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Submarine power cable

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the core is surrounded by concentric armoring. In three-core cables, three cable cores are laid-up in a spiral configuration before the armoring is applied. The armoring consists most often of steel wires, soaked in bitumen for corrosion protection. Since the alternating magnetic field in AC cables causes losses in the armoring, those cables are sometimes equipped with non-magnetic metallic materials (stainless steel, copper, brass).
32: 1809:(AAPL), or the Australia–Singapore Power Link (ASPL), is a proposed electricity infrastructure project that is planned to include the world's longest submarine power cable. A solar farm in Northern Territory, Australia, will produce 10 gigawatts of electricity, most of which will be exported to Singapore by a 4,500 km (2,800 mi) 3 GW HVDC transmission line. 224:, with an insulation thickness of up to about 30 mm; 36 kV class cables have only 5.5 – 8 mm insulation thickness. Certain formulations of XLPE insulation can also be used for DC. Low-pressure oil-filled cables have an insulation lapped from paper strips. The entire cable core is impregnated with a low- 249:
Cables ≥ 52 kV are equipped with an extruded lead sheath to prevent water intrusion. No other materials have been accepted so far. The lead alloy is extruded onto the insulation in long lengths (over 50 km is possible). In this stage the product is called cable core. In single-core cables
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For larger amounts of transmitted power, the AC systems are composed of three separate single-core underwater cables, each containing just one insulated conductor and carrying one phase of the three phase electric current. A fourth identical cable is often added in parallel with the other three,
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or aluminum wires, the latter material having a small but increasing market share. Conductor sizes ≤ 1200 mm are most common, but sizes ≥ 2400 mm have been made occasionally. For voltages ≥ 12 kV the conductors are round so that the insulation is exposed to a uniform
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Black Sea submarine electric cable with a capacity of 1 GW and voltage of 500 kV will transfer green electricity from Azerbaijan through Georgia, Romania, Moldova to the EU. It is estimated to be approximately 1100 km in length and to be built in late
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Two 3-core XLPE cables with total capacity of 2x200MVA. 174 km total length including the underground segments. Maximum depth 1000m. Total cost 380 million EUR. It is the longest submarine/underground AC cable interconnection in the world.
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at each end of a direct current line to interface to an alternating current grid. A system using submarine power cables may be less costly overall if using high-voltage direct current transmission, especially on a long link where the
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risk with cable damage. Mass-impregnated cables have also a paper-lapped insulation but the impregnation compound is highly viscous and does not exit when the cable is damaged. Mass-impregnated insulation can be used for massive
204:. The conductor can be stranded from individual round wires or can be a single solid wire. In some designs, profiled wires (keystone wires) are laid up to form a round conductor with very small interstices between the wires. 1961:, a 1,707 km submarine power cable, reaching depths of up to 3 km (1.9 mi) under sea level, with the capacity to transmit 2,000 megawatts of electricity connecting Africa and Europe (Egypt–Cyprus–Greece) 1815:, a 1,520 km submarine power cable, reaching depths of up to 3 km (1.9 mi) under sea level, with the capacity to transmit 2,000 megawatts of electricity connecting Asia and Europe (Israel–Cyprus–Greece) 2155: 2095: 2212: 2579: 303:
can be constructed with three-core cables in which all three insulated conductors are placed into a single underwater cable. Most offshore-to-shore wind-farm cables are constructed this way.
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to Scotland. It would be 1,000 to 1,500 km long "and by far the longest in the world." assuming a longer cable not yet built like the proposed 4,200 km Australia–Singapore cable
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Subsea Cables UK - An organisation of submarine cable owners, operators and suppliers aimed at promoting marine safety and protecting cable installations on the UK continental shelf
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or synthetic). A central oil channel in the conductor facilitates oil flow in cables up to 525 kV for when the cable gets warm but rarely used in submarine cables due to
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simply as a spare in case one of the three primary cables is damaged and needs to be replaced. This damage can happen, for example, from a ship's
2739: 2435: 1965: 2358: 2887: 2918: 2291:(in Russian) to Russian federal program "Socio-economic development of the Republic of Crimea and the city of Sevastopol until 2020 ". 2264:"P.E.I.'s underwater electric cable project officially plugged in - New underwater cables supply about 75% of the Island's electricity" 2931: 2069: 2967: 2554: 2507: 2131:"The 132,000 volt submarine cable in the Mainland - Vancouver Island interconnection : part 3, cable laying - RBCM Archives" 279:
of the cable would require too much additional charging current. The inner and outer conductors of a cable form the plates of a
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below the surface of the water. These are called "submarine" because they usually carry electric power beneath
2187:"Energy Infrastructures in the Mediterranean: Fine Accomplishments but No Global Vision", Abdelnour Keramane, 2041: 2613: 1745: 456: 311:
carelessly dropped onto it. The fourth cable can substitute for any one of the other three, given the proper
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Application for Authority to Sell Transmission Rights at Negotiated Rates and Request for Expedited Action
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1954, the first HVDC submarine power cable (non-experimental) Gotland 2 and 3 installed in 1983 and 1987.
