Resiliency is a complex, multi-dimensional topic that is difficult to capture in a single metric. Current efforts and analytical frameworks for assessing and measuring resiliency are diverse and lack a unifying perspective – there is no standardized framework for assessment or for evaluating investment options. Despite this, it may be possible to organize the metric identification and development process around a consistent framework. This report synthesizes and analyzes current metrics and analytical frameworks used to measure power system resiliency.
The EPRI resiliency matrix presented in this report maintains that resiliency assessment for the electric power sector is most effective when tied to two specific dimensions – threats and vulnerabilities. Visualizing the intersection of a particular threat with a particular vulnerability assists utilities with quantifying the impact of a particular threat on the system, identifying mitigation strategies, and determining what metrics are most appropriate for measuring system resiliency.