Desarrollo de un prototipo de cargador de baterías fotovoltaico con MPPT

Abstract

This project describes the analysis, design and simulation of a prototype system to charge a battery using photovoltaic energy. This project is divided into 3 subsystems; the first is the Power Regulation Subsystem, which incorporates a SEPIC type DC-DC converter, powered by a photovoltaic panel; the second is the Voltage Regulation Subsystem, which is powered by the previous subsystem and incorporates a BUCK-type DC-DC converter; finally the third is the Measurement and Control Subsystem, which is responsible for controlling the previous subsystems mentioned, the first through the MPPT algorithm using the Disrupt and Observe (P&O) method for maximum use of solar energy by extracting maximum power from the photovoltaic panel, and the second through a PID control, because the subsystem works with a closed control loop to regulate the flow of energy to the battery with a constant voltage, which depends on the characteristics of the battery used. The project includes the sizing of the elements obtained by performing a stable state analysis of the DC-DC converters, acquiring the necessary equations for the selection of each device for future implementation, it also has an educational use because it works at low power so voltage and current measurements can be made in a simpler way; the research carried out, as well as the results that were obtained allow scalability at higher power levels.