Simulation and Operational Evaluation of Distributed Storage Devices Connected to a Direct Current Distribuition Nanogrid

This paper presents the modelling of a DC nanogrid composed of distributed photovoltaic generation and battery banks. The MATLAB/SIMULINK environment is used to simulate the components. The real DC nanogrid, located outside the laboratory of the Grupo de Estudos e Desenvolvimento de Alternativas Energéticas (GEDAE) at the Universidade Federal do Pará (UFPa) in Belém-Pará, Brazil, provided measured data for model validation. The electronic devices had their operational performance and the power quality at connection points of the storage systems evaluated. During the period with the photovoltaic generation, it was verified that during the real operation of the system, there were moments of overvoltage at the terminals of the battery banks and along the DC distribution nanogrid, this was also identified in the simulated case. The simulation results showed good agreement with the measurements, indicating the applicability of the model.