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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.

Ostwind 3 is the third offshore project for the grid connection of the wind farm areas to the north-east of Rügen island (see also Ostwind 1 and Ostwind 2 ). In 2005, the Federal Maritime and Hydrographic Agency (BSH) designated the area called ‘Westlich Adlergrund’ as a particularly suitable area for the construction of wind turbines. It has a surface of 109.2 square kilometres and is located in the German Exclusive Economic Zone (EEZ) of the Baltic Sea, i.e. beyond the 12 nautical mile zone designated as coastal waters. It is located at about 42 kilometres from the closest coast of Rügen island, and some 100 kilometres from the transition point between the submarine and land cable in the Vierow port area near Lubmin.


The designated wind farm area O-1.3 is located in the Westlich Adlergrund area, north of the operational wind farms Wikinger and Arkona that are part of the 50Hertz grid connection project Ostwind 1. The Windanker wind farm area has a size of 25 square kilometres and will be developed and operated by the Spanish company Iberdrola Renovables, together with its German subsidiary Windanker GmbH.


With the connection of Windanker wind farm area, a capacity of 300 megawatts (MW) will be supplied in the future. That is why only one grid connection system will be installed for Ostwind 3 (OST-1-4, see map). This is enough electricity for around 260,000 households. Other than for previous 50Hertz grid connection projects, 50Hertz will not only plan, construct and operate the connection but also the offshore substation.

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 expected to be constructed in Stilow
Operator of the cables and the offshore substation50Hertz Transmission GmbH
Status of the approval proceduresA total of three planning approval procedures are to be completed. These concern the cable sections (1) in the German Exclusive Economic Zone or EEZ (incl. offshore substation), (2) in the coastal waters and (3) on land (incl. substation and tap point);

To (1) submission of the application documents for the planning approval procedure in the EEZ in June 2022 (incl. transformer platform), to (2) and (3) start of the further procedures still in preparation
Expected date of completion within the meaning of § 17d (2) sentence 1 of the German energy industry act (Energiewirtschaftsgesetz, EnWG)30/09/2026
CONTACT

Yvonne Post

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

Status Ostwind 3

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 underground cable route should run as straight as possible but is nevertheless subject to a number of spatial planning criteria. Intersections with other lines, buildings, residential areas, streets and gas mains shall for instance be avoided as much as possible. Nature conservation areas and forests shall also be circumvented.

Here you can find more information about the construction method.

Onshore substation

For the Ostwind 3 point of common coupling project, 50Hertz is planning to build a new substation, where the current will be transformed from 220 kilovolts (kV) to 380 kV. As there is not enough space, the existing substation in the neighbouring municipality of Lubmin no longer offers the possibility to connect additional submarine cables. Additionally, 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

The construction, expansion and conversion of electricity lines are infrastructural measures that affect many interested parties, like agriculture and nature conservation. That is why the legislator has clearly arranged the processes for the planning and approval, for example in the German Energy Industry Act (Energiewirtschaftsgesetz). The Ostwind 3 grid connection project was first confirmed 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 (GDP 2019-2030) and continuously since then. Ostwind 3 is divided into three approval sections, for which separate permits need to be obtained.

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 multilevel 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 of Economics, 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.

As the Ostwind 3 submarine cable system will mostly run parallel to the other grid connection systems (Ostwind 1 and 2), 50Hertz has demonstrated to the Ministry of Economics, Infrastructure, Tourism and Labour of Mecklenburg-Western Pomerania that the land use aspects are respected and that a spatial planning procedure is therefore not required. If necessary, the spatial planning interests can be adequately handled in the planning approval procedure.

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 multilevel 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. 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 demonstrated to the Ministry of Economics, Infrastructure, Tourism and Labour of Mecklenburg-Western Pomerania that for the Ostwind 3 project, the land use aspects are respected and a spatial planning procedure is therefore not required. If necessary, the spatial planning interests can be adequately handled in the planning approval procedure.

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 of the voltage level from 220 to 380 kV takes place in this substation. Because the submarine cable cannot reach land at the existing Lubmin substation due to lack of space and for 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 demonstrated to the Ministry of Economics, Infrastructure, Tourism and Labour of Mecklenburg-Western Pomerania that for the Ostwind 3 project, the land use aspects are respected and a spatial planning procedure is therefore not required. If necessary, the spatial planning interests can be adequately handled in the planning approval procedure.

For the construction of the new substation, 50Hertz will launch a planning approval procedure with the competent permit authority, the Ministry of Economics, Infrastructure, Tourism and Labour of Mecklenburg-Western Pomerania, in late December. 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).

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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