成果報告書詳細
管理番号20120000000191
タイトル*平成22年度中間年報 イットリウム系超電導電力機器技術開発 大電流超電導ケーブル技術開発 機器用線材製作・開発
公開日2012/4/28
報告書年度2010 - 2010
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
[1]「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
・150mm 管路に収納可能な大電流・低交流損失ケーブルの構造設計を行った。設計をもとに、5kA 級のケーブルコアサンプルを作製し、交流損失2W/m-相@5kA を検証した。
(b) 大容量接続技術の開発
・上記のケーブルコアサンプルを用いて5kA の連続通電を行い、熱的な安定状態が得られることを確認した。
(c) 三心一括ケーブル導体の検証
・早稲田大学の短絡電流通過時電磁力シミュレータを用いて、ケーブルを構成する各線材にかかる電磁力の評価を行った。ISTEC にて本電磁力に対する剥離機械試験を実施した結果、想定される電磁力と比較して3 桁程度大きい機械特性を有していることを確認し、要求特性を満足することを確認した。
英文要約Title : Technological Development of Yttrium-based Superconducting Power Equipment (FY2008-2011) FY2010 Annual Report

The HTS cable which can be installed into 150 mm conduit was designed. A cable sample was manufactured, and the measured AC loss was less than the target value of 2 W/m/ph at 5 kA. The 5 kA-current-loading tests were conducted for the cable sample, and it was confirmed that the cable sample has enough capacity for 5 kA. The electromagnetic forces acting on the HTS wires in cables were numerically evaluated on the fault condition (31.5 kA, 2sec). The measured delamination strength of the HTS wires was larger in about 3 orders magnitude than the expected one at the numerically calculated maximum electromagnetic force. It was confirmed that the wires have enough mechanical strength against fault current. The 15-m-long verification cable system was designed, and the plan of a long-term operation test was drawn up in order to verify whether the cable system is able to transmit the rated power for 30 years.

In manufacturing the HTS conductor for power cable application, we focused on R&D in the following articles. The first article is the development of stable wire production technology for large current use. We developed stable PLD condition on 3cm wide clad-type textured metal substrate. We have confirmed the stable production of 20m-long HTS conductor with Je over 15kA/cm2. HTS conductor of 4km with 1cm-width was produced and supplied for cable R&D. The second article is the investigation of characteristics of the conductor. We have found the endurance test condition for the HTS conductor for the high current power cable with ISTEC and Waseda University. The third article is the development of uniform wire production technology. We developed the PLD condition for high Ic superconductor, and improved the roughness of the buffer layer. Ic over 300A/cm was confirmed for the 50m-long and HTS conductor.
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