The IESO regularly publishes an 18-Month Outlook, which presents the IESO's assessment of the reliability of the Ontario electricity system over the short term. This quarterly publication assesses whether the existing and proposed generation and transmission facilities are adequate to meet Ontario's needs.
18-Month Outlook: Spring 2016
The IESO issues its 18-Month Outlook each quarter. Here is the most recent issue and related documents.
18-Month Outlook: An Assessment of the Reliability and Operability of the Ontario Electricity System from April 2016 to September 2017 (Released March 22, 2016)
- 18-Month Outlook Interim Update: in Microsoft Excel Spreadsheet format (Released May 5, 2016)
18-Month Outlook - Tables from the current Outlook in Microsoft Excel spreadsheet format (Released March 22, 2016)
Ontario Demand Forecast issued semi-annually, this document provides more detail about the 18-month forecast of electricity demand for Ontario. (Released December 14, 2015)
Ontario Transmission System provides specific details on the transmission system, including the major internal transmission interfaces and interconnections with neighbouring jurisdictions. (Released December 14, 2015)
Methodology to Perform Long Term Assessments contains information regarding the methodology used to perform the demand forecast, resource adequacy assessments, and transmission adequacy assessments in this Outlook report. (Released March 22, 2016)
Submitting of Reliability Assessment Information
Market participants are required to provide information to the IESO to enable it to conduct reliability assessments. These submissions are required each calendar year.
Previous 18-Month Outlooks and Reliability Reports
Ontario Reserve Margin Requirements
The Ontario Reserve Margin Requirements reports on the operational planning reserve requirements to meet the NPCC resource adequacy design criterion over a five-year window.
Notice: The posting of submissions on the IESO's Web site is done for the convenience of market participants and other interested visitors to the IESO's site. When requesting or receiving submissions from market participants and/or industry stakeholders, it is the normal practice of the IESO to post the submissions on the IESO Web site. The IESO reserves the right to revise or withdraw any such submission at any time without further notice should the submission include, in the IESO's opinion, any defamatory or other inappropriate provisions. Participants are reminded that all the material that they submit may be published and that, in making a submission, their permission to publish the material is deemed to be granted.