EP0379853B1 - Elektrisches Kabel, bestimmt für Hochspannungen - Google Patents

Elektrisches Kabel, bestimmt für Hochspannungen Download PDF

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Publication number
EP0379853B1
EP0379853B1 EP89870218A EP89870218A EP0379853B1 EP 0379853 B1 EP0379853 B1 EP 0379853B1 EP 89870218 A EP89870218 A EP 89870218A EP 89870218 A EP89870218 A EP 89870218A EP 0379853 B1 EP0379853 B1 EP 0379853B1
Authority
EP
European Patent Office
Prior art keywords
cable
section
extrados
elements
fact
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
EP89870218A
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English (en)
French (fr)
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EP0379853A1 (de
Inventor
Michel Havaux
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.)
CABLERIES ET CORDERIES DU HAINAUT SA
Original Assignee
CABLERIES ET CORDERIES DU HAINAUT SA
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Publication date
Application filed by CABLERIES ET CORDERIES DU HAINAUT SA filed Critical CABLERIES ET CORDERIES DU HAINAUT SA
Publication of EP0379853A1 publication Critical patent/EP0379853A1/de
Application granted granted Critical
Publication of EP0379853B1 publication Critical patent/EP0379853B1/de
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
    • H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
    • H01B5/08—Several wires or the like stranded in the form of a rope
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
    • H01B5/08—Several wires or the like stranded in the form of a rope
    • H01B5/10—Several wires or the like stranded in the form of a rope stranded around a space, insulating material, or dissimilar conducting material
    • H01B5/102—Several wires or the like stranded in the form of a rope stranded around a space, insulating material, or dissimilar conducting material stranded around a high tensile strength core
    • H01B5/104—Several wires or the like stranded in the form of a rope stranded around a space, insulating material, or dissimilar conducting material stranded around a high tensile strength core composed of metallic wires, e.g. steel wires

