SUPERCONDUCTING FAULT CURRENT LIMITER FOR PROTRCTING POWER SYSTEM AND CIRCUIT BREAKER SYSTEM INCLUDING THE SAME

摘要

A superconducting fault current limiter for protecting a power system including a circuit breaker for blocking a line during a failure includes: a superconducting element which has zero electrical resistance in a normal state of the power system, and has resistance generated by fault current when a failure occurs; a switch which is serially connected to the superconducting element, and is turned off if the fault current is a threshold value or higher; a current limiting element which is connected to the superconducting element and the switch in parallel, and conducts the fault current if the switch is turned off; and a capacitor which is connected to the fault current limiting element in parallel, and stabilizes voltage characteristics of the circuit breaker. Therefore, the superconducting fault current limiter has an effect of limiting fault current enough and can protect the power system by securing a stable operation of a protection device.