Guiding Documents for the Transition to the Renewed Market

This page is for historical purposes only. The documents below are the final versions of the Energy Stream Detailed Design and High-Level Design prepared for market participants to help guide the transition to the Renewed Market on May 1, 2025.

Energy Stream Detailed Design
Document Description

Overview

Provides a guide to understanding the different components of the detailed design documents. The overview identifies where content can be found and how the documents are connected.

Authorization and Participation

Describes the process and requirements for prospective market participants to become authorized to participate in the IESO-administered markets.

Prudential Security

Describes the prudential support that is required to be authorized as a market participant, as well as the processes for daily monitoring of collateral.

Facility Registration

Describes the requirements for registering facilities and associated resources for IESO-administered markets.

Revenue Meter Registration

Describes the requirements for registering a revenue meter installation and collecting revenue meter data.

Offers, Bids and Data Inputs

            

Describes the data inputs from market participants and the IESO that are required to produce schedules, commitments, dispatch instructions and prices.

Grid and Market Operations Integration

            

Describes how the processes to schedule, commit and dispatch resources are integrated to administer the energy and operating reserve markets, and to ensure system adequacy and reliability.

Day-Ahead Market Calculation Engine

                       

Describes the core functions of the calculation engine to operate the energy market and operating reserve market in the day-ahead timeframe.

Pre-Dispatch Calculation Engine

 

Describes the core functions of the calculation engine to operate the energy market and operating reserve market in the pre-dispatch timeframe.

Real-Time Calculation Engine

                       

Describes the core functions of the calculation engine to operate the energy market and operating reserve market in the real-time timeframe.

Market Power Mitigation

            

Describes the details of the market power mitigation framework that will apply in the day-ahead, pre-dispatch and real-time operating timeframes.

Publishing and Reporting Market Information

 

Describes the IESO’s responsibilities to produce automated internal and external reports used to facilitate the IESO-administered markets and the reliable operation of the IESO-controlled grid.

Market Settlement

              

Describes how the IESO will calculate market participant settlement amounts.

Market Billing and Funds Administration

Describes the processes for invoicing market participants, receiving and distributing funds and reconciling settlement.

 

Energy Stream High-Level Designs

Single Schedule Market High-Level Design

The Single Schedule Market (SSM) High-Level Design addresses the legacy markets' misalignment between price and dispatch, with a move to locational pricing, which reflects the true cost of producing and consuming electricity at a given location. The SSM also dramatically reduces the need for out-of-market payments, paving the way for other cost-savings initiatives, including the day-ahead market.

Day-Ahead Market High-Level Design

With the Day-Ahead Market (DAM) High-Level Design, participants submit day-ahead bids and offers to compete with others for a day-ahead price supporting more open competition among market participants and providing greater financial and operational certainty, which lowers the cost of producing electricity and ensures the IESO commits only the resources required to meet system needs.

Enhanced Real-Time Unit Commitment High-Level Design

The Enhanced Real-Time Unit Commitment High-Level Design helps ensure when changes in system needs arise in the pre-dispatch timeframe, the most cost-effective set of resources will be available to meet demand in real-time.