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June 24, 2024

ambient-adjusted ratings (AARs)

NYPA
NYISO Asks FERC for an Extension to Comply with Order 881
NYISO requested a three-year extension to comply with FERC Order 881, saying it needs more time to implement software and hardware updates needed to support ambient-adjusted ratings on transmission lines.
NYSERDA
NYISO Management Committee Briefs: Nov. 29, 2023
NYISO stakeholders gave final approval to rules for "internal controllable lines" and revisions to day-ahead market congestion settlement procedures.
NYISO
NYISO Stakeholders Advance Rules on Ambient Ratings, Internal Controllable Lines
NYISO members approved new rules for ambient line ratings and HVDC lines.
PPL
Grid-enhancing Technologies Poised for Growth with Federal Funds
Grid-enhancing technologies have been piloted in many places, but with recent FERC orders and federal funding, they are poised to become much more common.
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SPP Markets and Operations Policy Committee Briefs: July 10-11, 2023

SPP stakeholders endorsed a tariff revision request that adds a winter resource adequacy requirement for load-responsible entities bound by the grid operator’s recent planning reserve margin increase.

MISO
Order 881 Timelines Need Explaining, FERC Says
FERC issued orders directing transmission providers to clarify their timelines for calculating and submitting ambient-adjusted line ratings under Order 881.
NYPA
FERC Approves Batch of Line Ratings Compliance Filings
FERC approved the compliance filings of six transmission providers, including those of NYISO and CAISO, with Order 88.
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MISO, Members Debate Deploying AARs
MISO, its Monitor and members debated the best course to implementing ambient adjusted line ratings during a Sept. 15 Advisory Committee discussion.
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Christie Talks up Flexibility of Transmission NOPR
FERC Commissioner Mark Christie said the agency's transmission NOPR gives the states plenty of flexibility to plan their public policy-focused projects.
EIA
FERC Denies Rehearing, Clarifies Order 881 on Line Ratings
FERC denied rehearing requests from transmission providers and others on Order 881.

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