Distributed Optimal Power Control for Islanded AC‐DC Hybrid Microgrids Based on Dynamic Event‐Triggered Mechanism

ABSTRACT For islanded AC‐DC hybrid microgrids with limited communication resources, this paper proposes a distributed secondary optimal power control strategy based on a dynamic event‐triggered mechanism. By introducing incremental costs associated with powers, distributed secondary frequency control in AC subnet and distributed secondary voltage control in DC subnet are designed to ensure the restoration of frequency and voltage to the references, and the optimal power sharing. Moreover, the communication frequency between distributed generators is reduced by triggered communication, which is determined by the preset dynamic triggered thresholds. By using Lyapunov stability theory, this paper rigorously proves the stability of the control system. Finally, simulations results verify the effectiveness of the designed control strategy.