Large-diameter wind power generation energy storage cable

Abstract

The invention provides a large-diameter wind power generation energy storage cable, and relates to the technical field of cables, the large-diameter wind power generation energy storage cable comprises a cable body and a matching assembly, the cable body comprises a center reinforcing core, a plurality of dispersed conductor bundles, a conductor wrapping frame, a heat conduction net, a phase change heat conduction filler, an insulating layer, a shielding layer and a scattered outer sheath, the conductor wrapping frame comprises a core wrapping layer located in the center, a plurality of conductor wrapping layers located on the periphery of the core wrapping layer in a radial shape and a connecting belt connecting the core wrapping layer and the conductor wrapping layers. Through the structural design of the dispersed conductor bundle and the radial conductor wrapping frame, the rigid limitation of a traditional large-diameter cable integrated conductor is broken, the conductor structure is made to have higher flexibility, torsional stress is effectively dispersed, conductor strand breakage caused by stress concentration is avoided, the petal-shaped scattered flower outer sheath can achieve flexible switching between bundling and unfolding, and the cable has the advantages of being high in flexibility, high in flexibility and high in reliability. Laying and transportation in a narrow and small space are facilitated in the folded state, and the heat dissipation area and the protection range are increased in the unfolded state.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and in particular to a large-diameter wind power energy storage cable. Background Technology

[0002] As the global energy structure shifts towards clean energy, the large-scale construction of onshore wind farms, offshore wind farms, and integrated wind-solar-storage projects has become a trend. The capacity of single units is gradually being upgraded to larger power. Therefore, more stringent requirements are placed on the power carrying capacity of core components for power transmission, namely wind power energy storage cables. Due to their high current carrying capacity, large-diameter wind power energy storage cables have become core components that can be adapted to the entire power transmission chain of high-power wind turbines. Their reliability directly determines the operational stability and economic benefits of wind farms. However, existing large-diameter wind power energy storage cables, limited by structural design, material selection, and manufacturing processes, are difficult to adapt to the complex and harsh operating conditions of wind power energy storage scenarios (dynamic torsion, extreme temperature and humidity, marine salt spray corrosion, high current heat accumulation, and laying in confined spaces, etc.), and have many technical defects that urgently need to be solved, as follows: I. Poor mechanical performance adaptability and high risk of torsional and tensile fatigue failure. Existing large-diameter cables mostly adopt an integrated stranded conductor structure, which lacks flexibility and has a generally large bending radius. This makes them unsuitable for the narrow space required for laying cables at the connection between the wind turbine nacelle and the tower. More importantly, the rotation of the wind turbine blades during operation causes periodic torsion of the cable. Traditional cable structures are prone to stress concentration, resulting in a service life far below the design life of the wind turbine. Long-term use can easily lead to conductor strand breakage and insulation tearing, causing electrical faults. At the same time, the weight per meter of large-diameter cables is large, and the tensile strength of existing conductors is difficult to withstand when vertically suspended. First, the cable is prone to problems such as conductor stretching and deformation and loose joints when subjected to its own weight load. Second, the heat dissipation efficiency is low, and heat accumulation accelerates insulation aging. The heat dissipation area-volume ratio of large-diameter cables decreases significantly with the increase of diameter. Moreover, most existing products adopt a dense insulation-sheath structure and lack a dedicated heat dissipation design. In the high-current transmission scenario of wind power energy storage system, a large amount of heat generated by conductor loss and insulation loss cannot be dissipated quickly, causing the cable to operate at a temperature exceeding the design value for a long time. The thermal aging rate of the insulation layer is accelerated, the service life is greatly shortened, and in extreme cases, it may even cause insulation thermal breakdown, resulting in large-scale shutdown. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of this invention is to provide a large-diameter wind power energy storage cable that can solve the technical problems of insufficient torsional and tensile strength of the cable, which can easily lead to conductor strand breakage and insulation layer tearing after long-term use, causing electrical faults, as well as low heat dissipation efficiency, heat accumulation accelerating insulation aging, and resulting in a significant shortening of service life.

