Ostwind 2

Offshore GridOperationalDE750 MW220 kV286 km

Basic Information

Also known as:Ostwind2, Ostwind 2 grid connection, OST-2-1, OST-2-2, OST-2-3

Status:Operational

Capacity:750 MW

Transmission Model:TSO Build & Own

Owners:

50Hertz Transmission GmbH(100%)

Project Company:

50Hertz Transmission GmbH

Type:offshore grid

Website:www.50hertz.com

Description:

Ostwind 2 is the 50Hertz Transmission grid connection system that links two Baltic Sea offshore wind farms—Arcadis Ost 1 (Parkwind) and Baltic Eagle (Iberdrola)—to the German extra-high-voltage network at the Lubmin substation. The connection is implemented as three 220 kV AC submarine export cable systems (designated OST-2-1, OST-2-2 and OST-2-3)...

Supply Chain (0)

Project Timeline (0)

No lifecycle events recorded yet.

Route

	Baltic Sea (Westlich Arkonasee cluster)	Mecklenburg-Vorpommern
Landfall	N/A	Lubmin, Mecklenburg-Vorpommern, Germany
Grid Connection	—	Lubmin substation

Baltic Sea (Westlich Arkonasee cluster)

Landfall:N/A

Grid:—

Mecklenburg-Vorpommern

Landfall:Lubmin, Mecklenburg-Vorpommern, Germany

Grid:Lubmin substation

Financial

€550M€683.8M adj.€3.19k/MW-km

www.offshore-energy.biz (Nov 2018)

CAPEX:€550M

Adjusted to 2025¹:€683.8M

Cost Intensity¹:€3.19k per MW-km

Estimate Date:Nov 2018

Source:www.offshore-energy.biz

Notes:

Approx. €550 million for the export/onshore cable scope (NKT supply ≈€300m; Boskalis installation in excess of €250m). This represents the cable supply+installation contract value, not the full TSO (50Hertz) grid-connection...

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

Cable Specifications

OST-2-1 (Arcadis Ost 1 export cable)

Lubmin, Mecklenburg-Vorpommern, Germany

1 × 220 kV HVAC · copper · XLPE (Cross-linked Polyethylene) · 250 MVA · 90 km · 120 kg/m

System:1 × 220 kV HVAC

Construction:copper

Insulation:XLPE (Cross-linked Polyethylene)

Power rating:250 MVA

Route length:90 km(3 land)

Weight:120 kg/m air

Burial depth:

50Hertz and contractors performed standard seabed preparation and burial measures for the Ostwind 2 export systems: subsea sections are laid on the seabed and then buried where possible using ploughing/trenching...

Fibre optic:

Project documentation and contractor descriptions indicate the export cable system route includes fibre optic provisions for messaging/telemetry and communications (light‑wave/optical fibres drawn into protection ducts or accommodated within cable systems...

OST-2-2 (Baltic Eagle export cable - system 1)

Lubmin, Mecklenburg-Vorpommern, Germany

1 × 220 kV HVAC · copper · XLPE (Cross-linked Polyethylene) · 250 MVA · 98 km · 120 kg/m

System:1 × 220 kV HVAC

Construction:copper

Insulation:XLPE (Cross-linked Polyethylene)

Power rating:250 MVA

Route length:98 km(95 subsea · 3 land)

Weight:120 kg/m air

Burial depth:

Burial depth varies along the route and is determined by seabed geology and water depth; 50Hertz and project contractors used a mix of survey-led seabed preparation, ploughing/trenching and targeted burial...

OST-2-3 (Baltic Eagle export cable - system 2)

Lubmin, Mecklenburg-Vorpommern, Germany

1 × 220 kV HVAC · copper · XLPE (Cross-linked Polyethylene) · 250 MVA · 98 km · 120 kg/m

System:1 × 220 kV HVAC

Construction:copper

Insulation:XLPE (Cross-linked Polyethylene)

Power rating:250 MVA

Route length:98 km(95 subsea · 3 land)

Weight:120 kg/m air

Burial depth:

Burial practices vary along the route and were determined by seabed surveys and local geology. 50Hertz and contractors performed seabed preparation, pre-lay surveys and used trenching/ploughing where appropriate; sections were...