DolWin6

Offshore GridOperationalDE900 MW320 kV90 km

Basic Information

Also known as:DolWin 6, NOR-3-3

Status:Operational

Capacity:900 MW

Transmission Model:TSO Build & Own

Owners:

TenneT(100%)

Project Company:

TenneT TSO GmbH

Type:offshore grid

Expected Life:30 years

Website:www.tennet.eu

Description:

DolWin6 is a 320 kV HVDC VSC (HVDC Plus) offshore grid connection that transmits up to 900 MW of offshore wind power from North Sea Cluster 3 to the German onshore grid. The system uses two parallel HVDC circuits (XLPE-insulated 320 kV DC cables) routed approximately 45 km subsea from...

Supply Chain (0)

Project Timeline (0)

No lifecycle events recorded yet.

	German North Sea	East Frisia (Lower Saxony)
Landfall	N/A	Hilgenriedersiel, Lower Saxony, Germany
Grid Connection	—	Emden/Ost

Cable Specifications

DolWin6 HVDC export cable system (DolWin kappa — Emden/Ost)

Hilgenriedersiel, Lower Saxony, Germany

2 × 320 kV HVDC · copper 126 mm dia. · XLPE (Cross-linked Polyethylene) · 900 MVA · 90 km · 38 kg/m

System:2 × 320 kV HVDC

Construction:copper · 126 mm dia.

Insulation:XLPE (Cross-linked Polyethylene)

Power rating:900 MVA

Route length:90 km(45 subsea · 45 land)

Weight:38 kg/m air

Burial depth:

The DolWin6 export route comprises ~45 km subsea followed by ~45 km onshore (total ≈90 km). The subsea section was trenched/buried where possible using cable-trenching equipment (e.g., UTV1200 trencher) and...

Fibre optic:

The cable system for DolWin6 includes a fiber‑optic element: Nexans supplied and installed a fibre‑optic cable alongside the HVDC power cables for data transfer and control/telemetry purposes. Multiple project reports...

DolWin kappa — Nordseecluster 1 HVAC connection

3 × 155 kV HVAC · 660 MVA

System:3 × 155 kV HVAC

Power rating:660 MVA

Burial depth:

The inter-platform connection is implemented as a direct 10 kV cable link between the DolWin kappa platform and the neighbouring DolWin beta/kappa infrastructure and is routed across a bridge-link between...

DolWin kappa — Nordseecluster 2 HVAC connection

10 kV HVAC

System:10 kV HVAC

Burial depth:

DolWin6 inter-platform / inter-substation cable routes were installed using standard subsea protection techniques: where feasible cables were trenched/buried using mechanical trenching equipment (projects at DolWin kappa used a UTV1200 trencher),...

Fibre optic:

The DolWin6 cable scope included the supply and installation of fibre-optic cable(s) for data transfer alongside the power cable systems; Nexans (the DC cable supplier/installer) explicitly states it supplied and...

DolWin kappa — Gode Wind 3 HVAC connection

10 kV HVAC

System:10 kV HVAC

Burial depth:

This inter-platform connection is routed between offshore platforms (DolWin kappa and the adjacent DolWin beta) via a bridge link and a direct platform-to-platform electrical connection rather than as a seabed...

Converter Stations

DolWin kappa offshore converter platform

DolWin kappa (offshore, North Sea — near Norderney, Germany), Germany

VSC · 900 MW 320 kV · offshore

Converter:vsc

Rating:900 MW · 320 kV

Location:offshore

Emden/Ost onshore converter and transformer station

Emden/Ost (Emden‑Ost onshore converter and transformer station), Germany

VSC · 900 MW 320 kV · onshore

Converter:vsc

Rating:900 MW · 320 kV

Location:onshore