Manual Metrel MI 3109 - Eurotest PV Lite (page 67 of 68) (Dutch)

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MI 3109 EurotestPV Lite Anhang E – PV-Messungen – Berechnungswerte

PASS ("Erfüllt") je nach Temperatur:

 Bei Tamb < 25 °C oder Tcell < 40 °C => η2>0,85

 Bei Tamb > 25 °C oder Tcell > 40 °C => η2>(1-Ptpv-0,08),

mit Ptpv anhand der gemessenen Temperatur berechnet wird als

25 ( 20) 0,08

tpv amb

Irr

P T NOCT





    





oder

( 25)

tpv cell



  

wo NOCT als Nennwert der Betriebstemperatur der Zelle (Daten vom

Modulhersteller) und γ der Koeffizient der Leistungseigenschaft des PV-Moduls

(Eingabewert zwischen 0,01 bis 0,99) (Daten vom Modulhersteller).

NOCT

Nennwert der Betriebstemperatur der Zelle (Daten vom Modulhersteller)

Temperaturkoeffizient aus Leistungseigenschaften des PV-Moduls

(Eingabewert zwischen 0,01 bis 0,99)

2. Wechselrichter:





Berechnung der Konversionseffizienz im Vergleich zu STC und gemessenen

Korrekturwerte

(U, I (AC, DC), Phase, Irrstc, Tstc, Pnom, Irr, Tcell, Rs, α, β, Isc, M, N)

Modul:

Die gemessenen Werte für U und I werden gemäß STC-Bedingungen korrigiert:

1 1 1

( 1) ( )

( ) ( )

STC

STC SC STC

STC S STC STC

Irr

I I I N T T

Irr

U U R I I M T T





       

        

mit I1 und U1 als gemessene Gleichstromwerte und Modulspannung, Isc als

gemessenen Kurzschlussstroms des Moduls, Irrstc als Bestrahlungsstärkewert bei STC,

Irr als gemessene Bestrahlungsstärke, α und β als Strom- und Spannungs-

Temperaturkoeffizienten des Moduls, Tstc als Temperatur bei STC, T1 als gemessene

Temperatur, Rs als Serienwiderstand des Moduls, M als Anzahl der in Serie

geschalteten Einzelmodule und N als Anzahl der parallel geschalteten Module.

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Metrel MI 3109 - Eurotest PV Lite Manual

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