Superconducting transformers

The technological progress of power frequency AC superconductors is remarkable and application studies are being carried out, targeting AC superconducting (SC) machines for power systems. The introduction of SC machines into the power system needs to display the merits of not only efficiency improvement, but also power system performance and operation. A conceptual design for a coreless superconducting transformer (SCT) is made, based on the above views and its merits evaluated. A future possible power system employing coreless SCTs is presented, and consideration is given to the actual service in a future power system.