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Home/Grid/Grid developement/Offshore projects/Ostwind 3

Ostwind 3

The designated wind farm area Windanker is located in the area Westlich Adlergrund, north of the operating wind farms Wikinger and Arkona connected by  50Hertz under Ostwind 1. The wind farm area Windanker is 25 square kilometres in size and is to be built and operated by the Spanish company Iberdrola Renovables with its German subsidiary Windanker GmbH.

Other than for Ostwind 1 and Ostwind 2, Ostwind 3 will only link a single grid connection system (OST-1-4, see map) to the wind farm Windanker. For Ostwind 1, three grid connection systems were linked to the 50Hertz transmission system.

Three other grid connections are currently being built for Ostwind 2. With the connection of the wind Windanker, a capacity of 300 megawatts (MW) will be supplied in the future. This is enough electricity for around 260,000 households. Unlike previous 50Hertz grid connection projects, the offshore substation is also planned, constructed and operated by 50Hertz in addition to the connection.


Line route


An onshore cable system of about five kilometres in length will run south of Lubmin city from a new substation to be constructed in the Lubmin/Brünzow/Wusterhusen and Kemnitz survey area to the landing point in the port area of Vierow. From there on, a submarine cable of around 100 kilometres is planned which leads to the offshore substation in wind farm Windanker. You can find out more about the 50Hertz offshore substation here.

You can find more about the project and the current planning status under “Status”.

Overview of grid connection
Location of the area Westlich AdlergrundApproximately 42 kilometres north-east of Rügen
Capacity:Alternating voltage level:300 megawatts (MW)220 kilovolts (kV)
Cable length off-/onshoreApproximately 100 kilometres / approximately 5 kilometres
Onshore grid connection pointNew substation to be constructed (location being surveyed)
Operator of the cables and the offshore substation50Hertz Transmission GmbH
Status of the approval proceduresPosition of the Ministry of Energy, Infrastructure and Digitalisation of Mecklenburg-Western Pomerania on testing the need for a regional planning procedure (12 nautical mile zone and on shore)
Expected date of completion within the meaning of § 17d (2) sentence 1 of the German energy industry act (Energiewirtschaftsgetsetz, EnWG)
30/09/2026
CONTACT

Yvonne Post

Public participation
  • Tel:
    +49 30 5150-3093
  • E-Mail:
    yvonne.post@50hertz.com
Line route

An onshore cable system of about five kilometres in length will run south of Lubmin city from a new substation to be constructed in the Lubmin/Brünzow/Wusterhusen and Kemnitz survey area to the landing point in the port area of Vierow. From there on, a submarine cable of around 100 kilometres is planned which leads to the offshore substation in wind farm area O-1.3. You can find out more about the 50Hertz offshore substation here.

Offshore route

In order to minimise the impact on the environment, it is important to keep the length of the cable as short as possible and, if possible, bundle it with existing cables. For this reason, 50Hertz is planning to install about two thirds of the submarine cable system in parallel with the existing lines of projects Ostwind 1 and 2. The 220-kV sea cable transports the electricity generated in the wind farm from the Exclusive Economic Zone (EEZ) through the coastal waters and the Greifswalder Bodden to the so-called landing point in the port area around Vierow. The port area of Vierow is located in the municipality of Brünzow in the district of Vorpommern-Greifswald in the state of Mecklenburg-Western Pomerania. The landing point is where the sea cable meets land.

Onshore route

From the landing point in the port area of Vierow, the electricity generated at sea is transported further via land cable to the onshore substation. The land cable of around five kilometres in length is laid as an underground cable. The land cable route should run as straight as possible and is subject to a number of spatial planning criteria. Intersections with other lines, buildings, residential areas, streets and gas lines shall for instance be avoided as much as possible. Nature conservation areas and forests shall also be avoided.

Here you can find more information about the construction method.

Onshore substation

For the Ostwind 3 grid connection project, 50Hertz is planning to build a new substation, in which the current will be transformed from 220 kilovolts (kV) to 380 kV.  The existing substation in the neighbouring municipality of Lubmin no longer offers the possibility to connect additional sea cables. Due to lack of additional space, this is not possible. Furthermore, technical grid aspects play an important role here: the connection of an additional system to this site, which already has two offshore grid connections, would pose a considerably larger risk of disturbances and system outages.

