NEPOOL Markets Committee

Fletcher, CC BY-SA 4.0, via Wikimedia Commons
ISO-NE Details Proposals to Cut Costs of Day-ahead Ancillary Services
ISO-NE detailed proposed changes to its day-ahead ancillary services market to address higher-than-expected costs.
ISO-NE
ISO-NE Starts Work on Day-ahead Ancillary Services Market Changes
With costs associated with ISO-NE’s new day-ahead ancillary services market far exceeding expectations, the RTO is working to fast-track changes to improve the efficiency of the market in time for next winter.
JERA
ISO-NE Details Inputs for Capacity Auction Reform Impact Analysis
ISO-NE outlined its methodology for analyzing potential effects of its capacity auction reform project, detailing inputs for the near- and longer-term base cases and potential factors to be considered in sensitivity analyses.
ISO-NE
Costs of ISO-NE Day-ahead Ancillary Services Higher than Expected
ISO-NE’s new day-ahead ancillary services market added about $258 million in incremental costs between March and August, equal to 7.6% of total energy market costs.
Analysis Group
ISO-NE Introduces Approach to Modeling Gas Constraints
ISO-NE outlined its planned approach for accounting for resources’ gas supply limitations in its new capacity accreditation framework at a NEPOOL Markets Committee meeting.
ISO-NE
NEPOOL Committees Support ISO-NE Prompt Capacity Auctions
NEPOOL technical committees voted in favor of ISO-NE’s proposal to adopt a prompt capacity auction and update the RTO’s resource retirement process.
ISO-NE
NEPOOL Members Offer Amendments on ISO-NE Capacity Reform Project
NEPOOL members proposed several amendments to the first phase of ISO-NE’s capacity market overhaul prior to the scheduled Markets Committee vote on ISO-NE’s proposal in November.
Calpine
ISO-NE Kicks off Talks on Accreditation, Seasonal Capacity Changes
ISO-NE kicked off NEPOOL discussions for the second phase of its capacity auction reform project, beginning long-awaited talks on accreditation and seasonal capacity auction changes.
ISO-NE
NEPOOL Markets Committee Briefs: July 8-9, 2025

ISO-NE provided updates on its proposals for generator retirements, market power mitigation, and resource qualification and reactivation.

Shutterstock
ISO-NE Internal Market Monitor Weighs in on Capacity Market Changes

The Internal Market Monitor weighed in on ISO-NE's proposed capacity market overhaul, expressing support for increased flexibility around resource retirement notifications and recommending the elimination of the pivotal supplier test.


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