The grid withstood an unprecedented combination of challenges in 2021 — extreme and sustained weather events, increasingly sophisticated and severe cyber and physical threats, and the urgent need to reliably integrate the rapidly growing fleet of inverter-based resources — that tested grid reliability, resilience, and security.
State of Reliability
In spite of these conditions, NERC’s 2022 State of Reliability, which looks at past performance, found that operators maintained grid reliability with one notable exception — the February 2021 Texas and South-Central United States cold weather event that led to the largest controlled load shed event in North American history.
