Projeto de um conversor boost para rastreamento do ponto de máxima potência de um painel solar fotovoltaico

Abstract

This work presents the design and implementation of a boost converter applied to the maximum power point tracking (MPPT) of a solar photovoltaic panel. The converter operates in CCM (Continuous Conduction Mode), with input voltage of 17.56V (from a 10 W solar photovoltaic panel). The method of power point tracking is based on the P&O (perturb and observe) algorithm. The design of proposed converter – determination of semiconductor devices, output capacitor and boost inductor – are detailed addressed. The digital control is implemented in an Arduino Mega 2560 platform. Further, the design and implementation of an instrumentation circuit, responsible for interfacing the current and voltage sensors with the analog-digital converters of the microcontroller – are presented. Finally, the design of an auxiliary voltage source (flyback converter), responsible for sourcing the control and instrumentation circuits is addressed. To validate the project and the MPPT algorithm, it has been used the photovoltaic array emulator Keysight E4360A.