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East Anglia ONE

In 2009, ScottishPower Renewables, working in a 50:50 joint venture partnership with Vattenfall Wind Power, was awarded rights to develop offshore capacity off the coast of East Anglia as part of the Crown Estate’s Round Three programme.

East Anglia ONE is the first of four projects in the East Anglia region to begin construction. East Anglia THREE was recently granted consent by the Planning Inspectorate. Proposals for the remaining projects are still in development.

May showing the East Anglia windfamr projects off the coast of Lowesoft and Great Yarmouth. East Anglia ONE - under construction, 714 megawatts. East Anglia ONE North - in development, up to 800 megawatts. East Anglia TWO - in development, up to 900 megawatts. East Anglia THREE - consented, up to 1200 megawatts.

Introduction

East Anglia ONE consists of up to 102 Siemens wind turbines and foundations, each rated at 7 megawatts. This gives an overall annual generating capacity of up to 714 megawatts.

An offshore substation platform and its foundations are being built to collect the electricity from the turbines and transform it to a form suitable for transfer to shore.

Two seabed export cables, each around 85 km in length, will transfer the electricity to shore. A landfall site with onshore transition pits is needed to connect the offshore and onshore cables. This is located at Bawdsey, Suffolk.

Underground cables will be used to transfer the electricity. These have been laid from Bawdsey, under the River Deben and around Ipswich to a new onshore converter station at Burstall, near Bramford. The substation will connect the offshore windfarm to the National Grid.

Map showing the East Anglia cabling

The onshore cable route is about 37 km (23 miles) long and is mainly located on farmland with some crossings of public highways, footpaths and bridleways. The majority of the route has been constructed using open cut methods, other than at locations where the route must go under a major transport network or natural obstacle, such as the A12 or the River Deben. The installation of the cables under these features  required underground drilling.

While East Anglia ONE is built, cable ducts for a future East Anglia project have also been installed. This will help reduce the impact of future construction, as cables for the future project would be pulled through the pre-laid ducts. On completion of East Anglia ONE, the land will be returned to the same condition as it was before. We will plant two new trees for any one tree that had to be lost.

 
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