CN114068073A - Cable, wind generating set and cable laying method - Google Patents

Cable, wind generating set and cable laying method Download PDF

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Publication number
CN114068073A
CN114068073A CN202010756784.6A CN202010756784A CN114068073A CN 114068073 A CN114068073 A CN 114068073A CN 202010756784 A CN202010756784 A CN 202010756784A CN 114068073 A CN114068073 A CN 114068073A
Authority
CN
China
Prior art keywords
cable
protective layer
insulating protective
conductor
electrical
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.)
Pending
Application number
CN202010756784.6A
Other languages
Chinese (zh)
Inventor
拜亮
王�锋
刘岩
薛英保
边智慧
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.)
Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
Original Assignee
Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
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 Beijing Goldwind Science and Creation Windpower Equipment Co Ltd filed Critical Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
Priority to CN202010756784.6A priority Critical patent/CN114068073A/en
Publication of CN114068073A publication Critical patent/CN114068073A/en
Pending legal-status Critical Current

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/80—Arrangement of components within nacelles or towers
    • F03D80/82—Arrangement of components within nacelles or towers of electrical components
    • F03D80/85—Cabling
    • 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
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/06—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention relates to a cable, a wind generating set and a laying method of the cable, wherein the cable comprises the following components: the conductor is integrally strip-shaped and is provided with an outer edge surface; the insulating protective layer is coated on the outer edge surface of the conductor and is connected with the conductor; and the connecting assembly is connected with the insulating protective layer and comprises a connecting cable extending along the length direction of the conductor, and the connecting cable is insulated from the conductor and at least partially exposed out of the insulating protective layer, so that the cable can be connected with an external member through the part of the connecting cable exposed out of the insulating protective layer. According to the cable, the wind generating set and the laying method of the cable provided by the embodiment of the invention, the cable can meet the electric energy transmission requirement of the wind generating set, the fixation is facilitated, and the cost and the construction working hour are saved.

Description

Cable, wind generating set and cable laying method
Technical Field
The invention relates to the technical field of wind power, in particular to a cable, a wind generating set and a cable laying method.
Background
With the development of the wind power industry, the single-machine capacity of the wind generating set is gradually increased, and therefore, the number of cables for transmitting electric energy is increased, which causes problems such as mutual abrasion among the cables. In this context, it is urged to create a medium voltage conduction scheme, where the converters are placed inside the nacelle, replacing the 690V transmission with for example a 35KV transmission, with a direct consequence of a reduction in the number of cables, in order to reduce the wear between them.
Along with the reduction of cable quantity, the weight and the length ratio increase of single cable receive its structural limitation, and the fixed mode that the cable was used commonly all adopts a plurality of holders for most position in the pylon fixed, utilizes the holder to bear the weight of cable, avoids the cable gliding, and the drawback of this kind of mode is for needing a plurality of holders, has improved cost and engineering man-hour.
Therefore, a new cable, a wind turbine generator system and a cable laying method are needed.
Disclosure of Invention
The embodiment of the invention provides a cable, a wind generating set and a cable laying method.
In one aspect, a cable is provided according to an embodiment of the present invention, including: the conductor is integrally strip-shaped and is provided with an outer edge surface; the insulating protective layer is coated on the outer edge surface of the conductor and is connected with the conductor; and the connecting assembly is connected with the insulating protective layer and comprises a connecting cable extending along the length direction of the conductor, and the connecting cable is insulated from the conductor and at least partially exposed out of the insulating protective layer, so that the cable can be connected with an external member through the part of the connecting cable exposed out of the insulating protective layer.
According to an aspect of the embodiment of the present invention, the number of the connecting cords is two or more, and the two or more connecting cords are spaced apart from each other on the insulating protective layer.
According to one aspect of the embodiment of the invention, in the length direction, each connecting cable extends along a straight track, and more than two connecting cables are arranged at intervals and uniformly in the circumferential direction of the electric conductor; or, in the length direction, each connecting cable extends along a spiral track, and more than two connecting cables are arranged at intervals and respectively surround the electric conductor.
According to one aspect of the embodiment of the invention, the connecting cable is at least partially embedded in the insulating protective layer and fixedly connected with the insulating protective layer; or the connecting cable is arranged on the outer wall surface of the insulating protection layer far away from the conductor and is fixedly connected with the insulating protection layer.
According to an aspect of the embodiment of the present invention, the cable further includes a semiconductor layer disposed to cover the electrical conductor and located between the electrical conductor and the insulating protective layer, and the insulating protective layer has a thickness greater than that of the semiconductor layer.
According to an aspect of an embodiment of the present invention, the connecting cord comprises one of a steel cord and a nylon cord; and/or, the insulating protective layer comprises a rubber layer; and/or the cross section of the insulating protective layer in the length direction is in a circular ring shape.
