University of Tennessee at Chattanooga,
Keywords: cyber-physical systems (CPS), Internet of Things (IoT), smart infrastructure, critical infrastructure protection
Summary:The 2013 Presidential Policy Directive on Critical Infrastructure (CI) Security and Resilience defined 16 sectors of infrastructure that, if attacked, could be debilitating to national security and safety. One such sector is “Energy,” where the electric power grid is categorized. Energy CI is unique because it enables the remaining sectors, which makes protecting it especially critical. Because most power utilities in the United States are privately owned, they typically lack resources needed to conduct long-term, interdisciplinary research into power grid architecture that is secure and resilient against both physical and cyber threats. Our goal is to create a comprehensive defense-in-depth approach—layered defensive mechanisms—to protect valuable data and equipment, improve operational resilience, and maintain interoperability with dynamic grid cybersecurity objectives. Our work is focused on the development of an automated, comprehensive, hierarchical process capable of analyzing smart power grid waveform data directly from the recorded files. Our hierarchical process is capable of identifying seventeen unique electrical disturbance events that correspond to four unique categories with an overall success rate of over 97%. It is important to note that the developed approach is in operational use by the local power utility and is ongoing with Tennessee Valley Authority (TVA).