Lipalo tsa Moralo oa Khoele ea Solar Inverter
Sengoliloeng se latelang se tla u thusa ho bala palo e kholo / bonyane ea li-module ka khoele ea letoto ha u rala sistimi ea hau ea PV. 'Me boholo ba inverter bo na le likarolo tse peli, voltage, le boholo ba hajoale. Nakong ea inverter sizing o hloka ho ela hloko meeli e fapaneng ea tlhophiso, e lokelang ho nahanoa ha u lekanya motlakase oa letsatsi (Data ho tloha ho inverter le lipampiri tsa data tsa solar panel). 'Me nakong ea boholo, coefficient ea mocheso ke ntlha ea bohlokoa.
1. Solar panel mocheso coefficient ea Voc / Isc:
Matla a motlakase / hona joale ao liphanele tsa letsatsi li sebetsang ho ona a ipapisitse le mocheso oa sele, ha mocheso o phahame o theola matla a motlakase / hona joale karolo ea letsatsi e tla hlahisa le ho fapana. Matla a motlakase/a hona joale a sistimi a tla lula a le holimo haholo maemong a batang haholo mme mohlala, mocheso oa mocheso oa solar oa Voc oa hlokahala ho etsa sena. Ka liphanele tsa letsatsi tsa mono le poly crystalline e lula e le palo e mpe ea %/oC, joalo ka -0.33%/oC ho SUN 72P-35F. Tlhahisoleseding ena e ka fumanoa leqepheng la data la baetsi ba lisebelisoa tsa letsatsi. Ka kopo sheba setšoantšo sa 2.
2. No. ea liphanele tsa letsatsi ka letoto la likhoele:
Ha liphanele tsa letsatsi li kentsoe ka likhoele tsa letoto (ke hore positive, phanele e le 'ngoe e hokahane le negative ea phanele e latelang), voltage ea phanele ka 'ngoe e eketsoa hammoho ho fana ka matla a khoele kaofela. Ka hona, re hloka ho tseba hore na u rerile ho kenya lisebelisoa tse kae tsa letsatsi ka terata.
Ha u na le tlhaiso-leseling eohle, u se u loketse ho e kenya ka har'a li-voltage tse latelang tsa solar panel le lipalo tsa boholo ba hajoale ho bona hore na moralo oa solar panel o tla lumellana le litlhoko tsa hau.
Tekanyo ea Voltage:
1. Matla a phahameng a phanele =Voc*(1+(Min.temp-25)*coefficient ea mocheso(Voc)
2. Palo e phahameng haholo ea liphanele tsa Solar=Boholo. motlakase oa ho kenya / Max Panel Voltage
Boholo ba Hona Joale:
1. Min pane ea hajoale =Isc*(1+(Max.temp-25)*coefficient ea mocheso(Isc)
2. Palo e phahameng ea likhoele=Boholo. input current / Min panel ea hajoale
3. Mohlala:
Curitiba, toropo ea Brazil, moreki o se a ikemiselitse ho kenya inverter e le 'ngoe ea Renac Power 5KW ea mekhahlelo e meraro, mochini o sebelisang solar panel ke module ea 330W, mocheso o tlase oa toropo ke -3 ℃ mme mocheso o phahameng ke 35 ℃, o bulehileng. motlakase oa potoloho ke 45.5V, Vmpp ke 37.8V, inverter MPPT voltage range ke 160V-950V, 'me matla a mangata a ka mamella 1000V.
