Modelagem e Análise da Dinâmica Não-Linear de um Conversor Multiportas

Abstract

Over the last few decades, the demand for renewable energy sources has been growing steadily. One of the main contributing factors is the high dependence on fossil fuels and the environmental impacts generated by them. In this context, solutions that allow the integration of multiple renewable energy sources for various applications become quite attractive, given the high intermittency of their power supply. While there are already several topologies with this functionality in the literature, they receive little emphasis and are not approached from the perspective of nonlinear dynamics, a behavior commonly present in most DC-DC converters. Therefore, the work consists in validating the model of a multiple-input converter, as well as applying the theory of bifurcation for the study of its nonlinear dynamics to provide guidelines for the practical design of the converter topology and its control. By means of the obtained simulation results, it was possible to verify a wide range of stability for the variation of physical parameters of the converter, as well as to observe the interference of losses and non-idealities in its behavior. Furthermore, it was possible to compare the pros and cons of the different control strategies for the adopted converter.