In another aspect, an embodiment of the present invention provides a wind turbine generator system, including: a tower having a receiving cavity; a nacelle provided on the tower; the electric cabinet group comprises a first electric cabinet and a second electric cabinet, the first electric cabinet is arranged in the engine room, and the second electric cabinet is arranged on the tower and is positioned in the accommodating cavity; in the cable, one end of the cable is electrically connected with the first electrical cabinet through the conductor and the other end of the cable is electrically connected with the second electrical cabinet, and the connecting cable is at least partially exposed on the insulating protective layer and the exposed part of the connecting cable is connected with the engine room, so that at least part of the cable is arranged in the accommodating cavity in a hanging manner.
According to another aspect of the embodiment of the invention, the connecting cable comprises a first section and a second section in the length direction, the first section is located on the tower, the second section is located on the cabin, the first section and the second section are separately arranged, and the first section is at least partially exposed out of the insulating protective layer and connected with the cabin.
According to another aspect of the embodiment of the invention, the wind generating set further comprises an adapter, the adapter comprises a connecting ring, a first connector and a second connector, one end of the first connector is connected to the connecting cable, the other end of the first connector is connected to the connecting ring, and one end of the second connector is connected to the connecting ring and the other end of the second connector is connected to the cabin.
According to another aspect of the embodiment of the invention, the adaptor further comprises a transition plate, a through hole is formed in the transition plate, the electric conductor passes through the transition plate through the through hole, and the first connecting piece is indirectly connected with the connecting cable through the transition plate.
According to another aspect of the embodiment of the invention, the wind generating set further comprises a saddle bracket and a plurality of cable clamps, the saddle bracket and the cable clamps are arranged in the accommodating cavity and are respectively connected with the tower, and the cable clamps are located between the saddle bracket and the second electrical cabinet and are arranged at intervals in the height direction of the tower; the cable is at least partially lapped on the saddle bracket, the cable clamp clamps and fixes the part of the cable between the saddle bracket and the second electrical cabinet, and the maximum distance between the saddle bracket and the second electrical cabinet is less than or equal to 4 m; and/or the number of the cable clamps is less than or equal to five.
In another aspect, a method for laying a cable is provided according to an embodiment of the present invention, including:
a cable providing step of providing the cable;
a pretreatment step, removing the insulating protective layer at a preset position of the cable so as to enable the connecting cable to be at least partially exposed out of the insulating protective layer;
and a connecting step, connecting the part of the connecting cable exposed on the insulating protective layer with an external member, so that the cable is at least partially suspended and the weight of the cable is carried by the connecting cable.
According to another aspect of the embodiment of the present invention, in the cable providing step, the number of cables provided is one, and before the connecting step, the laying method further includes:
cutting off the part of the connecting cable exposed on the insulating protective layer along the length direction so as to form a first section and a second section of the connecting cable;
the first segment is connected to an external member.
According to still another aspect of the embodiment of the present invention, in the cable providing step, the number of the cables provided is two;
the pretreatment step comprises the following steps:
respectively removing the insulating protective layers at the end parts of the two cables so that the conductors and the connecting cables of the two cables are at least partially exposed out of the respective insulating protective layers;
electrically connecting the conductors of the two cables to each other;
the connecting step comprises: and connecting the part of the connecting cable of at least one cable exposed out of the insulating protective layer with an external member.
According to the cable, the wind generating set and the laying method of the cable provided by the embodiment of the invention, the cable comprises the conductor, the insulation protective layer and the connecting assembly, the conductor is arranged to meet the transmission requirement of electric energy, and the insulation protective layer can protect the conductor. And the coupling assembling of corresponding setting is connected in insulating protective layer and includes the connecting cable that extends along the length direction of electric conductor to connecting cable and electric conductor insulation setting and at least part can expose in insulating protective layer, make the cable can expose in the partial and exterior member connection of insulating protective layer through the connecting cable, do benefit to fixed and bear the weight of cable through the connecting cable, make the cable can adopt the free setting of dangling of long distance and need not auxiliary fixing spare in the application environment, the setting of auxiliary fixing spare such as effectual reduction holder, practice thrift cost and engineering man-hour. And the conductor can be prevented from being deformed due to stress, and the cable is ensured to have good conductivity.
Drawings
Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of one embodiment of a wind turbine generator set of the present invention;
FIG. 2 is a schematic structural view of one embodiment of the cable of the present invention;
FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;
FIG. 4 is a cross-sectional view of another embodiment of a cable of the present invention;
FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;
FIG. 6 is a schematic view of the position of the connective cord and electrical conductor of yet another embodiment of the cable of the present invention;
FIG. 7 is a longitudinal cut-away view of yet another embodiment of a cable of the present invention;
FIG. 8 is a cross-sectional view of yet another embodiment of a cable of the present invention;
FIG. 9 is a partial block diagram of another embodiment of a wind turbine generator set of the present invention;
FIG. 10 is a partial block diagram of yet another embodiment of a wind turbine generator set of the present invention;
fig. 11 is a schematic flow chart of a cable laying method of the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
100-a cable; 31 a-first section; 31 b-a second segment;
10-an electrical conductor; 10 a-the outer edge surface; 20-an insulating protective layer; 30-a connecting assembly; 31-a connecting cable; 40-a semiconductor layer;
200-a tower; 210-a receiving cavity;
300-a nacelle;
410-a first electrical cabinet; 420-a second electrical cabinet;
500-an adaptor; 510-a connecting ring; 520-a first connector; 530-a second connector; 540-transition plate;
600-saddle bracket; 700-cable clamp; 800-a generator; 900-impeller; 910-a hub; 920-blade.