[0004] This invention provides a large-diameter wind power energy storage cable, comprising: a cable body and supporting components; The cable body includes: a central reinforcing core, multiple dispersed conductor bundles, a conductor wrapping frame, a heat-conducting mesh, a phase change heat-conducting filler, an insulation layer, a shielding layer, and a loose outer sheath; The conductor sheath includes a core sheath located at the center, multiple conductor sheaths radiating outwards from the core sheath, and connecting strips connecting the core sheath and the conductor sheaths; The central reinforcing core is located in the core wrapping layer, multiple dispersed conductor bundles are located in multiple conductor wrapping layers respectively, the heat-conducting mesh is set between multiple connecting strips to connect two adjacent connecting strips, the insulation layer is set on the outside of the conductor wrapping frame, the phase change heat-conducting filler is filled in the interior of the insulation layer to dissipate heat from the dispersed conductor bundles together with the heat-conducting mesh, the shielding layer is located on the outside of the insulation layer, and the scattered outer sheath is set on the outside of the shielding layer. The outer sheath of the flower is petal-shaped and hollow in shape. It includes a flower base that is connected to the shielding layer and a petal part that is not in contact with the shielding layer. The supporting components include restraint straps and a deployment frame.

[0005] Optionally, the central reinforcing core may be made of aramid fiber.

[0006] Optionally, the dispersed conductor bundle is made of multiple strands of fine copper wire twisted together.

[0007] Optionally, the connecting strip in the conductor wrapper is made of a flexible material.

[0008] Optionally, the heat-conducting mesh is shaped like a leaf vein, with its leaf stalk end close to the core wrapping layer.

[0009] Optionally, multiple petals in the petal section are pleated and overlap each other along one side. An air inlet group is provided on the outer side of the overlapping sidewall of the petal section, and an air outlet group is provided on the inner side of the overlapping sidewall of the petal section. When the outer protective sleeve of the scattered flowers unfolds, air enters the interior of the petal section through the air inlet group and is discharged through the air outlet group. When the outer protective sleeve of the scattered flowers closes, the air inlet group is blocked by the corresponding overlapping sidewall of the petal section, and the air outlet group is blocked by the overlapping sidewall of the adjacent petal section.

[0010] Optionally, the tip of the petal is provided with mounting protrusions at intervals, and multiple engaging holes are provided on both sides of the mounting protrusions.

[0011] Optionally, the restraint strap is made of an elastic material and is fitted over the gap of the mounting protrusion when the cable body is coiled.

[0012] Optionally, the unfolding frame includes multiple connecting clips, with connecting blocks on the inner side of the connecting clips engaging with engaging holes, and a sling on the outer side of the connecting clips, with a counterweight at one end of the sling.

[0013] Optionally, connecting ropes are provided between multiple connecting clips.

[0014] The beneficial effects of the technical solutions provided by the embodiments of the present invention include at least the following: 1. In the embodiments of the present invention, the structural design of the dispersed conductor bundle plus the radial conductor wrapping frame breaks through the rigidity limitation of the traditional large-diameter cable integrated conductor, making the conductor structure more flexible, effectively dispersing torsional stress, and avoiding conductor strand breakage caused by stress concentration. Second, in the embodiments of the present invention, the heat dissipation efficiency of large-diameter cables is improved by using a synergistic heat dissipation system of heat-conducting mesh and phase change heat-conducting filler, which solves the problem of heat accumulation under high current transmission. The petal-shaped outer sheath can achieve flexible switching between coiling and unfolding. In the coiled state, it is convenient for laying and transporting in narrow spaces, while in the unfolded state, it increases the heat dissipation area and protection range. The matching design of the supporting components and the cable body reduces the difficulty of installation and maintenance of large-diameter cables, and improves the overall reliability and service life of the cable in wind power generation and energy storage scenarios. Attached Figure Description

[0015] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of a large-diameter wind power energy storage cable provided in an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the variegated outer sheath of a large-diameter wind power energy storage cable provided in an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of a conductor structure frame for a large-diameter wind power energy storage cable provided in an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the cross-section of a large-diameter wind power energy storage cable provided in an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of an unfolding frame for a large-diameter wind power energy storage cable provided in an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached drawings: 100-Cable body; 110-Central reinforcing core; 120-Distributed conductor bundle; 130-Conductor sheath; 131-Core sheath; 132-Conductor sheath; 133-Connecting strap; 140-Heat-conducting mesh; 150-Phase change heat-conducting filler; 160-Insulation layer; 170-Shielding layer; 180-Outer sheath with scattered patterns; 181-Flower base; 182-Petal section; 183-Air inlet group; 184-Air outlet group; 185-Mounting protrusion; 186-Clamping hole; 200-Matching components; 210-Restraint strap; 220-Unfolding frame; 221-Connecting clip; 222-Connecting block; 223-Lifting rope; 224-Counterweight block; 225-Connecting rope. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0023] Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts disclosed in this invention.

