High temperature superconducting (HTS) cables for use in electric ac power
systems are under development around the world today. There are two main co
nstructions under development: the room temperature dielectric design and t
he cryogenic dielectric design. However, theoretical studies have shown tha
t the insertion of these cables in the network is not without problems. The
network stability requirements may impose severe constraints on the actual
obtainable length of superconducting cables. Load flow considerations show
that it may be difficult to use these high current cables to their full ex
tent. Short circuits in the network may require a special protection system
.