EP0938102B1 - High voltage DC power cable - Google Patents

High voltage DC power cable Download PDF

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Publication number
EP0938102B1
EP0938102B1 EP99400308A EP99400308A EP0938102B1 EP 0938102 B1 EP0938102 B1 EP 0938102B1 EP 99400308 A EP99400308 A EP 99400308A EP 99400308 A EP99400308 A EP 99400308A EP 0938102 B1 EP0938102 B1 EP 0938102B1
Authority
EP
European Patent Office
Prior art keywords
cable
conductor
grounded
layer
return
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99400308A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0938102A2 (en
EP0938102A3 (en
Inventor
Georg Endre Balog
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nexans SA
Original Assignee
Nexans SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nexans SA filed Critical Nexans SA
Publication of EP0938102A2 publication Critical patent/EP0938102A2/en
Publication of EP0938102A3 publication Critical patent/EP0938102A3/en
Application granted granted Critical
Publication of EP0938102B1 publication Critical patent/EP0938102B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H01B9/028—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients with screen grounding means, e.g. drain wires

Definitions

  • the present invention relates to high voltage direct current (HVDC) cables and to subsea installation of such cables.
  • HVDC high voltage direct current
  • Such cables and installations are described in WO 97/04466 (G Balog 13), and GB 1 445 938.
  • UK 2 295 506 describes a HVDC system in which rectifier and convertors are connected by a DC link, the inverter extinction angle is used to control the rectifier firing angle in a closed loop to maintain the inverter extinction angle at or above predetermined values.
  • Each converter has a closed loop controller to control the firing angle in dependence upon DC current, DC voltage, own extinction angle and own firing angle.
  • DE 1 262 425 relates to a device for 'voltagewise relief' of cables in HVDC installations where both ends are connected to an AC network via 'smoothing' coils and rectifiers, - and where the feeding and the receiving AC network as well as the associated rectifier are such that the number of phases on the two AC sides do not contain the same prime numbers.
  • a normal way to transfer energy from one place to another across a body of water such as between Norway and Denmark, - is to use a HVDC cable having a central insulated conductor and use the seawater for the return current. This cable is installed between AC circuits having the same number of phases.
  • An alternative is to install a separate HVDC cable for the return current in parallel with the first cable. This is an expensive solution.
  • the object of the invention is to provide a new cable and a new installation technique in order to satisfy customers requirements for reliable long distance transfer of high energy between to locations which are separated by a body of water, - at a reasonable cost.
  • the cable crossection shows a central cable conductor having one or more layers of insulation material 2 enclosed within a metal sheath.
  • Inner and outer semiconductive layers arranged respectively over the cable conductor 1 and underneath the lead sheath 3 are not shown.
  • Over the lead sheath there are successively arranged an insulation sheath 4, reinforcements 5, armour 6, insulation 7, armour 8 and outer protective layers 9.
  • the conductor 1 may be a multiwire copper conductor.
  • the insulation 2 may be wrapped tapes or extruded insulation.
  • the metal sheath 3 may be a conventional lead alloy sheath.
  • the first layer 4 over the metal sheath may be a polymer such as polyethylene (PE). This layer may be semiconductive in order to avoid or reduce potential differences.
  • Transversal reinforcements 5 such as stainless steel tapes are arranged over the layer 5.
  • a two layer armour 6 which may be hard-drawn profiled copper wires.
  • an insulation sheath 7 which may be a PE sheath
  • an armour 8 which may consist of galvanized steel wires and outer protection 9 which may consist of polypropylene yarn and asphalt.
  • the central conductor should have a crossection of 1.600 mm2 and the return conductor some 1.900 mm2 .
  • the cable should preferably be buried in the sea bed, preferably down to 2.5m depth.
  • FIG 2 is schematically indicated the main parts (conductor 1, return conductor 6 and armour 8) installed between two end stations A and B.
  • the stations A and B include convertors (not shown) for interconnection with AC networks (not shown).
  • the conductor 1 transfers the cable current from A to B and the armour 8 is earthed continuously.
  • the concentrical return conductor 6 is connected to ground potential through surge arrestors (valves)10 and 11 installed in both ends of the cable, - and the return conductor is earthed midway between A and B. This earthing may be achieved with semiconductive material.
  • the earthing of metallic return conductor must be done in such a way that no circulating currents will exist. At the same time the converters must experience the true earth.
  • the circulating currents are divided according to the resistances in the different loops. As the sea can be regarded as a very large conductor, only the resistance in the leads to the electrodes, the electrode resistance and eventual resistance in earth defines the loop resistances.
  • a cable with a metallic return conductor will at 800 MW load experience approximately 10 kV DC voltage buildup at a 540 km length. It is possible to use resistors to limit the earth current, but it is undesireable with any earth current. Another approach is to hinder the circulating current by singlepoint bonding. If direct earthing of one of the valves are necessary this may be possible; but the other valve group at the other end would experience 10 kV to earth.