X-length direction; y-circumferential direction.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The following description is given with the directional terms as they are shown in the drawings, and is not intended to limit the specific structure of the cable, the wind turbine generator system, and the cable laying method according to the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
For a better understanding of the present invention, a cable, a wind turbine generator set and a method of laying a cable according to embodiments of the present invention will be described in detail below with reference to fig. 1 to 11.
In one aspect, the present invention provides a wind turbine generator set, which may include a wind turbine foundation, a tower 200, a nacelle 300, a generator 800, and an impeller 900. The tower 200 has a receiving cavity 210 and is connected to a wind turbine foundation, the nacelle 300 is disposed on the tower 200, and the generator 800 is disposed on the nacelle 300. In some examples, the generator 800 may be located outside of the nacelle 300, although in some embodiments, the generator 800 may also be located inside of the nacelle 300. The impeller 900 includes a hub 910 and a plurality of blades 920 coupled to the hub 910, and the impeller 900 is coupled to the rotor of the generator 800 through the hub 910 thereof. When wind power acts on the blades 920, the whole impeller 900 and the rotor of the generator 800 are driven to rotate, and the power generation requirement of the wind generating set is further met.
Optionally, the wind generating set further comprises an electrical cabinet set and a cable 100, which can be used for transmitting the electrical energy converted by the generator 400. The electrical cabinet set includes a first electrical cabinet 410 and a second electrical cabinet 420. A first electrical cabinet 410 is disposed at nacelle 300, and a second electrical cabinet 420 is disposed at tower 200 and at receiving cavity 210. One end of cable 100 is electrically connected to first electrical cabinet 410 and the other end is electrically connected to second electrical cabinet 420.
The first electrical cabinet 410 can receive the electrical energy converted by the generator 400 and transmit the electrical energy to the second electrical cabinet 420 through the cable 100, and the second electrical cabinet 420 can transmit the electrical energy to other energy storage devices or electrical equipment.
The existing cable structure often needs a plurality of clamping members for fixing due to structural limitations, taking a tower 200 with a height of 100m as an example, in order to ensure the fixing of the cable, the clamping members need to be distributed on the wall of the tower with a height of approximately 80m, which accounts for about four fifths of the length of the whole cable. This requires at least forty or more clamps, which increases the cost and labor hours. In addition, the risk of uneven stress of the cable exists, so that the conductor inside the cable is locally stretched under the action of the gravity of the cable, the cross section of the conductor is changed, the resistance of the conductor is changed, and the conductivity is reduced. Which is not beneficial to the transmission of the electric energy converted by the generator.
Therefore, in order to solve the above technical problem, the embodiment of the present invention further provides a novel cable 100, and the cable 100 may be produced and sold separately as an independent component, and of course, may also be used in a wind turbine generator system and be a component of the wind turbine generator system.
Referring to fig. 2 and 3, a cable 100 according to another aspect of the present invention includes a conductive body 10, an insulating protective layer 20, and a connecting member 30. The conductor 10 is strip-shaped and has an outer edge surface 10a, and the insulating protective layer 20 covers the outer edge surface 10a of the conductor 10 and is connected to the conductor 10. The connecting assembly 30 is connected to the insulating protection layer 20, the connecting assembly 30 includes a connecting cable 31 extending along the length direction X of the conductive body 10, and the connecting cable 31 is insulated from the conductive body 10 and at least partially exposed from the insulating protection layer 20, so that the cable 100 can be connected to an external member through the portion of the connecting cable 31 exposed from the insulating protection layer 20.
According to the cable 100 provided by the embodiment of the invention, the conductive body 10 can meet the transmission requirement of electric energy, and the insulating protective layer 20 can protect the conductive body 10, so that the safety performance of the cable 100 is ensured. When cable 100 is applied to a wind turbine generator set, cable 100 may be electrically connected to first electrical cabinet 410 through one end of electrical conductor 10 and electrically connected to second electrical cabinet 420 through the other end. The connecting cable 31 is at least partially exposed from the insulation protection layer 20, and the exposed part is connected with an external component such as the nacelle 300, so that the fixing is facilitated. Because the weight of the cable 100 can be borne by the connecting cable 31, the cable 100 can be freely suspended in the accommodating cavity 210 of the tower 200 for a long distance, for example, the cable 100 can be freely suspended at least from the position connected with the nacelle 300 to the position extending to the distance of at least two thirds of the cable 100 along the length direction X, and is fixed without auxiliary fixing parts such as clamping parts, the arrangement of the auxiliary fixing parts such as the clamping parts is effectively reduced, the cost and the construction time are saved, the stress deformation of the electric conductor 10 can be avoided, and the cable 100 is ensured to have good electric conductivity.
