Fault Current Limiting Characteristics of Separated and Integrated Three-Phase Flux-Lock Type SFCLs

The fault current limiting characteristics of the separated and the integrated three-phase flux-lock type superconducting fault current limiters (SFCLs) were analyzed. The three-phase flux- lock type SFCL consisted of three flux-lock reactors and three high-TC superconducting (HTSC) elements. In the integrated three-phase flux-lock type SFCL, three flux-lock reactors are connected on the same iron core. On the other hand, three flux-lock reactors of the separated three-phase flux-lock type SFCL are connected on three separated iron cores. The integrated three-phase flux-lock type SFCL showed the different fault current limiting characteristics from the separated three-phase flux- lock type SFCL that the fault phase could affect the sound phase, which resulted in quench of the HTSC element in the sound phase. Through the computer simulation applying numerical analysis for its three-phase equivalent circuit, the fault current limiting characteristics of the separated and the integrated three-phase flux-lock type SFCLs according to the ground fault types were compared.

[1]  T. Uchii,et al.  Development of flux-lock-type fault current limiter with high-T/sub c/ superconducting element , 1997, IEEE Transactions on Applied Superconductivity.

[2]  S. Fukui,et al.  Performance of DC reactor type fault current limiter using high temperature superconducting coil , 1999, IEEE Transactions on Applied Superconductivity.

[3]  Hong Soon Choi,et al.  The fault current limiting characteristics of a flux-lock type high-T , 2004 .

[4]  Liangzhen Lin,et al.  Application studies of superconducting fault current limiters in electric power systems , 2002 .

[5]  Wolfgang Schmidt,et al.  Resistive fault current limiters with YBCO films 100 kVA functional model , 1999, IEEE Transactions on Applied Superconductivity.

[6]  T. L. Mann,et al.  Opportunities for superconductivity in the electric power industry , 1997, IEEE Transactions on Applied Superconductivity.

[7]  Sung-Hun Lim,et al.  Fault current limiting characteristics due to winding direction between coil 1 and coil 2 in a flux-lock type SFCL , 2004 .

[8]  Sung-Hun Lim,et al.  Analysis of operational characteristics of flux-lock type SFCL combined with power compensator , 2005 .

[9]  Koo-Hyung Chung,et al.  An Analysis on Price Limits of Imported Power via Northeast Asian Power System Ties , 2007 .

[10]  H. Kado,et al.  Performance of a high-Tc superconducting fault current limiter-design of a 6.6 kV magnetic shielding type superconducting fault current limiter , 1997, IEEE Transactions on Applied Superconductivity.

[11]  Hyun-Kyo Jung,et al.  Analysis of an Electromagnetic Actuator for Circuit Breakers , 2007 .