Technical Reference Materials

API Technical Specifications for Dispatch Services and MIM

As part of the Market Renewal Program (MRP), changes are being made to the way Market Participants will interact with the Market Information Management and the Dispatch Services systems. These applications are currently used by dispatchable Market Participants to submit bids and offers for the physical market and to receive dispatch instructions from the IESO. To prepare Market Participants, the IESO has provided an updated set of API technical specifications, schema and sample files in the section below. Further details on the updated materials are noted in the Participant Readiness Memo..

Market Information Management System

Dispatch Service System

IESO Reports Impacted by MRP

The changes to come from the Market Renewal Program (MRP) will introduce new reports and update existing reports to reflect the renewed market. These changes will apply to both public and confidential reports. The complete list of market facing reports impacted by MRP can be downloaded and includes target timing for posting schema and sample files. To assist market participants in preparing for these changes, the IESO is publishing the schema, sample and help files for the new and revised IESO reports. Market participants are recommended to verify that they can view and download these reports, and confirm that the structural changes in these files can be accepted by their internal processes and systems before MRP Go-Live. The table below provides a list of schema, sample, and help files so far that market participants can view and download for market facing reports. Please note that the timing for posting schema, sample, and help files for market facing reports are subject to change.

  • Complete list of market facing reports impacted by MRP (updated as of July 25, 2024)
  • Document_r1.xsd - Document_r1.xsd is a schema file that is created to validate the header content for all IESO reports such as Document revision number and document title. Please ensure that Document_r1.xsd is included with all IESO reports along with the report’s specific schema and sample files.

Quick Take: Changes to Reports Site

The purpose of the Quick Take: Changes to Reports Site is to inform stakeholders on the changes to the folder structure of the IESO Reports Site as a result of reports being introduced, updated, or decommissioned by MRP.

Reason for Update

As of June 28, 2024, the complete list of market facing reports impacted by MRP has been updated. The following changes were made:

  • During the June 2023 MRP engagement webinar, the IESO communicated to stakeholders that the Weekly Market Summary Report will not be revised under MRP as the information will be published through the ieso.ca data pages. Based on reporting frequency and a need for historical reports to be accessible to market participants, it has now been determined for this report to be revised in its current format instead of making the information available through the website. The schema, sample, and help files for this report was made available below in Q4 2024.
  • The Hourly Uplift and Intertie Guarantee Estimates Report was identified for “no change” in detail design. The report will be revised to align with the new data and settlements equations which the MRP is introducing.  The schema, sample, and help files for this report will likely be available in Q4 2024.
  • Some of the report names have changed names to be consistent with references in other documents.

Report Group

Target Posting

Market Power Mitigation

Q4 2023

Day-Ahead Market Scheduling and Operating Reserve

 

Pre-Dispatch Scheduling and Operating Reserve

Q1/Q2 2024

Real-Time Scheduling and Operating Reserve


Adequacy

Q2 2024

Market Inputs

Q2 2024

Supply

No schema changes, only timing changes

Demand

Q2 2024

Prudential

Q2 2024

Transmission (Tx) Constraints

No schema changes, only timing changes

Transmission Rights

Q2 2024

Day-Ahead Market Pricing

 

Pre-Dispatch Pricing

Q4 2023/Q1 2024

Real-Time Pricing

 

Settlement

Q2 2024

Summary

Q4 2024