SylWin1

Offshore GridOperationalDE864 MW320 kV205 km

Basic Information

Also known as:SylWin 1, SylWin1 offshore grid connection, SylWin1 HVDC link, Netzanbindung SylWin1

Status:Operational

Capacity:864 MW

Transmission Model:TSO Build & Own

Owners:

TenneT(100%)

Project Company:

TenneT TSO GmbH

Type:offshore grid

Website:www.prysmian.com

Description:

SylWin1 is an HVDC offshore grid connection developed to evacuate power from multiple North Sea wind farms to the German onshore transmission network. The link collects generation from the DanTysk, Butendiek and Sandbank offshore wind parks and transmits up to 864 MW of renewable electricity using voltage‑sourced converter (VSC) HVDC...

Supply Chain (0)

Project Timeline (0)

No lifecycle events recorded yet.

Route

	North Sea	Schleswig-Holstein
Landfall	N/A	Büsum, Schleswig-Holstein, Germany
Grid Connection	—	Büttel onshore converter station / Büttel substation

North Sea

Landfall:N/A

Grid:—

Schleswig-Holstein

Landfall:Büsum, Schleswig-Holstein, Germany

Grid:Büttel onshore converter station / Büttel substation

Financial

€500M€629.5M adj.€3.55k/MW-km

www.promotion-offshore.net (Jan 2011)

CAPEX:€500M

Adjusted to 2025¹:€629.5M

Cost Intensity¹:€3.55k per MW-km

Estimate Date:Jan 2011

Source:www.promotion-offshore.net

Notes:

Reported contract award value of €500 million to the Siemens/Prysmian consortium for SylWin1 (interpreted as the transmission/cable contract value).

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

Cable Specifications

SylWin1 HVDC export cable

Büsum, Schleswig-Holstein, Germany

2 × 320 kV HVDC · bipole · XLPE (Cross-linked Polyethylene) · 864 MVA · 205 km

System:2 × 320 kV HVDC · bipole

Insulation:XLPE (Cross-linked Polyethylene)

Power rating:864 MVA

Route length:205 km(160 subsea · 45 land)

Burial depth:

SylWin1 comprises a long submarine export route from the SylWin alpha platform to land plus an onshore land cable section; sources explicitly describe a submarine section of roughly 160 km...

Fibre optic:

The SylWin1 cable system includes fibre‑optic provision: project announcements and supplier/contractor press material state the cable system comprises fibre optic cable(s) used for signalling and communication between offshore and onshore...

SylWin1 – DanTysk HVAC link (155 kV)

155 kV HVAC · XLPE (Cross-linked Polyethylene) · 288 MVA

System:155 kV HVAC

Insulation:XLPE (Cross-linked Polyethylene)

Power rating:288 MVA

Fibre optic:

Project sources state that the submarine AC cable connections in the SylWin cluster include fibre‑optic cables for signalling/communication purposes; tender documents and Prysmian/press material note inclusion of fibre in the...

SylWin1 – Butendiek HVAC link (155 kV)

155 kV HVAC · XLPE (Cross-linked Polyethylene) · 288 MVA

System:155 kV HVAC

Insulation:XLPE (Cross-linked Polyethylene)

Power rating:288 MVA

Fibre optic:

Project-level documentation for SylWin1 states the cable system includes fibre optic cable(s) for signalling and communications between platforms and to shore; the inter-platform (155 kV HVAC) submarine connections are described...

SylWin1 – Sandbank HVAC link (155 kV)

155 kV HVAC · XLPE (Cross-linked Polyethylene)

System:155 kV HVAC

Insulation:XLPE (Cross-linked Polyethylene)

Route length:0 km land

Fibre optic:

Project documentation and press releases state the SylWin1 cable system includes a fibre-optic cable for signalling and communications between offshore platforms and the onshore station. Sources do not specify the...