Hollandse Kust Zuid (HKZ)

Platform transportation and installation
Pioneering Spirit
2021 Hollandse Kust Zuid

Transport and installation of both 700 MW offshore high-voltage convertor stations for the Hollandse Kust Zuid (HKZ) wind project in the Dutch North Sea. 

Company : Petrofac Norge (TenneT) 

Location : Dutch North Sea, 20 km off the coast of The Hague 

Installation : 2021(Alpha topsides), 2022 (Beta topsides) 

20 m 

Max water depth

Scope of work 

  • Transport & installation of two 4000-tonne offshore HVDC transformer station topsides 
  • Engineering of spreader bar 
  • Engineering & installation and rigging plans 
  • Jacket installation preps (scaffolding, installation of various equipment) 
  • Topsides finalisation works (removal of lifting aids, installation of navaid). 
  • Leg welding 
  • Dropped objects survey by ROV 

4000-tonne

offshore HVDC transformer station topsides

2021 Hollandse Kust Zuid

Specials & challenges 

  • Welding scope 
  • Shallow water area requiring Pioneering Spirit to operate at minimum draught 
  • Wintertime installation (high winds, low temperatures) 
  • Installation during finalisation of Jacket Lift System (JLS) test & commissioning works 
2021 Hollandse Kust Zuid
2021 Hollandse Kust Zuid
2021 Hollandse Kust Zuid
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