Greater Gabbard OFTO is the 132 kV HVAC offshore transmission system that connects the 504 MW Greater Gabbard offshore wind farm (140 turbines) in the southern North Sea to the onshore transmission network at Leiston/Sizewell, Suffolk. The transmission assets comprise two offshore substation platforms (Inner Gabbard and Galloper) linked by...
OFTO transfer value / reported project capital value at financial close; covers Greater Gabbard OFTO transmission assets (two offshore substations, one onshore substation, ~3 export cables and inter-platform cable).
1 Cost inflated in local currency then converted to euros (where applicable).
Cable Specifications
Greater Gabbard Export Cable 1
Sizewell, Suffolk, United Kingdom
1 × 132 kV HVAC · 46.09 km
System:1 × 132 kV HVAC
Route length:46.09 km(45.5 subsea · 0.59 land)
Burial depth:
Sources describe the export circuits as submarine high-voltage cables that are 'buried in the sea bed' for the offshore portion, with the submarine cable joined at landfall to a buried...
Fibre optic:
Project information states the inter-platform interconnector and subsea cables provide fibre‑optic communications for mission‑critical operational plant information (used for SCADA/operational signalling). Sources note the interconnector cable between Galloper and Inner...
Greater Gabbard Export Cable 2
Sizewell, Suffolk, United Kingdom
1 × 132 kV HVAC · 46.09 km
System:1 × 132 kV HVAC
Route length:46.09 km(45.5 subsea · 0.59 land)
Burial depth:
Described in company/regulatory documents as buried in the seabed for the offshore sections; the export cables are referred to as "three 45.5 km high voltage submarine cables buried in the...
Greater Gabbard Export Cable 3
Sizewell, Suffolk, United Kingdom
1 × 132 kV HVAC · 46.09 km
System:1 × 132 kV HVAC
Route length:46.09 km(45.5 subsea · 0.59 land)
Burial depth:
Sources state the export cables are buried in the seabed for the submarine sections; no target or actual burial-depth figures are provided. At the landfall the submarine cable is joined...
Galloper–Inner Gabbard Interconnector
1 × 132 kV HVAC · 16 km
System:1 × 132 kV HVAC
Route length:16 km(16 subsea)
Burial depth:
Sources describe this link as a submarine high-voltage cable forming an interconnector between Galloper OSP and Inner Gabbard OSP, but do not state a specific burial depth for the inter-platform...
Fibre optic:
Project materials indicate the interconnector cable provides both power transportation and fibre-optic communications for mission-critical operational plant information (SCADA/control/operational telecoms). The developer/asset manager documentation and case study state the interconnector...