In 1992, the SACOI interconnection was upgraded with new 300 MW, 200 kV HVDC converter stations at Codrongianos (Sardinia) and Suvereto (Tuscany), equipped with air‑cooled, air‑insulated thyristor valves, replacing the original mercury‑arc converter stations at San Dalmazio and Codrongianos. This upgraded multi‑terminal link, designated SACOI 2 and operating together with the existing Lucciana terminal in Corsica, was commissioned in 1992 and entered full commercial operation at its uprated 300 MW capacity.
In 1992, the SACOI 2 multiterminal HVDC interconnection linking Suvereto (Italy), Lucciana (France/Corsica) and Codrongianos (Italy) at 200 kV and 300 MW is recorded, indicating that its onshore converter stations were commissioned and the upgraded SACOI 2 scheme entered service as a multiterminal system.
| Tuscany | Corsica | Sardinia | |
|---|---|---|---|
| Landfall | Salivoli cable landing point (Piombino, Tuscany) | Bastia cable terminal (Bastia, Corsica) | Santa Teresa Gallura landfall (La Marmorata, Sardinia) |
| Grid Connection | Suvereto substation (380 kV) | Lucciana HVDC converter station (Lucciana) | Lucciana 90 kV substation |
Tuscany
Corsica
Sardinia