1991: 1146: 726: 267: 2664: 300: 2762: 2747: 2462: 2380: 2171: 2011: 1958: 1730: 695: 217: 3018: 1996: 1615: 2366: 19: 2975: 2968:"Proposed 11kV Submarine Cables Replacement Connecting Liu Ko Ngam and Pak Sha Tau Tsui at Kat O" 2950:"EEHC, Euro Africa Company sign MoU to conduct a feasibility study to link Egypt, Cyprus, Greece" 2399: 1812: 1726: 1313: 213: 201: 168: 113: 2288: 675: 670: 271: 24: 2508:"Skagerrak An excellent example of the benefits that can be achieved through interconnections" 1920:
The British and Icelandic Governments are supposedly in "active discussion" to build a cable (
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for data transmission or temperature measurement, in addition to the electrical conductors.
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Operations started on February 1, 2016 with an initial power transmission at 30 MW.
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Please help update this article to reflect recent events or newly available information.
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in 2010 the world's highest-capacity long-distance submarine power cable (rated at 1400
2515: 1211: 1046: 646: 86: 1756:, a 740 km cable to provide the two countries with 1,400 MW transmission by 2022. 2672: 2536: 2116: 1902:(Taipower) at this level, scheduled for completion in 2014. On 24 December 2010, the 1691: 1292: 1181: 1155: 1107: 937: 927: 837: 680: 588: 389: 312: 3033: 2665:"Australia Fast Tracks Approval Process for $ 16 Billion Solar Power Export Project" 85:). Examples of the latter exist that connect the mainland with large islands in the 2717: 1933: 1297: 1287: 1258: 427: 417: 398: 378: 196: 156: 2195: 1952: 1914: 1056: 1001: 738: 733: 708: 2949: 2046: 1884: 1864: 1855: 1834: 1829:
for the most ambitious underwater transmission project yet. Beginning south of
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submarine power cable system (T–P-cable), the first submarine project of the
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Twelve, separate, oil filled single-phase cables. Nominal rating 1200 MW.
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500 MW link went online in 2017 with two subsea HVdc cables spanning the
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History of the Atlantic Cable & Undersea Communications—Power Cables
2199: 1373: 1243: 1022: 896: 811: 601: 127: in this section. Unsourced material may be challenged and removed. 73:, etc.) but it is also possible to use submarine power cables beneath 2070:"Crete-Peloponnese: The record-breaking interconnection is completed" 1874: 1647: 1552: 1503: 1436: 1253: 967: 906: 876: 851: 280: 225: 221: 102: 1948: 1925: 1910: 1830: 1696: 1519: 1492: 1381: 1340: 1248: 1161: 847: 831: 787: 544: 328: 220:(XLPE) is used up to 420 kV system voltage. It is produced by 58: 1530: 482:
A second one from 2006 Maximum depth: 660 m (2,170 ft).
2440: 1929: 1921: 1822: 1741: 1589: 1441: 1386: 1328: 1165: 1091: 1007: 996: 990: 962: 911: 866: 806: 596: 463: 2640:"Quadrilateral agreement inked on Black Sea electric cable Link" 1944: 1895: 1891: 1849: 1671: 1666: 1585: 1547: 1351: 1318: 1194: 1082: 1051: 816: 742: 570: 539: 512: 447: 358: 349: 308: 299:(AC) submarine cable systems for transmitting lower amounts of 70: 3024:
Export cables from Offshore Wind farms to Offshore substations
31: 2327:"European Subsea Cables Association - Submarine Power Cables" 1973: 1870: 1226: 973: 565: 517: 451: 354: 82: 62: 2760: 1719: 2932:"ENERGY: EuroAfrica 2,000MW cable boosts Egypt-Cyprus ties" 1571:
700 MW in 2012 previously the longest undersea power cable
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and the more-populous North Island. Commissioned in 1965.
