The DC fault current does not naturally generate zero-point, so it generates a large arc when cut-off operation. If it is failure to quickly extinguish the arc generated at the moment, lead to fire and equipment damage. Therefore, we proposed a fast and reliable transformer-type superconducting DC circuit breaker. The transformer-type superconducting current limiting elements are highly and...
Abstract—The superconducting current limiter has the advantages of small on-state loss, fast fault response speed, and strong current flow capacity. It can quickly limit the short-circuit fault current in the power system and protect the safety of power equipment. Superconducting current limiters can be divided into resistive current limiters, inductive current limiters and hybrid current...
Three-phase transformer type superconducting fault current limiter (SFCL) using two superconducting module (SM)s between secondary windings, which consisted of three-phase transformer windings wound on three legs of E-I iron core and two SMs connected between secondary windings, were suggested and its fault current limiting fault current limiting and recovery characteristics using double...
DC Interruption technology is essentially required as DC system and microgrid have increased. The Interruption technology also includes current-limiting technology, and it is suppressed the fault current that rises when the fault current occured. Until now, many hybrid Interruption technologies have been proposed in which a semiconductor element or a superconducting element is combined with a...
Among the current limiters whose performances were proved, there are many current limiters wherein their unique electrical characteristics are combined. Of these, the SFCL that uses coil and core are combined with a superconducting current limiting element and has a unique current limiting performance. Its applicability as a SFCL was proved. Especially, the initial current limiting operating...
The level of fault current increases as urban power grid expands rapidly in recent years. The traditional relay protection has difficulty in preventing increasing fault current damaging electrical devices in power grid. Magneto-biased superconducting fault current limiter (SFCL) is a novel technology with the ability of reducing the level of fault current in the first half of the cycle, which...
In this paper, DC fault current limiting characteristics of the flux-lock type superconducting fault current limiter (SFCL) with parallel and series connection between two coils were analyzed.
The flux-lock type SFCL with parallel connection between two coils was composed of two windings connected in parallel and one superconducting module (SM), which was connected in series with the...
Three-phase transformer type superconducting fault current limiter (SFCL) using secondary windings with closed loop, which consisted of three-phase transformer windings wound on three legs of E-I iron core and two/three superconducting modules (SCMs), were suggested and its fault current limiting operations according to ground-fault types were analyzed. To verify the effective operation of the...
The application scenario of Hybrid type superconducting fault current limiter (H-SFCL) is the ship DC system. Therefore, the superconducting coil works in low frequency environment. The use of iron core can effectively reduce the tapes consumption, help to reduce the end leakage magnetic field, and reduce the AC loss of the superconducting coil in operation. When designing a superconducting...
