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Critical infrastructure protection

Interconnections and Regional Entities[edit]

The electrical grids of the contiguous United States consists of 190,000 kilometres (120,000 mi) of lines operated by 500 companies.

Interconnections[edit]

  • The Eastern Interconnection covers most of eastern North America, extending from the foot of the Rocky Mountains to the Atlantic seaboard, excluding most of Texas. The Eastern Interconnection is tied to the Western Interconnection via high voltage DC transmission facilities and also has ties to non-NERC systems in northern Canada.
  • The Western Interconnection covers most of western North America, from the Rocky Mountains to the Pacific coast. It is tied to the Eastern Interconnection at six points, and also has ties to non-NERC systems in northern Canada and Northwestern Mexico.
  • The Texas Interconnection covers most of the state of Texas. It is tied to the Eastern Interconnection at two points, and also has ties to non-NERC systems in Mexico.
  • The Quebec Interconnection covers the province of Quebec and is tied to the Eastern Interconnection at two points. About one third of Canada’s installed power (42 GW out of 130) and about one third of Canada’s production (184 TWh out of 567) are in this interconnection. Despite being a functionally separate interconnection, the Quebec Interconnection is often considered to be part of the Eastern Interconnection.