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Distributed controlled DC microgrids rely on peer-to-peer (P2P) communication to regulate average voltage and proportional current sharing. These P2P communications are more exposed and highly vulnerable to cyber threats. This paper aims to develop a cyber-resilient dynamic average consensus control for an autonomous multi-bus DC microgrid. The proposed dynamic average resilient controller is designed to accurately track the DC microgrid network average voltage despite false data injection (FDI) attacks and restore it to nominal value while ensuring proportional current sharing. The developed resilient strategy is valid for any weight-balanced directed and undirected graphs. It guarantees resiliency against strategic stealthy and destabilizing FDI attacks in actuator and communication channels. The stability and convergence studies of the proposed resilient controller are carried out using input-to-state stability analysis and the Lyapunov technique. The simulation studies are carried out to validate the resiliency of the DC microgrid with the proposed controllers against actuator and communication layer FDI attacks. The developed strategy is also realized using a lab-scale DC microgrid prototype model, and its performance is evaluated under different attack scenarios.
Tadepalli et al. (Fri,) studied this question.