Scope of Work
Categories:
Offshore Substation DesignOffshore Substation ManufactureOffshore Substation Installation
Lifecycle Stages:
DevelopmentConstruction
Quantities:1 offshore substation
Contract Details
Award Date:25 Apr 2023
Client:
RWE
Description
On 25 April 2023, HSM Offshore Energy (part of the Smulders Group) was awarded by RWE the EPCIC contract for the Thor Offshore High Voltage Substation (OHVS), covering engineering, procurement, construction, installation and commissioning of both the 1 GW / 275 kV HVAC collector topside and its jacket foundation for Denmark's largest offshore wind farm. HSM fabricated the topside at its Schiedam yard in the Netherlands, rolled out the completed structure on 19 November 2024 and sailed it out to the Thor project site in July 2025, with offshore installation completed by 17 July 2025. The OHVS aggregates power from 72 Siemens Gamesa SG 14-236 DD turbines via inter-array cables and feeds it through the 58 km / 2-cable 275 kV HVAC export cable system delivered by Hellenic Cables and installed by Jan de Nul, landing at the Volder Mark onshore substation upgraded by Siemens Energy. Thor achieved first power on 17 March 2026.