Reduction of Steady-State Impedance in Magnetic Shielding Type Superconducting Fault Current Limiter

Mukai, Eiichi; Washimiya, S.

doi:10.1109/tasc.2004.830278

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…Hence, stable and low electrical inductance in normal operation, as well as current-limiting high electrical inductance are ideal performance of current limiter. Magnetic shielding type SFCL, which reacts fast and converts low inductance to high inductance when short circuit fault occurs, can be able to achieve these target [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

A New Type of DC Superconducting Fault Current Limiter

Wei

Xin

Hong

et al. 2019

IEEE Trans. Appl. Supercond.

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A new type S uperconducting Fault Current Limiter (S FCL) for dc applications is proposed. This SFCL consists of a current transmission/ limiting coil, an iron-core, and a set of superconductor rings. The superconductor rings are placed between the current transmission/ limiting coil and the iron-core. For application, the current transmission/ limiting coil is connected in series to a dc transmission line. During normal power transmission, magnetic flux coupling between the current transmission/ limiting coil and the iron-core is prevented by the magnetic shielding of the superconductor rings, and the current transmission coil has low impedance. Because of shielding effect of the superconductor rings iron core has high permeability at the beginning of short circuit, current limiting coil can effectively limit fault current rise. When the fault current reaches a certain level, the superconductor rings will quench and the shielding effect is greatly reduced. The current limiting coil strengthens the coupling with the iron core, increases the inductance, and will suppress the further increase of the fault current.A laboratory proof of concept prototype was made to demonstrate the feasibility of the idea. Experiments have been carried out with the prototype. In this presentation, we will introduce the detailed information of the principle, the prototype, and the experimental results. In addition a design of the new type DC S FCL is installed in a  160kV HVDC system.  Index Terms-DC power system, Fault current, Magnetic shielding, and S FCL S uperconducting Fault-Current Limiters

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Section: Introductionmentioning

confidence: 99%

A New Type of DC Superconducting Fault Current Limiter

Wei

Xin

Hong

et al. 2019

IEEE Trans. Appl. Supercond.

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show abstract

“…Although the value of the leakage impedance is low, it is desired to reduce the impedance during the steady-state operation. For a two-divided model of the MSFCL, we already reported on the reduction of the impedance in the steady-state operation [3].…”

Section: Introductionmentioning

confidence: 99%

Study on reduction of steady-state impedance in magnetic shielding type superconducting fault current limiter

Mukai

Tada

2008

2008 18th International Conference on Electrical Machines

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A magnetic shielding type superconducting fault current limiter (MSFCL) has undesirable leakage impedance and thus the voltage drop relating to the leakage impedance occurs in the steady-state operation (the standby condition of a fault). Therefore, this paper proposes a divided MSFCL model to reduce the value of the leakage impedance in the steady-state operation. The four-divided model of MSFCL was actually constructed. Then experiments were carried out to demonstrate the advantage of the divided model. Moreover, the divided model was compared with a non-divided model with the same turns of the coils. We confirmed the advantage of the divided model through these experiments.

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Modeling of Shield-Type Superconducting Fault-Current-Limiter Operation Considering Flux Pinning Effect on Flux and Supercurrent Density in High-Temperature Superconductor Cylinders

Hekmati

2013

J Supercond Nov Magn

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Reduction of Steady-State Impedance in Magnetic Shielding Type Superconducting Fault Current Limiter

Cited by 4 publications

References 3 publications

A New Type of DC Superconducting Fault Current Limiter

A New Type of DC Superconducting Fault Current Limiter

Study on reduction of steady-state impedance in magnetic shielding type superconducting fault current limiter

Modeling of Shield-Type Superconducting Fault-Current-Limiter Operation Considering Flux Pinning Effect on Flux and Supercurrent Density in High-Temperature Superconductor Cylinders

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