Landscapes

  • Insulated Conductors (AREA)
EP99400308A 1998-02-19 1999-02-10 High voltage DC power cable Expired - Lifetime EP0938102B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO980691 1998-02-19
NO19980691A NO310388B1 (no) 1998-02-19 1998-02-19 Höyspenningskabel og undersjöisk kabelinstallasjon

Publications (3)

Publication Number Publication Date
EP0938102A2 EP0938102A2 (en) 1999-08-25
EP0938102A3 EP0938102A3 (en) 2000-10-18
EP0938102B1 true EP0938102B1 (en) 2005-09-14

Family

ID=19901689

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99400308A Expired - Lifetime EP0938102B1 (en) 1998-02-19 1999-02-10 High voltage DC power cable

Country Status (5)

Country Link
EP (1) EP0938102B1 (no)
JP (1) JP4801236B2 (no)
AU (1) AU755659B2 (no)
DK (1) DK0938102T3 (no)
NO (1) NO310388B1 (no)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2197080A1 (en) 2008-12-09 2010-06-16 ABB Research Ltd. Flexible joint with resistive field grading material for HVDC cables and method for connecting same to HVDC cables
CN101211680B (zh) * 2006-12-26 2010-10-06 上海电缆厂有限公司 一种光纤复合电力海底充油电缆
US9396845B2 (en) 2012-03-14 2016-07-19 Yazaki Corporation Coaxial electric wire and method for manufacturing the same

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003046592A1 (en) * 2001-11-27 2003-06-05 Pirelli & C. S.P.A. Method for testing an electrical cable, modified electrical cable and process for producing it
EP1933333A1 (en) * 2006-12-15 2008-06-18 ABB Technology Ltd An electric power cable, an off-shore installation provided therewith, and use thereof
PL2294684T3 (pl) * 2008-06-09 2014-02-28 Abb Schweiz Ag Instalacja do przesyłu energii elektrycznej
JP5354259B2 (ja) * 2008-11-11 2013-11-27 住友電気工業株式会社 ソリッドケーブル
JP5864228B2 (ja) * 2011-11-21 2016-02-17 矢崎総業株式会社 高圧導電路及びワイヤハーネス
JP5986812B2 (ja) * 2011-11-21 2016-09-06 矢崎総業株式会社 ワイヤハーネス
WO2016191508A1 (en) * 2015-05-28 2016-12-01 Schlumberger Technology Corporation Lead alloy tape barrier
CN105405497A (zh) * 2015-12-16 2016-03-16 中天科技海缆有限公司 城市配网系统用正负极合一光纤复合柔性直流中压电缆
DE102016002881A1 (de) 2016-03-09 2017-09-14 nkt cables GmbH & Co.KG Gleichstrom-Kabelanlage mit metallischem Rückleiter
US11562834B2 (en) 2017-10-03 2023-01-24 Schlumberger Technology Corporation Lead alloy barrier tape splice for downhole power cable
US10535448B2 (en) * 2017-12-21 2020-01-14 Nexans Stainless steel screen and non-insulating jacket arrangement for power cables
CN110060806A (zh) * 2018-01-17 2019-07-26 南方电网科学研究院有限责任公司 一种水平导流电缆和深井型垂直接地极
CN110828052A (zh) * 2019-11-15 2020-02-21 中天科技海缆有限公司 直流海缆
CN111326288B (zh) * 2020-04-01 2021-03-30 杭州智海人工智能有限公司 一种风力发电高压直流海缆

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO449373L (no) * 1973-11-26 1975-06-23 Standard Tel Kabelfab As
JPS5556302A (en) * 1978-10-04 1980-04-25 Showa Electric Wire & Cable Co Power cable line
US4256921A (en) * 1979-01-22 1981-03-17 George Bahder Moisture resistant cable
JPS5637409U (no) * 1979-08-31 1981-04-09
JPS5924083Y2 (ja) * 1979-08-31 1984-07-17 住友電気工業株式会社 電力用単心鉛被水底ケ−ブル
JPS5943616Y2 (ja) * 1979-09-01 1984-12-25 住友電気工業株式会社 電力用単心鉛被水底ケ−ブル
JPS58201515A (ja) * 1982-05-17 1983-11-24 住友電気工業株式会社 ケ−ブルの水トリ−による絶縁劣化防止方法
JPH0641290Y2 (ja) * 1985-04-23 1994-10-26 住友電気工業株式会社 単心交流電力用水底ケ−ブル
JPH0579814U (ja) * 1992-03-27 1993-10-29 日立電線株式会社 架橋ポリエチレン絶縁鉛被シースケーブル
JPH05300057A (ja) * 1992-04-21 1993-11-12 Fujitsu Ltd 海中分岐装置の給電回路
JP3417590B2 (ja) * 1993-01-18 2003-06-16 住友電気工業株式会社 直流水底電力ケーブル線路
JP3822331B2 (ja) * 1997-10-09 2006-09-20 株式会社フジクラ 中性線複合直流電力ケーブル及び直流電力ケーブル線路

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101211680B (zh) * 2006-12-26 2010-10-06 上海电缆厂有限公司 一种光纤复合电力海底充油电缆
EP2197080A1 (en) 2008-12-09 2010-06-16 ABB Research Ltd. Flexible joint with resistive field grading material for HVDC cables and method for connecting same to HVDC cables
US9396845B2 (en) 2012-03-14 2016-07-19 Yazaki Corporation Coaxial electric wire and method for manufacturing the same

Also Published As

Publication number Publication date
JP4801236B2 (ja) 2011-10-26
NO980691L (no) 1999-08-20
JPH11273466A (ja) 1999-10-08
EP0938102A2 (en) 1999-08-25
NO310388B1 (no) 2001-06-25
EP0938102A3 (en) 2000-10-18
DK0938102T3 (da) 2006-01-30
AU1740799A (en) 1999-09-02
AU755659B2 (en) 2002-12-19
NO980691D0 (no) 1998-02-19

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