Distributed Resilient Secondary Voltage Control for AC Microgrids Under DoS Attacks

As a cyber-physical system (CPS), alternative current (AC) microgrids (MGs) are vulnerable to cyber attacks which affect communication systems and thus, cause serious system stability issues. In this paper, a resilient control design algorithm is proposed to solve the secondary voltage restoration problem in AC MGs in the presence of denial-of-service (DoS) attacks. It is theoretically proved that the proposed control method can achieve voltage restoration and guarantee the overall stability of the MG system subject to DoS attacks. In order to illustrate the proposed scheme, simulation studies are carried out based on an islanded AC microgrid system with four distributed generators (DGs) built in the MATLAB Simulink environment. The simulation results show its effectiveness and verify the established theoretical results.