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ROSSLYN, VA--The technology exists to improve the United States' national transmission grid, but there are few incentives for transmission owners to make changes, says the National Electrical Manufacturers Association (NEMA) in a recent issue of its web publication, electroindustry.
NEMA cites these examples of current technologies that might improve the transmission grid:
Better insulators that allow an increase in transmission line voltage (to 765kV) and the addition of multiple conductors per phase that significantly increase line capacity.
New advanced conductors, such as aluminum-conductor, steel-supported trapezoidal wire technologies, which can increase power carrying capacity by 30% to 100%.
High-voltage direct current transmission (already in place in some areas of the Northwest, Southwest, and Northeast) can nearly double transmission capacity and improve system stability.
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