| Title | A Localized Cyber Threat Mitigation Approach For Wide Area Control of FACTS |
| Publication Type | Conference Paper |
| Year of Publication | 2021 |
| Authors | Chattopadhyay, Abhiroop, Valdes, Alfonso, Sauer, Peter W., Nuqui, Reynaldo |
| Conference Name | 2021 IEEE International Conference on Communications, Control, and Computing Technologies for Smart Grids (SmartGridComm) |
| Date Published | oct |
| Keywords | Conferences, control systems, cyber threat mitigation, damping, flexible AC transmission systems, Flexible AC Transmission Systems (FACTS), Human Behavior, inter-area oscillations, Metrics, modal analysis, Oscillators, pubcrawl, resilience, Resiliency, Smart grids, threat mitigation, Timing, wide area control systems |
| Abstract | 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. |
| DOI | 10.1109/SmartGridComm51999.2021.9632302 |
| Citation Key | chattopadhyay_localized_2021 |
A Localized Cyber Threat Mitigation Approach For Wide Area Control of FACTS