Hnub ci inverter txoj hlua hlua tsim kev suav
Cov kab lus hauv qab no yuav pab koj suav qhov siab tshaj plaws / tsawg kawg ntawm cov lej ntawm cov hlua hauv txoj hlua thaum tsim qauv koj PV system. Thiab cov inverter sizing muaj ob ntu, voltage, thiab sizing tam sim no. Thaum lub inverter sizing koj yuav tsum tau coj mus rau hauv tus account qhov sib txawv teeb tsa, uas yuav tsum tau txiav txim siab thaum sizing lub hnub ci zog inverter (cov ntaub ntawv los ntawm cov ntawv xov xwm hauv Inverter thiab Hnub ci vaj huam sib luag cov ntawv txheeb). Thiab thaum lub sijhawm sizing, ntsuas kub yog qhov tseem ceeb tshaj plaws.
1. Hnub ci vaj huam sib luag kub coefficient ntawm VOC / ISC:
Qhov hluav taws xob / tam sim no uas hnub ci ntsa iab ua haujlwm ntawm yog nyob ntawm lub xov tooj kub, qhov siab dua qhov ntsuas kub / tam sim no lub solar vaj huam sib luag yuav tsim thiab vise. Qhov voltage / tam sim no ntawm lub kaw lus yuav ib txwm nyob ntawm nws yog qhov siab tshaj plaws hauv cov kev mob khaub thuas thiab piv txwv li lub vaj huam sib luag, lub hnub ci huab tais coefficient ntawm voc yuav tsum tau ua qhov no. Nrog mono thiab poly crystalline hnub ci panels nws yog ib txwm tsis zoo% / Oc daim duab, xws li -0.33% / Oc ntawm lub hnub 72p-35F. Cov ntaub ntawv no tuaj yeem pom nyob rau ntawm Lub Vaj Huam Sib Luag Solar tuam tsev tuam ntxhab. Thov saib mus rau Daim Duab 2.
2. Tsis muaj. Ntawm Hnub Ci Panels hauv Series Txoj Hlua:
Thaum hnub ci ntsa iab yog wired nyob rau hauv series hlua (uas yog qhov zoo ntawm ib lub vaj huam sib luag tau txuas nrog qhov tsis zoo ntawm txhua lub vaj tsev txuas ntxiv ua ke los muab tag nrho cov hlua voltage. Yog li ntawd peb yuav tsum paub ntau npaum li cas hnub ci ntsa iab koj npaj rau xaim rau hauv series.
Thaum koj muaj tag nrho cov ntaub ntawv koj tau npaj nkag mus rau hauv lub vaj huam sib luag hauv qab no kom pom yog tias lub ntiaj teb vaj huam sib luag tsim yuav haum koj cov kev xav tau.
Voltage sizing:
1. Max vaj huam sib luag cov voltage = voc * (1+ (min.tem-25) * Kub coefficient (voc)
2. Max tus naj npawb ntawm lub hnub ci panels = max. Cov lus qhia voltage / max vaj huam sib luag lub voltage
Tam sim no sizing:
1. MIN vaj huam sib luag tam sim no = ISC * (1+ (Max.Temp-25) * Kub coefficient (ISC)
2. Max tus naj npawb ntawm cov hlua = Max. Cov tswv yim tam sim no / min vaj huam sib luag tam sim no
3. Piv txwv:
Curitiba, lub nroog ntawm Brazil, npaj tau los nruab ib lub zog renac yog 37.8v, lub inverter mpt voltage yog 160V-950v, thiab ntau tshaj voltage tuaj yeem tiv thaiv 1000000.
