Design of a large current-type fault current limiter with YBCO films

Shimohata, Kenji; Yokoyama, Syoichi; Inaguchi, Takashi; Nakamura, Shirô; Ozawa, Yasuo

doi:10.1016/s0921-4534(02)01088-2

Cited by 31 publications

(7 citation statements)

References 4 publications

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“…There are two ways to satisfy the requirements of a RSFCL: (I) improving the functionality of the REBCO tape itself such as with a Ni-Cr stabilizer or fins, or (II) developing a RSFCL structure such as using an external resistance [8]. At the first step of this study, we focused on the former way because the REBCO tape functionality should be improved to realize a practical RSFCL even for the latter way.…”

Section: Concept Of Porous-stabilized Rebco Tapementioning

confidence: 99%

Recovery performance of partially-joined porous-stabilized REBCO tape for resistive type superconducting fault current limiters

Yuki

Hashizume

2020

Supercond. Sci. Technol.

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In the case of using rare-earth barium copper oxide (REBCO) tape as a current-limiting element, there are three requirements: high normal state resistance, high thermal stability, and quick recovery to the superconducting state. In this study, a new type of REBCO tape with a metal porous medium as a stabilizer (a porous-stabilized REBCO tape) was proposed, which has high resistance compared to bulk material and prevents film boiling due to its strong capillary force. First, a numerical simulation was performed to evaluate the current-limiting performance of the porous-stabilized REBCO tape with a Ni-Cr porous medium. The results showed that the current-limiting performance was dramatically improved by placing indium partially on the REBCO tape to join the porous medium compared to placing indium wholly. Then, the porous-stabilized REBCO tapes with various arrays of indium were manufactured, and tested to confirm its recovery characteristics. The experimental results indicated that the partially-joined Ni-Cr porous-stabilized REBCO tape reduced the recovery time by 69% compared to that of the stabilizer-free REBCO tape.

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Section: Concept Of Porous-stabilized Rebco Tapementioning

confidence: 99%

Recovery performance of partially-joined porous-stabilized REBCO tape for resistive type superconducting fault current limiters

Yuki

Hashizume

2020

Supercond. Sci. Technol.

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“…Many papers have proposed the replacement of large breakers or power equipment of high impedance, installation of serial reactors, and separation of linkage lines as an alternative plan, but economic problems and technical stability of power still remain to be solved [4][5][6]. The ideal alternative plan to more effectively control the fault current is to use the superconducting current limiter (SFCL), using superconducting properties [7][8][9]. It actively advances the development of the SFCL and applications for practical use.…”

Section: Introductionmentioning

confidence: 99%

Analysis on Current Limiting and Bus-voltage Sag Suppressing Characteristics of a Flux-lock type SFCL using an Isolated Transformer

Lee¹

2020

International Journal of Engineering Research and Technology

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In this paper, the current limiting and bus-voltage sag suppressing characteristics of a flux-lock type superconducting fault current limiter (SFCL) with an isolated transformer were analyzed through short-circuit tests for a simulated power system with the SFCL. The isolated transformer, which was connected to the superconducting (SC) element of the flux-lock type SFCL, was designed to improve the current limiting and the bus-voltage sag suppressing characteristics of the flux-lock type SFCL by preventing the fault current from directly passing through the SC element. An analysis of the experimental results considering the winding ratio of the isolated transformer confirmed that the flux-lock type SFCL, which was planned with a lower winding ratio, performed the limiting operation more effectively, while the flux-lock type SFCL with a higher winding ratio of the isolated transformer, was more effective from the point of view of the suppression of the bus-voltage sag.

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“…Superconducting fault-current limiters (FCL) have been widely developed as one of the promising applications of high-T c superconductors (HTS). Resistive-type FCLs that use the instantaneous transition from super-to normal conduction due to fault currents are extensively investigated, for example, in a national project of Japan, 'Research and development of fundamental technologies for superconducting AC power equipment (Super-ACE)' [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…The target size of the substrates is 30 × 10 cm 2 in the Super-ACE project [1]. Sapphire is the most suitable substrate material, because its high thermal conductivity prevents mechanical breakage due to large thermal stresses upon quenching [2]. A proper buffer layer, such as CeO 2 , is also required between YBa 2 Cu 3 O 7 (YBCO) and sapphire to prevent chemical reaction at the interface as well as to relax the large lattice mismatch between YBCO and sapphire, i.e.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional large-size Y Ba₂Cu₃O₇films (30 × 10 cm²) on CeO₂-buffered sapphire by a coating pyrolysis process

Manabe¹,

Sohma²,

Yamaguchi³

et al. 2004

Supercond. Sci. Technol.

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Large-size, two-dimensional Y Ba2Cu3O7 (YBCO) films were successfully prepared by a chemical solution-based coating pyrolysis (CP) process on 30 × 10 cm2 R-plane sapphire substrates with a vacuum-deposited CeO2 buffer layer. The CeO2 layer was very smooth and uniform with an average roughness (Ra) of 0.48 nm by atomic force microscopic observations and highly (001)-oriented by large-area x-ray diffraction θ–2θ scans. The c-axis-oriented YBCO films were prepared by a CP process using a fluorine-free, metal acetylacetonate-based coating solution. A 30 × 10 cm2-rectangular c-axis-oriented YBCO film annealed in a large-diameter tube furnace demonstrated high inductive-Jc values, for which the distribution was fairly uniform, with an average 1.0 MA cm−2 at 77 K.

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Design of a large current-type fault current limiter with YBCO films

Cited by 31 publications

References 4 publications

Recovery performance of partially-joined porous-stabilized REBCO tape for resistive type superconducting fault current limiters

Recovery performance of partially-joined porous-stabilized REBCO tape for resistive type superconducting fault current limiters

Analysis on Current Limiting and Bus-voltage Sag Suppressing Characteristics of a Flux-lock type SFCL using an Isolated Transformer

Two-dimensional large-size Y Ba₂Cu₃O₇films (30 × 10 cm²) on CeO₂-buffered sapphire by a coating pyrolysis process

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Design of a large current-type fault current limiter with YBCO films

Cited by 31 publications

References 4 publications

Recovery performance of partially-joined porous-stabilized REBCO tape for resistive type superconducting fault current limiters

Recovery performance of partially-joined porous-stabilized REBCO tape for resistive type superconducting fault current limiters

Analysis on Current Limiting and Bus-voltage Sag Suppressing Characteristics of a Flux-lock type SFCL using an Isolated Transformer

Two-dimensional large-size Y Ba2Cu3O7films (30 × 10 cm2) on CeO2-buffered sapphire by a coating pyrolysis process

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Product

Resources

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Two-dimensional large-size Y Ba₂Cu₃O₇films (30 × 10 cm²) on CeO₂-buffered sapphire by a coating pyrolysis process