Hoʻolālā Hoʻolālā Hoʻolālā Hoʻohālikelike Lā Inverter
E kōkua ka ʻatikala aʻe iā ʻoe e helu i ka helu kiʻekiʻe / liʻiliʻi loa o nā modules i kēlā me kēia string series i ka wā e hoʻolālā ai i kāu ʻōnaehana PV. A ʻo ka nui o ka inverter he ʻelua ʻāpana, ka volta, a me ka nui o kēia manawa. I ka wā o ka inverter sizing pono ʻoe e noʻonoʻo i nā palena hoʻonohonoho like ʻole, pono e noʻonoʻo ʻia i ka wā e hoʻonui ai i ka inverter mana solar (Data mai ka inverter a me nā pepa ʻikepili solar panel). A i ka wā o ka hoʻonui ʻana, he mea koʻikoʻi ka coefficient mahana.
1. Koefficient wela wela o ka la o Voc / Isc:
ʻO ka volta / ʻā i hana ʻia e nā panela lā e pili ana i ka wela o ke kelepona, ʻoi aku ka kiʻekiʻe o ka mahana o ka haʻahaʻa haʻahaʻa o ka volta / o kēia manawa a ka panela solar e hana ai a ʻo ka versa. E mau ana ka volta a me ke au o ka ʻōnaehana i ka mea kiʻekiʻe loa i nā kūlana anuanu a no ka laʻana, pono ka coefficient wela o ka lā o Voc e hana i kēia. Me ka mono a me ka poly crystalline solar panels he mau helu %/oC maikaʻi ʻole, e like me -0.33%/oC ma ka SUN 72P-35F. Hiki ke ʻike ʻia kēia ʻike ma ka pepa ʻikepili o nā mea hana panel solar. E ʻoluʻolu e nānā i ka helu 2.
2. Ka helu o nā paneli lā ma ke kaula moʻo:
Ke hoʻopili ʻia nā panela lā i nā kaula moʻo (ʻo ia ka mea maikaʻi o kekahi panel i hoʻopili ʻia i ka ʻino o ka panel aʻe), ua hoʻohui pū ʻia ka volta o kēlā me kēia panel e hāʻawi i ka huina o ke kaula. No laila pono mākou e ʻike i ka nui o nā panela solar āu e manaʻo ai e uea i ka series.
Ke loaʻa iā ʻoe nā ʻike a pau, mākaukau ʻoe e hoʻokomo iā ia i loko o ka nui o ka volta panel solar a me ka helu ʻana o kēia manawa e ʻike inā kūpono ka hoʻolālā panel solar i kāu mau koi.
Ka nui o ka Voltage:
1. Ka nui o ka volta o ka panela =Voc*(1+(Min.temp-25)*koefisien wela(Voc)
2. Ka helu kiʻekiʻe o nā panela lā=Max. kaha hoʻokomo / Max panel's voltage
Ka nui o kēia manawa:
1. ʻO kēia manawa o ka panel min =Isc*(1+(Max.temp-25)*koefisi wela(Isc)
2. Ka nui o na kaula = Max. komo i kēia manawa / Min panel o kēia manawa
3. Laʻana:
ʻO Curitiba, ke kūlanakauhale ʻo Brazil, ua mākaukau ka mea kūʻai aku e hoʻokomo i hoʻokahi Renac Power 5KW ʻekolu ʻāpana inverter, ʻo ka hoʻohana ʻana i ka hiʻohiʻona solar panel he 330W module, ʻo ka haʻahaʻa haʻahaʻa haʻahaʻa o ke kūlanakauhale ʻo -3 ℃ a ʻo ka wela kiʻekiʻe he 35 ℃, ka wehe. ʻO 45.5V ka uila kaapuni, ʻo Vmpp ka 37.8V, ʻo ka pā uila MPPT inverter he 160V-950V, a hiki ke kūpaʻa ka uila kiʻekiʻe. 1000V.
