List of high-voltage underground and submarine cables

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This is a list of high voltage (above 150 kV) AC electrical transmission lines. This list is incomplete.

For high-voltage direct current, both underground and submarine, see List of HVDC projects.

This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources.

Austria

Facility Length (km) Year of inauguration Voltage Coordinates of endpoints
Vienna/Substation-South - Vienna/Kendlergasse ? 1984 380 kV 48°09′54″N 16°19′52″E / 48.1651°N 16.3312°E / 48.1651; 16.3312 (Vienna South Substation) ; 48°12′19″N 16°18′40″E / 48.2052°N 16.3111°E / 48.2052; 16.3111 (Vienna/Kendlergasse substation)
Vienna/Kendlergasse - Simmering ? ? 380 kV 48°12′19″N 16°18′40″E / 48.2052°N 16.3111°E / 48.2052; 16.3111 (Vienna/Kendlergasse substation) ; 48°10′53″N 16°26′02″E / 48.1813°N 16.4338°E / 48.1813; 16.4338 (Simmering substation)
Vienna/Substation-North - Vienna/Dr.-Nekowitschstrasse 5,5 2006 380 kV 48°15′27″N 16°23′24″E / 48.2576°N 16.3900°E / 48.2576; 16.3900 (Vienna North Substation) ; 48°17′48″N 16°23′45″E / 48.2968°N 16.3958°E / 48.2968; 16.3958 (Vienna/Dr.-Nekowitschstrasse Cable Terminal)
Vienna/Substation-South - Vienna-South Cable Terminal ? ? 380 kV 48°09′54″N 16°19′52″E / 48.1651°N 16.3312°E / 48.1651; 16.3312 (Vienna South Substation) ; 48°08′10″N 16°20′26″E / 48.1362°N 16.3406°E / 48.1362; 16.3406 (Vienna-South Cable Terminal)

Czech Republic

Facility Length (km) Year of inauguration Voltage Coordinates of endpoints
Hradec substation, powerline to Etzenricht ? 1993 380 kV 50°20′48″N 13°19′26″E / 50.3466°N 13.3239°E / 50.3466; 13.3239 (Hradec substation, powerline to Etzenricht, busbar terminal) ; 50°20′42″N 13°19′54″E / 50.3451°N 13.3317°E / 50.3451; 13.3317 (Hradec substation, powerline to Etzenricht, overhead line terminal)

Denmark

Facility Length (km) Year of inauguration Voltage Coordinates of endpoints
Jutland 14 2003 380 kV
Copenhagen 22 1996 380 kV
Copenhagen 12 1999 380 kV

Denmark/ Sweden

Facility Length (km) Year of inauguration Voltage Coordinates of endpoints
Helsingborg-Helsingor Cable ? ? 380 kV 56°04′58″N 12°30′01″E / 56.0829°N 12.5002°E / 56.0829; 12.5002 (Helsingor Cable Terminal) ; 56°07′57″N 12°35′44″E / 56.1324°N 12.5955°E / 56.1324; 12.5955 (Helsingborg Cable Terminal)

Egypt/Jordan

Facility Length (km) Year of inauguration Voltage Coordinates of endpoints
Red Sea Cable 13.6 1998 400 kV 29°29′11″N 34°52′31″E / 29.4863°N 34.8754°E / 29.4863; 34.8754 (Taba Cable Terminal) ; 29°25′57″N 34°58′38″E / 29.4324°N 34.9771°E / 29.4324; 34.9771 (Aqaba Cable Terminal)

