23rd May 2025 in Press releases, Project news, Supply Chain
- Third North Sea HVDC platform marks installation completion of offshore substations on all three phases of Dogger Bank Wind Farm.
- Pioneering design reduces topside weight by as much as 70% compared to traditional designs.
Dogger Bank Wind Farm and its delivery partners have successfully completed the installation of the HVDC offshore substation platform at Dogger Bank C, marking the installation completion of all three offshore substations on the world’s largest offshore wind farm under construction.
Manufactured and supplied by Aibel and installed by Heerema Marine Contractors’ Sleipnir vessel, the Dogger Bank C platform measures approximately 75 x 50 metres across and 36 metres high and sits on a four-legged steel jacket foundation structure which is fixed to the seabed, at an average water depth of around 23m.
The installation of the Dogger Bank C offshore substation topside onto the platform jacket followed on from the safe installation of the platform jacket by Heerema’s Sleipnir vessel a week earlier.
Olly Cass, Project Director for Dogger Bank Wind Farm, said:
“The installation of our third offshore substation platform marks a significant leap on our journey to delivering renewable energy for around 6 million UK homes annually once the wind farm is complete.
“Our strong partnership with Aibel, Hitachi Energy and our installation partners, with Heerema installing this third platform, has been key to the seamless completion and handover of these three pioneering structures.
“This is a significant moment for the project team, our delivery partners and for the UK’s clean energy transition.”
The innovative Aibel platform has a lean design and was the first unmanned HVDC platform to be installed in 2023, when the first of the project’s three platforms was successfully delivered at the Dogger Bank A phase. The substations are designed to be operated from shore and accessed only by a Service Operations Vessel.
Further commissioning activities will now be carried out on the platform to prepare it for future transmission of renewable energy.
Fitted with Hitachi Energy’s latest generation HVDC converter technology, Dogger Bank is the first offshore wind project in the UK to use this technology to transmit the electricity produced back to shore, ensuring the electricity is transmitted efficiently over long distances while minimising losses.
Each of the three platforms will be capable of receiving 1.2GW of AC power generated by Dogger Bank’s offshore wind turbines and converting that renewable energy to DC, before sending that clean, homegrown power ashore to three onshore convertor stations, near Beverley in East Riding of Yorkshire and near Redcar on Teesside.
Mads Andersen, Aibel President and CEO, said:
“The successful installation of the DBC converter platform marks a proud milestone for Aibel and our partner Hitachi Energy. We are honoured to have contributed to the world’s largest offshore wind farm by delivering three lean and effective converter platforms. This achievement reflects the strength of our collaboration with the client partners, the dedication of our teams, and our shared commitment to accelerating the energy transition.”
Martijn Kuipers, Project Director for Doggerbank C at Heerema, said:
“Completing the installation of the Dogger Bank C offshore substation platform marks a proud milestone for Heerema. The thorough preparations and seamless collaboration between Sleipnir’s skilled crew, our project team, Dogger Bank Wind Farm and our subcontractors, enabled us to safely and successfully install the jacket and topside. This achievement reflects Heerema’s commitment to delivering complex offshore projects with precision and innovation, and we are proud to contribute to the UK’s energy transition.”
11th April 2025 in Construction, Press releases, Project news, Supply Chain
Dogger Bank Wind Farm has signed a contract with Seaway7, part of the Subsea7 Group, to charter a second turbine installation vessel to support the ongoing delivery of the offshore wind farm off the coast of England.
This contract signing follows on from the earlier reservation agreement between Dogger Bank Wind Farm and Seaway7, announced in December 2024.
Under the contract, the Seaway Ventus jack-up installation vessel will commence turbine transport and installation work of GE Vernova Haliade-X offshore wind turbines at the Dogger Bank site in mid-2026.
This contract represents additional work for Seaway7 at the Dogger Bank development where the company already has the contracts for transport and installation of the monopile foundations and transition pieces on all three phases of the project, with the works on Dogger Bank A complete and the works on Dogger Bank B substantially complete.
