International interconnections at the centre of IPTO’s Ten-Year Development Plan 2024-2033

The updated version of the Preliminary Plan of the Ten-Year Development Plan incorporates for the first time specific technical parameters of the new cross-border interconnections with Italy and Albania

The strengthening of international interconnections and domestic electricity transmission infrastructures remain the top strategic priorities in the IPTO’s Ten-Year Development Plan 2024-2033.

The updated version of the Preliminary Plan of the Ten-Year Development Plan incorporates for the first time specific technical parameters of the new cross-border interconnections with Italy and Albania, which are expected to significantly upgrade our country’s export potential in green energy. At the same time, it foresees new projects amounting to EUR 147 million with a view to strengthening the Transmission System in western and northern Greece, with a total budget of EUR 550 million.

• Greece-Italy electrical interconnection

According to the IPTO’s Ten-Year Development Plan 2024-2033, the nominal transmission capacity of the submarine cable interconnection between Greece and Italy will amount to 1,000 MW, tripling the existing margin of electricity exchanges between the two countries, to 1,500 MW.

On a technical level, the new interconnection will be direct current, with state-of-the-art Voltage Source Converters (VSC) technology and electrode stations in Greece and Italy. The underwater length of the route is estimated at 220 km and the length of the underground sections in Greece and Italy at 55 km. 

• Greece-Albania electrical interconnection

According to the Operator’s updated ten-year plan, the new interconnecting 400 kV Transmission Line between Greece and Albania is expected to be completed by 2030. The interconnection will have a nominal transmission capacity of 1,600 MVA and will connect the Hellenic Electricity Transmission System (HETS) to the new Fier Substation in southern Albania. 

The onshore international interconnection is estimated to have a total length of about 145 km, of which 45 km will be in Greek territory and 100 km in Albanian territory. The project is expected to increase transmission capacity between the two countries by at least 200 MW in both directions (to and from Albania).

• New transmission projects in western and northern Greece

IPTO, in its medium-term investment planning, prioritizes the strengthening of the domestic electricity transmission infrastructure. In this context, the Operator will develop a new HVC in the area of Thesprotia, which will be connected via a new 400 kV Transmission Line to the existing Arachthos HVC. The Thesprotia HVC will be of critical importance as it will serve the two new cross-border connections with Italy and Albania, contribute to strengthening the stability of the Transmission System in the region and increase the transport capacity to support the penetration of new RES plants. 

IPTO also envisages projects for the expansion of the connection points of the Transmission System with the Distribution Network, with the construction of new Substations in Kefalonia (Kefalonia II), Corfu (Sidari), the industrial area of Thessaloniki (Sindos II) and Drama (Prosotsani). In addition, it plans to construct a Substation in Aegina as well as to install 150 kV equipment in Substations and HVC throughout Greece for the connection of new Medium Voltage transformers.

As far as the Ionian Islands are concerned, the Ten-Year Development Plan 2024-2033 includes a new interconnection project between the Kyllini terminal and the Kefalonia II Substation. This interconnection will be implemented with a 150 kV XLPE underwater cable, with a nominal capacity of 200 MVA and a High Voltage Transmission Line on Kefalonia. 

The Chairman and CEO of IPTO, Mr. Manos Manousakis, said in this regard: 

“IPTO is constantly strengthening international interconnections and creating even stronger electrical infrastructures in every corner of the country. Despite the challenges of the energy situation we are going through, the Operator continues to keep a steady pace in the large and demanding projects of the Ten-Year Development Program that will more than double the Greek Transmission System by 2030. The electrical interconnections of Greece with Italy and Albania, as well as the new projects to upgrade the domestic electrical system, will significantly support the penetration of green energy at the national and regional level and will promote the European goals for achieving climate neutrality. In the midst of energy transition, the necessary regulatory support that will ensure the sustainability of the Operator’s investments is of key importance for the smooth continuation of the critical projects we are implementing.”