tus kheej. Nws yog tsuas yog tsim los ntawm photovoltaic hnub ci zog vaj huam sib luag, lub zog cia roj teeb, them nyiaj thiab tso tawm controllers, inverters thiab lwm yam khoom. Cov hluav taws xob tso tawm los ntawm photovoltaic hnub ci zog tsim vaj huam sib luag ntws ncaj qha rau hauv lub roj teeb thiab khaws cia. Thaum nws xav tau los muab cov hluav taws xob hluav taws xob, qhov ncaj qha tam sim no hauv lub roj teeb ntws los ntawm lub inverter thiab hloov mus rau 220V alternating tam sim no, uas yog lub voj voog rov ua dua ntawm cov nqi thiab cov txheej txheem tawm. Hom photovoltaic hnub ci fais fab chaw nres tsheb yog dav siv vim nws tsis txwv los ntawm cheeb tsam. Nws tuaj yeem ntsia tau thiab siv txhua qhov chaw uas lub hnub ci. Yog li ntawd, nws yog qhov tsim nyog rau thaj chaw deb tsis muaj kab hluav taws xob, cov Islands tuaj sib cais, cov nkoj nuv ntses, cov chaw yug tsiaj sab nraum zoov, thiab tseem tuaj yeem siv los ua cov khoom siv hluav taws xob thaum muaj xwm txheej ceev hauv thaj chaw uas muaj hluav taws xob tsis tu ncua.

Off-grid photovoltaic solar power stations account rau 30-50% ntawm tus nqi tsim khoom vim lawv yuav tsum tau nruab nrog cov roj teeb. Thiab cov kev pab cuam lub neej ntawm lub roj teeb feem ntau yog nyob rau hauv 3-5 xyoo, tom qab uas nws yuav tsum tau hloov, uas ua rau kom tus nqi ntawm kev siv. Kev lag luam hais lus, nws yog qhov nyuaj kom tau txais ntau yam kev txhawb nqa thiab kev siv, yog li nws tsis haum rau siv nyob rau hauv qhov chaw uas hluav taws xob yooj yim.

Txawm li cas los xij, nws muaj peev xwm ua tau zoo rau cov tsev neeg hauv thaj chaw uas tsis muaj hluav taws xob lossis hluav taws xob tsis tu ncua. Tshwj xeeb tshaj yog txhawm rau daws teeb meem teeb pom kev zoo thaum lub zog tsis ua haujlwm, koj tuaj yeem siv DC lub zog txuag teeb, siv tau zoo heev. Yog li ntawd, off-grid photovoltaic solar power stations yog tshwj xeeb tshaj yog rau siv nyob rau hauv ungrid cheeb tsam los yog cov cheeb tsam uas nquag fais fab tuag.

(2)Kab sib txuasphotovoltaic hnub ci fais fab chaw nres tsheb txhais tau hais tias nws yuav tsum tau txuas nrog pej xeem lub zog hluav taws xob, uas txhais tau hais tias lub hnub ci photovoltaic fais fab chaw nres tsheb, lub tsev fais fab hluav taws xob thiab daim phiaj hluav taws xob pej xeem txuas nrog ua ke. Qhov no yog lub hnub ci hluav taws xob photovoltaic uas yuav tsum tau tso siab rau daim phiaj hluav taws xob uas twb muaj lawm los ua haujlwm. Feem ntau yog tsim los ntawm photovoltaic hnub ci zog vaj huam sib luag thiab inverter, photovoltaic hnub ci zog vaj huam sib luag ncaj qha hloov mus rau 220V-380V los ntawm inverter

Hloov tam sim no kuj yog siv los txhawb cov khoom siv hauv tsev. Thaum lub ru tsev hnub ci cov nroj tsuag tsim hluav taws xob ntau dua li cov khoom siv, qhov ntau dhau raug xa mus rau pej xeem daim phiaj. Thaum cov zis tawm ntawm lub tsev photovoltaic fais fab chaw nres tsheb tsis tuaj yeem ua tau raws li cov kev xav tau ntawm cov khoom siv hauv tsev, nws tau txais rov qab los ntawm daim phiaj. Tag nrho cov txheej txheem yog ntse tswj, tsis muaj tib neeg hloov mus rau lossis tawm.