Abstract
The biggest challenge of solar energy is the intermittency of energy produced, since it depends on the availability of sun and real-time weather conditions. This intermittency is a concern for large-scale grid connected photovoltaic (PV) system to provide stable and reliable energy production. Battery energy storage system (BESS) can support to solve this intermittency by producing stable energy and provide smooth generation. Integrating the BESS with PV system in large-scale grid will control the energy flow from PV system to make sure to produce stable energy and balance between the demand and generation. This paper investigates an energy management mechanism for large-scale grid connected photovoltaic (PV) systems with batteries. The proposed system consists of a 1 MW PV system and 1 MW lithium-ion batteries connected to the grid by DC-DC converters and DC-AC inverters. MATLAB-SIMULINK is used to simulate the PV-batteries system under different circumstances of various irradiance and temperature levels. The proposed energy management strategy is verified by the results of simulation.
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