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The purpose of submarine power cables is the transport of
2400:"New UK-Belgium power link to start operating on Jan. 31" 66: 3013: 1821:, 335-mile line. The Transmission Developers Company of 175:). Modern three-core cables (e.g. for the connection of 2436:"Power successfully transmitted through NordBalt cable" 2785:"Territory to Study Linking Power Grid to Puerto Rico" 1343:). This power cable connects two large islands in the 1206:
Total length of the line is 313 km (194 mi)
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List of high voltage underground and submarine cables
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Transoceanic electric power line placed on the seabed
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Transmission cables from Offshore converter to shore
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Electricity Cable Aims to Link Cyprus, Egypt, Greece
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Underwater Cable an Alternative to Electrical Towers
171:, and protective layers (resembling the design of a 2740:"Cyprus group plans Greece-Israel electricity link" 23:Cross section of the submarine power cable used in 3019:Subsea Cables UK article on Submarine Power Cables 2821:"Malta signs €182 million interconnector contract" 2807:HVDC Transmission & India-Sri Lanka Power Link 1764: 1713:Longest 2200 MW cable, first 600kV undersea cable 2767:, Federal Energy Regulatory Commission, p. 7 591:". A second 380 kV cable began operation in 2016 3041: 2754: 1833:, a 335-mile line would run along the bottom of 1186:Italian mainland - Galatina HVDC Static Inverter 258:Most electrical power transmission systems use 2202:), under publication. Consulted 28 March 2014. 2117:"Crete – Peloponnese 150kV AC Interconnection" 1964:11 kV submarine replacement cables connecting 1308:In operation in 1968 and was extended in 1977 2345:"Sardinia's electricity transmission network" 2037: 2035: 2033: 291: 3014:The International Cable Protection Committee 2883:Interconnexion France Aurigny Grand-Bretagne 1298:mainland of the Province of British Columbia 216:around the conductor are mainly used today. 2761:Transmission Developers Inc. (2010-05-03), 2705: 2285:The corresponding page on Russian Knowledge 2859: 2256: 2030: 1133:between the power-rich South Island (much 3036:(Cross sections of historic power cables) 1720:Submarine power cables under construction 143:Learn how and when to remove this message 2397: 2178:, May 1, 2007. Consulted March 28, 2014. 1879:220 kV HVAC, 225 megawatts, 117 km 1610:1.4 GW the longest undersea power cable 761: 30: 18: 2455: 2200:European Institute of the Mediterranean 2174:, Ramón Granadino and Fatima Mansouri, 1917:in Taiwan Island to the Penghu Islands. 1164:, and its neighboring French island of 3042: 2839:"Taiwan power company-Taipower Events" 2213:"Mit der Zukunft Geschichte schreiben" 266:can easily change voltages as needed. 92: 2881:website fablink.net, as well as (fr) 2176:Transmission & Distribution World 2135:search-bcarchives.royalbcmuseum.bc.ca 663:Isle of Man to England Interconnector 2696:The EuroAsia Interconnector document 2422:Neptune Regional Transmission System 1768: 125:adding citations to reliable sources 96: 2398:Chestney, Nina (January 14, 2019). 13: 2986:from the original on 13 March 2022 2862:"Iceland's volcanoes may power UK" 2689: 2657: 2050:, 2010-03-16, accessed 2010-03-18. 287:Operational submarine power cables 14: 3066: 3002: 2906:www.euroafrica-interconnector.com 2888:Réseau de Transport d'Électricité 2860:Carrington, Damian (2012-04-11). 