top of page

FERC Issues Reliability Orders Designed for Extreme Weather Events

The Federal Energy Regulatory Commission (FERC) recently issued Order No. 896, “Transmission System Planning Performance Requirements for Extreme Weather”, and Order No. 897, “One-Time Informational Reports on Extreme Weather Vulnerability Assessments Climate Change, Extreme Weather, and Electric System Reliability”. The final rules become effective September 21, 2023, and September 25, 2023, respectively.

Order No. 896 states in part:

[W]e direct the North American Electric Reliability Corporation to develop a new or modified Reliability Standard that requires the following: development of benchmark planning cases based on prior extreme heat and cold weather events and/or future meteorological projections; planning for extreme heat and cold events using steady state and transient stability analyses that cover a range of extreme weather scenarios, including the expected resource mix's availability during extreme weather conditions and the broad area impacts of extreme weather; and corrective action plans that include mitigation activities for specified instances where performance requirements during extreme heat and cold events are not met.

Order No. 897 states in part:

[T]he Commission requires transmission providers to file a one-time informational report on whether, and if so how, they establish a scope, develop inputs, identify vulnerabilities and exposure to extreme weather hazards, and estimate the costs of impacts in their extreme weather vulnerability assessments, as well as how they use the results of those assessments to develop risk mitigation measures.

See Order No. 896 here:

See Order No. 897 here:


bottom of page