Turbine installation and commissioning work is continuing at Dogger Bank A, with completion of the first phase of the offshore wind farm expected in the second half of calendar year 2025.
When fully complete, Dogger Bank will be the world’s largest offshore wind farm, capable of powering around 6 million UK homes annually.
Dogger Bank Wind Farm is a joint venture between SSE Renewables (40%), Equinor (40%) and Vårgrønn (20%). SSE Renewables is leading construction of the project on behalf of the three joint venture partners. Equinor will be lead operator of the wind farm on completion for its expected operational life of around 35 years.
7th October 2024 in Press releases
- Members of the public are invited to have their say in the coming weeks on a potential fourth phase of Dogger Bank Wind Farm, Dogger Bank D.
- Consultation opens on Tuesday 10 September and is open until Tuesday 22 October
A public consultation into the Dogger Bank D wind farm proposals will begin on Tuesday 10 September, and run for six weeks ending on Tuesday 22 October 2024. The public consultation will feature local in-person events and an online Q&A session to gather feedback from the public.
Dogger Bank D is a potential new fourth phase of the Dogger Bank Wind Farm, the world’s largest offshore wind farm, which is currently under construction. Dogger Bank D would be located in the North Sea, around 210km off the Yorkshire coast and be capable of generating up to 2GW of renewable power. The consultation outlines introductory offshore and onshore proposals for the wind farm.
The consultation offers the community a chance to learn more about the project, ask questions and provide feedback. The project team encourages all feedback during this consultation phase, which will be accepted until midnight on Tuesday 22 October 2024. This input is important in helping to refine the plans for the project. A further phase of consultation is scheduled for 2025.
“We are excited to welcome the public to our consultation events for Dogger Bank D and provide the opportunity for the community to learn more about our proposals. It’s vital for those who live or work locally to be informed about our plans and we look forward to sharing our ideas with the community and listening to what they have to say”
Sophie Large, Senior Project Manager for Dogger Bank D
From Tuesday 10 September, project materials including the consultation brochure, maps and feedback forms will be available for download at www.doggerbankd.com. Consultation documents can also be requested directly from the project team by email or freephone or collected from community access points. For more information, please visit www.doggerbankd.com, call the freephone number on 0800 254 5029 or email contact@doggerbankd.com.
12th September 2024 in Community News, Press releases, Project news
- Anglo-Saxon discoveries near Ulrome and Skipsea close to location where Anglo-Saxon timber hall was excavated by York University earlier this year.
- Dogger Bank discoveries indicate Anglo-Saxons settled in Holderness.
- Evidence of Bronze Age, Iron-Age and Roman presence also excavated during Dogger Bank work.
- Archaeologists to talk about their significant discoveries at public event in Ulrome on 20 September.
Archaeologists working on Dogger Bank Wind Farm will reveal at a public event next week how they unearthed significant evidence of Anglo-Saxon presence in Holderness.
The ground-breaking early medieval discoveries were unearthed by the archaeologists working on the 30km corridor that houses the underground cables transmitting renewable energy from Dogger Bank Wind Farm in the North Sea, to the wind farm’s two onshore convertor stations off the A1079 near Beverley.
These significant discoveries include remnants of an Anglo-Saxon long hall structure between Beeford and Skipsea, and an Iron-Age or Anglo-Saxon glass bead recovered from a site in Ulrome. The two sites close to Beeford produced the most evidence for Anglo-Saxon activity.
More radiocarbon dating of the activity on these sites is required, but at the moment an area of 5th-6th century activity associated with metalworking has been identified, close to a separate area where a long hall and field system ditches were recorded. The findings indicate Anglo-Saxons probably lived and farmed in this landscape over multiple phases between the 5th-11th centuries.
Radiocarbon dating is a scientific method for accurately determining the age of organic materials, by analysing the decay of radioactive isotopes. The developers of the windfarm have invested in this technique to ensure the project provides local communities and historians with accurate data about how the land was used hundreds of years ago.
