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SUPPLY OVERVIEW

Ontario has a diverse supply mix that is in the process of incorporating increasing amounts of renewable forms of energy.  Here’s an overview of Ontario’s generation fleet:

Installed Capacity: There is 36,013 MW of installed generation in Ontario's electricity market. The amount of generation actually available at any one time is dependent on outages and the capacity factor of certain forms of supply.  

  • Supply Mix*:  Ontario’s installed generation capacity includes:

Nuclear Nuclear: 12,947 MW or 37.0%
Gas Gas: 9,920 MW or 28.4%
Coal Coal: 2,291 MW or 6.6%
Hydro Hydro: 7,939 MW or 22.7%
Wind Wind: 1,725 MW or 4.9%
Biomass Other (wood waste, biogas, etc): 124 MW or 0.4%

*Generating resources as of October 23, 2013. Updated biannually. Note that these figures do not include generators that operate within local distribution service areas, except for those that participate in the IESO-administered market.

  • Generator Output: The IESO posts hourly output and capability for each generating unit over 20 MW that is connected to the transmission grid.  This report includes how much each unit is capable of producing and how much it actually produces each hour. 

  • Wind Output: The IESO also provides a windtracker which displays hourly output from Ontario’s wind generators.  This tool can be embedded in external web sites.

  • Imports and Exports:  Ontario imports and exports electricity from neighbouring jurisdictions on a continual basis. The IESO publishes hourly import and export information on the media desk homepage.  Annual totals are listed below.

New and Retired Generation Since the IESO Market Opened in May 2002

Ontario’s electricity sector is going through a process of renewal – with the replacement of aging infrastructure and the transition to a more sustainable energy supply mix. Here’s an overview of new or refurbished generation projects of 20 MW or more that have been commissioned onto the system since 2002.  This table also includes coal units that have been retired as part of the government’s plan to phase out coal by the end of 2014.

  2003

 

Nuclear

Pickering Unit 4

515 MW

 
 

Nuclear

Bruce Unit 4

770 MW

 

  2004

 

Nuclear

Bruce Unit 3

782 MW

 
 

Gas

Brighton Beach

580 MW

 
 

Gas

Kirkland Lake

32 MW

 
 

Hydro

Beck and Kipling (Upgrades)

80 MW

 

  2005

 

Nuclear

Pickering Unit 1

515 MW

 
 

Coal

Lakeview (Retirement)

-1,130 MW

 

  2006

 

Gas

Greater Toronto Airport Authority

117 MW

 
 

Wind

Amaranth

68 MW

 
 

Wind

Kingsbridge

40 MW

 
 

Wind

Port Burwell

99 MW

 
 

Wind

Prince Wind Project

99 MW

 
 

Wind

Prince II Wind Project

90 MW

 

  2007

 

Hydro

Abitibi Canyon (Upgrades)

20 MW

 
 

Wind

Ripley

76 MW

 

  2008

 

Gas

Portlands Energy Centre (Simple Cycle)

394 MW

 
 

Gas

Greenfield Energy Centre

1,153 MW

 
 

Hydro

Umbata Falls

24 MW

 
 

Wind

Kruger Energy Port Alma (T1) Wind Project

101 MW

 
 

Wind

Melancthon II

132 MW

 

  2009

 

Gas

St. Clair Energy Centre

678 MW

 
 

Gas

Portlands Energy Centre (Combined Cycle)

246 MW

 
 

Gas

Goreway Station

942 MW

 
 

Hydro

Beck Unit 7 conversion

69 MW

 
 

Hydro

Beck 2 upgrades

68 MW

 
 

Wind

Enbridge Ontario Wind Farm

182 MW

 
  Wind

Wolfe Island Wind Project

198 MW

 
 

Gas

East Windsor Cogeneration

100 MW

 

  2010

 

Gas

Thorold Cogeneration

287 MW

 
 

Gas

Halton Hills Generating Station

705 MW

 
 

Coal

Nanticoke and Lambton unit shutdowns

-2,000 MW

 
 

Biomass

Conversion of Fort Frances to biomass

47 MW

 
 

Wind

Kruger Energy Chatham (T3) Wind Project

101 MW

 

  2011

 

Wind

Gosfield Wind Project

50 MW

 
 

Wind

Spence Wind Farm

99 MW

 
 

Wind

Talbot Wind Farm

99 MW

 
 

Coal

Nanticoke Units 1 and 2 shutdown

-980 MW

 

  2012

 

Wind

Greenwich Wind Farm

99 MW

 
  Coal

Atikokan unit shutdown

-211 MW

 
  Nuclear

Bruce Units 1 and 2

1,552 MW

 
  Nuclear

York Energy Centre

438 MW

 

  2013

 

Wind

Pointe Aux Roches Wind Farm

49 MW

 
 

Wind

Comber Wind Farm

166 MW

 

 

Imports and Exports

Ontario is capable of importing or exporting approximately 4,800 MW at any one time, depending on system conditions. Ontario's high-voltage transmission grid is connected to Manitoba, Quebec, New York, Michigan and Minnesota.

Year Imports (TWh) Exports (TWh) Net Imports (TWh)
2013 4.9 18.3 -13.4
2012 4.7 14.6 -9.9
2011 3.9 12.9 -9.0
2010 6.4 15.2 -8.8
2009 4.8 15.1 -10.3
2008 11.3 22.2 -10.9
2007 7.2 12.3 -5.1
2006 6.2 11.4 -5.2
2005 11.0 10.2 0.8
2004 9.8 9.5 0.3
2003 10.4 6.3 4.1
2002 7.1 3.9 3.2
2001 4.3 4.1 0.2
2000 5.1 5.5 -0.4
1999 6 4 2
1998 6 3 3
1997 3.8 6.4 -2.6

RELATED INFORMATION


Generation by Fuel Type - 2012


Where to Find More Information About Supply

  • The Ontario Reliability Outlook reports on projects underway to meet Ontario's future electricity needs.
  • The Quarterly Power Outlook provides a summary of demand forecasts and generation availability over the next three months.
  • More detailed 18-Month and 10-Year Outlooks are available on the Forecasts page in the "Inside the Market" section.
  • Information on available generation, imports and exports are available from the Market Summaries page of the "Inside the Market" section.