LEOSPHERE, the world leader in LiDAR technology, has announced the validation of its patented Flow Complexity Recognition (FCR) system upgrade to deliver wind measurement data of superior accuracy on complex wind sites. The strong performance of the FCR-upgraded WINDCUBE V2 LiDAR was field-tested and validated by DTU, on ERS` 48 MW wind farm located in Bosnia & Herzegovina.

Alexandre Sauvage, LEOSPHERE CEO, explained: “Until now, traditional LiDARs weren`t able to measure the wind speed in complex terrain with sufficient accuracy because the wind speed is not horizontally homogeneous. LEOSPHERE`s Flow Complexity Recognition (FCR) upgrade is the only innovative solution on the market to fix this issue. The FCR technology is essentially an online correction system which can be paired with our WINDCUBE V2 LiDAR. Thanks to the unique fifth vertical beam, it accounts for the impact of the terrain complexity on the measurements. The FCR upgrade combines hardware and software innovations to enable our WINDCUBE V2 LiDAR to reach a measurement difference of only 1.5% compared to met mast based measurements”.

The Hrgud wind farm, chosen for the field validation testing, is a turbulent and complex wind site, located on an oblong 100m high hill about 1.5km North of a 1000m deep and 2000m wide canyon. In this field test, a 77.5m reference met mast was erected and instrumented by COWI to perform the wind resource assessment as part of a larger feasibility study for ERS, the wind farm owner. A WINDCUBE V2 LiDAR was installed next to the met mast in order to provide an additional set of wind data and establish a LiDAR/Met Mast comparison. This measurement campaign, led by DTU, was conducted with both the regular WINDCUBE LiDAR, and the FCR-upgraded machine. The results showed that the use of the FCR option on the WINDCUBE has led to a reduction of the measurement bias from -4.1% to +1.5% compared to the cup anemometer met mast. The greater accuracy of the results is in line with other FCR field tests.

“Until now, in both complex terrain and complex flow situations, all remote sensors on the market have shown a measurement bias due to the lack of flow homogeneity across the measured volume. With our FCR option, we offer a product that significantly reduces this bias. The WINDCUBE V2 provides direct and accurate wind measurements on complex terrain, thereby eliminating the need for CFD-based post-processing or post-correction of data, and saving time and money for project developers”, continued Alexandre Sauvage.
This measurement campaign proves the unmatched accuracy of the WINDCUBE v2 whatever the terrain configuration, flat or complex. Wind energy developers can use this light, ultra-portable and easy-to-move remote sensor with ease and confidence at all sites for bankable wind measurements, whether in simple or complex terrain.

About LEOSPHERELEOSPHERE, founded in 2004, and its subsidiary AVENT Lidar Technology are world leaders in ground-based and nacelle-mounted LIDAR (Light Detection and Ranging) for atmospheric observation. The companies design, develop, manufacture, sell and service new turnkey remote-sensing instruments allowing wind measurement and aerosol characterization. LEOSPHERE has deployed hundreds of LIDARs throughout the world in severe environments. www.leosphere.com

About DTU Wind Energy
DTU Wind Energy is part of the technical university of Denmark. The overall objectives of the wind energy department are to maintain and further develop Denmark as a leading knowledge and development centre for wind energy and to support and develop the wind energy sector though research, innovation, education and research-based consultancy. The test and measurement section focuses its research on the development of instrumentation and new methods for experimental determination of wind turbine characteristics, including test methods for the wind turbine industry. Special efforts are focused on remote sensing techniques using wind lidars. The section represents expertise in organising and conducting field meteorological measurements (wind resources and siting, boundary-layer meteorology, turbulence and aero-elastic design). Research results are applied in international standards and also in national and international projects. www.vindenergi.dtu.dk

About COWI
COWI is a leading consulting company that creates value for customers, people and society through our unique 360° approach. Within wind energy COWI is part of the Danish wind industry to which we contributed as cofounders of MEASNET, and we have more than three decades of experience with accredited wind measurements. The wind department provides measurements, wind resource studies, feasibility studies, second opinion statements, accredited power curve measurements, wind turbine design documentation for approval, tender documentation for projects, due diligence of wind projects for financing, wind turbine foundation design, electrical design, construction supervision and Owners Engineering. Based on our world-class competencies within engineering, economics and environmental science, we have created valuefor our customers in more than 600 wind projects all over the world – and always with the highest level of technological know-how. http://www.cowi.com/