All transition pieces connecting foundations and turbines installed at the Baltic Power offshore wind farm

Baltic Power offshore wind farm – a joint venture project of ORLEN Group and Northland Power – confirmed successful installations of all 76 transition pieces which connect foundations with wind turbines. The installation campaign of wind turbines, as well as export and inter-array cables is progressing over 23 km off the Polish coast.

Reaching the milestone of installing all transition pieces means that we are concluding the main works for the foundation package, achieved through the significant effort of multiple members from foundations, installation and construction teams, among many others. It is worth mentioning that the fabrication of transition pieces was executed with a valuable input of local factories in Żary, Niemodlin and Łęknica, which provided secondary steel for these massive structures, using steel mostly sourced from Polish mills – comments Piotr Ostrowski, Project Director and Board Member of Baltic Power.

📹 Watch our vlog from Niemodlin secondary steel factory: https://youtu.be/XFlisQcppNM?si=n06DutsRjZByWWMk

Transition Pieces (TPs) connect monopile foundations with Baltic Power’s wind turbines and offshore substations. Each bespoke structure measures approximately 20 meters high and weighs up to 350 tons. Besides the main cylindrical structure, they are equipped with boat landings which are used by crew transfer vessels to safely disembark technicians for service and maintenance works on the turbine, davit cranes for the safe transfer of tools and parts as well as internal electrical systems to support the wind turbines.

For this phase of the installation campaign, our contractor Van Oord deployed a heavy lift vessel capable of transporting up to four transition pieces per voyage, significantly improving installation efficiency offshore. The vessel is equipped with twin cranes with a combined lift capacity of 2,000 tonnes, enabling the safe and precise handling of large transition pieces during offshore installation. Using a dynamic positioning system, the vessel can maintain exact position alongside the pre-installed monopiles without the need for anchors or jack up systems. Heavy lift installation is a critical phase in offshore wind construction. Handling structures of this size requires highly specialised vessels and lifting equipment capable of maintaining stability and accuracy offshore. The ability to transport multiple transition pieces and install them in increased sea states helps optimise vessel time offshore and supports the efficient delivery of the Baltic Power wind farm adds Nick Ingham, Deputy EPCI Director at the Baltic Power project.

📹 Learn more about installation of transition pieces: https://www.linkedin.com/feed/update/urn:li:activity:7341080752626774016

While all major foundation package works are concluded, the offshore construction area remains busy, as approximately 20 vessels operate daily installing wind turbines, offshore export cables and inter‑array cables. The commissioning works at the already installed +30 turbines and both offshore substations are progressing as well. Over 80 vessels and 4500 crew members, technicians, contractors and Baltic Power team members were involved in the installation campaign that is scheduled to conclude in the 2nd half of 2026.

Baltic Power is the most advanced offshore wind project in Poland and the first to commence offshore installations. Once construction of the ~1,2 GW offshore wind farm is completed, up to 4 TWh of electricity will be generated annually, which stands for 3% of the current national demand. The farm is located approximately 23 km from the shore near Choczewo and Łeba, covering an area of 130 square kilometers. Baltic Power is scheduled to become operational in the second half of 2026.