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December 5, 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.
Experts: New Ontario Capacity Market Can Learn from US
Ontario’s nascent capacity market could take advantage of lessons from the U.S., experts said during APPrO's annual conference.
MISO Records Mild Winter
The tamest winter in recent memory brought no emergencies for MISO, though the RTO’s South region was the subject of three weather-related alerts.
NYISO Stakeholders OK Moving IESO Proxy Bus
NYISO is moving the proxy bus for pricing transactions with Ontario’s IESO to reflect power-flow changes from the implementation of phase-angle regulators.
NPCC Workshop Examines DER Reliability Issues
NPCC's Regional Standards Committee held a forum on reliability issues related to DERs, featuring presentations by Hydro-Quebec, Duke and IESO.
ERO Budget Nears OK Despite Canada’s Concerns
NERC’s 13.3% spending increase to develop its cybersecurity capability is facing some pushback from multiple Canadian utilities.
Overheard at 2019 IESO Electricity Summit
Facing the same challenges as its U.S. counterparts, Ontario’s IESO is reshaping its markets to handle an influx of renewable and distributed resources.

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