Controller design for a flyback coverter in operating interconnected to grid mode, for photovoltaic applications
Keywords:Flyback converter, microinverter, photovoltaic panel
This article presents the modeling of a flyback converter integrated in a two-stage photovoltaic microinverter with grid connection, and the design of the respective controllers. The idea is to obtain the dynamic modeling of the DC / DC converter in order to implement a type of control that allows it to operate as a current source and in turn allows to regulate the input voltage, based on the signal resulting from the location point algorithm. maximum power. This control scheme is novel and has been documented by some authors using boost type converters. Therefore, the great contribution of this article lies in the use of this novel scheme to take advantage of the maximum energy coming from the panels, using a converter that has the characteristic of galvanically isolating the generation from the rest of the circuit. To validate the operation of the flyback under study, simulations were carried out in PSIMTM. Finally, the conclusions are presented.
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