Addressing the complexity of electromechanical transient analysis in large-scale alternating current（AC）/direct current（DC） hybrid power systems

this paper proposes a linearized model.Based on the differential-algebraic equation framework of power systems， an overall design is conducted， models for AC and DC networks are established， mathematical models for dynamic and static components are developed， coupling relationships between components are clarified， and ultimately a linearized model of the hybrid system is generated. Simulation results demonstrate that the linearized model established in this paper significantly reduces computational dimensionality and complexity， with a clear modeling process and high computational efficiency， thereby providing an effective theoretical model and technical solution for rapid stability assessment and optimal control of large-scale hybrid AC/DC systems.