Title :
Resistive fault current limiters with HTSC-measurements and simulation
Author :
Lindmayer, M. ; Schubert, M.
Author_Institution :
Inst. fuer Elektrische Energieanlagen, Tech. Univ. Braunschweig, Germany
fDate :
3/1/1993 12:00:00 AM
Abstract :
The results reported concern polycrystalline Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub x/ and Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub x/ bulk material. The transition between superconducting and normal-conducting state of YBCO and BSCCO high-T/sub C/ superconductors (HTSCs) was investigated experimentally. By using these results, simulations of the behavior of HTSC current limiters in electrical power networks were carried out. Assuming a homogeneous conductor, the self-quenching initialized by exceeding the critical current is calculated for conductors with different critical current densities. Questions of inhomogeneity along the conductor, current pulse triggering, and transient overvoltages are discussed.<>
Keywords :
critical currents; current limiting reactors; high-temperature superconductors; overcurrent protection; power system protection; superconducting devices; Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub x/; Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub x/; critical current; current pulse triggering; electrical power networks; high temperature superconductor; high-T/sub C/ superconductors; inhomogeneity; polycrystalline bulk material; resistive fault current limiters; self-quenching; superconducting transition; transient overvoltages; Bismuth compounds; Conducting materials; Conductors; Critical current; Current limiters; Fault current limiters; Strontium; Superconducting materials; Superconductivity; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
