Green Line

Project

Green Line is a high voltage direct current (HVDC) electric transmission system that will transfer 800 to 1000 megawatts (MW) of electric energy from Aroostook County, Maine to greater Boston, Massachusetts. The full route is via a combination of a terrestrial transmission line in Maine and submarine cable across the Gulf of Maine to Massachusetts. Converter stations at each end of a +/-320 kV direct current (DC) transmission line converts alternating current (AC), like that used in the typical household, to direct current (DC). DC is the most efficient way to move electricity long distances. HVDC systems provide great flexibility and near instantaneous control over how much and in which direction power flows, thus proving many reliability benefits to the larger electric grid.

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Industry News

China has begun construction on the world’s largest capacity transmission line. The 800kV high voltage direct current line began on May 13, 2012.  The HVDC line is 1,400 miles long and will carry up to 8,000 megawatts of power.  (Read more…)

Benefits

Green Line will strengthen the transmission grid in New England and help provide greater access to competitively priced non-carbon emitting resources in Maine and eastern Canada. Read more…

Media Coverage

Maine’s Portland Press Herald reports on May 13, 2012 that Central Maine Power’s $1.4 billion transmission upgrade will not provide benefits needed by alternative energy projects in northern and eastern Maine. Read more….



New England Independent Transmission Company, LLC | 401 Edgewater Place, Suite 640, Wakefield, MA 01880 | 781-246-9851