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 32,000 km of lines at different voltages. The division's fixed assets in Québec total $15.9 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 2,976 161 kV 40 1,877 120 kV 213 6,600 69 kV or less 102 3,606 Total 508 32,826 December 31, 2006

Our interconnections

To offer customers a reliable system and transmission services tailored to their needs, Hydro-Québec TransÉnergie has 18 interconnections, most of them with systems in neighboring provinces and states, providing a total export capacity of more than 7,100 MW and import capacity of more than 9,575 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) Newfoundland and Labrador 5,200 0 New Brunswick 785 1,200 Ontario 720 1,295 New England 1,870 2,305 New York 1,000 2,125 December 31, 2006