Operability Assessment



The IESO’s 2019 Operability Assessment evaluates the IESO’s ability to effectively and reliably operate the IESO-controlled grid (ICG) under multiple scenarios based on expected changes to the ICG by year 2025.

The assessment projects how real-time operations will be impacted by the changing technologies and resources within Ontario’s power system (both transmission- and distribution-connected). It also identifies and recommends changes to the ICG design or market mechanisms, processes and/or tools to address any operability concerns.

Previous Operability Assessments

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

2016 IESO Operability Assessment - Summary 
Review of the Operability of the IESO-Controlled Grid to 2020