Analysis of AC Losses in a Tri-axial Superconducting Cable

Hamajima, T.; Tsuda, Makoto; Yagai, Tsuyoshi; Monma, S.; Satoh, Hiroshi; Shimoyama, Kazuki

doi:10.1109/tasc.2007.898338

Cited by 19 publications

(8 citation statements)

References 12 publications

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“…In Ampacity the axial field effects probably can be neglected. This is e.g., seen in simulation work [19], where with a ratio between pitch length and diameter of 10, as in Ampacity, the effect of pitch to the losses is less than 10 %.…”

Section: Losses Of Ampacity Cablementioning

confidence: 71%

New Experimental Method for Investigating AC Losses in Concentric HTS Power Cables

Elschner¹,

Demenčík

Douine

et al. 2015

IEEE Trans. Appl. Supercond.

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Section: Losses Of Ampacity Cablementioning

confidence: 71%

New Experimental Method for Investigating AC Losses in Concentric HTS Power Cables

Elschner¹,

Demenčík

Douine

et al. 2015

IEEE Trans. Appl. Supercond.

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“…The AC loss of the cable is calculated and reported in [2]. In this paper, the calculation result 1 W/m/phase is used for the heat analysis.…”

Section: Temperature Rise In Steady-state Conditionmentioning

confidence: 99%

Fault Current Analysis in a Tri-Axial HTS Cable

Takada

Ozcivan

et al. 2010

IEEE Trans. Appl. Supercond.

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Tri-axial cable has been rapidly developed recently because of the advantages such as more compact structure, small leakage field, and low heat and AC losses. One the other hand, it causes an inherent imbalanced three-phase currents distribution due to the different radii of concentric layers. In our previous research, it is demonstrated that a proposed tri-axial cable composed of two longitudinal sections with adjusted twist pitches can transmit balanced three-phase currents. However, before the cable can be installed in a real grid, the heat reliability of the cable in steady-state operation and fault condition should be ensured. The heat balance calculation of the tri-axial cable in steady state under the balanced current distribution allows us to estimate thermal parameters of the cable such as inlet and outlet temperatures, pressure drop and operation temperature. When a phase current suddenly changes under fault conditions, the remaining phase currents become large because of mutual inductances between fault and sound phases. Simulation of the typical fault suggests the copper stabilizer amount on the HTS tape for stability and safety. It is found that copper of 2 mm in thickness keeps the cable temperature under 110 K.Index Terms-Fault current, HTS power cable, stabilizer, triaxial cable.

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“…In case of the tri-axial cable, hysteresis losses are generated by both selfcurrent and out-of-phase external fields from other phase layers. Since these external fields are parallel to the wide surface of the HTS tapes, therefore, the slab model is effective for analysis, and so we can use Bean model for analysis [8,10,11]. The operation current of a layer generates both an azimuthal field on the outer surface of the layer and an axial field on the inner surface.…”

Section: Ac Lossesmentioning

confidence: 99%

“…Because of their low loss property compared with copper cables, they are constructed, tested in power grids [1][2][3][4] and investigated analytically in terms of magnetic field and AC loss considerations [1][2][3][4][5][6][7][8][9], especially for single phase cable architecture. Recently, a tri-axial cable composed of three concentric phases has been intensively developed since it reduces the amount of used HTS tapes and produce small leakage field and low heat loss in comparison with other three phase HTS cables.…”

Section: Introductionmentioning

confidence: 99%