Litgrid and PSE Signed Harmony Link Agreement
The operators finalized a key connection deal to integrate Baltic and European electricity grids.
Updated on Oct. 9, 2026 in Utilities
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Litgrid and PSE have signed a connection point agreement for the Harmony Link electricity interconnector, a project critical for synchronizing Baltic grids with Continental Europe. The agreement outlines technical requirements and responsibilities for the new 220 kV transmission line.
Why it matters
This infrastructure project is designed to integrate renewable energy sources and expand electricity trading capacity between Lithuania and Poland. It holds status as a project of special state importance and receives support through the European Union.
The project features a 220 kV transmission line with an interconnection point situated 35 meters inside Polish territory. PSE will acquire the cable section located within Poland from its Lithuanian counterpart, Litgrid.
The players
Litgrid
Litgrid is the electricity transmission system operator for Lithuania.
PSE
PSE serves as the transmission system operator for the Polish electricity grid.
The details
The development utilizes a mix of overhead lines and cable sections to span the distance between the two nations. Onshore work in Lithuania is set to impact the Vilkaviškis District, Kalvarija, and Marijampolė municipalities.
Timeline
Construction on the Lithuanian portion is scheduled to begin in the second quarter of 2027.
The full interconnector is planned for commissioning by December 31, 2030.
Market Landscape
The Harmony Link project accelerates the ongoing integration of regional energy markets across the European Union. This consolidation strengthens the bargaining power and stability of the Baltic energy sector against external supply volatility.
The project aims to lower long-term energy costs by increasing the reliability and volume of electricity trading. Consumers in the region will benefit from greater grid synchronization and increased access to diversified renewable energy sources.
The takeaway
This interconnector represents a major step toward unifying European energy markets to ensure greater security. Integrating Baltic systems with Continental Europe provides a path toward more resilient and efficient renewable energy distribution.
Further reading
Learn more about the latest developments in Utilities infrastructure.
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