Posters

Abstract

A measurement campaign with a variety of lidar measurement devices was conducted in the summer of 2022 in an operating wind farm. Three different types of lidar technologies were used. 4 scanning lidars (WLS200S and a Streamline), 3 profiling lidars (Windcube V1, V2 and a ZX300) and a nacelle-mounted lidar (Wind Iris) were set up in the wind farm. While profiling lidars are bankable and commonly used, nacelle-mounted lidars just received their admission to the IEC standard in 2022. Especially in Europe the use of scanning lidars is until today mostly limited to research applications. This measurement campaign was carried out as part of the three-year projects Window (Development of a lidar- and AI-based method for the large-scale measurement of the wind field within and outside of offshore wind farms) and LoTar. The majority of the lidars were set up for 4 month in and around the operating wind farm. The motivation to use such a variety of measurement instruments were manifold. The focus of this contribution lies in the preparation and realization of the scanning lidar measurements. In this campaign scanners were used to test an adaptive control for synchronized line-of-sight (LOS) measurements. A software developed by Fraunhofer IEE enables to configure and control such campaigns. This feature can be used to facilitate power performance and wake analysis, because measurement points are adjusted based on the prevailing wind direction. However, the planning of such a campaign is more complex compared to a standard campaign and necessary steps are explained in this contribution. Besides the test of function for the adaptive control a comparison PPI scan covering the same area was made with two other scanning lidars. The profilers, nacelle-mounted lidar and met mast serve as reference measurements and comparisons between each other in regard to turbulence are made.