50-m long HTS conductor for power cable

Mukoyama, S.; Miyoshi, K.; Tsubouti, H.; Mimitra, M.; Uno, Naoki; Ichtyanagi, N.; Tanaka, Yasuzô; Ikeda, M.; Ishii, Hideo; Honjo, S.; Sato, Y.; Hara, T.; Iwata, Y.

doi:10.1109/77.614709

Cited by 50 publications

(18 citation statements)

References 3 publications

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“…Their initial work was applied to cables based on Nb 3 Sn. Later authors [2][3][4][5] addressed the theory of ac loss in cables using first generation (1G) high temperature superconductor (HTS) tapes based on BSCCO-2223.…”

Section: Introduction: Components Of Ac Loss In 2g Hts Cablesmentioning

confidence: 99%

Theory of ac loss in power transmission cables with second generation high temperature superconductor wires

Clem

Malozemoff

2010

Supercond. Sci. Technol.

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While a considerable amount of work has been done in an effort to understand ac losses in power transmission cables made of first generation high temperature superconductor (HTS) wires, use of second generation (2G) HTS wires brings in some new considerations. The high critical current density of the HTS layer in 2G wires reduces the surface superconductor hysteretic losses, for which a new formula is derived. Instead, gap and polygonal losses, flux transfer losses in imbalanced two-layer cables and ferromagnetic losses for wires with NiW substrates constitute the principal contributions. A formula for the flux transfer losses is also derived with a paramagnetic approximation for the substrate. Current imbalance and losses associated with the magnetic substrate can be minimized by orienting the substrates of the inner winding inward and the outer winding outward.

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Section: Introduction: Components Of Ac Loss In 2g Hts Cablesmentioning

confidence: 99%

Theory of ac loss in power transmission cables with second generation high temperature superconductor wires

Clem

Malozemoff

2010

Supercond. Sci. Technol.

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“…[20,26,27], but the real cause of the behavior was not understood. Proximity-effect will affect the work capacity and operation loss of a superconducting power device.…”

Section: Discussionmentioning

confidence: 97%

A nontrivial factor in determining current distribution in an ac HTS cable-proximity effect

Xin

Gong

Zhang

2010

Sci. China Technol. Sci.

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A superconductor has zero resistance at the superconducting state. This unique property creates many exceptional phenomena, of which some are known and the others are not. Our experiments with multilayer high temperature superconductor (HTS) cable samples revealed a new phenomenon that alternating current had a tendency to flow in the inner and outer layers of the cables. We attribute the cause of this phenomenon to the electromagnetic interaction in an infinite electrical conductivity medium and term it "super-proximity-effect". This effect will greatly affect the performance of a multilayer superconducting cable and other superconducting devices which are involved with alternating current transportation. HTS cables, proximity-effect, superconductivity, electromagnetic interaction Citation:Xin Y, Gong W Z, Zhang J Y. A nontrivial factor in determining current distribution in an ac HTS cable-proximity effect. Sci China Tech Sci, 2010, 53: 922−928,

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“…1 shows the measurements of AC losses. A line indicates the calculated AC losses in a conductor with uniform current distribution (UCD model) [6], and AC losses were 1.39 W/m at 3 kA. Therefore, our target, 1 W/m or less at 3 kA, could not be attained only by adjusting the winding pitches.…”

Section: Hts Conductor and Electrical Measurementmentioning

confidence: 99%

Measurement of ac losses of superconducting cable by calorimetric method and development of HTS conductor with low AC losses

Yagi

Tanaka

Mukoyama

et al. 2003

IEEE Trans. Appl. Supercond.

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To achieve compact and highly efficient HTS power transmission cables, reducing and evaluating AC losses is important. Furukawa is developing conductors with low AC losses of 1 W/m at 3000 Arms for the 66/77 kV class HTS cables as a part of the Super-ACE project. Specifically, we aim to achieve a superconducting conductor with minimum AC losses by optimizing the winding pitches and twisted filaments in the tape.The electrical method is generally used to evaluate AC losses in HTS cables. However, measures of AC losses were uncertain using only the electrical method of evaluation. Therefore, the calorimetric device was developed and was used for determining AC losses. Consequently, results from the two methods almost agreed. Moreover, AC losses in the fabricated HTS conductors were measured at the lowest levels ever achieved.

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50-m long HTS conductor for power cable

Cited by 50 publications

References 3 publications

Theory of ac loss in power transmission cables with second generation high temperature superconductor wires

Theory of ac loss in power transmission cables with second generation high temperature superconductor wires

A nontrivial factor in determining current distribution in an ac HTS cable-proximity effect

Measurement of ac losses of superconducting cable by calorimetric method and development of HTS conductor with low AC losses

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