In this study, a distributed resilient control (DRC) scheme is proposed for inverter-interfaced autonomous AC microgrids (MGs). Due to unavoidable telecommunication vulnerabilities, time-delays already exist in communication links, and it seriously impresses the stability and performance of the network. Due to this fact, non-uniform time-varying communication delays are considered on the communication links (here, information exchanges between neighboring local controllers of DGs and BESSs). The authors consider a time-varying topology for distributed energy resources to address the uncertainties of communications links, improve flexibility, and enhance the security of the system against cyber-attacks. Stability analysis is characterised based on the Lyapunov–Krasovskii theory, and sufficient conditions for a precise and comprehensive control algorithm are derived in terms of linear matrix inequalities (LMIs). The provided LMIs yield the upper bound of the time delay, which guarantees the stability of the system. Finally, to evaluate the performance of the control law, offline digital time-domain simulation studies are performed on a test MG system in a MATLAB/Simulink environment, and also the results are compared with previously reported methods.

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Resilient distributed control of BESSs and voltage source converter-based microgrids considering switching topologies and non-uniform time-varying delays

References

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