Discover Hydro-Québec TransÉnergie and its system
Our System at a Glance

Our system

Hydro-Québec TransÉnergie is a leader in transmission system design, operation and maintenance. It operates the most extensive transmission system in North America, with more than 33,000 km of lines at different voltages. The division's fixed assets in Québec total $16 billion.

Voltage Substation (number) Lines (km) 765 kV and 735 kV 38 11,422 ±450 kV DC 2 1,218 315 kV 63 5,127 230 kV 50 3,048 161 kV 41 2,013 120 kV 214 6,624 69 kV or less 103 3,606 Total 510 33,058 December 31, 2008

Our interconnections

To offer customers a reliable system and transmission services tailored to their needs, Hydro-Québec TransÉnergie has 15 interconnections with systems in neighboring provinces and states, providing a total export capacity of more than 6,700 MW and import capacity of more than 9,700 MW. These facilities allow us to carry out interchanges with Newfoundland and Labrador, New Brunswick, Ontario and the U.S. Northeast.

Neighboring system Import mode (MW) Export mode (MW) Churchill 5,150 0 New Brunswick 770 1,100 Ontario 720 1,295 New England 1,970 2,275 New York 1,100 2,125 December 31, 2008