Comparative Study of Solid and Thin-Layers Superconducting Fault Current Limiters SFCL for Electrical Network Transient Stability Improvement.

This document presents a comparative study of solid and thin-layers superconducting fault current limiter (SFCL) for electrical network transient stability improvement. Two applications of transient stability appraisal are presented in this article: the first shows the efficiency of the massive and thin-layers SFCL in series with a generator; the second uses SFCL installed in series with a transmission line. SFCL can only be used during the period from the fault occurrence to the fault clearing; the modeling and the effect of SFCL have been investigated to have higher benefits for the power system. In the present work, modification of the admittance matrix method is used for modeling of SFCL; critical clearing time (CCT) has been used as an index for evaluated transient stability. The results of the simulations showed the benefit of designing a superconducting current limiter from thin layers. These considerably improve not only the thermal stresses of the current limiter during the process of limiting the fault current by the significant decrease in temperature but also by its important contributions for the improvement of the transient stability of the electrical network. Thus, they can considerably extend the life of a second-generation superconducting current limiter. The modeling of the network tests will be made by PSAT under the MATLAB environment. [ABSTRACT FROM AUTHOR]