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June 11, 2025

IESO

Ontario’s Independent Electricity System Operator is a government organization with a mixture of commercial and public-policy goals, owned by the government of Ontario. It was created to prepare for deregulation of the province’s electrical system and is governed by a board whose directors are appointed by the provincial government.
Power Advisory
Operating Reserve Prices Surge in Ontario

The opening of Ontario’s nodal market has been marked by real-time volatility and unusually high operating reserve prices.

Canadian Biogas Association
IESO Sticking with Local Generation Program Design

IESO politely said “no” to many of the stakeholder-requested changes to the design of its proposed Local Generation Program, but noted it will include the raised concerns in its report to the Ontario government in July and signaled it was open to further discussing others before then.

IESO
Ontario Nodal Market Operating as Expected at 1-month Mark

Ontario’s nodal market is showing promise one month after its launch, with improved price certainty, increased day-ahead trading and LMPs reflecting expected congestion patterns, IESO officials say.

Canadian Biogas Association
Suppliers Call for Changes to IESO Local Generation Proposal

Electricity cooperatives, independent power producers and biogas generators have asked IESO to reconsider key components of its proposed Local Generation Program.

GE Hitachi Nuclear Energy
Counterflow: The SMR Fission Vision in Ontario
Experience with small modular reactors (like other nuclear) is for massive cost overruns, writes columnist Steve Huntoon.
OPG
Ontario Greenlights OPG to Build Small Modular Reactor
Site preparation is underway in southern Ontario for what is expected to be the first small modular reactor to come online in North America, a 300-MW unit projected to cost $7.7 billion CAD.
Yes Energy
IESO Opens Day-ahead Market in Nodal Rollout
IESO continued a smooth rollout of Ontario's nodal market, launching a financially binding day-ahead market.
IESO
Around the Corner: Nobody Does Capacity Quite Like Ontario
The move was a big step for IESO, and one of the biggest tweaks to its market design in years.
Yes Energy
IESO Nodal Market Launch Successful
Ontario's IESO successfully launched its nodal market on May 1, reporting few glitches during its rollout.
IESO
IESO Tweaks Modeling for Outage Management

IESO is changing how it projects renewable generation output and its accounting for imports and planned loads in the forecasts it uses to manage generator and transmission outages.


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