superconducting generators for large wind turbines ozan keysan [email protected] institute for...
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Superconducting Generators for Large Wind Turbines
Ozan Keysan
[email protected] for Energy SystemsThe University of Edinburgh
26/09/2012
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Motivation
BARD 5MWGlobal Offshore Wind Energy Markets and Strategies,2009
In 2020, 85% of offshore wind turbine installations will be larger than 5 MW
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Wind Turbines: Constantly Growing How big?
UpWind Project: A 20 MW Wind Turbine is Feasible
www.upwind.eu
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Superconducting Machines
Courtesy of Siemens, Converteam (ALSTOM)
Siemens: 400 kW
Converteam (ALSTOM): 5 MW HTS
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Power Applications : Electrical Machines
36.5 MW, 120 rpm (U.S. Navy, AMSC)
Courtesy of AMSC
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Mass of Direct-Drive Generators
Harakosan 1.5MW,18 rpm,47 tonnes
(*) D. Bang et.al. “Review of Generator Systems for Direct-Drive Wind Turbines,” 2008,
All data available at goo.gl/ZZivv
Enercon4.5 MW, 13 rpm220 tonnes
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Reliability of Wind Turbines
Hahn, B., & Durstewitz, M. (2007). Wind Energy-Reliability of Wind Turbines.
~1MW, 1500 onshore turbines
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Reliability?
Cooling System Cryogenic Couplers Electric Brushes Transient torques on
SC Demagnetization for
Bulk SC AC losses on SC wire
Issues with Superconducting GeneratorsSeaTitan
AMSC, 10 MW, 10 rpm
Direct-drive superconducting generator
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Transverse Flux HTSG
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Pros Single Stationary SC Coil No Brushes No Cryogenic Coupler Bidirectional flux High Torque Density
Cons Magnetic Attraction
Forces 3D Flux (Soft magnetic
composites needed)
Transverse Flux HTSG
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Linear Prototype
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Next Stage A Superconducting
Field Winding Simple Insulation LN2 bath
Design for Large Wind Turbine 10 MW 10 rpm Mass/Cost
Estimation
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THANKS