Photovoltaic inverter (PV inverter lossis hnub ci inverter) tuaj yeem hloov pauv qhov sib txawv ntawm DC voltage tsim los ntawm photovoltaic (PV) hnub ci vaj huam sib luag rau hauv inverter nrog alternating tam sim no (AC) zaus ntawm mains zaus, uas tuaj yeem muab rov qab rau hauv kev lag luam fais fab kis, lossis nkag mus rau kev siv kab sib chaws ntawm daim phiaj.Photovoltaic inverter yog ib qho tseem ceeb ntawm kev sib npaug ntawm qhov system (BOS) hauv photovoltaic array system, uas tuaj yeem siv nrog cov khoom siv hluav taws xob AC.Hnub ci inverters muaj kev ua haujlwm tshwj xeeb rau photovoltaic arrays, xws li qhov siab tshaj plaws lub zog taw tes nrhiav thiab tiv thaiv Islanding.
Hnub ci inverters tuaj yeem muab faib ua peb pawg hauv qab no:
Stand-alone inverter:Siv nyob rau hauv kev ywj pheej systems, lub photovoltaic array tsub lub roj teeb, thiab lub inverter siv lub DC voltage ntawm lub roj teeb raws li lub zog qhov chaw.Ntau lub inverters nyob ib leeg kuj suav nrog cov roj teeb uas tuaj yeem them lub roj teeb los ntawm AC lub zog.Feem ntau, xws li inverters tsis kov daim phiaj thiab yog li tsis tas yuav muaj kev tiv thaiv kev tiv thaiv.
Daim phiaj-ci inverter:Cov zis hluav taws xob ntawm lub inverter tuaj yeem xa rov qab mus rau kev lag luam AC fais fab mov, yog li cov zis sine yoj yuav tsum zoo ib yam li theem, zaus thiab qhov hluav taws xob ntawm lub zog hluav taws xob.Daim phiaj-txuas inverter muaj kev ruaj ntseg tsim, thiab yog tias nws tsis txuas nrog lub hwj huam mov, cov zis yuav raug kaw.Yog tias daim phiaj hluav taws xob tsis ua haujlwm, daim phiaj-txuas inverter tsis muaj kev ua haujlwm ntawm thaub qab cov khoom siv hluav taws xob.
Roj teeb thaub qab inverter (Battery backup inverter)yog cov inverters tshwj xeeb uas siv cov roj teeb ua lawv lub zog thiab koom tes nrog lub roj teeb charger kom them cov roj teeb.Yog tias muaj hwj chim ntau dhau, nws yuav rov qab mus rau AC fais fab mov.Hom inverter no tuaj yeem muab AC lub zog rau qhov teev tseg thaum lub zog hluav taws xob tsis ua haujlwm, yog li nws yuav tsum muaj cov khoom siv tiv thaiv kev tiv thaiv.
Lub ntsiab lus tseem ceeb: Qhov siab tshaj plaws lub zog taw tes taug qab
Photovoltaic inverters siv Maximum Power Point Tracking (MPPT) thev naus laus zis los kos lub zog siab tshaj plaws los ntawm lub hnub ci vaj huam sib luag.Muaj kev sib raug zoo ntawm hnub ci irradiance, kub thiab tag nrho cov kev tiv thaiv ntawm lub hnub ci hlwb, yog li cov zis efficiency yuav hloov tsis-linearly, uas yog hu ua tam sim no-voltage nkhaus (IV nkhaus).Lub hom phiaj ntawm qhov ntsuas lub zog siab tshaj plaws yog los tsim kom muaj kev tiv thaiv kev tiv thaiv (ntawm lub hnub ci module) kom tau txais lub zog siab tshaj plaws raws li cov zis ntawm lub hnub ci module hauv txhua qhov chaw.
Daim ntawv foos (FF) ntawm lub hnub ci cell ua ke nrog nws qhov qhib hluav taws xob hluav taws xob (VOC) thiab luv luv tam sim no (ISC) yuav txiav txim siab lub zog siab tshaj plaws ntawm lub hnub ci cell.Cov duab zoo yog txhais raws li qhov piv ntawm lub zog siab tshaj plaws ntawm lub hnub ci cell faib los ntawm cov khoom ntawm VOC thiab ISC.
Muaj peb qhov sib txawv algorithms rau qhov siab tshaj plaws lub zog taw tes taug qab:perturb-and-saib, incremental conductance, thiab tsis tu ncua voltage.Thawj ob feem ntau hu ua "kev nce toj".Txoj kev yog ua raws li qhov nkhaus ntawm qhov voltage piv rau lub zog.Yog hais tias nws poob rau sab laug ntawm qhov siab tshaj plaws lub zog taw tes, nce qhov voltage, thiab yog tias nws poob mus rau sab xis ntawm lub zog siab tshaj plaws, txo qhov voltage.
Cov khoom siv hluav taws xob tuaj yeem siv nrog cov hnub ci vaj huam sib luag nrog rau DC-powered li.Tus tswj kev them nqi tuaj yeem muab lub zog DC ruaj khov, khaws lub zog ntau dhau hauv lub roj teeb, thiab saib xyuas lub roj teeb kom tsis txhob overcharge lossis overdischarging.Yog tias qee cov qauv kim dua tuaj yeem txhawb MPPT.Lub inverter tuaj yeem txuas nrog cov zis ntawm lub hnub ci tswj hwm, thiab tom qab ntawd lub inverter tuaj yeem tsav lub AC load.
Post lub sij hawm: Sep-15-2022
