West of Duddon Sands OFTO

Offshore GridOperationalGB389 MW155 kV44 km

Basic Information

Also known as:WoDS OFTO, WoDS Transmission plc, West of Duddon Sands offshore transmission system, West of Duddon Sands Transmission Assets, TR2 West of Duddon Sands OFTO

Status:Operational

Capacity:389 MW

Transmission Model:Developer Build & Transfer

Owners:

Dalmore Capital Ltd (managed funds)(100%)

Project Company:

WoDS Transmission plc

Type:offshore grid

Expected Life:20 years

Website:www.wodstransmission.com

Description:

The West of Duddon Sands (WoDS) OFTO is the high-voltage HVAC grid connection that links the 389 MW West of Duddon Sands offshore wind farm (108 x 3.6 MW turbines) in the East Irish Sea to the onshore transmission network. The connection includes a single offshore substation platform (jacket foundation)...

Supply Chain (0)

Project Timeline (0)

No lifecycle events recorded yet.

Route

	East Irish Sea	Cumbria
Landfall	N/A	Heysham, Lancashire, United Kingdom
Grid Connection	—	Heysham 400kV substation

East Irish Sea

Landfall:N/A

Grid:—

Cumbria

Landfall:Heysham, Lancashire, United Kingdom

Grid:Heysham 400kV substation

Financial

£268.9M€432.4M adj.€25.26k/MW-km

www.ofgem.gov.uk (Aug 2015)

CAPEX:£268.9M

Adjusted to 2025¹:€432.4M

Cost Intensity¹:€25.26k per MW-km

Estimate Date:Aug 2015

Source:www.ofgem.gov.uk

Notes:

OFTO transfer value / licence grant for the West of Duddon Sands transmission assets (sale to WoDS Transmission plc). Covers the offshore substation, two export cables and onshore substation.

¹ Cost inflated in local currency then converted to euros (where applicable).

Cable Specifications

West of Duddon Sands export cable system

Heysham, Lancashire, United Kingdom

2 × 155 kV HVAC · aluminium 1000 mm² · 413 MVA · 44 km

System:2 × 155 kV HVAC

Construction:aluminium · 1000 mm²

Power rating:413 MVA

Route length:44 km(41 subsea · 3 land)

Burial depth:

The West of Duddon Sands export cables are installed in the seabed between the offshore substation and the landfall near Heysham; onshore the export cables are routed subsurface to the...

Fibre optic:

Project documentation states that the OFTO and Generator SCADA systems are networked via fibre‑optic communication links between offshore and onshore controllers; the OFTO and Generator SCADA exchange required signals over...

Collector Stations

Offshore Substation Platform (West of Duddon Sands)

West of Duddon Sands (East Irish Sea, off Walney Island), United Kingdom

389 MW 155 kV · offshore

Rating:389 MW · 155 kV

Location:offshore

Heysham substation

Heysham substation, Heysham, Lancashire, UK, United Kingdom

389 MW 400 kV · onshore

Rating:389 MW · 400 kV

Location:onshore