Feasibility study of 5MW superconducting wind turbine generator

Asger Bech Abrahamsen, Bogi Bech Jensen, E. Seiler, Nenad Mijatovic, Victor Manuel Rodriguez Zermeno, Niels Hessel Andersen, Jacob Østergaard

    Research output: Contribution to journalJournal articleResearchpeer-review


    The feasibility of installing a direct drive superconducting generator in the 5MW reference offshore wind turbine of the National Renewable Energy Laboratory (NREL) has been examined. The engineering current densities Je obtained in a series of race track coils have been combined with magnetization measurements to estimate the properties of suitable field coils for a synchronous generator, which is more light weight than the conventional used combination of a gear box and a fast rotating generator. An analytical model and finite element simulations have been used to estimate the active mass of generators with varying number of poles. A 24 pole machine with an outer diameter of 4.2m and active length and mass of 1.2m and 34 tons is suggested possible, if a Je=300A/mm2 can be obtained in B=4T pointing to an operation temperature around 40K.
    Original languageEnglish
    JournalPhysica C: Superconductivity and its Applications
    Issue number21-22
    Pages (from-to)1464-1469
    Publication statusPublished - 2011
    EventThe 23rd International Symposium on Superconductivity - Tsukuba, Japan
    Duration: 1 Nov 20103 Nov 2010
    Conference number: 23


    ConferenceThe 23rd International Symposium on Superconductivity


    • Superconducting generator
    • Offshore wind turbine
    • Race track coils


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