Germany

Facility Length (km) Year of inauguration Voltage Coordinates of endpoints
Berlin/Mitte - Berlin/Stadtautobahn 11,5 1977 380 kV 52°30′12″N 13°22′09″E / 52.5033°N 13.3691°E / 52.5033; 13.3691 (Berlin-Mitte Substation); 52°31′35″N 13°16′51″E / 52.5265°N 13.2809°E / 52.5265; 13.2809 (Terminal Berlin Stadtautobahn)
Berlin/Reutter - Berlin/Teufelsbruch ? 1993 380 kV 52°34′50″N 13°12′42″E / 52.5806°N 13.2116°E / 52.5806; 13.2116 (Teufelsbruch Substation) ; 52°31′54″N 13°14′56″E / 52.5316°N 13.2488°E / 52.5316; 13.2488 (Reutter Substation)
Berlin/Mitte - Berlin/Friedrichshain 6,3 1998 380 kV 52°30′12″N 13°22′09″E / 52.5033°N 13.3691°E / 52.5033; 13.3691 (Berlin-Mitte Substation) ; 52°31′20″N 13°27′26″E / 52.5223°N 13.4571°E / 52.5223; 13.4571 (Berlin-Friedrichshain Substation)
Berlin/Friedrichshain - Berlin/Marzahn 5,2 2000 380 kV 52°31′20″N 13°27′26″E / 52.5223°N 13.4571°E / 52.5223; 13.4571 (Berlin-Friedrichshain Substation); 52°32′07″N 13°31′26″E / 52.5354°N 13.5240°E / 52.5354; 13.5240 (Berlin-Marzahn Substation)
Kraftwerk Altbach 0,3 ? 380 kV 48°43′08″N 9°22′15″E / 48.7190°N 9.3708°E / 48.7190; 9.3708 (Altbach Terminal West); 48°43′07″N 9°22′28″E / 48.7187°N 9.3745°E / 48.7187; 9.3745 (Altbach Terminal East)
Lübeck/Bargerbück - Lübeck/Siems ? 2004 220 kV 53°54′35″N 10°45′30″E / 53.9098°N 10.7584°E / 53.9098; 10.7584 (Lübeck-Siems Substation); 53°55′09″N 10°38′27″E / 53.9192°N 10.6408°E / 53.9192; 10.6408 (Lübeck-Bargerbück Substation)
SITAC Park Undercrossing ? ? 220 kV 52°25′52″N 13°30′23″E / 52.4312°N 13.5064°E / 52.4312; 13.5064 (SITAC Park Undercrossing, Terminal West); 52°25′30″N 13°31′24″E / 52.4249°N 13.5232°E / 52.4249; 13.5232 (SITAC Park Undercrossing, Terminal East)
Neckarwestheim/Nuclear Power Plant, Unit 2 - Neckarwestheim/Traction Current Inverter Station ? 2011 380 kV 49°02′23″N 9°10′36″E / 49.0396°N 9.1768°E / 49.0396; 9.1768 (Neckarwestheim/Nuclear Power Plant, Unit 2); 49°02′17″N 9°10′47″E / 49.0380°N 9.1797°E / 49.0380; 9.1797 (Neckarwestheim/Traction Current Inverter Station)
Paulaner Brewery Cable Tunnel ? 380 kV 48°10′42″N 11°25′51″E / 48.1782°N 11.4309°E / 48.1782; 11.4309 (Paulaner Brewery Cable Tunnel, Terminal West); 48°10′34″N 11°26′03″E / 48.1762°N 11.4341°E / 48.1762; 11.4341 (Paulaner Brewery Cable Tunnel, Terminal East)

Morocco/ Spain

Facility Length (km) Year of inauguration Voltage Coordinates of endpoints
Gibraltar Strait Power Cable ? 1998 380 kV 35°49′51″N 5°36′49″W / 35.8309°N 5.6137°W / 35.8309; -5.6137 (Morocco Cable Terminal) ; 36°01′56″N 5°36′22″W / 36.0323°N 5.6061°W / 36.0323; -5.6061 (Tarifa Cable Terminal)

Italy

Facility Length (km) Year of inauguration Voltage Coordinates of endpoints
Messina Strait Cable ? 1985 380 kV 38°12′12″N 15°38′16″E / 38.2032°N 15.6379°E / 38.2032; 15.6379 (Villa San Giovanni Cable Terminal) ; 38°13′43″N 15°33′40″E / 38.2286°N 15.5611°E / 38.2286; 15.5611 (Messina Cable Terminal)
Milan Section of Turbigo-Rho line 8.5 2006 380 kV 45°31′46″N 8°58′17″E / 45.5294°N 8.9714°E / 45.5294; 8.9714 (Pogliano Cable Terminal) ; 45°32′38″N 9°03′24″E / 45.5439°N 9.0568°E / 45.5439; 9.0568 (Rho Cable Terminal)


