Warp-resistant aluminum alloy wind power cable and preparation method thereof

Abstract

The invention belongs to the technical field of cables, and provides a twist-resistant aluminum alloy wind power cable and a preparation method thereof, a multi-strand aluminum alloy bunch in an aluminum alloy stranded wire comprises three aluminum alloy bunches distributed in the middle and nine aluminum alloy bunches distributed in the circumferential direction of the three aluminum alloy bunches distributed in the middle, and in the nine aluminum alloy bunches distributed in the circumferential direction, the three aluminum alloy bunches distributed in the circumferential direction and the nine aluminum alloy bunches distributed in the circumferential direction are distributed in the middle. A gap exists between every two adjacent aluminum alloy bunches, and the aluminum alloy stranded wires adopt a 3 + 9 two-layer arrangement structure to form a double-layer compound stranded structure, so that the forming structure of the conductor stranded wires is effectively compact, the overall mechanical strength in the stranded wires is also effectively enhanced, and meanwhile, enough space is reserved in the stranded wires for twisting the bunches, so that the twisting strength of the stranded wires is improved. The condition that the stranded wires of the conductor are broken after the cable is twisted can be avoided, and the conditions that the stranded wires are broken, the wire breaking proportion of the twisted conductor is large, and the resistance change before and after twisting is large in a wind power plant with large wind power frequency and force within a short time are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of cables, and in particular relates to a torsion-resistant aluminum alloy wind power cable and a preparation method thereof. Background Art

[0002] For a long time, torsion-resistant wind power cables have been made of soft copper conductors with soft texture and excellent performance. In recent years, the cable industry has invested a lot of research and development resources in finding new conductor materials to replace copper conductors. Wind turbine manufacturers and cable manufacturers are considering whether torsion-resistant cables can use soft aluminum alloy conductors. Using aluminum alloy conductors instead of traditional copper conductors can effectively reduce the weight of the cable and increase the service life of the cable. At the same time, the price of aluminum is relatively low, which can effectively reduce the cost of cable manufacturing.

[0003] However, in the current soft aluminum alloy wind power cables, the aluminum alloy bundles in the aluminum alloy stranded wire are arranged in the form of 1+6+12, and all the aluminum alloy bundles are closely arranged. During production, testing and use, especially in wind power sites, due to the high frequency and intensity of wind action, soft aluminum alloy wind power cables are prone to broken wires in the stranded wires in a short period of time, a high proportion of broken wires in the conductor after torsion, and a large change in resistance before and after torsion, which greatly limits the use of soft aluminum alloy in torsion-resistant wind power cables. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a torsion-resistant aluminum alloy wind power cable and a preparation method thereof, wherein three aluminum alloy bundles are distributed in the middle of the aluminum alloy stranded wire, nine aluminum alloy bundles are distributed circumferentially along the three aluminum alloy bundles distributed in the middle, and there is a gap between each two adjacent aluminum alloy bundles in the nine circumferentially distributed aluminum alloy bundles, forming a double-layer twisted structure, which not only effectively compacts the forming structure of the conductor strands, but also effectively enhances the overall mechanical strength inside the strands. At the same time, sufficient space is left inside the stranded wire for the bundle to twist, which can avoid the situation where the conductor strands break after the cable is twisted.

[0005] In order to achieve the above-mentioned object, in a first aspect, the present invention provides a torsion-resistant aluminum alloy wind power cable, which adopts the following technical solution:

[0006] A twist-resistant aluminum alloy wind power cable comprises an aluminum alloy conductor, wherein the aluminum alloy conductor comprises a center filler and an aluminum alloy strand, wherein the aluminum alloy strand comprises an aluminum alloy stranded wire and a semi-conductive tape, and wherein the aluminum alloy stranded wire comprises a plurality of aluminum alloy bundled wires;

[0007] The multiple aluminum alloy bundles in the aluminum alloy stranded wire include three aluminum alloy bundles distributed in the middle and nine aluminum alloy bundles distributed circumferentially along the three aluminum alloy bundles distributed in the middle. Among the nine aluminum alloy bundles distributed circumferentially, there is a gap between every two adjacent aluminum alloy bundles.

[0008] Furthermore, the twisting direction of the aluminum alloy stranded wire is consistent with the bundled twisting direction of the aluminum alloy bundled wire.

[0009] Furthermore, the central filling layer includes an organic fiber rope and a shielding layer arranged outside the organic fiber rope.

[0010] Furthermore, the organic fiber rope is poly(p-phenylene terephthalamide) with a fiber count of 300D to 5000D, and a diameter of the organic fiber rope is 2mm to 8mm.

