成果報告書詳細
管理番号20120000000445
タイトル*平成23年度中間年報 イットリウム系超電導電力機器技術開発
公開日2012/6/13
報告書年度2011 - 2011
委託先名住友電気工業株式会社
プロジェクト番号P08016
部署名省エネルギー部
和文要約和文要約等以下本編抜粋:
1. 研究開発の内容及び成果等
2「超電導電力ケーブルの研究開発」
(1) 大電流・低交流損失ケーブル化技術の開発
(a) 大電流・低交流損失技術の基礎特性評価
・京都大学で損失シミュレーション結果から、損失が大きい導体外層に2mm 幅に細線化した線材を採用すること(Hybrid 構造)による低損失化の指針を得た。
・本指針をもとに、導体3 層目および4 層目に2mm 幅線材を用いた4 層導体を試作して損失特性を測定した結果、0.8W/m@5kA を検証し、極低損失化の可能性を示した。さらに、シールド層を有するHybrid ケーブルコアを試作し、中間目標2W/m-相@5kA よりも小さい1.5W/m-相@5kA の損失特性を検証した。
英文要約Title : Technological Development of Yttrium-based Superconducting Power Equipment (FY2008-2012) FY2011 Annual Report
 An AC loss simulation study was performed at Kyoto University, and the results indicated that the Hybrid cable structure, in which 2 mm-wide and 4 mm-wide wires were combined in right place, is effective in reducing the AC loss. Based on the simulation findings, a 4-layer Hybrid cable conductor was manufactured. The measured AC loss was 0.8 W/m/phase at 5 kA, showing that extremely low-loss cables can be realized by using 2 mm-wide wires. Finally, a Hybrid cable with shield layers was manufactured, and the measured AC loss was 1.5 W/m/phase at 5kA, which is lower than the AC loss target of 2 W/m/phase.
 The design study of cable-to-cable joints for the 66 kV-class HTS cable was performed. The cable samples with a joint were manufactured on the basis of the design, and withstanding voltage tests and thermo-mechanical tests were conducted. AC voltages of 90 kV for 3 hours and 130 kV for 10 minutes were applied to the sample, and good results were obtained. The sample also withstood impulse voltages of ±385 kV for 3 times. It was also confirmed that the sample was not damaged by the tensile force of 1000 kgf and compressive force of 200 kgf.
 A cooling system and terminations were designed for the long-term verification test of a 15 m-long cable, and the manufacture was started.
 We have been manufacturing HTS wires for a 15 m-long power cable under co-operation with ISTEC. In FY2011, we manufactured 1.5 km (@1cm width) of GdBCO coated conductors with Je of 15 to 20kA/cm2 and 2 and 4 mm-width by using the clad-type textured metal substrate and pulsed laser deposition process. For improving the HTS wire performance, we used the laser slitting technology in order to obtain the 2 and 4mm narrow wires from 30mm wide wires in collaboration with ISTEC, Kyoto University and Kyusyu University. We confirmed excellent Ic performance for the narrow HTS coated conductors by using the laser slitting technology. We also investigated the technology for long-length, high-Je and low-cost manufacturing of the HTS wire.
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