Multiple offshore
wind turbine wake
picture produced
by SWE using
Galion Lidar
23 January 2013 – SgurrEnergy’s 2nd generation wind Lidar, the Galion, has produced the first image of multiple offshore wind turbine wakes ever captured by a scanning Lidar device. The unique image was revealed by the wind Lidar research group at the Stuttgart Wind Energy department (SWE) at Stuttgart University in Germany, which is using SgurrEnergy’s Galion Lidar in a ground-breaking offshore wind energy research campaign being conducted at the Baltic-1 wind farm in the German Baltic Sea.

The campaign, run by SWE and funded by the German national environment department, aims to learn about controlling and improving offshore wind farms’ efficiency and availability and the durability of their wind turbine generators (WTGs).

It is the first time an entire offshore wind farm has been observed simultaneously by SCADA, long range Lidar and load measurements on certain selected WTGs. This will allow measurements of the wind resource and the WTGs’ wakes and loads to be directly related to each other, something that has previously never been done in the industry.

To conduct this research, SWE is using a G4000 offshore Galion wind Lidar, pioneered by renewable energy consultancy SgurrEnergy. The Galion is providing essential data on WTG wakes, park wakes and wind profiles, which are dependent on water temperature and air layering.

Peter Clive, technical development officer, at SgurrEnergy, says, “Our Galion Lidar has produced one of the first direct measurements of the full extent of wakes of offshore WTGs as opposed to indirect measurements obtained via model approximations and production deficit figures. This has huge implications for the wind energy industry. The use of the scanning capabilities of 2ndgeneration Lidar will allow a greater understanding of the effects of wind on WTGs, more so than traditional met mast technology. The data from these scans can be used to enhance wind flow models and allow more accurate predictions. Why model the wind flow across a wind farm when we can simply measure it? Now that we have the tools and techniques to answer key questions about offshore wind conditions, and acquire project critical information, we no longer have any excuse to persist with obsolete rules of thumb and approximations that have prevailed in the industry until now.”

The use of SgurrEnergy’s Galion on the Baltic-I offshore wind energy research campaign will continue until August 2013, with the entire project coming to completion in 2014.