Parameter translation for single-diode PV models based on explicit identification

The need for real-time identification techniques for photovoltaic (PV) model parameters has pushed the research toward the development of methods that employ explicit equations for identifying the five parameters of the PV single diode model (SDM). In this paper, the use of suitable translation methods in association to two explicit identification methods, previously validated under Standard Test Conditions (STC), is analyzed for a specific class of PV panels, namely panels whose SDMs have negligible series resistance. The study demonstrates that the proposed methods allow the SDM parameters to be properly determined under any operating condition using explicit formulas. The effectiveness of the proposed approach is assessed on the basis of experimental data concerning two commercial PV panels.