Improved distributed event-triggered control for inverter-based AC microgrids under deceptive cyberattacks

Abstract In this paper, a novel event-triggered-based control (ETC) method is proposed for an islanded AC microgrid with deceptive attacks. An event-triggered mechanism with state-independent threshold is adopted to update the control signals for reducing unnecessary data communications. The success ratio of launched attacks is considered to reflect the failure possibility of the attack signals passing through the microgrid protection devices. The main objective is to design an ETC-distributed controller for ensuring that the entire system can achieve bounded consensus in spite of deceptive cyberattacks. The proposed ETC method can achieve bounded consensus in terms of mean square convergence by adopting stochastic stability theory and Lyapunov function. An algorithm is provided to optimize bounded consensus. A microgrid test system is simulated on MATLAB/SIMULINK to illustrate the effectiveness of the proposed controller design scheme.