Regulation service is an ancillary service that the IESO contracts to help ensure the reliable operation of the power system. Regulation provides frequency support through minute-to-minute balancing to ensure electricity supply matches demand and is currently provided by generation facilities with automatic generation control capability.
Each year, the IESO conducts an assessment to determine if there are incremental regulation needs within the province over the next 10 years. In the 2025 Annual Planning Outlook Report, the IESO noted that to maintain sufficient balance between supply and demand over the next decade, incremental regulation of 30 MW is required beginning as early as 2026 and is anticipated to grow to 110 MW in 2035.
The IESO continues to pursue opportunities to acquire additional regulation needs in the near term and in the future. The purpose of this engagement is to discuss the IESO’s plans to procure additional Regulation capacity and gather feedback from stakeholders and communities on next steps.
The IESO will present the need for additional Regulation Service capacity along with the IESO’s plans to procure this additional Regulation capacity, technical requirements, and invite feedback on next steps.
