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General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.
Users may download and print one copy of any publication from the public portal for the purpose of private study or research.
You may not further distribute the material or use it for any profit-making activity or commercial gain
You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.
Downloaded from orbit.dtu.dk on: Apr 13, 2022
Superconducting direct drive generators for large offshore wind turbines
Abrahamsen, Asger Bech; Jensen, Bogi Bech; Polinder, Henrik
Publication date:2013
Link back to DTU Orbit
Citation (APA):Abrahamsen, A. B. (Author), Jensen, B. B. (Author), & Polinder, H. (Author). (2013). Superconducting directdrive generators for large offshore wind turbines. Sound/Visual production (digital), European Wind EnergyAssociation (EWEA). http://www.ewea.org/annual2013/
Superconducting direct drive generators for large offshore wind turbines
Asger B. Abrahamsen1, Bogi Bech Jensen2 and Henk Polinder3
1Department of Wind Energy, DTU (DK) 2Department of Electrical Engineering, DTU (DK) 3Electrical Engineering, TU Delft, (NL) Battle of the drive trains EWEA 2013 4 February 2013, Vienna, Austria
DTU Wind Energy, Technical University of Denmark
Outline
• Motivation : An active material with new properties
Conclusion Why superconducting? • A new way of building machines with Bairgap higher than saturation of Iron • B > 1 Tesla → More compact for Multi-MW turbines with high torque • Very small / no dependence on Rare Earth element materials as in PM DD
Cost • NbTi: T = 4.2K Cost ~ 280 $/kW COE ~ 0.075 $/kWh • MgB2: T = 20 K Wire up scaling needed CAPEX % ~4-11 • YBCO: T = 20-40 K Wire upscaling & Price reduction CAPEX % ~40-50
Reliability • 20000 MRI systems using cryocoolers. Does it transfer to Wind energy? Efficiency • Similar to permanent magnet direct drive ~ 0.90 - 0.94 Serviceability • Redundancy of cryocoolers and compressors should provide a service interval of
1 year (MRI). Cold swap of cryocoolers by separate vacuum.
DTU Wind Energy, Technical University of Denmark
Roadmap to 5 GW SC wind power YBCO 130000 km tape 3000 km/year ↑ fCAPEX ~ 40-50% MgB2 350000 km tape 5000 km/year ↑ fCAPEX ~ 4-11% NbTi 360000 km tape 25000 km/year fCAPEX ~ 2% 6000 cryocoolers 1000 cryostats CAPEX << 1/3 OPEX ? 12 Abrahamsen and Jensen , "Wind Energy Conversion System:
Technology and Trend“, ISBN 978-1-4471-2200-5, Springer 2012.