Regulation Service RFP

Through this Request for Proposals (RFP), the IESO is seeking to procure incremental regulation capacity that will give the IESO the ability to schedule an additional 50 MW of regulation service.

2017 RFP for Incremental Regulation Capacity

The IESO has determined the need for an additional 50 MW of regulation service, which is incremental to the 100 MW of regulation service that the IESO typically schedules every hour. This RFP is aimed at obtaining incremental regulation capacity from all manner of technologies. Facilities eligible to participate in this RFP include those that are existing and currently registered in the IESO-administered markets and those that have the ability to register in the IESO-administered markets at a later date.

The IESO is seeking to expand the breadth of the regulation service market in Ontario and has the goal to expand its capability to schedule regulation. This will be achieved by increasing the scheduled regulation capacity from 100 MW to a range between 150 MW to 200 MW for each hour, and developing sufficient market depth to schedule between 250 MW to 300 MW of regulation capacity on an as-needed basis by 2020.

Regulation Service RFP Updates

This section will be updated on an ongoing basis with relevant events and timelines for the Regulation Service RFP. Interested parties are encouraged to check back regularly for any changes to timelines or procurement updates.

September 13, 2017 Final Addenda Posted

The IESO has posted an Addendum to each of the Regulation RFP and the Contract, in accordance with section 2.11 of the Regulation RFP. In addition to the Addenda, blackline versions of the RFP and Contract, an addendum summary document, an update to the FAQ document and an update to the Round 2 Question and Comment responses are now available below.

The third and final round of the Question and Comment Period is currently open. Questions must be submitted by September 15, 2017 for the IESO to post responses on September 22, 2017. All inquiries pertaining to the Regulation RFP must be emailed to No other form of communication regarding the Regulation RFP will be accepted by the IESO prior to the Proposal Submission Deadline.

The Proposal Submission Deadline is September 28, 2017 at 3:00 p.m., Toronto time. Other important dates are listed below and can be found in Section 2.4 of the Regulation Service RFP.

Details Date
Release of final RFP and final Contract June 29, 2017
IESO's deadline for issuing Addenda to final RFP and final Contract September 13, 2017
Proponents' deadline for submitting questions and comments September 15, 2017
Proposal submission deadline 3:00 p.m. on September 28, 2017 (the "Proposal Submission Deadline")
Notification to all Proponents and announcement of selected Proposals November 2017 (target date)

Interested parties are encouraged to subscribe to the Regulation Service RFP email distribution list at

All inquiries pertaining to the procurement must be emailed to No other form of communication regarding the Regulation Service RFP will be accepted by the IESO.

Question and Comment Period

This section outlines the timelines related to the Question and Comment Period described in Section 2.9 of the Regulation RFP. The IESO will post its responses to questions and comments on the website in batches based on the following schedule:

  1. Round 1 - Wednesday, August 9, 2017 (for questions received by Friday, July 28, 2017)
  2. Round 2 - Updated Wednesday, September 13, 2017 (for questions received by Friday, August 25, 2017)
  3. Round 3 - Friday, September 22, 2017 (for questions received by Friday, September 15, 2017)

This schedule is subject to change based on the volume and nature of questions.

RFP Resources

The following section provides interested parties with the procurement materials. Draft versions of procurement documents are denoted as such, as are any addenda.

The following Prescribed Forms are attached as appendices to the RFP.

Additional program resources are available to assist interested parties in preparing their Proposals and further understand the procurement process.

Regulation Data, Related Market Rules and Manuals

In the lead-up to the September 2016 regulation RFI, the IESO posted a sample of its regulation signal data. This data will assist potential new entrants into the regulation market to assess, test, and simulate various scenarios with an actual sample of the IESO's regulation signal data. The regulation sample data files provide interested parties with an opportunity to analyze various characteristics of the regulation signal such as upward/downward bias, volatility, correlations with other datasets, etc. The data can also be mathematically scaled to fit the range of a prospective facility for testing and evaluation purposes. As of July 22, 2016, a complete calendar year of sample data is now available in across two sample files as follows:

Download: Signal sample: Concatenated Sample for the period from June 24, 2015 to December 31, 2015 (13MB)

Download: Signal sample: Concatenated Sample for the period from January 1, 2016 to June 30, 2016 (14 MB)

Download: Descriptor of the sample data, revised July 22, 2016

IESO Market Rules governing regulation service

The following sections of the IESO Market Rules contain requirements concerning regulation service:

  • Chapter 4, Appendices 4.2, 4.8, 4.15 and 4.19
  • Chapter 5, Sections 4.4, 4.9, 4.10; Section 12; and Appendix 5.1, Section 1.1
  • Chapter 7, Section 9

Technical description of the regulation signal

Past Activities

Date Activities Details
June 29, 2017 Final Regulation Service RFP materials posted Details
View the documents (.zip)
June 8, 2017 Regulation Service RFP Webinar View Presentation in PDF
View Recorded Presentation
June 1, 2017 Draft Regulation Service RFP View the documents (.zip)
April 25, 2017 Regulation 101 Webinar held View Presentation in PDF
View Recorded Presentation
December 16, 2016 Draft Regulation RFP posted for comment View the document
September 30, 2016 Request for Information (RFI) posted View the document


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