List of HVDC projects

This is a list of notable high-voltage direct-current power transmission projects.

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 joins two separate AC grids at a single point. 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 (now also obsolete), thyristors, and IGBT power transistors.

Legend
Converter technology:
 * Thury = Series-connected generators as designed by René Thury
 * Merc = Mercury-arc valve rectifier and inverter
 * Thyr = Thyristor rectifier and inverter
 * IGBT = Insulated gate bipolar transistor

Line status: {{legend|#FFFFFF|Existing}} {{legend|#BFBFFF|Under construction}} {{legend|#EFFFBF|Planned}} {{legend|#EFBFBF|Decommissioned}}

Europe
2 As of 9 December 2015, LitPol Link started trial operations.

3 Caithness Moray HVDC serves 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 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



 * 1) Shetland HVDC Connection
 * 2) Caithness Moray HVDC
 * 3) Western Isles HVDC connection
 * 4) NorthConnect
 * 5) North Sea Link: Kvilldal, Norway – Blyth, UK
 * 6) Eastern HVDC Link
 * 7) Moyle: Auchencrosh, UK – Ballycronan More, Northern Ireland, UK
 * 8) Western HVDC Link
 * 9) East–West Interconnector: Leinster, Ireland – Shotton, Wales, UK
 * 10) Celtic Interconnector
 * 11) FAB Link
 * 12) IFA-2
 * 13) HVDC Cross-Channel: Les Mandarins, France – Sellindge, UK
 * 14) Nemo Link
 * 15) BritNed: UK – Netherlands
 * 16) Aachen Liège Electricity Grid Overlay (ALEGrO)
 * 17) Viking Link
 * 18) HVDC DolWin1, HVDC DolWin2, HVDC DolWin3
 * 19) HVDC SylWin1
 * 20) HVDC HelWin1, HVDC HelWin2
 * 21) HVDC BorWin1, HVDC BorWin2, HVDC BorWin3
 * 22) NorNed: Feda, Norway – Eemshaven, Netherlands
 * 23) NORD.LINK: Germany – Norway
 * 24) Skagerrak 1, 2, 3, and 4: Tjele, Denmark – Kristiansand, Norway
 * 25) Konti-Skan 1 and 2: VesterHassing, Denmark – Stenkullen, Sweden
 * 26) StoreBælt: Fyn, Denmark – Zealand, Denmark
 * 27) Baltic Cable: Lübeck- Herrenwyk, Germany – Kruseberg, Sweden
 * 28) Kontek: Bjæverskov, Denmark – Bentwisch, Germany
 * 29) SydVästlänken
 * 30) SwePol: Stärnö, Sweden – Wierzbięcin (Słupsk), Poland
 * 31) LitPol Link
 * 32) NordBalt
 * 33) HVDC Visby–Näs
 * 34) Gotland: Västervik, Sweden – Ygne, Sweden
 * 35) Fenno-Skan: Rauma, Finland – Dannebo, Sweden, Fenno-Skan 2
 * 36) ÅL-link
 * 37) Estlink: Harku, Estonia – Espoo, Finland
 * 38) Estlink 2
 * 39) Cometa: Valencia, Spain – Mallorca, Spain
 * 40) INELFE Baixas - Santa Llogaia
 * 41) HVDC Italy–Corsica–Sardinia: "SACOI" – Codrongianos, Sardinia, Italy – Lucciana, Corsica, France – Suvereto, Italy (mainland)
 * 42) SAPEI, Sardinia – Italian mainland
 * 43) HVDC MON.ITA Project
 * 44) HVDC Italy-Greece: Arachthos, Greece – Galatina, Italy
 * 45) EuroAsia Interconnector
 * 46) EuroAfrica Interconnector
 * 47) Greenlink
 * 48) France-Italy via Fréjus Road Tunnel
 * 49) ElecLink: via Channel Tunnel
 * 50) INELFE Biscay Gulf
 * 51) NeuConnect: Isle of Grain, UK – Wilhelmshaven, Germany