Avent Lidar Technology has announced the public release of the first independently developed power curve measurement procedure for the new nacelle-mounted LIDARs, following a three year project.
The project has been conducted by a consortium made of DTU Wind Energy (formerly Risø Wind Energy Department), DONG Energy, Siemens Wind Power and Avent Lidar Technology, and funded by the Danish Energy Technology Development and Demonstration Program (EUDP). The procedure provides the basis for a new, industry-wide best-practice for performance verification with nacelle LIDARs. It has been submitted to the expert and standardization groups Measnet and IEA Task 32 in order to be upgraded to an internationally recognized standard. The project started from the basis of a ground-based Windcube Lidar from Leosphere, which was adapted to be placed on the turbine nacelle for forward looking horizontal measurements. Over the course of the project, several prototypes were developed and tested, and have evolved into a new product called Wind Iris, which integrates all the elements of the procedure. One of the main challenges was to obtain an equivalent procedure to the IEC 61400-12-1 power performance measurement standard. To achieve the required level of accuracy and repeatability, the developed procedure accounts for each one of the measurement requirements.