Leosphere, a leader in LiDAR technology, has announced today 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.
“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,” said Alexandre Sauvage, Leosphere CEO. “Leosphere’s Flow Complexity Recognition 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 1.5 km north of a 1,000m deep and 2,000m 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,” said Sauvage. “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.”
This measurement campaign proves the accuracy of the Windcube v2 whatever the terrain configuration, flat or complex.
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