Efficient Energy Management in a PV–Battery Hybrid System Using a Single-Stage Bidirectional Converter
Keywords:
MPPT, Solar Panel, Fuzzy Logic, Grid,DC-DC ConverterAbstract
The increasing penetration of renewable energy sources necessitates efficient and reliable power conversion systems for seamless grid integration. This paper proposes a single-stage bidirectional power conversion system for interfacing a solar photovoltaic (PV) and battery energy storage system with the AC grid. The system employs a voltage source inverter (VSI) with an LCL filter to enable bidirectional power flow while maintaining high power quality and system stability.A centralized control strategy is developed to regulate the DC link voltage, manage battery energy, and ensure synchronization with the grid. The control scheme effectively coordinates power exchange between the DC and AC sides under different operating modes, including battery-to-grid and grid-to-battery operation. The model is implemented and simulated using MATLAB/Simulink to validate system performance.Simulation results demonstrate that the DC link voltage is well regulated with minimal ripple, while the grid and load currents remain sinusoidal with low harmonic distortion. The system achieves near unity power factor and ensures stable battery operation with controlled state of charge. The proposed configuration offers a compact, efficient, and cost-effective solution for hybrid renewable energy systems and smart grid applications.
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