Battery integrated solar photovoltaic energy management system for micro-grid

This paper proposes a battery energy management system (BEMS) for photovoltaic (PV) powered micro-grid, where the system would like to reduce the operational time of diesel generator (DG). Due to fast variations in the solar irradiance, the BEMS need to smooth the PV power fluctuations. Hence, an energy storage system is required to mitigate the PV power fluctuations. Novelty of this BEMS is to manage multiple types of batteries to reduce DG run time while extend batteries life time by controlling the batteries charge/discharge rate. The control methodology will keep the batteries charge/discharge rate within the safety limit. The proposed BEMS for micro-grid has seven modes of operation based on batteries state-of-charge, dynamic behavior of the load power, and PV power. Practical data have been used to verify the functionality of the developed BEMS for micro-grid. The performance of the proposed BEMS has been tested through the MATLAB/Simulink software.

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