HT instruments SOLAR I-V - Manual (Page 20)

I-V400 - SOLAR I-V
EN - 18
5.2.3. Selection of the compensation relationship of temperature effects
This option allows selecting the relationship to be used to correct the measurements
performed according to the modules’ temperature. The following correction modes are
available:
-
T.mod.: Correction factor Rfv2 related to PV module Temp. (Italian guideline CEI-82-25)
-
T.env: Correction factor Rfv2 related to environment Temp. (Italian guideline CEI-82-25)
-
ndc: PRp (Performance ratio for active power) corrected by PV module Temp.
CAUTION
If it’s performed a test according to Italian guideline it is recommended to select
“T.env.” correction
Corr.
Type
Temperature (Tcel) PRp calculation Ref.
T.mod. as Tmodule_Me Tcel





  
 

C) 40 Tcel (if
100
40) - (Tcel - 1
C) 40 Tcel (if 1
fv2

R
-








 

n
STC
p
ca
P
G
G
Rfv
P
PRp
2
CEI
82-25
T.amb.
 






   
800
Irr
20 Tamb Tcel NOCT
dc

as Tmodule_Me Tcel

 
n
ca
cel
p
STC
P
P
T
G
G
PRp









    
25
100
1

- - -
where:
Symbol Description Meas. unit
p
G
Irradiance on PV module surface
 
2 W/m
STC
G
Standard Irradiance = 1000
 
2 W/m
n
P
Nominal Power = sum of all power module (Pmax ) included in the part of PV plant under test
 
kW
ca
P
AC Active Power measured
 
kW
2 Rfv
Thermal Coefficient factor

Absolute value of Pmax thermal coefficient
 
C %/

NOCT Normal Operating Cell Temperature (@ 800W/m 2 , 20°C, AM=1.5, vel. Aria =1m/s).
 
C %/

For further details see § 11.1