Northwester 2 OHVS Installation

Market: Renewables and Environmental 
Scope of Work: Northwester 2 OHVS installation
Location: North Sea, Belgium
Client: Bladt Industries A/S
Period: September 2019
HLV: Gulliver

Parkwind is developing the Northwester 2 offshore wind farm off the coast of Belgium with a maximum output of 218,5 MW. 
Parkwind has contracted Bladt Industries for the fabrication, transportation and installation of the Northwester 2 offshore high voltage substation. Bladt Industries subcontracted Scaldis Salvage and Marine Contractors for the installation of the OHVS, weight 964t.

The OHVS is a 4-deck substation which will be installed on a transition piece. The wind turbines of the Northwester II wind farm will be interlinked using 33kV infield cables. Eventually the WTG’s will be connected via the OHVS onto the 220kV export cable. On the OHVS a 33kV switchgear, a single 220/33kV transformer and a 220kV switchgear are installed as main components.

Scaldis Scope

Gulliver installed her first offshore transformer station on DP2, within a record time. After an extensive Preparation period by our engineers and a good cooperation with our client Bladt Industries we successfully installed the substation on the 10th of September in the Belgian North Sea.

Heavy lift vessel Gulliver departed from Flushing to the Northwester 2 offshore site and performed her DP2 trials and preparations for installation. At sunrise, we received permission from Parkwind to start the operation. The substation transportation barge was moored to the Gulliver and the dyneema slings connect to the topside.

Once the topside was lifted, The Gulliver sailed to the foundation and carefully started positioning herself before finally lowering the topside into position. For the first time, Scaldis had installed a topside completely on DP2 and thereby set a new milestone for the company.

Under the approving eye of its next client at the Seamaid offshore field, Scaldis completed the works and set sail back to port. Thanks to a good preparation and a motivated team the entire operation was performed in a record time. 
Scaldis has once more shown that it is ready for a safe and successful future and can play an important role in the coming energy transition.