A Homopolar HTSG Topology for Large Direct-Drive Wind Turbines


KEYSAN O. , Mueller M. A.

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, cilt.21, ss.3523-3531, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 21 Konu: 5
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1109/tasc.2011.2159005
  • Dergi Adı: IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
  • Sayfa Sayıları: ss.3523-3531

Özet

For offshore wind energy, there is a trend toward larger wind turbines. The increased mass of a power-takeoff system increases the installation cost of the turbine. Direct-drive superconducting generators have the potential to reduce the installation cost of wind turbines. For a successful entry to the off-shore-wind-energy market, a high-temperature superconducting generator should be as reliable as conventional generators. It is proposed that a stationary superconducting direct-current-field winding may increase the reliability of the generator. An axial-flux homopolar generator topology is proposed to be used in low-speed high-torque applications. The topology is modified by using two superconducting field windings to obtain a bipolar flux-density distribution for higher power density. Different core types and dimensions were examined to find the most suitable design, and a conceptual design of a 6-MW 12-r/min generator is presented.