Impacts of Earthquakes on Electrical Grid Resilience

TL;DR

This paper reviews the impacts of major earthquakes on the U.S. Pacific Northwest's electrical grid, emphasizing the need for improved resilience through systematized experiences and innovative design strategies.

Contribution

It compiles historical earthquake data and innovative regional ideas to guide enhancements in grid design, construction, and operation for better earthquake resilience.

Findings

Historical earthquake experiences inform resilience strategies

Innovative ideas from other regions can improve grid design

Guidelines for enhancing electrical grid resilience against earthquakes

Abstract

One of the most complex and devastating disaster scenarios that the U.S.~Pacific Northwest region and the state of Oregon faces is a large magnitude Cascadia Subduction Zone earthquake event. The region's electrical grid lacks in resilience against the destruction of a megathrust earthquake, a powerful tsunami, hundreds of aftershocks and increased volcanic activity, all of which are highly probable components of this hazard. This research seeks to catalyze further understanding and improvement of resilience. By systematizing power system related experiences of historical earthquakes, and collecting practical and innovative ideas from other regions on how to enhance network design, construction, and operation, important steps are being taken toward a more resilient, earthquake-resistant grid. This paper presents relevant findings in an effort to be an overview and a useful guideline for those who are also working towards greater electrical grid resilience.