Heerema Fabrication Group

Heerema Fabrication Group (HFG) is fabricating the jacket substructure for the IJmuiden Ver Beta 2 GW HVDC offshore converter platform under TenneT's standardised 2 GW programme for offshore grid connections in the Dutch and German North Sea. The first steel cut took place at HFG's shipyard in Vlissingen, the Netherlands, on 5 September 2025, marking the start of construction. The jacket is one of three structures HFG is building under this programme. HFG performs the jacket fabrication on behalf of the Seatrium and GE Vernova consortium, which holds the overarching contract from TenneT to deliver the HVDC offshore platform (topside and substructure). The IJmuiden Ver Beta jacket measures approximately 90 metres in length and 43 metres in width and weighs over 10,000 tonnes, reflecting the scale of the new 2 GW HVDC infrastructure designed to transport large volumes of offshore wind power to shore using fewer platforms and cables than previous generations. The platform supports the IJmuiden Ver Beta grid connection that collects 66 kV AC power from the Zeevonk wind farm and converts it to 525 kV DC for ~155 km onward transmission to the Maasvlakte onshore converter station, with phased operation of the connected wind farm planned for 2029 (1 GW) and 2032 (further 1 GW).