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| Trans-Mediterranean Interconnection | |
|---|---|
| Name | Trans-Mediterranean Interconnection |
| Type | Electricity transmission project |
| Status | Operational / Planned |
| Start | Spain |
| End | Italy |
| Operator | Consortium (international utilities) |
| Length | ~kilometers |
| Capacity | ~GW |
| Established | 21st century |
Trans-Mediterranean Interconnection The Trans-Mediterranean Interconnection is a cross-border high-voltage electricity link conceived to connect the national grids of Spain, France, Italy, Morocco, Algeria, Tunisia, Libya, Greece, Turkey, Malta, Cyprus, Egypt, Israel, Lebanon, Syria, Portugal, Andorra, Monaco, Vatican City, Switzerland, Austria, Germany, Belgium, Netherlands, Luxembourg, United Kingdom, Ireland, Iceland, Norway, Sweden, Finland, Denmark, Poland, Czech Republic, Slovakia, Hungary, Romania, Bulgaria, Serbia, Croatia, Slovenia, Bosnia and Herzegovina, Montenegro, North Macedonia, Albania, Kosovo, Malta (duplicate regional node), Sardinia, Sicily, Corsica, Balearic Islands, Canary Islands, Madeira, Azores, Crete, Lesbos, Rhodes, Cyprus (duplicate), Suez Canal, Gibraltar, Strait of Sicily, Strait of Gibraltar, Ionian Sea, Tyrrhenian Sea, Adriatic Sea, Aegean Sea, Mediterranean Sea. The initiative aims to facilitate large-scale transfers of renewable generation, enhance interconnection between European Union members and North African states, and integrate markets represented by entities such as ENTSO-E, ENTSO-E Member Transmission System Operators, European Commission, African Union, Union for the Mediterranean, and regional utilities including Iberdrola, Enel, RTE, Terna, Red Eléctrica de España, National Grid, EDF, Edison, CEPS, PSE, Energinet, TenneT, Statnett, EirGrid, SONATRACH, Office National de l'Électricité et de l'Eau Potable (ONEE), Masdar, ACWA Power, Orascom Construction, Eni, TotalEnergies, BP, Siemens Energy, ABB Ltd, GE Vernova, Schneider Electric, Alstom, Mitsubishi Electric, Hitachi Energy.
Conceived during multilateral dialogues involving European Commission, African Union, Union for the Mediterranean, Mediterranean Solar Plan, Desertec Foundation, Southern Gas Corridor, Barcelona Process, the project builds on precedent links such as HVDC Italy–Greece interconnection, BritNed, East–West Interconnector, NordLink, North Sea Link, Miguel de Cervantes Cable and policy frameworks like the Green Deal, Energy Community, Third Energy Package (EU), Regulation 2019/943, Paris Agreement, Kyoto Protocol, and bilateral accords between Spain–Morocco relations, Italy–Tunisia relations, Italy–Libya relations. Stakeholders include national ministries such as France Ministry for the Ecological Transition, Ministry of Ecological Transition and Demographic Challenge (Spain), Ministry of Ecological Transition (Italy), investment banks like European Investment Bank, European Bank for Reconstruction and Development, African Development Bank, and intergovernmental entities including United Nations Economic Commission for Europe, United Nations Development Programme, and World Bank.
The Interconnection employs high-voltage direct current (HVDC) technology and high-voltage alternating current (HVAC) components drawing on designs by Siemens Energy, ABB Ltd, GE Vernova, Hitachi Energy, Mitsubishi Electric and uses converter stations similar to those at Inga–Shaba line and Kashiwazaki–Kariwa. Routes traverse continental corridors and submarine segments across the Strait of Gibraltar, the Alboran Sea, the Tyrrhenian Sea, the Ionian Sea, the Adriatic Sea, and the Aegean Sea. Key nodes include interconnectors to island systems such as Sicily, Sardinia, Corsica, Balearic Islands, Cyprus, Malta, and linkages to power hubs like Algeria's export infrastructure, Egypt's grid near the Suez Canal, and Mediterranean port cities: Barcelona, Marseille, Genoa, Naples, Valencia, Malta (city), Tunis, Algiers, Tripoli, Alexandria, Haifa, Beirut, Antalya, Istanbul. Typical specifications include ±525 kV HVDC sections, multi-terminal configurations, capacities in the multi-gigawatt range, long submarine cables using cross-linked polyethylene (XLPE) insulation and fiber-optic telecommunication pairs, and converter technologies such as Voltage Source Converters (VSC) and Line Commutated Converters (LCC).
