 Single Schedule Market Engagement

Documents referenced on this page, but not posted, can be obtained by contacting engagement@ieso.ca with a link to the web page that lists the document and advise whether it needs to be provided in an accessible format. Please allow a minimum of one business day for a response.

Update August 21, 2019: The Single Schedule Market high-level design engagement has completed. Please visit the energy detailed design engagement to learn about current engagement opportunities.

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 Energy Stream High-Level Designs 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.

Single Schedule Market High-Level Design (final full document August 2019)

Executive Summary (final August 2019)

Revisions to the energy stream high-level design documents (August 2019)

Single Schedule Market High-Level Design (draft full document September 2018)

Executive Summary (draft 2018)

Backgrounder

Issues & Actions Log

SSM Design Tracker

Schedule of Activities

Date Agenda Minutes	Activities	Expected Actions
August 8, 2019	IESO Response to Stakeholder Feedback – Single Schedule Market IESO Response to Stakeholder Feedback – General themes on the energy stream
December 15, 2018	Stakeholder Feedback Ontario Power Generation Ontario Waterpower Association
November 22, 2018	Deadline for feedback on SSM HLD Communication SSM HLD Feedback form Stakeholder Feedback Alectra AMPCO APPrO Atlantic Packaging Products BluEarth Capital Power Cascades Consortium of Renewable Generators, Energy Storage Providers and Industry Associations Common Voice Northwest Energy Task Force Electricity Distributors Association Energy Storage Canada HQ Energy Marketing Hydro Ottawa ITC Holdings Market Surveillance Panel NextEra Energy Canada Northland Power Ontario Energy Association Ontario Power Generation Peak Power Energy Praxair Shell Toronto Hydro Vale
November 2, 2018	Single Schedule Market HLD - Q&A Session Communication
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 AMPCO Market Surveillance Panel Ontario Power Generation IESO Response to Stakeholder Feedback
September 27, 2018	Release of draft SSM High Level Design SSM HLD Feedback form
September 20, 2018 Agenda Minutes	Stakeholder Meeting Communication Presentation Congestion Rents and Loss Residual Zonal Disbursement Methodology Intertie Congestion Pricing Review of Market Power Mitigation Decisions and Guidelines Introduction to the High Level Design Review Process Day Ahead Market Detailed Design Phase
August 16, 2018	Stakeholder Feedback on materials and issues discussed at the July 18th and 19th meetings Nalcor Energy Ontario Power Generation Workbench IESO Response to Stakeholder Feedback
August 13, 2018	Stakeholder Feedback on materials and issues discussed at the July 18th and 19th meetings AMPCO Hydro Quebec Energy Marketing - 1 Hydro Quebec Energy Marketing - 2 MAG Energy Solutions IESO Response to Stakeholder Feedback
July 18-19, 2018 Agenda Minutes	Stakeholder Meeting Communication Presentation Market Power Mitigation Design Considerations Settlement Topics
June 21, 2018	Stakeholder feedback on materials and issues discussed at the May 23rd and 24th meetings ADG Group AMPCO APPrO – ERUC APPrO – MPM Consortium of Renewable Generators and Storage Providers DER AC HQ Energy Marketing MAG Energy - DAM MAG Energy – ERUC MAG Energy - SSM Ontario Power Generation IESO Response to Stakeholder Feedback
June 7, 2018	Webinar Invitation: MRP Energy Workstream - Intertie Transactions - Stakeholder Discussion Communication Stakeholder Feedback HQ Energy Marketing MAG Energy Ontario Power Generation
May 23-24, 2018 Agenda Minutes	Stakeholder Meeting Intertie Transactions Presentation Market Power Mitigation Design Considerations Two Settlement and Make-Whole Design Scenarios
April 27, 2018	Stakeholder feedback on materials and issues discussed at March 29 meeting APPrO Capital Power Ontario Power Generation IESO Response to Stakeholder Feedback
March 29, 2018 SSM Minutes MPMI Minutes	Stakeholder Meeting Presentation Market Power Mitigation Design Considerations
February 27, 2018	Stakeholder feedback on materials and issues discussed at January 30th meeting Market Surveillance Panel Nalcor Energy Ontario Power Generation IESO Response to Stakeholder Feedback
January 30, 2018 Agenda Meeting Summary	Stakeholder Meeting Communication Presentation SSM Design Element Options - Load Pricing
January 19, 2018	Stakeholder feedback on materials presented at December 11th meeting APPrO Brookfield Renewable Hydro Quebec Energy Marketing MAG Energy Solutions Nalcor Energy Ontario Power Generation TransAlta IESO Response to Stakeholder Feedback
December 15, 2017	Stakeholder feedback on materials posted at November 13 meeting AMPCO
December 11, 2017 Agenda	Stakeholder Meeting Phase II - Options and Preliminary Decisions SSM Design Element Options SSM Price Formation Options
November 13, 2017 Agenda	Stakeholder Meeting Phase II - Options and Preliminary Decisions SSM Design Element Options SSM Design Elements - Preliminary Decisions Market Power Mitigation and Load Pricing
October 26, 2017	Stakeholder Meeting cancelled
September 21, 2017 Agenda Minutes	Stakeholder Meeting - Phase II - Options and Preliminary Decisions Price Formation Options Design Element Options Stakeholder Feedback APPrO
September 13, 2017	Stakeholder Feedback AMPCO APPrO Bruce Power Hydro Quebec Energy Marketing IESO Response to Stakeholder Feedback
August 17, 2017 Agenda Minutes	Stakeholder Meeting Communication Presentation SSM Load Pricing - Options SSM Market Power Mitigation - Options
July 27, 2017 Agenda Minutes	Stakeholder Meeting Phase 2: Introduction Module H: Make Whole Payments and Uplift Phase 2: Price Formation	Recorded Presentation
June 29, 2017 Agenda Minutes	Stakeholder Meeting – Design Elements Education Session IESO Response to Feedback Presentation: Design Element Fundamentals Module F: Load Pricing Module G: Market Power Mitigation Module G: Market Power Mitigation Appendix Module H: Make Whole Payments and Uplift	Recorded Presentation
June 2, 2017 Agenda Minutes	Stakeholder Meeting – Design Elements Education Session Presentation Single Schedule Market Pricing Issues Introduction Module A: Energy Pricing Module B: Reserve Pricing Module C: Pricing Constraint Violations Module D: Multi-Interval Optimization and Pricing Module E: Pricing Operating Restrictions and Operator Actions	Recorded Presentation
May 4, 2017 Agenda Minutes	Stakeholder Meeting – Intro to Engagement, Overview of Design Elements and Scope Presentation Single Schedule Market Pricing Issues Phase I Discussion Stakeholder Feedback ITC Holdings Corp. IESO Response to Feedback	Materials posted one week in advance of meeting
April 20, 2017	Communication

Stakeholder Engagements

Single Schedule Market Engagement

Schedule of Activities