Borkum Riffgrund 2 – Ørsted (On behalf of ABS-Group)

CLOCSS was involved in this project on behalf of ABS-Group, contracted through Hisland Solutions AB (former Himec Solutionc AB). The substation was built at HSM Offshore BV at their yard in Schiedam, The Netherlands.

Our task was to certify the substation on delivery to assure Ørsted and the German authorities that the corrosion protection was carried out according to the relevant standards and project specifications. In order for ABS-Group to issue the certificate we needed to do the following;

• Attend progress meetings
• Review coating reports
• Advise on site on process management
• Carry out intermediate inspections
• Attend final inspections
• Issue intermediate reporting to ABS-Group on a weekly basis.
• Attend hook-up inspections offshore after installation.
• Issue final reporting to ABS-Group to enable them to issue the certificate.

Borkum Riffgrund 2:

An offshore windfarm developed 54km off the coast of Lower Saxony in the North Sea, Germany. The project is located next to the existing Borkum Riffgrund 1 windfarm.

Borkum Riffgrund 2 is jointly owned by Global Infrastructure Partners (GIP – 50%) and Orsted (formerly DONG Energy – 50%), with the latter being the developer. The final investment decision for the windfarm was taken in June 2016, while commissioning is done in the first half of 2019.

The offshore windfarm is operated from Ørsted’s base in Norddeich. It has a total capacity of 450MW and produces sufficient electricity to power approximately 460,000 German households a year.

Borkum Riffgrund 2 windfarm details:

The windfarm will be installed with 56 V164-8.0 MW MHI Vestas wind turbines with a capacity of 8MW each. The turbine blades are 80m-long, weigh 35t, and have a total swept area of 21,124m². The 390t nacelle of the turbine is 20m-long, 8m-wide, and 8m-high.

The turbines have a hub height of 105m and a tip height of 187m, installed on suction bucket jackets.

The offshore windfarm will also include a high-voltage AC transformer substation, which will step-up the electricity generated and transfer it onshore.