通过LIDAR技术测量海上风电场性能

Offshore wind farms are becoming increasingly larger and their turbines are reaching higher into the sky. New knowledge is needed to understand how wind behaves at these altitudes and the forces it exerts on the rotor blades. ECN part of TNO and partners from science and industry have conducted studies into the reliability of Lidar for measuring wind characteristics.

传统的风测量是借助连接仪器的风桅杆进行的。ECN tno的一部分has a test field in the Wieringermeer, the Netherlands, comprising such wind masts equipped with various measurement and calibration devices. However, conducting measurements at sea is costly and cumbersome. Lidar (light detection and ranging) devices are small enough to be installed on existing survey masts, in turbine nacelles and even on floats on the water.

LIDARfor reliable offshore wind farm measurements

迄今为止，与传统测量相比，这种相对较新的测量风的可靠性尚未得到彻底的测试。在四年的时间里，与Tu Delft合作进行了测试和测量XEMC Darwind(a Dutch manufacturer of wind turbines) and左骨（法国的LIDAR设备供应商）作为一部分LAWINE research project(Lidar application for wind energy efficiency). A grant was provided through the Energy Top Sector’s Offshore Wind TKI by the Netherlands’ Ministry of Economic Affairs.

同样的精度

第一个测量是使用附着在调查桅杆上（由前ECN安装）的激光雷达设备在Ijmuiden海岸进行的，该设备还配备了传统的测量仪器。这使得可以轻松比较两种测量方法的结果。测试表明，LIDAR至少具有与常规测量设备相同的精度。广泛的进一步测试显示了LiDAR技术的其他好处：它可以安装在许多不同的位置（可以收集更广泛的测量数据），并且与使用传统方法相比，设备和安装成本更便宜。

Optimizing wind farm performance

A total of eight different applications of Lidar were tested and validated, producing a wealth of data that has enriched the models of ECN part of TNO. Lidar can record more points in space and time, allowing for much more accurate analyses of the correlations between wind and turbine loads. With the help of Lidar surveys, it will be easier to substantiate the choice of a wind farm location and to optimize the performance of the turbines.

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