The Crete–Peloponnese interconnection constitutes the first phase of Crete’s interconnection with the Hellenic Electricity Transmission System (HETS).
The project involves the construction of a 150 kV AC interconnection with a transmission capacity of 2x200 MVA between Crete and the Peloponnese.
It includes two submarine cables, each 135 km long, upgrades to existing and construction of new overhead transmission lines, underground cable sections and substations in both the Peloponnese and Crete, as well as a STATCOM system in Heraklion for controlled reactive power compensation. The submarine cables make landfall at Kissamos Bay in Crete and Cape Malea in the Peloponnese.
Upon completion, the project marked several major technical milestones and international records, including:
- The world’s longest AC cable interconnection (174 km)
- The world’s longest high-voltage submarine interconnection using XLPE-insulated three-core cable technology (132 km)
- The world’s deepest high-voltage submarine cable interconnection using XLPE-insulated three-core cable technology (1,000 metres depth)
- The largest single project in IPTO’s history in terms of budget at the time
- The Crete–Attica interconnection, known as the “Great Crete Interconnection”, will complement the project and ensure the island’s long-term energy adequacy and system stability.
- Reliable and stable operation of Crete’s electricity system, with significant benefits for tourism and economic activity
- Reduced environmental impact through the gradual phase-out of thermal power generation on the island
- Lower electricity generation costs
- Reduction of Public Service Obligation (PSO) charges for all consumers
- Greater utilisation of Crete’s wind, solar and renewable energy potential
- Reduced need for reserve generation units
- Lower greenhouse gas emissions
- Reduced dependence on oil imports
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