Generalized Extended State Observer-Based Distributed Attack-Resilient Control for DC Microgrids

Due to the attack signal injection on the DC microgrid system, voltage regulation and current sharing cannot be guaranteed and the overall system may even be destabilized. To solve this problem, a generalized extended state observer (GESO)-based distributed attack-resilient control method is proposed for DC microgrids in this paper. The presented control scheme can detect and mitigate the unknown dc/low-frequency/grid-frequency attack signals while achieving voltage regulation and accurate current sharing among distributed generation (DG) units. In addition, benefiting from employing the proposed distributed control strategy, the information exchange among the DG units is updated in an aperiodic way. As a result, the communication burden of the DC microgrid communication network can be greatly reduced. The stability of the proposed method is verified by the Lyapunov function, and no Zeno behavior will exist. Finally, the experimental results are illustrated to validate the effectiveness of the proposed approach.