Estimação de Parâmetros de Modelo de Sistemas Fotovoltaicos utilizando Algoritmo de Levenberg-Marquardt Modificado

ABSTRACT This paper proposes an algorithm for the estimation of the parameters of a photovoltaic system model. We propose to use a modified Levenberg-Marquardt algorithm to enhance the estimates of the two resistences (series and parallel) in an one-diode photovoltaic model. The estimation precision of the proposed approach is compared to other three methods. The simulation of the photovoltaic systems using the obtained parameters provides the characteristic curve and the power generated by the photovoltaic system. Methods are applied to interpolate the points of the IxV curves obtained by simulation, so that these IxV curve can be compared with the IxV curves provided by the datasheet of the Kyocera KC200GT photovoltaic module. The results show that the curve generated with the parameters estimated through the proposed algorithm presents the smallest mean square error compared to the other considered methods.