Distributed Hierarchical Resilient Event-Triggering Control for DC Microgrids Under Mixed Cyber Attacks

Distributed control techniques are commonly employed to regulate the functionality of DC microgrids. However, the communication process in distributed control is highly susceptible to cyber attacks, with the most prevalent being denial of service (DoS) and false data injection (FDI) attacks. DoS attacks interrupt communication, while FDI attacks compromise data authenticity. The incidence of these two types of attacks in the microgrids system will make the distributed controllers unable to operate normally, resulting in the system being unable to operate safely and stably. To maintain the stable operation of the DC microgrids system against mixed DoS and FDI attacks, a distributed hierarchical resilient event-triggering controller is developed. The controller is comprised of two subcontrollers and an event-driven supervisor. The two subcontrollers are designed to operate based on feedback from either the bus voltage error or the branch current error. The supervisor selects the appropriate subcontroller based on the current state of the system. The Matlab/Simulink environment is utilized to construct a test system for DC microgrids, showcasing the effectiveness of the distributed hierarchical resilient event-triggered controller.