Italy / Malta

Facility Length (km) Year of inauguration Voltage Coordinates of endpoints
Malta–Sicily interconnector 120 2015 220 kV 36°52′51″N 14°40′51″E / 36.8809°N 14.6809°E / 36.8809; 14.6809 (Ragusa Substation) ; 35°56′19″N 14°26′17″E / 35.9386°N 14.4380°E / 35.9386; 14.4380 (Magħtab Substation)

Luxembourg

Facility Length (km) Year of inauguration Voltage Coordinates of endpoints
Bettembourg West Bypass ( Part of 220 kV-line Schifflange-Berchem) ? ? 220 kV 49°30′58″N 6°05′24″E / 49.5160°N 6.0899°E / 49.5160; 6.0899 (Bettembourg West Bypass, Terminal South) ; 49°31′59″N 6°06′06″E / 49.5331°N 6.1017°E / 49.5331; 6.1017 (Bettembourg West Bypass, Terminal North)

Netherlands

Facility Length (km) Year of inauguration Voltage Coordinates of endpoints
Rotterdam Rhine waterway crossings 2.1 2005 380 kV

New Zealand

Facility Length (km) Year of inauguration Voltage Coordinates of endpoints
Brownhill–Pakuranga link 11 2012 220 kV 36°58′25″S 174°57′35″E / 36.9736°S 174.9597°E / -36.9736; 174.9597 (Brownhill transition substation) 36°55′34″S 174°54′23″E / 36.9261°S 174.9063°E / -36.9261; 174.9063 (Pakuranga Substation)
Auckland cross-harbour power cable
(Pakuranga–Albany)		 37 2014 220 kV 36°55′34″S 174°54′23″E / 36.9261°S 174.9063°E / -36.9261; 174.9063 (Pakuranga Substation) ; 36°44′22″S 174°41′27″E / 36.7395°S 174.6907°E / -36.7395; 174.6907 (Albany Substation)

Norway

Facility Length (km) Year of inauguration Voltage Coordinates of endpoints
Oslofjorden Cable Crossing 420 kV 59°20′36″N 10°28′44″E / 59.3432°N 10.4790°E / 59.3432; 10.4790 (Oslofjorden Cable, Terminal West) ; 59°21′55″N 10°39′42″E / 59.3654°N 10.6616°E / 59.3654; 10.6616 (Oslofjorden Cable, Terminal East)

Spain

Facility Length (km) Year of inauguration Voltage Coordinates of endpoints
Madrid Barajas Runway Tunnel 13 2003 380 kV 40°32′59″N 3°34′00″W / 40.5498°N 3.5667°W / 40.5498; -3.5667 (380 kV Cable Terminal) ; 40°27′03″N 3°31′17″W / 40.4509°N 3.5213°W / 40.4509; -3.5213 (380 kV Cable Terminal)

Switzerland/ Italy

Facility Length (km) Year of inauguration Voltage Coordinates of endpoints
Mendrisio – Cagno Interconnection 8 2008 400 45°48′50″N 8°54′11″E / 45.8140°N 8.9031°E / 45.8140; 8.9031 (Cagno Substation) ; 45°51′53″N 8°58′18″E / 45.8647°N 8.9717°E / 45.8647; 8.9717 (Mendrisio Substation)

United Kingdom

Facility Length (km) Year of inauguration Voltage Coordinates of endpoints
Beatrice Wind Farm, Moray Firth – Blackhillock substation, Moray[1] 70 2007, 2018 220 kV 58°7′48″N 3°4′12″W ; 57.4984°N 2.9883°W
Bicester, East Claydon – Bicester substations, Oxfordshire[2] 132 kV 51.92663°N 0.90307°W
Bradford, Bradford West – Kirkstall substations (line partly underground) Yorkshire[3] 275 kV 53.82822°N 1.77895°W
Brechfa Forest West onshore wind farm, Carmarthenshire[4] 2018 132 kV 51°59′00″N 04°09′50″W
Burbo Bank offshore wind farm, Liverpool Bay – onshore substation, Denbighshire[5] 2008, 2017 220 kV 53.48°N 3.26°W ;

