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December 5, 2025

Independent Electricity System Operator (IESO)

The Independent Electricity System Operator is responsible for operating the electricity market and directing the operation of the bulk electrical system in Ontario.
NPCC Sees Lower Summer Peak for 2019
The Northeast Power Coordinating Council is projecting a summer peak demand of 103,548 MW in the week of July 28, 2019 a 0.6% reduction from last year.
© RTO Insider
Stressed in US, Capacity Markets Come to Ontario, Alberta
Ontario and Alberta are developing capacity markets as those in the U.S. face stress from subsidized resources and growing resistance from states and public power.
MISO Seeks To-Do List for Resource Adequacy Panel
MISO staff asked the Resource Adequacy Subcommittee (RASC) for feedback on the group’s priorities for 2018 and how the RTO could import capacity from IESO.
MISO
MISO: Tx Link from Ontario to Mich. UP not Cost Effective
MISO has concluded there’s little economic benefit to new transmission connecting Michigan’s Upper Peninsula to Ontario based on the results of a study.
© RTO Insider
Overheard at Infocast’s Texas Renewable Energy Summit
Infocast Texas Renewable Energy Summit attendees heard discussions on the challenges ERCOT faces in building transmission and ensuring grid reliability.
Michigan Asks MISO to Study Tx Links to Ontario
Michigan is asking for another assessment from MISO, this time to study grid transmission improvements across the state’s peninsulas and Canada.
Ontario: Clean — and Expensive
As in New England, electricity prices in Ontario are relatively high, and that has prompted frequent interventions from government.
Ontario Grid Looks Like the Past — and the Future — of the US
About 650 industry participants gathered in Ontario for the APPrO's 27th Annual Canadian Power Conference & Networking Centre.
Bowring, Gates’ Consultant Spar over PJM Traders’ Obligations on Loopholes
PJM Market Monitor Joe Bowring had a lively debate with one of the consultants for Powhatan Energy over the “duty” of market participants to self-police against market manipulation.
Monitor Gives Lukewarm Review to PJM ‘Sham Scheduling’ Fix
PJM’s plan to change the definition of the IMO interface with the Ontario IESO received a lukewarm review from Monitor Joe Bowring, who said it would not correct what he has called “sham scheduling.”

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