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This is a list of notable high-voltage direct-current power transmission projects.
Contents
HVDC projects for long-distance transmission have two (or rarely, more) converter stations and a transmission line interconnecting them. Generally overhead lines are used for interconnection, but an important class of HVDC projects use submarine power cables. A back-to-back station has no transmission line and connects two AC grids at different frequencies or phase counts. Historical HVDC systems used the Thury system of motor-generators but these have all been made obsolete by later developments such as mercury-arc valves, thyristors, and IGBT power transistors.
Legend
Line type:
Line status:
Europe
1 Moyle currently running at 250 MW but being restored to 450 MW in 2016. National Grid says it will be 450 MW to Northern Ireland and 295 MW to Wales.
2 As of 9 December 2015, LitPol Link started trial operations.
3 Caithness Moray HVDC will serve a number of renewable energy sources in the north of Scotland - see map
4 Contracts due to be placed in 2016.
5 Elia says construction expected to start in late 2017. 6 2021 date is that quoted to support the Shetland Wind Farm that SSE is a part investor in.
7 Decision on project expected in 2017 following consultation - see SSE PD reference.
Europe
- Iceland – UK (option), 1.1 GW
- Moyle: Auchencrosh, UK – Ballycronan More, Northern Ireland, UK
- NSN Norway Kvilldal – UK Blyth, 1.4 GW under construction
- Viking cable (option): Germany – Norway, 600 MW but NORD.LINK 1.4 GW under construction
- Kattegat (option): Norway – Zealand, Denmark; or Norway – southern Sweden
- Fenno-Skan: Rauma, Finland – Dannebo, Sweden
- Vyborg
- Estlink: Harku, Estonia – Espoo, Finland
- NorNed: Feda, Norway – Eemshaven, Netherlands
- Skagerrak 1, 2, 3, and 4: Tjele, Denmark – Kristiansand, Norway
- Konti-Skan 1 and 2: VesterHassing, Denmark – Stenkullen, Sweden
- Gotland: Västervik, Sweden – Ygne, Sweden
- NordE.ON 1: Diele, Germany – Borkum 2 platform, Germany
- StoreBælt: Fyn, Denmark – Zealand, Denmark
- (purposely left blank)
- SwePol: Stärnö, Sweden – Wierzbięcin (Słupsk), Poland
- Baltic Cable: Lübeck- Herrenwyk, Germany – Kruseberg, Sweden
- Kontek: Bjæverskov, Denmark – Bentwisch, Germany
- East West Interconnector: Leinster, Ireland – Anglesey, Wales, UK. Operational since 2012
- BritNed: UK – Netherlands. Operational since April 2011.
- HVDC Cross-Channel: Les Mandarins, France – Sellindge, UK
- HVDC Italy–Corsica–Sardinia: "SACOI" – Codrongianos, Sardinia, Italy – Lucciana, Corsica, France – Suvereto, Italy (mainland)
- Sapei, Sardinia – Italian mainland
- Cometa: Valencia, Spain – Mallorca, Spain
- Algeria – Spain
- Algeria – Sardinia
- Tunis – Sicily
- Tripoli – Sicily
- HVDC Italy-Greece: Arachthos, Greece – Galatina, Italy