Inverter le database:
Lethathamo la lintlha tsa solar panel:
A) Tekanyo ea Voltage
Mocheso o tlaase ka ho fetisisa (ho itšetlehile ka sebaka, mona -3 ℃ ), motlakase o bulehileng oa V oc oa li-module tsa khoele e 'ngoe le e' ngoe ha oa lokela ho feta boholo ba motlakase oa motlakase oa motlakase (1000 V):
1) Palo ea Open Circuit Voltage ho -3℃:
VOC (-3℃)= 45.5*(1+(-3-25)*(-0.33%)) = 49.7 Volt
2) Palo ea N palo e kholo ea li-module khoeleng e 'ngoe le e 'ngoe:
N = Matla a ho kenya letsoho a phahameng (1000 V)/49.7 Volt = 20.12 (kamehla o pota-pota)
Palo ea liphanele tsa solar PV khoeleng e 'ngoe le e' ngoe ha ea lokela ho feta li-module tsa 20 Ntle le moo, mocheso o phahameng ka ho fetisisa (o itšetlehile ka sebaka, mona 35 ℃), MPP voltage VMPP ea khoele ka 'ngoe e tlameha ho ba ka har'a mefuta ea MPP ea motlakase oa letsatsi (160V- 950V):
3) Palo ea boholo ba Voltage ea Matla a VMPP ho 35℃:
VMPP (35℃)=45.5*(1+(35-25)*(-0.33%))= 44 Volt
4) Palo ea palo e fokolang ea li-module tsa M khoeleng ka 'ngoe:
M = Matla a Min MPP (160 V)/ 44 Volt = 3.64 (kamehla e potoloha)
Palo ea liphanele tsa letsatsi tsa PV khoeleng ka 'ngoe e tlameha ho ba bonyane li-module tse 4.
B) Boholo ba Hona Joale
Potoloho e khuts'oane ea hajoale I SC ea sehlopha sa PV ha ea tlameha ho feta tekanyo e lumelletsoeng ea Input current ea motlakase oa letsatsi:
1) Palo ea boholo ba Hona joale ho 35 ℃:
ISC (35℃)= ((1+ (10 * (TCSC /100))) * ISC ) = 9.22*(1+(35-25)*(-0.06%))= 9.16 A
2) Palo ea P palo e kholo ea likhoele:
P = Boholo ba hona joale ba ho kenya (12.5A)/9.16 A = 1.36 likhoele (kamehla e pota-pota)
PV array ha ea lokela ho feta khoele e le 'ngoe.
Maikutlo:
Mohato ona ha o hlokehe bakeng sa inverter MPPT e nang le khoele e le 'ngoe feela.
C) Qetello:
1. Jenereithara ea PV (PV array) e na lekhoele e le 'ngoe, e hokahaneng le inverter ea mekhahlelo e meraro ea 5KW.
2. Khoeleng e 'ngoe le e' ngoe lisebelisoa tsa letsatsi tse kopantsoeng li lokela ho baka hare ho 4-20 modules.
Maikutlo:
Kaha motlakase o motle ka ho fetisisa oa MPPT oa motlakase oa mekhahlelo e meraro o pota-potile 630V (motlakase o motle ka ho fetisisa oa MPPT oa karolo e le 'ngoe ea motlakase o pota-potileng 360V), katleho ea ho sebetsa ea inverter ke eona e phahameng ka ho fetisisa nakong ena. Kahoo ho khothaletsoa ho bala palo ea li-module tsa letsatsi ho latela motlakase o motle ka ho fetisisa oa MPPT:
N = Molemo ka ho fetisisa MPPT VOC / VOC (-3°C) = 756V/49.7V=15.21
Karolo e le 'ngoe ea kristale e Molemo ka ho Fetisisa MPPT VOC = Matla a MPPT a Matla ka ho Fetisisa x 1.2=630×1.2=756V
Polycrystal panel Molemo ka ho fetisisa MPPT VOC =Motlakase oa motlakase oa MPPT x 1.2=630×1.3=819V
Kahoo bakeng sa Renac phase three phase inverter R3-5K-DT liphanele tse khothaletsoang tsa solar ke li-module tse 16, 'me li hloka feela ho hokela khoele e le 'ngoe 16x330W=5280W.
4. Qetello
Inverter input No ea lisebelisoa tsa letsatsi e itšetlehile ka mocheso oa sele le mocheso oa mocheso. Ts'ebetso e ntle ka ho fetisisa e ipapisitse le matla a phahameng ka ho fetisisa a MPPT a inverter.