heinzinger ERS Compact Series, User Manual, Page: 96 / 114

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Page 96
ERS COMPACT
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
3.11.13
,
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
EA 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 defaults 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