[0011] Furthermore, the shielding layer is a rubber shielding material with EPDM as the base material and conductive carbon black as the conductive carrier; the weight ratio of the raw material components of the shielding layer is: 100 parts of EPDM rubber, 2 to 4 parts of cross-linking agent, 12 to 25 parts of composite plasticizer, 2 parts of antioxidant, 25 to 35 parts of conductive carbon black, 4 parts of dispersing aid, and 5 to 8 parts of graphite powder.

[0012] Furthermore, a wrapping layer is provided outside the aluminum alloy conductor, and the wrapping layer is made of non-woven fabric material.

[0013] Furthermore, an insulating layer is provided on the wrapping layer, and the insulating layer is made of ethylene propylene rubber material.

[0014] Furthermore, a sheath is provided on the insulating layer, and the sheath is chlorinated polyethylene or polyurethane elastomer.

[0015] Furthermore, each aluminum alloy wire in the aluminum alloy bundle includes 0.05%-0.5% magnesium, 0.05%-0.3% silicon, 0.03%-0.3% iron, 0.025%-0.25% copper, 0.01%-0.05% boron, 0.001%-0.04% titanium, 0.01%-0.04% rare earth elements, and aluminum.

[0016] In order to achieve the above-mentioned purpose, in a second aspect, the present invention also provides a method for preparing a torsion-resistant aluminum alloy wind power cable, which adopts the following technical solution:

[0017] A method for preparing a torsion-resistant aluminum alloy wind power cable, used for manufacturing the torsion-resistant aluminum alloy wind power cable as described in the first aspect, comprising:

[0018] A center filler and an aluminum alloy strand are arranged in the aluminum alloy conductor, an aluminum alloy strand and a semi-conductive tape are arranged in the aluminum alloy strand, and a plurality of aluminum alloy bundles are arranged in the aluminum alloy strand;

[0019] The multiple aluminum alloy bundles in the aluminum alloy stranded wire are arranged as three aluminum alloy bundles distributed in the middle and nine aluminum alloy bundles distributed circumferentially along the three aluminum alloy bundles distributed in the middle. In the nine aluminum alloy bundles distributed circumferentially, a gap is arranged between every two adjacent aluminum alloy bundles.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the present invention, the multiple strands of aluminum alloy bundles in the aluminum alloy twisted wire include three strands of aluminum alloy bundles distributed in the middle, and nine strands of aluminum alloy bundles distributed circumferentially along the three strands of aluminum alloy bundles distributed in the middle. In the nine strands of aluminum alloy bundles distributed circumferentially, there is a gap between each two adjacent strands of aluminum alloy bundles. The aluminum alloy twisted wire adopts a two-layer arrangement structure of 3+9 to form a double-layer complex twisted structure, which not only effectively compacts the forming structure of the conductor strands, but also effectively enhances the overall mechanical strength inside the strands. At the same time, sufficient space is left inside the twisted wire for the bundle to twist, which can avoid the situation where the conductor strands break after the cable is twisted, and avoid the situation where the strands are broken in the strands in a wind farm with high wind frequency and strength in a short period of time, the proportion of conductor broken wires after twisting is large, and the resistance change before and after twisting is large.

[0022] 2. The present invention arranges a central filling layer in the center of the aluminum alloy conductor. The central filling layer after the aramid rope is extruded and semi-conductively shielded has softness, ensuring that each aluminum alloy strand has a buffer layer during the torsion process. When twisted to the extreme position, adjacent strands will generate mutual squeezing force. Since the central filling layer has a certain elasticity, there is no hard collision between the strands, which reduces the compression and mutual mechanical force between the aluminum alloy strands to the greatest extent, which is very beneficial to the integrity of each strand after the cable is torsion.

[0023] 3. In the aluminum alloy conductor of the present invention, the proportion of rare earth elements that are not conducive to improving the elongation of the aluminum alloy conductor is set to 0.01%-0.04%, and is used in combination with 0.03%-0.3% of iron and 0.025%-0.25% of copper. On the basis of ensuring the degassing effect, the elongation of the aluminum alloy conductor is improved by reducing and controlling the proportion of rare earth elements, and the mechanical properties of the aluminum alloy conductor are guaranteed. The low content of iron elements of 0.025%-0.25% not only ensures the mechanical and electrical properties required by the conductor, but also reduces the adverse effects brought by them. The tensile strength of the aluminum alloy conductor is improved by controlling the content of magnesium elements and silicon elements, especially the control of magnesium elements. On the basis of ensuring the mechanical properties, the conductivity of the aluminum alloy conductor is improved; the problems that the current aluminum alloy conductors are prone to breakage of wires in stranded wires, a large proportion of broken wires in conductors after torsion, and a large change in resistance before and after torsion are solved.