2580:"Kabel til England - Viking Link" 2172:"A Bridge Between Two Continents" 2119:– via www.researchgate.net. 1729:between the Canadian province of 2885:website rte-france.com, site of 2161:from the original on 2021-05-26. 1773: 1725:500 MW capacity, 165 km DC 1197:- Arachthos HVDC Static Inverter 1072:very high power cable (2000 MW) 734:Taman Peninsula, Mainland Russia 101: 39:Green=decided/under construction 2960: 2942: 2924: 2912: 2894: 2872: 2853: 2831: 2813: 2799: 2791:. June 29, 2010. Archived from 2777: 2732: 2700:www.euroasia-interconnector.com 2632: 2601: 2572: 2557:. Nalcor Energy. Archived from 2547: 2529: 2500: 2479: 2428: 2410: 2391: 2385:Emera Newfoundland and Labrador 2373: 2351: 2337: 2319: 2294: 2278: 2227: 2205: 1837:, and then down the bed of the 1765:Proposed submarine power cables 507:A 3 core, XLPE insulated cable 112:needs additional citations for 2381:"Maritime Link Infrastructure" 2181: 2165: 2141: 2123: 2109: 2080: 2062: 2053: 2018:Submarine communications cable 1819:Champlain Hudson Power Express 985:Inaugurated 20 September 2012 704:Cape Tormentine, New Brunswick 585:Messina Strait submarine cable 35:HVDC connections around Europe 1: 2023: 1752:, respectively) are building 457:Spain-Morocco interconnection 207: 2746:. 2012-01-23. Archived from 2487:"The Norned HVDC Cable Link" 2406:– via www.reuters.com. 2359:"THE KONTI-SKAN HVDC SCHEME" 1913:was approved to connect the 1905:Taiwan-Penghu Undersea Cable 1883:between Magħtab, Malta, and 1485:104.6 km (65.0 mi) 922:Commissioned September 2019 186: 7: 3055:Electric power transmission 2921:Bloomberg, February 8, 2017 2902:"EuroAfrica Interconnector" 2235:"Wolfe Island Wind Project" 2219:(in German). Archived from 1992:Electric power transmission 1980: 1881:Malta–Sicily interconnector 1825:, is proposing "to use the 1274:63.5 km (39.5 mi) 1176:3 cables, 1967, 1988, 1992 1147:HVDC Italy-Corsica-Sardinia 727:Prince Edward Island Cables 698:submarine cable for 245 kV 533:Malta–Sicily interconnector 268:High-voltage direct current 253: 244: 10: 3071: 1807:Australia–ASEAN Power Link 1727:Maritime Transmission Link 1661:4 cables - 1700 MW in all 765: 301:three-phase electric power 292:Alternating current cables 241:cables up to 525 kV. 2609:"Denmark - National Grid" 2555:"Lower Churchill Project" 2541:www.westernhvdclink.co.uk 2289:the June 15, 2015 changes 2217:Dithmarscher Kreiszeitung 2012:Electrical interconnector 1959:EuroAfrica Interconnector 1782:This section needs to be 1731:Newfoundland and Labrador 1710:422 km (262 mi) 1658:240 km (150 mi) 1632:260 km (160 mi) 1607:720 km (450 mi) 1568:580 km (360 mi) 1539:623 km (387 mi) 1511:400 km (250 mi) 1424:170 km (110 mi) 1173:385 km (239 mi) 1039:233 km (145 mi) 982:186 km (116 mi) 976:and thus the British grid 919:325 km (202 mi) 889:260 km (160 mi) 859:290 km (180 mi) 824:250 km (160 mi) 418:Mainland British Columbia 379:Mainland British Columbia 218:Cross-linked polyethylene 212:Three different types of 2363:www.transmission.bpa.gov 2266:. CBC News. Aug 29, 2017 1997:Single-wire earth return 1616:Shetland HVDC Connection 1455:140 km (87 mi) 1394:149 km (93 mi) 1203:160 km (99 mi) 1015:105 km (65 mi) 957:East–West Interconnector 848:island State of Tasmania 545:Bornholm Island, Denmark 270:transmission requires a 260:alternating current (AC) 2976:Government of Hong Kong 1813:EuroAsia Interconnector 1336:50 km (31 mi) 1314:Kii Channel HVDC system 1130:40 km (25 mi) 1099:98 km (61 mi) 1069:73 km (45 mi) 202:electric field gradient 3050:Submarine power cables 1601:United Kingdom, Norway 1160:the Italian island of 676:Wolfe