Sensors Installed on New Offshore Wind Turbine Foundation
Strainstall has been subcontracted by the Norwegian Geotechnical Institute (NGI) to install sensors, as part of its Structural and Environmental Monitoring (SEM) solution, on to a new Suction Bucket Jacket foundation, which is currently being trialed at the Borkum Riffgrund 1 Offshore Wind Farm in Germany.
Deployed in August 2014 by Dong Energy as part of its collaboration with the UK’s Carbon Trust Offshore Wind Accelerator (OWA), the new foundation structure has been designed to help cut the costs of electricity from offshore wind farms.
The tripod foundation structure has been equipped with 126 different sensors from the turbine tower down to the foundations, below the water line and also below the mudline, utilizing a method of mechanical protection developed by NGI. The comprehensive SEM system was developed by NGI and the long-term monitoring scheme is unique within the offshore wind industry in terms of underwater instrumentation. The instrumentation work was carried out by Strainstall and NGI and started at Bladt Industries, Aalborg, Denmark and was finalized offshore, Borkum Riffgrund in German sector of the North Sea.
This project forms the culmination of work by nine industry operators to overcome some of the challenges facing offshore wind farms in the future. The insight provided by NGI’s monitoring system will help the OWA project partners to evaluate whether this new concept can be utilized throughout the offshore wind industry.