KR101620894B1 - Multi-segmental Conductor And Electric Power Cable Having The Same - Google Patents

Multi-segmental Conductor And Electric Power Cable Having The Same Download PDF

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Publication number
KR101620894B1
KR101620894B1 KR1020150118961A KR20150118961A KR101620894B1 KR 101620894 B1 KR101620894 B1 KR 101620894B1 KR 1020150118961 A KR1020150118961 A KR 1020150118961A KR 20150118961 A KR20150118961 A KR 20150118961A KR 101620894 B1 KR101620894 B1 KR 101620894B1
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KR
South Korea
Prior art keywords
center
layer
segment
wires
wire
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KR1020150118961A
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Korean (ko)
Inventor
최수걸
문병철
이장근
송기영
이정기
김정식
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일진전기 주식회사
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Priority to KR1020150118961A priority Critical patent/KR101620894B1/en
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Publication of KR101620894B1 publication Critical patent/KR101620894B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H01B7/0241—Disposition of insulation comprising one or more helical wrapped layers of insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/02—Stranding-up
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/08—Insulating conductors or cables by winding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H01B7/0208—Cables with several layers of insulating material
    • H01B7/0225—Three or more layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/06—Extensible conductors or cables, e.g. self-coiling cords
    • H01B7/065—Extensible conductors or cables, e.g. self-coiling cords having the shape of an helix
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables

Abstract

The objective of the present invention is to provide an array method of wires used for multi-segmental conductors to minimize the induced voltage. The multi-segmental conductor is arranged at the center of a power cable to transmit power. The multi-segmental conductor comprises: a center segment having multiple wires arranged circularly; and at least one external segment forming multi-layered fan-shape elements, combined to multiple bare conductor wires and insulation coating wires, and arranged radially while being attached on the outer surface of the center segment. The center segment includes a first center wire and first external wires arranged at the outside of the first center wire. The external segments are arranged spirally around the center segment, and include second center wires and second external wires arranged spirally, forming the ′n′ number of layers on the outer surface of the second center wires. The second center wires, a first layer, a second layer, and second external wires of the (2m+2) number of layers are made of insulation coating wires. Also, the second external wires of the (2m+1) number of layers are made of bare conductor wires and insulation coating wires arranged alternately.

Description

TECHNICAL FIELD [0001] The present invention relates to a multi-segment conductor and a power cable having the multi-

Embodiments of the present invention relate to a multi-segment conductor disposed at the center of a power cable to transmit power and a power cable having the same.

In order to respond to the increase of electric power demand, the outer diameter of the conductor of the power cable is gradually increasing.

However, a large diameter conductor having such an outer diameter of the conductor has AC (Alternating Current) loss due to a skin effect. That is, AC resistance is increased due to the surface effect, and consequently, the increase of the transmission capacity is limited. In order to reduce such AC current loss, a multi-segment conductor such as a Milliken-type conductor, for example, has been developed.

A center conductor formed of a fan-shaped outer segment consisting of three to six segments and a circular center segment formed by joining a wire to the center is formed at the center of the power cable.

An inner semiconductive layer is disposed on the outer circumferential surface of the central conductor, an insulating layer is coated on the outer circumferential surface of the inner semiconductive layer, and the insulating layer is again coated with the outer semiconductive layer. The outer semiconductive layer is again surrounded by a metal shielding layer made of lead or aluminum, and an outer sheath layer is formed outside the metal shielding layer.

In order to compensate for the loss due to the skin effect in the case of such multi-segment conductors, a plurality of element wires constituting the multiple segments are insulated from each other to maximize the effect, so that all of the element wires are insulated.

However, when all the wires of the segments constituting the conductor are filled with the insulated coating wire, the conductor and the inner semiconductive layer surrounding the conductor are insulated to generate an induced voltage, and the reverse current There is a risk that the outermost insulation coating layer may be damaged during the fabrication of the stranded wire structure, thereby breaking down the wire insulation structure. Therefore, it is necessary to study the arrangement and arrangement of wire rods that can minimize such induced voltage and maintain a wire insulation structure.

