ISolar Inverter Ubalo lweMitya yoYilo
Inqaku elilandelayo liza kukunceda ukubala ubuninzi / ubuncinane benani leemodyuli ngothotho lomtya xa uyila inkqubo yakho yePV. Kwaye ubungakanani be-inverter bubandakanya iinxalenye ezimbini, i-voltage, kunye nobungakanani bangoku. Ngexesha lokulinganisa inverter kufuneka uthathele ingqalelo imida yoqwalaselo eyahlukeneyo, ekufuneka iqwalaselwe xa ulinganisa i-inverter yamandla elanga (Idatha evela kwi-inverter kunye ne-solar panel data sheets). Kwaye ngexesha lokulinganisa, i-coefficient yokushisa yinto ebalulekileyo.
1. Umlinganiso wobushushu bephaneli yelanga yeVoc / Isc:
I-voltage / yangoku ezisebenza kuyo iipaneli zelanga ixhomekeke kubushushu beseli, kokukhona iqondo lobushushu liphezulu kokukhona lisezantsi i-voltage / yangoku i-solar panel iya kuvelisa kwaye ngokuphambeneyo. I-voltage / yangoku yenkqubo iya kuhlala iphezulu kwezona meko zibandayo kwaye umzekelo, i-solar panel yobushushu be-coefficient ye-Voc iyafuneka ukwenza oku. Ngeephaneli zesola ze-mono kunye ne-poly crystalline isoloko ingumfanekiso ongalunganga we-%/oC, onje -0.33%/oC kwi-SUN 72P-35F. Olu lwazi lunokufumaneka kwiphepha ledatha yabavelisi bephaneli yelanga. Nceda ujonge kumfanekiso 2.
2. Inani leepaneli zelanga kumtya wothotho:
Xa iipaneli zelanga zifakwe kwiintambo zochungechunge (oko kukuthi i-positive yepaneli enye ixhunyiwe kwi-negative yepaneli elandelayo), i-voltage yepaneli nganye yongezwa kunye ukunika i-voltage yentambo epheleleyo. Ke ngoko kufuneka sazi ukuba zingaphi iiphaneli zelanga ozimisele ukuzifaka ngocingo kuthotho.
Xa unalo lonke ulwazi ulungele ukuyifaka kolu luhlu lulandelayo lobungakanani bombane wepaneli yelanga kunye nezibalo zangoku zesayizi ukuze ubone ukuba uyilo lwepaneli yelanga luya kuhambelana neemfuno zakho.
Ubungakanani bombane:
1. Ubuninzi bombane wendawo yolawulo =Voc*(1+(Min.temp-25)*i-coefficient yobushushu(Voc)
2. Inani eliphezulu leeSolar panels=Ubuninzi. Igalelo lombane / Ubuninzi bombane wepaneli
Ubungakanani bangoku:
1. Indawo yolawulo ephantsi =Isc*(1+(Max.temp-25)* icoefficient yobushushu(Isc)
2. Ubuninzi benani leentambo=Ubuninzi. igalelo langoku / Iphaneli encinci yangoku
3. Umzekelo:
I-Curitiba, isixeko saseBrazil, umthengi ulungele ukufaka enye i-Renac Power 5KW i-inverter yesigaba sesithathu, imodeli yepaneli yelanga yimodyuli ye-330W, ubushushu obusezantsi besixeko yi -3 ℃ kunye nobushushu obuphezulu yi-35 ℃, evulekileyo. I-voltage yesiphaluka i-45.5V, i-Vmpp yi-37.8V, i-inverter MPPT i-voltage ye-voltage yi-160V-950V, kwaye umbane ophezulu unokumelana ne-1000V.
