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Hydro-Québec TransÉnergie
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The Long and Short of Our Power Transmission System

Our power 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 32,000 km of lines. 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 5127
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
Link : Consult our map of the system

Our interconnections

To offer customers a reliable system and transmission services tailored to their needs, Hydro-Québec TransÉnergie has many interconnections, most of them with systems in neighboring provinces and states, providing a total export capacity of more than 7,100 MW and an import capacity of more than 9,575 MW. These facilities allow 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, 2005
Link: Consult our interconnections map

Hydro-Québec's Home Page Link: HQ TransÉnergie Home Page