Scientific advances and innovation

  • Processing of statistical wind data obtained in non-controlled environments (wind + wave)
  • Correction laws and processing algorithms to more reliably assess the turbulence intensity with a floating LiDAR
  • Design of a full scale displacement system to reproduce floater motions (buoys or wind turbine floaters)

Expected technical and economic impact

Floating LiDAR is an accepted metrology for wind resource assessment of offshore wind energy projects under development and operation. It is also deployed on future floating wind farm projects, where no other instrumentation can be installed due to too important sea water depth. 10-min averaged wind speed and direction are the standard values extracted from the floating LiDAR measurements and are considered as reliable. This information is generally enough to assess the annual yield production, but prevents from assessing the wind turbine lifetime. Indeed, the structural fatigue is directly related to the wind speed fluctuations, primarily characterized by the turbulence intensity. The measurement error of the turbulence intensity obtained by floating LiDAR system and its dependency to the sea states (wave periods and specific heights, wind/wave direction, etc.) are not yet quantified, and the limit met-ocean conditions, beyond which measurement correction and/or motion compensation are needed, are not yet known.

MATILDA project aims at contributing to the collective effort from the scientific community working on offshore wind resource assessment by assessing and reducing the measurement error of turbulence intensity by floating LiDAR system through full scale data post-processing and analysis, and the design of a full scale test bench able to reproduce controlled floating LiDAR motions.

Key project milestones

  • Oct. 2019 - Project Kick-off
  • Jan. 2020 - Post-doc recruitment
  • Jan.-Mar. 2020 - Creation and exploitation of a measurement database to compare wind data from a meteorological mast and a fixed LiDAR profiler
  • Jan.-Oct. 2020 - Exploitation of a measurement database to compare wind data from a meteorological mast and a floating LiDAR profiler
  • Dec. 2020  - Correction laws for turbulence intensity measurements with fixed and floating LiDAR profilers
  • Dec. 2020 - Specifications of a full scale displacement system to reproduce floater motions
  • Dec. 2021  - Publications of results in high ranking scientific journals