Research on Dynamic Optimization and Stability Analysis Model of Distributed Energy Resources Access in Hybrid AC/DC Microgrid

AC-DC hybrid microgrid combines the high efficiency of DC microgrid with the universality of AC microgrid, which provides strong support for the flexible access and efficient utilization of Distributed Energy Resources (DER). Firstly, this paper introduces the system structure of AC-DC hybrid microgrid, including AC bus and DC bus, micro-source, energy storage device and load. Then, this paper puts forward a dynamic optimization model, aiming at improving energy utilization, reducing system loss and ensuring the stability and reliability of power supply. Through accurate modeling and cooperative control strategy, the model realizes optimal scheduling and cooperative operation among devices. In addition, the static and transient stability analysis models are established to evaluate the stability of the system under small disturbance and large disturbance. By validating both the experimental system and the simulation model, the results demonstrate that the optimized model enhances energy efficiency, minimizes system losses, and maintains power supply stability. This study offers theoretical and technical support for the continued advancement and implementation of AC-DC hybrid microgrids.