Operating Characteristics of Superconducting Fault Current Limiting Transformer (SFCLT) and Enhancement of Electric Power System Stability

Abstract

We have been investigating the feasibility on Superconducting Fault Current Limiting Transformer (SFCLT) with the functions of fault current suppression and system stability improvement. This paper discusses these functions with consideration of overvoltage and thermal characteristics of SFCLT, and their dependence on recovery time into superconducting state after the quench of SFCLT. Simulation results using EMTP suggested that SFCLT would be coordinated with the background power system under the appropriate superconducting recovery time. The operating parameters of SFCLT were also optimized in a simplified power transmission model system.