In this work, it is presented a topology of a DC electronic load for photovoltaic panels using DC-DC converters. The DC electronic load was designed for four operation modes, which are constant voltage, current, power and resistance. Moreover, it uses boost converters and bidirectional buck-boost along with double-loop sliding mode controller (SMC) and PI controllers. The use of the SMC with the DC-DC converters leads to a ripple reduction, as well as to robustness and a reduced sensitivity to variations to external parameters and disturbances. For validation, simulation results are provided. Resumo: Neste trabalho, apresenta-se uma topologia de uma carga eletrônica para painéis fotovoltaicos utilizando-se conversores CC-CC. A carga eletrônica foi projetada para quatro modos de operação, tensão, corrente, potência e resistência constantes, além disso utiliza os conversores boost e a buck-boost bidirecional em conjunto com controladores sliding mode (SMC) e PI em dupla malha. O uso do SMC em conjunto com conversores CC-CC permite uma redução ripple, além de robustez e uma sensibilidade reduzida para variações de parâmetros e distúrbios externos. Resultados de simulação foram realizados para validar o projeto.
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