Distributed Resilient Secondary Control for DC Microgrids Against Heterogeneous Communication Delays and DoS Attacks

In this article, a cooperative resilient control method for DC MG is proposed to dispel the adverse influences of both communication delays and DoS attacks. To avoid that the sampling period is captured by intelligent attackers, a new time-varying sampling period and an improved communication mechanism are firstly introduced under the sampling control framework. Based on the designed sampling period and communication mechanism, a resilient secondary controller is designed based on the sampling and communication mechanism. It is theoretically shown that the developed method can achieve the goals of bus voltage restoration and current sharing even in the presence of both DoS attacks and heterogeneous communication delays. Finally, a DC MG test system is built in a controller-hardware-in-the-loop testing platform to illustrate and verify the effectiveness of our developed method against both communication delays and DoS attacks.