Gwynt-y-Môr offshore wind farm export cable repairs
The 576 MW Gwynt-y-Môr Offshore Wind Farm is located off the coast of North Wales, UK.
Irish Sea, off the coast of North Wales, UK
Scope
Replacement of multiple sections of faulty export cable
- Site investigation surveys
- Engineering
- Landfall-pull ashore
- Horizontal directional drilling (HDD) beneath a railway line
- Transition joint bay works
- De-burial, removal and disposal
- Transport and installation of spare cable
- Offshore and onshore jointing (including universal joints)
- Re-burial and energisation
Execution
N-Sea’s smart solution
Over time, N-Sea developed bespoke preventative and corrective solutions to replace faulty cable sections. Various solutions were designed, engineered and scheduled to reduce outage duration, align
the outages with scheduled maintenance, and remain within OFGEM budget constraints.
These solutions included the use of spare HDD ducts, temporary cable sections, pre-dredged trenches, and vessel solutions for varying water depths and cable lengths. N-Sea deployed its in- house repair vessel Curo (DP2 and anchor handling including beaching) alongside jack-up solutions from the market to deliver optimal project outcomes.
