kjs55 Posted March 17, 2021 Share Posted March 17, 2021 Hi,Someone recently pointed out to me that there's a mismatch between the equation for shunt resistance (Rsh) in the PVsyst help menu linked in Ref.  and Eqs. - of the paper in Ref.  (incidentally, also Eqs. - of the more recent paper in Ref. ; the latter paper incorporates the temperature-(not just irradiance)-dependence of PV module performance into the PVsyst one-diode model). Firstly, Eq.  of Ref.  is not in the PVsyst Help Docs in Ref.  at all. Reportedly (according to Ref.  within the paper in Ref. ), Eq.  in Ref.  came from a personal/private communication with the paper's author. Secondly, the term Rsh_base is replaced by Rsh_ref in the PVsyst help documents. It would be good if the PV community can reference the PVsyst help menu in Ref.  instead of the papers in Refs. - when it comes to applying the PVsyst one-diode model. For example, the Photovoltaic Performance Modeling Collaborative (PVPMC) community's website (Ref. ) and the associated, relevant PVLIB Toolbox function (Refs. -) could then reference the PVsyst Help Docs in Ref.  instead of the paper in Ref. . If possible, please advise, and, if necessary, please update the PVsyst help menu in Ref.  in order to clarify this point. Thanks.References: https://www.pvsyst.com/help/. Then navigate to "Physical models used" > "PV Module - Standard one-diode-model" > "Rshunt exponential behavior vs irradiance". K. J. Sauer and T. Roessler, “Systematic approaches to ensure correct representation of measured multi-irradiance module performance in PV system energy production forecasting software programs,” IEEE J. Photovoltaics, vol. 3, no. 1, pp. 422-428, Jan. 2013. K. J. Sauer, T. Roessler, and C. W. Hansen, “Modeling the irradiance and temperature dependence of photovoltaic modules in PVsyst,” IEEE J. Photovoltaics, vol. 5, no. 1, pp. 152-158, Jan. 2015. https://pvpmc.sandia.gov/modeling-steps/2-dc-module-iv/diode-equivalent-circuit-models/PVsyst-module-model/ https://pvlib-python.readthedocs.io/en/stable/generated/pvlib.pvsystem.calcparams_pvsyst.html https://pvlib-python.readthedocs.io/en/stable/_modules/pvlib/pvsystem.html#calcparams_pvsyst/ Link to comment Share on other sites More sharing options...
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