Introduction
This paper follows up on a previous assessment and overview of energy system reliability challenges experienced during the February 2021 extreme cold weather event which affected the land area comprising the Electric Reliability Council of Texas (ERCOT) grid system. Winter Storm Uri significantly impacted the existing electrical grid, especially in Texas, serving as an important data point for assessing grid resilience and reliability. This discussion considers how the ongoing energy transition process may affect overall system reliability and how energy storage in its various forms may affect not only system resilience and reliability but costs to consumers, owners, shareholders, and those who manage risks, i.e., insurers and risk managers.
Electrical system grid resilience is the ability of a system to withstand adverse events and its ability to adapt to such…