Inverter thiab Datasheet:
Hnub ci vaj huam sib luag Datasheet:
A) voltage sizing
Ntawm qhov qis qis tshaj plaws (thaj chaw nyob ntawm, ntawm no -3 ℃), qhib cov qauv voltage v o hauv txhua txoj hlua yuav tsum tsis tshaj qhov inverter (1000 v):
1) Kev Xam Xam ntawm qhib Circuit Coadage ntawm -3 ℃:
VOC (-3 ℃) = 45.5 * (1 + (- 3-25) * (- 0.33%)) = 49.7 Volt
2) Xam ntawm n cov lej ntau ntawm cov qauv hauv txhua txoj hlua:
N = max cov tswv yim voltage (1000 v) /49.7 Volt = 20.12 (ib txwm puag ncig)
Cov naj npawb ntawm Hnub Ci Panels hauv txhua txoj hlua yuav tsum tsis pub tshaj 20 tus qauv yuav tsum yog nyob rau hauv txhua txoj hlua ntawm txhua txoj hlua ntawm lub hnub ci zog inverter (160V-950v-950v):
3) Kev Xam ntawm Kev Ntsuas Hluav Taws Xob Ntau Tshaj Voltage VMPP ntawm 35 ℃:
VMPP (35 ℃) = 45.5 * (1+ (35-25-25) * (- 0.33%)) = 44 volt
4) Xam txog qhov tsawg kawg ntawm cov qauv m hauv txhua txoj hlua:
M = min mpp voltage (160 v) / 44 volt = 3.64 (ib txwm puag ncig)
Tus naj npawb ntawm cov hnub ci PV vaj nyob hauv txhua txoj hlua yuav tsum yog tsawg kawg 4 modules.
B) Tam sim no sizing
Lub sijhawm luv luv hluav taws xob Kuv sc ntawm PV array yuav tsum tsis pub tshaj qhov uas tau tso cai tshaj tawm cov tswv yim tshaj plaws tam sim no ntawm hnub ci zog inverter:
1) xam ntawm qhov nyiaj siab kawg ntawm 35 ℃:
ISC (35 ℃) = ((1+ (10 * (TCSC / 100)) * ISC) = 9.22 * (15) * (- 0.06%) = 9.16 a
2) Kev Xam Pauv ntawm P Cov hlua ntau tshaj plaws:
P = cov tswv yim siab tshaj plaws tam sim no (12.5A) /9.16 A = 1.36 cov hlua (ib txwm puag ncig)
PV array yuav tsum tsis tshaj ib txoj hlua.
Cim:
Cov kauj ruam no tsis tas yuav tsum muaj rau inverter MPT nrog tsuas yog ib txoj hlua.
C) Xaus:
1. Lub dav hlau PV (PV array) muajIb txoj hlua, uas txuas nrog rau peb theem 5kW inverter.
2. Hauv txhua txoj hlua ntawm cov panels sib txuas yuav tsum yogTsis pub dhau 4-20 modules.
Cim:
Txij li qhov zoo tshaj plaws MPPT voltage ntawm peb theem inverter yog nyob ib ncig ntawm 2430v (zoo tshaj plaws MPT voltage ntawm cov inverter yog qhov siab tshaj lub sijhawm no. Yog li nws tau pom zoo kom laij cov pes tsawg hnub ci raws li qhov zoo tshaj plaws MPP voltage:
N = zoo tshaj MPP cov ntaub ntawv voc / voc (-3 ° C) = 756V / 49.7v = 15.21
Ib Lub Vaj Huam Sib Luag Ib qho zoo tshaj plaws Mppt VOC = Qhov zoo tshaj plaws MPP Voltage X 1.2 = 630 × 1.2 = 756V
Vaj huam sib luag polycrystal zoo tshaj plaws MPPT VOC = zoo tshaj plaws MPP Voltage X 1.2 = 630 × 1.3 = 819V
Yog li rau renac peb theem inverter r3-5k-dt cov lus qhia pom zoo hnub ci yog 16 modules, thiab tsuas yog xav tau txuas ib txoj hlua 16xW = 5280W.
4. Xaus
Inverter tawm tswv yim Tsis muaj ntawm cov khoom siv hluav taws xob hnub ci nws nyob ntawm cov xovtooj ntawm tes thiab qhov kub thiab txias. Qhov kev ua tau zoo tshaj plaws yog raws qhov zoo tshaj plaws MPP Voltage ntawm cov inverter.