Research on Grid-Connected Photovoltaic Charging Piles

Against the backdrop of increasing electric vehicle ownership and growing electricity demand for charging piles, grid-connected photovoltaic charging piles have emerged as a crucial means to alleviate grid pressure, reduce charging costs, and promote sustainable energy supply. This study addresses issues such as efficiency, stability, and power quality in switch topologies like boost, bidirectional buck-boost, and single-phase inverters by applying the maximum power transfer theorem and adopting strategies such as variable step-size Perturb and Observe method, PID control, and current-voltage PI control. Through experiments and simulations, the proposed strategies effectively control grid connection, enhance system performance, meet grid connection standards, provide new insights for theoretical research, and promote the development of the PV charging pile industry, thereby facilitating collaborative progress in the new energy sector.