Evaluation and determination of seven and five parameters of a photovoltaic generator by an iterative method

TL;DR

This paper presents an iterative Newton-Raphson based method for accurately determining seven and five key parameters of photovoltaic generator models, enhancing real-time diagnostic and optimization capabilities.

Contribution

It introduces a fast, iterative parameter identification method using Matlab/Simulink for single and two diode photovoltaic models, improving accuracy and efficiency.

Findings

High agreement between experimental and simulated PV characteristics.

Method is suitable for real-time applications.

Effective for both single and two diode models.

Abstract

The mathematical modeling of solar cells is essential for any optimization operation of the efficiency or the diagnostics of the photovoltaic generator. The photovoltaic module is generally represented by an equivalent circuit whose parameters are experimentally calculated by using the characteristic current-tension, I-V. The precise determination of these parameters stays a challenge for the researchers, what led to a big diversification in the models and the digital methods dedicated to their characterizations. In the present paper; we are interested in the parametric characterization of a model in both following cases: with single and two diodes, in order to plan the behavior of the photovoltaic generator under real functioning conditions. We developed an identification method of the parameters using Newton Raphson's method by using the software Matlab/Simulink. This method is a fast technique which allows the identification of several parameters and can be used in real time applications. The results of the proposed method show a high agreement between the experimental and simulated characteristics photovoltaic generator.