Kwiminyaka yakutshanje, iteknoloji yemboni ye-photovoltaic iye yaphuhliswa ngokukhawuleza kwaye ngokukhawuleza, amandla eenxalenye ezingatshatanga ziye zaba zikhulu kwaye zikhulu, i-current of strings iye yaba nkulu kwaye ikhudlwana, kwaye ngoku kwamacandelo anamandla aphezulu afikelele ngaphezu kwe. 17A.
Ngokumalunga noyilo lwenkqubo, ukusetyenziswa kwamacandelo anamandla aphezulu kunye nokulinganisa ngokufanelekileyo kunokunciphisa iindleko zokuqala zotyalo-mali kunye neendleko nge-kilowatt-yure yenkqubo.
Iindleko zeentambo ze-AC kunye ne-DC kwisistim zenza umlinganiselo omkhulu.Uyilo kunye nokukhethwa kufuneka kuncitshiswe njani ukunciphisa iindleko?
Ukukhethwa kweentambo zeDC
Iintambo zeDC zifakwe ngaphandle.Ngokuqhelekileyo kucetyiswa ukuba ukhethe i-irradiated and cross-linked photovoltaic iintambo ezikhethekileyo.
Emva kokukhanya kwe-electron beam ephezulu yamandla, ubume bemolekyuli ye-insulation layer ye-cable itshintsha ukusuka kumgca ukuya kwi-mesh-dimensional mesh isakhiwo semolekyuli, kunye nenqanaba lokumelana nobushushu liyenyuka ukusuka kwi-70 ℃ engadityaniswanga ukuya kwi-90 ℃, i-105 ℃ , 125℃, 135℃, kunye ne-150℃, eyi-15-50% ephezulu kunomthamo wangoku wokuthwala iintambo zeenkcukacha ezifanayo.
Iyakwazi ukumelana nokutshintsha kwamaqondo obushushu kunye nokhukuliseko lwekhemikhali kwaye inokusetyenziswa ngaphandle ngaphezu kweminyaka engama-25.
Xa ukhetha iintambo ze-DC, kufuneka ukhethe iimveliso ezineziqinisekiso ezifanelekileyo ezivela kubavelisi abaqhelekileyo ukuqinisekisa ukusetyenziswa kwangaphandle kwexesha elide.
Eyona isetyenziswa ngokuqhelekileyo photovoltaic intambo yeDC yi-PV1-F 1 * 4 4 intambo yesikwere.Nangona kunjalo, ngokunyuka kwemodyuli ye-photovoltaic yangoku kunye nokunyuka kwamandla okuguqula enye, ubude bentambo ye-DC buye banda, kwaye ukusetyenziswa kwe-6 square cable ye-DC kuyanda.
Ngokweenkcukacha ezifanelekileyo, ngokuqhelekileyo kucetyiswa ukuba ukulahlekelwa kwe-photovoltaic DC akufanele kudlule i-2%.Sisebenzisa lo mgangatho ukuyila indlela yokukhetha intambo ye-DC.
Ukuxhatshazwa komgca we-PV1-F 1 * 4mm2 DC ikhebula yi-4.6mΩ / imitha, kunye nokumelana nomgca we-PV 6mm2 DC ikhebula yi-3.1mΩ / imitha.Ukucinga ukuba i-voltage yokusebenza yemodyuli ye-DC yi-600V, ilahleko ye-voltage drop drop ye-2% yi-12V.
Ukucinga ukuba imodyuli yangoku yi-13A, usebenzisa i-4mm2 ikhebula le-DC, umgama ukusuka ekupheleni kwemodyuli ukuya kwi-inverter inconywa ukuba ingadluli i-120 yeemitha (umtya omnye, ngaphandle kweepali ezilungileyo kunye nezibi).
Ukuba kukhulu kunomgama, kucetyiswa ukuba ukhethe i-6mm2 intambo ye-DC, kodwa kucetyiswa ukuba umgama ukusuka ekupheleni kwemodyuli ukuya kwi-inverter ayikho ngaphezu kweemitha ezili-170.
Ukukhethwa kweentambo ze-AC
Ukuze kuncitshiswe iindleko zenkqubo, amacandelo kunye ne-inverters yezikhululo zamandla e-photovoltaic azifane zicwangciswe kwi-1: umlinganiselo we-1.Endaweni yoko, umlinganiselo othile wokulinganisa ngokugqithisileyo ulungiselelwe ngokwemiqathango yokukhanyisa, iimfuno zeprojekthi, njl.
Umzekelo, kwi-110KW icandelo, i-100KW inverter ikhethiwe.Ngokutsho kwamaxesha e-1.1 ngaphezulu kwe-calculation calculation on the AC side of inverter, ubuninzi be-AC output current malunga ne-158A.
Ukukhethwa kweentambo ze-AC kunokumiselwa ngokuhambelana nobuninzi bemveliso yangoku ye-inverter.Ngenxa yokuba kungakhathaliseki ukuba zininzi kangakanani izinto ezihambelanayo, i-current inverter AC input ayisoze yadlula ubuninzi bemveliso yangoku ye-inverter.
Isetyenziswa ngokuqhelekileyo inkqubo photovoltaic iintambo zethusi AC ziquka BVR kunye YJV kunye nezinye iimodeli.I-BVR ithetha i-copper core polyvinyl chloride insulated soft wire, YJV cross-linked polyethylene insulated power cable.
