Market Renewal – Single Schedule Market

The IESO is working with stakeholders to design and develop a single schedule market (SSM) to replace the existing two schedule system. This initiative is a key foundational element of the IESO’s Market Renewal program.

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 address the fundamental design issues of 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 (Draft)

 

Schedule of Activities

Date
Agenda
Minutes

Activities

Expected Actions

Monthly to end of Q1 2018

PHASE III – Design Decisions

 

December 11, 2017

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 (Draft)

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