Optimization and comparison of superconducting generator topologies for a 10 MW wind turbine application
Issue title: Special Supplement Issue: Selected papers from the 13th International Workshop on Optimization and Inverse Problems in Electromagnetism (OIPE 2014)
Affiliations: [a] Electrical Sustainable Energy Department, Delft University of Technology, Delft, The Netherlands | [b] DTU Wind Energy, Technical University of Denmark, Roskilde, Denmark | [c] DNV-GL, Silverthorne Lane St Vincent's Works, BS2 ODQ Bristol, UK | [d] SINTEF Energy Research, 7465 Trondheim, Norway
Correspondence:
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Corresponding author: Dong Liu, Electrical Sustainable Energy Department, Delft University of Technology, Mekelweg 4, 2628 CD Delft, The Netherlands. Tel.: +31 152789849; Fax: +31 152782968; E-mail:d.liu-1@tudelft.nl
Abstract: A direct-drive superconducting generator (DDSCG) is proposed for 10 MW wind turbines in the INNWIND.EU project. To fit the generator into the ``king-pin'' conceptual nacelle design, the generator structure with inner stationary superconducting (SC) field winding and outer rotating copper armature winding is investigated in the first research phase. Since the cost is an important performance indicator for this application, this paper presents a method to minimize the active material cost of the ``king-pin'' fitted DDSCG. In this method a relatively fast optimization program is developed with 2D non-linear finite element models. By implementing this method, three typical superconducting generator topologies are compared in terms of the active material cost and mass, the synchronous reactance and the phase resistance. The optimization method and the comparison results provide the DDSCG designers with a guideline for selecting a suitable machine topology.
