TNO

TNO provided metocean-related measurement support for Offshore Windpark Egmond aan Zee (OWEZ) by hosting the project as a measurement location within its Offshore Wind Measurements programme and making validated measurement data available to users. The TNO information described how measurement data from OWEZ were quality controlled to prevent corruption of the database. The validation approach included automated checks by the measurement computer (e.g., detecting loss of connection to sensors or the measurement system and signals outside minimum/maximum limits) and a subsequent daily manual review to identify deviations. Data failing these checks were flagged as invalid and were excluded when users requested datasets, helping ensure that downstream analyses were based on reliable metocean measurements. TNO’s role as the information provider and data-validation host supported ongoing operational understanding of wind and environmental conditions at the Netherlands’ first offshore wind farm, located 10–18 km off Egmond aan Zee. The availability of curated datasets also enabled broader industry and research use of OWEZ measurement records, contributing to performance assessment and learning from the demonstration project experience.