The effect of interlayer insulation on the transport AC loss of the high-Tc superconducting multilayer conductor

Noji, H.

doi:10.1016/s0921-4534(00)01734-2

Cited by 5 publications

(3 citation statements)

References 8 publications

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“…In this case, the layer currents become higher at the outer layer. ωL am and ωM aml increase with increasing r m , as shown in equations ( 4) and (5). Both values are controlled by the winding pitch P m and P l .…”

Section: Layer Currentsmentioning

confidence: 83%

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Alternating current loss calculation in a high-T_Csuperconducting transmission cable considering the magnetic field distribution

Noji

Haji

Hamada

2002

Supercond. Sci. Technol.

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We have calculated the alternating current (ac) losses of a 114 MVA high-T C superconducting (HTS) transmission cable using an electric-circuit (EC) model. The HTS cable is fabricated by Tokyo Electric Power Company and Sumitomo Electric Industries, Ltd. The EC model is comprised of a resistive part and an inductive part. The resistive part is obtained by the approximated Norris equation for a HTS tape. The Norris equation indicates hysteresis losses due to self-fields. The inductive part has two components, i.e. inductances related to axial fields and those related to circumferential fields. The layer currents and applied fields of each layer were calculated by the EC model. By using both values, the ac losses of the one-phase HTS cable were obtained by calculation considering the self-field, the axial field and the circumferential field of the HTS tape. The measured ac loss transporting 1 kA rms is 0.7 W m −1 ph −1 , which is equal to the calculation. The distribution of each layer loss resembles in shape the distribution of the circumferential field in each layer, which indicates that the circumferential fields strongly influence the ac losses of the HTS cable.

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Section: Layer Currentsmentioning

confidence: 83%

“…We have reported that the electric-circuit (EC) model is useful for an analysis of ac properties in HTS conductors [3][4][5]. In this paper, we show a method of calculating the ac losses by using the EC model for the HTS cable.…”

Section: Introductionmentioning

confidence: 99%

Alternating current loss calculation in a high-T_Csuperconducting transmission cable considering the magnetic field distribution

Noji

Haji

Hamada

2002

Supercond. Sci. Technol.

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“…Electrical insulation of superconducting elements is required in diverse applications of superconductivity [7][8][9][10]. It is most likely that the solution to the insulation problem for superconductors will differ for each specific application depending on many factors such as the processing route, operating conditions and conductor type, size and shape [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Insulation coating of silver tapes using an organometallic solution of Zr and Ca for application to Bi-based superconductors

Belenli

Türkoğlu

2002

Supercond. Sci. Technol.

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Silver tapes were spray coated using an organometallic solution as the carrier liquid. When this solution was annealed in air at 825 • C, ∼4% of its total weight remained as CaZrO 3 . Mixtures of Bi 2 O 3 , SrCO 3 and CaCO 3 have been prepared with seven different stoichiometries. An organometallic solution was mixed with ceramic oxide powders and spray coated onto silver tapes. Electrical insulation tests were performed applying a dc potential, and insulation survived more than 30 V. Coated tapes were coiled to progressively decreasing diameters down to 1 mm diameter with no sign of cracking, indicating the possibility of metallic bonding and diffusion. This technique appears to be suitable for use in the insulation of Bi-based superconducting tapes and wires, since it does not contain any element that is chemically reactive to this system.

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Reduction of alternating current loss in a high-TC superconducting transmission cable by means of helical pitch adjustment

2004

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The effect of interlayer insulation on the transport AC loss of the high-Tc superconducting multilayer conductor

Cited by 5 publications

References 8 publications

Alternating current loss calculation in a high-T_Csuperconducting transmission cable considering the magnetic field distribution

Alternating current loss calculation in a high-T_Csuperconducting transmission cable considering the magnetic field distribution

Insulation coating of silver tapes using an organometallic solution of Zr and Ca for application to Bi-based superconductors

Reduction of alternating current loss in a high-TC superconducting transmission cable by means of helical pitch adjustment

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The effect of interlayer insulation on the transport AC loss of the high-Tc superconducting multilayer conductor

Cited by 5 publications

References 8 publications

Alternating current loss calculation in a high-TCsuperconducting transmission cable considering the magnetic field distribution

Alternating current loss calculation in a high-TCsuperconducting transmission cable considering the magnetic field distribution

Insulation coating of silver tapes using an organometallic solution of Zr and Ca for application to Bi-based superconductors

Reduction of alternating current loss in a high-TC superconducting transmission cable by means of helical pitch adjustment

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Product

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Alternating current loss calculation in a high-T_Csuperconducting transmission cable considering the magnetic field distribution

Alternating current loss calculation in a high-T_Csuperconducting transmission cable considering the magnetic field distribution