"
HVDC lines are cheaper to build and require less land area than equivalent AC lines. About 500 miles of
HVDC lines operate in the U.S. today and have proved efficient. No major advance seems to be needed...
TransCanada, Inc. is proposing 2,200 miles of
HVDC lines to carry wind energy from Montana and
Wyoming south to
Las Vegas and beyond" (Scientific American, Jan. 2008).
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