Round-Robin-Based Cooperative Resilient Control for AC/DC MG Under FDI Attacks

In this article, the Round-Robin (RR) based cooperative resilient secondary control problem for ac/dc microgrid (MG) under false data injection (FDI) attacks is solved. To solve the problem, a cooperative resilient control method is proposed, which consists of a decentralized iterative observer, a RR scheduling protocol, and a distributed resilient secondary controller. Specifically, a decentralized iterative observer is first designed to estimate the state of the ac main bus voltage amplitude, ac bus frequency, bidirectional interlinking converter (BIC) active/reactive power, and FDI attacks. Then, a RR scheduling protocol is introduced to reduce communication among BICs. Based on the designed iterative observer and the RR scheduling protocol, a distributed resilient secondary controller is designed to compensate the influence of FDI attacks. Compared with existing resilient control strategies in hybrid ac/dc MGs under FDI attacks, the proposed resilient cooperative control method can exhibit better transient performance with less communication. Finally, the efficacy of the proposed approach is confirmed through experiments in a real-time simulator OPAL-RT.