Sas Mode - Chroma 62000H Series Operating & Programming Manual

3.3.9.3

SAS MODE

Chroma 62000H Series DC Power Supply with Solar Array Simulation not only able to
simulate the Solar Cell curve via the Solar Array Simulation Soft Panel but also has built in
model to provide solar cell curve simulation function that is called SAS Mode. Please see
Britton, Lunscher, and Tanju, "A 9 KW High-Performance Solar Array Simulator",
Proceedings of the European Space Power Conference, August 1993 (ESA WPP-054,
August 1993) for the built-in model. The model formula discussed in the thesis is described
as below.

 

I
   

V ln 2

oc
 
I

sc
 
ln 2

V
R

1
where

V V

oc mp
， N
R
s
I
mp
Voc: Open Circuit Voltage
Isc: Short Circuit Current
Vmp: Max. Power Voltage
Imp: Max. Power Current
Moreover, due to the fact the model formula will use the inputted Vmp and Imp to get the
maximum power point, the calculated Vmp and Imp will be different. The smaller Fill Factor
(FF) the bigger difference they will be. Therefore, as well as the settings of the 4 parameters

N



 
 
R I I
s sc
I
s sc
V
oc
 

a
ln 2 2


，
a
 
I
   
mp
ln
 
I
sc
Figure 3-160
 

R I
   
 
s sc
V 1 R
mp s
 
V
oc
V
oc
Manual Operation


I I
mp sc
3-89