Mermoud/Lejeune module and inverter model documentation

Hello,

I am trying to use the Mermoud/Lejeune models present in the latest SDK 2018.11.11 and PySAM.
I was looking for a detailed documentation on both Mermoud/Lejeune module and inverter models, but did not find anything useful. 
I was able to run the module model successfully  but have doubts regarding the Extended Faiman temperature model. 
For the inverter model the documentation does not have the definition of parameters.

It would be nice to have a detailed documentation for these models.

Thanks,
Neel Patel

Hi Neel,

For the Mermoud-Lejeune model, please see: github.com/NREL/ssc/issues/26 .

For SAM inverter models, see the list of references at sam.nrel.gov/photovoltaic/pv-sub-page-2.html .

Best regards,
Paul.

Dear Paul,

Thank you for the documentation links. I would like to point out that the inverter model documentation does not contain details about the Mermoud/Lejeune inverter model.

I am trying to setup the Mermoud/Lejeune inverter model present in PySAM 1.2. I have doubts regarding the input to the following parameters:

1. ond_effCurve_Pdc
2. ond_VNomEff
3. ond_CompPMax
   
4. ond_CompVMax
   
5. ond_ModeAffEnum
6. ond_ModeOper
   

The PySAM documentation of this inverter model does not specify any details. Also the datatype for these parameters is mentioned, but how to formulate the data is not mentioned. Also, input to some of these parameters is a string, but which specific strings can be assigned is not mentioned.

An example or details for this inverter model will be quite helpful.

Thanks and Regards,
Neel

Hi Neel,

For a little background, NREL PySAM is a Python wrapper that provides access to SSC. The SAM user interface also provides access to SSC. SSC is a collection of renewable energy performance and financial models that includes the "OND inverter" model in question. Its source code is here: github.com/NREL/ssc/blob/develop/shared/lib_ondinv.cpp . SAM does not provide access to the OND inverter model or Mermoud/Lejeune module model, but you can access them in SSC using the SDK or PySAM .

The OND inverter model was originally developed as part of PVsyst. The list of PVsyst references in its Help system is here: files.pvsyst.com/help/references.htm . There is also some documentation of PVsyst models on Sandia's PV Modeling Collaborative website: pvpmc.sandia.gov/ .

You may want to explore the PVsyst documentation (linked above) for descriptions of the inverter inputs.

Best regards,
Paul.

Hi Paul,

We've been exploring quite a bit already, but it seems like some essential technical details are missing. 

It would be really helpful if we could get an PySAM example using InverterMermoudLejeuneModel as well as the MermoudLejeuneSingleDiodeModel.

Many thanks!

Anton

Hi Anton,

I agree that documentation of those models would be useful. They are not NREL models, so we do not have access to any unpublished model details.

Best regards,
Paul.