In addition, since the insulated coating wire is formed by coating an insulating film on the insulated wire itself, there is a problem that the cost due to coating of the insulating film per wire is increased.

In order to solve the problems of the conventional art as described above, the present invention proposes a method of arranging wire rods constituting a multi-segment conductor for minimizing an induced voltage.

In addition, we propose a method of arranging wire rods constituting a multi-segment conductor, which can reduce the cost of covering coatings per conductor wire by appropriately adjusting the number of insulated coating wires.

Other objects of the invention will be apparent to those skilled in the art from the following examples.

According to a preferred embodiment of the present invention, there is provided a multi-segment conductor disposed at a central portion of a power cable for transmitting electric power, comprising: a center segment having a plurality of wire segments formed in a circular shape; And at least one outer segment that is disposed radially in contact with the outer periphery of the center segment and is joined to a plurality of nodular strands and a plurality of insulating coating strands to form a multi-layered fan-shaped element, And the outer contour segments are arranged in a spiral twist around the center segment, the outer contour segments being arranged in a circumferential direction of the second center strand, And second outer circumferential strands forming a layer layer of n (n is a positive integer) on the outer circumferential surface of the second center strand and twisted in a spiral shape, wherein the second center strand, the first layer strand, Layer strands and (2m + 2) -th layer layers (m is a positive integer) are all formed of insulated coating element wires, and the second outer conductor strands of the (2m + 1) Kwak wires are insulated coated wire and the I multi-segmented conductor made of a wire member arranged alternately.

The first center strand and the first outer strands of the center segment may be insulated coating wires.

The insulated coating wire may be manufactured by applying an insulating film having a predetermined thickness to the body wire, and the insulating film may be formed of at least one layer.

An insulating film may be disposed between the center segment and the outer segment and between the outer segments, respectively

By applying the multi-segment conductor in which the insulated coating wire according to the present invention and the conductor wire are perfectly arranged, the induced voltage induced in the wire insulation layer can be minimized.

1 is a cross-sectional view of a power cable having a multi-segment conductor according to an embodiment of the present invention.
2 is a cross-sectional view of a multi-segment conductor according to an embodiment of the present invention.
3 is a diagram illustrating an outer segment according to an embodiment of the present invention.
Fig. 4 (a) is a view showing a current density history in a center conductor composed of only a solid wire, and Fig. 4 (b) is a diagram showing a current density history in a center conductor composed of an insulating coated wire.

The details of other embodiments are included in the detailed description and drawings.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a cross-sectional view of a power cable having a multi-segment conductor according to an embodiment of the present invention.

1, a power cable according to the present invention includes a center conductor 10 of a multi-segment type, an inner semiconductive layer 20 which is sequentially disposed on the outer periphery of the central conductor 10, an insulating layer 30, A conductive layer 40, a semi-conductive cushion layer 50, a metal shielding layer or metal sheath 60, and a sheath 70.

The center conductor 10 is a passage through which electricity flows, and serves to supply a current supplied from a substation to an electric power machine or the like. The center conductor 10 is made of a multi-segment conductor of a Milliken type of split conductors to minimize power loss due to the skin effect.

The inner semiconductive layer 20 improves the insulation stability by making the influence of the electric field uniform, thereby preventing the heat generated during the current supply from being transmitted to the outside. The inner semiconductive layer 20 is made of a semiconductive compound such as, for example, semiconductive polyethylene or the like, and co-extruded together with an insulating layer 30 made of crosslinked polyethylene (XPLE: Cross Linking Polyethylene).

The outer semiconductive layer 40 is made of semiconducting polyethylene in the same manner as the inner semiconductive layer 20.

The anti-conduction cushion layer 50 serves to prevent the metal shield layer 60 from being pressed and to protect the internal core when the insulation is expanded.

The metal shield layer or metal sheath layer 60 forms a path of unexpected currents due to weak current and insulation failure when a voltage is applied to the insulating layer 30.

The sheath 70 is made of a polymer material and serves to protect the cable and the metal shielding layer or the metal sheath layer.

