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A Distributed Cyber-attack Detection Scheme with Application to DC Microgrids

Gallo, AJ; Turan, MS; Boem, F; Parisini, T; Ferrari-Trecate, G; (2020) A Distributed Cyber-attack Detection Scheme with Application to DC Microgrids. IEEE Transactions on Automatic Control 10.1109/tac.2020.2982577. Green open access

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Abstract

DC microgrids often present a hierarchical control architecture, requiring integration of communication layers. This leads to the possibility of malicious attackers disrupting the overall system. Motivated by this application, in this paper we present a distributed monitoring scheme to provide attack-detection capabilities for linear Large-Scale Systems. The proposed architecture relies on a Luenberger observer together with a bank of Unknown-Intput Observers (UIOs) at each subsystem, providing attack detection capabilities. We describe the architecture and analyze conditions under which attacks are guaranteed to be detected, and, conversely, when they are stealthy . Our analysis shows that some classes of attacks cannot be detected using either module independently; rather, by exploiting both modules simultaneously, we are able to improve the detection properties of the diagnostic tool as a whole. Theoretical results are backed up by simulations, where our method is applied to a realistic model of a low-voltage DC microgrid under attack.

Type: Article
Title: A Distributed Cyber-attack Detection Scheme with Application to DC Microgrids
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/tac.2020.2982577
Publisher version: https://doi.org/10.1109/tac.2020.2982577
Language: English
Additional information: This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/.
Keywords: Electrical Power Systems, fault detection, cooperative control, estimation, cyber-attack detection
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10094920
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