Our offshore infrastructure
Our offshore infrastructure will include the turbines, offshore substations and cables. We also need to identify the cable landfall location (the point at which cables carrying the electricity being generated reach the shore).
The area that we’re currently evaluating for where our offshore cable route could be located is known as the Offshore Transmission Infrastructure Scoping Search Area.
We would welcome comments on this scoping search area that may help us as we determine factors to be considered when deciding where our offshore infrastructure should be located. These could be comments on anything from marine ecology to shipping routes or seascape visual impact.
At this current stage it is too early in the process to know the size and number of turbines required but we are working to develop that information for our next stage of consultation.
How we construct an offshore wind farm
It’s too early for us to know exactly how we'll construct the wind farm. An important part of our ongoing technical work will be to develop these plans. Your feedback will help us develop construction plans that have as little impact on the surrounding area as possible.
Typically, to build the wind farm we will need to carry out a range of construction activities:
- Prior to installation, some seabed preparation activities may be required such as removing sand and boulders to clear a route for the offshore cable and the turbine foundations.
- The wind turbine and offshore substation foundations are then installed, before the wind turbine tower, nacelle and blades, and the substation structure are installed on top of the foundations.
- Cables will be installed into the seabed between each wind turbine, between the wind turbines and the offshore substations; and between the offshore substations and the shore. This will involve a number of different types of vessels including those with cranes installed, support vessels and cable vessels.
- At the landfall, the cable will be brought on to the shore using a method suitable for the particular location that’s been chosen. For example, this could include horizontal directional drilling underneath coastal cliffs or installing a temporary trench through the beach.
- The onshore substation will be constructed using traditional construction techniques.
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