© EPS Stromversorgung in 2022, this information is subject to change without notice
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30000800_manual_psb_10000_4u_30kw_en_04
From the main function generator screen, you can go back to the first screen of FC table configuration and use a formerly
locked
Import/Export
->
Save
action button, to save the calculated table to USB stick. In order to do so, follow the on-screen
instructions. The table can be used to analyze the values or to visualize it in Excel or similar tools.
►
How to work with the FC table function
1.
With an appropriate load connected, for example a DC-DC
converter, start the function by switching the DC output on.
2.
The output voltage will be set depending on the load current,
which is defined by the connected load, and will decrease with
increasing current. Without any load, the voltage will rise to the
adjusted Uoc value.
3.
Stop the function run anytime by the stop button or by switching
off the DC output.
3.11.15
Extended PV function according to EN 50530
3.11.15.1 Introduction
This extended PV table function according to norm EN 50530 is used to simulate solar panels in order to test and rate solar
inverters. It’s also based on the XY generator, same as the simple PV table function from
, but enables more specific
tests and evaluations due to adjustable parameters. Which parameters are available is explained below. The device can,
however, only calculate and run the PV curve. Evaluation of a solar inverter, as described in the norm paper, is only possible
with our software
EPS Power Control
. It will, amongst other result data, determine the inverter’s efficiency.
The impact of the parameters on the PV curve and the simulation is described in the norm paper of EN 50530, which users
can refer to in case more detailed description is required. This section only deals about configuration and control of the PV
simulation.
3.11.15.2
Differences to the basic PV function
The extended PV function has five additional or different characteristics compared to the simple PV function:
•
The simulation distinguishes between a single test run and an automatic test run, called day trend, which is based upon a
user-defined curve built from up to 100,000 points
•
There are two invariable and one variable panel technology available to choose from
•
There are more parameters available to adjust during runtime
•
It allows for data recording during runtime and to save the data either to USB stick or read via digital interface
•
It allows to select between two different parameter sets to adjust during runtime
3.11.15.3 Technologies and technology parameters
When configuring the PV simulation it’s required to select the solar panel technology to simulate. The technologies
cSI
and
Thin film
are invariable in their parameters, while technology
Manual
is variable in all parameters, but within specific limits.
This allows for the variation of the simulation and when copying the fixed parameter values from
cSi
or
Thin film
to
Manual
,
it even enables their variation as well.
One advantage of the invariable technologies is that their technology parameters are automatically set to their defined de
-
faults in the configuration procedure.
Overview of the technology parameters used in the PV curve calculation and their defaults:
Abbr. Name
Manual
cSI
Thin film
Unit
FFu
Fill factor for voltage
>0...1 (0.8)
0.8
0.72
-
FFi
Fill factor for current
>0...1 (0.9)
0.9
0.8
-
Cu
Scaling factor for U
OC
(1
>0...1 (0.08593)
0.08593
0.08419
-
Cr
Scaling factor for U
OC
(1
>0...1 (0.000109)
0.000109
0.0001476
m²/W
Cg
Scaling factor for U
OC
(1
>0...1 (0.002514)
0.002514
0.001252
W/m²
alpha
Temperature coefficient for I
SC
(2
>0...1 (0.0004)
0.0004
0.0002
1/°C
beta
Temperature coefficient for U
OC
(1
-1...<0 (-0.004)
-0.004
-0.002
1/°C
(1 Uoc = Open circuit voltage of a solar panel
(2 Isc = Short-circuit current (=max. current) of a solar panel
