ETA has been involved with offshore renewable projects since ‘North Hoyle’, the UK’s first major offshore windfarm project. ETA has provided support on all aspects of the cable installation and maintenance, offering services from total project management as ‘cable package managers’, to 'one-off' consultancy assignments, design work, planning, and technical studies.

In their role as ‘cable package managers’, ETA has provided the overall project management of the offshore cable including specification, procurement and installation on many offshore wind projects such as Q7 (Princess Amalia) Windpark (120 MW), Belwind (Bligh Bank) Windfarm (phase 1 – 165 MW) and on the Tees Offshore Windfarm (62 MW).

Alongside our work in the offshore wind market below, ETA’s expertise have been acquired from their background in the installation and maintenance of subsea cable in the traditional fields of power cable, telecom, or offshore oil and gas projects as well as from their extensive involvement with other offshore renewables such as Tidal Energy.

A sample of ETA’s varied experience in the Offshore Wind market can be found below.

For more information on ETA’s products and services give us a call on:

Offshore Wind Power Cable Clients and Project Examples

Teesside
Offshore Windfarm
Teesside Offshore Windfarm is a 62 MW windfarm constructed just east of the mouth of the River Tees. ETA were brought in by owners EDF Energy Renewables to act as Offshore Cable Package Managers for the project.

ETA provided onsite day to day Project Management services for all aspects of the offshore cable planning, procurement, installation and protection.

ETA provided extensive planning services including: route planning, layout planning, cable type specification, and cable supplier selection. ETA also provided the following services during the operations: cable delivery strategy, route clearing, horizontal directional drilling, cable installation, protection strategy, cable burial, scour protection, termination, and commissioning.
North Hoyle
Offshore Windfarm
Constructed in summer 2003, National Wind Power (NWP)'s North Hoyle Offshore Wind Farm was the first of the 'Round 1' UK offshore wind farms to provide power to the grid. Working for Mayflower through their appointed electrical systems consultant Econnnect, ETA provided detailed input to marine cable installation specification and tender processes.

Following this, ETA provided ongoing project management and engineering support to both Econnect and Mayflower. Key areas of responsibility included technical aspects of infield and export cable installation, planning and logistics, including use of GIS to integrate survey and installation drawings and data. ETA provided the Offshore Superintendent for the installation of the infield cabling, utilising Mayflower's innovative subsea cable lay and burial tractor.

ETA's engineering division also supplied additional cable installation equipment under a bespoke design and build contract.
Q7 (Princess Amalia
Wind Farm)
Q7, now known as Princess Amalia Wind Farm, is a 120MW (60 turbine) windfarm off Ijmuiden in the Netherlands. The cable system consists of 2x120kV (27km) export cables to shore and a 22kV (45km) infield cable network.

ETA project managed the full cable procurement and installation package on behalf of the windfarm owners (Eneco) including route survey, burial assessment and final determination of the cable lengths, types, routes and burial strategies. Soil types varied between mobile sands and clays.

Cable protection was achieved utilizing a jetting tracked ROV and rock placement at foundations which also provided scour protection.
Belwind Wind Farm
(Bligh Bank)
Belwind Wind Farm is a 165MW (55 turbines), windfarm located 46km from the Belgian port of Zeebrugge. The cable system comprises 150kV export and 33kV infield cables. ETA acted as offshore cable package manager for the main contractor throughout the project.

Particular seabed soil conditions included sand waves requiring careful management. Cable protection was achieved utilizing a Jetting tracked ROV, Jetting sledge and rock placement at foundations.
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