Dynamic Self-Triggered Load Frequency Control for Multi-Area Power Systems Under Non-Ideal Communication Environments

Multi-area power systems (MAPSs) consist of multiple area subsystems, exchanging power between each area to maintain a balance of supply and demand. With the introduction of communication facilities, traditional load frequency control (LFC) methods and event-triggered communication mechanisms may not be effective due to network-induced delays and external attacks caused by non-ideal environments. In this paper, a decentralized LFC algorithm with a novel dynamic self-triggered mechanism (DSTM) for MAPSs under non-ideal communication environments is proposed to ensure secure operation. The proposed DSTM employs a dynamic threshold, a rest time interval and an internal dynamic variable, which can extend triggering intervals and effectively avoid Zeno behavior. AnH∞stability criterion and a co-design criterion are derived by a switching-based Lyapunov-Krasovskii functional. Comparison simulations and hardware-in-the-loop experiments verify the superiority and effectiveness of the proposed scheme.