Distributed Observer-Based Finite-Time Control of AC Microgrid Under Attack

In this article, a novel distributed observer-based finite-time control scheme is proposed to improve the resilience of islanded AC microgrids under attack. Existing research on microgrids under attack mainly focuses on detection technology and attenuation technology, but rarely considers the key indicator of convergence speed. The proposed control strategy can accelerate the convergence process of microgrids under attacks. The designed controller can converge the frequencies and voltages of the attacked microgrid to the reference values within a finite time, while achieving accurate power sharing. The proposed strategy has an improved performance compared with the conventional control methods against attack by applying finite-time theory. The effectiveness of the control in case of different types of attack is verified by the simulation of an islanded AC microgrid in MATLAB/Simulink.