After a detailed examination, a new substation will therefore be built for the grid connection. For the onshore grid connection, the survey area in the municipalities Lubmin/Brünzow/Wuhsterhusen and Kemnitz was specified in Grid Development Plan 2030 (2019). Within this area, an extensive and careful examination of many different criteria will be performed to decide on the final location. The site should, for instance, be located outside of nature conservation areas and drinking water protection zones as far as possible. The distance to residential and settlement areas shall also be taken into account. The traffic connection of the substation shall also be possible via suitable streets and rails. Moreover, the existing 50Hertz extra high-voltage grid, in this case a 380-kV overhead line, shall also be nearby, so that the substation can be connected to the 50Hertz grid. This way, the connection of additional lines is avoided.

Permitting

Different permits are needed for the creation of the grid connection. The legal requirements are arranged in the draft area development plan 2020 (Flächenentwicklungsplan, FDP) according to the stipulations of the German offshore wind energy act (Windenergie-auf-See-Gesetz, WindSeeG) as well as in the grid development plan for electricity 2030 (Netzentwicklungsplan (NDP) 2019-2030).

Permits for offshore route and offshore substation

The submarine cable runs through different areas of competence of permitting and specialist authorities. For the German Exclusive Economic Zone (EEZ) in the Baltic Sea, the federal government and therefore the Federal Maritime and Hydrographic Agency (Bundesamt für Seeschiffahrt und Hydrographie, BSH) is the competent permitting authority. The EEZ is the area beyond the coastal waters (12 nautical mile zone) up to a theoretical maximum of 200 nautical miles. The planning approval procedure (Planfeststellungsverfahren, PFV) for the EEZ will cover the route section and offshore substation located there. In the German EEZ, offshore substations must furthermore undergo a certification process of the BSH. This leads to the fourth and final approval - the approval for operation. The Federal Maritime and Hydrographic Agency specifies the exact location of the offshore substation within the wind farm Windanker. At a water depth of 42.7 metres, 50Hertz will for the first time plan, construct and operate the offshore substation itself as the project developer. Here you can find more information about the construction method.

The offshore route runs from the German Exclusive Economic Zone to the coastal waters. For the coastal waters, the federal states (in this case, Mecklenburg-Western Pomerania) are competent. For the submarine cable in the coastal waters, a planning approval procedure (PFV) is also required. The competent authority is the Ministry for Ministry of Economy, Infrastructure, Tourism and Labour of Mecklenburg-Western Pomerania.

In order to minimise the impact on the environment, it is important to keep the length of the cable as short as possible and to bundle the new route with other lines. For this reason, 50Hertz is planning to install the submarine cable system as much in parallel as possible with the existing lines of projects Ostwind 1 and 2. In 2015, the formerly Ministry for Energy, Infrastructure and Digitalisation of Mecklenburg-Western Pomerania (today Ministry of Economy, Infrastructure, Tourism and Labour) issued the planning approval decision for each of the three submarine cable systems of Ostwind 1 and Ostwind 2 in the coastal waters.

Because the submarine cable system of Ostwind 3 will for the most part run in parallel with the other grid connection systems of Ostwind 1 and 2, 50Hertz made an application to the Ministry for Economy, Infrastructure, Tourism and Labour of Mecklenburg-Western Pomerania to review the necessity of a spatial planning procedure for the “grid connection area O-1.3” project. As a result, the competent authority decided that no spatial planning procedure was necessary.

The planning approval procedure is a detailed permit review in which the building permit for the project is issued as well. Simply put, the planning approval procedure primarily deals with the “how” of the construction project (specification of the location, structures, technical implementation). During the permit procedure, the public is formally involved in accordance with the legal requirements. 50Hertz supports this with informal public participation, also known as citizen dialogue. Citizen dialogue builds on 50Hertz's own experiences, not on legal stipulations. This difference is important, as the citizen dialogue ends where the formal public participation laid down by law begins (see also Transparency and public participation).

Permit for the offshore substation

The electricity that is generated offshore by the future offshore wind farm is collected at the offshore substation and brought to the mainland by means of a submarine cable of 220 kilovolt alternating current.