In some alternative embodiments, the cross section of the electrical conductor 10 in the length direction X may be a regular geometric shape, such as a circle, a waist circle, an ellipse, and the like, and for better understanding of the cable 100 provided by the embodiments of the present invention, the electrical conductor 10 is illustrated as a circle in the following.
Optionally, the insulating protection layer 20 covers the outer edge surface 10a of the electrical conductor 10, and may be directly connected to the electrical conductor 10, or may be indirectly connected to the electrical conductor 10, for example, another layer structure may be provided between the electrical conductor 10 and the insulating protection layer 20. The insulating protective layer 20 may comprise a rubber layer, and has good protective performance, low cost and easy molding.
In some alternative embodiments, the insulating protective layer 20 has a circular cross section in the length direction X, which is easy to shape and facilitates the protection of the conductive body 10.
Optionally, the connecting cable 31 included in the connecting assembly 30 may be a steel cable, which has high bearing capacity and low cost, and can be deformed under the action of external force, so that the cable 100 can be easily connected to an external member through the connecting cable 31. Of course, the steel wire rope is used as the connecting cable 31 in an alternative embodiment, and it may also be a nylon rope, as long as it can satisfy the connection fixing with the insulating protective layer 20 and make the cable 100 satisfy the connection with the external member to bear the weight requirement of the cable 100.
As an alternative implementation manner, in the cable 100 according to the embodiment of the present invention, the number of the connecting cables 31 included in the connecting assembly 30 may be one, and of course, may be two or more. In the case of two or more, two or more connecting wires 31 are provided on the insulating protective layer 20 at intervals. Through the arrangement, the connecting cables 31 of the cable 100 are partially exposed out of the insulating protection layer 20, the exposed parts of the connecting cables 31 are connected with an external component, on the basis of meeting the connection requirement, the stress of the cable 100 can be more uniform, the risk of deformation of the internal conductor 10 of the cable 100 after the cable 100 is connected with the external component is reduced, and the conductivity of the cable 100 after the cable 100 is connected with the external component is ensured.
Optionally, when the number of the connecting cables 31 included in the connecting assembly 30 is more than two, the number of the connecting cables 31 may be two, or may be three or more, and the number of the connecting cables may be specifically set according to parameters such as the cross-sectional size of the cable 100 and the carrying capacity of the connecting cables 31.
Referring to fig. 4 and 5, as an alternative embodiment, in the cable 100 according to an embodiment of the present invention, each of the connection cables 31 may extend along a straight track in the length direction X, and two or more connection cables 31 are spaced and uniformly arranged in the circumferential direction Y of the electrical conductor 10. That is, the included angle between two adjacent connecting cables 31 may be the same. Through the arrangement, when the cable 100 is connected with an external component, the connection requirement can be met, the cable 100 is uniformly stressed, the stress deformation of the electric conductor 10 is avoided, and the electric conductivity of the electric conductor is optimized.
Optionally, each connecting cable 31 may be at least partially embedded in the insulating protective layer 20 and fixedly connected to the insulating protective layer 20, by the above arrangement, the insulating protective layer 20 may directly place the connecting cable 31 in a mold for molding the insulating protective layer 20 according to a predetermined position during molding, and after the insulating protective layer 20 is cured and molded, each connecting cable 31 may be at least partially fixed to the inside of the insulating protective layer 20, so as to ensure the connection strength between the connecting cable 31 and the insulating protective layer 20, and facilitate the connection therebetween.
As an alternative embodiment, the cable 100 provided by the present invention further includes a semiconductor layer 40, where the semiconductor layer 40 is disposed to cover the electrical conductor 10 and located between the electrical conductor 10 and the insulating protection layer 20. By providing semiconductor layer 40 and covering conductor 10, electromagnetic radiation from conductor 10 can be attenuated, and the safety of cable 100 can be ensured.
Optionally, the thickness of the insulating protection layer 20 is greater than the thickness of the semiconductor layer 40. On the basis of ensuring the attenuation of electromagnetic radiation of the electrical conductor 10, the cross-sectional dimension of the cable 100 in the length direction X can be reduced, and the embedded installation between the connecting cable 31 and the insulating protective layer 20 can be facilitated.
The cable 100 provided in the above embodiments of the present invention is exemplified by the case that each connecting cable 31 extends along a straight track in the length direction X, and it should be understood that this is an alternative embodiment, but is not limited to the above.
As shown in fig. 6 and 7, each of the connection cords 31 may extend along a spiral track in the longitudinal direction X, and two or more connection cords 31 may be provided around the conductive body 10 at intervals. With the above arrangement, each connecting cable 31 can be connected with the insulating protection layer 20 at least partially in an embedded fixing manner. Each connecting cable 31 extends along a spiral track and is arranged around the electric conductor 10, so that the contact area between the connecting cable 31 and the insulating protection layer 20 can be increased, and the connection strength between the connecting cable 31 and the insulating protection layer 20 is ensured. And when the connecting cable 31 is connected with an external member, the stress on each part of the insulating protection layer 20 can be uniform, the risk of deformation of the electric conductor 10 is reduced, and the cable 100 is ensured to have good electric conductivity.
