Improving Accessibility of Operating Reserve

Operating Reserve (OR) is stand-by power or demand reduction that the IESO can call on with short notice to deal with an unexpected mismatch between electricity generation and consumption. The IESO schedules OR for every minute of every day to meet requirements set by the North American Electric Reliability Corporation (NERC) and the Northeast Power Coordinating Council (NPCC) to ensure power system reliability.  The IESO has been experiencing an issue with OR where the amount of scheduled OR is not fully accessible. This issue could create challenges for the IESO to recover the supply-demand balance after a system event, and result in unfair cost to the market. In order to better understand and develop potential solutions to this issue, the IESO will be initiating an engagement to discuss this with stakeholders.


Additional details on the IESO’s plans to engage stakeholders throughout the process can be found in the engagement plan. All comments and enquiries on this engagement can be directed to

Schedule of Activities

Timing Engagement Activity

August 20, 2020

Improving Accessibility of Operating Reserve Stakeholder Engagement Update

April 30, 2020

Stakeholder feedback due on the detailed design of the OR settlement claw-back mechanism

IESO response to stakeholder feedback

March 30, 2020

Stakeholder webinar

Recorded Presentation

February 10, 2020

January 10, 2020

Stakeholder feedback from participants on the details of the recommended solution presented during Dec 10th webinar

December 10, 2019

Webinar/meeting to address any outstanding stakeholder feedback or concerns and finalize the solution

August 15, 2019         

Formal feedback period on solutions proposed by the IESO.

IESO response to feedback received

July 31, 2019

Webinar/meeting to address feedback from stakeholders and to propose potential solutions to address the issue.

April 11 – 25, 2019

Formal feedback period to gather initial feedback from stakeholders on underlying causes of the issue.

Stakeholder Feedback

April 10, 2019

Webinar to kick-off engagement

  • Discuss the issue with stakeholders and solicit initial feedback on the proposed engagement approach.
  • Presentation

 March 28, 2019


 Engagement launched