Inverter a me ka ʻikepili:
ʻIkepili lā:
A) Hoʻonui Voltage
Ma ka wela haʻahaʻa loa (e pili ana i ka wahi, ma aneʻi -3 ℃), ʻaʻole pono ka volta kaapuni wehe V o nā modules i kēlā me kēia kaula ma mua o ka nui o ka volter input o ka inverter (1000 V):
1) Heluhelu o ka Voltage Kaapuni Open ma -3 ℃:
VOC (-3 ℃)= 45.5*(1+(-3-25)*(-0.33%)) = 49.7 Volt
2) Ka helu ʻana o N ka helu kiʻekiʻe o nā modula i kēlā me kēia kaula:
N = Puke uila komo nui (1000 V)/49.7 Volt = 20.12 (poe mau i lalo)
ʻAʻole pono e ʻoi aku ka nui o nā panela PV solar i kēlā me kēia kaula ma mua o 20 mau modula Ma waho aʻe o ka wela kiʻekiʻe (e pili ana i ka wahi, ma ʻaneʻi 35 ℃), pono ka MPP voltage VMPP o kēlā me kēia kaula i loko o ka laulā MPP o ka mea hoʻohuli mana lā (160V– 950V):
3) Ka helu ʻana o ka mana nui loa VMPP ma 35 ℃:
VMPP (35 ℃)=45.5*(1+(35-25)*(-0.33%))= 44 Volt
4) Ka helu ʻana i ka helu liʻiliʻi o nā modula M i kēlā me kēia kaula:
M = Min MPP Volta (160 V)/ 44 Volt = 3.64 (poe mau i luna)
ʻO ka helu o nā paneli PV lā ma kēlā me kēia kaula he 4 mau modula aʻe.
B) Ka nui o kēia manawa
ʻAʻole pono ke kaapuni pōkole ʻo I SC o ka pūʻulu PV ma mua o ka ʻae ʻia o ka mana hoʻokomo kiʻekiʻe loa o ka mea hoʻohuli mana o ka lā:
1) Ka helu ʻana o ka ʻoi loa o kēia manawa ma 35 ℃:
ISC (35 ℃)= ((1+ (10 * (TCSC /100))) * ISC ) = 9.22*(1+(35-25)*(-0.06%))= 9.16 A
2) Ka helu ʻana o P ka helu kiʻekiʻe o nā kaula:
P = ʻO kēia manawa hoʻokomo kiʻekiʻe loa (12.5A)/9.16 A = 1.36 mau kaula (poe mau i lalo)
ʻAʻole pono ka papa PV ma mua o hoʻokahi kaula.
ʻŌlelo:
ʻAʻole koi ʻia kēia ʻanuʻu no ka MPPT inverter me hoʻokahi kaula wale nō.
C) Ka hopena:
1. Aia ka PV generator (PV array).hookahi kaula, i hoʻopili ʻia i ka inverter ʻekolu ʻāpana 5KW.
2. I loko o kēlā me kēia kaula i hoʻohui ʻia nā panela lāi loko o 4-20 modules.
ʻŌlelo:
No ka mea, ʻoi aku ka maikaʻi o ka volta MPPT o ka ʻekolu ʻāpana inverter ma kahi o 630V (ʻoi aku ka maikaʻi o ka MPPT voltage o ka mea hoʻohuli hoʻokahi ma kahi o 360V), ʻo ka hana pono o ka inverter ka mea kiʻekiʻe loa i kēia manawa. No laila, manaʻo ʻia e helu i ka helu o nā modules solar e like me ka MPPT maikaʻi loa:
N = MPPT VOC / VOC maikaʻi loa (-3°C) = 756V/49.7V=15.21
ʻO ka pā aniani hoʻokahi MPPT VOC maikaʻi loa = ʻoi loa ka mana MPPT x 1.2=630×1.2=756V
ʻO ka panel polycrystal maikaʻi loa MPPT VOC = ʻOi loa ka mana MPPT x 1.2=630×1.3=819V
No laila no Renac ʻekolu ʻāpana inverter R3-5K-DT ka mea i manaʻo ʻia he 16 modules, a pono e hoʻopili ʻia i hoʻokahi kaula 16x330W=5280W.
4. Ka hopena
Inverter hoʻokomo ʻAʻohe o nā panela lā e hilinaʻi ʻia i ka mahana kelepona a me ka helu wela. Hoʻokumu ʻia ka hana maikaʻi loa ma ka volta MPPT maikaʻi loa o ka inverter.