List of high voltage underground and submarine cables

From Wikipedia, the free encyclopedia

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 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
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

Dorset Area of Outstanding Natural Beauty[11] 9 2022 400kV 50°39′36″N 2°30′40″W / 50.660°N 2.511°W / 50.660; -2.511 ; 50°42′18″N 2°32′10″W / 50.705°N 2.536°W / 50.705; -2.536
Dudgeon offshore wind farm – Necton substation, Norfolk[12] 2017 132kV 53.249°N 1.39°E ; 52.65838°N 0.80156°E
East Anglia one offshore wind farm – Bramford substation, Suffolk[13] >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[14] 0.2 2010 275 kV 55.92991°N 3.18669°W
Fawley Tunnel (Fawley – Chilling), Hampshire[15] 3.2 1966 400 kV 50.826°N 1.314°W
Fawley – Langley, Hampshire[16] 132 kV 50.81551��N 1.34029°W
Greater Gabbard and Galloper Array offshore wind farms – Sizewell, Suffolk[17] >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[18] 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[19] >18 2015 132 kV 53°27′N 3°35′W ;

53.26038°N 3.50465°W

Hornsea offshore wind farm – Killingholme, North East Lincolnshire[20] 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[21] 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[22] 2005 33 kV 51°27′36″N 1°5′24″E ; 51.3548°N 1.08534°E
Laleham, Surrey – Ealing – Willesden, West London[23] 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[24] 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)[25] 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[26] 12 2025 (under construction) 400 kV 51.42784°N 0.18237°W ; 51.48082°N 0.06239°W
London, New Cross – Hurst[26] 18 2026  (under construction) 400 kV 51.48082°N 0.06239°W ; 51.43236°N 0.1541°E
London, Hurst – Crayford[26] 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[27] 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)[28] 63.5 2001 275 kV DC 55.07313°N 4.98188°W ; 54.83746°N 5.7806°W
Orrmonde offshore wind farm – Heysham, Lancashire[29] 2012 132 kV 54°6′N 3°24′W ; 54.0331°N 2.87913°W
Race Bank offshore wind farm – Walpole substation, Norfolk[30] 2018 250 kV 53.276°N 0.841°E ; 52.73139°N 0.2281°E
Rampion offshore wind farm – Bolney, Sussex[31] 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[32] 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[33] 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)[34] 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)[35] 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)[36] 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)[37] 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)[38] 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)[39] 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)[40] 730 2021 (Under testing phase) ±515 kV DC 55.14364°N 1.54245°W ; 59.4965°N 6.6984°E
Viking Link (Bicker Fen, Lincolnshire – Revsing, Denmark) 740 2023 (Under construction) ±525 kV DC 55.523056°N 8.709722°E ; 52.930278°N 0.220556°W

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)

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