For the first time, 50Hertz is planning, applying for and constructing an offshore substation itself as project developer. The permit process is part of the planning approval procedure for the submarine cable in the German Exclusive Economic Zone. The Federal Maritime and Hydrographic Agency (Bundesamt für Seeschifffahrt und Hydrographie, BSH) is competent for the permit. In the German Exclusive Economic Zone, offshore substations must furthermore undergo a certification process of the BSH. This leads to the fourth and final approval - the approval for operation.

In principle, the planning approval decision contains a number of ancillary provisions to ensure that the construction and operation do not adversely affect the safety of the marine environment as well as ship and air traffic.

During the permit procedure, the public is formally involved in accordance with the legal requirements. 50Hertz supports this with informal public participation, also known as citizen dialogue. Citizen dialogue builds on 50Hertz's own experiences, not on legal stipulations. This difference is important, as the citizen dialogue ends where the formal public participation laid down by law begins (see also Transparency and public participation).

Permit for the onshore route

The point where the submarine cable first reaches land is called the landing point. It marks the transition from sea to land. From the landing point, the electricity generated at sea is transported to the onshore substation by means of an underground cable running along the onshore route. First, 50Hertz made an application for the Ostwind 3 project to the Ministry for Economy, Infrastructure, Tourism and Labour of Mecklenburg-Western Pomerania for a review of the need for a spatial planning procedure for the “grid connection area O-1.3” project. This review studies whether the project is in conformity with the state’s spatial planning. As a result, the competent authority decided that no spatial planning procedure was necessary.

For the permit for the onshore route, 50Hertz is preparing the application documents for a planning approval procedure at the competent Ministry for Economy, Infrastructure, Tourism and Labour of Mecklenburg-Western Pomerania. The planning approval procedure is a detailed permit review in which the construction permit for the project is issued as well. Simply put, the planning approval procedure primarily deals with the “how” of the construction project (specification of the location, structures, technical implementation).

The formal public participation is laid down by law. In this case, the legally responsible authorities shall be involved. During the permit procedure, the public is formally involved in accordance with the legal requirements. 50Hertz supports this with informal public participation, also known as citizen dialogue. Citizen dialogue builds on 50Hertz's own experiences, not on legal stipulations. This difference is important, as the citizen dialogue ends where the formal public participation laid down by law begins (see also Transparency and public participation).

Permit for onshore substation

The submarine cable of 220 kilovolt (kV) alternating current is connected to the German extra-high-voltage transmission grid by means of a substation. The necessary transformation from the voltage level of 220 to 380 kV takes place in this substation. Because the submarine cable cannot reach land at the existing Lubmin substation for capacity and grid-technical reasons, 50Hertz must build a new substation for this purpose. In order to connect it with the existing overhead line, a so-called double tap point is necessary.

First, 50Hertz made an application for the Ostwind 3 project to the Ministry for Economy, Infrastructure, Tourism and Labour of Mecklenburg-Western Pomerania for a review of the need for a spatial planning procedure for the “grid connection area O-1.3” project. This review studies whether the project is in conformity with the state’s spatial planning. As a result, the competent authority decided that no spatial planning procedure was necessary.

For the construction of the new substation, 50Hertz will launch a planning approval procedure with the competent permit authority, the Ministry for Economy, Infrastructure, Tourism and Labour of Mecklenburg-Western Pomerania, in late December. The planning approval procedure is a detailed permit review in which the construction permit for the project is issued as well. Simply put, the planning approval procedure primarily deals with the “how” of the construction project (specification of the location, structures, technical implementation).

The formal public participation is laid down by law. In this case, legally responsible authorities such as the State Agency for Agriculture and Environment of Western Pomerania (Staatliches Amt für Landswirtschaft und Umwelt Vorpommern, StaLU Vorpommern) shall be involved. As a rule, the planning approval procedure takes 12 to 24 months.

The so-called tap point must be applied for in the planning approval procedure. The tap point is needed to feed the electricity generated by the offshore wind farm into the existing transmission grid of 50Hertz. It forms the connection between the existing overhead line grid and the substation. The tap point is installed as an overhead line. The permitting process follows section 43 of the German energy industry act (Energiewirtschaftsgesetz, EnWG).

During the permit procedure, the public is formally involved in accordance with the legal requirements. 50Hertz supports this with informal public participation, also known as citizen dialogue. Citizen dialogue builds on 50Hertz's own experiences, not on legal stipulations. This difference is important, as the citizen dialogue ends where the formal public participation laid down by law begins (see also Transparency and public participation).

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