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High-Temperature Superconducting Generators
- 1. High-Temperature Superconducting Generators for Direct Drive Applications OZAN KEYSAN [email_address] Institute for Energy Systems The University of Edinburgh April 2011
- 2. Superconductor? Abolish the OHM’s Law Kakani2009 Zero Resistivity
- 3. MERCURY The First Superconductor Material Discovered in 1911 Critical Temp = 4.2 K (-269 C)
- 4. Infinite Current? Unfortunately NOT. www.superox.ru
- 5. YBCO (YBa 2 Cu 3 O 7 ) Current Density > 200 A/mm2 (5-10 A/mm2 for copper)
- 8. Applications: Large Hadron Collider Superconducting Magnets Up to 16 T, Normal PM ~1.5 T
- 10. Power Applications Courtesy AMSC, InnoPower Superconductor Transmission Lines Fault Current Limiter
- 11. Power Applications : Electrical Machines Courtesy of Siemens, Converteam (ALSTOM) Siemens: 400 kW Converteam (ALSTOM): 5 MW HTS
- 12. Power Applications : Electrical Machines 36.5 MW, 120 rpm (U.S. Navy, AMSC) Courtesy of AMSC
- 13. Wind Turbine Applications? M. Lesser, J. Müller, “Superconductor Technology – Generating the Future of Offshore Wind Power,” BARD 5MW
- 14. Direct-Drive Solutions EESM: Electrically excited Synchronous Machine HTSG: High-Temperature Superconducting Generator PMG: Permanent-Magnet Generator Bubble Size: Power Rating
- 15. Cost Comparison (HTSG vs. PMG) Lesser2009
- 16. 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
- 17. Reliability? Stationary SC Coil No Cryogenic Coupler No Brushes No Transient Torque on SC Simplified Cooling, Isolation DC Field No AC losses Maximized Current
- 18. Homopolar HTSG
- 19. Homopolar HTSG
- 20. Axial Bipolar HTS Machine
- 21. Bonus: Bipolar Linear HTSG Suitable for WECs
- 23. Thanks. OZAN KEYSAN [email_address] www.see.ed.ac.uk/~okeysan
Editor's Notes
- #14: Larger Offshore Wind Turbines (>5MW) Gearboxes unfeasible Direct Drive Low Speed – High Torque More Reliable High Generator Mass High Installation Cost