Ancillary Services

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Patton Calls on ERCOT to Operate its System Less Conservatively
ERCOT can ensure long-term reliability with its energy-only market, but it must operate its grid less conservatively for that to happen, said Potomac Economics President David Patton.
ERCOT
Large Loads Slow to Interconnect in ERCOT
ERCOT's Technical Advisory Committee discussed the grid operator's approach to large loads, as staff said they are tracking over 200 GW in large-load interconnection requests.
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PJM MIC Briefs: Oct. 9, 2025
The PJM Market Implementation Committee endorsed a package of revisions to Manual 18.
MISO
MISO Mulling New Way to Convey Spate of Advisories in South
MISO is contemplating a better way to communicate generation shortfalls in its Southern load pockets than continuing to send out repeat capacity advisories. 
ISO-NE
ISO-NE Publishes Draft 2026 Work Plan
Capacity auction reforms, a new asset condition reviewer role, parallel transmission planning efforts, new reserve products, Pay-for-Performance changes and interconnection modifications are likely to be on the docket for ISO-NE in 2026.
Mid-America Carpenters Regional Council
D.C. Circuit Vacates FERC Cancellation of Reactive Power Compensation in MISO
The D.C. Circuit Court of Appeals vacated a FERC order allowing MISO to end reactive power compensation, though the decision has no bearing on the nationwide discontinuation of payments for reactive power in Order 904.
ERCOT
ERCOT Board Approves AS Procurement for 2026
ERCOT’s Board of Directors approved staff’s recommended methodologies for acquiring minimum ancillary service requirements in 2026, despite concerns over conservative operations and target procurement levels.
Potomac Economics
NYISO Monitor Report Highlights Generator Outages During Heat Wave
As NYISO continues its Capacity Market Structure Review, the Market Monitoring Unit used its second-quarter State of the Market report to highlight potential issues with how the ISO forecasts resource availability.
Western Maine Energy Storage
Renewables Creating Opportunities for Pumped Hydro in New England
A developer in Maine is evaluating whether pumped storage – one of the oldest generation technologies still used on the New England grid – could play an increased role in the grid of the future.
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ERCOT Stakeholders Endorse 2026 AS Methodology
ERCOT stakeholders, while raising concerns over the grid operator’s use of conservative operations, have endorsed staff’s recommendations for computing minimum ancillary service quantities for 2026.

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