ESTIMATION OF PARAMETERS FOR MODELLING OF PHOTOVOLTAIC PANELS USING A MODIFIED LEVENBERG
MARQUARDT ALGORITHM
DOI:
https://doi.org/10.59627/cbens.2016.2044Keywords:
Parameters estimation, photovoltaic system, characteristic curveAbstract
This article proposes a method of estimation of parameters for simulating photovoltaic panels. The model used to represent the photovoltaic panel is based on a diode and two resistors. A contribution of this work is the estimation of parameters (parallel and series resistance) of the photovoltaic panel through an algorithm that minimizes the square error of the obtained curve with the real I-V characteristic curve. The real curve is sampled from the datasheet including some provided points (short circuit current, open circuit voltage and maximum power current and voltage). We propose in this work a variation of the Levenberg-Marquardt algorithm for minimizing the error between the curves and, at the same time, passing through the maximum power point of the photovoltaic panel. The results of the proposed algorithm for the model parameters are compared with those of other studies in the literature. The effectiveness of this approach is also validated by comparing the obtained I-V curve with the real curve and those provided by other models from the literature. Finally, the results related to the photovoltaic module's behavior with the estimated parameters are presented.
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