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ABSTRACT: 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.
Electrical Insulation and Dielectric Phenomena, 2005. CEIDP '05. 2005 Annual Report Conference on; 11/2005
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ABSTRACT: The 500 m high temperature superconducting cable (HTS cable) is 77 kV 1 kA single-core cable with LN2-impregnated paper insulation. Demonstration and verification test of 500 m HTS cable has been started from March 2004 and many useful results can be obtained in the test for future practical uses. Furukawa Electric has mainly taken charge of designing, manufacturing and installation of the 500 m cable. In the manufacturing process, the cable could be fabricated without Ic degradation in Ag/Bi-2223 tapes. Moreover, various factory tests were carried out for the 500 m cable. The result of tests showed that the cable has sufficiently satisfied the quality requirement. In the installation, the cable was successfully pulled into a cable duct of 170 m long like actual underground cable installations.
IEEE Transactions on Appiled Superconductivity 07/2005; · 1.04 Impact Factor
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ABSTRACT: A high-temperature superconducting (HTS) power transmission cable is considered as one of the next-generation power transmission technologies. The introduction of HTS cables into the actual power grid requires a long-distance cooling tube, due to the location of the cooling stations at intervals of several kilometers along the cable length. Therefore, it is essential to understand the flow property of the liquid nitrogen as a coolant for the HTS cable, the current flow properties, electrical insulation characteristics, thermal insulation properties and mechanical behavior for the HTS cable taking into account its long length. This paper provides a brief summary of the HTS cable test system with a length of 500 m constructed in the Yokosuka area of CRIEPI.
IEEE Transactions on Appiled Superconductivity 07/2005; · 1.04 Impact Factor
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S. Mukoyama,
S. Maruyama,
M. Yagi, N. Ishii,
H. Kimura,
H. Suzuki,
M. Ichikawa,
T. Takahashi,
T. Okamoto,
A. Kimura,
K. Yasuda
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ABSTRACT: A high-Tc superconducting cable (HTS cable) can transmit more power with lower loss than conventional cables. HTS cable is expected to be a compact and economical transmission line to meet the increasing electrical demands of cities. However, some technical problems must be solved to bring the HTS cable into practical use. Demonstration and verification tests of the world’s longest (500 m) HTS cable have been carried out as part of the Super-ACE project. The 500 m cable was a single-core, cold-dielectric type with a small enough diameter to be installed inside a 150 mm cable duct. We have already successfully completed the production and installation required for the field tests at the Yokosuka laboratory of CRIEPI. The test layout included a 10 m high section, an underground section and an offset section for absorbing the thermal contraction, so as to simulate real transmission lines. Over the course of a year, CRIEPI and Furukawa Electric have conducted numerous experiments on the thermo-mechanical behavior and operating characteristics of the cooling system and the electrical and superconducting properties of the cable, both at its rated load and with a fluctuating load and an overload.
Physica C: Superconductivity.
