DolWin1

Offshore GridOperationalDE800 MW320 kV172.5 km

Basic Information

Also known as:DolWin 1, DolWin1 HVDC, NOR-2-2

Status:Operational

Capacity:800 MW

Transmission Model:TSO Build & Own

Owners:

TenneT(100%)

Project Company:

TenneT Offshore 7.Beteiligungsgesellschaft mbH

Type:offshore grid

Website:www.hitachienergy.com

Description:

DolWin1 is an 800 MW VSC-HVDC (HVDC Light®) offshore grid connection built to collect power from multiple North Sea wind farms and transmit it to the German onshore transmission grid. The system aggregates 155 kV AC from offshore park collection systems at the DolWin Alpha offshore converter platform, converts it...

Supply Chain (0)

Project Timeline (0)

No lifecycle events recorded yet.

Route

	German Bight (North Sea)	Lower Saxony (Emsland district)
Landfall	N/A	Norderney, Lower Saxony, Germany
Grid Connection	—	Dörpen West (Dörpen‑West) substation / onshore converter station (Heede)

German Bight (North Sea)

Landfall:N/A

Grid:—

Lower Saxony (Emsland district)

Landfall:Norderney, Lower Saxony, Germany

Grid:Dörpen West (Dörpen‑West) substation / onshore converter station (Heede)

Cable Specifications

DolWin1 HVDC export link (DolWin alpha – Dörpen West)

Norderney, Lower Saxony, Germany

2 × 320 kV HVDC · symmetric monopole · copper 1000 mm² 115 mm dia. · XLPE (Cross-linked Polyethylene) · 800 MVA · 165 km · 34 kg/m

System:2 × 320 kV HVDC · symmetric monopole

Construction:copper · 1000 mm² · 115 mm dia.

Insulation:XLPE (Cross-linked Polyethylene)

Power rating:800 MVA

Route length:165 km(75 subsea · 90 land)

Weight:34 kg/m air

Burial depth:

DolWin1 sea cables were buried into the seabed with normal trenching depths of about 1.5–3 m and deeper protection measures (up to ~5 m burial) used at shipping lanes; cable...

DolWin alpha – Trianel Windpark Borkum (Borkum West II) AC connection

155 kV HVAC · 7.5 km

System:155 kV HVAC

Route length:7.5 km(7.5 subsea · 0 land)

Burial depth:

ABB project documentation for the DolWin1 sea cables describes normal sea-cable trenching and burial depths of approximately 1.5–3 m, with deeper burial (up to ~5 m) used at shipping lanes;...

DolWin alpha – Borkum Riffgrund 1 AC connection

Hilgenriedersiel, Lower Saxony, Germany

1 × 155 kV HVAC · 200 MVA

System:1 × 155 kV HVAC

Power rating:200 MVA

Burial depth:

ABB project documentation for DolWin1 states the submarine export cables were buried into the seabed with normal trenching depths of about 1.5–3 m, and in high‑risk areas (shipping lanes) burial...

DolWin alpha – MEG 1 (MEG Offshore 1 / Merkur Offshore) AC connection

1 × 155 kV HVAC

System:1 × 155 kV HVAC

Burial depth:

On DolWin1 the subsea cable routes (including AC collection / inter-platform cables to the DolWin alpha platform) were buried into the seabed using mechanical trenching. ABB reporting for the project...

Converter Stations

DolWin alpha

DolWin alpha (offshore converter platform, DolWin cluster, North Sea), Germany

VSC · 800 MW 320 kV · offshore

Converter:vsc

Rating:800 MW · 320 kV

Location:offshore

Dörpen West (Dörpen‑West) onshore converter station

Dörpen West (Dörpen‑West) / Heede, Germany

VSC · 800 MW 320 kV · onshore

Converter:vsc

Rating:800 MW · 320 kV

Location:onshore