Comparison of MgB2 and Coated Conductor Based 5 MW Superconducting Wind Turbine Generator

Asger Bech Abrahamsen, Bogi Bech Jensen

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearchpeer-review

Abstract

Direct drive superconducting generators might become attractive in large offshore wind turbines, because the drive train must provide a torque scaling with the radius of the rotor blades as R3 due to limitation of the tip speed of the blades. We have previously found that a coated conductor based generator can technically compete with a gear box drive train equivalent to the 5 MW NREL reference turbine [1]. However the price of the coated conductor results in a generator price exceeding the expected price of the entire turbine. MgB2 conductors can be seen as a low cost alternative to the coated conductors, but the operation temperature in range of T = 15-20 K and the engineering current density Je is smaller. We have found that a 16 pole synchronous generator with active diameter D = 4.2 m and length L = 1.5 m based on a MgB2 wire with Je = 70 A/mm2 in approximately 4 Tesla field would result in a wire usage in the order of 330 km. This has the potential to decrease the price of the superconductor wires in the generator by a factor of 10 compared to the coated conductors, but the cryogenics will be a challenge and is discussed. Finally we will use turbine load simulations to discuss the torque events that such a 5 MW generator would experience if installed in the NREL turbine.
Original languageEnglish
Title of host publicationConference program book - 2012 Applied Superconductivity Conference (ASC 2012)
Publication date2012
Pages887-887
Publication statusPublished - 2012
Event 2012 Applied Superconductivity Conference - Oregon Convention Center, Portland, OR, United States
Duration: 7 Oct 201212 Oct 2012

Conference

Conference 2012 Applied Superconductivity Conference
LocationOregon Convention Center
CountryUnited States
CityPortland, OR
Period07/10/201212/10/2012

Cite this

Abrahamsen, A. B., & Jensen, B. B. (2012). Comparison of MgB2 and Coated Conductor Based 5 MW Superconducting Wind Turbine Generator. In Conference program book - 2012 Applied Superconductivity Conference (ASC 2012) (pp. 887-887)
Abrahamsen, Asger Bech ; Jensen, Bogi Bech. / Comparison of MgB2 and Coated Conductor Based 5 MW Superconducting Wind Turbine Generator. Conference program book - 2012 Applied Superconductivity Conference (ASC 2012). 2012. pp. 887-887
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Abrahamsen, AB & Jensen, BB 2012, Comparison of MgB2 and Coated Conductor Based 5 MW Superconducting Wind Turbine Generator. in Conference program book - 2012 Applied Superconductivity Conference (ASC 2012). pp. 887-887, 2012 Applied Superconductivity Conference, Portland, OR, United States, 07/10/2012.

Comparison of MgB2 and Coated Conductor Based 5 MW Superconducting Wind Turbine Generator. / Abrahamsen, Asger Bech; Jensen, Bogi Bech.

Conference program book - 2012 Applied Superconductivity Conference (ASC 2012). 2012. p. 887-887.

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearchpeer-review

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Abrahamsen AB, Jensen BB. Comparison of MgB2 and Coated Conductor Based 5 MW Superconducting Wind Turbine Generator. In Conference program book - 2012 Applied Superconductivity Conference (ASC 2012). 2012. p. 887-887