Transmission - Three times the efficiency Next-generation power lines that are lighter and can transmit far more electricity will likely play a role in modernizing the nation's power grid. The new transmission lines, made of 3M Nextel 610 ceramic fibers embedded in an aluminum matrix, are undergoing extensive testing at the National Transmission Technology Research Center in Oak Ridge. Results are encouraging. "3M's new conductor can increase current-carrying capacity by three fold for the same size cable at minimal cost and environmental impact," said John Stovall, a researcher in ORNL's Engineering Science and Technology Division. And, since October 2002, Western Area Power in Fargo, N.D., has had a mile-long section of the conductor installed in its grid. In addition to its greater efficiency, the new material makes lines far less susceptible to sagging, which happens under heavy load and can lead to massive power outages. The National Transmission Technology Research Center is a joint effort of ORNL, 3M and the Tennessee Valley Authority. The center has been in operation for about a year.
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