[0024] 4. The present invention improves the tensile strength and elongation at break of a single wire through the preparation of an aluminum alloy conductor, so that the aluminum alloy conductor can be effectively used in torsion-resistant wind power cables to form cost-effective wind power cables.

[0025] 5. The present invention greatly improves the overall tensile strength of the conductor and the cable through the design of the conductor center filling layer, and the fiber rope is soft and has good bending performance, which greatly helps to improve the bending performance and torsion performance of the cable; the central filling layer eliminates the friction and extrusion between the outer conductor strands and the inner strands, eliminates the risk of inner strand breakage, and plays a key role in preventing the breakage of single wires or strands during the torsion of the cable;

[0026] 6. The present invention effectively reduces the risk of breakage caused by mutual embedding of strands due to friction between strands during torsion tests through the design of conductor strand segmentation, thereby reducing the risk of a large rate of change in conductor resistance after the torsion test, so as to adapt to the technical requirements of use in torsion working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings in the specification that constitute a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments of this embodiment and their descriptions are used to explain this embodiment and do not constitute improper limitations on this embodiment.

[0028] Figure 1 This is a schematic diagram of the cable structure of Example 1 of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the central filling layer of Example 1 of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of the aluminum alloy strand according to Example 1 of the present invention;

[0031] Among them, 1. aluminum alloy conductor; 11. center filling layer; 111. organic fiber rope; 112. shielding layer; 12. aluminum alloy strand; 121. aluminum alloy twisted wire; 1211. aluminum alloy bundled wire; 122. semi-conductive tape; 2. tape layer; 3. insulation layer; 4. sheath. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0034] Embodiment 1:

[0035] For a long time, torsion-resistant wind power cables have been formed with soft copper conductors with soft texture and excellent performance. In recent years, the cable industry has invested a lot of research and development resources in finding new conductor materials to replace copper conductors. With the application of aluminum alloy conductor cables in the wind power industry, various wind turbine manufacturers and cable manufacturers are also considering whether torsion-resistant cables can use soft aluminum alloy conductor cables. Using aluminum alloy conductors instead of traditional copper conductors can effectively reduce the weight of the cable and increase the service life of the cable. At the same time, the price of aluminum is relatively low, which can effectively reduce the cost of cable manufacturing.

[0036] Aluminum conductors have poor mechanical strength, are easy to break, are prone to creep, require frequent tightening of screws during installation, are prone to overload and heat generation, pose safety hazards, and are prone to electrochemical and chemical corrosion. These problems have greatly limited the application of aluminum conductors in cables, especially in cables that require flexibility. In addition, during production and test verification, soft aluminum alloy wind power cables are prone to wire breakage in the stranded wires, a large proportion of wire breakage in the conductor after torsion, and a large change in resistance before and after torsion, which greatly limits the use of soft aluminum alloy in torsion-resistant wind power cables.

[0037] In order to solve only one of the above problems, such as Figure 1 As shown, this embodiment provides a torsion-resistant aluminum alloy wind power cable, which includes an aluminum alloy conductor 1, a tape layer 2, an insulating layer 3 and a sheath 4 from the inside to the outside; the aluminum alloy conductor 1 includes a center filling 11 and an aluminum alloy strand 12, the center filling layer 11 includes an organic fiber rope 111 and a shielding layer 112, the aluminum alloy strand 12 includes an aluminum alloy strand 121 and a semi-conductive tape 122, the aluminum alloy strand 121 includes an aluminum alloy bundle 1211; each aluminum alloy wire in the aluminum alloy bundle 1211 includes the following qualities Elements in percentage by amount: magnesium (Mg) 0.05%-0.5%, silicon (Si) 0.05%-0.3%, iron (Fe) 0.03%-0.3%, copper (Cu) 0.025%-0.25%, boron (B) 0.01%-0.05%, titanium (Ti) 0.001%-0.04%, rare earth elements 0.01%-0.04%, other impurities <0.1%, of which each single impurity <0.03%, and the balance is aluminum (Al).

