Posters
Come meet the poster presenters to ask them questions and discuss their work
We would like to invite you to come and see the posters at our upcoming conference. The posters will showcase a diverse range of research topics, and will give delegates an opportunity to engage with the authors and learn more about their work. Whether you are a seasoned researcher or simply curious about the latest developments in your field, we believe that the posters will offer something of interest to everyone. So please join us at the conference and take advantage of this opportunity to learn and engage with your peers in industry and the academic community.
PO125: Nacelle Lidar testing for next generation offshore wind turbines (15MW+)
Jens Riechert, Measurement Specialist, EnBW Energie Baden-Württemberg AG
Abstract
Over the last decades offshore wind turbines (WTGs) have become bigger and bigger resulting in installations of 15 MW machines with rotor diameters of 236m. There is currently no end to this trend foreseen and industry is expecting offshore WTGs with a capacity of 20+ MW by the end of the decade. The trend of ever-increasing offshore WTGs puts current methods for verifying the performance of these machines into question. Especially when it comes to warranty power curve testing the contract between the OEM and the operator often requires measurements at 2.5 rotor diameter, which can result in contractual measurement distance of up to 600m. Nacelle lidar technology is the current gold standard for wind measurements in offshore warranty power curve tests. However, contractual measurement distances of up to 600m are already at the edge of nowadays nacelle lidars capabilities. In this study we investigated the accuracy of two of the most relevant nacelle lidars in the European market, namely Vaisala its WindCube Nacelle (WCN) and ZX Lidars its ZX TM, at large measurement distances. The measurement campaign took place in autumn 2024 at DTU’s test site at Høvsøre, Denmark. The measurement setup comprises of one ZX TM, two WCN and a reference met mast. All nacelle lidars have been calibrated against the reference met. mast, following the line-of-sight (LOS) calibration protocol set forth in IEC 61400-50-3 Ed.1. For benchmarking the lidars accuracy at large distances, the systems were placed on different test pads ranging from 400 to 670m. The results of this study indicate a consistent performance of the WCN at 400 and 670m. The ZX TM installed at the 400m test pad shows slightly higher scatter. It was also noted that the mean deviation between the ZX and the reference met. mast increases with wind speed.
No recording available for this poster.
