Stakeholders Endorse Order 881 Manual Revisions

The PJM Operating Committee endorsed a set of manual revisions to implement ambient-adjusted line ratings (AARs) in compliance with FERC Order 881. (See “Manual Language to Implement AARs Endorsed,” PJM OC Briefs: Jan. 8, 2026.)

The changes to Manual 3: Transmission Operations, and Manual 3A: Energy Management System Model Updates and Quality Assurance, will create a system where temperature-adjusted line ratings are produced 248 hours out, including a buffer of eight hours to ensure compliance with Order 881. Monthly ratings also will be produced, which PJM’s Ryan Nice noted goes beyond the order’s seasonal requirement.

The changes are set to take effect March 4. Nice said any transmission owners with concerns about being prepared for the launch date should reach out to him.

Grid Security Drill

PJM’s Ed Figuli announced plans to hold the annual grid security drill Nov. 17, with invitations planned to go out in March. The drill focuses on cyber and physical security and is open to state and government agencies, in addition to PJM members.