Novel modeling approach for photovoltaic arrays

This paper proposes high accuracy modeling approach for photovoltaic (PV) arrays. I-V characteristic of PV cell is described by nonlinear equation that´s complicated to be solved by the ordinary mathematical methods. The main theme of this contribution is to use a robust algorithm to solve for all single diode model parameters. This technique uses two adjustment steps depending on comparing modeling results to the experimental data provided by the commercial datasheets. Based on the single-diode model, the parameters are determined in the sense of minimum model error. The proposed model is then validated with experimental data of Solarex MSX60 solar module. The superiority of this technique is proved by computing the absolute errors to have a maximum error as 1.3% of module short circuit current. Finally, the proposed model is used to study the effect of different parameters variations on the PV module.