A novel event-triggered secondary control strategy for microgrid considering time-varying delay

• Introduces a hybrid event-triggered mechanism for optimized microgrid communications.. • Validates control strategy stability using Lyapunov theory for voltage and frequency regulation. • Ensures adaptability to diverse network topologies with minimal deployment requirements. To enhance the efficiency of communication in distributed microgrids (MGs), this study introduces a novel event-triggered secondary control strategy that incorporates time-varying delays. Unlike traditional continuous event-triggered controls that risk Zeno behavior, and periodic controls that fail to utilize all data effectively, compromising control quality and real-time performance, this strategy employs a hybrid approach. Each distributed generator (DG) within the MG is treated as an agent, and the control system is designed based on multi-agent consensus theory, allowing for a dynamic switch between periodic sampling and continuous event triggering. The formulation of the event-triggered function for the secondary controller is detailed, and its stability is validated using Lyapunov stability theory. Simulation results confirm that this innovative controller achieves precise secondary regulation of voltage and frequency, along with accurate power sharing among DGs, significantly reducing the need for frequent communication.