Westermost Rough OFTO

Offshore GridOperationalGB205 MW150 kV27 km

Basic Information

Also known as:TC Westermost Rough OFTO, TC Westermost Rough OFTO Ltd, TC Westermost Rough OFTO Limited, Westermost Rough OFTO TR3, Ofgem TR3 Westermost Rough OFTO

Status:Operational

Capacity:205 MW

Transmission Model:Developer Build & Transfer

Owners:

International Public Partnerships (INPP)(100%)

Project Company:

TC Westermost Rough OFTO Limited

Type:offshore grid

Expected Life:20 years

Website:www.transmissioncapital.com

Description:

Westermost Rough OFTO is the dedicated offshore transmission link that connects the 210 MW Westermost Rough offshore wind farm (35 × 6 MW Siemens turbines) to Great Britain’s onshore transmission network at National Grid’s Hedon 275 kV substation near Hull. The transmission system is an HVAC developer-build-transfer OFTO installation comprising...

Supply Chain (0)

Project Timeline (0)

No lifecycle events recorded yet.

Route

	North Sea	East Riding of Yorkshire
Landfall	N/A	Withernsea, East Riding of Yorkshire, United Kingdom
Grid Connection	—	Hedon 275 kV substation

North Sea

Landfall:N/A

Grid:—

East Riding of Yorkshire

Landfall:Withernsea, East Riding of Yorkshire, United Kingdom

Grid:Hedon 275 kV substation

Financial

£156.7M€249.5M adj.€45.08k/MW-km

www.transmissioncapital.com (Feb 2016)

CAPEX:£156.7M

Adjusted to 2025¹:€249.5M

Cost Intensity¹:€45.08k per MW-km

Estimate Date:Feb 2016

Source:www.transmissioncapital.com

Notes:

OFTO asset transfer value at financial close — transfer of offshore substation, export cable(s) and onshore substation/cables (developer-build-transfer under Ofgem TR3).

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

Cable Specifications

Westermost Rough OSP – Hedon export cable

Withernsea, East Riding of Yorkshire, United Kingdom

1 × 150 kV HVAC · aluminium 630 mm² · 210 MVA · 27 km

System:1 × 150 kV HVAC

Construction:aluminium · 630 mm²

Power rating:210 MVA

Route length:27 km(12 subsea · 15 land)

Burial depth:

Project documentation does not specify a single numerical burial depth for the Westermost Rough export cable. Available sources indicate that the subsea export cable was installed along an offshore route...

Collector Stations

Offshore Substation Platform (OSP)

Westermost Rough (offshore wind farm / OSP site), United Kingdom

210 MW 150 kV · offshore

Rating:210 MW · 150 kV

Location:offshore

Hedon 275 kV substation

Hedon, East Riding of Yorkshire, England, United Kingdom

210 MW 275 kV · onshore

Rating:210 MW · 275 kV

Location:onshore