Cryogenic System for DC Superconducting Power Transmission Line

Hamabe, M.; Sasaki, Atsushi; Famakinwa, Tosin; Ninomiya, A.; Ishiguro, Yasuhide; Yamaguchi, S.

doi:10.1109/tasc.2007.898335

Cited by 7 publications

(2 citation statements)

References 8 publications

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“…Since a 200 m DC SC-PT test facility has been constructed at Chubu University [5], studies on the critical current measurements are investigated relating to the tape arrangements by using the BSCCO tapes [6]. In order to lower the heat leak through the cryogenic pipe, the compact cable should be designed to reduce the radiation effect between the low temperature and room temperature [7]. In the DC SC-PT system, the coaxial bipolar cable is used as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Effects of HTS Tape Arrangements to Increase Critical Current for the DC Power Cable

Sun

Watanabe

Hamabe

et al. 2013

IEEE Trans. Appl. Supercond.

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Critical current of the high-temperature superconducting (HTS) tape is one of the important parameters for the application of power cables. After combination of the tapes in the cable, the self-field of the tape will be affected by the field from the other tapes, which will result in the degradation of the tape performance. Recently, a 200-m HTS cable test facility for dc power transmission and distribution has been constructed at Chubu University by using BSCCO tapes. In order to optimize the configuration of the HTS tapes in the cable, the effects on the critical current of the tape arrangements are investigated. In order to achieve high current capacity and efficiency of the cable, a multilayer configuration of the tapes is employed. This technical paper will present the measurements of the critical currents of the tape against the layer structures and the gaps between the HTS tapes. The critical current of the tape is measured by the four-probe method at liquid nitrogen temperature. We will present the effects on the critical current of the tape of the magnetic field from the currents applied to the neighboring tapes in the cable. An improvement of the critical current is observed, which suggests the design of DC HTS power cables regarding the tape arrangements may influence the cable property.

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Section: Introductionmentioning

confidence: 99%

Effects of HTS Tape Arrangements to Increase Critical Current for the DC Power Cable

Sun

Watanabe

Hamabe

et al. 2013

IEEE Trans. Appl. Supercond.

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“…Several projects of DC HTS power cables are planned [7]- [9]. One of them is the Tres Amigas, as the interconnecting hub of electric transmissions linking other electric grids with DC HTS cable, which will be installed in New Mexico, USA in 2014 with capacity of several gigawatt [10].…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach for Design of DC HTS Cable

Wang

Zheng

Liu

et al. 2011

IEEE Trans. Appl. Supercond.

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High temperature superconducting (HTS) cable is one of important apparatus in future smart-grid. Direct current (DC) HTS cable can provide secure and reliable transmission of electric power at the gigawatt level with several hundreds of kA and kV. Since the magnetic field of cable seriously degrades the critical current of HTS superconductor and then the current capacity, modern power converters often introduce alternating currents (AC) at other frequencies even filters reduce the magnitude of those ripple currents which resulting into ac loss since systems used to convert AC to direct current (DC) produce some current variations which are usually at frequencies of multiple power frequency. In order to reduce this loss, unlike the conventional uniform current design in AC HTS cable, a novel approach is proposed for minimizing the loss as small as possible by adjusting the inductive reactance of each layer so that the ratios of AC current amplitude to critical current are always same in layers. The magnetic field distribution and critical current are simulated by finite element method (FEM). The calculations show that the new approaches can reduce ac loss, improve efficiency, which are potential for DC current transmission HTS cable application.Index Terms-AC loss, DC power transmission, HTS cable, inductive reactance, ratio.

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