In the above embodiments of the present invention, the connection cord 31 is at least partially embedded in the insulating protection layer 20 and is fixedly connected to the insulating protection layer 20. It is to be understood that this is an alternative embodiment, but is not limited to the above. As shown in fig. 8, in some embodiments, the connection cable 31 may be disposed on the outer wall surface of the insulation protection layer 20 away from the conductive body 10 and fixedly connected to the insulation protection body 20. With the above arrangement, the fixing requirements for the connection between the connecting cord 31 and the insulating protective layer 20 can be satisfied as well, so that the cable 100 can be connected to an external member through the connecting cord 31.
Alternatively, the connecting cable may be connected to the outer wall surface of the conductive body 10 by means of bonding.
According to the cable 100 provided by the embodiment of the invention, because the cable comprises the conductor 10, the insulating protection layer 20 and the connecting assembly 30, the conductor 10 can meet the transmission requirement of electric energy, and the insulating protection layer 20 can protect the conductor 10. The correspondingly arranged connecting assembly 30 is connected to the insulating protection layer 20 and includes a connecting cable 31 extending along the length direction X of the conductive body 10, and the connecting cable 31 is arranged in an insulating manner with the conductive body 10 and at least partially exposed from the insulating protection layer 20, so that the cable 100 can be connected to an external member through the portion of the connecting cable 31 exposed from the insulating protection layer 20, which is beneficial to fixing. When the cable 100 is arranged in a suspended mode, the weight of the cable 100 can be borne through the connecting cable 31, the arrangement of auxiliary fixing pieces such as clamping pieces is effectively reduced, and cost and construction time are saved. And the deformation of the conductor 10 due to stress can be avoided, and the cable 100 is ensured to have good conductivity.
The cable 100 provided by the embodiment of the invention, when applied to a wind generating set and used as a component of the wind generating set, the portion of the connecting cable 31 for connecting with the nacelle 300 may be a portion exposed when the cable 100 is molded, or may be a portion exposed and used for connecting with the nacelle 300 by peeling off the insulating protection layer 20 of the corresponding area when the connecting cable 31 needs to be connected with the nacelle 300.
Optionally, when the connecting cable 31 is connected to the nacelle 300, the connecting cable may be directly welded and fixedly bound, or may be indirectly connected to another adapter 500, and may be connected to a nacelle base of the nacelle 300, or may be connected to a platform corresponding to the nacelle 300.
Referring to fig. 9, as an alternative embodiment, when the wind turbine generator system provided by the present invention includes the cable 100 provided in each of the above embodiments, the wind turbine generator system may further include an adapter 500, and the cable 100 is indirectly connected to the nacelle 300 through the adapter 500, so as to facilitate connection and installation between the cable 100 and the nacelle 300.
Alternatively, the adaptor 500 may include a connection ring 510, a first connector 520 and a second connector 530, the first connector 520 having one end connected to the connection cable 31 and the other end connected to the connection ring 510, and the second connector 530 having one end connected to the connection ring 510 and the other end connected to the nacelle 300. By adopting the above structural form, the adaptor 500 can ensure the connection strength between the connecting cable 31 and the nacelle 300, and at the same time, can reduce the size of the connecting cable 31 exposed on the insulating protective layer 20, reduce the peeling amount of the insulating protective layer 20, and improve the safety performance of the cable 100.
In some alternative embodiments, the first connecting member 520 may be a flexible member, for example, a cable-like member, such as a steel cable, a nylon cable, etc., may be used. The first connecting member 520 and the connecting cable 31 can be connected to each other by a butt-joint sleeve, and the second connecting member 530 can also be a cable-like member, such as a connecting rope, which can be selected from a steel cable, a nylon rope, and the like. Of course, the structure of the first connecting member 520 and the second connecting member 530 is only an alternative embodiment, but not limited to the above, as long as the connection requirement between the connecting cable 31 and the nacelle 300 can be satisfied.
Referring to fig. 10, in some alternative embodiments, the adaptor 500 further includes a transition plate 540, the transition plate 540 is provided with a through hole, the conductive object 10 passes through the transition plate 540 through the through hole, and the first connector 520 is indirectly connected to the connecting cable 31 through the transition plate 540. By providing the transition plate 540, the connection cord 31 may be directly connected to the transition plate 540, the connection cord 31 may be connected to one surface of the transition plate 540 in the length direction X, and the first connector 520 may be connected to the other surface of the transition plate 540 in the length direction X. At this time, the first connector 520 is not limited to a wire rope. It may also be a rigid member, which may be a semi-ring structure, and one of the two free ends is fixed to the transition plate 540 after passing through the connection ring 510. With the above arrangement, the connection requirement of the connecting cable 31 and the nacelle 300 can be satisfied as well. In addition, the transition plate 540 can also make the cable 100 stressed uniformly in a suspension state, so as to ensure good conductivity of the cable 100.
