Market Renewal – Single Schedule Market

Created to align pricing and dispatch, the move from the IESO’s current two-schedule market to a single schedule market (SSM) will introduce locational energy prices – which reflect the true costs of producing and consuming electricity at a given time – for suppliers and for consumers who participate in the energy market. The SSM will achieve important efficiencies, dramatically reducing the need for out-of-market payments and enabling the IESO to implement other important initiatives, including the day-ahead market. Learn more about our collaborative approach to developing this foundational element of the market renewal program, and the resulting decisions that will guide implementation: visit the Single Schedule Market High-Level Design webpage.

Background

Ontario’s use of the two schedule system is unique in North American energy markets. Ontario uses an unconstrained schedule to set price and a constrained schedule to establish dispatch. The unconstrained schedule delivers a uniform price of electricity across the province but does not fully reflect actual conditions (like transmission limitations) on the power grid. The constrained schedule used for dispatch must fully account for system conditions in order to deliver a reliable supply of power to Ontarians.

The two schedule system results in two key challenges for Ontario. First, when price and dispatch aren’t aligned, decisions that make financial sense to market participants may not provide the greatest benefit to the system. By moving to a single schedule, this misalignment can be resolved.

Second, the two schedule system results in a complex series of out of market payments to resolve differences between price and dispatch. This complexity has prevented other market improvements, like a day-ahead market, from being implemented in the past. Moving to a single schedule system will reduce complexity and facilitate further market enhancements.  

Get Involved

As Market Renewal will introduce substantial enhancements to Ontario’s electricity marketplace, this project will be of interest to market participants and other stakeholders. Interested parties are invited to participate in, and provide feedback on, any of the Market Renewal initiatives.

For more information about how to become involved or to provide comments on the project, please contact engagement@ieso.ca.

Stakeholder Engagement Plan

Single Schedule Market Fact Sheets

Schedule of Activities

Date
Agenda
Minutes

Activities

Expected Actions

November 22, 2018

Engagement Plan: Detailed Design, MRP Energy stream

 

November 22, 2018

Deadline for feedback on SSM HLD

 

November 2, 2018

Single Schedule Market HLD - Q&A Session

 

 October 18, 2018

Market Renewal Education and Awareness Sessions for targeted audiences

 

 October 18, 2018

 

Stakeholder feedback on materials and issues discussed at the September 20th meeting

 

September 27, 2018

Release of draft SSM High Level Design

 

September 20, 2018

Agenda

 

 

 Stakeholder Meeting                               

August 16, 2018

 

Stakeholder Feedback on materials and issues discussed at the July 18th and 19th meetings

IESO Response to Stakeholder Feedback

 

August 13, 2018

 

Stakeholder Feedback on materials and issues discussed at the July 18th and 19th meetings

IESO Response to Stakeholder Feedback

 

July 18-19, 2018

Agenda

Minutes

Stakeholder Meeting

 

June 21, 2018

Stakeholder feedback on materials and issues discussed at the May 23rd and 24th meetings

IESO Response to Stakeholder Feedback

 

June 7, 2018

Webinar Invitation: MRP Energy Workstream - Intertie Transactions - Stakeholder Discussion

Stakeholder Feedback

 

May 23-24, 2018

Agenda

Minutes

Stakeholder Meeting

          

April 27, 2018

Stakeholder feedback on materials and issues discussed at March 29 meeting

IESO Response to Stakeholder Feedback

 

March 29, 2018

SSM Minutes

MPMI Minutes

Stakeholder Meeting

 

February 27, 2018

Stakeholder feedback on materials and issues discussed at January 30th meeting

IESO Response to Stakeholder Feedback

 

January 30, 2018

Agenda

Meeting Summary

Stakeholder Meeting

January 19, 2018

Stakeholder feedback on materials presented at December 11th meeting

IESO Response to Stakeholder Feedback

 

December 15, 2017

Stakeholder feedback on materials posted at November 13 meeting

 

December 11, 2017

Agenda

Stakeholder Meeting

Phase II - Options and Preliminary Decisions

November 13, 2017

Agenda

Stakeholder Meeting

Phase II - Options and Preliminary Decisions

           

 

October 26, 2017

Stakeholder Meeting cancelled

 

September 21, 2017

Agenda

Minutes 

Stakeholder Meeting - Phase II - Options and Preliminary Decisions 

Stakeholder Feedback

 

September 13, 2017

Stakeholder Feedback

IESO Response to Stakeholder Feedback

 

August 17, 2017

Agenda

Minutes

Stakeholder Meeting

 

July 27, 2017

Agenda

Minutes

Stakeholder Meeting

Recorded Presentation

June 29, 2017

Agenda

Minutes

Stakeholder Meeting – Design Elements Education Session

Recorded Presentation

June 2, 2017

Agenda

Minutes

Stakeholder Meeting Design Elements Education Session

Single Schedule Market Pricing Issues

Recorded Presentation 

May 4, 2017

Agenda

Minutes 

Stakeholder Meeting Intro to Engagement, Overview of Design Elements and Scope

Stakeholder Feedback

IESO Response to Feedback            

Materials posted one week in advance of meeting

April 20, 2017

Communication