Full-State Feedback Control of a Variable-Speed Wind Turbine: A Comparison of Periodic and Constant Gains Academic Article uri icon


  • An investigation of the performance of a model-based periodic gain controller is presented for a two-bladed, variable-speed, horizontal-axis wind turbine. Performance is based on speed regulation using full-span collective blade pitch. The turbine is modeled with five degrees-of-freedom; tower fore-aft bending, nacelle yaw, rotor position, and flapwise bending of each blade. An attempt is made to quantify what model degrees-of-freedom make the system most periodic, using Floquet modal properties. This justifies the inclusion of yaw motion in the model. Optimal control ideas are adopted in the design of both periodic and constant gain full-state feedback controllers, based on a linearized periodic model. Upon comparison, no significant difference in performance is observed between the two types of control in speed regulation.

published proceedings

  • Journal of Solar Energy Engineering

author list (cited authors)

  • Stol, K., & Balas, M.

citation count

  • 40

complete list of authors

  • Stol, Karl||Balas, Mark

publication date

  • November 2001