About the project
Harmony Link is a new submarine interconnection between Lithuania and Poland. It is the largest project of synchronisation of the Baltic States with the Continental European Synchronous Area.
The approximately 330 km total length of 700 MW submarine and onshore high-voltage direct current (HVDC) cable will connect the Žarnoviec substation of Poland with the Darbėnai substation of Lithuania. Construction of the interconnection is expected to be completed in 2025.
It will be the second electricity interconnection between Poland and Lithuania – since 2016, the LitPol Link has been in operation.
Key facts
The largest project of Baltic states synchronisation
Length:
330 km
Power:
700 MW
Investments:
EUR 680 million
Benefits
Cornerstone of the Baltic states synchronisation
Harmony Link is an essential prerequisite for the synchronisation of the electricity transmission systems of Lithuania, Latvia, and Estonia with the Continental European Synchronous Area (CESA).
The construction of the new maritime interconnection will significantly strengthen the energy security of Baltic States, increase the capacity of the electricity grid for local consumers, encourage investment in the region, etc.

About Harmony Link
News
2021-10-08
LITGRID AND PSE COMPLETED A SIGNIFICANT SEABED SURVEY
Litgrid along with PSE Polish Power System Operator prepares the largest…
2021-08-18
Litgrid has announced the procurement of a Harmony Link interconnection cable
Implementing the largest synchronisation program project Harmony Link and…
2021-05-31
Litgrid and PSE approved the investment decisions for the Harmony Link
Litgrid and PSE, transmission system operators of Lithuania and Poland, both…