With the rapid development of renewable energy technologies, the focus of energy research has shifted towards distributed photovoltaic, wind power, and other new energy sources. The increasing penetration of renewable energy and the growing complexity of power grids, including large-scale energy storage, electric vehicles, and charging infrastructure, pose significant challenges to traditional power distribution systems. These systems struggle to ensure stable operation and efficient utilization of renewable energy. To address challenges such as the integration of distributed renewable energy, coal-to-electricity transition, and rising power loads, advanced power equipment for distribution networks has become a key research area. Among these, AC/DC flexible interconnection devices have gained attention due to their controllability in load transfer, voltage quality improvement, and operational optimization. This paper proposes a multi-port AC/DC flexible interconnection topology to enable flexible interconnection of distribution stations and stable power supply for distributed energy sources (e.g., photovoltaic, energy storage) and AC/DC loads (e.g., data centers, EV charging piles). A mathematical model and control strategy are developed, featuring a multi-port flexible interconnection control method based on virtual synchronous generator (VSG) technology. This approach supports regional power flow coordination and efficient renewable energy utilization. The effectiveness of the proposed control strategy is validated through PSCAD simulations, demonstrating its potential to enhance grid stability and renewable energy integration.