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EP1113461A1 - A bi-polar integrated concentric cable - Google Patents

A bi-polar integrated concentric cable Download PDF

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Publication number
EP1113461A1
EP1113461A1 EP99403317A EP99403317A EP1113461A1 EP 1113461 A1 EP1113461 A1 EP 1113461A1 EP 99403317 A EP99403317 A EP 99403317A EP 99403317 A EP99403317 A EP 99403317A EP 1113461 A1 EP1113461 A1 EP 1113461A1
Authority
EP
European Patent Office
Prior art keywords
insulation
conductor
thickness
concentric cable
cable
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.)
Withdrawn
Application number
EP99403317A
Other languages
German (de)
French (fr)
Inventor
Georg 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
Alcatel CIT SA
Alcatel SA
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 Alcatel CIT SA, Alcatel SA, Nexans SA filed Critical Alcatel CIT SA
Priority to EP99403317A priority Critical patent/EP1113461A1/en
Priority to JP2000374248A priority patent/JP2001189113A/en
Priority to AU72343/00A priority patent/AU7234300A/en
Publication of EP1113461A1 publication Critical patent/EP1113461A1/en
Withdrawn legal-status Critical Current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
    • H01B9/04—Concentric cables

Definitions

  • the present invention is related to a bipolar integrated concentric cable according to the preamble of the claims.
  • HVDC cables have been in two configurations; either in mono-polar or in bipolar circuits.
  • the mono-polar circuit consists of one high voltage cable and earth, sea or metallic return conductor is employed to complete the circuit.
  • the bipolar circuit consists of two high voltage cables usually with equal rating, but with opposite polarity.
  • Another limitation of prior art cables is the fact that to reduce the magnetic fields around the cables to a minimum the two cables must be laid very near each other or must be touching each other. This increases the complexity of laying the cables also.
  • a cable of the described type is disclosed in EP 0 938 102, comprising a central conductor having a negative polarity, a first insulation layer, a second conductor, a second insulation layer and an outer sheath.
  • the bipolar integrated concentric cable according to the present invention can be used for bipolar as well as monopolar transmissions and avoids the disadvantages of prior art cables, such as environmental problems. This is achieved with the cable according to the invention as defined with the features stated in the claims.
  • a center conductor 1 is surrounded concentrically by a number of layers, the major of which is an insulation 2, surrounded by a second conductor 3.
  • a second insulation 4 is surrounding a second conductor 3 and is surrounded by a lead sheath 5.
  • a plastic sheath 6 Inside the outer armour layer 7 is a plastic sheath 6, comprising reinforcement.
  • the first and second insulations 2 and 4 are made of the same materials, such as thin PP-film. Up to 50 kV to earth the thickness of both insulations may be the same, however from 50 to 100 kV the thickness of the insulation 4 increases twice as fast as for the insulation 2, e.g. at 100 kV and higher to earth, insulation 4 is twice as thick as insulation 2.
  • the losses through insulation 2 are approximately twice the losses through insulation 4, which influences the thickness of insulation 2.
  • the cable according to the present invention furthermore has both conductors inside the metallic sheath, both of which are at high voltage and insulated from the ground.
  • the voltage between the center conductor and the outer conductor is twice the sum of the nominal voltages to ground.
  • the thickness of the first insulation 2 may be up to twice the thickness of the insulation 4 between the second conductor 3 and the outer metallic sheath. Because of the fast increase in the cable size the present invention is mainly aimed for low to medium transmission capacities, such as up to 350 to 400 MW and voltages up to approximately 200 kV.
  • the present invention results in a cable with rotational symmetric cross-section that allows both phases to be laid and eventually buried in one campaign with conventional technology. It also allows the present invention to be laid to large depths.

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  • Insulated Conductors (AREA)

Abstract

A bipolar integrated concentric cable, comprising a central conductor (1) connected to the negative polarity, concentric layers of insulation (2, 4) and a second conductor (3) connected to positive polarity, the inner insulation (2) and the outer insulation (4) being made of the same material, the thickness of the outer insulation (4) increasing twice as much as the thickness of the inner insulation (2) by increased voltage.

Description

  • The present invention is related to a bipolar integrated concentric cable according to the preamble of the claims.
  • HVDC cables have been in two configurations; either in mono-polar or in bipolar circuits. The mono-polar circuit consists of one high voltage cable and earth, sea or metallic return conductor is employed to complete the circuit. The bipolar circuit consists of two high voltage cables usually with equal rating, but with opposite polarity. Another limitation of prior art cables is the fact that to reduce the magnetic fields around the cables to a minimum the two cables must be laid very near each other or must be touching each other. This increases the complexity of laying the cables also.
  • A cable of the described type is disclosed in EP 0 938 102, comprising a central conductor having a negative polarity, a first insulation layer, a second conductor, a second insulation layer and an outer sheath.
  • The bipolar integrated concentric cable according to the present invention, can be used for bipolar as well as monopolar transmissions and avoids the disadvantages of prior art cables, such as environmental problems. This is achieved with the cable according to the invention as defined with the features stated in the claims.
  • The only figure discloses a cross section of the cable according to the present invention.
  • A center conductor 1 is surrounded concentrically by a number of layers, the major of which is an insulation 2, surrounded by a second conductor 3. A second insulation 4 is surrounding a second conductor 3 and is surrounded by a lead sheath 5.
  • Inside the outer armour layer 7 is a plastic sheath 6, comprising reinforcement.
  • According to the invention, the first and second insulations 2 and 4 are made of the same materials, such as thin PP-film. Up to 50 kV to earth the thickness of both insulations may be the same, however from 50 to 100 kV the thickness of the insulation 4 increases twice as fast as for the insulation 2, e.g. at 100 kV and higher to earth, insulation 4 is twice as thick as insulation 2. The losses through insulation 2 are approximately twice the losses through insulation 4, which influences the thickness of insulation 2.
  • For the cable according to the invention negative polarity is connected to the central conductor 1 and the positive polarity is connected to the second conductor 3. The cable according to the present invention furthermore has both conductors inside the metallic sheath, both of which are at high voltage and insulated from the ground.
  • The voltage between the center conductor and the outer conductor is twice the sum of the nominal voltages to ground. The thickness of the first insulation 2 may be up to twice the thickness of the insulation 4 between the second conductor 3 and the outer metallic sheath. Because of the fast increase in the cable size the present invention is mainly aimed for low to medium transmission capacities, such as up to 350 to 400 MW and voltages up to approximately 200 kV.
  • The present invention results in a cable with rotational symmetric cross-section that allows both phases to be laid and eventually buried in one campaign with conventional technology. It also allows the present invention to be laid to large depths.