53.26038°N 3.50465°W

Caithness-Moray Transmission link, Spittal, Caithness, Scotland – Blackhillock, Moray, Scotland[6] 113[7] 2019[8] 320 kV 58.4485°N 3.4376°W ; 57.4984°N 2.9883°W
Dinorwig power station – Pentir, Gwynedd[9][10] 1984 400 kV 53° 7′ 7″ N, 4° 6′ 50″ W ;

53.1723°N 4.1694°W

Dudgeon offshore wind farm – Necton substation, Norfolk[11] 2017 132kV 53.249°N 1.39°E ; 52.65838°N 0.80156°E
East Anglia one offshore wind farm – Bramford substation, Suffolk[12] >43 2020 220 kV 52°54′28″N 2°37′43″E ; 52.07049°N 1.06118°E
Edinburgh, Gardners Crescent – Dewar Place Substation, Edinburgh[13] 0.2 2010 275 kV 55.92991°N 3.18669°W
Fawley Tunnel (Fawley – Chilling), Hampshire[14] 3.2 1966 400 kV 50.826°N 1.314°W
Fawley – Langley, Hampshire[15] 132 kV 50.81551°N 1.34029°W
Greater Gabbard and Galloper Array offshore wind farms – Sizewell, Suffolk[16] >23 2012 and 2018 132 kV 51.8052°N 1.7855°E ;

52.215°N 1.61972°E

Gunfleet sands offshore wind farm, Clacton, Essex[17] 2010 132kV 51°44′22″N 1°10′28″E ;

51.7945°N 1.2543°E

Gwynt y Môr offshore wind farm –  Bodelwyddan substation, Denbighshire[18] >18 2015 132 kV 53°27′N 3°35′W ;

53.26038°N 3.50465°W

Hornsea offshore wind farm – Killingholme, North East Lincolnshire[19] 2019 220 kV 53.885°N 1.791°E ;

53.64225°N 0.26928°E

Hull, Creyke Bank – Hull South substations, Hull 132 kV 53.79994°N 0.41269°W
Hull, Sculcoates B – Cornwall Street substation, Hull 132 kV 53.76075°N 0.33407°W
Hull, Salt End substation – Hull East substation, Hull[20] 132 kV 53.74236°N 0.23795°W
HVDC Kingsnorth (Kingsnorth, Kent – Beddington – Willesden, London) 59 km + 26 km 1974 (decommissioned 1986) ± 266 kV 51.418947°N 0.602702°E ;

51.4011°N 0.1388°W

Isle of Wight submarine cables (Langley, Hampshire – Cowes & East Wooton, Isle of Wight) 132 kV 50.80967°N 1.35447°W ;

50.711304°N 1.254048°W

Kentish Flats offshore wind farm, Kent[21] 2005 33 kV 51°27′36″N 1°5′24″E ; 51.3548°N 1.08534°E
Laleham, Surrey – Ealing – Willesden, West London[22] 275 kV 51.4236°N 0.47021°W ; 51.5008°N 0.29402°W ; 51.53354°N 0.2553°W
Liverpool, Kirkby –Lister Drive City, Merseyside 10 2007 400 kV 53.46966°N 2.84288°W
London Array offshore wind farm – Cleve Hill, Kent[23] 2013 150 kV 51°38′N 1°29′E ;

