Abstract
Reliability and resiliency assessment of an electrical distribution network (DN) for extreme disasters are essential for system optimization and future planning. Conventional reliability indices may not be effective in characterizing dynamic disturbance events in DNs. A unique opportunity to empirically explore these issues arose when a week of unseasonably cold weather moved through the State of Oklahoma. On October 26, 2020, a rare ice storm resulted in one of the most widespread power disruptions ever experienced in the state's history. This article documents the outcomes of an investigation conducted in collaboration with a utility provider who operates and maintains one of the affected DNs. Based on supplied network data, this article explores the quantification of operational resilience for a more insightful characterization of outage events. The results demonstrate important failure mechanisms and potential opportunities to improve resiliency.
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