[0024] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention.

[0025] Reference manual attached Figures 1 to 5 The present invention provides a structure for a large-diameter wind power energy storage cable, comprising: a cable body 100 and supporting components 200; The cable body 100 includes: a central reinforcing core 110, multiple dispersed conductor bundles 120, a conductor wrapping frame 130, a heat-conducting mesh 140, a phase change heat-conducting filler 150, an insulation layer 160, a shielding layer 170, and a loose outer sheath 180. The conductor wrapping frame 130 includes a core wrapping layer 131 located at the center, a plurality of conductor wrapping layers 132 arranged radially around the core wrapping layer 131, and a connecting strip 133 connecting the core wrapping layer 131 and the conductor wrapping layers 132. The central reinforcing core 110 is located in the core wrapping layer 131, and multiple dispersed conductor bundles 120 are respectively located in multiple conductor wrapping layers 132. The heat-conducting mesh 140 is disposed between multiple connecting strips 133 for connecting two adjacent connecting strips 133. The insulating layer 160 is disposed on the outside of the conductor wrapping frame 130. The phase change heat-conducting filler 150 is filled inside the insulating layer 160 for dissipating heat from the dispersed conductor bundles 120 together with the heat-conducting mesh 140. The shielding layer 170 is located on the outside of the insulating layer 160, and the scattered outer sheath 180 is disposed on the outside of the shielding layer 170. The outer protective sleeve 180 of the flower is petal-shaped and hollow in the whole. It includes a flower base 181 connected to the shielding layer 170 and a petal part 182 that does not contact the shielding layer 170. The supporting components 200 include restraint straps 210 and deployment frame 220.

[0026] The beneficial effects of the technical solutions provided by the embodiments of the present invention include at least the following: In this embodiment of the invention, the structural design of the dispersed conductor bundle 120 and the radial conductor wrapping frame 130 breaks the rigidity limitation of the traditional large-diameter cable integrated conductor, making the conductor structure more flexible, effectively dispersing torsional stress, and avoiding conductor strand breakage caused by stress concentration. With the help of the heat dissipation system of the heat-conducting mesh 140 and the phase change heat-conducting filler 150, the heat dissipation efficiency of the large-diameter cable is improved, and the problem of heat accumulation under high current transmission is solved. The petal-shaped outer sheath 180 can realize flexible switching between bundled and unfolded. In the bundled state, it is convenient for laying and transportation in narrow spaces. In the unfolded state, it increases the heat dissipation area and protection range. The matching design of the supporting components 200 and the cable body 100 reduces the installation and maintenance difficulty of the large-diameter cable, and improves the overall reliability and service life of the cable in wind power generation and energy storage scenarios.

[0027] In one possible implementation, the central reinforcing core 110 is made of aramid fiber.

[0028] In this embodiment of the invention, the central reinforcing core 110 made of aramid fiber material significantly improves the tensile strength of the cable, ensuring that the cable will not be stretched or deformed during long-term vertical laying, transportation and dragging, thus ensuring the integrity of the conductor structure and the stability of power transmission. On the other hand, it reduces the overall weight of the cable, reducing the equipment load and construction difficulty during transportation, hoisting and laying. At the same time, the corrosion resistance and anti-aging properties of aramid fiber extend the service life of the reinforcing core, thereby improving the overall environmental adaptability and service life of the cable.

[0029] In one possible implementation, the dispersed conductor bundle 120 is made of multiple strands of fine copper wire twisted together.

[0030] In this embodiment of the invention, the dispersed conductor bundle 120 adopts a multi-strand fine copper wire stranded structure, which significantly improves the flexibility and torsional resistance of the cable body 100. This enables the large-diameter cable to adapt to the dynamic torsional conditions at the connection between the wind turbine nacelle and the tower, avoiding the torsional breakage problem caused by excessive rigidity in traditional large-diameter cables. At the same time, it optimizes the conductivity and heat dissipation performance, ensuring the power transmission efficiency and thermal stability during high-current transmission. The redundant design improves the fault tolerance of the cable, reduces downtime accidents caused by local conductor damage, and ensures the continuous and stable operation of the wind power generation and energy storage system.

[0031] In one possible implementation, the connecting strip 133 in the conductor wrapper 130 is made of a flexible material.

