Investigation of High Temperature Superconducting Linear ...
High-Temperature Superconducting Generators for Direct Drive Applications
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High-Temperature Superconducting Generators for Direct Drive Applications. [email protected] Institute for Energy Systems The University of Edinburgh. OZAN KEYSAN. April 2011. Superconductor?. Abolish the OHM’s Law. Zero Resistivity. Kakani2009. MERCURY. - PowerPoint PPT Presentation
Transcript of High-Temperature Superconducting Generators for Direct Drive Applications
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High-Temperature Superconducting Generators for Direct Drive Applications
OZAN [email protected] for Energy SystemsThe University of EdinburghApril 2011
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Superconductor?Abolish the OHMs LawKakani2009Zero Resistivity
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MERCURYThe First Superconductor Material Discovered in 1911Critical Temp = 4.2 K (-269 C)
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Other SuperconductorsLIQUID NITROGEN?? OH NO!Schiferl2006
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Infinite Current? Unfortunately NOT.www.superox.ru
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YBCO (YBa2Cu3O7 )Current Density > 200 A/mm2 (5-10 A/mm2 for copper)
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Perfect Diamagnetism
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Applications: MagLev Train
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Applications: Large Hadron ColliderSuperconducting Magnets Up to 16 T, Normal PM ~1.5 T
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Applications: MRI
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Power ApplicationsCourtesy AMSC, InnoPower SuperconductorTransmission LinesFault Current Limiter
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Power Applications : Electrical MachinesCourtesy of Siemens, Converteam (ALSTOM)Siemens: 400 kWConverteam (ALSTOM): 5 MW HTS
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Power Applications : Electrical Machines36.5 MW, 120 rpm (U.S. Navy, AMSC)Courtesy of AMSC
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Wind Turbine Applications?
M. Lesser, J. Mller, Superconductor Technology Generating the Future of Offshore Wind Power, BARD 5MW
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Direct-Drive Solutions
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Cost Comparison (HTSG vs. PMG)Lesser2009
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Types of HTS MachinesRotating DC Superconducting FieldMost Common TypeTransient Torques on HTS wireCryocooler Coupler + Brushes Low ReliabilityCooling TimesMagnetized Bulk HTSVery Difficult to HandleDemagnetizationAll Superconducting MachinesAC Losses on HTS wire
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Reliability?Stationary SC CoilNo Cryogenic CouplerNo BrushesNo Transient Torque on SCSimplified Cooling, IsolationDC FieldNo AC lossesMaximized Current
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Homopolar HTSG
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Homopolar HTSG
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Axial Bipolar HTS Machine
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Bonus: Bipolar Linear HTSGSuitable for WECs
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Transversal Flux HTSG
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Hasta la Vista!Thanks.
Larger Offshore Wind Turbines (>5MW)Gearboxes unfeasibleDirect DriveLow Speed High TorqueMore ReliableHigh Generator MassHigh Installation Cost
