Development of 6.6 kV-200 A DC Reactor Type Superconducting Fault Current Limiter

Lee, Seung; Kang, Hyoungku; Bae, Duck Kwoen; Ahn, Min Cheol; Mun, Taegong; Park, Keuntae; Lee, Yangjoo; Ko, Tae Kuk

doi:10.1109/tasc.2004.830304

Cited by 14 publications

(4 citation statements)

References 8 publications

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“…As an example of the possible applications of our model, in this section we show the results of AC loss computation for the case of a solenoid composed of several turns of superconducting Bi-2223/Ag tape. Such geometry can be useful for fault-current limiter (FCL) applications [15][16][17] and it is a good example of where the interaction between contiguous tapes is important and where FEM techniques are especially useful. Since FCLs operate at subcritical current for most of the time, it is very important that they have reduced AC power dissipation in such conditions, in addition to a good electrical and thermal performance in the limiting phase [18].…”

Section: The Model In Practical Hts Applicationsmentioning

confidence: 99%

Development of an edge-element model for AC loss computation of high-temperature superconductors

Brambilla

Grilli

Martini

2006

Supercond. Sci. Technol.

425

331

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This paper presents a new numerical model for computing the current density, field distributions and AC losses in superconductors. The model, based on the direct magnetic field H formulation without the use of vector and scalar potentials (which are used in conventional formulations), relies on first-order edge finite elements. These elements are by construction curl conforming and therefore suitable to satisfy the continuity of the tangential component of magnetic field across adjacent elements, with no need for explicitly imposing the condition . This allows the overcoming of one of the major problems of standard nodal elements with potential formulation: in the case of strong discontinuities or nonlinearities of the physical properties of the materials and/or in presence of sharp corners in the conductors’ geometry, the discontinuities of the potentials’ derivatives are unnatural and without smoothing artifices the convergence of the algorithm is put at risk. In this work we present in detail the model for two-dimensional geometries and we test it by comparing the numerical results with the predictions of analytical solutions for simple geometries. We use it successively for investigating cases of practical interest involving more complex configurations, where the interaction between adjacent tapes is important. In particular we discuss the results of AC losses in superconducting windings.

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Section: The Model In Practical Hts Applicationsmentioning

confidence: 99%

Development of an edge-element model for AC loss computation of high-temperature superconductors

Brambilla

Grilli

Martini

2006

Supercond. Sci. Technol.

425

331

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“…The comparison of them can be shown in Table 3 [20,21]. By considering the flux-coupling type SFCL 0 s requirements for critical current and electrical insulation properties, the solenoid type HTS coil may be more appropriate than the double pancake coil.…”

Section: Structure Of Superconducting Coilmentioning

confidence: 99%

Effects of a flux-coupling type superconducting fault current limiter on the surge current caused by closed-loop operation in a 10kV distribution network

Chen

Deng

et al. 2015

International Journal of Electrical Power & Energy Systems

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“…This bridge type SFCL is generally composed of a diode or thyristor and a superconducting coil, and has the disadvantage of being larger than other types of SFCL due to the superconducting coil. In addition, this SFCL is expensive and requires controllers and circuit breakers to protect the superconducting coils from accidents [8][9][10][11]. In order to overcome this drawback, DC double reactor type SFCL using switching operation of a high-temperature superconducting (HTSC) device has been proposed and fault current limiting characteristics have been reported [12].…”

Section: Introductionmentioning

confidence: 99%

Magnetizing Characteristics of Bridge Type Superconducting Fault Current Limiter (SFCL) with Simultaneous Quench Using Flux-Coupling

Han

Lim

2020

Energies

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A bridge type superconducting fault current limiter (SFCL) with simultaneous quench using two high-temperature superconducting (HTSC) elements and two coils was fabricated to analyze the fault current limiting characteristics. Before and after the fault occurrence, the current limiting operation and the voltage waveforms of each device were compared according to the change of the input voltage. We also analyzed flux linkages and instantaneous powers of the bridge type SFCL with simultaneous quench using flux-coupling composed of HTSC elements with different critical currents. During the fault period, the magnetization power area and the flux linkage’s operating range variation due to the magnetizing current were compared with each other.

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Development of 6.6 kV-200 A DC Reactor Type Superconducting Fault Current Limiter

Cited by 14 publications

References 8 publications

Development of an edge-element model for AC loss computation of high-temperature superconductors

Development of an edge-element model for AC loss computation of high-temperature superconductors

Effects of a flux-coupling type superconducting fault current limiter on the surge current caused by closed-loop operation in a 10kV distribution network

Magnetizing Characteristics of Bridge Type Superconducting Fault Current Limiter (SFCL) with Simultaneous Quench Using Flux-Coupling

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