[0038] Specifically, in terms of element composition, the aluminum alloy conductor 1 is based on aluminum, and aluminum-boron and titanium-boron master alloy grain refiners are added to increase crystal nuclei and refine the grains; rare earth elements are added for degassing, mainly for removing hydrogen, refining the crystal nuclei and improving the organizational properties of aluminum, especially reducing the influence of silicon on electrical conductivity and process performance, and greatly improving the tensile strength; a small amount of copper and iron are added for solid solution strengthening; magnesium and silicon elements are beneficial to improving the tensile strength of the aluminum alloy conductor; the addition of the above elements improves the performance of the aluminum alloy conductor in some aspects, but also has adverse effects, for example, rare earth elements are not conducive to improving the elongation of the aluminum alloy conductor, iron has an adverse effect on the processing performance of the alloy conductor, copper has a more obvious deteriorating effect on the electrical conductivity of the aluminum alloy conductor, and iron and copper cooperate to further The conductivity of the aluminum alloy conductor is reduced, while magnesium and silicon elements are not conducive to improving the conductivity of the aluminum alloy conductor; therefore, on the basis of adding the above elements, this embodiment further limits the addition amount of each element, wherein Mg: 0.05%-0.5%; Si: 0.05%-0.3%; Fe: 0.03%-0.3%; Cu: 0.025%-0.25%; B: 0.01%-0.05%; Ti: 0.001%-0.04%; rare earth elements: 0.01%-0.04%, wherein the rare earth elements are derived from one or more of AlRE10 aluminum rare earth master alloy, MgCe15 master alloy and AlTi5B1RE10 master alloy; other impurities <0.1%, wherein each single impurity <0.03%; the balance is Al.

[0039] Under the above ratios of the elements, the elements in the aluminum alloy affect each other. For example, the amount of rare earth elements in this embodiment is low, only 0.01-0.04wt%, which not only reduces the influence of silicon on the conductivity of the conductor, but also reduces the influence of other impurity elements on the conductivity of the aluminum alloy conductor. In particular, when the rare earth element is selected from AlRE10 aluminum rare earth master alloy, the conductivity of the aluminum alloy conductor is better than others, because the synergistic effect between the rare earth elements in AlRE10 aluminum rare earth master alloy reduces the influence of impurity atoms on the conductivity of the aluminum alloy conductor. Since the amount of rare earth elements is low, the effect on the elongation of the aluminum alloy conductor is small. However, due to the low amount of rare earth elements, the degassing effect brought by the rare earth elements is weakened. However, when 0.01-0.04wt% of rare earth elements, 0.03-0.3wt% of Fe and 0.025-0.25wt% of Cu are added first and then other raw materials are added, compared with adding all the added element raw materials together, the degassing effect is better and the mechanical properties of the aluminum alloy conductor are improved. In addition, in the present invention, Fe is 0.03-0.3wt% and the iron content is low, which not only ensures the mechanical properties and electrical properties required by the conductor, but also reduces the adverse effects brought by them. Especially when the element composition of the conductor is Mg 0.153%, Si 0.08%, Fe 0.03%, Cu 0.025%, B 0.033%, Ti 0.03%, rare earth elements 0.027%, other impurities <0.1%, and the balance is Al; or Mg 0.45%, Si 0.3%, Fe 0.15%, Cu 0.1%, B 0.049%, Ti 0.04%, rare earth elements 0.01%, other impurities <0.1%, and the balance is Al, the elongation of the conductor is better, reaching more than 19%, the tensile strength is more than 180 MPa, and the conductivity is more than 61% IACS.

[0040] The central filling 11 includes an organic fiber rope 111 and an electric shielding layer 112, or includes an organic fiber rope 111 and a semi-conductive tape, in order to prevent the outer layer strands from squeezing the central strands and causing the central strands to break as a whole during torsion, and also to improve the overall tensile strength of the cable. The shielding layer 112 may be a semi-conductive shielding layer.

[0041] Optionally, in order to achieve high strength and torsion resistance, the organic fiber rope 111 is poly(p-phenylene terephthalamide), commonly known as aramid fiber, with a fiber count of 300D to 5000D, and a diameter of 2mm to 8mm. The organic fiber rope 111 is woven from a low helix angle aramid fiber core material, and the outer layer is tightly woven from extremely fine polyamide fibers, which has high wear resistance to obtain the maximum strength-to-weight ratio.

[0042] The shielding layer 112 is a rubber shielding material; optionally, the shielding layer 112 is made of ethylene propylene rubber as a base material and conductive carbon black as a conductive carrier. In order to reduce the proportion of single filament or strand breakage caused by friction between the strands, the raw materials and weight ratios involved in the effective components of the shielding layer 112 are as follows: the shielding layer 112, by weight, includes: 100 parts of ethylene propylene rubber, 2 to 4 parts of cross-linking agent, 12 to 25 parts of composite plasticizer, 2 parts of antioxidant, 25 to 35 parts of conductive carbon black, 4 parts of dispersing aid, and 5 to 8 parts of graphite powder. The obtained rubber has a volume resistivity of ≤100Ω·m at 20℃, a volume resistivity of ≤500Ω·m at 90℃, and a Shore A hardness of ≤70. It has good process performance and excellent insulation shielding performance. The conductivity at high temperature remains stable, which can extend the service life of the cable.