Across the pipeline route archaeologists also discovered Iron Age and Roman evidence including well-preserved roundhouses in Ulrome, Beeford and Leven, a long-handled bone comb in Leven and significant amounts of handmade and wheel-thrown pottery.
It has long been clear the Holderness area was inhabited by the Anglo-Saxons due to the names of the towns and villages in the area, many of which incorporate Anglo-Saxon elements. Over recent years archaeological evidence has begun to emerge of Anglo-Saxon activity in the landscape, and the findings near Beeford add significantly to an emerging picture of Anglo-Saxon life in the region, greatly enhancing understanding of the period in Holderness.
The evidence for domestic and industrial activity that was unearthed at the sites, which has been evaluated and confirmed by medieval specialists, is of particular importance and significance.
Since the excavations at Beeford, a team of experts from York University has excavated a nearby site in Skipsea, further confirming the presence of Anglo-Saxons in the local area, centuries ago.
Community Engagement Manager for Dogger Bank Wind Farm, Rachel Lawrence, said:
“Safeguarding historical evidence has been a critical part of our preparation work on Dogger Bank Wind Farm. We’re delighted we’re now able to share these exciting findings with the people who live in the towns and villages where this work was undertaken.
“As well as the multi-million pound investment Dogger Bank Wind Farm is making to support its key coastal communities, this work will add to the legacy we’ve created during the construction of the world’s largest offshore wind farm.”
The work was completed by Dogger Bank Wind Farm contractor AOC Archaeology, and their analysis has been supported by a wide team of artefact and period specialists.
Dogger Bank Wind Farm has commissioned the production of replicas of some of the artefacts for educational purposes, and is set to share these with the public for the first time next week.
Representatives from the wind farm and AOC Archaeology will present the findings at a public event at Rickaby Village Hall in Ulrome, at 6pm on 20 September.
After the public event the replicas will be made available for local schools, to bring local history to life in the classroom. They include handmade replicas of a 6,000-year-old flint arrowhead, an Iron Age or Anglo-Saxon glass bead, an Iron Age to Roman bone comb and pottery that is thought to date back more than 2,000 years.
An online exhibition is also set to be launched later this year, giving the public access to a wealth of information about AOC’s work in the East Riding of Yorkshire.
During the Ulrome event AOC experts will share insight into the process of excavating and preserving historical artefacts, and describe the moment they realised they were on the verge of a regionally-significant discovery.
Project Manager for AOC Archaeology, Rebecca Jarosz- Blackburn, said:
“For me the most surprising and rewarding discovery on this project was the Anglo-Saxon long hall and associated field systems we recorded near Beeford, which represents some of the most extensive evidence from the period in the Holderness region.
“Since then it’s exciting to see further evidence from the period emerge, including the recent discovery of another Anglo-Saxon long hall in Skipsea by researchers from York University.
“Together our work on Dogger Bank Wind Farm and this work by York University is adding significant bodies of evidence like Anglo-Saxon pottery, metalwork and industrial materials in a region where Anglo-Saxon evidence has historically been quite sparse.
“Anglo Saxon discoveries of this kind are really interesting, because they give an opportunity to look at the everyday lives of people from the period – including how they farmed and interacted with the landscape. Unlike a cemetery site, where you might find the brooches and more precious items, if you can identify an Anglo-Saxon farming or settlement site you get a rare chance to investigate more of the reality of life in the period.”
Rickaby Village Hall was chosen for this event due to its proximity to the wind farm’s landfall point at Ulrome, where the wind farm’s sub-sea cables meet the onshore cables, for onward transmission to the convertor stations near Beverley. An Iron Age or Anglo-Saxon glass bead that forms part of the school education pack was also unearthed in the village of Ulrome.
The event is supported by Lissett and Ulrome Parish Council.
A second event is set to be held at a location further on in the 30km cable corridor at a future date to be confirmed.
