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David,
<blockquote
cite="mid:4314799704078A479DAFA31C5DED9DC70235BA3D@MAILSERVICE.ad.ulster.ac.uk"
type="cite">
<p><font size="2">1) Would it be better to use the combined PV
inverter model or have separate PV and Inverters?<br>
</font></p>
</blockquote>
I would tend towards trying to keep the simulated system as close as
possible to the actual system ; so separate PV and inverter models. The
exception is that most of the PV models have a maximum power point
tracker built into them while in reality, MPPTs are usually part of the
inverter or the charge controller. <br>
<blockquote
cite="mid:4314799704078A479DAFA31C5DED9DC70235BA3D@MAILSERVICE.ad.ulster.ac.uk"
type="cite">
<p><font size="2">2) As my actual system uses 4 inverters how can I
make them common with the main power conditioning unit? I can't link
these in the simulation studio. In the real system this controls
whether we use power from the PV array, battery array, mains or diesel
generator.<br>
</font></p>
</blockquote>
Again, I would take guidance from the actual system. If the PV strings
are each connected to their own inverter and those inverters all feed
into the power conditioning unit, you can probably combine the inverter
output with an equation and pass it on to the power conditioning unit.
If the power conditioner is doing clever things with the power at its
input then you may be best off writing a new component to model how it
interacts with the PVs and with the load since this tends to be very
specific to a given project. You might look at the project profile that
was written on a hybrid power system that included wind, pv, fuel
cells, a battery bank, and an electrolyzer a few years back. We tried
for awhile to use existing controllers but quickly realized that the
logic that was built into the actual system's controller would be much
better modeled with a custom component.
(<a class="moz-txt-link-freetext" href="http://www.trnsys.com/ProjectProfiles/FuelCellsProjectProfile.pdf">http://www.trnsys.com/ProjectProfiles/FuelCellsProjectProfile.pdf</a>)<br>
<br>
Kind regards,<br>
David<br>
<br>
<br>
<br>
<br>
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