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.

NYISO stakeholders gave final approval to rules for "internal controllable lines" and revisions to day-ahead market congestion settlement procedures.

NYISO members approved new rules for ambient line ratings and HVDC lines.

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.

FERC issued orders directing transmission providers to clarify their timelines for calculating and submitting ambient-adjusted line ratings under Order 881.

FERC approved the compliance filings of six transmission providers, including those of NYISO and CAISO, with Order 88.

MISO, its Monitor and members debated the best course to implementing ambient adjusted line ratings during a Sept. 15 Advisory Committee discussion.

FERC Commissioner Mark Christie said the agency's transmission NOPR gives the states plenty of flexibility to plan their public policy-focused projects.

FERC denied rehearing requests from transmission providers and others on Order 881.