Definitions

  • the present invention relates to a particular type of electrical cables intended for the transport of high voltage electrical energy in overhead lines.
  • the document DE-C-275 218 describes hollow conductors constituted by elements having a section generally affecting the shape of an S or a Z. However, this document does not precisely define any particular parameter relating to the structure of the cable.
  • the document FR-A-779 960 relates to a closed cable whose surface is perfectly smooth.
  • the present invention aims to provide an electrical cable of a new type intended for the transport of electrical energy under high voltage which does not have the drawbacks of smooth closed cables but which nevertheless combines the advantages of these. It is more particularly sought to provide a closed cable having a determined surface roughness in order to cause the variation in drag in a range of useful speeds, between approximately 12 m / s and 60 m / s.
  • an enclosed electrical cable intended for the transport of high voltage electrical energy in overhead lines, comprising at least one outer layer constituted by elements having a section generally affecting the shape of an S or d 'a Z helically wound on a core so as to overlap one another, characterized in that, in a sectional plane transverse to the cable, the transition edges between the essentially circular upper surface of the element of S or Z and the radial planes limiting said upper surface in said cutting plane are rounded by a radius of curvature whose ratio to the diameter of cable is between 1.10 ⁇ 2 and 6.10 ⁇ 2.
  • the closed cable according to the invention has a particularly reduced drag coefficient at certain wind speeds, in particular compared with conventional stranded cables and conventional closed cables.
  • the closed cable of the invention has a useful cross section greater than a conventional stranded cable.
  • the cable diameter will be reduced; therefore, the support structures such as pillars, foundations, etc. can be designed in a lighter and / or less resistant manner.
  • the closed cable of equal diameter will be able to transport higher electrical energy.
  • the outer belt formed by the Z-shaped wires which are strongly nested one inside the other, also prevents the oozing of grease placed between the interstices of the inner wires during their assembly.
  • the closed cable according to the invention has an external area which tends towards the smooth surface.
  • the noise produced by the Corona effect will be all the less high, especially since, due to the absence of deep valleys, dust is more easily eliminated by natural precipitation. Contamination over time will therefore be less than for a conventional stranded cable. For the same reasons, online losses will be reduced. The same is true of noise.
  • the enclosed cable according to the invention also provides a solution to the problems caused by frost and by the formation of ice sleeves around the conductors. Indeed, the formation of an ice sleeve around the cable causes it to twist. In order to avoid the resulting problems, it is possible to provide for the suspension of weight on the cable, which counteracts the torsional effect due to the formation of the ice sleeve.
  • the closed cable comprises at least two outer layers constituted by elements having a section generally affecting the shape of an S or a Z wound helically on a core so to nest into each other, one layer being rolled up to the left and the other to the right. Correct orientation of the layers of the cable with respect to the prevailing winds projecting snow onto the cable also prevents the formation of excessive torsional forces in the cable.
  • the two layers constituted by elements profiled in S or Z are separated by an interval of the order of 0.1 to 1 mm. It has been found that the closed cable thus obtained is less sensitive to small wind vibrations and can be mounted with less use of conventional shock absorbers or without using them.
  • the filiform element profiled in S or Z and characterized by radii of curvature between 0.4 and 1 mm between the upper surface and the radial planes limiting said upper surface in the cutting plane has diameters of upper surface included between 15 and 60 mm, and a profile height between 3 and 12 mm, the upper surface forming an arc of curvature between 10 ° and 30 °.
  • a closed cable 1 consists of a core 3 consisting of 7 stranded elements (1 + 6), a first layer 5 of elements 7 having an S or Z-shaped profile and a second layer 9 called outer layer comprising elements 11 having a section in the form of S or Z .
  • An annular space 13 can be provided between the essentially smooth outer surface of the first layer 5 of S or Z shaped elements 7 and the surface formed by the lower surfaces of the S or Z elements 11 of the outer layer 9.
  • Said profiled elements in S or Z are wound helically around the core 3 and are nested one inside the other so as to constitute a seal that is tight against the grease contained inside and outside dirt.
  • the elements 7 constitute an essentially smooth external surface, apart from a few irregularities due in particular to manufacturing tolerances
  • the external surface constituted by the elements 11 wound helically on said first layer 5 and overlapping one another presents the appearance of an essentially smooth surface, provided with helical grooves 15 determined by the radii of curvature of the corresponding edges of the S or Z profile.
  • FIG 2 there is shown an element 11 in cross section on an enlarged scale.
  • the section generally has the shape of an S or a Z.
  • the transition edges 21 and 23 between the essentially circular upper surface 25 and the radial planes 27 and 29 limiting said upper surface in said plane cut are rounded by a radius e curvature 30 generally between 0.4 and 1 mm, in the case of cables having a diameter of 15 to 60 mm.
  • This graph more particularly shows the importance of the radius of curvature of the elements in S or Z.
  • the tests were carried out for cables each having an outside diameter of 18.9 mm.
  • the number of grooves, the pitch of the propeller, the fouling of the cable and possibly other parameters can influence the behavior of the cable. This is nevertheless significantly less important than the influence of the aforementioned parameters, namely the depth of the grooves and the diameter of the cable.
  • the cable according to the invention can be made of any type of material suitable for an overhead power line. It is also understood that the invention covers the various cables constituting an overhead line, in particular the phase or guard cables incorporating or not incorporating telecommunication circuits.
  • Figure 1 shows a stranded core (1 + 6), it should be noted that the invention also covers a cable as claimed, the core of which may include optical fibers.

Landscapes

  • Non-Insulated Conductors (AREA)
  • Communication Cables (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Insulated Conductors (AREA)
  • Suspension Of Electric Lines Or Cables (AREA)

Claims (5)