[0032] In this embodiment of the invention, the flexible material connecting strip 133 enables the conductor wrapping frame 130 to have adaptive deformation capability, further improving the overall flexibility, torsion resistance, and bending resistance of the cable. This allows the cable to better adapt to the dynamic torsion and confined space laying requirements in wind power generation scenarios. The buffering and vibration reduction function reduces the damage to the conductor bundle and wrapping frame caused by vibration impact, extends the service life of the conductor wrapping frame 130, and avoids conductor bundle displacement and compression caused by the breakage of the connecting strip 133, ensuring the stability and safety of power transmission.

[0033] In one possible implementation, the heat-conducting mesh 140 is shaped like a leaf vein, with its leaf stem end close to the core wrapping layer 131.

[0034] In this embodiment of the invention, the blade-shaped heat-conducting mesh 140 constructs an efficient hierarchical heat dissipation path, realizing the rapid collection and dissipation of heat from various areas inside the cable, significantly improving heat dissipation efficiency, and effectively solving the problem of heat accumulation under high current transmission in large-diameter cables. At the same time, the heat-conducting mesh 140 connects to adjacent connecting strips 133, which can also enhance the overall structural strength of the conductor wrapping frame 130, preventing the connecting strips 133 from becoming loose due to excessive deformation. It takes into account both heat dissipation and structural reinforcement functions, improving the overall reliability of the cable.

[0035] In one possible implementation, the petals in the petal portion 182 are all pleated and overlap each other along one side. An air inlet group 183 is provided on the outer side of the overlapping sidewall of the petal portion 182, and an air outlet group 184 is provided on the inner side of the overlapping sidewall of the petal portion 182. When the flower-scattering outer sheath 180 is unfolded, air enters the interior of the petal portion 182 through the air inlet group 183 and is discharged through the air outlet group 184. When the flower-scattering outer sheath 180 is retracted, the air inlet group 183 is blocked by the corresponding petal overlapping sidewall, and the air outlet group 184 is blocked by the adjacent petal overlapping sidewall.

[0036] In this embodiment of the invention, the pleated overlapping structure and staggered air hole design of the petal portion 182 enable the outer sheath 180 to adapt to the working conditions of the wind turbine blades rotating and causing the cable to twist periodically, as well as the cable being laid vertically. When the cable swings periodically, the petal portion 182 of the outer sheath 180 unfolds, allowing the air inlet group 183 to enter the interior of the petal portion 182 and then exit from the outlet group 184, thereby accelerating the heat dissipation of the insulation layer 160. During transportation, the overlapping structure and staggered air hole design ensure that the air holes can be sealed when the outer sheath 180 is retracted, preventing corrosive media such as moisture, dust, and salt spray from entering the interior of the sheath and protecting the core structure of the cable.

[0037] In one possible implementation, the tip of the petal portion 182 is provided with mounting protrusions 185 at intervals, and both sides of the mounting protrusions 185 are provided with a plurality of engaging holes 186.

[0038] In this embodiment of the invention, the design of mounting protrusion 185 and engaging hole 186 enables a stable and convenient connection between the matching component 200 and the outer sheath 180, providing reliable structural support for the gathering and unfolding adjustment of the outer sheath. The detachable engaging connection reduces the difficulty of installation and maintenance, and reduces operation and maintenance costs.

[0039] In one possible implementation, the restraint strap 210 is made of an elastic material and is fitted over the gap of the mounting protrusion 185 when the cable body 100 is coiled.

[0040] In this embodiment of the invention, the elastic constraint band 210 achieves stable fixation of the outer sheath 180 in a coiled state, ensuring the compactness of the cable during transportation and laying in confined spaces, and avoiding accidental bumps or damage to the petal part 182 caused by accidental unfolding, or laying obstruction.

[0041] In one possible implementation, the unfolding frame 220 includes a plurality of connecting clips 221. The inner side of the connecting clip 221 is provided with a connecting block 222 that engages with the engaging hole 186. The outer side of the connecting clip 221 is provided with a sling 223, and one end of the sling 223 is provided with a counterweight 224.

[0042] In this embodiment of the invention, the snap-fit ​​connection design of the unfolding frame 220 enables a convenient and stable connection with the outer sheath. The counterweight-driven unfolding method eliminates the need for additional power equipment, reducing installation and operating costs. The even distribution of multiple connecting clips 221 ensures that the petal portion 182 is subjected to balanced force, ensuring the outer sheath unfolds smoothly and avoiding structural damage caused by excessive local stress. At the same time, by adjusting the weight of the counterweight block 224, the unfolding angle of the outer sheath can be precisely controlled to adapt to different heat dissipation requirements and improve the adjustability of the cable's operating status.

