TotalEnergies commissions Fraunhofer IWES with extensive offshore measurement campaign
How accurate are wind measurements from dual-Doppler scanning lidar systems? And what is their potential for offshore wind energy? Fraunhofer IWES is investigating these questions together with Oldbaum Services Ltd and TotalEnergies through two concurrent measurement campaigns in Great Britain and Japan.
With dual-Doppler scanning lidar technology, two measuring devices are operated synchronously at different onshore locations. They are aligned in such a way that the laser beams cross at a point up to 10 kilometers off the coast – at a typical wind turbine hub height – returning, potentially, highly accurate information on wind conditions. To prove this, two measurement campaigns started to compare these data to offshore met mast measurements in order to evaluate the technology´s performance. As well as wind speed accuracy, the comparison of the measurement methods could even reveal advantages in the area of turbulence measurement.
Lidar systems are quickly becoming the default measurement system for wind energy projects, with systems proving capable of delivering high-quality data for a range of applications within the sector. One of the most exciting developments over the last few years has been the progression of scanning lidar systems. Depending on the range capability and mode of operation, they have the potential to address all wind energy atmospheric measurements applications including wind resource and site conditions. Crucially, early studies have shown potential for remote sensing to provide reliable turbulence intensity data offshore. But how accurate are they? How can they be optimally configured? Do all scanning lidars deliver the same results? These questions will be answered by Fraunhofer IWES and Oldbaum within a project commissioned by TotalEnergies.
Answers to these questions are essential for a wind farm developer and operator such as TotalEnergies, since these can help develop offshore wind farms without the presence of a met mast or even the deployment of a floating lidar buoy. Test sites on the British and Japanese shores have been chosen because they are equipped with a meteorological mast at a coastal distance of up to 7 kilometers. The data from these meteorological masts can be used as reference for the Dual scanning lidar technology.
“As we advance offshore wind farm development, understanding atmospheric turbulence becomes crucial to optimize designs and improve turbine wake modelling. At TotalEnergies, we are pioneering the use of innovative techniques to better the way we measure offshore turbulence intensity. This unique collaboration with Fraunhofer IWES and Oldbaum Services, leaders in the field of wind measurements, supports us in demonstrating the value of the dual-scanning lidar technology through this project.“ states Julien Haize, project manager and Offshore Wind Technical Engineer at TotalEnergies.
Fraunhofer IWES Chief Scientist Dr. Julia Gottschall, who leads the project, adds: “As the first of its kind in the world, the project will examine the measurement capability of four different manufacturers’ long range scanning lidar systems and provide highly valuable insights into the measurement capability and sensitivity of the measurements to different environmental conditions.”
This is achieved by the creation of a novel long range testing facility in Blyth, UK and a parallel test conducted at a shorter-range test facility in Japan. The parallel nature of the program expands the range of environmental conditions to which these lidar systems are exposed, giving valuable information on what drives the accuracy of these systems compared to traditional measurement systems such as meteorological masts.
Technical and data support is provided by Oldbaum Services based in Scotland, UK. Oldbaum will create the test site in UK, support machine operation and system setup to achieve the scientific objectives of the project as described above.
“Oldbaum Services are delighted to work with Julia Gottschall and Fraunhofer IWES to deliver this innovative project on behalf of TotalEnergies. The offshore wind industry is in need of high-quality datasets that give a complete picture of the energy potential and scanning lidars, especially in dual configuration, have the unique capability to answer this need,” states Andrew Oldroyd, Technical Director of Oldbaum Services.
After preparation of the scientific workplan, the two measurement campaigns in UK and Japan started in August and October 2024, respectively. The project will be running until June 2025.
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Fraunhofer IWES
Fraunhofer IWES develops innovative methods to accelerate the expansion of the wind energy and hydrogen economy, minimize risks and increase cost efficiency. Innovations in technological developments are validated and innovation cycles are shortened. Planning and development of offshore wind farms are accelerated and made more precise. At present, there are more than 300 scientists and employees as well as more than 100 students employed at the nine sites: Bochum, Bremen, Bremerhaven, Görlitz, Hamburg, Hannover, Leer, Leuna, and Oldenburg.
TotalEnergies
TotalEnergies is a broad energy company that produces and markets energies on a global scale: oil and biofuels, natural gas and green gases, renewables and electricity. Its 105,000 employees are committed to energy that is ever more affordable, clean, reliable and accessible to as many people as possible. Active in more than 130 countries, TotalEnergies puts sustainable development in all its dimensions at the heart of its projects and operations to contribute to the well-being of people.
TotalEnergies OneTech is the newly created branch of TotalEnergies S.E in charge of its research, development & technology activities and of valorizing its intangible assets.
Oldbaum Services
Oldbaum Services are a wind energy consultancy based in Scotland UK. Oldbaum have a history of delivering innovation in the area of wind energy measurements, and especially with lidar. Oldbaum have delivered industry enabling campaigns such as NORSEWiND and pioneering work in the use of scanning lidar in difference markets around the world including being one of the first example of consultancy services in Japan using scanning lidar for offshore wind. Oldbaum have delivered over 15 scanning lidar campaigns around the world, all with a clear focus on delivering quality datasets to develops in order to answer both financial and engineering project requirements.
Wissenschaftlicher Ansprechpartner:
Contact partner at the Fraunhofer Institute for Wind Energy Systems IWES
Project coordination, Dr. Julia Gottschall, Chief Scientist
Phone: +49 (0)471 14290-354
E-mail: julia.gottschall@iwes.fraunhofer.de
www.iwes.fraunhofer.de
Contact at TotalEnergies
Project manager, Julien Haize, Technical Lead Engineer
Phone: +33 (0)6 12 24 89 19
E-mail: julien.haize@totalenergies.com
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