GE Vernova, Seatrium Ink TenneT Deal for 2.2GW North Sea Grid Link
A consortium of GE Vernova and Singapore’s Seatrium has secured a major contract from Dutch-German grid operator TenneT to deliver the BalWin5 offshore grid connection, a 2.2 GW high-voltage direct current (HVDC) transmission system designed to bring North Sea wind power to Germany’s electricity network.BalWin5 is expected to provide enough renewable electricity to supply about 2.75 million households, forming part of Germany’s strategy to accelerate offshore wind deployment and strengthen long-term energy security.The award marks the first German 2 GW-class project for the GE
Fugro Concludes Site Investigations for TenneT’s Offshore Grid Links
Dutch geological data specialist Fugro has completed land and marine site investigations for transmission system operator (TSO) TenneT Germany, to support the development of the LanWin1 and LanWin2 offshore grid connection projects.These projects are part of TenneT Germany’s 2 GW program, a major initiative that aims to connect at least 14 offshore connection systems to the onshore electricity grid, delivering clean energy to up to 35 million European households.The LanWin2 cable route required a range of onshore and nearshore investigation activities to support project development. Fugro’s
NKT Installs Cables for TenneT’s BorWin5 Offshore Grid Connection
Danish power cable maker and services provider NKT has installed the HVDC power cable system for Tennet’s BorWin5 offshore grid connection in Germany.NKT said it completed the installation of the 320 kV HVDC system, completing the pull-in works to the offshore platform with its NKT Victoria cable laying vessel.In 2020, NKT secured a turnkey contract by TenneT to deliver and install a high-voltage DC XLPE power cable system for the BorWin5 project in Northern Germany.The order comprised the manufacturing of approximately 30 km of 320 kV high-voltage DC on-and offshore power cables and accessories
TenneT Hires Asso.subsea for Cabling Work off Germany
Subsea cable services company Asso.subsea has secured the nearshore cable installation contract for three key projects under TenneT’s 2 GW grid program, including BalWin4, LanWin1, and LanWin5.The projects are located off the northwestern coast of Baltrum Island, in northern Germany, and mark the beginning of a new collaboration with Jan De Nul, acting as the main contractor, with TenneT as the end client.Each project involves the transportation and nearshore installation of a complex cable bundle comprising 2 x HVDC power cables, one metallic return cable, and one fiber optic cable.Installation
TenneT Installs Giant HVDC Offshore Wind Converter Platform in North Sea
The DolWin epsilon HVDC offshore wind converter platform, part of German transmission system operator (TSO) TenneT’s grid expansion project, has been installed in the North Sea.The installation of DolWin epsilon HVDC platform at DolWin cluster the German North Sea follows the recent installation of BorWin epsilon platform, forming offshore grid connection systems, which are due to be commissioned in 2025.The DolWin epsilon was built by Seatrium, while Aibel and Hitachi Energy installed the final technical equipment, including the HVDC converter and transformers, prior to commissioning.The
Upscaling Power Subsea: Cables and Connectors
already so massive that one meter of cable can weigh 300kg. Nexans had previously upscaled its production facilities to cater for increasing demand; now it is upscaling its HVDC cables, typically 400kV, to 525kV. The company will be supplying at least 10 of these cable systems to European grid operator TenneT for multiple 2GW projects.The cables will be heavier, and they have the potential to get hotter, necessitating deeper burial in the seabed. The potential risks can be a determining factor in the design of the cable. If a live cable were to be damaged, says Pascal Radue, EVP for Power Transmission
Topside for Hollandse Kust (west Beta) Substation Set to Sail to Final Location
over 3,500 tonnes, will be installed 50 kilometers off the coast of Egmond aan Zee.As part of the job, Sleipnir will lift the 45-metre long, 20-metre wide and 25-metre-high structure from the floating pontoon and place it on the jacket, which has been firmly anchored to the seabed since May 2024.(Credit: TenneT)The topside and jacket will then be welded together and connected to the electricity grid in the coming months.Through this connection, the electricity from the 700 MW project, operated by RWE/OranjeWind, will be fed to the high-voltage grid via the transformer station in Wijk aan Zee.The Hollandse
OEG’s Bluestream to Service TenneT’s Offshore Grid Connection Unit
Bestream Offshore, one of the companies in OEG Energy Group’s subsea division, has secured a contract by TenneT for the retrofit installation of a corrosion protection system for the SylWin alpha offshore converter station for the offshore grid connection SylWin1 in Germany.The award is for the subsea installation of an Impressed Current Cathodic Protection (ICCP) system to replace the existing faulty ICCP system.The replacement of the existing system includes the decommissioning of outdated cables and debris which cause system interference, alongside a pre-survey which will be conducted using a
TenneT Hires Nexans for LanWin 2 Export Cables Scope
French subsea power cable maker and services provider Nexans has secured the project agreement for LanWin 2, valued over $1 billion, under the TenneT frame agreement awarded in May 2023.The project involves the Engineering, Procurement, Construction, and Installation (EPCI) of 250 km of 525 kV High-Voltage Direct Current, Cross-Linked Polyethylene (HVDC, XLPE) onshore and offshore export cable systems.The project is part of the development of TenneT’s 2 GW offshore grid connection program in the German North Sea. Commissioning of the project is expected in 2030.It further sterngthens Nexans’
December 2025