51.3315°N 0.9303°E

London, St John’s Wood – City Road 400 kV 51.52666°N 0.16488°W ; 51.52832°N 0.09124°W
London, City Road – West Ham 400 kV 51.52832°N 0.09124°W ; 51.518684°N 0.002197°E
London, Beddington Cable Tunnel,(Beddington – Rowdown) 400 kV 51.36594°N 0.12324°W ; 51.34789°N 0.00954°W
London, Hertfordshire, Elstree to St. John’s Wood Deep Cable Tunnel 20 2005 400 kV 51.52666°N 0.16488°W ; 51.65512°N 0.32714°W
London, West Ham – Hackney (Lower Lea Valley Cable Tunnel) 6.3 2008 400 kV 51.518684°N 0.002197°E  ; 51.56108°N 0.05404°W
London, London Power Tunnels, (Hackney – St. John's Wood)[24] 12.5 2018 400 kV 51.56108°N 0.05404°W ; 51.53599°N 0.23703°W
London, London Power Tunnels (St. John's Wood – Kensal Green – Willesden) 7.4 2018 400 kV 51.52666°N 0.16488°W ; 51.53599°N 0.23703°W
London, London Power Tunnels (Kensal Green – Wimbledon) 12.1 2018 400 kV 51.52636°N 0.22584°W ; 51.42784°N 0.18237°W
London, Wimbledon – New Cross[25] 12 2025 (under construction) 400 kV 51.42784°N 0.18237°W ; 51.48082°N 0.06239°W
London, New Cross – Hurst[25] 18 2026  (under construction) 400 kV 51.48082°N 0.06239°W ; 51.43236°N 0.1541°E
London, Hurst – Crayford[25] 2.5 2024  (under construction) 400 kV 51.43236°N 0.1541°E ; 51.44775°N 0.17925°E
London, St. John's Wood – Tottenham substations[26] 275 kV 51.527499°N 0.169376°W ; 51.603178°N 0.048243°W
London, Tottenham – Redbridge substations 275 kV 51.603178°N 0.048243°W ; 51.588552°N 0.044926°E
Lynn and Inner  Dowsing offshore wind farms, Lincolnshire – Walpole substation, Norfolk 2009 132 kV 53°07′39″N 00°26′10″E ; 52.73139°N 0.2281°E
Moyle Interconnector (Auchencrosh, Dumfries and Galloway – Ballycronan More, County Antrim, Northern Ireland)[27] 63.5 2001 275 kV DC 55.07313°N 4.98188°W ; 54.83746°N 5.7806°W
Orrmonde offshore wind farm – Heysham, Lancashire[28] 2012 132 kV 54°6′N 3°24′W ; 54.0331°N 2.87913°W
Race Bank offshore wind farm – Walpole substation, Norfolk[29] 2018 250 kV 53.276°N 0.841°E ; 52.73139°N 0.2281°E
Rampion offshore wind farm – Bolney, Sussex[30] 2018 150 kV 50°40′0″N 0°16′0″W ; 50.97535°N 0.22574°W
Redcar, Lackenby –Thornton, part buried, Redcar and Cleveland 400 kV 54.5157°N 1.169°W
River Medway Cable Tunnels (Grain – Chetney Marsh), Kent 1.7 1977 400 kV 51°25'14.6"N 0°41'59.6"E ; 51°26'09.0"N 0°42'18.9"E
Severn-Wye Cable Tunnel (Aust – Newhouse) 3.6 1973 400 kV 51.608459°N 2.615454°W ; 51.610878°N 2.669090°W
Sheffield, Neepsend – Pitsmoor and Sheffield City substations, South Yorkshire 275 kV 53.4026°N 1.48569°W
Sheringhan Shoal offshore wind farm, Norfolk – substation, Norfolk[31] 2012 132 kV 53.135°N 1.147°E ; 52.76802°N 1.13913°E
Thanet offshore wind farm – Richborough, Kent 2010 132 kV 51.4306°N 1.6331°E ; 51.3101°N 1.35278°E
Walney and West of Duddon Sands offshore wind farms – Heysham Lancashire 2011, 2014, 2018 220 kV 54.044°N 3.522°W and 53.983°N 3.463°W ; 54.0331°N 2.87913°W
Western HVDC Link (Hunterston – Connah’s Quay) 422 2018 600 kV DC 55°43′20″N 4°53′24″W ; 53.232162°N 3.0813°W
Woodhead tunnel, South Yorkshire 4.888 1969[32] 400 kV 53.495659°N 1.829765°W ; 53.517377°N 1.765451°W
River Thames For crossings under the Thames see Powerline river crossings in the United Kingdom