Xa ukhetha, nikela ingqalelo kwinqanaba lombane kunye neqondo lokushisa kwentambo.Khetha uhlobo lwe-flame-retardant.Inkcazo yekhebula ibonakaliswe ngenombolo engundoqo, i-cross-section kunye nenqanaba le-voltage: i-single-core branch inkcazo yenkcazo ye-cable, i-1 * i-cross-section ye-nominal, njenge: 1 * 25mm 0.6 / 1kV, ebonisa i-cable ye-square ye-25.
Ukucaciswa kweentambo zesebe ezijijekileyo ezininzi: inani leentambo ezikwi-loop enye * i-cross-section ebizwa ngokuba yi-nominal cross-section, efana ne: 3*50+2*25mm 0.6/1KV, ebonisa i-3 50 iingcingo ezisikweri eziphilayo, i-25 square wire neutral kunye i-25 square wire emhlabeni.
Uthini umahluko phakathi kwentambo engundoqo enye kunye nentambo engundoqo?
Intambo yondoqo omnye ibhekisa kwintambo ene-conductor enye kuphela kumaleko wokugquma.Iintambo ezininzi ezingundoqo zibhekiselele kwintambo enondoqo ogqunyiweyo ongaphezulu kwesinye.Ngokubhekiselele ekusebenzeni kwe-insulation, zombini i-single-core kunye nee-multi-core cables kufuneka zihlangabezane nemigangatho yelizwe.
Umahluko phakathi kwe-multi-core cable kunye ne-single-core cable kukuba ikhebula elilodwa-core lisekelwe ngokuthe ngqo kwiziphelo zombini, kwaye i-metal shielding layer ye-cable inokuvelisa ngoku okujikelezayo, okubangela ilahleko;
Intambo ye-Multi-core ngokubanzi iyintambo engundoqo-ntathu, kuba ngexesha lokusebenza kwentambo, isimbuku semisinga ehamba phakathi kwee-cores ezintathu ngu-zero, kwaye akukho mbane owenziweyo kuzo zombini iziphelo zomaleko okhusela intsimbi.
Ukusuka kwimbono yomthamo wesekethe, kwiintambo ezingundoqo kunye ne-multi-core, umthamo olinganisiweyo wangoku wokuthwala i-single-core cables inkulu kuneentambo ezintathu ezinqamlekileyo zecandelo elifanayo;
Ukusebenza kokutshitshiswa kobushushu kwiintambo ezingundoqo enye inkulu kuneentambo ezininzi.Ngaphantsi komthwalo ofanayo okanye iimeko zeesekethe ezimfutshane, ukushisa okwenziwa ngeentambo ze-single-core zingaphantsi kweentambo ezininzi, ezikhuselekileyo;
Ukusuka kwimbono yokubeka ikhebula, iintambo ezininzi zilula ukubeka, kunye neentambo ezinokhuseleko lwangaphakathi kunye ne-multi-layer-layer-layer zikhuselekile;Iingcingo ezingundoqo zilula ukugoba ngexesha lokubeka, kodwa ubunzima bokubeka phezu kwemigama emide bukhulu kwiintambo ezingundoqo enye kuneentambo ezininzi.
Ukususela kumbono wofakelo lwentloko yentambo, iintloko ze-cable-core zilula ukuzifaka kwaye zilungele ulwahlulo lomgca.Ngokwexabiso, ixabiso leyunithi yeentambo ze-multi-core liphezulu kancinane kuneentambo ze-single-core.
Izakhono zocingo ze-Photovoltaic
Imigca yenkqubo ye-photovoltaic ihlulwe kwiingxenye ze-DC kunye ne-AC.La malungu mabini kufuneka afakwe iintambo ngokwahlukeneyo.Inxalenye ye-DC idibaniswe kumacandelo, kwaye inxalenye ye-AC idibaniswe negridi yamandla.
Zininzi iintambo zeDC kwizikhululo zamandla eziphakathi nezinkulu.Ukuze kuququzelelwe ukugcinwa kwexesha elizayo, iinombolo zomgca wekhebula ngalinye kufuneka zifakwe ngokuqinileyo.Iintambo zamandla ezinamandla nezibuthathaka ziyahlukana.Ukuba kukho iilayini zesignali, ezifana nonxibelelwano lwe-485, kufuneka zihanjiswe ngokwahlukeneyo ukuphepha ukuphazamiseka.
Xa uhambisa iingcingo, lungisa ii-conduits kunye neebhulorho.Zama ukungavezi iingcingo.Kuya kubonakala ngcono ukuba iingcingo zihanjiswa ngokuthe tye kwaye ngokuthe nkqo.Zama ukuba kungabikho iintambo zeentambo kwii-conduits kunye neebhulorho kuba azikho lula ukuzigcina.Ukuba iingcingo ze-aluminiyam zithatha indawo yeengcingo zobhedu, kufuneka kusetyenziswe iiadaptha ezithembekileyo zobhedu-aluminiyam.
Kuyo yonke inkqubo ye-photovoltaic, iintambo ziyinxalenye ebaluleke kakhulu, kwaye isabelo sabo seendleko kwinkqubo siyanda.Xa siyila isikhululo samandla, kufuneka songe iindleko zenkqubo kangangoko sinakho ngelixa siqinisekisa ukusebenza okuthembekileyo kwesikhululo samandla.
Ngoko ke, ukuyila kunye nokukhethwa kweentambo ze-AC kunye ne-DC kwiinkqubo ze-photovoltaic zibaluleke kakhulu.
Nceda uzive ukhululekile ukuqhagamshelana nathi ngolwazi oluthe vetshe malunga neentambo zelanga.
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Ixesha lokuposa: Jun-17-2024
