Humber Gateway offshore wind farm

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Atkins produced the detailed design for E.ON’s Humber Gateway offshore wind farm’s offshore substation support structure.

Atkins produced the detailed design for E.ON’s Humber Gateway offshore wind farm’s offshore substation support structure. Harland and Wolff Heavy Industries Limited delivered E.ON with a full design and build package with Atkins subcontracted for the module support structure design. This project was awarded to Atkins because of our geotechnical expertise and capability to develop feasible foundation designs for the chalk ground conditions.

The offshore substation platform substructure consists of two components; a piled jacket and a module support frame (MSF) that was lifted onto the jacket substructure on site. All work was performed with due consideration to the difficult ground conditions and a key project requirement to enable installation using the project’s jack-up vessel – the MPI Adventure – which imposed restrictive load curve limits on geometry and weight. This enabled the developer to make optimal use of long term charter arrangements and mitigate installation risks.

The MSF provides support and allows access to two topside modules. The modules are connected to the foundation through eight support points, four per module. The modules connect to the wind farm by eight array cables each and are connected to land by one export cable each.

Atkins conducted:
• Full in-place, load-out, transportation analyses
• Lift structural analyses for both structures
• Fatigue, ship impact and on bottom stability analysis for the jacket substructure
• Detailed design drawings based on calculations for fabrication at Harland and Wolff’s shipyards in Belfast.

The work took place during 2013, and was completed in 2014.

Humber Gateway is located in the northern part of the Greater Wash area. The site is around 8km east of the Yorkshire coast near the Humber Estuary in the North-East of England. The wind farm has an installed capacity of 219MW, consisting of 73 3MW Vestas V112 turbines and a single twin circuit 33KV to 132KV substation. The wind farm provides 170,000 homes with green power.

Key facts

Location:
Humber Estuary, Yorkshire  

Country/Region:
United Kingdom

Client:
E.ON

Collaborators:
Harland and Wolff

Additional facts:
Installed by the MPI Adventure.

Jacket foundation weight - 570 tonnes.

8 piles - 680 tonnes.

Module support frame - 320 tonnes.

2 topside modules - 450 tonnes each.

Sling laydown platform- 20 tonnes.

The windfarm supplies power to around 170,000 homes.

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CONTACT

Group

Andy Thompson
Market lead, offshore engineering

Tel: +44 1454 662662
Email: andrew.thompson@atkinsglobal.com

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