Gotland 3
Island LinkOperationalSE130 MW150 kV98 km1987
Also known as:Gotland III, Gotland 3, Gotland HVDC 3, Gotland III HVDC, Gotland–Sweden HVDC link 3, Gotland 3 (1985)
Status:Operational
Capacity:130 MW
Project Company:Vattenfall Eldistribution AB
Type:island link
Gotland 3 (HVDC Gotland 3) is a domestic HVDC island link that connects the Swedish mainland near Västervik with the island of Gotland at Ygne. Commissioned in the 1980s, Gotland 3 is a monopolar, line‑commutated converter (LCC/thyristor) pole rated at approximately 130 MW and 150 kV; it normally operates in...
Supply Chain (2)
Project Timeline (5)
2018Major Maintenance
In 2018, Hitachi Energy carried out a major modernization of the HVDC Gotland infrastructure, including the Gotland 3 monopolar link between Västervik on the Swedish mainland and Ygne on Gotland, by installing advanced control systems to better integrate renewable generation and enhance grid stability.
2017Operations Other
In 2017, the HVDC Gotland system, which includes the Gotland 3 monopolar link between Västervik on the Swedish mainland and Ygne on Gotland, received IEEE Milestone recognition for demonstrating the viability of high‑voltage direct current technology for long‑distance submarine transmission and its historical significance in electrical engineering.
1987Commercial Operations Full Power
In 1987, Vattenfall and ASEA completed and commissioned the Gotland 3 monopolar HVDC link between Västervik on the Swedish mainland and Ygne on Gotland, a 150 kV, 130 MW submarine cable system that entered full commercial operation and, together with Gotland 2, formed a bipolar connection providing up to 260 MW of transmission capacity to the island.
1986Cable Installation Complete
The HVDC Gotland 1 submarine cables between mainland Sweden and Gotland were replaced in 1986 as part of the Gotland 3 expansion, completing installation of the new higher-capacity HVDC cable system associated with the Gotland 3 monopolar link. The replacement was driven by load growth rather than cable aging, with tests on the removed 1954-vintage cable showing it remained in near original condition after 32 years of service, including 16 years at an uprated 150 kV.
Date TBDConverter Supplier Selected
ABB was identified as the supplier for the Gotland 3 HVDC link between Västervik on the Swedish mainland and Yigne on Gotland, a 130 MW, 150 kV cable project developed in the mid‑1980s as an additional link to satisfy increasing demand and improve supply security for the island, typically operated together with Gotland 2 as a bipolar transmission system.