I-Photovoltaic inverter (i-PV inverter okanye inverter yelanga) inokuguqula umbane oguquguqukayo we-DC oveliswa yi-photovoltaic (PV) iiphaneli zelanga zibe yi-inverter ene-alternating current (AC) frequency frequency of mains frequency, enokubuyiselwa kwinkqubo yothumelo lwamandla orhwebo, okanye inikezelwe kusetyenziso lwegridi yegridi.I-Photovoltaic inverter yenye ye-balance balance of system (BOS) kwi-photovoltaic array system, enokusetyenziswa kunye nezixhobo zombane jikelele ze-AC.Abaguquli belanga banemisebenzi ekhethekileyo ye-photovoltaic arrays, njengokulandelela indawo yamandla aphezulu kunye nokukhuselwa kwesiqithi.
Iziguquli zelanga zinokwahlulwa zibe ngamacandelo amathathu alandelayo:
Ii-inverters ezizimeleyo:Isetyenziswe kwiinkqubo ezizimeleyo, i-photovoltaic array ihlawulisa ibhetri, kwaye i-inverter isebenzisa i-voltage ye-DC yebhetri njengomthombo wamandla.Uninzi lwee-inverters ezizimeleyo zikwabandakanya iitshaja zebhetri ezinokutshaja ibhetri kumandla e-AC.Ngokuqhelekileyo, ii-inverters ezinjalo aziyichukumisi igridi kwaye ngoko ayifuni ukukhuselwa kwesiqithi.
Iziguquli zegridi:Umbane ophumayo we-inverter unokubuyiselwa kunikezelo lwamandla lwe-AC yorhwebo, ngoko ke i-export sine wave kufuneka ifane nesigaba, i-frequency kunye ne-voltage yobonelelo lwamandla.I-inverter edibeneyo yegridi inoyilo lokhuseleko, kwaye ukuba ayixhunyiwe kumandla ombane, umphumo uya kuvalwa ngokuzenzekelayo.Ukuba umbane wegridi awuphumeleli, i-inverter edibeneyo yegridi ayinayo umsebenzi wokuxhasa ukunikezelwa kwamandla.
Ii-inverters ezigcina ibhetri (Iinverters ezigcina ibhetri)ziziguquli ezikhethekileyo ezisebenzisa iibhetri njengomthombo wazo wamandla kwaye zisebenzisana netshaja yebhetri ukutshaja iibhetri.Ukuba kukho amandla amaninzi kakhulu, iya kutshajwa kwakhona kubonelelo lombane lwe-AC.Olu hlobo lwe-inverter lunokubonelela ngamandla e-AC kumthwalo ochaziweyo xa amandla egridi engaphumeleli, ngoko ke kufuneka abe nomsebenzi wokukhusela umphumo.
Inqaku eliphambili: Ukulandelela indawo yamandla aphezulu
Ii-inverters ze-Photovoltaic zisebenzisa iteknoloji ye-Maximum Power Point Tracking (MPPT) ukutsala amandla amaninzi avela kwiipaneli zelanga.Kukho ubudlelwane obunzima phakathi kwe-solar irradiance, iqondo lokushisa kunye nokuchasana ngokupheleleyo kweeseli zelanga, ngoko ke ukusebenza kakuhle kwemveliso kuya kutshintsha ukungabikho komgca, okubizwa ngokuba yi-curve-voltage curve (IV curve).Injongo yokulandelela ubuninzi bamandla ombane kukuvelisa ukuchasana komthwalo (kwimodyuli yelanga) ukufumana amandla amaninzi ngokwemveliso yemodyuli yelanga kwindawo nganye.
Ifom yefom (FF) yeseli yelanga ngokudibanisa nombane wayo ovulekileyo wesiphaluka (VOC) kunye ne-short circuit current (ISC) iya kugqiba amandla amakhulu eeseli zelanga.Ubume bemilo buchazwa njengomlinganiselo wamandla aphezulu weseli yelanga eyahlulwe yimveliso yeVOC kunye ne-ISC.
Kukho iindlela ezintathu ezahlukeneyo zokulandela umkhondo wamandla aphezulu:i-perturb-and-observe, i-concremental conductance, kunye ne-voltage engaguqukiyo.Ezimbini zokuqala zihlala zibizwa ngokuba "kukunyuka induli".Indlela kukulandela igophe lamandla ombane ngokuchasene namandla.Ukuba iwela ngakwesobunxele kwindawo ephezulu yamandla, yongeza i-voltage, kwaye ukuba iwela ngasekunene kwendawo ephezulu yamandla, yehlisa i-voltage.
Izilawuli zokutshaja zinokusetyenziswa kunye neepaneli zelanga kunye nezixhobo ezisebenza ngamandla eDC.Umlawuli wentlawulo unokubonelela ngemveliso yamandla e-DC ezinzileyo, ugcine amandla angaphezulu kwibhetri, kwaye ubeke iliso kwintlawulo yebhetri ukunqanda ukutshajiswa okanye ukukhupha kakhulu.Ukuba ezinye iimodyuli ezibiza kakhulu zinokuxhasa iMPPT.I-inverter inokudityaniswa kwisiphumo somlawuli wentlawulo yelanga, kwaye ke i-inverter inokuqhuba umthwalo we-AC.
Ixesha lokuposa: Sep-15-2022
