User Manual

Page 77
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
3.11.15.4 Simulation mode
Apart from the panel technology there is also a simulation mode to select. Four options:
Mode U/I Controllable simulation. Voltage (U
MPP
, in V) and current (I
MPP
, in A) in the maximum power point
(MPP) are variable during runtime. The purpose of this mode is to directly shift the MPP into
various directions.
Mode E/T Controllable simulation. During runtime, the irradiation (E from german “Einstrahlung”, in W/
m²) and surface temperature (T, in °C) of the simulated solar panel are adjustable. This also
impacts the curve and the resulting MPP. The purpose of this mode is to analyse the impact of
temperature and/or irradiation on the performance of a solar panel.
Mode DAY U/I Automaticsimulationrun,processingadaytrendcurveconsistingofupto100,000pointsdened
by values for U
MPP
, I
MPP
and time.
Mode DAY E/T Automaticsimulationrun,processingadaytrendcurveconsistingofupto100,000pointsdened
by values for irradiation, temperature and time.
3.11.15.5 Day trend
The so-called day trend is a special simulation mode for long-term tests. It processes a curve consisting of up to
100,000user-denablepoints.Foreveryprocessedpointonthatcurve,thePVcurveiscalculatedanew.
Everypointisdenedby3valuesofwhichoneisthedwelltime.Whendeninglongdwelltimesthedaytrend
curve can be supported by an interpolation feature which can be optionally activated. It will calculate and set in-
termediate points between two succeeding curve points. Hence it should be considered to run the day trend with
or without interpolation.
Thedaycurvepointshavetobeloadedintothedevice,eitherfromaCSVleonUSBstickorviadigitalinterface.
The user selects the number of points according to the requirements of the simulation.
FormatsoftheCSVlestoloadfromUSBstickwhenmanuallyconguringthefunction:
• For Mode DAY E/T(requiredlenameformat:PV_DAY_ET_<arbitrary_text>.csv)
Column A = Index
Anascendingnumberbetween1and100,000(therstempty
index will cause the simulation to stop)
Column B = Irradiation (E) in W/m²
Allowed range: 0...1500
Column C = Temperature (T) in °C
Allowed range: -40...80
Column D = Dwell time in milliseconds (ms)
Allowed range: 500...1.800.000
• For Mode DAY U/I(requiredlenameformat:PV_DAY_UI_<arbitrary_text>.csv)
Attention! The values in columns B and C are real values which must not exceed the ratings of
thedeviceorthedevicewillneglecttoloadthele.
Column A = Index
Anascendingnumberbetween1and100,000(therstempty
index will cause the simulation to stop)
Column B = Voltage U
MPP
in V
Allowed range: 0...rated output voltage of the device
Column C = Current I
MPP
in A
Allowed range: 0...rated output current of the device
Column D = Dwell time in milliseconds (ms)
Allowed range: 500...1.800.000
The number format and the column separator in the CSV les is determined by the regional
settings of the PC or the software used to create the les. The format must match the selection
for the device setting “USB le separator format” in the General Settings menu of the device,
else the device would neglect loading the le. For example, an american Excel should by default
use the dot as decimal separator and the comma as column separator, which would match the
selection “USB le separator format = US”.