Event-Triggered based Distributed Secondary Control for Islanded AC Microgrids Considering Unreliable Communications

The event-triggered based distributed secondary control (DSC) methods of AC microgrid have more advantages than the traditional periodic communication DSC methods due to their much better economic efficiency with little communication burden. However, the robustness towards the unreliable communication channels need more concerns. This paper studies a proposed event-triggered based DSC method with the consideration of unreliable communication. The "unreliable" means that the broadcast signal in channel from one Distributed Generation (DG) to its neighboring DGs can drop the random control packets. Additionally, packets may suffer from time-varying communication delays. Theatrical result shows that even given this challenging scenario, the proposed Event-triggered Control Method (ECM) can still realize frequency and voltage restorations and accurate active power sharing asymptotically while reducing communication traffics among the DGs. Test system in MATLAB/SIMULINK is built for validation.