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Cabo inter-ilhas Grupo Central (Açores), Rede elétrica inter-ilhas Faial–Pico–São Jorge, Faial–Pico interconnector, Interligação interilhas Grupo Central Açores, Azores central islands interconnector
On 16 April 2020, the Clean Energy for EU Islands Secretariat, through consultants 3E, issued a technical note providing a high-level assessment of installing an undersea electric grid cable between the Azores islands of Pico and Faial and recommending further studies to develop this inter-island connection project, as part of technical advisory services initiated under a 2019 call for proposals.
Further studies carried out in 2010 again assessed an undersea power cable interconnection between the Azores islands and found the scheme to be uneconomic, citing the same concerns about likely cable failure arising from very deep waters, rough basalt seabed conditions and strong ocean currents.
In 2002, new technical and economic studies on an undersea power cable interconnection between the Azores islands concluded that the solution was uneconomical, primarily due to the high probability of cable failure caused by extreme water depths, a rough basalt seabed and strong ocean currents along the prospective routes.
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Between 1977 and 1981, an experimental undersea power cable interconnection between the Azores islands of Faial and Pico was installed and tested as a grid extension project, but recurrent breakdowns and high repair costs led to the link being abandoned. This early trial highlighted technical and reliability challenges of subsea power transmission in the archipelago’s deep, rough seabed conditions and delayed further development of the inter-island cable concept for several decades.
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