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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. April 2011. Superconductor?. Abolish the OHM’s Law. Zero Resistivity. Kakani2009. MERCURY.

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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 April 2011

  2. Superconductor? • Abolish the OHM’s Law Zero Resistivity Kakani2009

  3. MERCURY • The First Superconductor Material • Discovered in 1911 • Critical Temp = 4.2 K (-269 C)

  4. Other Superconductors LIQUID NITROGEN?? OH NO! Schiferl2006

  5. Infinite Current? Unfortunately NOT. www.superox.ru

  6. YBCO (YBa2Cu3O7 ) Current Density > 200 A/mm2 (5-10 A/mm2 for copper)

  7. Perfect Diamagnetism

  8. Applications: MagLev Train

  9. Applications: Large Hadron Collider • Superconducting Magnets • Up to 16 T, Normal PM ~1.5 T

  10. Applications: MRI

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

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

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

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

  15. Direct-Drive Solutions

  16. Cost Comparison (HTSG vs. PMG) Lesser2009

  17. 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

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

  19. Homopolar HTSG

  20. Homopolar HTSG

  21. Axial Bipolar HTS Machine

  22. Bonus: Bipolar Linear HTSG • Suitable for WECs

  23. Transversal Flux HTSG

  24. Hasta la Vista! Thanks.

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