UK – Europe

UK high voltage submarine connections to/from other countries
Facility Length (km) Year of inauguration Voltage Coordinates of endpoints
BritNed (Isle of Grain, Kent – Maasvlakte, Netherlands)[33] 260 2011 ±450 kV DC 51°26′24″N 0°43′0″E ; 51.96127°N 4.01617°E
East–West Interconnector (Shotton, Flintshire, Wales – Rush North Beach, County Dublin, Republic of Ireland)[34] 263 2012 ±200 V DC 53°13′38″N 3°4′22″W ;

53°28′16″N 6°34′3″W

HVDC Cross-Channel (Sellinge, Kent – Poste électrique des Mandarins, France)[35] 73 1986 ±270 kV DC 51.10452°N 0.98393°E ; 50.90776°N 1.72806°E
IFA-2 Interconnexion France-Angleterre (Fareham, Hampshire – Tourbe, France)[36] 204 Under construction ±320 kV DC 50.8217°N 1.18448°W ; 49.1139°N 0.2324°W
Isle of Man to England Interconnector (Bispham, Blackpool – Douglas Head, Isle of Man)[37] 104 2000 90 kV AC 53°50′57″N 03°01′46″W ;

54°08′52″N 4°28′51″W

Nemo Link (Richborough, Kent – Nemo Link Converter Station, Belgium)[38] 141.5 2019 400 kV DC 51.309239°N 1.344376°E ; 51.25245°N 3.17864°E
North Sea Link (Blyth, Northumberland – Kvilldal, Norway)[39] 730 2021 (under construction) ±515 kV DC 55.14364°N 1.54245°W ; 59.4965°N 6.6984°E

Canada

Facility Length (km) Year of inauguration Voltage Coordinates of endpoints
Trincomali Channel, AC-Cable ? ? 280 kV 48°52′46″N 123°24′10″W / 48.8794°N 123.4027°W / 48.8794; -123.4027 (Parker Island Cable Terminal) ; 48°51′48″N 123°27′09″W / 48.8632°N 123.4525°W / 48.8632; -123.4525 (Salt Spring Island Cable Terminal)
Galiano Island-Canadian Mainland, AC-Cable ? ? 280 kV 48°55′07″N 123°24′14″W / 48.9186°N 123.4040°W / 48.9186; -123.4040 (Galiano Island Cable Terminal) ; ?
Malaspina Strait Cable ? ? 500 kV 49°40′27″N 124°12′13″W / 49.6741°N 124.2035°W / 49.6741; -124.2035 (Cockburn Cable Terminal) ; 49°37′48″N 124°17′03″W / 49.6301°N 124.2842°W / 49.6301; -124.2842 (Texada Island Cable Terminal East)
Texada Island-Vancouver Island Cable ? ? 500 kV 49°35′25″N 124°21′30″W / 49.5903°N 124.3582°W / 49.5903; -124.3582 (Texada Island Cable Terminal West) ; 49°25′18″N 124°38′35″W / 49.4217°N 124.6431°W / 49.4217; -124.6431 (Nile Creek Cable Terminal)

References

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  30. ^ "The UK south coast's first offshore wind farm". Rampion Offshore. Retrieved 31 March 2020.{{cite web}}: CS1 maint: url-status (link)
  31. ^ "Sheringham Schoal". Sheringham Schoal. Retrieved 31 March 2020.{{cite web}}: CS1 maint: url-status (link)
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  33. ^ "BritNed". BritNed. Retrieved 30 March 2020.{{cite web}}: CS1 maint: url-status (link)
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  38. ^ "Interconnected to the heart of Europe's electricity market". Nemolink. Retrieved 30 March 2020.{{cite web}}: CS1 maint: url-status (link)
  39. ^ "North Sea Link". North Sea Link. Retrieved 30 March 2020.{{cite web}}: CS1 maint: url-status (link)
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