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raulrpearson / PVSystems

A Modelica library for photovoltaic system and power converter design
https://raulrpearson.github.io/PVSystems/
MIT License
32 stars 11 forks source link

if construct in PV cell wrong #8

Closed max-privato closed 3 years ago

max-privato commented 5 years ago

Consider example model PVArrayVerification. When run, the current goes to zero near the end of the simulation. This means that the model does not simulate negative currents when voltage overcomes OCV. However, if I change temperature Tn, for instance from 298.15 to 298.15+10, the current the cell delivers goes negative: this is because the internal if: is: if v < 0 then i = v/((Rs + Rp)/Np); elseif v > Vocn then i = 0; else i = -Np*(Ipv - Id - Ir); end if; i.e., it switches to i=0 when V>Vocn, with, for temperatures different from the nominal, is different from the actual open-circuit voltage.

raulrpearson commented 5 years ago

As mentioned on the other issue, it's a long time since I did this. Is this still a problem for you? If it is, I might be able to carve out some time to look into it.

max-privato commented 3 years ago

Personally I don't need this ticket to be solved anymore. So, it just your decision. Thank you for your consideration of my report.