Gas-Insulated High Temperature Superconducting Coaxial Dipole for MVDC Power Systems

The concept of gas-insulated high temperature superconducting (HTS) coaxial dipole for power distribution systems in medium voltage direct current (MVDC) architectures is explored. Finite element analysis of electromagnetic characteristics of the preliminary designs of the HTS coaxial dipole show promise in terms of its ability to eliminate electromagnetic interference with other devices by eliminating the magnetic field leakage external to the dipole. The coaxial dipole allows effective cancelation of self-magnetic field of the individual poles carrying several kA current thus allowing higher current carrying capacity of the cable. Design options for arranging the HTS conductors and insulator spacers is presented. Outstanding challenges to realize practical coaxial dipole configurations of HTS power distribution systems are discussed.