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
Motivation
BARD 5MWGlobal Offshore Wind Energy Markets and Strategies,2009
In 2020, 85% of offshore wind turbine installations will be larger than 5 MW
Wind Turbines: Constantly Growing How big?
UpWind Project: A 20 MW Wind Turbine is Feasible
www.upwind.eu
Superconducting Machines
Courtesy of Siemens, Converteam (ALSTOM)
Siemens: 400 kW
Converteam (ALSTOM): 5 MW HTS
Power Applications : Electrical Machines
36.5 MW, 120 rpm (U.S. Navy, AMSC)
Courtesy of AMSC
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
Reliability of Wind Turbines
Hahn, B., & Durstewitz, M. (2007). Wind Energy-Reliability of Wind Turbines.
~1MW, 1500 onshore turbines
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
Transverse Flux HTSG
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
Linear Prototype
Next Stage A Superconducting
Field Winding Simple Insulation LN2 bath
Design for Large Wind Turbine 10 MW 10 rpm Mass/Cost
Estimation
THANKS