FIG. 2 illustrates an example of a multi-segment conductor according to an embodiment of the present invention, and FIG. 3 illustrates an outer segment according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the center conductor 10 includes a center segment 110 positioned at the center and outer segments 121 through 126 radially disposed at the periphery of the center segment 110. In the present invention, six outline segments are shown, but the number of outline segments is not limited thereto and may be appropriately selected. The center segment 110 and the outer segments 121 to 126 are electrically isolated from each other by the inter-segment insulating films 131 to 137. The inter-segment insulating films 131 to 137 are electrically insulative as swellable tapes such as kraft paper.

The outer segments 121 to 126 are spirally twisted about the center segment 110 with a constant pitch.

When the outer segments 121 to 126 are formed by only the stranded wire 3, the AC resistance is increased by increasing the skin effect coefficient. When the outer coated segments 121 to 126 are composed of only the insulated coating wire 1, There is a problem in that an induced voltage is induced between the inner semiconductive layer 10 and the inner semiconductive layer 20, resulting in a loss of current due to formation of an inverse electric field. Therefore, it is preferable to arrange the element wires constituting the segments by appropriately intermingling the insulated coating wire element 1 and the strand wire element 3.

The center segment 110 of the present invention has a shape in which a plurality of insulated coating wires 1 are formed in a circular shape and includes a first center core wire 111 and six wires arranged outside the first center core wire 111 1 outer circumferential line 113. [

3, the outer segments form n (n is a positive integer) layer layers 221 to 225 on the outer circumferential surfaces of the second central core wire 211 and the second central core wire 211, respectively, And second outer circumferential wires arranged in a twisted manner. Although it is shown in FIG. 3 that five layer layers are formed, it is not limited thereto.

At this time, the strands of the second center core wire 211, the first layer 221, the second layer 222 and the (2m + 2) layer layer (where m is a positive integer) And the second outer conductor wires of the (2m + 1) layer layers 223 and 225 are composed of the insulated coating wire 1 and the conductor wire 3 alternately arranged.

In summary, in the multi-segment conductor of the present invention, the center segments 110 are entirely made of the insulated coating wire 1. The second center strand 211 constituting the outer segments 121 to 126 and the second outer strands of the first layer 221, the second layer 222 and the fourth layer 224, And the second outer conductor wires of the third layer layer and the fifth layer layers 223 and 225 are composed of the insulated coating wire 1 and the conductor wires 3 arranged alternately .

By constituting as described above, it is possible to maintain each of the element wires constituting the segment electrically insulated from each other, and while maintaining the coefficient of the skin effect substantially similar to that in the case where all the element wires of the segment are constituted by the insulating coating wire element, There is an advantage that the induced voltage can be minimized due to the construction of the insulated coating wire.

The second core strands 211 of the outer segment and the second outer strands of the first and second layer layers 221 and 222 of the center segment 110 are all covered with the insulating coating wire 1, Will be described with reference to FIG.

 Fig. 4 (a) is a view showing a current density history in a center conductor composed of only a solid wire, and Fig. 4 (b) is a diagram showing a current density history in a center conductor composed of an insulating coated wire.

Referring to FIG. 4 (a), it can be seen that the majority of the currents are concentrically distributed to the outside and inside due to the proximity effect and the skin effect.

Referring to FIG. 4 (b), when the center conductor is implemented with an insulated coating element wire, the distribution of electric currents can be changed to the distribution of the inner and outer segments between the outer segments, thereby increasing the current effect by about 10 to 13%.

In order to maintain the effect of increasing the current effect, the insulation between the wires must be secured. However, the inner portion of the center conductor is subjected to a great deal of pressure. If the first outer perimeter strands 113 of the center segment are composed of alternatingly arranged insulating coated strands and / or stranded strands, There is a possibility that the individual insulation quality of the battery is deteriorated.

Accordingly, in the present invention, since all of the core wires of the central conductor to which high pressure is applied are formed of insulating coating wires, it is possible to prevent deterioration of insulation quality due to pressure, thereby maximizing the current increasing effect.

In addition, when all of the strands of the segment constituting the conductor are filled with the insulated coating element wire, an induced voltage is generated between the conductor and the inner semiconductive layer surrounding the conductor to cause loss of current due to the formation of the reverse electric field. There is a risk that the insulating coating layer may be damaged.

