Market Renewal - Enabling System Flexibility

The IESO, along with market stakeholders, is examining the emerging need to schedule resources capable of responding within a short timeframe in order to manage forecast uncertainty in the real-time energy market. Because of the nature of this work, this initiative is now operating as part of the Market Renewal program.

Background

In every timeframe that the IESO operates, decisions are made to ensure the reliable and efficient balancing of supply and demand. These decisions depend on high quality inputs, including dispatch data (offers and bids), demand forecast, schedules from self-scheduled generators and forecast of the output of variable generators (wind and solar).

Experience has shown that the output from variable generators is less predictable than that of other generators. While the IESO uses a centralized forecast provider for the output of variable generators over a number of timeframes, no forecast is always perfect.

In Ontario, the difference between forecast and actual values are larger a day-ahead, 5-hours ahead and 1-hour ahead than they are within the hour before real-time dispatch. Although these differences are smaller within the dispatch hour they can still be material. The real-time energy market dispatches other resources to resolve over/under-forecasts when they occur. However, if market operations are not expected to be able to provide sufficient flexibility to manage differences between actual and forecast output, it is sometimes necessary for the IESO to take out-of-market control actions to ensure the reliable operation of the system. This can be unnecessarily expensive.

With more variable generation expected, the associated increase in the differences between actual and forecast output of variable generators will further challenge the IESO’s ability to operate the system efficiently. There is a need to explore how to effectively ensure flexibility in managing supply and demand. 

Get Involved

The IESO encourages all stakeholders with an interest in this initiative to participate.

For more information about how to become involved or to provide comments on this or any other Market Renewal initiative, please contact engagement@ieso.ca.

Engagement Plan (Draft)


Schedule of Activities

Date
Agenda
Minutes

Activities

Expected Actions

October 23, 2017

Agenda

Next Meeting

 

August 22, 2017

Deadline for stakeholders to submit feedback on materials and issues discussed at August 1st meeting

Stakeholder Feedback

 

August 1, 2017

Meeting Notes

Stakeholder Meeting

 

February 17, 2017

Deadline for stakeholders to submit feedback on materials and issues discussed at January 27th meeting

Stakeholder Feedback

 

January 27, 2017

Meeting Notes

 Next Webinar

 

December 8, 2016

Enabling System Flexibility Stakeholder Engagement Update

 
Past Activities

August 31, 2016

Deadline for stakeholders to submit feedback on materials and issues discussed at August 16th meeting

Stakeholder Feedback

IESO Response to Stakeholder Feedback

 

August 16, 2016

Agenda

Meeting Notes (Draft)

Stakeholder Meeting

 

July - September, 2016

Stakeholder Meetings 2 and 3 Identification and exploration of potential options for flexibility

Materials posted one week in advance of meeting

July 8, 2016

Deadline for stakeholders to submit feedback on materials and issues discussed at first meeting and feedback on SE Plan

Stakeholder Feedback

Feedback will be posted on IESO stakeholder webpage (with permission)

June 24, 2016

Agenda

Meeting Notes (Draft)

Stakeholder Meeting - Overview of engagement and discussion of flexibility need

Materials posted one week in advance of meeting

June 9, 2016

Post Stakeholder Engagement Plan and Communication