Ƙididdigar Ƙirar Ƙirar Rana Mai Inverter
Labari mai zuwa zai taimake ka ƙididdige matsakaicin / ƙaramar adadin kayayyaki a kowane jeri yayin zayyana tsarin PV naka.Kuma girman inverter ya ƙunshi sassa biyu, ƙarfin lantarki, da girman halin yanzu.A lokacin girman inverter kana buƙatar yin la'akari da iyakokin daidaitawa daban-daban, waɗanda yakamata a yi la'akari da su lokacin yin girman inverter na hasken rana (Bayanai daga takaddun bayanan inverter da na rana).Kuma a lokacin girman girman, ƙimar zafin jiki shine muhimmin abu.
1. Solar panel zazzabi coefficient na Voc / Isc:
Wutar lantarki/a halin yanzu da na'urorin hasken rana ke aiki a kai sun dogara ne akan zafin jiki na tantanin halitta, mafi girman zafin jiki yana rage ƙananan ƙarfin lantarki / halin yanzu da hasken rana zai samar kuma ya bambanta.Wutar lantarki / halin yanzu na tsarin koyaushe zai kasance a mafi girma a cikin yanayi mafi sanyi kuma alal misali, ana buƙatar madaidaicin zafin rana na Voc don aiwatar da wannan.Tare da mono da poly crystalline solar panels koyaushe yana da mummunan %/oC adadi, kamar -0.33%/oC akan SUN 72P-35F.Ana iya samun wannan bayanin akan takardar bayanan masana'antun hasken rana.Da fatan za a koma ga adadi na 2.
2. No. na hasken rana a jerin kirtani:
A lokacin da aka yi wa na'urorin hasken rana a cikin jerin igiyoyi (wato tabbataccen panel ɗaya yana da alaƙa da mummunan panel na gaba), ana ƙara ƙarfin wutar lantarki na kowane panel tare don ba da jimlar wutar lantarki ta kirtani.Don haka muna buƙatar sanin nau'ikan panels na hasken rana da kuke son yin waya a jere.
Lokacin da kuke da duk bayanan kuna shirye don shigar da su cikin ma'aunin wutar lantarki mai zuwa na hasken rana da lissafin girman na yanzu don ganin ko ƙirar hasken rana zai dace da bukatunku.
Girman Wutar Lantarki:
1. Max panel's voltage =Voc*(1+(Min.temp-25)*madaidaicin zafin jiki(Voc)
2. Matsakaicin adadin hasken rana=Max.Input irin ƙarfin lantarki / Max panel ta ƙarfin lantarki
Girman Girman Yanzu:
1. Min panel's current = Isc*(1+(Max.temp-25)*matsayin zafin jiki(Isc)
2. Matsakaicin adadin kirtani=Max.shigar da halin yanzu / Min panel na yanzu
3. Misali:
Curitiba, birnin Brazil, abokin ciniki yana shirye don shigar da Renac Power 5KW guda uku inverter, yin amfani da tsarin hasken rana shine 330W module, mafi ƙarancin zafin jiki na birni shine -3 ℃ kuma matsakaicin zafin jiki shine 35 ℃, buɗewa. kewaye irin ƙarfin lantarki ne 45.5V, Vmpp ne 37.8V, da inverter MPPT irin ƙarfin lantarki kewayon ne 160V-950V, kuma matsakaicin irin ƙarfin lantarki iya jure 1000V.
Inverter da takardar bayanai:
Takardar bayanan panel na hasken rana:
A) Girman Wutar Lantarki
A mafi ƙasƙanci zafin jiki (location dogara, a nan -3 ℃), da bude-circuit ƙarfin lantarki V oc na kayayyaki a cikin kowane kirtani dole ne ba wuce matsakaicin shigar ƙarfin lantarki na inverter (1000 V):
1) Lissafi na Buɗaɗɗen Wutar Lantarki a -3 ℃:
VOC (-3℃) = 45.5*(1+(-3-25)*(-0.33%)) = 49.7Vt
2) Lissafi na N matsakaicin adadin kayayyaki a cikin kowane kirtani:
N = Matsakaicin ƙarfin shigarwa (1000V) / 49.7 Volt = 20.12 (ko da yaushe yana zagaye ƙasa)
Yawan hasken rana PV bangarori a cikin kowane kirtani dole ne ya wuce 20 kayayyaki Bayan haka, a mafi yawan zafin jiki (wuri dogara, a nan 35 ℃), da MPP ƙarfin lantarki VMPP kowane kirtani dole ne a cikin MPP kewayon na hasken rana ikon inverter (160V- 950V):
3) Lissafi na matsakaicin ƙarfin wutar lantarki VMPP a 35 ℃:
VMPP (35℃)=45.5*(1+(35-25)*(-0.33%))= 44Vt
4) Ƙididdigar mafi ƙarancin adadin modules M a cikin kowane kirtani:
M = Min MPP ƙarfin lantarki (160V) / 44 Volt = 3.64 (koyaushe yana zagaye)
Adadin filayen PV na hasken rana a cikin kowane kirtani dole ne ya zama aƙalla nau'ikan 4.
B) Girman Girman Yanzu
Matsakaicin kewayawa na yanzu I SC na tsararrun PV dole ne ya wuce iyakar abin da aka yarda da shi na halin yanzu na inverter na hasken rana:
1) Lissafi na matsakaicin halin yanzu a 35 ℃:
ISC (35 ℃) = ((1+ (10 * (TCSC / 100)))) * ISC = 9.22*(1+(35-25)*(-0.06%))= 9.16 A
2) Lissafi na P iyakar adadin kirtani:
P = Matsakaicin shigarwa na yanzu (12.5A)/9.16 A = 1.36 kirtani (ko da yaushe a zagaye ƙasa)
Dole ne jeri na PV ya wuce kirtani ɗaya.
Bayani:
Ba a buƙatar wannan matakin don inverter MPPT tare da kirtani ɗaya kawai.
C) Kammalawa:
1. PV janareta (PV array) ya ƙunshikirtani daya, wanda aka haɗa zuwa uku lokaci 5KW inverter.
2. A cikin kowane kirtani da haɗin hasken rana ya kamata ya kasancea cikin 4-20 modules.
Bayani:
Tunda mafi kyawun wutar lantarki na MPPT na inverter uku yana kusa da 630V (mafi kyawun ƙarfin lantarki na MPPT na inverter lokaci ɗaya yana kusa da 360V), ingantaccen aiki na inverter shine mafi girma a wannan lokacin.Don haka ana ba da shawarar yin lissafin adadin ƙirar hasken rana bisa ga mafi kyawun ƙarfin MPPT:
N = Mafi kyawun MPPT VOC / VOC (-3°C) = 756V/49.7V=15.21
Single crystal panel Mafi kyawun MPPT VOC = Mafi kyawun ƙarfin lantarki na MPPT x 1.2 = 630 × 1.2 = 756V
Polycrystal panel Mafi kyawun MPPT VOC = Mafi kyawun ƙarfin lantarki na MPPT x 1.2 = 630 × 1.3 = 819V
Don haka don Renac mai jujjuyawar lokaci uku R3-5K-DT abubuwan da aka ba da shawarar shigar da hasken rana sune kayayyaki 16, kuma kawai ana buƙatar haɗa kirtani ɗaya 16x330W=5280W.
4. Kammalawa
Shigar da inverter A'a na fale-falen hasken rana ya dogara da yawan zafin jiki da yawan zafin jiki.Mafi kyawun aikin yana dogara ne akan mafi kyawun ƙarfin lantarki na MPPT na inverter.