Wind Energy Science (May 2017)

Lidar-based wake tracking for closed-loop wind farm control

  • S. Raach,
  • D. Schlipf,
  • P. W. Cheng

DOI
https://doi.org/10.5194/wes-2-257-2017
Journal volume & issue
Vol. 2
pp. 257 – 267

Abstract

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This work presents two advancements towards closed-loop wake redirection of a wind turbine. First, a model-based wake-tracking approach is presented, which uses a nacelle-based lidar system facing downwind to obtain information about the wake. The method uses a reduced-order wake model to track the wake. The wake tracking is demonstrated with lidar measurement data from an offshore campaign and with simulated lidar data from a simulation with the Simulator fOr Wind Farm Applications (SOWFA). Second, a controller for closed-loop wake steering is presented. It uses the wake-tracking information to set the yaw actuator of the wind turbine to redirect the wake to a desired position. Altogether, the two approaches enable a closed-loop wake redirection.