  1. Verschlossenes elektrisches Kabel, das für den Transport von elektrischer Energie unter Hochspannung über Freileitungen bestimmt ist, mit mindestens einer äußeren Schicht (11), die aus Elementen (13) besteht, die einen ungefähr S- oder Z-förmigen Querschnitt aufweisen und auf einen Kern (3) schraubenförmig so aufgewickelt sind, daß sie ineinandergreifen, dadurch gekennzeichnet, daß in einer zu dem Kabel transversalen Schnittebene die Übergangskanten (21, 23) zwischen der im wesentlichen kreisförmigen, äußeren Wölbfläche (25) des S- oder Z-förmigen Elements und den radialen Ebenen (27, 29), die die äußere wölbfläche in dieser Schnittebene begrenzen, mit einem Krümmungsradius (30) verrundet sind, dessen Verhältnis zu dem Durchmesser des fertigen Kabels zwischen 1.10⁻² und 6.10⁻² liegt.
  2. Verschlossenes elektrisches Kabel gemäß Anspruch 1, dadurch gekennzeichnet, daß es zwei Schichten (5, 9) aufweist, die aus Elementen mit einem S- oder Z-förmigen Querschnitt bestehen.
  3. Verschlossenes elektrisches Kabel gemäß irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine der Schichten, die aus Elementen besteht, die einen S- oder Z-förmigem Querschnitt aufweisen und schraubenförmig so aufgewickelt sind, daß sie ineinandergreifen, rechtsgängig aufgewickelt ist, und daß die andere Schicht linksgängig aufgewickelt ist.
  4. Verschlossenes elektrisches Kabel gemäß Anspruch 2 oder 3, dadurch gekennzeichnet, daß die aus S- oder Z-förmigen Profilelementen bestehenden Schichten durch einen Zwischenraum (13) von ungefähr 0,1 bis 1 mm voneinander getrennt sind.
  5. Fadenförmiges Element, das einen ungefähr S- oder Z-förmigen Querschnitt aufweist, dadurch gekennzeichnet, daß in einer transversalen Schnittebene die Übergangskanten (21, 23) zwischen der im wesentlichen kreisförmigen, äußeren Wölbfläche (25) und den radialen Ebenen (27, 29), die die äußere Wölbfläche in der Schnittebene begrenzen, mit einem Krümmungsradius (30) verrundet sind, dessen Verhältnis zu dem Durchmesser der äußeren Wölbfläche zwischen 1.10⁻² und 6.10⁻² liegt, wobei die Höhe des S- oder Z-förmigen Profils zwischen 3 mm und 12 mm liegt, und die äußere Wölbfläche einen Kreisbogen mit einem Bogenwinkel zwischen 10° und 30° bildet.
EP89870218A 1989-01-26 1989-12-27 Elektrisches Kabel, bestimmt für Hochspannungen Expired - Lifetime EP0379853B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8900084 1989-01-26
BE8900084A BE1002786A4 (fr) 1989-01-26 1989-01-26 Cable electrique destine aux hautes tensions.

Publications (2)

Publication Number Publication Date
EP0379853A1 EP0379853A1 (de) 1990-08-01
EP0379853B1 true EP0379853B1 (de) 1994-05-18

Family

ID=3883980

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89870218A Expired - Lifetime EP0379853B1 (de) 1989-01-26 1989-12-27 Elektrisches Kabel, bestimmt für Hochspannungen

Country Status (4)

Country Link
EP (1) EP0379853B1 (de)
AT (1) ATE105965T1 (de)
BE (1) BE1002786A4 (de)
DE (1) DE68915425D1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10352965A1 (de) * 2003-11-13 2005-06-09 Nexans Elektrisches Kabel zur Verwendung als Wicklungsstrang für Linearmotoren
CN104123990A (zh) * 2014-08-08 2014-10-29 江苏亨通电力电缆有限公司 6kV到35kV铝合金导体交联聚乙烯绝缘电力电缆
CN106057289A (zh) * 2014-12-29 2016-10-26 江苏亨通电力特种导线有限公司 高压输电线路用节能型架空导线

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101847464A (zh) * 2010-04-22 2010-09-29 江苏通光强能输电线科技有限公司 由圆线支撑型线扩径的低电晕导线
EP2639797B1 (de) 2012-03-12 2018-04-04 Nexans Elektrisches Übertragungskabel, insbesondere für Freileitung
CN110570992B (zh) * 2019-09-11 2021-08-10 金杯电工股份有限公司 一种磁浮轨道交通长定子电缆的生产工艺
CN110491556B (zh) * 2019-09-11 2021-08-10 金杯电工股份有限公司 一种磁悬浮轨道交通用长定子绕组电缆

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE275218C (de) * 1913-05-16 1914-06-11
FR779960A (fr) * 1934-01-06 1935-04-17 Trefilerie Et Cablerie De Bour Câble conducteur pour lignes aériennes à tension moyenne
NL136812C (de) * 1966-12-30

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10352965A1 (de) * 2003-11-13 2005-06-09 Nexans Elektrisches Kabel zur Verwendung als Wicklungsstrang für Linearmotoren
CN104123990A (zh) * 2014-08-08 2014-10-29 江苏亨通电力电缆有限公司 6kV到35kV铝合金导体交联聚乙烯绝缘电力电缆
CN106057289A (zh) * 2014-12-29 2016-10-26 江苏亨通电力特种导线有限公司 高压输电线路用节能型架空导线
CN106057289B (zh) * 2014-12-29 2018-06-15 江苏亨通电力特种导线有限公司 高压输电线路用节能型架空导线

Also Published As

Publication number Publication date
ATE105965T1 (de) 1994-06-15
EP0379853A1 (de) 1990-08-01
BE1002786A4 (fr) 1991-06-11
DE68915425D1 (de) 1994-06-23

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