AOC Project Manager Matt Walker, who grew up in East Yorkshire, also has a local connection to the Dogger Bank project. He said:
“One of the exciting outputs of the projects has been the volume of pottery coming out of our ditches – from some sites (including near Leven) there were wheelbarrows full of pottery.
“The region is known for producing Iron Age to Roman pottery so this is not a surprise, and to date the pottery we have typologies giving date ranges based on the fabrics and styles etc.
“At Dogger Bank, one of our main research aims was to try and narrow the current date ranges for handmade prehistoric and Roman pottery in the region by using radiocarbon dating.
“It is the scale of this project across the region, coupled with funding for radiocarbon dates, that gives us a really meaningful opportunity to add to this research theme and advance our understanding of Holderness thousands of years ago.
“What we found in and around Burshill was the core of an Iron Age to Roman settlement that would not have been uncovered without this net zero development.
“There are more artefacts that we’re still analysing and we hope to provide further information about them as our understanding becomes clearer.”
AOC and Dogger Bank Wind Farm are currently considering options for permanently locating the original artefacts once they’ve been fully analysed, with a preference to find a home close to where they were unearthed.
Set to be the world’s largest offshore wind farm once complete, Dogger Bank is situated over 130km from the Yorkshire coast and will produce enough renewable energy to supply electricity to six million homes in the UK annually. The wind farm, a joint venture between SSE Renewables, Equinor, and Vårgrønn, produced first power in October 2023.
The first two phases of the wind farm will transmit renewable energy into the national electricity network via the Creyke Beck substation near Beverley, close to the site where the project has built two onshore convertor stations over the last five years.
23rd July 2024 in Construction, Press releases, Project news, Supply Chain
- Over 200 miles/328km of 66KV cables manufactured by Hellenic Cables under a contract with DEME Offshore.
More than 200 miles (328 km) of 66KV inter-array cables have been successfully installed by delivery partners working on the construction of the world’s largest offshore wind farm.
The cables were laid by DEME Offshore’s Viking Neptun, with burial works being completed by DEME Offshore’s Living Stone.
This work marks the completion of all inter-array cables on the first phase of the wind farm, Dogger Bank A, which began generating power in October 2023.
The network of 95 cables in a multitude of lengths up to 8.6 miles, will connect Dogger Bank A’s 95 Haliade-X 13MW turbines to the Dogger Bank A offshore convertor station. From here the electricity is converted into direct current for transmission to Dogger Bank A’s onshore convertor station via a pioneering HVDC system.
The laying of cables is carried out using a specialist cable lay vessel that uses a carousel and tensioner device, to deploy cable over the stern chute of the vessel and onto the surface of the seabed. The second stage involves connecting the cable to the offshore platform as well as each individual wind turbine.
This challenging engineering process follows on from an intensive preparation period involving underwater surveys, to ensure the cable laying corridor is clear of obstacles.
The 66KV inter-array cables were manufactured by Hellenic Cables under a contract with Dogger Bank tier one contractor DEME Offshore.
Hellenic Cables and Deme Offshore are also responsible for the manufacture and installation of inter-array cables for Dogger Bank B and C. The first inter-array cable for Dogger Bank B is expected to be installed from autumn 2024.
Alan Evans, Dogger Bank Wind Farm Marine Package Manager, said:
“This is another important part of our Dogger Bank A marine work complete, and is the result of a great collaboration between all parties involved.
“With 277 cables to be installed in total, it’s by far the biggest inter-array cable installation programme undertaken to date in offshore wind.
“The safe and smooth completion of this phase is a huge credit to the entire team.”
Geert Linthout, Project Director – DEME offshore, said:
“The teams at Dogger Bank and DEME Offshore have collaborated closely to achieve this significant project milestone.
“Throughout the execution, DEME Offshore has successfully deployed both the Living Stone and the newly added cable installation vessel Viking Neptun, demonstrating outstanding performance.
“This has provided a solid and reliable basis for the upcoming Dogger Bank B phase and, subsequently, the Dogger Bank C phase. We are excited to continue our strong working relationship on Dogger Bank B and Dogger Bank C.”
