Module parameter extraction and simulation with LTSpice software model in sub-Saharan outdoor conditions

Abstract

In this work, a hybrid algorithm of Levenberg-Marquardt and empiric analytic method is proposed to solve the recurring convergence problem that occurs during the module parameters extraction with the iterative method. The proposed method aims to avoid divergence and a long computation time due to the improper initial value. Elsewhere, LTSpice photovoltaic cell model is developed to simulate the extracted parameters in sub-Saharan outdoor conditions. The LTSpice model with it virtual component is expected to facilitate the understanding photovoltaic module behavior under these conditions. Measurements performed with VSP50P-12V polycrystalline module and compared to simulation results show the accuracy of the hybrid method and the ease of LTSpice model. The hybrid algorithm with RMSE value of 0.9% while correlation one is greater than 97% for simulated irradiation is more accurate than the Levenberg-Marquardt algorithm.

Simulation Study of Perovskite Cell Performance in Real Conditions of Sub-Saharan Africa

“…[7], we extracted the data of the one-diode model with five parameters ℎ , 0 , , , and ℎ , respectively the photo-generated current, saturation current, ideality factor, series resistance and the parallel resistance to carry out our study. The hybrid Levenberg-Marquardt-analytical algorithm proposed by Kata et al [8] is used to extract these parameters. This algorithm combines the analytical [9] and empirical method to calculate the initial values needed by the Levenberg-Marquardt algorithm making it not only fast and robust but also accurate as shown in [8].…”

“…The hybrid Levenberg-Marquardt-analytical algorithm proposed by Kata et al [8] is used to extract these parameters. This algorithm combines the analytical [9] and empirical method to calculate the initial values needed by the Levenberg-Marquardt algorithm making it not only fast and robust but also accurate as shown in [8]. At the end of the extraction the algorithm plots the I-V characteristic corresponding to the extracted data and compares it with the initial I-V characteristic.…”