I-Inverter kunye nedatha yedatha:
Uluhlu lweenkcukacha zephaneli yelanga:
A) Ubungakanani bombane
Kwiqondo lokushisa eliphantsi kakhulu (indawo exhomekeke kuyo, apha -3 ℃ ), i-voltage ye-open-circuit V oc yeemodyuli kumtya ngamnye akufanele idlule ubuninzi begalelo lombane we-inverter (1000 V):
1) Ukubalwa kweVoltage yeSekethe eVulekileyo ku -3℃:
I-VOC (-3℃)= 45.5*(1+(-3-25)*(-0.33%)) = 49.7 Volt
2) Ukubalwa kwe-N elona nani likhulu leemodyuli kumtya ngamnye:
N = Ubuninzi bombane wokufaka igalelo (1000 V)/49.7 Volt = 20.12 (rhoqo uphantsi)
Inani leepaneli ze-PV zelanga kumtya ngamnye kufuneka zingadluli iimodyuli ezingama-20 Ngaphandle koko, kwelona qondo liphezulu lobushushu (indawo exhomekeke, apha 35℃), i-MPP voltage VMPP yomtya ngamnye kufuneka ibe ngaphakathi kuluhlu lwe-MPP lwe-inverter yamandla elanga (160V– 950V):
3) Ukubalwa kowona mthamo uphezulu weVoltage Power VMPP kwi-35℃:
VMPP (35℃)=45.5*(1+(35-25)*(-0.33%))= 44 Volt
4) Ukubalwa kwenani elincinci leemodyuli M kumtya ngamnye:
M = Min MPP amandla ombane (160 V)/ 44 Volt = 3.64(isoloko ijikeleza)
Inani leepaneli zePV zelanga kumtya ngamnye kufuneka zibe ubuncinane iimodyuli ezi-4.
B) Ubungakanani bangoku
I-short circuit current ye-I SC ye-PV array mayingadluli ubuninzi obuvunyelweyo beInput current ye-solar power inverter:
1) Ukubalwa kobona bukhulu bangoku kuma-35℃:
ISC (35℃)= ((1+ (10 * (TCSC /100))) * ISC ) = 9.22*(1+(35-25)*(-0.06%))= 9.16 A
2) Ukubalwa kwe-P inani eliphezulu leentambo:
P = Elona galelo liphezulu langoku (12.5A)/9.16 A = 1.36 imitya (ehlala ezantsi)
Uluhlu lwePV kufuneka lungagqithi kumtya omnye.
NONE
Eli nyathelo alifuneki kwi-MPPT yokuguqula umtya omnye kuphela.
C) Isiphelo:
1. I-PV generator (PV array) ibandakanyaumtya omnye, edityaniswe nenqanaba lesithathu le-5KW inverter.
2. Kwintambo nganye iipaneli zelanga ezidibeneyo kufuneka zibengaphakathi 4-20 iimodyuli.
NONE
Ekubeni i-voltage ye-MPPT engcono kakhulu ye-inverter yesigaba sesithathu ijikeleze i-630V (i-voltage engcono ye-MPPT ye-inverter yesigaba esisodwa ijikeleze i-360V), ukusebenza kakuhle kwe-inverter kuphezulu kakhulu ngeli xesha. Ke kuyacetyiswa ukubala inani leemodyuli zelanga ngokowona mbane ubalaseleyo weMPPT:
N = Eyona MPPT VOC / VOC (-3°C) = 756V/49.7V=15.21
Iphaneli yekristale enye Eyona MPPT VOC =Owona mandla ombane eMPPT x 1.2=630×1.2=756V
Iphaneli yePolycrystal Eyona iMPPT VOC =Owona mandla ombane weMPPT x 1.2=630×1.3=819V
Ngoko kwi-Renac i-inverter yesigaba sesithathu i-R3-5K-DT igalelo leepaneli zelanga ezicetyiswayo ziimodyuli ze-16, kwaye zifuna nje ukuqhagamshelwa umtya omnye 16x330W = 5280W.
4. Isiphelo
I-inverter input Inombolo yeepaneli zelanga kuxhomekeke kwiqondo lokushisa kweseli kunye ne-coefficient yokushisa. Owona msebenzi ubalaseleyo usekwe kowona mbane ubalaseleyo weMPPT we-inverter.