On February 9, 2025, at 12:05:30 UTC, the Baltic electricity grid officially synchronized with the Continental European Synchronous System (CESS). This milestone is more than just a technical achievement – it strengthens Europe’s energy security, enhances grid stability and marks a step towards a more resilient, renewable-powered future.

Congratulations to our partners at Augstsprieguma tīkls AS, Elering, Litgrid and Polskie Sieci Elektroenergetyczne S.A. for their dedication and technical excellence in achieving this historic milestone. We are proud of our long-term collaboration with the Baltic TSOs.

The Synchronization in Action
Ever wondered how a grid synchronization looks in real-time? The graph below illustrates the frequency dynamics during the synchronization period, showcasing the seamless transition of the Baltic grid as it aligned with the Continental European frequency.
Data Source: Gridradar (gridradar.net).

Win-Win-Situation:

• Enhanced Grid Stability: A larger interconnected system reduces frequency fluctuations and improves overall system stability.
• Support for Renewable Energy: Greater integration helps manage the variability of renewables, ensuring smoother transitions as Europe moves toward a greener future.
• Resilience in Emergencies: The CESS is now even more robust against incidents like the Estlink 2 outage (December 25, 2024) and system splits experienced in 2021.