User Manual

Page 74
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
PSB 9000 2.5 kW Series
Schematic diagram: Application and result:
U
I
Isc
Uoc
MPP
Impp
Umpp
Adjust all four parameters on screen to the desired values.
While the simulation is running, the user can see from the actual
values (voltage, current, power) of the DC output, where the operat-
ing point of the power supply or of the simulated solar panel is. The
adjustable value Irradiance (0%...100% in 1% steps, see screenshot
below)helpstosimulatedi󰀨erentlightsituationsfromdarkness(no
power output) to the minimal amount of light that is required to make
the panel provide full power.
Varying this parameter shifts the MPP and the PV curve along the Y
axis. Also see diagram to the right. The value Irradiance is here used
as a factor for the current Impp. The curve itself isn’t permanently
re-calculated.
► How to congure the PV table
1. In the function generator menu tap on , then
and then .
2. Adjust the four parameters as required for the simulation.
3. Do not forget to adjust the global limits for voltage and power in
the next screen which you can access with touch area . The
voltage (U) setting should be at least as high as U
oc
, or higher.
Irradiance 0..100%
U
I
Uoc
MPP
4. After setting the values for the required signal generation, tap on touch area .
While loading, the IU function is calculated and sent to the internal XY generator. After this, the function is ready
to run.
The function can be saved to USB stick as table after every calculation, as well as read via any
of the digital interfaces.
FromthescreenwheretheXYfunctiongeneratoriscontrolledmanually(start/stop),youcangobacktotherst
screen of PV table function and use the formerly locked touch area to save the table to USB drive. In order to
do so, follow the on-screen instructions. The table can be used to analyse the values or to visualise it in Excel or
similar tools.
► How to work with the PV table function
1. With an appropriate load connected, for example a solar inverter, start
the function as described in 3.11.4.1.
2. Adjust value Irradiance with any rotary knob between 100% (default)
and0%,inordertoreproducedi󰀨erentlightsituationsforthesimulated
panel. The actual values on the display indicate the working point and
can show whether the simulation has arrived at the MPP or not.
3. Stop the function run anytime as described in 3.11.4.1.