A Novel Robust Hierarchical Consensus Algorithm with Application in DC Nanogrids Coordination

This research investigates the delay sensitivity of discrete-time consensus among agents which communicate over a scale-free network with hubs. in this paper, a novel hierarchical consensus algorithm, based on the idea of virtual communication graph degree reduction, is proposed. as a result, a significant consensus speed gain is obtained which provides a potential time margin for applying cyber-physical techniques that cause systematic input delay. this approach provides robustness and resiliency in case of any communication topology disturbance during cyber- physical attacks or plug-and-play events. the feasibility of plug- and-play, which has the potential to increase the input delay, is presented based on the gained margin as a sample scenario. the algorithm application in the coordination of distributed photovoltaic resources of several nano-grids communicating over a scale-free network, is assessed via simulation as well.