-
Posts
2038 -
Joined
-
Last visited
Everything posted by André Mermoud
-
After defining the data you want to get in the CSV file, please don't forget to check "Datafile output / Output on filename" top left. The file will be available at the end of the next simulation. The simulation will notify you where it is located (i.e. in your workspace \Userdata\). NB: You have to re-check the option "Output on filename" at each executions when you want an output file. NB2: This is fully explained in the help "Project design > Simulation > Simulation: export ASCII file", available by F1 in the importing tool. You have access to the Help by F1 (or little questionmark buttons for mor specific information) from everywhere in the software. Please use it.
-
These are not significant. You can let all these values to 0. See the help "Project design > P50 - P90 evaluations"
-
simulation of trackers systems with fixed tilt structure together
André Mermoud replied to AnnerJhoan's topic in How-to
Sorry, this is not possible in PVsyst in the present time. You have to define 2 different variants (i.e. perform two different simulations). -
How PVSyst calculates power output based on given area
André Mermoud replied to dn.stankiewicz's topic in How-to
Please explain where you found this functionnality. I don't see any place in PVsyst giving directly an energy production as function of the ground area. This information would require to define a GCR, as well as a plane orientation. -
Bugs in Bi-facial System Definition User Interface
André Mermoud replied to kjs55's topic in Problems / Bugs
This is normal. The values mentioned (and modifiable) in the bi-facial tool are intended to analyze your Bi-facial system in diverse conditions. This is a pedagogic tool. If you have specified a 3D scene (with sheds or trackers), the simulation will take the parameters corresponding at best to these definitions in the 3D construction. This is mentioned on the dialog: The only parameter which is really defined here and not specified in the 3D scene is the "Height above the Ground". -
By which amount ? The shading calculation principles are very different between the 3D and the Unlimited sheds models. However if you correctly define the 3D scene (i.e. by observing the hypothesis of the "unlimited sheds", i.e. very long sheds or rows), both simulations usually give close values. Now the optimum tilt angles have a very broad maximum: large interval in tilt may lead to very little yield differences. So that the maximum tilt may be significantly different even with little simulation differences.
-
No this is not yet possible. Please see our FAQ How can I include an inverter in a Stand-alone system?
-
There is now a way of defining the tariffs in hourly values on a CSV file.
-
No, there are no PVsyst distributors in any country. The company PVsyst SA is the only distributor for the whole world.
-
selfconsumption optimisation using water heating control
André Mermoud replied to Etienne Guerin's topic in How-to
Yes, you can define a "normal" system with self-consumption and storage, and consider the energy injected into the grid as the heating energy of the hotwater tank. The battery sizing is completely dependent on your requirements (load profile, PV power and required self-consumption). -
No, this result is not available in PVsyst. The only way is to perform 2 simulations, with systems equivalent to each sub-array.
-
The simpler way is to redefine your inverter with 3 MPPT inputs, and attribute one sub-array to each input. The mismatch between orientations (i.e. between strings in different orientations) is usually very low (a fraction of %). You can check this by defining one sub-array with a "mixed" orientation. Here the calculation is correct, as it uses the mix of both I/V curves.
-
Yes, if you define a "table" or an array of "tables", you have the opportunity of giving a slope to the baseline of your table. However this will change the orientation of your plane. See the FAQ "With sheds on a tilted roof, PVsyst changes my orientation"
-
Yes, this means the proportion of data coming from Satellite data.
-
The "Module quality loss+ is a parameter at your disposal, for any purpose. Only the default value proposed by PVsyst is based on the PV module tolerance specification. Please see the FAQ How to define the "Module quality loss" ?
-
This is really strange as this file should not be located here, in any way... This is the second case of this problem. I don't know how this could arise. Please delete the PVsyst.INI file, this should solve the problem.
-
This is really strange as this file should not be located here, in any way... I don't know how this could arise. Please delete the PVsyst.INI file, this should solve the problem.
-
pv loss due to irradian level at positive
André Mermoud replied to PAVAN91ROC's topic in Problems / Bugs
A gain due to the low-light efficiency is possible, especially in very sunny places. However this usually indicates that the PAN file has been specified with a very high series resistance, resulting in high low-light performance. See the FAQ How are specified the PAN files in the PVsyst database ? -
Non-zero inverter generation when GlobInc equals zero
André Mermoud replied to ebaughman's topic in Problems / Bugs
I really don't see how this could arise. Please send us an example, at support@pvsyst.com -
What you need is indeed provided by the "Grid system", using the "Grid storage" option, "Peak shaving". However this option doesn't define a DC converter in parallel with the Inverter yet. The Inverter is supposed to deliver the extra-power for the battery, so that it should be sized for accepting the peak power during the best days. We will develop this feature in a next version. In the mean time, the results with an oversized inverter sould be quite equivalent to a separate DC converter.
-
Multiple Year Single File Hourly Output Simulation
André Mermoud replied to joubert's topic in How-to
You can define different conditions from simulation to simulation using the Batch mode. Each simulation may produce an Hourly CSV file. But these resulting hourly CSV files will be independent. If you want to gather them in one only file you have to do that manually. -
Using Measured Data for Bifacial Tracker projects
André Mermoud replied to BGiolitti's topic in Meteo data
You can indeed import the POA measured on your trackers. But be careful: this measurement is subject to the same mutual shadings on the diffuse part than the value calculated by the simulation (linear shading loss on the loss diagram). So this measurement is not really suited for a good simulation. The best way is to use the measured Global horizontal. If you have also the diffuse at disposal, this is indeed the top for the accuracy of the transposition models. Now the Rear side irradiance measurement is extremely delicate, as the reflected irradiance is not homogeneous behind the tracker. In the present time this measurement is not useable as input for the simulation. The relationship between this value and the GlobBack calculated by PVsyst is not well established.