Regulation Service RFP (RS RFP)

Ontario’s electricity system is evolving, with increasing electricity demand, the electrification of industrial loads and public transit and higher amounts of renewable generation in service across the province. These factors are contributing to greater variability in traditional electricity consumption and generation patterns and a greater need for regulation service, a critical ancillary service the IESO uses to balance this variability across the system. The IESO’s Annual Planning Outlook (APO) forecasts a growing need for additional regulation service over the next several years to support the reliable operation of the power system.

To secure these forecasted needs, the IESO is introducing the Regulation Service Request for Proposals (RS RFP) to competitively procure additional regulation service from eligible generation and storage resources capable of meeting the IESO’s technical and operational requirements.

Regulation Service Updates

For further information about upcoming engagement sessions, please visit the IESO’s Regulation Service Stakeholder Engagement web page.

Any general enquiries regarding the RS RFP can be sent to RS.RFP@ieso.ca.

Stakeholder Engagement
Learn more about the engagement plan, objectives, approach, timeline and considerations for engaging stakeholders

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Archived Documents

2017 Regulation RFP

In 2016, the IESO determined the need for an additional 50 MW of regulation service. This 50 MW was incremental to the 100 MW of regulation service that the IESO typically schedules every hour.

The 2017 RFP for Incremental Regulation Capacity was aimed at obtaining incremental regulation capacity from all manner of technologies, including those that are existing and currently registered in the IESO-administered markets and those that had the ability to register in the IESO-administered markets at a later date.

Through the Regulation RFP process, the IESO offered two contracts, representing ±55 MW of regulation capacity across two new energy storage facilities in Ontario. Unfortunately, neither facility achieved commercial operation and both contracts were terminated. In the intervening time, changes to Ontario’s supply mix have reduced the need for additional regulation service capacity.

2017 Regulation RFP Documents

Webinars