Resilient Control Strategy for DC Microgrid Clusters with Bidirectional Power Flow Under Cyber Attacks

This paper proposes a resilient control strategy for DC microgrid (DCMG) clusters with bidirectional power flow to achieve both the power-sharing and voltage restoration under several cyber attacks. First, a distributed tertiary control based on the decentralized secondary control approach is utilized not only to guarantee the power balance but also to reduce the communication burden for the DCMG cluster system. To maintain the system stabilization under cyber attacks, an integral term is added to the power agents in the proposed controller to mitigate the negative effect of false data injection (FDI) attacks. In addition, the power and voltage regulations can be ensured by the proposed control strategy even under denial-of-service (DoS) attacks. Several simulations are conducted for the DCMG cluster system with bidirectional power flow based on the PSIM software to demonstrate the reliability of the proposed control strategy.