Seismic surface surveys using Fraunhofer Institute for Wind Energy and Energy System Technology systems have helped to keep the 385MW Arkona wind farm on schedule, despite changes to the offshore wind farm’s design.

The €1.2bn project in the German Baltic Sea will consist of 60 Siemens 6.4MW turbines instead of 80 smaller units in the original plans.

The institute said using its smart multi-channel seismic system made it possible to look at deeper layers rather than conduct new surveys for the larger turbines.

“The drilling of new boreholes and pressure sounding in the 39km squared area would have resulted in longer lead times and would really have squeezed the budget,” Fraunhofer said.

Instead, “a close-profile, multi-channel seismic survey of the wind farm area and subsequent work-up of a high-resolution 3D layer model provided the basis for the interpolation of local, geological profiles/data at certain points”, it added.

Image: Siemens