Kwiminyaka yakutshanje, iteknoloji yeimboni ye-photovoltaiciphuhliswe ngokukhawuleza nangokukhawuleza.Amandla eemodyuli ezingatshatanga ziye zaba zikhulu kwaye zikhulu, kwaye i-current of the string iye yaba nkulu kwaye inkulu.Imodyuli yangoku yeemodyuli zamandla aphezulu ifikelele ngaphezu kwe-17A.Ngokumalunga noyilo lwenkqubo, ukusetyenziswa kwamacandelo anamandla aphezulu kunye nendawo egciniweyo efanelekileyo kunokunciphisa iindleko zokuqala zotyalo-mali kunye neendleko zeyure ze-kilowatt zenkqubo.Iindleko zeentambo ze-AC kunye ne-DC kwinkqubo ayikho phantsi.Uyilo kunye nokukhethwa kufuneka kuqhutywe njani ukunciphisa iindleko?
1. Ukukhethwa kweentambo zeDC
Intambo yeDC ifakwe ngaphandle.Ngokuqhelekileyo kucetyiswa ukuba ukhethe iintambo ezikhethekileyo ze-photovoltaic eziye zadibaniswa yi-radiation.Emva kokukhanya kwe-electron-energy high-energy, i-molecular structure ye-cable insulation layer material itshintsha ukusuka kwi-linear ukuya kwi-3-dimensional network ye-molecular structure, kwaye inqanaba lokumelana nobushushu liyenyuka ukusuka kwi-non-cross-linked 70 ° C ukuya kwi-90 ° C, i-105 ° C. C, 125 ° C, 135 ° C, Ukuya kuthi ga kwi-150 ° C, umthamo wangoku wokuthwala uphezulu kwi-15-50% ngaphezu kweentambo zeenkcukacha ezifanayo.Iyakwazi ukumelana notshintsho olumandla lobushushu kunye nokhukuliseko lwekhemikhali kwaye ingasetyenziswa ngaphandle ngaphezu kweminyaka engama-25.Xa ukhetha iintambo ze-DC, khetha iimveliso ezivela kubakhiqizi abaqhelekileyo abaneziqinisekiso ezifanelekileyo zokuqinisekisa ukusetyenziswa kwexesha elide ngaphandle.
Okwangoku, eyona isetyenziswa kakhuluphotovoltaic intambo yeDCyiPV1-F1*4 4 4 square metre cable.Nangona kunjalo, ngokunyuka kwangoku kweemodyuli ze-photovoltaic kunye nokunyuka kwamandla e-inverter enye, ubude bekhebula le-DC buye lwanda.Iimitha ezi-6 zesikwere Ukusetyenziswa kweentambo ze-DC kuyanda.
Ngokweenkcukacha ezifanelekileyo, ngokuqhelekileyo kucetyiswa ukuba ukulahlekelwa kwe-photovoltaic DC akufanele kudlule i-2%.Sisebenzisa lo mgangatho ukuyila indlela yokukhetha iintambo zeDC.Ukuxhathisa kumgca wePV1-F1 * 4mm² DC intambo yi-4.6mΩ/imitha, kwaye ukuxhathisa komgca wePV6mm² DC intambo yi-3.1 mΩ/imitha, kucingelwa ukuba imodyuli ye-DC yokusebenza kwamandla ombane yi-600V, i-2% ilahleko yokuhla kwamandla ombane yi-12V, kucingelwa ukuba ukuba imodyuli yangoku yi-13A, isebenzisa i-4mm² intambo ye-DC, umgama phakathi kwesiphelo esikude semodyuli kunye ne-inverter iyacetyiswa ukuba ingagqithisi i-120 yeemitha (umtya omnye, (ngaphandle kweepali ezilungileyo nezingalunganga), ukuba umgama mkhulu kunoko. umgama, kucetyiswa ukuba ukhethe i-6mm² intambo ye-DC, kodwa kucetyiswa ukuba umgama phakathi kweyona ndawo ikude yecandelo kunye ne-inverter akufanele idlule i-170 yeemitha.
2. I-photovoltaic cable loss loss calculation
Ukuze kuncitshiswe iindleko zenkqubo, amacandelo kunyeii-inverters zezikhululo zamandla e-photovoltaicazifane zimiselwe kumlinganiselo we-1:1.Endaweni yoko, uhlengahlengiso oluthile olungaphezulu luyilwe ngokusekelwe kwiimeko zokukhanyisa, iimfuno zeprojekthi, njl. 158A.Intambo ye-AC inokukhethwa ngokusekelwe kubuninzi bemveliso yangokuinverter.Ngenxa yokuba kungakhathaliseki ukuba mangaphi amacandelo acwangcisiweyo, i-AC input current ye-inverter ayinakuze idlule ubuninzi bemveliso yangoku ye-inverter.
3. Iiparamitha zemveliso ye-Inverter AC
Iintambo zobhedu ezisetyenziswa ngokuqhelekileyo kwiinkqubo ze-photovoltaic ziquka i-BVR kunye ne-YJV.I-BVR ithetha i-copper core ye-PVC efakwe kwi-flexible wire, YJV cross-linked polyethylene insulated power cable.Xa ukhetha, nikela ingqalelo kwinqanaba lombane kunye neqondo lokushisa kwentambo., ukukhetha uhlobo lwe-flame-retardant, ukucaciswa kwentambo kubonakaliswe ngenani le-cores, i-cross-section kunye nenqanaba le-voltage: I-single-core branch ye-cable yokumelwa kwenkcazo, i-1 * i-cross-section, njenge: 1 * 25mm 0.6 /1kV, ithetha i-25 square meter yeentambo.Multi-core twisted intambo yesebe ukumelwa ukumelwa, inani leentambo kwisekethe efanayo * igama cross-icandelo, ezifana: 3*50+2*25mm 0.6/1KV, okuthetha ezintathu 50 iingcingo eziphilayo eziphilayo, enye 25 square wire neutral neutral. kunye nocingo oluyi-25 square metres.
Ixesha lokuposa: Mar-20-2024