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HTS cable demonstration project supported by Ministry of Economy, Trade and Industry (METI) and New Energy and Industrial Technology Development Organization (NEDO) has started in Japan. The target of this project is to operate a 66 kV, 200 MVA HTS cable in the live network of Tokyo Electric Power Company in order to demonstrate its reliability and stable operation. The design of the HTS cable with DI-BSCCO has been completed as well as those of a termination and a joint. A 30-meter HTS cable system with terminations, a joint and a cooling system was installed in SEI facility to confirm their design and performance. Various tests as voltage tests, nominal and over current tests, heat cycle tests, heat loss measurements and so on were conducted and it is verified that the cable has good performances as design. This paper describes the design and test results of a 30-meter HTS cable, and discusses required test items of HTS cables. [ABSTRACT FROM AUTHOR]

Abstract: A new high temperature superconducting (HTS) cable project supported by Ministry of Economy, Trade and Industry (METI) and New Energy and Industrial Technology Development Organization (NEDO) has started in Japan. Target of this project is to demonstrate the reliable and stable operate of a 66kV, 200 MVA HTS cable in the grid. Tokyo Electric Power Company (TEPCO) provides the real grid and studies the impact of connecting the HTS cable to the existing conventional facilities in Yokohama. Sumitomo Electric Industries, Ltd. (SEI) manufactures the HTS cable, terminations and joint. Mayekawa Corporation provides a cooling system. One of the technical targets in the project is to reduce the AC loss of superconducting cable. For this purpose, a new type DI-BSCCO, which is a production name of BSCCO wires made by SEI, with twisted superconducting filaments is planed to be applied in the cable. A short cable core using the new wires shows less AC loss than 1W/m/ph at 2kArms. Another important point is to design a cable system to withstand a large over current at a short circuit failure. At a preliminary test with a short cable, it was recognized that the cable had no degradation of conductor Ic after applying the fault current of 31.5kA for 2s, which are required for 66kV line. This report shows details of these experiment results and design of the cable. [Copyright &y& Elsevier]