Demonstration and Verification Tests of 500 m Long HTS Power Cable

Takahashi, Toshihiro; Suzuki, Hiroshi; Ichikawa, Masatoshi; Okamoto, Tatsuki; Akita, S.; Mukoyama, S.; Ishii, Noboru; Kimura, Akio; Yasuda, K.

doi:10.1109/tasc.2005.849303

Cited by 22 publications

(4 citation statements)

References 8 publications

(7 reference statements)

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“…Therefore, many projects had been conducted in the world [1]- [8]. The verification test of 500 m HTS cable had been conducted by CRIEPI under the Super-ACE project in Japan [7]- [11].…”

Section: Introductionmentioning

confidence: 99%

Short Circuit Test of HTS Power Cable

Torii

Kado

Ichikawa

et al. 2007

IEEE Trans. Appl. Supercond.

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The 500 m high temperature superconducting (HTS) cable developed by the Super-ACE (R&D of fundamental technologies for superconducting ac power equipment) project included copper layers as protection against short circuit current. The design policy was that liquid nitrogen would not vaporize when it was exposed to the short circuit current of 31.5 kA with 0.5 s. In order to establish the design policy, we have made nine 10 m samples with the same construction of the 500 m HTS cable and set three cables in the liquid nitrogen vessel. Both of balanced fault of three-line grounding (3LG) and unbalanced faults of one line grounding (1LG) and two-line grounding (2LG) have been set and fault currents have been applied to the HTS cables. After each fault, the critical current has been measured and we have confirmed no variation of before and after each fault. HTS cables have not been damaged mechanically by the fault current of 31.5 kA with 0.5 s.

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“…Therefore, many projects had been conducted in the world [1]- [8]. The verification test of 500 m HTS cable had been conducted by CRIEPI under the Super-ACE project in Japan [7]- [11].…”

Section: Introductionmentioning

confidence: 99%

Short Circuit Test of HTS Power Cable

Torii

Kado

Ichikawa

et al. 2007

IEEE Trans. Appl. Supercond.

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“…2, PDIE increased with the increase of the LN2 pressure. The minimum LN2 pressure of the actual HTS cable is tentatively set as P = 0.3 MPa [5], so the PDIE at P = 0.3 MPa was 17 kVrms/mm. Thus, taking account of tolerances, the ac design stress was set as 15 kVms/mm.…”

Section: Electrical Insulation Design Methodsmentioning

confidence: 99%

“…Verification and demonstration tests of a 500-m 77-kV 1000-A HTS cable had been implemented in Yokosuka area, CRIEPI, Japan, from November 2003 to March 2005 [4,5]. The tests aimed to clarify many technical problems such as pressure loss property, thermomechanical behavior at cool-down and warm-up periods, LN2 flow property, current flow property of superconductors.…”

Section: Verification Of Design Methods At 500-m 77 Kv Hts Cable Test mentioning

confidence: 99%

“…This paper firstly proposes the design method of the electrical insulation layer of the CD type HTS cable. Then, the proposed method is applied to the insulation design of a 500-m HTS cable tested in CRIEPI [4,5]. Moreover test results of its long-term and overvoltage tests are described and the adequacy of the proposed design methods is discussed.…”

Section: Introductionmentioning

confidence: 99%

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Insulation design method of cold dielectric type superconducting power cable and its verification tests

Suzuki

Takahashi

Ichikawa

et al.

CEIDP '05. 2005 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2005.

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A high-Tc superconducting (HTS) power cable is considered to be a major candidate for the bulk power transmission device in the future. The HTS power cable with a cold dielectric type electrical insulation system can make the outer diameter of the HTS cable compact in order to replace the conventional XLPE cable laid in underground ducts. Therefore, establishment of the electrical insulation design, HV testing and evaluation methods is the most important in the realization of the HTS power cable. From these viewpoints, the electrical insulation design method and determination of testing voltages for a 500-m HTS power cable constructed for verification tests are discussed, and the result of the various tests are described in this paper.

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Verification tests and insulation design method of cold dielectric superconducting cable

Suzuki¹,

Takahashi²,

Pokamoto³

et al. 2008

Electrical Engineering Japan

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SUMMARYA High-Temperature Superconducting (HTS) cable has a bulk power transmission capacity as a candidate for the replacement of aged cables and/or for the increase of the power transmission capacity, and its diameter is preferred to be smaller than the inner diameter of the duct for the existing cables. To reduce the diameter of HTS cable, the cold dielectric (CD)-type electrical insulation in which a cable core is immersed into liquid nitrogen (LN 2 ) should be adopted, and the thickness of its electrical insulation layer has to be optimized. Since a partial discharge (PD) in the electrical insulation layer of the CD-type HTS cable is considered as a major cause for the aging of the insulation layer, PD-free design must be adopted for the CD-type HTS cable.This paper describes a design method for the electrical insulation layer of the CD-type HTS cable adopting the PD-free design under AC stress, based on the experimental results such as a PD inception stress (PDIE), an impulse breakdown stress, and PD extinction characteristics under AC stress superimposed with an impulse stress. Moreover, the proposed design method was applied to a 500-m HTS cable and was verified by a field test.

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Demonstration and Verification Tests of 500 m Long HTS Power Cable

Cited by 22 publications

References 8 publications

Short Circuit Test of HTS Power Cable

Short Circuit Test of HTS Power Cable

Insulation design method of cold dielectric type superconducting power cable and its verification tests

Verification tests and insulation design method of cold dielectric superconducting cable

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