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May 14, 2024

ambient-adjusted ratings (AARs)

FERC Opens Inquiry on Dynamic Line Ratings
FERC opened a docket on the costs and benefits of dynamic line ratings, an initiative it signaled in its December order banning static line ratings.
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MISO Begins Dynamic Line Ratings Work
MISO foresees a relatively easy shift to incorporate transmission owners’ dynamic line ratings, though it said it will settle on a weather forecasting method.
FERC Orders End to Static Transmission Line Ratings
FERC ordered transmission providers to end the use of static line ratings in evaluating near-term service, saying it will increase utilization of the grid.
MISO Preps for Dynamic Line Ratings
MISO has developed a rough idea of how it might manage dynamic transmission line ratings should FERC begin to require them. 
FERC Proposes Requiring Variable Tx Line Ratings
FERC issued a proposal to require all transmission providers to implement seasonal and ambient-adjusted ratings on their lines.
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MISO Concurs with Most 2020 Monitor Recommendations
MISO agrees with nearly all the new recommendations its Monitor issued this year, though executing the ideas may take some time.
FERC Staff Explore Barriers to Grid-enhancing Tech
Representatives from utilities, RTOs and technology vendors gathered at FERC headquarters for a workshop to discuss the role of grid-enhancing technologies.
FERC, NERC Reviewing Comments on CIP Disclosures
FERC and NERC are reviewing the more than 70 comments filed in response to their proposal on disclosure of CIP violations to determine their next steps.
Counterflow: Waste Not, Want Not
Steve Huntoon argues that requiring transmission owners to use dynamic and ambient-adjusted line ratings is a no-brainer to get the most out of the grid.
FERC Considering Tx Line Rating Rules
FERC staff held a technical conference to receive input on dynamic and ambient-adjusted line ratings, including whether they should be required.

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