Visita aos Conceitos de Modelo Chaveado, Médio e de Pequenos Sinais de um Conversor CC-CC
Keywords: Distributed generation, Photovoltaic system, Modeling, Linearization, Computer simulation
AbstractThis paper, as part of the activities developed in the scope of a R&D+I, a review is carried out the fundamentals of switched, average and small-signal models of DC-DC converters, in order to provide clear and objective concepts. Starting from a PWM modulator, the concepts of the switching function and its Fourier series decomposition are presented to obtain the switched model of a converter. Based on the averaging operator, the averaged model and its stationary states are defined, which are the starting point for linearization of the converter. Writing the state and output vectors in the form of multivariable functions, the Taylor series is used to obtain the small-signal and linearized models of the converter. The results of the numerical solutions, their analysis and conclusions reveal the characteristics and applications of the models.