As an alternative embodiment, the connecting cable 31 includes a first section 31a and a second section 31b in the length direction X, the first section 31a is located at the tower 200, the second section 31b is located at the nacelle 300, the first section 31a and the second section 31b are separately disposed, and the first section 31a is at least partially exposed from the insulating protective layer 20 and connected to the nacelle 300. Through the arrangement, the connection between the first electrical cabinet 410 and the second electrical cabinet 420 can be satisfied, the transmission of electric energy is satisfied, and meanwhile, the cable 100 can be conveniently connected with the cabin 300.
Referring to fig. 1 to 10, optionally, the wind generating set further includes a saddle bracket 600 and a plurality of cable clamps 700, the saddle bracket 600 and the cable clamps 700 are disposed in the accommodating cavity 210 and respectively connected to the tower 200, the cable clamps 700 are disposed between the saddle bracket 600 and the second electrical cabinet 420 and spaced apart from each other in the height direction of the tower 200, the saddle bracket 600 can change the direction of the cable 100, and the cable clamps 700 can fix the portion of the cable 100 between the saddle bracket 600 and the second electrical cabinet 420, so as to prevent the connection yield between the cable 100 and the second electrical cabinet 420 from being affected by the shaking of the cable 100 at the connection end of the cable 100 and the second electrical cabinet 420.
Optionally, the maximum distance D between the saddle bracket 600 and the second electrical cabinet 420 is less than or equal to 4 m. On the basis of ensuring the requirement of stability of electrical connection between the cable 100 and the second electrical cabinet 420, the usage amount of the cable clamp 700 can be effectively reduced, and the cost and the construction time can be reduced. Optionally, the number of cable clamps 700 is less than or equal to five. Through the arrangement, the requirement on electrical connection between the cable 100 and the connecting end of the second electrical cabinet 420 can be met, and meanwhile, the cost and the construction time can be further reduced.
Also taking the length of the cable 100 as 100m as an example, the wind generating set adopting the cable 100 provided by the embodiment of the invention can be in a free suspension state for a long distance without affecting the electric conductor 10 because the cable 100 bears the self gravity of the cable 100 through the connecting cable 31. Moreover, when the wind generating set includes the saddle bracket 600 and the cable clamp 700, the two are disposed close to the second electrical cabinet 420, so as to ensure the reversing of the cable 100 and the stability of the electrical connection with the second electrical cabinet 420. The quantity of its cable clamp 700 can be selected to 3, for the cable 100 of the same length that existing wind generating set includes, the use amount of cable clamp 700 descends 92.5% and above, very big reduction the cost and the construction degree of difficulty, and saddle bracket 600 and cable clamp 700 more are close to ground setting, reduce the construction degree of difficulty, and can guarantee constructor's personal safety.
Therefore, the wind turbine generator system provided by the embodiment of the invention comprises the cable 100 provided by each embodiment, the cable 100 can be connected with the cabin 300 through the connecting cable 31 connected with the insulating protective layer 20, the connecting cable 31 bears the weight of the cable 100, the cable 100 can be in a suspension state for a long distance without being fixed, the cost and the construction labor hour can be greatly reduced on the basis of ensuring the electric energy transmission requirement, and the power generation benefit of the wind turbine generator system is improved.
Referring to fig. 1 to 11, in another aspect, the present invention provides a method for laying a cable 100, including:
s100, a cable 100 providing step of providing the cable 100 of each of the above embodiments;
s200, a pretreatment step, namely removing the insulating protective layer 20 at a preset position of the cable 100 so as to enable the connecting cable 31 to be at least partially exposed out of the insulating protective layer 20;
and S300, connecting the part of the connecting cable 31 exposed on the insulating protective layer 20 with an external member, so that the cable 100 is at least partially suspended and the weight of the cable 100 is borne by the connecting cable 31.
The method for laying the cable 100 according to the embodiments of the present invention can be used for laying the cable 100 according to the embodiments described above, and can be applied to a predetermined application environment, for example, a wind turbine generator system. By the laying method, the connection and fixation of the cable 100 in a preset use environment can be effectively guaranteed, the construction efficiency is improved, and the conductor 10 in the laid cable 100 is small in stress and cannot influence the conductivity of the conductor.
Alternatively, before the connecting step S300, an adaptor 500 connecting step may be included, including connecting the adaptor 500 on a portion of the connecting cord 31 exposed to the insulating protective layer 20, so that the connecting cord 31 is connected to the external member through the adaptor 500.
Optionally, the mentioned adaptor 500 has the same structural form as the mentioned adaptor 500 in the wind turbine generator system and the same connection and matching manner with each part of the cable 100, and thus, the description thereof is omitted. Also, the adaptor 500 may be assembled in advance, or may be assembled on site, and may be set as required, and when the adaptor 500 includes the transition plate 540, the cable 100 may be passed through the transition plate 540 and then connected to the connecting cable 31.
