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.