Therefore, in the case of the outer segment, it is necessary to arrange the stranded wire and the insulated coating wire appropriately. However, referring to FIG. 4 (b), it can be seen that the current density of the center region A of the outer segments is high. Since the insulation quality may be deteriorated when the core wires of the central region A exhibiting a high current density are formed of alternating conductor wires and insulated coating wire wires arranged alternately in the present invention, The second core strands 211 and the outer strands of the first and second layer layers 221 and 222 are all formed of the insulated coating strand 1 so that the insulation quality is prevented from being lowered and the current increasing effect can be maximized do.

In the present invention, the insulated coating wire is manufactured by applying an insulating film having a constant thickness to the body wire, and the insulating film can be formed more than one layer. In this case, an interconnection line and a tin-plated interconnection line may be used as the conductor wire, and as the insulating coating constituting the insulating film, enamel, polyvinyl-formal resin, polyester, polyurethane, silicone, epoxy, Nylon, phenoxy, polyesterimide, polyamideimide, polyimide, polyhydantoin, polyhydantoin ester imide and the like can be used.

As described above, the present invention has been described with reference to particular embodiments, such as specific elements, and specific embodiments and drawings. However, it should be understood that the present invention is not limited to the above- And various modifications and changes may be made thereto by those skilled in the art to which the present invention pertains. Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

10: center conductor 20: semiconductive layer
30: insulating layer 40: outer semiconductive layer
50: Semi-conductive cushion layer 60: Metal shielding layer
70: Cis
110: center segment 121 to 126: outer segment
131 ~ 137: Insulation film

Claims (5)

A multi-segment conductor disposed at the center of the power cable for transmitting power,
A center segment in which a plurality of wires are circular;
At least one outer segment formed radially in contact with the outer periphery of the central segment and having a plurality of nano-conductor wires and a plurality of insulating coating wires joined to form a multi-layered fan-shaped element,
Wherein the center segment includes a first center strand and first outer strands disposed outside the first center strand,
Wherein the outer segments are helically twisted about the center segment,
Wherein the outer segment includes second outer strands forming a layer layer of n (n is a positive integer) layer on the outer circumferential surface of the second central strand and the second central strand and twisted in a spiral shape, (2m + 1) -th layer and the second outer peripheries of the strand, the first layer, the second layer and the (2m + 2) -th layer (m is a positive integer) Surrounding wires are composed of alternately arranged insulated coating wire and wire,
Wherein the first central core wire and the first outer core wires of the center segment are made of insulated coated wire. delete The method according to claim 1,
Wherein the insulating coating element wire is manufactured by applying an insulating film having a constant thickness to the body wire, and the insulating film is composed of at least one layer. The method according to claim 1,
Wherein an insulation film is disposed between the center segment and the outer segment and between the outer segments, respectively. 1. A power cable comprising a multi-segment type center conductor,
The center conductor may include:
A center segment in which a plurality of insulating coating wires are circular;
At least one outer segment formed radially in contact with the outer periphery of the central segment and having a plurality of nano-conductor wires and a plurality of insulating coating wires joined to form a multi-layered fan-shaped element,
Wherein the center segment includes a first center strand and a first outer strand disposed outside the first center strand,
Wherein the outer segments are helically twisted about the center segment,
Wherein the outer segment includes second outer strands forming a layer layer of n (n is a positive integer) layer on the outer circumferential surface of the second central strand and the second central strand and twisted in a spiral shape, (2m + 1) -th layer and the second outer peripheries of the strand, the first layer, the second layer and the (2m + 2) -th layer (m is a positive integer) Surrounding wires are composed of alternately arranged insulated coating wire and wire,
Wherein the first central core wire and the first outer core wire of the center segment are insulated coating wires.
KR1020150118961A 2015-08-24 2015-08-24 Multi-segmental Conductor And Electric Power Cable Having The Same KR101620894B1 (en)

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Application Number Priority Date Filing Date Title
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014056714A (en) 2012-09-12 2014-03-27 Viscas Corp Element wire insulation segmentation conductor for power cable

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014056714A (en) 2012-09-12 2014-03-27 Viscas Corp Element wire insulation segmentation conductor for power cable

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