Resistive fault current limiters with HTSC-measurements and simulation

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.<
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