Construction phases have been contracted to global engineering and construction firms including Siemens AG, ABB Ltd, GE Vernova, Mitsubishi Heavy Industries, Saipem, TechnipFMC, Orascom Construction, ACCiona, Webuild, and civil consortia formed by national grid operators such as Terna, Red Eléctrica de España, RTE, National Grid, ADMIE (IPTO), Hellenic Electricity Transmission System Operator, ELES (Slovenia), TransnetBW, TenneT, ELIA, PSE. Financial participation involves European Investment Bank, European Bank for Reconstruction and Development, African Development Bank, private equity investors, sovereign wealth funds including Qatar Investment Authority, Abu Dhabi Investment Authority, Mubadala Investment Company, and energy companies like Iberdrola, Enel, EDF, Edison, ENI.
Environmental impact assessments reference conventions and directives such as the Habitat Directive, Birds Directive, Bern Convention, Barcelona Convention, OSPAR Convention, Marine Strategy Framework Directive, and the Espoo Convention. Regulatory compliance interfaces with European Commission state aid rules, TEN-E Regulation, national permitting authorities including Spain Ministry of Environment, Ministry for Environment (Italy), and maritime regulators like International Maritime Organization. Environmental monitoring addresses impacts on protected areas including Natura 2000 sites, marine mammals in the Alboran Sea and Tyrrhenian Sea, and archaeological resources associated with Phoenician and Roman era wrecks.
Market integration targets convergence among day-ahead and intraday markets administered by entities such as OMIE, GME, EPEX SPOT, Nord Pool, HUPX, Balkan Power Exchanges, and exchanges linked to ENTSO-E platforms. The project affects merchant revenues, congestion rents, ancillary services markets, and renewable curtailment reduction, influencing utilities like Iberdrola, Enel, EDF, Endesa, CEZ Group, RWE, E.ON, Ineos, and trading houses such as Vitol, Glencore, Trafigura, Mercuria. Macro-economic actors include European Investment Bank, European Commission cohesion funds, World Bank, and national ministries of finance. Energy security implications engage NATO energy resilience discourse, G7 energy policy dialogues, and bilateral energy agreements such as those involving Italy–Algeria relations and Egypt–Greece.
Operational governance relies on transmission system operators (TSOs) like Terna, RTE, Red Eléctrica de España, TenneT, ELIA, CEPS, and control centers employing protocols from ENTSO-E, CEN-CENELEC, IEC, IEEE, and cybersecurity frameworks advocated by ENISA, NATO Communications and Information Agency, European Network of Transmission System Operators for Electricity. Maintenance contracts involve asset managers such as Siemens Energy, ABB Ltd, Schneider Electric, and maritime installers experienced with projects like East–West Interconnector. Security planning includes physical protection in ports like Genoa, Barcelona, Marseille, Valencia, and contingency coordination with coast guards including Guardia Civil, Italian Coast Guard, Hellenic Coast Guard.
Planned expansions envisage multi-terminal HVDC hubs, integration with offshore wind clusters in the Mediterranean Sea and the Atlantic Ocean near Portugal, hydrogen-ready power-to-X facilities tied to projects by Europe's hydrogen strategy, Hydrogen Europe, ADEME, Maire Tecnimont, Iberdrola’s green hydrogen pilots, and links to wider corridors such as North Seas Grid and Southern Gas Corridor repurposing options. Research collaborations with institutions like Imperial College London, Politecnico di Milano, CNRS, CNR, CENER (Spain), CEA (France), and companies such as Siemens Energy aim to advance converter technology, cable insulation, and multi-terminal protection schemes to increase resilience and capacity.
Category:Electric power transmission systems