McDermott cut first steel for LanWin1 2 GW offshore converter platform, the second platform under TenneT EPFIC contract after BalWin4.
Asso.subsea has been awarded the nearshore cable installation scope for three of TenneT’s 2 GW grid connection projects: BalWin4, LanWin1, and LanWin5, located off the northwestern coast of Baltrum Island in northern Germany. Working under Jan De Nul as main contractor and with TenneT as end client, Asso.subsea will handle transportation and nearshore installation of a bundled configuration comprising two HVDC power cables, one metallic return cable, and one fibre optic cable for each project, with nearshore installation for LanWin1 scheduled to be executed in 2028.
On 30 May 2024, LS Cable & System commenced production of the first 525 kV DC cables at its Donghae facility in South Korea under TenneT’s framework agreement with the Jan De Nul Group, LS Cable & System and Denys. This marks the start of cable manufacturing for the BalWin4 and LanWin1 2 GW offshore grid connection projects, with the initial high-voltage direct current cables specifically intended for these connections.
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LanWin1 is a TenneT 2 GW HVDC offshore grid connection designed to evacuate power from German North Sea offshore wind areas to the onshore transmission grid at Unterweser (Wesermarsch). The link uses bipolar ±525 kV VSC HVDC technology and a certified 2 GW cable system (positive/negative poles pl...
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In March 2024, export credit agency Credendo issued a Green Package policy covering Jan De Nul’s cable‑laying works for the 525 kV HVDC grid connections BalWin4 and LanWin1 in the German North Sea. Under a contract with TenneT, a consortium including Jan De Nul will design, manufacture, transport, install, protect and test the offshore cables, with Jan De Nul responsible for offshore transport, installation, burial and protection, supported by its XL cable‑laying vessel Fleeming Jenkin. The Credendo policy provides up to 98% cover for these works, supporting the financing of the LanWin1 grid connection that will bring offshore wind power ashore in Germany.
BNetzA confirmed LanWin1 in Netzentwicklungsplan (NEP) 2037/2045 (2023) on 1 March 2024. This confirmation under §12c EnWG creates the legal basis for the responsible TSO to plan, procure, and construct the offshore grid connection system.
BNetzA confirmed the Netzentwicklungsplan Strom 2037/2045 (2023 edition) on 1 March 2024 under section 12c of the German Energy Industry Act (EnWG). This confirmation creates the legal basis and obligation for the responsible TSO to plan, procure, and construct this offshore grid connection system. For regulated German TSO offshore grid connections, the BNetzA NEP confirmation functions as the de facto Final Investment Decision: unlike merchant or developer-led projects that require a separate board-level investment decision and financial close, the NEP confirmation simultaneously authorises and obligates the TSO to invest. Costs are recovered through the offshore grid levy (Offshore-Netzumlage). The NEP 2037/2045 (2023) schedules 25,980 MW of offshore transmission capacity across 16 grid connection systems for commissioning between 2026 and 2032.
On 5 May 2023, TenneT awarded multi‑billion‑euro contracts for 525 kV HVDC cable systems to NKT, Nexans, and a consortium of Jan De Nul, LS Cable & System, and Denys. Under this award, the Jan De Nul–LS Cable–Denys consortium was selected to realise the cable connections for BalWin4 and LanWin1, both landing in the Unterweser area, and LanWin5 in the Rastede area in Lower Saxony. The scope for LanWin1 includes cable design, engineering, production, delivery, and onshore, offshore, and nearshore installation and jointing as part of TenneT’s 2 GW program.
On 30 March 2023, TenneT awarded a GE Vernova / McDermott consortium the framework contract for the BalWin4 and LanWin1 2 GW HVDC offshore grid connections in the German North Sea. Per the GE Vernova press release, the contracts "are expected to come into effect in April 2023". GE Vernova Grid Solutions is consortium lead responsible for HVDC converter station design, manufacture and commissioning (offshore and onshore), while McDermott is responsible for EPCI of the offshore converter platforms. Combined consortium contract value approximately EUR 4 billion. The award is a firm supplier selection for LanWin1's converter technology under TenneT's 2 GW standardised programme.
In November 2022, TenneT launched a large-scale procurement tender for 525 kV HVDC cable systems covering fourteen offshore and one onshore corridor projects in the Netherlands and Germany, including the LanWin1 2 GW grid connection. The tender opened the market for suppliers to bid for the design, manufacture, delivery, and installation of the cable systems that will connect future offshore wind capacity to the onshore grid.
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