Alternatively, in step S100, the cable 100 may be provided in number of one, and in step S200, a portion of the insulating protective layer 20 may be removed at a position where the cable 100 is spaced apart from both end portions by a predetermined distance, so that a portion of the connecting cord 31 exposed to the insulating protective layer 20 is spaced apart from both end portions of the cable.
Meanwhile, before step S300, the laying method further includes:
a cutting step of cutting off the portion of the connecting cable 31 exposed to the insulating protective layer 20 in the longitudinal direction X to form a first segment 31a and a second segment 31b of the connecting cable 31;
the first segment 31a is connected with an external member.
With the above arrangement, the requirement for electrical connection between two devices to be electrically connected can be satisfied by one cable 100.
For example, when the cable 100 is used in a wind turbine generator system, the electrical connection requirement between the first electrical cabinet 410 and the second electrical cabinet 420 can be satisfied by one cable 100, and the first section 31a formed by disconnecting the connecting cable 31 is connected to the nacelle 300.
The first section 31a may be directly connected to the external member, and of course, the adaptor 500 may be connected to the first section 31a, and connected to the external member through the adaptor 500.
As an alternative implementation manner, in the laying method of the cable 100 provided in the embodiment of the present invention, in step S100, the number of the cables 100 provided may also be two.
Then, step S200 may include removing the insulating protective layers 20 at the ends of the two cables 100, respectively, so that the conductive bodies 10 of the two cables 100 and the connecting cables 31 are at least partially exposed to the respective insulating protective layers 20, and then electrically connecting the conductive bodies 10 of the two cables 100 to each other.
At this time, in step S200, a portion of the connection cord 31 of the at least one cable 100 exposed to the insulating protective layer 20 may be connected to an exterior member. It may be directly connected to an external member through the connection cord 31, and of course, may be connected to the external member through the adaptor 500 by connecting the adaptor 500 to a portion of the at least one cable 100 where the connection cord 31 is exposed to the insulation protection layer 20. With the above arrangement, it is also satisfactory that the cable 100 and the exterior member are connected and fixed by the connecting cable 31, and the weight of the cable 100 is supported by the connecting cable 31. Moreover, the whole body formed by the two cables 100 has two free ends, so that the requirement of electric energy transmission between two devices needing electric energy transmission can be met.
Optionally, the method for laying the cable 100 according to the embodiment of the present invention further includes an electrical connection step, where one free end of the cable 100 or the whole of the two cables in the length direction X is electrically connected to a device, such as the first electrical cabinet 410, and another free end of the cable 100 in the length direction X is electrically connected to another device, such as the second electrical cabinet 420. To ensure the transmission requirements of electrical energy between devices.
Alternatively, after the cable 100 is connected and fixed to an external member by the connecting cable 31, the insulation protective layer 20 may be sealed by an insulation seal at the peeled position to ensure the safety performance of the cable.
Optionally, the above embodiments of the present invention are exemplified by the application of the cable 100 to a wind turbine generator set, which is an optional use environment, but not limited to the above use environment, and it may also be used in other devices related to cable transmission, such as high voltage transmission and conversion, and the description is not repeated here.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (14)

1. A cable (100) comprising:
a conductor (10) which is strip-shaped as a whole and has an outer edge surface (10 a);
an insulating protective layer (20) that covers the outer edge surface (10a) of the conductor (10) and is connected to the conductor (10);
the connecting assembly (30) is connected to the insulating protective layer (20), the connecting assembly (30) comprises a connecting cable (31) extending along the length direction (X) of the conductor (10), the connecting cable (31) is arranged in an insulating mode with the conductor (10) and at least part of the connecting cable can be exposed out of the insulating protective layer (20), and therefore the cable (100) can be connected with an external component through the part, exposed out of the insulating protective layer (20), of the connecting cable (31).
2. The cable (100) according to claim 1, wherein the number of the connecting cords (31) is two or more, and the two or more connecting cords (31) are provided at a distance from each other on the insulating protective layer (20).
3. The cable (100) according to claim 2, wherein each of the connecting cords (31) extends along a linear trajectory in the longitudinal direction (X), and wherein more than two connecting cords (31) are arranged at intervals and uniformly in the circumferential direction (Y) of the conductor (10);
or, in the length direction (X), each connecting cable (31) extends along a spiral track, and more than two connecting cables (31) are arranged at intervals and respectively surround the electric conductor (10).
4. The cable (100) according to any one of claims 1 to 3, wherein the connecting cord (31) is at least partially embedded inside the insulating protective layer (20) and is fixedly connected to the insulating protective layer (20); or the connecting cable (31) is arranged on the outer wall surface of the insulating protection layer (20) far away from the conductor (10) and is fixedly connected with the insulating protection layer (20).
5. The cable (100) according to any one of claims 1 to 3, wherein the cable (100) further comprises a semiconducting layer (40), wherein the semiconducting layer (40) is disposed over the electrical conductor (10) and between the electrical conductor (10) and the insulating protective layer (20), and wherein the insulating protective layer (20) has a thickness greater than a thickness of the semiconducting layer (40).
