The Crete-Attica cable marks a significant step in Greece’s energy infrastructure. It connects the island of Crete to the mainland electricity grid.
The project, valued at 1.1 billion euros, took about four and a half years from contract signing to completion.
After months of tough equipment and cable testing, the cable is finally set to run continuously. This move should boost the region’s energy supply and efficiency.
This connection ends Crete’s energy isolation, promising more stable and reliable power. The tech behind it helps electricity flow more smoothly and aims to lower costs for folks using it.
The cable’s launch kicks off a new era in regional energy management. If you want more details about its commercial operation, you can check out reports on its activation at Heraklion as the fibre optic link goes live.
Key Takeaways
- Crete’s energy isolation is finally over thanks to the new cable link.
- The project took over four years and cost 1.1 billion euros.
- The connection brings better energy stability and lower costs.
Ending Crete’s Energy Isolation
The electricity link between Crete and Attica, managed by Ariadne Interconnection (a subsidiary of ADMIE), just completed a critical step in breaking Crete’s energy isolation. This connection uses a high-voltage direct current (HVDC) system.
Now, Crete’s fully part of the National Electricity System. That means better supply reliability and more flexibility.
Before this, Crete only had a smaller alternating current (AC) link to the Peloponnese, which launched in 2021. With the new HVDC connection to Attica and the older AC link, Crete isn’t an energy island anymore.
Benefits of the Crete Power Link
- Energy Security: Crete now taps into mainland power when needed, cutting risks from local generation shortages.
- Environmental Impact: The improved network helps Crete use more renewable energy.
- Economic Growth: Better energy supply supports local businesses and draws in investments.
- Grid Stability: The HVDC connection smooths out power flow and helps manage ups and downs.
Key Features of the HVDC Connection
Feature |
Description |
|---|---|
Technology |
High-voltage direct current (HVDC) |
Operator |
Ariadne Interconnection (ADMIE’s subsidiary) |
Integration |
Full participation in the National Electricity System |
Previous Connection |
AC link with Peloponnese (since 2021) |
Estimated Cost |
Approximately €1.1 billion |
With these two links, Crete shifts from being energy-isolated to acting as a real energy hub in the national power network. It’s a big deal for the environment and economy, and honestly, it should make life better for people living there.
Technical Details of the Crete – Attica Cable Project
The Crete – Attica electricity interconnection is a high-capacity project with a power rating of 1 GW and a budget of about €1.1 billion. It uses advanced Voltage Source Converter (VSC) technology at the converter stations and runs on submarine cables operating at 500 kV.
The cable system stretches 400 kilometres and dives down to 1,200 metres, making it one of the world’s deepest energy interconnections. That’s pretty wild, honestly.
Several big players—Siemens, TERNA, Nexans, Prysmian, NKT, and Hellenic Cables—handled the major sub-projects. Their expertise covered everything from design to manufacturing and installation.
Building the whole system took just 4.5 years, which is fast compared to similar projects in Europe that usually drag on for over seven years. They managed this despite the pandemic and all sorts of supply chain headaches.
The cable now plays a big role in Greece’s electricity network, moving power between Crete and the mainland at a scale that’s never been seen before here. This boost in reliability and stability also helps Crete use more renewable energy.
Key Technical Features
Feature |
Specification |
|---|---|
Capacity |
1 GW |
Voltage |
500 kV |
Total Cable Length |
400 km |
Maximum Water Depth |
1,200 metres |
Technology Used |
High-tech VSC converters |
Project Duration |
4.5 years |
Budget |
€1.1 billion |
Equipment and Contractors
- Converter Stations: Use advanced VSC technology to control power flow and keep things running smoothly.
- Submarine Cables: Custom-built for deep-sea installation, tough enough for extreme underwater conditions.
- Main Contractors: Siemens, TERNA, Nexans, Prysmian, NKT, and Hellenic Cables all played key roles in getting it done.
- Project Management: Managed under national programmes like ESPA 2014-2020 and ESPA 2021-2027, moving Greece’s energy infrastructure forward.
Testing and Commissioning
Before switching on for good, the project went through serious acceptance tests (SAT) to make sure everything worked safely and reliably. Ariadne Interconnection and ADMIE teamed up for these checks.
Once they cleared all the tests, it was ready for commercial operation. No drama—just a lot of careful work.
Contribution to the Electricity Transmission System
This is one of Greece’s largest energy transportation projects. By integrating high voltage direct current (HVDC) technology, the system can move power more efficiently and with better control, especially over long distances and underwater.
Now, Crete connects reliably to the mainland grid, which helps Greece improve energy security and cut electricity costs. It also paves the way for more renewables and future energy market changes.
