Encontro de Energia no Meio Rural

Abstract

MACHADO NETO, Lauro de Vilhena Brandão, CABRAL, Claudia Valeria Távora, DINIZ, Antônia Sônia Alves Cardoso et al. Desenvolvimento de conversor eletrônico para máxima transferência de potência em sistemas fotovoltaicos aplicados à eletrificação rural. In Procedings of the 5th Encontro de Energia no Meio Rural, 2004, Campinas (SP) [online]. 2004 [cited 09 October 2024]. Available from: <http://www.proceedings.scielo.br/scielo.php?script=sci_arttext&pid=MSC0000000022004000100045&lng=en&nrm=iso> .

The maximization of the efficiency in the electric energy conversion is essential to the developing of technical and economic viability of photovoltaic solar energy systems. This paper presents the development of an electronic converter with maximum power point tracking for photovoltaic systems applied to rural electrification. The standalone photovoltaic system used is similar to the systems installed by Companhia Energética de Minas Gerais - CEMIG in the schools of isolated communities, inside the Solar Light Program. Initially were developed test procedures of the equipments used in the system like photovoltaic generators, electronic ballasts, inverters, charge controllers and batteries, covering minimum performance requirements and in compliance with national and international standards, as possible, due to the instrumentation availability. A data acquisition system was assembled to monitoring the photovoltaic system. A simulation of the system was implemented and the aims were to optimize the project and carry out a comparative study with the monitoring results. The converter with maximum power point tracking consists of a direct current converter in the buck configuration and the control algorithm was implemented in a microcontroller, being the first results presented here. After finished the prototype, it will be incorporated in the photovoltaic system and will be accomplished a study of the technical and economic viability. The first results of the tests, of the monitoring and of the converter with maximum power point tracking are helping the sustainability of the systems installed by CEMIG, funding the government initiatives in the quality control of equipments and promoting the development of national technology.

Keywords : Sistemas fotovoltaicos; Ensaios de Equipamentos; Monitoramento de Sistemas; Rastreamento do Ponto de Potência Máxima.