Import GPI data from real values to PVSYST

[Sergio Jimenez]

Hi everyone.

 

I want to ask if it is possible to import GPI data obtained from a PV plant with trackers into PVSYST in order to obtain an aproximation of the energy exported from the plant and compare with the real measured energy of the plant.

I tried to import using the PVSYST standard format but it only allows one specific tilt angle for the GPI. Is it possible to import the GPI data obtained from a piranometer installed in the trackers to PVSYST and simulate with this GPI data?

 

Thank you very much.

[Linda Thoren]

Hello,

You can import Measured global on plane (GlPMeas) via the "custom file" tool. You then need to define the Orientation definition and here you can define a tracker.

PVsyst will reverse engineer (we use the term reverse-transpose) the GHI and DHI. In the end the discrepancy between the original value and the one in the simulation will differ for a given hour of less than a percent. Over the year the difference should be negligible. You should use the Hay transposition for more robust results with the retro-transposition. This is further explained in the following PVsyst help:
https://www.pvsyst.com/help/glossary/solar-geometry/plane-orientation.html