Dynamic Event-Triggered H∞ Load Frequency Control for Multi-Area Power Systems Subject to Hybrid Cyber Attacks

• Published in: IEEE transactions on systems, man, and cybernetics. Systems Vol. 52; no. 12; pp. 7787 - 7798
• Main Authors: Wang, Jing, Wang, Dongji, Su, Lei, Park, Ju H., Shen, Hao
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.12.2022; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Control systems design; Controllers; Convexity; Cyberattack; Cybersecurity; Denial of service attacks; Dynamic event-triggered scheme; Frequency control; H-infinity control; hybrid cyber attacks; Hybrid systems; load frequency control; multi-area power systems; Optimization; Performance indices; Power system dynamics; Power system stability; Stability criteria; Symmetric matrices; Thermal stability
• ISSN: 2168-2216; 2168-2232
• DOI: 10.1109/TSMC.2022.3163261

This article aims at designing a dynamic event-triggered <inline-formula> <tex-math notation="LaTeX">\mathcal {H}_{\infty } </tex-math></inline-formula> load frequency controller for multi-area power systems affected by false data-injection attacks and denial-of-service attacks. A dynamic event-triggered scheme, whose threshold parameter varies with objective system states, is employed to make rational use of limited network bandwidth resources and improve the efficiency of the data utilization. Then, taking the impacts of the aforementioned hybrid cyber attacks into consideration, an attractive system model is established. Whereafter, several sufficient conditions, which can guarantee the exponential mean-square stability with a preset <inline-formula> <tex-math notation="LaTeX">\mathcal {H} _{\infty } </tex-math></inline-formula> performance index of the studied system, are obtained through utilizing Lyapunov stability theory. Additionally, the desired controller is designed via handling convex optimization problems. Finally, a simulation example is displayed to explain the validity of the proposed method.