Resilient decentralized event-triggered control for interconnected power systems under aperiodic DoS attacks

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Abstract

This work investigated the decentralized load frequency control (LFC) problem for multi-area power systems with renewable energy sources under aperiodic denial-of-service (DoS) attacks. A decentralized resilient event-triggered mechanism (DRETM) was proposed, in which a standard output-based ETM governs transmissions during DoS-free intervals and a forced recovery transmission is introduced after each DoS-active interval, enabling prompt closed-loop recovery while explicitly accounting for network transmission delays. A decentralized dynamic output-feedback (DOF) switched controller was developed without centralized state collection. Sufficient conditions are derived for local exponential stability and weighted H_∞ attenuation under aperiodic DoS attacks. The neighboring-area frequency terms were recognised as internal physical interconnection inputs rather than independent disturbances. After the decentralized controller gains were recovered, the original physical feedback was explicitly restored and the complete two-area closed loop was verified by a fixed-gain joint stability condition with two independent equivalent-delay channels.

Keywords

dynamic output-feedback control / aperiodic DoS attacks / resilient event-triggered mechanism / decentralized load frequency control

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