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The other major interconnection is the Western Interconnection. The three minor interconnections are the Quebec , Alaska , and Texas interconnections. All of the electric utilities in the Eastern Interconnection are electrically tied together during normal system conditions and operate at a synchronized frequency at an average of 60 Hz.
The Eastern Interconnection and the Western Interconnection are the largest. Three other regions include the Texas Interconnection , the Quebec Interconnection , and the Alaska Interconnection . Each region delivers power at a nominal 60 Hz frequency.
The Western Interconnection is a wide area synchronous grid and one of the two major alternating current (AC) power grids in the North American power transmission grid. The other major wide area synchronous grid is the Eastern Interconnection .
The Tres Amigas SuperStation (lit. ' Three Friends SuperStation ') was a project proposed in 2009 to unite North America’s two major power grids (the Eastern Interconnection and the Western Interconnection) and one of its three minor grids (the Texas Interconnection), with the goals of enabling faster adoption of renewable energy and increasing the reliability of the U.S. grid. [1] [2]
The two major interconnections are the Eastern Interconnection and the Western Interconnection. The Texas Interconnection is maintained as a separate grid for political, rather than technical reasons, [ 1 ] but can draw some power from other grids using direct current DC ties .
Besides this there are two minor power grids in the U.S., the Alaska Interconnection and the Texas Interconnection. The Eastern, Western and Texas Interconnections are tied together at various points with DC interconnects allowing electrical power to be transmitted throughout the contiguous U.S., parts of Canada and parts of Mexico.
Eastern Interconnection consists of 31 balancing authorities in the US and 5 in Canada; Western Interconnection consists of 34 balancing authorities in the US, 2 in Canada, and 1 in Mexico; Electric Reliability Council of Texas includes a single balancing authority; Quebec Interconnection also with a single authority.
A wide area synchronous grid (also called an "interconnection" in North America) is a three-phase electric power grid that has regional scale or greater that operates at a synchronized utility frequency and is electrically tied together during normal system conditions.