The Interconnection of Cyclades islands – Phase D project includes 150kV submarine cables of about 353.2 km total length and 150 kV underground cables of 19.6 km total length connecting the 150 kV GIS Lavrio Substation (S/S) to the new 150 kV GIS Naxos S/S via Serifos, Milos, Folegandros and Thira islands, as well as the new 150 kV GIS Substations Serifos, Milos, Folegandros and Thira. It consists of the following subprojects:
- Underground Transmission Line (T.L.) 150 kV at Lavrio about 1.047 km long
- Submarine T.L. 150 kV Lavrio – Serifos about 109.3 km long
- Underground T.L. 150 kV at Serifo about 1.382 km long
- Construction of new GIS S/S at Serifos Island
- Submarine T.L. 150 kV Serifos – Milos about 46.7 km long
- Underground T.L. 150 kV at N. Milos about 7.5 km long
- Construction of new GIS S/S at Milos Island
- Underground T.L. 150 kV at Milos (to Folegandros) about 6.65 km long
- Submarine T.L. 150 kV Milos - Folegandros about 55.2 km long
- Underground T.L. 150 kV at Folegandros about 1.872 km long
- Construction of new GIS S/S at Folegandros Island
- Submarine T.L. 150 kV Folegandros - Thira about 59.9 km long
- Underground T.L. 150 kV at Thira about 0.607 km long
- Construction of new GIS S/S at Thira Island
- Submarine T.L. 150 kV Thira – Naxos about 82.1 km long
- Underground T.L. 150 kV at Naxos about 0.528 km long
- Installation of Static VAR Compensator (SVC) with a capacity of -100 / + 50 MVAR at Thira S/S.
The project aims to:
• ensure the safety and reliability of electrical power supply to Cyclades Islands through the interconnection with the mainland Electricity Transmission System (HETS).
• allow the gradual withdrawal of the oil- fueled autonomous power stations that currently supply the Cyclades islands, which have to be phased out or be replaced due to environmental constraints, in combination with the ageing of most of them. This will contribute to the further reduction of Public Service Obligations (PSO) for all consumers, through a significant reduction in the current high cost of electricity generation, and to the reduction of greenhouse gas emissions.
• allow full utilization of the abundant regional RES potential, which is currently subjected to restrictions imposed by the autonomous operation of the islands. The utilization of RES potential is a major issue at regional and national level due to the sustainability of RES, but also in the context of strategies to reduce greenhouse gas emissions.
• create job opportunities in regional and national level.
This project complements other co-funded projects and contributes to the increase of RES penetration, meeting specific energy and climate targets defined by the National Energy and Climate Plan (NECP).
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