A single DC reactor type fault current limiting interrupter for three-phase power system

The authors propose a single DC reactor type fault current limiting interrupter (FCLI) for a three-phase power system. The device uses a single high temperature superconducting (HTS) coil that operates in conjunction with a modified half control bridge composed of thyristors and diodes connected to a transformer's secondary windings. One variety is an automatic interrupter, which automatically blocks fault current through the application of DC bias current to the bridge. Another is a gate interrupter, which does the same thing by locking the thyristor's gate pulses. The authors examine the results of various simulations on a new device that both limits and interrupts fault current in a three-phase power system.