Projeto da etapa de driver de led de um sistema de iluminação autônomo fotovoltaico

Abstract

Although Brazil has na electric generation, transmission and distribution system capable of serving a large part of its área, in many locations there is still no public lighting, as in isolated places and needy communities. The ideal solution to this problem would be to expand the power grid. This, however, becomes impracticable due to the high costs of installing and maintaining these systems. Currently, there are several electronic systems without connection to the electric power grid, also called off-grid operating autonomously. In general, these systems consist of a generation source, a storage unit and a load, and would be a viable way o implementing public lighting in several locations. This work aims to dimension, design and simulate the LED driver mode of na autonomous lighting system with a focus on high performance. The system will consist of a photovoltaic panel, LEDs, a battery and a bidirectional converter, responsible for conditioning the energy between the parts, both in driver mode, in which this work is focused, and in battery charger mode. From the simulations carried out, results consistent with the expected were obteined, proving that it is possible to implement the system. In addition, na efficiency of 98,712% in the open loop system fe by its nominal input voltage. Thus, it is intended that the results of this work will lead in the future to a viable, autonomous, high-performance final product that meets the needs of the locations where it is intended to be installed.