Crete-Attica Electrical Interconnection

The Crete-Attica Electrical Interconnection project currently comprises the largest energy transmission investment in Greece, aiming to end Crete’s “electrical isolation”, through its connection to mainland Greece’s power grid, and meet the island’s increasing future needs.

Route of the Electrical Interconnection Project

The route for the Electrical Interconnection begins at the Attica Converter Station (AC/DC), near Koumoundouros Extra-High Voltage Center (EHVC). From there, two (2) HVDC cables are installed underground to the landing point at Pachi, Megara.

At Pachi, the two (2) cables are laid underwater and continue their subsea journey to the landing point at Korakia, Crete.

From Korakia, the two (2) cables proceed to the Damasta Converter Station (DC/AC), and finally, where the connection to Crete’s grid is completed through the new GIS substation.

For the system’s operation, two (2) electrode stations are installed: one on the islet of Stachtoroi in Attica and the other in Korakia, Heraklion (Crete).

The Crete-Attica interconnection is ranked among the “top 5” most innovative DC interconnection projects in Europe.

Specifically:

• It utilizes 500 kV DC voltage and the latest technology (Voltage Source Converter - VSC).
• It is the first DC interconnection in the Mediterranean to utilize advanced VSC converter technology.
• It ranks in the top 3 of the world’s deepest submarine interconnections.
• It represents the world’s largest-capacity island interconnection (1,000 MW), alongside Sardinia.
• It is the only interconnection where Europe’s top cable manufacturers have joined forces.