Definition
A Transmission Line Rating defined in Attachment M that applies to a specified season (at least four per year) and reflects a forecast of ambient temperature across that season, updated annually or more frequently. Transmission Providers must use Seasonal Line Ratings for non-near-term service evaluations (beyond 10 days), for Network Resource designations and changes, and as a recourse rating when an Ambient-Adjusted Rating is unavailable. Seasonal ratings replaced the prior practice of using fixed, conservative static ratings that often understated true line capacity.
Topic Deck
Grid Operations
Source
FERC Pro Forma OATT / LGIP
Explore more
All games · Transmission Planner · Docket Defender · Energy Persona quiz