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Volume 8 Issue 11
Nov.  2021

IEEE/CAA Journal of Automatica Sinica

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Article Contents
Xin Zhao, Suli Zou and Zhongjing Ma, "Decentralized Resilient H∞ Load Frequency Control for Cyber-Physical Power Systems Under DoS Attacks," IEEE/CAA J. Autom. Sinica, vol. 8, no. 11, pp. 1737-1751, Nov. 2021. doi: 10.1109/JAS.2021.1004162
Citation: Xin Zhao, Suli Zou and Zhongjing Ma, "Decentralized Resilient H Load Frequency Control for Cyber-Physical Power Systems Under DoS Attacks," IEEE/CAA J. Autom. Sinica, vol. 8, no. 11, pp. 1737-1751, Nov. 2021. doi: 10.1109/JAS.2021.1004162

Decentralized Resilient H Load Frequency Control for Cyber-Physical Power Systems Under DoS Attacks

doi: 10.1109/JAS.2021.1004162
Funds:  This work was supported by the National Natural Science Foundation (NNSF) of China (62003037, 61873303)
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  • This paper designs a decentralized resilient H load frequency control (LFC) scheme for multi-area cyber-physical power systems (CPPSs). Under the network-based control framework, the sampled measurements are transmitted through the communication networks, which may be attacked by energy-limited denial-of-service (DoS) attacks with a characterization of the maximum count of continuous data losses (resilience index). Each area is controlled in a decentralized mode, and the impacts on one area from other areas via their interconnections are regarded as the additional load disturbance of this area. Then, the closed-loop LFC system of each area under DoS attacks is modeled as an aperiodic sampled-data control system with external disturbances. Under this modeling, a decentralized resilient H scheme is presented to design the state-feedback controllers with guaranteed H performance and resilience index based on a novel transmission interval-dependent loop functional method. When given the controllers, the proposed scheme can obtain a less conservative H performance and resilience index that the LFC system can tolerate. The effectiveness of the proposed LFC scheme is evaluated on a one-area CPPS and two three-area CPPSs under DoS attacks.

     

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    Highlights

    • In the presence of DoS attacks, the closed-loop LFC model of each area is modeled as an aperiodic sampled-data system with external disturbances
    • A transmission interval-dependent looped functional is proposed to obtain new BRL and controller design method against the modeled system above
    • A decentralized resilient H∞ LFC scheme is presented in this paper. By regulating the parameters on H∞ performance index or the maximum count of continuous data losses, the designed controller can maintain the stability of system frequency with guaranteed H∞ performance and enhanced resilience to DoS attacks

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