Desenvolvimento de um sistema bombeamento fotovoltaico com maximização das eficiências do arranjo fotovoltaico e do motor elétrico

Abstract

This work aims the study of a standalone photovoltaic pumping system,optimizing not only the efficiency of the photovoltaic conversion, using amaximum power point tracking algorithm, but also minimizing the losses in the induction motor that drives the centrifugal pump. This kind of work has not yet received much attention to this specific application and consists in operating the motor at its maximum efficiency which, in association with the maximum power point tracking of the photovoltaic array, renders the whole system even more efficient. The principle behind this technique is quite simple and it is based on the control of stator voltage. Computer simulations were carried out to investigate how to work close to the minimum losses point and propose a minimum losses point tracking (MLPT) algorithm. Then, it was tested on the experimental system to quantify its improvement.