Dear David and
all Trnsys users,
The thank you
for the information for the inverter, I have managed to find
the data for the data file. Coming back to the trnsys
plug-in of type 194, the plug-in seems to work in a
mysterious way.
If I select a
specific photovoltaic type from the list no data are
available.
If I add
manually some data on the plug-in, the 5 parameters are
identical to example.var’s parameters.
Is there
something missing from my plug-in? Am I doing something
wrong?
Thank you
Sotiris
From: David BRADLEY [mailto:d.bradley@tess-inc.com]
Sent: Thursday, July 18, 2013 7:57 PM
To: TRNSYS users mailing list at the Solar Energy
Lab, UW-Madison
Cc: Sotiris Papantoniou
Subject: Re: [TRNSYS-users] Question related to
the inverter of type 194
Sotiris,
The file contains the inverter efficiency as a function of
the input power (in watts) and the input voltage (in volts).
These values are typically published by manufacturers on the
inverter specification sheets. If you do not have such a sheet
then you can use the example data file and scale the input
voltage and power to the range of input voltage and power that
you need. Inverters tend to be quite efficient (around 95%)
except when the input power is below about 5 to 10% of the
rated input power at which point their efficiency drops quite
a lot.
Kind regards,
David
On 7/18/2013 02:28, Sotiris Papantoniou
wrote:
Hello Trnsys users,
I am trying to model a pv-system with
inverter. I have managed to model the photovoltaic modules
using the plug-in, but now I have to model the inverter of
the system. The characteristics of the inverter are partly
set in the parameters of the type and the external file
inserted by the user. Where can I find the information which
are related to this file.
Thank you
Sotiris
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David BRADLEY
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Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
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d.bradley@tess-inc.com
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