High-Tc Superconducting Fault Current Limiter Controlling the Amplitude of Fault Current Using Thyristor

摘要

PURPOSE: A high-temperature superconduction current limiting apparatus capable of controlling the quantity of an accidental current using a thyrister is provided to increase the breaking capacity of a current limiter by using the resistance generated in proportion to a magnetic field applied to a high-temperature superconduction device. CONSTITUTION: A first winding and a second winding are connected to an iron core. A high-temperature superconduction bulk or a thin film device is connected in serial to the second winding. A phase control rectifying circuit is comprised of a special third winding installed on the same core winded by the first winding and the second winding and a thyrister connected to the third winding. The thyrister is comprised of a high-temperature superconduction device connected to the second winding and a magnetic field applying coil connected to an output end of the phase control rectifying circuit connected to the third winding. The thyrister applies a magnetic field to the high-temperature superconduction device without applying an additional power at the time of accident.