6. The cable (100) of any of claims 1 to 3, wherein the connecting cord (31) comprises one of a steel cord and a nylon cord;
and/or the insulating protective layer (20) comprises a rubber layer;
and/or the cross section of the insulating protection layer (20) in the length direction (X) is in a circular ring shape.
7. A wind turbine generator set, comprising:
a tower (200) having a receiving cavity (210);
a nacelle (300) disposed at the tower (200);
an electrical cabinet group comprising a first electrical cabinet (410) and a second electrical cabinet (420), wherein the first electrical cabinet (410) is arranged in the nacelle (300), and the second electrical cabinet (420) is arranged in the tower (200) and located in the accommodating cavity (210);
the electrical cable (100) of any one of claims 1 to 6, the electrical cable (100) being electrically connected to the first electrical cabinet (410) by one end of the electrical conductor (10) and to the second electrical cabinet (420) by another end; the connecting cable (31) is at least partially exposed from the insulating protective layer (20) and the exposed part is connected with the cabin (300) so that the cable (100) is at least partially suspended in the accommodating cavity (210).
8. Wind park according to claim 7, wherein the connecting cable (31) comprises, in the length direction (X), a first section (31a) and a second section (31b), the first section (31a) being located at the tower (200) and the second section (31b) being located at the nacelle (300), the first section (31a) and the second section (31b) being arranged separately, the first section (31a) being at least partially exposed to the insulating protective layer (20) and being connected to the nacelle (300).
9. Wind park according to claim 7, further comprising an adapter (500), wherein the adapter (500) comprises a connection ring (510), a first connector (520) and a second connector (530), wherein the first connector (520) is connected at one end to the connection cable (31) and at the other end to the connection ring (510), and wherein the second connector (530) is connected at one end to the connection ring (510) and at the other end to the nacelle (300).
10. Wind park according to claim 9, wherein the adaptor (500) further comprises a transition plate (540), wherein the transition plate (540) is provided with a perforation, wherein the electrical conductor (10) passes through the transition plate (540) via the perforation, and wherein the first connector (520) is indirectly connected to the connecting cable (31) via the transition plate (540).
11. The wind power plant according to claim 7, further comprising a saddle bracket (600) and a plurality of cable clamps (700), wherein the saddle bracket (600) and the cable clamps (700) are disposed in the accommodating cavity (210) and are respectively connected to the tower (200), the cable clamps (700) are disposed between the saddle bracket (600) and the second electrical cabinet (420) and are spaced apart in a height direction of the tower (200), the cable (100) is at least partially overlapped with the saddle bracket (600), and the cable clamps (700) clamp and fix a portion of the cable (100) between the saddle bracket (600) and the second electrical cabinet (420);
the maximum distance between the saddle bracket (600) and the second electrical cabinet (420) is less than or equal to 4 m; and/or the number of the cable clamps (700) is less than or equal to five.
12. A method of laying an electrical cable (100), comprising:
a cable (100) providing step of providing a cable (100) according to any one of claims 1 to 6;
a pre-treatment step of removing the insulating protective layer (20) at a predetermined position of the cable (100) so as to expose the connecting cable (31) at least partially to the insulating protective layer (20);
and a connecting step of connecting the part of the connecting cable (31) exposed to the insulating protective layer (20) with an external member so that the cable (100) is at least partially suspended and the weight of the cable (100) is carried by the connecting cable (31).
13. The laying method of a cable (100) according to claim 12, wherein in said cable (100) providing step, a number of said cables (100) provided is one, and before said connecting step, said laying method further comprises:
a cutting step of cutting off the portion of the connecting cable (31) exposed to the insulating protective layer (20) along the length direction (X) so that the connecting cable (31) forms a first section (31a) and a second section (31 b);
connecting the first section (31a) with the outer member.
14. The laying method of a cable (100) according to claim 12, characterized in that in said cable (100) providing step, said cable (100) is provided in a number of two;
the pretreatment step comprises:
removing the insulation protection layer (20) at the end parts of the two cables (100) respectively so that the conductive bodies (10) and the connecting cables (31) of the two cables (100) are at least partially exposed to the respective insulation protection layer (20);
electrically connecting the electrical conductors (10) of the two electrical cables (100) to each other;
the connecting step includes: and connecting the part of the connecting cable (31) of at least one cable exposed to the insulating protective layer (20) with the external member.
CN202010756784.6A 2020-07-31 2020-07-31 Cable, wind generating set and cable laying method Pending CN114068073A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010756784.6A CN114068073A (en) 2020-07-31 2020-07-31 Cable, wind generating set and cable laying method

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Application Number Priority Date Filing Date Title
CN202010756784.6A CN114068073A (en) 2020-07-31 2020-07-31 Cable, wind generating set and cable laying method

Publications (1)

Publication Number Publication Date
CN114068073A true CN114068073A (en) 2022-02-18

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