Distributed Sliding-Mode-Based Resilient Secondary Restoration Control for Islanded Microgrid Under Unforeseen Influence

Islanded microgrid brings advantages with more flexibility, decarbonization, affordability and social equity. In potential real-world applications, some issues are raised up: (i) unexpected loads from end-user demand and line impedance mismatches in physical system; (ii) topology variations and invading information in control signal under unforeseen network environments. This paper proposes a distributed sliding-mode based resilient secondary restoration control to deal with load changes and cyber-attacks. Through virtual impedance method, an accurate power sharing control strategy is developed to tackle line impedance mismatches. Then, a unified microgrid secondary control system model under denial-of-service and false data injection attacks is established. Sufficient conditions related to with hybrid dynamic characteristics are conducted for robust analyses. Evaluation tests show that this development has practical significance on power distribution with voltage and frequency stability in microgrid.