Benefits Brought by the Crete – Attica Cable
The Crete – Attica cable brings real advantages—economic, environmental, and social—that you can’t just shrug off.
Economic Benefits
This connection, along with Crete’s first link to the Peloponnese, helps save up to 550 million euros for electricity consumers nationwide. The dual grid links cut down on Public Service Obligations (PSO) charges, which means cheaper bills for households and businesses.
On top of that, the cable encourages more investment in renewable energy projects on Crete. That’s a win for the local economy and the environment.
Environmental Benefits
Tying Crete to the mainland means the island doesn’t have to rely so much on dirty, fossil-fuel power plants. CO2 emissions drop by around 60%, which is a big deal for fighting climate change and meeting Greece’s environmental goals.
Social Benefits
The cable gives Crete’s residents a more reliable electricity supply all year. Households, businesses, and especially the tourism sector benefit from fewer power disruptions. Tourists probably won’t even notice—no one likes a blackout on vacation.
For locals, it’s just a steadier, safer energy supply. That really does make life better.
Technical Aspects and Energy Flow
The cable uses two high-voltage direct current (HVDC) lines, running underground and undersea, to connect the Attica Converter Station near Aspropyrgos with the Damasta Converter Station near Heraklion. It can move power both ways, depending on where it’s needed most.
This flexibility helps keep the whole network balanced and efficient.
Summary Table of Key Benefits
Category |
Description |
Impact |
|---|---|---|
Economic |
Reduced PSO costs, lower electricity bills |
Up to €550 million saved nationally |
Environmental |
CO2 emission cut from decreased fossil fuel use |
Approx. 60% reduction in Crete’s CO2 |
Social |
Improved energy security and stable electricity supply |
Better living conditions and tourism boost |
Technical |
HVDC lines enable two-way energy flow |
Network flexibility and reliability |
The Crete – Attica cable is a crucial step in modernising Greece’s energy infrastructure. It supports the country’s goals to cut pollution, secure energy, and save money for consumers.
Countdown to the Operation of the Attica-Crete Power Link
The Attica-Crete electrical interconnection is almost ready for full commercial operation. It’s entering its last stage of continuous functioning, and honestly, it feels like a big leap for Greece’s electricity network.
This new link should make power supply between Crete and the mainland a lot more stable and efficient. People have been waiting for something like this for ages.
Engineers ran a ton of tests on the system. Over the past few months, they checked different transfer scenarios and confirmed electricity can flow smoothly both ways—Crete to the mainland and back.
They also pushed each transmission pole to its limit. These trials showed the link can handle two-way energy flow even when things get tricky, so there’s some real reliability here.
The power line’s got a capacity of 1 GW, with a total budget that hit €1.1 billion. It uses Voltage Source Converter (VSC) tech at its converter stations, which is pretty advanced stuff.
Submarine high-voltage direct current (HVDC) cables run at 500 kV and dive as deep as 1,200 metres under the sea. That’s wild—these depths put the project among the deepest marine power cable jobs anywhere.
It only took 4.5 years to finish the project. That’s speedy, considering similar work in Europe usually drags on for more than seven years.
After the Attica-Crete connection, more power links are on the way. The Cyclades islands’ interconnection should kick off by mid-2026.
This next phase will reach islands like Santorini, Folegandros, Milos, and Serifos. The first part, Santorini to Naxos, is almost done and should be ready by the end of 2025.
Once it’s up and running, the Cyclades network will support up to 332 MW of renewable energy installations. That’s a decent step toward cleaner island power, isn’t it?
Looking beyond the Cyclades, power links to the Dodecanese and Northeastern Aegean islands are in the pipeline for 2029. These projects should make the grid even more stable and help bring more renewable energy to Greek islands.
Key Features of the Attica-Crete Interconnection
Feature |
Details |
|---|---|
Power Capacity |
1 GW |
Budget |
€1.1 billion |
Technology |
VSC converters |
Cable Voltage |
500 kV DC |
Maximum Cable Depth |
1,200 metres |
Construction Time |
4.5 years |
Operation Start |
Mid-2025 (continuous operation phase) |
The link’s design supports big power flows and aims for high reliability. That’s pretty vital for Crete, especially as the island’s energy needs keep growing.
With this setup, Crete can now double how much electricity it gets from the mainland. That means less reliance on local power plants.
This project helps cut fossil fuel use and nudges the region toward renewables. It’s a meaningful shift, even if there’s still a way to go.
If you want more details on how things are going or what’s next, there’s info about the operation of the Attica-Crete interconnection available.
