Ancillary Services

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.
PJM
PJM Operating Committee Briefs: Dec. 4, 2025
PJM’s forecasting of hourly peak loads continued to improve in November, with an error rate of just 1.17%, staff told the RTO’s Operating Committee.
© RTO Insider LLC
ERCOT Successfully Deploys Real-time Co-optimization
ERCOT says it has successfully deployed Real-time Co-optimization + Batteries into the market, a mechanism used in most other RTOs and ISOs that procures energy and ancillary services in real time.
CAISO
CAISO Ponders DER Market Participation in New Paper
A new CAISO paper lays out a series of challenges around how to improve participation of demand response and distributed energy resources in the ISO's day-ahead and real-time markets.
ERCOT
ERCOT Stakeholders Endorse $9.4B 765-kV Build
ERCOT stakeholders endorsed a 1,109-mile, single-circuit 765-kV backbone project that is projected to cost nearly $9.4 billion in capital costs, making it the largest initiative in decades.
AdminMonitor
Texas PUC Hints at Revisiting ERCOT Conservative Operations
Texas regulators approved ERCOT’s methodologies for determining minimum ancillary services for 2026 while hinting at the same time that they are considering discontinuing the use of conservative operations.
IESO
IESO Implementing ‘True-up’ on Renewed Market Rules
After more than six months of operations under its Market Renewal Program, IESO is implementing “non-substantive” rule changes it says will improve clarity and alignment.
© RTO Insider LLC
NYISO Meeting Briefs: Nov. 3-4, 2025
NYISO presented the results of Phase 1 of the 2024 Cluster Study process at a special Operating Committee meeting.
Nvidia
Nvidia, Emerald AI, EPRI and PJM Announce Flexible Data Center Project
The artificial intelligence industry and power industry are working together to develop the first “power-flexible AI factory” at a 96-MW facility in Manassas, Va.
MISO
MISO Predicts 103-GW Peak for Winter
MISO said even a 109-GW peak this winter shouldn’t prove problematic, though a more probable scenario would deliver a 103-GW peak in January.

Want more? Advanced Search