Island Wind Farm 424:to Nile Creek Terminal 177:offshore wind turbines 42: 28: 25:Wolfe Island Wind Farm 2242:Canadian Copper CCBDA 2002:List of HVDC projects 1542:Operational May 2021 1478:Long Island, New York 1345:Japanese Home Islands 1283:HVDC Vancouver Island 933:Long Island, New York 768:List of HVDC projects 762:Direct current cables 694:The first three-core 430:/ Dunsmuir Substation 388:, Parker Island, and 47:submarine power cable 34: 22: 2014:, e.g. between grids 1900:Taiwan Power Company 1890:The 58.9-km, 161-kV 1733:and the province of 1265:, and thence to the 943:State of Connecticut 671:Wolfe Island, Canada 313:electrical switching 121:improve this article 2979:. 22 January 2016. 2956:. February 6, 2017. 2938:. February 8, 2017. 2843:www.taipower.com.tw 2463:"NordLink - TenneT" 2306:www.basslink.com.au 2044:, Matthew L. Wald, 1987:Cable landing point 1468:State of New Jersey 1267:Republic of Ireland 1135:hydroelectric power 469:Strait of Gibraltar 297:Alternating-current 214:electric insulation 169:electric insulation 93:Design technologies 2954:dailynewsegypt.com 2302:"Basslink - About" 2194:2020-10-20 at the 1212:HVDC Leyte - Luzon 1090:Swedish island of 1047:HVDC Cross-Channel 647:Bispham, Blackpool 228:insulation fluid ( 87:St. Lawrence River 51:transmission cable 43: 29: 2809:www.geni.org 2010 2795:on July 16, 2011. 2789:stcroixsource.com 1803: 1802: 1744:power companies ( 1717: 1716: 1692:Western HVDC Link 1652:Denmark (Jutland) 1293:Strait of Georgia 1182:HVDC Italy-Greece 1156:Mediterranean Sea 1108:HVDC Inter-Island 938:Long Island Sound 928:Cross Sound Cable 838:State of Victoria 793:Undersea distance 759: 758: 665:, a 3 core cable 626:, the Philippines 589:Pylons of Messina 390:Saltspring Island 153: 152: 145: 3062: 2996: 2995: 2993: 2991: 2985: 2972: 2964: 2958: 2957: 2946: 2940: 2939: 2936:Financial Mirror 2928: 2922: 2916: 2910: 2909: 2898: 2892: 2876: 2870: 2869: 2857: 2851: 2850: 2845:. 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Archived from 2084: 2078: 2077: 2066: 2060: 2057: 2051: 2039: 1970:Pak Sha Tau Tsui 1934:geothermal power 1823:Toronto, Ontario 1798: 1795: 1789: 1777: 1776: 1769: 1620:Shetland islands 1524:Ertsmyra, Norway 1288:Vancouver Island 1259:Northern Ireland 1152:Italian mainland 1083:Swedish mainland 772: 771: 681:Kingston, Canada 428:Vancouver Island 399:Vancouver Island 318: 317: 157:electric current 148: 141: 137: 134: 128: 105: 97: 37:Red=in operation 3070: 3069: 3065: 3064: 3063: 3061: 3060: 3059: 3040: 3039: 3005: 3000: 2999: 2989: 2987: 2983: 2970: 2966: 2965: 2961: 2948: 2947: 2943: 2930: 2929: 2925: 2917: 2913: 2900: 2899: 2895: 2877: 2873: 2858: 2854: 2837: 2836: 2832: 2819: 2818: 2814: 2804: 2800: 2783: 2782: 2778: 2770: 2768: 2759: 2755: 2738: 2737: 2733: 2724: 2722: 2711: 2710: 2706: 2694: 2690: 2681: 2679: 2663: 2662: 2658: 2649: 2647: 2638: 2637: 2633: 2624: 2622: 2607: 2606: 2602: 2593: 2591: 2578: 2577: 2573: 2564: 2562: 2553: 2552: 2548: 2535: 2534: 2530: 2521: 2519: 2506: 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Index


Wolfe Island Wind Farm

transmission cable
electric power
salt water
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seas
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lakes
rivers
St. Lawrence River

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electric current
high voltage
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electric insulation
coaxial cable
offshore wind turbines
optical fibers
conductor
copper
electric field gradient
electric insulation
Cross-linked polyethylene

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