[0043] In one possible implementation, a connecting rope 225 is provided between a plurality of connecting clips 221.

[0044] In this embodiment of the invention, the connecting rope 225 enables the synchronous linkage and displacement restriction of multiple connecting clips 221, ensuring that the outer sheath 180 unfolds evenly, guaranteeing the stability and efficiency of the convection heat dissipation channel, avoiding insufficient local heat dissipation caused by asymmetrical unfolding, and preventing damage to the sheath and connecting structure due to excessive stretching, thus extending the service life of the supporting components 200 and the outer sheath. The connecting rope 225 can make the entire unfolding frame 220 an integrated structure, preventing the loss of unfolding frame 220 components.

[0045] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the preferred embodiments, while those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the protection scope of the present invention.

Claims

1. A large-diameter wind power energy storage cable, characterized in that, include: Cable body and supporting components; The cable body includes: a central reinforcing core, multiple dispersed conductor bundles, a conductor wrapping frame, a heat-conducting mesh, a phase change heat-conducting filler, an insulation layer, a shielding layer, and a loose outer sheath; The conductor wrapping frame includes a core wrapping layer located at the center, multiple conductor wrapping layers radiating outwards from the core wrapping layer, and a connecting strip connecting the core wrapping layer and the conductor wrapping layers; The central reinforcing core is located in the core wrapping layer, and the multiple dispersed conductor bundles are respectively located in multiple conductor wrapping layers. The heat-conducting mesh is disposed between multiple connecting strips to connect two adjacent connecting strips. The insulating layer is disposed on the outside of the conductor wrapping frame. The phase change heat-conducting filler is filled inside the insulating layer to dissipate heat from the dispersed conductor bundles together with the heat-conducting mesh. The shielding layer is located on the outside of the insulating layer, and the scattered outer sheath is disposed on the outside of the shielding layer. The outer sheath of the flower is petal-shaped and hollow in shape. It includes a flower base that is connected to the shielding layer and a petal part that is not in contact with the shielding layer. The supporting components include restraint straps and a deployment frame.

2. The large-diameter wind power energy storage cable according to claim 1, characterized in that, The central reinforcing core is made of aramid fiber.

3. The large-diameter wind power energy storage cable according to claim 1, characterized in that, The dispersed conductor bundle is made of multiple strands of fine copper wire twisted together.

4. The large-diameter wind power energy storage cable according to claim 1, characterized in that, The connecting strip in the conductor wrapping frame is made of flexible material.

5. The large-diameter wind power energy storage cable according to claim 1, characterized in that, The heat-conducting mesh is shaped like a leaf vein, with its leaf stalk end close to the core wrapping layer.

6. The large-diameter wind power energy storage cable according to claim 1, characterized in that, The petals in the petal section are all pleated and overlap each other along one side. An air inlet group is provided on the outer side of the overlapping sidewall of the petal section, and an air outlet group is provided on the inner side of the overlapping sidewall of the petal section. When the outer protective sleeve of the scattered flowers is unfolded, air enters the interior of the petal section through the air inlet group and is discharged through the air outlet group. When the outer protective sleeve of the scattered flowers is retracted, the air inlet group is blocked by the corresponding overlapping sidewall of the petal, and the air outlet group is blocked by the overlapping sidewall of the adjacent petal.

7. The large-diameter wind power energy storage cable according to claim 1, characterized in that, The tip of the petal portion is provided with mounting protrusions at intervals, and multiple engaging holes are provided on both sides of the mounting protrusions.

8. The large-diameter wind power energy storage cable according to claim 7, characterized in that, The constraint band is made of elastic material and is fitted onto the gap of the mounting protrusion when the cable body is coiled.

9. The large-diameter wind power energy storage cable according to claim 7, characterized in that, The unfolding frame includes multiple connecting clips. The inner side of each connecting clip is provided with a connecting block that engages with a locking hole. The outer side of each connecting clip is provided with a lifting rope, and one end of the lifting rope is provided with a counterweight.

10. The large-diameter wind power energy storage cable according to claim 9, characterized in that, A connecting rope is provided between the plurality of connecting clips.

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