Claims (1)

  1. A bipolar integrated concentric cable, comprising a central conductor (1) connected to the negative polarity, concentric layers of insulation (2, 4) and a second conductor (3) connected to positive polarity, characterized by the inner insulation (2) and the outer insulation (4) being made of the same material, the thickness of the outer insulation (4) increasing twice as much as the thickness of the inner insulation (2) by increased voltage.
EP99403317A 1999-12-30 1999-12-30 A bi-polar integrated concentric cable Withdrawn EP1113461A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP99403317A EP1113461A1 (en) 1999-12-30 1999-12-30 A bi-polar integrated concentric cable
JP2000374248A JP2001189113A (en) 1999-12-30 2000-12-08 Bipolar integrated coaxial cable
AU72343/00A AU7234300A (en) 1999-12-30 2000-12-15 A bi-polar integrated concentric cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99403317A EP1113461A1 (en) 1999-12-30 1999-12-30 A bi-polar integrated concentric cable

Publications (1)

Publication Number Publication Date
EP1113461A1 true EP1113461A1 (en) 2001-07-04

Family

ID=8242240

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99403317A Withdrawn EP1113461A1 (en) 1999-12-30 1999-12-30 A bi-polar integrated concentric cable

Country Status (3)

Country Link
EP (1) EP1113461A1 (en)
JP (1) JP2001189113A (en)
AU (1) AU7234300A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012098906A1 (en) * 2011-01-21 2012-07-26 Yazaki Corporation High-voltage conductive path and wiring harness
WO2013077463A1 (en) * 2011-11-21 2013-05-30 Yazaki Corporation Wire harness
WO2013077462A1 (en) * 2011-11-21 2013-05-30 Yazaki Corporation High voltage conductive wire and wire harness
CN103703521A (en) * 2011-07-25 2014-04-02 矢崎总业株式会社 High-voltage conduction path and wiring harness
EP2894732A1 (en) * 2012-09-03 2015-07-15 Yazaki Corporation Core wire insulating structure and insulating method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1011025B (en) * 1956-09-14 1957-06-27 Siemens Ag DC high voltage cables
US3869621A (en) * 1973-08-17 1975-03-04 Massachusetts Inst Technology Graded contained bulk transmission system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1011025B (en) * 1956-09-14 1957-06-27 Siemens Ag DC high voltage cables
US3869621A (en) * 1973-08-17 1975-03-04 Massachusetts Inst Technology Graded contained bulk transmission system

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9305681B2 (en) 2011-01-21 2016-04-05 Yazaki Corporation High-voltage conductive path and wiring harness
US20140014395A1 (en) * 2011-01-21 2014-01-16 Yazaki Corporation High-voltage conductive path and wiring harness
CN103329218A (en) * 2011-01-21 2013-09-25 矢崎总业株式会社 High-voltage conductive path and wiring harness
WO2012098906A1 (en) * 2011-01-21 2012-07-26 Yazaki Corporation High-voltage conductive path and wiring harness
CN103703521B (en) * 2011-07-25 2016-12-28 矢崎总业株式会社 High pressure conductive and wire harness
CN103703521A (en) * 2011-07-25 2014-04-02 矢崎总业株式会社 High-voltage conduction path and wiring harness
US9252575B2 (en) 2011-07-25 2016-02-02 Yazaki Corporation High-voltage conduction path and wiring harness
CN103946069A (en) * 2011-11-21 2014-07-23 矢崎总业株式会社 Wire harness
CN103958278A (en) * 2011-11-21 2014-07-30 矢崎总业株式会社 High voltage conductive wire and wire harness
US9236720B2 (en) 2011-11-21 2016-01-12 Yazaki Corporation High voltage conductive wire and wire harness
WO2013077463A1 (en) * 2011-11-21 2013-05-30 Yazaki Corporation Wire harness
CN103958278B (en) * 2011-11-21 2016-03-30 矢崎总业株式会社 High-pressure conductive line and wire harness
US9346420B2 (en) 2011-11-21 2016-05-24 Yazaki Corporation Wire harness
WO2013077462A1 (en) * 2011-11-21 2013-05-30 Yazaki Corporation High voltage conductive wire and wire harness
EP2894732A1 (en) * 2012-09-03 2015-07-15 Yazaki Corporation Core wire insulating structure and insulating method
EP2894732A4 (en) * 2012-09-03 2016-04-27 Yazaki Corp Core wire insulating structure and insulating method

Also Published As

Publication number Publication date
AU7234300A (en) 2001-07-05
JP2001189113A (en) 2001-07-10

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