Quantifying resilience for distribution system customers with SALEDI
arXiv:2602.07684
The paper introduces SALEDI, a logarithmic resilience metric that quantifies customer impact during large blackout events by transforming customer minutes interrupted, and demonstrates its accuracy and usefulness with outage data from multiple utilities.
Abstract
The impact of routine smaller outages on distribution system customers in terms of customer minutes interrupted can be tracked using conventional reliability indices. However, the customer minutes interrupted in large blackout events are extremely variable, and this makes it difficult to quantify the customer impact of these extreme events with resilience metrics. We solve this problem with the System Average Large Event Duration Index SALEDI that logarithmically transforms the customer minutes interrupted. We explain how this new resilience metric works, compare it with alternatives, quantify its statistical accuracy, and illustrate its practical use with standard outage data from five utilities.