A Localized Cyber Threat Mitigation Approach For Wide Area Control of FACTS

Chattopadhyay, Abhiroop; Valdes, Alfonso; Sauer, Peter W.; Nuqui, Reynaldo

doi:10.1109/smartgridcomm51999.2021.9632302

A Localized Cyber Threat Mitigation Approach For Wide Area Control of FACTS

Conference · 25 October 2021 · 2021 IEEE International Conference on Communications, Control, and Computing Technologies for Smart Grids (SmartGridComm)

DOI:https://doi.org/10.1109/smartgridcomm51999.2021.9632302· OSTI ID:2223078

Chattopadhyay, Abhiroop ^[1]; Valdes, Alfonso; Sauer, Peter W.; Nuqui, Reynaldo

Hitachi Energy

We propose a localized oscillation amplitude monitoring (OAM) method for the mitigation of cyber threats directed at the wide area control (WAC) system used to coordinate control of Flexible AC Transmission Systems (FACTS) for power oscillation damping (POD) of active power flow on inter-area tie lines. The method involves monitoring the inter-area tie line active power oscillation amplitude over a sliding window. We use system instability - inferred from oscillation amplitudes growing instead of damping - as evidence of an indication of a malfunction in the WAC of FACTS, possibly indicative of a cyber attack. Monitoring the presence of such a growth allows us to determine whether any destabilizing behaviors appear after the WAC system engages to control the POD. If the WAC signal increases the oscillation amplitude over time, thereby diminishing the POD performance, the FACTS falls back to POD using local measurements. The proposed method does not require an expansive system-wide view of the network. We simulate replay, control integrity, and timing attacks for a test system and present results that demonstrate the performance of the OAM method for mitigation.

Research Organization:: Hitachi Energy, Raleigh, NC; University of Illinois at Urbana Champaign, Champaign, IL

Sponsoring Organization:: USDOE Office of Cybersecurity, Energy Security, and Emergency Response (CESER)

DOE Contract Number:: OE0000897

OSTI ID:: 2223078

Journal Information:: 2021 IEEE International Conference on Communications, Control, and Computing Technologies for Smart Grids (SmartGridComm), Journal Name: 2021 IEEE International Conference on Communications, Control, and Computing Technologies for Smart Grids (SmartGridComm)

Country of Publication:: United States

Language:: English

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Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
cyber threat mitigation
Flexible AC Transmission Systems (FACTS)
inter-area oscillations
modal analysis
wide area control systems.

A Localized Cyber Threat Mitigation Approach For Wide Area Control of FACTS

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