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Global Offshore completes cable campaign at Kriegers Flak

By: Tom Russell 06/04/2021 Global Offshore

General Vessels Windfarms

Global Offshore, part of the Global Marine Group, has completed a cable installation campaign at Vattenfall’s Danish Kriegers Flak offshore wind farm.

The initial phase of work, completed last year, saw Global Offshore utilise their multi-purpose PLP240 pre-lay plough, mobilised on the Havila Jupiter, to carry out route clearance totalling approximately 158km.

The second phase, which commenced in September 2020, included the installation of 72 inter-array cables, utilising Normand Clipper, and the jet trenching of 72 routes using the Q1400 aboard sister vessel, Normand Cutter. Following the cable installations, the PLP240 returned to site to conduct backfilling operations, the first operation of its kind on an inter-array grid.

Prior to the commencement of the second phase, Global Offshore upgraded the 127.5 metres Normand Clipper for power cable work. It saw the addition of a 4,000 tonne cable carousel, two 15-tonne cable tensioners, a 25-tonne quadrant deployment frame and a fully integrated control system.

Mike Daniel, Managing Director of Global Offshore said, “We are delighted to report the successful installation of all 72 inter-array cables at Danish Kriegers Flak Offshore Wind Farm. Despite COVID-19 restrictions and the associated challenges, extreme weather, and complex seabed conditions, our expert teams have met client expectations and completed this project safely, in under six months.”

Ian Bremner, Project Director at Vattenfall said, “Global Marine Group has shown professionalism in their operations and solution-oriented thinking, delivering a high standard of engineering to deal with the technical challenges during work execution. Our partner has worked safely throughout the COVID-19 pandemic alongside other ongoing site operations, contractors and the Vattenfall project team.”

Located 15-40 km offshore in the Danish Baltic Sea, the Kriegers Flak wind farm is set to feature 72 Siemens Gamesa SG 8.0-167 DD turbines, each with a rotor diameter of 167 metres and tip height of 188 metres. The individual parts of the turbines are assembled at Port of Roenne on the Danish island of Bornholm. They are shipped in sets of four to the construction site. The 72 turbines will be commissioned on an ongoing basis as they are installed.

Vattenfall secured rights to the 604.8 MW project in November 2016, with a winning bid of EUR 49.9 per MWh. Kriegers Flak is expected to increase the Danish production of wind energy by 16 per cent or enough to cover the annual electricity consumption of approximately 600,000 Danish households.

For more information on offshore wind farms worldwide, click here.

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Global Offshore completes cable campaign at Kriegers Flak

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