high-temperature superconducting generators for direct drive applications
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High-Temperature Superconducting Generators for
Direct Drive ApplicationsOZAN KEYSANo.keysan@ed.ac.ukInstitute for Energy
SystemsThe University of
EdinburghMay 2011
Ozan KEYSAN o.keysan@ed.ac.uk 2
Power Applications
Courtesy AMSC, InnoPower Superconductor
Transmission Lines Fault Current Limiter
Ozan KEYSAN o.keysan@ed.ac.uk 3
Power Applications : Electrical Machines
Courtesy of Siemens, Converteam (ALSTOM)
Siemens: 400 kW
Converteam (ALSTOM): 5 MW HTS
Ozan KEYSAN o.keysan@ed.ac.uk 4
Power Applications : Electrical Machines
36.5 MW, 120 rpm (U.S. Navy, AMSC)
Courtesy of AMSC
Ozan KEYSAN o.keysan@ed.ac.uk 5
Wind Turbine Applications?
M. Lesser, J. Müller, “Superconductor Technology – Generating the Future of Offshore Wind Power,” BARD 5MW
Ozan KEYSAN o.keysan@ed.ac.uk 6
Direct-Drive Solutions
Ozan KEYSAN o.keysan@ed.ac.uk 7
Cost Comparison (HTSG vs. PMG)
Lesser2009
Ozan KEYSAN o.keysan@ed.ac.uk 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
Ozan KEYSAN o.keysan@ed.ac.uk 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
Ozan KEYSAN o.keysan@ed.ac.uk 10
Homopolar HTSG
Ozan KEYSAN o.keysan@ed.ac.uk 11
Homopolar HTSG
Ozan KEYSAN o.keysan@ed.ac.uk 12
Axial Bipolar HTS Machine
Ozan KEYSAN o.keysan@ed.ac.uk 13
Bonus: Bipolar Linear HTSG Suitable for WECs
Ozan KEYSAN o.keysan@ed.ac.uk 14
Transversal Flux HTSG
Claw PoleRotor
Superconducting Coil (Field)
Fixed Structure
Copper Coil (Armature)
Current Direction
Moving Part
x
Ozan KEYSAN o.keysan@ed.ac.uk 15
Prototype < 1m Diameter 250 rpm 5 kW
Ozan KEYSAN o.keysan@ed.ac.uk 16
SC Winding – Cryocooler 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.
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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