A Reconfigurable Photovoltaic and Battery System with Maximum-Power-Point Tracking and Load Sharing

The increasing global demand for renewable energy sources, particularly solar photovoltaic (PV) power, highlights the need for efficient energy storage solutions and improved system stability. This paper presents a novel approach to solve these challenges through a reconfigurable PV and battery hybrid control platform based on modular multilevel series/parallel technology. The proposed system enables coordinated operation of PV and battery sources within a single system, offering enhanced flexibility and improved energy utilization. By employing a flexible configuration of PV and battery modules, the system optimizes power generation by ensuring each PV operates at its maximum power point for as long as possible, while mitigating the negative effects of rigid connections. The battery module seamlessly adapts to PV output and load fluctuations, ensuring stable output at the DC bus voltage. Moreover, the integration of balancing chokes minimizes current fluctuations caused by sudden voltage changes. Simulation results validate the effectiveness of the proposed topology and control strategy, demonstrating its ability to meet system operation requirements.