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High-Temperature Superconducting Generators for Direct Drive Applications

High-Temperature Superconducting Generators for Direct Drive Applications. o.keysan@ed.ac.uk Institute for Energy Systems The University of Edinburgh. OZAN KEYSAN. May 2011. Power Applications. Fault Current Limiter. Transmission Lines. Courtesy AMSC, InnoPower Superconductor.

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High-Temperature Superconducting Generators for Direct Drive Applications

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  1. High-Temperature Superconducting Generators for Direct Drive Applications o.keysan@ed.ac.uk Institute for Energy Systems The University of Edinburgh OZAN KEYSAN May 2011

  2. Power Applications • Fault Current Limiter • Transmission Lines Courtesy AMSC, InnoPower Superconductor

  3. Power Applications : Electrical Machines • Converteam (ALSTOM): 5 MW HTS • Siemens: 400 kW Courtesy of Siemens, Converteam (ALSTOM)

  4. Power Applications : Electrical Machines • 36.5 MW, 120 rpm (U.S. Navy, AMSC) Courtesy of AMSC

  5. Wind Turbine Applications? BARD 5MW M. Lesser, J. Müller, “Superconductor Technology – Generating the Future of Offshore Wind Power,”

  6. Direct-Drive Solutions

  7. Cost Comparison (HTSG vs. PMG) Lesser2009

  8. Types of HTS Machines • Rotating DC Superconducting Field • Most Common Type • Transient Torques on HTS wire • Cryocooler Coupler + Brushes  Low Reliability • Cooling Times • Magnetized Bulk HTS • Very Difficult to Handle • Demagnetization • All Superconducting Machines • AC Losses on HTS wire

  9. Reliability? • Stationary SC Coil • No Cryogenic Coupler • No Brushes • No Transient Torque on SC • Simplified Cooling, Isolation • DC Field • No AC losses • Maximized Current

  10. Homopolar HTSG

  11. Homopolar HTSG

  12. Axial Bipolar HTS Machine

  13. Bonus: Bipolar Linear HTSG • Suitable for WECs

  14. Transversal Flux HTSG

  15. < 1m Diameter 250 rpm 5 kW Prototype

  16. Inner Diameter:300mm Outer Diameter:400mm 125m YBCO Wire (0.1x12 mm) Excited with DC Source Liquid Nitrogen Cooled (maybe Neon) Similar cooling system to homopolar HTS motors. SC Winding – Cryocooler T. Zhang, K.Haran, E.T. Laskaris,J.W. Bray, “Design and Test of a Simplified and Reliable Cooling System for High Speed Superconducting Generator Applications,”

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