Name
Description
Unit
T
stc
Temperature at STC
°C
G
stc
Irradiance at STC
W/m²
V
mpp,stc
Maximum Power Point voltage
V
I
mpp,stc
Maximum Power Point current
A
V
oc,stc
Open Circuit voltage
V
I
sc,stc
Short Circuit current
A
T
c (Isc)
Temperature coefficient for the current, sometimes called alpha
%/°C
T
c (Voc)
Temperature coefficient for the voltage, sometimes called beta
%/°C
table 3 - 1
•
To simulate a photovoltaic curve based on the reference parameters described above, some panel parameters are re-
quired. These parameters are specified in Table 3- 2.
Name
Description
Unit
Technology
The type of technology used in the photovoltaic panel, at this moment only
polycrystalline (cSi) and Thin Film are supported.
-
T
pv
The temperature of the photovoltaic panel for the simulation.
°C
G
pv
The irradiance on the photovoltaic panel for the simulation.
W/m²
table 3 - 2
6.2 DYNAMIC EFFICIENCY TEST
•
The simulation module can run a dynamic mppt efficiency test as specified in the EN50530 annex B. To run this test extra
parameters are required. These parameters are specified in table 3- 3.
•
The dynamic efficiency test uses the same configuration parameters as described in chapter , but varies the irradiation
levels of these parameters specified in Table 3- 3.
Name
Description
Unit
G
high
The irradiance at high level
W/m²
G
low
The irradiance at low level
W/m²
Start-up time
The initial time for the test to be at low level, this gives the mpp tracker to start up and
stabilize.
s
Ramp up
Time taken to ramp up to high intensity
s
Dwell high
The time how long the test must stay at high level
s
Ramp down
Time taken to ramp down to low intensity
s
Dwell low
The time how long the test must stay at low level.
s
Repetitions
The number of repetitions the test must take.
-
table 3 - 3
DELTA ELEKTRONIKA BV
SM3300 INTERFACES
Page 3 - 2
March 2014
fig. 3 - 3
PV Curve
