Distributed Resilient Control Strategy of DC Microgrids Against False Data Injection Attacks (FDIAs)

The distributed control paradigm prevails in existing control methods of DC microgrids since it offers high scalability and reliability. However, the distributed communication networks that facilitate sharing information between neighboring control agents are vulnerable to cyber-attacks. False data injection attack (FDIA) is the most common of many cyber-attacks and has a serious impact on the system so that it is worth studying. In this paper, a distributed resilient control strategy for DC microgrids is developed against FDIAs on the communication network. In contrast to the existing remedies for attacks, we consider multiple FDIAs on consensus algorithm at the same time. Firstly, the influence of FDIA occurrence in the consensus algorithm of secondary control in DC microgrids is analyzed. Then, a distributed resilient control strategy is developed, in which the fixed reference voltage in the secondary control is designed as an adaptive reference voltage to mitigate the impact of FDIA. Simulation results verify the effectiveness of the proposed method.