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R&D status of HTS wires and their applications in Japan

IEA ExCo Hanau. Nov.3 2011. R&D status of HTS wires and their applications in Japan. O. Tsukamoto Yokohama National University N. Kusunose NEDO. Contents. 1. HTS wires - BSCCO (Sumitomo) - Long length CC (ISTERA Project) TEPCO/Sumitomo Asahi cable project.

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R&D status of HTS wires and their applications in Japan

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  1. IEA ExCo Hanau. Nov.3 2011 R&D status of HTS wires and their applications in Japan O. Tsukamoto Yokohama National University N. Kusunose NEDO Contents • 1. HTS wires • - BSCCO (Sumitomo) • - Long length CC (ISTERA Project) • TEPCO/Sumitomo Asahi cable project

  2. DI-BSCCO wires and magnets for industrial applications Sumitomo Electric Industries, Ltd. 2

  3. Current R&D status of DI-BSCCO wires • Critical Current, Ic • The highest, Ic, for the short R&D wire has recently achieved 250 A (@ 77K, s.f). • Critical Current Density, Jc • The highest critical current density, Jc, reached 7.7 x 104 A/cm2, • corresponding to 600 A/cm-width. 3 3

  4. Improving In-Field properties R&D wire Ic=240A at 77K, s.f 4

  5. Magnet Design - 1 5

  6. Magnet Design - 2 6

  7. Appearance of DI-BSCCO Magnet DI-BSCCO Coil Cryocoolers 100mm Bore Power Supply 7

  8. AC Loss Evaluation of the coil 8

  9. Conclusions DI-BSCCO wires have steadily been improved. Highest Ic of 250 A at 77K was achieved. The better Ic leads the higher performance of coils or magnets. Higher speed excitation and quench-less operation are needed for industrial applications. DI-BSCCO magnet for B-H curve tracer was successfully designed and manufactured, and proved to have good performance such as high speed excitations and quench-less operations. 9

  10. Cu Alloy (CA) or Stainless Steel (SS) Type H Solder Bath Cu Alloy (CA) or Stainless Steel (SS) Assembly process of DI-BSCCO Type HT Assembly process (Lamination) Bare wire (Type H) DI-BSCCO ® Type HT DI-BSCCO® Type H Reinforced with SS SS Type HT SS DI-BSCCO® Type HT with SS Reinforced with Cu-alloy Cu-alloy Cu-alloy DI-BSCCO® Type HT with Cu-alloy Transverse cross-sectional area of Type H and Type HT Type HT (High critical current and Tough) has high mechanical strength due to laminating Type H with reinforcements. 10

  11. Lineup of DI-BSCCO Type HT Reinforced tapes with metallic lamination http://www.sei.co.jp/super/ Type HT-SS Type HT-CA Good for cables • Type HT-CA • Uniform Ic from end to end • Higher tensile tolerance • > 250MPa (77K) • 50 mm thick copper alloy tapes • Lower splice resistance Good for high field magnets • Type HT-SS • Uniform Ic from end to end • Highest tensile tolerance >270MPa (77K) • Thinner (20 mm-thick) stainless steel tapes (Higher Je) 11 11

  12. R&D for Higher Strength Wire TypeHT (ss100) TypeHT (ss80) TypeHT (ss50) TypeHT (ss20) DI-BSCCO TypeHT wire with stainless steel tapes

  13. Outline of the project Outline of the project (ISTERA) Research target To develop the manufacturing process which can produce over 1km-long HTS wire with Ic≧300A/cm-width (@77K, Self field) Target property to achieve ・1km-long sample:Ave. Ic≧200A/cm-width (@77K Self field) ・Over 10m-long sample with developed manufacturing process : Ave. Ic≧300A/cm-width (@77K Self field) The Approach to the target Measurement technology for long wire TFA-MOD process Excimer Laser PLD process

  14. The result of Excimer Laser PLD process Very long and very high Ic wire has been produced Over 1km-long continuous deposition （GdBCO/IBAD-MgO) 1km YBCO （Base metal has 1 connection） 600 400 200 0 100m&>400A Hole effect devise method Ave.=534A/cm-w Ic (A/cm-width) 4-pole method （short section) Achieve the target Target 0 200 400 600 800 1000 Length (m)

  15. The result of TFA-MOD process Very long wire has been produced (TFA-MOD ) Over 1km-long deposition （YBCO/IBAD-MgO) The earthquake of March 11 caused re-make of 1km-long TFA-MOD sample with patch like coating Base Material 500 Ave. Ic≧300A/cm-width HTS Multi layer 400 300 Critical Current (A/cm-width) 200 Achieve the target Target 100 @77K, Self field 0 0 200 400 600 800 1000 Length (m)

  16. Power Cable (3 Core in 1 Cryostat) 16 Cu former （core, stabilizer） Superconductor （Conductor） ＰＰＬＰR （Insulation） Superconductor （magnetic shield） Cu（stabilizer） Double corrugated pipe （vacuum） Liquid nitrogen Super insulation 3 phase (core) In one cryostat

  17. Yokohama Project 17 Tokyo Site • First ‘in real-grid’ HTS Cable demonstration in Japan • Site : Asahi S/S, Yokohama, TEPCO’s power network • 66kV - 2kA - 200MVA class HTS cable with 1G DI-BSCCO wire • Compact 3-in-One cable design for 150mm conduit • 200 ~ 300 meter long, terminations & joint

  18. Yokohama HTS Cable Project - Installation at Asahi Substation ~250 meter HTS cable Joint Return Supply Trans 154/66 kV 200 MVA Cooling system house Site office Monitoring house Existing 66 kV XLPE cable Terminations CB2 CB1 Existing 66 kV bus line LS2 LS1 LS3 CH CB 18

  19. Yokohama HTS Cable Project - Schedule • Start of the long term test will be delayed for 1 year due to the influence of the east Japan great earthquake on 11th March. • We are considering to extend the project term for 1 year to complete the project’s target. 19

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