Procedure for applying IEC-61853 test data to a single diode model

Accurate modeling of a photovoltaic module´s current-voltage characteristic is essential to predicting the generated power at any operating condition. This paper presents an approach to improve prediction accuracy of current single diode models by leveraging test data collected according to the IEC-61853 standard. Modified auxiliary diode model equations are proposed, along with a procedure to automatically calculate the additional model parameters from test data. The extended single diode model indicates potential to reduce average maximum power point prediction error across a wide temperature and irradiance range by about 75 % relative to the baseline five parameter model.