PAN File Solver

[Junaid Fatehi]

I wrote a solver to determine the resistance values and diode ideality tempco.  It is based off 2 papers by Kenneth Sauer et all.  It uses lmfit for the least squares minimization.  I'm sure the minimization can be done in scipy but lmfit makes it really easy.  Please feel free to use.

https://github.com/jhfatehi/pv/blob/main/pan_solver.py

I don't work in the PV industry anymore so I don't have access to Pvsyst or flash test data.  The following still needs to be done.

1. Agreement with Pvsyst Pmp values for the same modeling values needs to be verified to determine if Pvsyst diode model is implemented properly in the solver.
2. I tested the solver with model generated data and got the same modeling parameters back.  The solver still needs to be tested with real measurement data.

Junaid Fatehi

[cwh...@sandia.gov]

Hi Junaid,

Thanks for sharing this. Any objections to porting this to a pvlib function? We'd maintain attribution in the code documentation. I think it would be a nice complement to the functions already in pvlib.ivtools.sdm.

Cheers,

Cliff

[Junaid Fatehi]

No objection.  Please go ahead.  Reach out if you have any questions.

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