This is an excerpt from EERE Network News, a weekly electronic newsletter.
DOE Funds Superconductor Transmission Cable Project on Long Island
DOE recently selected American Superconductor Corporation to install a half-mile of high temperature superconductor (HTS) cable in the Long Island Power Authority (LIPA) power grid. Expected to be operating by the end of 2005, the cable will be the first installation of superconductor cable in an actual power grid at transmission voltages. The 2,000-foot cable will be installed underground in East Garden City and will carry 600 megawatts of power at 138,000 volts. Nexans will manufacture the cable from HTS wire supplied by American Superconductor, and Air Liquide will provide refrigeration equipment and oversee operation of the cryogenic cooling system for the cable. DOE will cover roughly half the cost of the $30 million project.
HTS cables can carry three to five times the power that conventional cables of the same size can carry, so they hold the potential to increase the capacity of our nation's electrical transmission system. See the American Superconductor press release.