Saint-Brieuc Export

Offshore GridOperational496 MW225 kV126.5 km

Basic Information

Also known as:Saint-Brieuc offshore wind farm grid connection, Saint-Brieuc 225 kV export cables, RTE Saint-Brieuc export link

Status:Operational

Capacity:496 MW

Transmission Model:TSO Build & Own

Owners:

Réseau de Transport d'Électricité (RTE)(100%)

Project Company:

Réseau de Transport d’Électricité (RTE)

Type:offshore grid

Website:www.nexans.com

Description:

The Saint-Brieuc export connection is the HVAC grid link that transmits power from the 496 MW Saint-Brieuc offshore wind farm (Ailes Marines / Iberdrola-led) to the French transmission network. The system comprises two 225 kV three-core subsea export cables (each ~33.5 km; ~67 km total offshore) from the wind farm’s...

Supply Chain (0)

Project Timeline (0)

No lifecycle events recorded yet.

System Topology

Export

React Flow

Route

	Bay of Saint-Brieuc (English Channel)	Côtes-d'Armor
Landfall	N/A	Caroual Beach, Erquy, Côtes-d'Armor, France
Grid Connection	—	Doberie substation (Hénansal)

Bay of Saint-Brieuc (English Channel)

Landfall:N/A

Grid:—

Côtes-d'Armor

Landfall:Caroual Beach, Erquy, Côtes-d'Armor, France

Grid:Doberie substation (Hénansal)

Financial

€115M€141.3M adj.€2.25k/MW-km

www.nexans.com (Nov 2019)

CAPEX:€115M

Adjusted to 2025¹:€141.3M

Cost Intensity¹:€2.25k per MW-km

Estimate Date:Nov 2019

Source:www.nexans.com

Notes:

Contract value awarded by RTE to Nexans for supply and installation of the Saint-Brieuc export cables (67 km offshore + 93 km onshore) and IMR services; this is the Nexans...

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

Cable Specifications

Saint-Brieuc export cable system

Caroual Beach, Erquy, Côtes-d'Armor, France

2 × 225 kV HVAC · 496 MVA · 126.5 km

System:2 × 225 kV HVAC

Power rating:496 MVA

Route length:126.5 km(33.5 subsea · 93 land)

Burial depth:

The two 225 kV subsea export cables were buried and protected using jetting and mechanical trenching techniques: Nexans installed the cables and used its Capjet jet-trenching system to trench the...

Fibre optic:

The export cable design incorporates an embedded fibre-optic element intended for remote health monitoring and the transmission of information between the offshore wind farm (offshore substation) and the onshore base....

Collector Stations

Offshore Platform (FR)

Saint-Brieuc offshore substation (Bay of Saint‑Brieuc, English Channel), France

496 MW 225 kV · offshore

Rating:496 MW · 225 kV

Location:offshore

Doberie substation

Hénansal, France

496 MW 225 kV · onshore

Rating:496 MW · 225 kV

Location:onshore