HelWin2

Offshore GridOperationalDE690 MW320 kV130.02 km

Basic Information

Also known as:NOR-4-2

Status:Operational

Capacity:690 MW

Transmission Model:TSO Build & Own

Owners:

TenneT(100%)

Project Company:

TenneT TSO GmbH

Type:offshore grid

Expected Life:40 years

Website:www.tennet.eu

Description:

HelWin2 is a TenneT-owned offshore HVDC grid connection that evacuates power from wind farms in the HelWin cluster to the German onshore transmission system. The link uses Siemens VSC (HVDC Plus) technology and Prysmian extruded XLPE cables to transmit up to 690 MW at ±320 kV over a roughly 130...

Supply Chain (0)

Project Timeline (0)

No lifecycle events recorded yet.

	German Bight (North Sea)	Schleswig-Holstein
Landfall	N/A	Büsum, Schleswig-Holstein, Germany
Grid Connection	—	Büttel converter station (380 kV)

Cable Specifications

HelWin2 HVDC export link (HelWin Beta – Büttel)

Büsum, Schleswig-Holstein, Germany

2 × 320 kV HVDC · bipole · copper · XLPE (Cross-linked Polyethylene) · 690 MVA · 130 km

System:2 × 320 kV HVDC · bipole

Construction:copper

Insulation:XLPE (Cross-linked Polyethylene)

Power rating:690 MVA

Route length:130 km(85 subsea · 45 land)

Burial depth:

The submarine export cable is described in project sources as being buried where feasible, with typical burial targets in the German North Sea on the order of about 1–2 m...

Fibre optic:

Project documentation and supplier material state the export cable system supplied/installed by Prysmian included a fibre‑optic provision (references to a 'fibre optic cable system' for the HelWin2 connection and to...

Amrumbank West – HelWin Beta 155 kV HVAC export cable

Büsum, Schleswig-Holstein, Germany

2 × 155 kV HVAC · bipole · copper · XLPE (Cross-linked Polyethylene) · 690 MVA

System:2 × 155 kV HVAC · bipole

Construction:copper

Insulation:XLPE (Cross-linked Polyethylene)

Power rating:690 MVA

Burial depth:

Prysmian/TenneT project documentation and technical summaries for HelWin2 describe the export cables as buried where feasible and protected/armoured for marine hazards. Typical submarine burial target depths cited for the HelWin2-style...

Fibre optic:

Project and supplier (Prysmian) publications indicate the HelWin2 cable system was delivered with fibre‑optic capability as part of the turnkey export cable systems: the Prysmian scope and later technical summaries...

Kaskasi – HelWin Beta 155 kV HVAC export cable

Büsum, Schleswig-Holstein, Germany

1 × 155 kV HVAC · bipole · copper · XLPE (Cross-linked Polyethylene) · 690 MVA

System:1 × 155 kV HVAC · bipole

Construction:copper

Insulation:XLPE (Cross-linked Polyethylene)

Power rating:690 MVA

Burial depth:

Prysmian / project reporting for HelWin2 indicates the submarine export cables were buried where feasible, with typical target burial depths in the German North Sea of roughly 1–2 metres. Some...

Fibre optic:

Project and supplier material for HelWin2 indicate Prysmian supplied turnkey cable systems that include fibre‑optic capability as part of the export and associated HVAC submarine cables. The fibre provision is...

HelWin Alpha – HelWin Beta inter‑platform link (Feltoflex 155 kV)

1 × 155 kV HVAC · copper 400 mm² · EPR (Ethylene Propylene Rubber) · 0.02 km

System:1 × 155 kV HVAC

Construction:copper · 400 mm²

Insulation:EPR (Ethylene Propylene Rubber)

Route length:0.02 km(0.02 subsea)

Burial depth:

This segment is an inter‑platform, short flexible power jumper used to link the HelWin Beta platform with the adjacent HelWin Alpha/neighboring platform (platform‑to‑platform tie). Industry sources describe the interconnection as...