Lifetime Foundation Condition Monitoring Offshore Wind Farm Amrumbank


Offshore wind farm: Amrumbank
Customer: E.ON Kraftwerke GmbH (RWE)
Foundation structure: Monopile of the wind turbine (WTG) and jacket structure of the substation
Turbine manufacturer: SIEMENS
Execution: Monitoring 2015 – today

All facts at a glance:

North sea


Verification of the
foundation structure design

Continuous tracking
of impacts

Identification of
structural behaviour & changes

Adjustment of scope &
Frequency of inspections

EON is the operator of the Amrumbank West offshore wind farm. The wind farm consists of 80 SIEMENS WTGs with monopile foundations and an Electrical Offshore Substation (EOS). The Amrumbank West offshore wind farm is located approximately 38 km north of the island of Heligoland and is situated within the German Exclusive Economic Zone (EEZ).

Wölfel implemented a complete structural health monitoring system. The system monitors all 80 wind turbine foundation structures and the wind farm's offshore substation.

The task of the monitoring system is to verify the design of the foundation structure. Part of the verification is the continuous tracking of impacts from wind, waves and operation of the wind turbines compared to the design assumptions.

Secondly, the monitoring system performs a dynamic identification of the structural behavior and its changes compared to the certified and approved design models.

In this process, a comparison of the fatigue and failure loads with the design cases is calculated to provide the customer with information about the condition of the structure.

Depending on the results of the reports, the scope and frequency of inspections of the primary steel are adjusted as appropriate.