Hydro-Québec - Activities - Transmission System

Transmission System

Hydro-Québec's expertise at building and operating a very high voltage electrical grid spreading over long distances has long been recognized in the electrical industry. TransÉnergie, Hydro-Québec's transmission division, operates the largest electricity transmission network in North America. It acts as the independent system operator and reliability coordinator for the Québec interconnection of the North American Electric Reliability Corporation system, and is part of the Northeast Power Coordinating Council (NPCC). TransÉnergie manages the flow of energy on the Quebec network and ensures non-discriminatory access to all participants involved in the wholesale market. The non-discriminatory access policy allows a company such as Nalcor to sell some of its share of power from Churchill Falls on the open market in the State of New York using TransÉnergie's network, upon payment of a transmission fee.

In recent years, TransÉnergie's Contrôle des mouvements d'énergie (CMÉ) unit has been acting as the reliability coordinator of the bulk electricity network for Quebec as a whole, under a bilateral agreement between the Régie de l'énergie du Québec and the Federal Energy Regulatory Commission of the United States.

TransÉnergie's high voltage network stretches over 33,630 km (20,900 mi), including 11,422 km (7,097 mi) of 765 and 735 kV lines, and a network of 514 substations. It is connected to neighboring Canadian provinces and the United States by 17 ties, with a maximum reception capacity of 10,850 MW and a maximum transmission capacity of 7,994 MW.

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