Long Island Power Authority (LIPA) and American Superconductor Corp have commenced operation of the world’s first high temperature superconductor (HTS) power transmission cable system in a commercial power grid. The 138 kV system, which consists of three individual HTS power cable phases running in parallel, was energised on April 2 and is operating successfully in LIPA’s Holbrook transmission right of way. The cable system, including six outdoor terminations for connection to LIPA’s grid,