Extreme Weather Reliability and Compliance

Extreme weather event preparedness and response remains a top priority for the North American Electric Reliability Corporation (NERC) and Texas RE. Accordingly, the current Compliance Monitoring and Enforcement Program Implementation Plan (CMEP IP) highlights Reliability Standard EOP-011-4 in emergency operations. This standard directly addresses systemic grid vulnerabilities to extreme cold weather and will be closely monitored and enforced through NERC’s compliance program. The Standard passed on February 15, 2024, and was created in response to 2021 Winter Storm Uri, which caused the largest controlled firm load shed in U.S. history.

Updates to Reliability Standard EOP-011-4 build on the previous “emergency operations” by introducing stricter requirements and expanding the scope of applicable entities. Notably, this version explicitly integrates automatic load shedding—including Underfrequency Load Shed (UFLS) and Undervoltage Load Shed (UVLS)—into emergency planning considerations. Entities required to comply now include Distribution Providers, UFLS-only Distribution Providers, and Transmission Owners.

Under Requirement R1, Part 1.2.5.5, Transmission Operators shall consider the impacts of load shedding on critical natural gas infrastructure loads, which are essential for the reliability of the Bulk Electric System (BES). This requirement aims to ensure that these critical loads are excluded from demand response and emergency load shedding programs during extreme cold weather conditions, where natural gas supply issues for generation have proven to be a challenge. Additionally, Requirement R2 mandates that Balancing Authorities develop Operating Plans that incorporate these protections, ensuring these specific loads are not used for interruptible or curtailable demand during emergencies. Under Requirement R7, Transmission Operators must annually identify and notify Distribution Providers, UFLS-only Distribution Providers, and Transmission Owners required to assist with emergency load shedding.

Entities can comply by developing, maintaining, and implementing a Reliability Coordinator-reviewed Operating Plan(s) that outline clear roles, responsibilities, and procedures for mitigating operating emergencies. Best practices include risk assessments for extreme weather and critical infrastructure, proactive maintenance, and coordination with internal teams and external stakeholders. Thorough documentation, including review histories, operator logs, and communication records, supports transparency and compliance. Internal controls, such as monitoring, quality assurance, and training programs, ensure that procedures are consistently followed, risks are mitigated, and the BES operates securely and efficiently during emergencies.

As the frequency and intensity of extreme weather events continue to increase, maintaining compliance with EOP-011-4 is no longer just a requirement—it is a fundamental operational safeguard. The integration of risk assessments, maintenance strategies, and stakeholder coordination ensures that critical infrastructure is safeguarded against both predictable and unforeseen disruptions. Ultimately, the Standard reinforces a culture of preparedness, accountability, and continuous improvement, enabling entities to maintain uninterrupted service, protect vital assets, and uphold public trust in the electric grid.