IESO Reliability Outlook: Ontario Electricity System Prepared for Summer
June 29, 2023
Ontario’s electricity system is prepared for summer, with adequate supply expected to be available to meet electricity demand and maintain backup supply.
The IESO is prepared for tighter grid conditions that could develop if the province experiences extreme heatwaves – this is similar to last year and is the new norm for Ontario and many jurisdictions around North America. Peak demand is forecast to be 22,446 MW under normal weather conditions, and 24,446 MW under extreme weather. Last year’s peak was 22,607 MW.
Ontario has a diverse supply mix and a variety of tools available to maintain the reliability of the grid. This includes managing planned generator and transmission maintenance schedules, imports from our neighbours and consumer demand response.
Large consumers participating in the Industrial Conservation Initiative are expected to reduce provincial demand by roughly six per cent. In addition, more than 900 MW of consumer demand response secured in the most recent capacity auction can also contribute.
The IESO’s latest quarterly Reliability Outlook is now available: Summer Reliability Outlook.