[0043] By setting an organic fiber rope in the center of the center rubber strip filling, the tensile strength of the center filling 11 is maximized. Aramid fiber is the full name of poly (p-phenylene terephthalamide), which is a new high-tech synthetic fiber with excellent properties such as ultra-high strength, high modulus, high temperature resistance, acid and alkali resistance, and light weight. Its strength is 5-6 times that of steel wire, its modulus is 2-3 times that of steel wire or glass fiber, its toughness is 2 times that of steel wire, and its weight is about 1 / 5 of that of steel wire. It does not decompose or melt at a high temperature of 560°C. It has good insulation and anti-aging properties and a long life cycle. The aramid rope is set in the center of the conductor, and the breaking force is significantly improved. Taking the aramid rope with a diameter of 4mm as an example, the breaking force can reach more than 1000kg, which is dozens of times the weight of a cable with a length of more than 10 meters. The overall strength of the cable is greatly improved.

[0044] At the same time, a central filling layer 11 is arranged in the center of the aluminum alloy conductor. The central filling layer 11 after the aramid rope is extruded and semi-conductively shielded is soft, ensuring that each aluminum alloy strand 12 has a buffer layer during the torsion of the central filling layer 11. When twisted to the extreme position, adjacent strands will generate mutual squeezing force. Since the central filling layer 11 has a certain elasticity, there is no hard collision between the strands, which reduces the compression and mutual mechanical force between the aluminum alloy strands to the greatest extent, which is very beneficial to the integrity of each strand after the cable is torsion.

[0045] The aluminum alloy strands 12 are composed of aluminum alloy twisted wires wrapped with semi-conductive tapes, mainly to prevent the aluminum alloy conductor strands from directly contacting each other during the cable torsion process, and to prevent the single wires between the strands from being embedded in each other and causing breakage during the torsion process.

[0046] Optionally, in order to improve the internal extrusion resistance of the strands, reduce the fatigue stress of the conductors, and reduce the single wire breakage phenomenon inside the strands, the aluminum alloy stranded wire 121 is formed by 0.3mm-0.5mm aluminum alloy wires through bundled wire twisting, and the aluminum alloy stranded wire 121 adopts a 3+9 two-layer arrangement structure to form a double-layer twisted structure, which not only effectively compacts the forming structure of the conductor strands, but also effectively enhances the overall mechanical strength inside the strands. At the same time, there is enough space inside the strands for the bundles to twist, so as to avoid the conductor strands from breaking after the cable is twisted.

[0047] The aluminum alloy stranded wire 121 is formed by twisting 12 aluminum alloy bundles 1211, and the twisting direction of the aluminum alloy stranded wire 121 is consistent with the twisting direction of the aluminum alloy bundles 1211, both of which are left-handed. The aluminum alloy bundles 1211 are formed by twisting 6 to 20 aluminum alloy wire bundles with a single wire diameter of 0.3 mm to 0.5 mm.

[0048] Optionally, the semi-conductive tape 122 is a tape layer wrapped around the aluminum alloy stranded wire 121, and the material may be a semi-conductive nylon tape with a thickness of 0.1 mm to 0.2 mm, and the overlap rate of the tape is controlled at 10% to 20%.

[0049] In order to improve the anti-extrusion ability between strands, reduce the fatigue stress of the conductor, and reduce the breakage phenomenon between strands, a semi-conductive nylon belt 122 is used between each strand to separate each strand unit, so as to avoid the phenomenon that each strand is embedded in each other and cannot return to its original position during the torsion process, thereby reducing the breakage ratio of the single wire or strand.

[0050] The tape layer 2 is a tape layer coated on the outside of the aluminum alloy conductor 1. The material can be non-woven fabric with a thickness of 0.1 mm to 0.2 mm, and the overlap rate of the tape is controlled at 10% to 20%.

[0051] The insulating layer 3 is a rubber extrusion layer extruded outside the wrapping layer 2, and the extrusion thickness is 1.6mm-3.0mm; the optional material is ethylene propylene rubber.

[0052] The sheath is a rubber extrusion layer extruded outside the insulating layer 3, and the extrusion thickness is 1.6mm-3.8mm; the optional material is chlorinated polyethylene or polyurethane elastomer that is resistant to low temperature, flame retardant and ozone resistant.

[0053] Embodiment 2:

[0054] This embodiment provides a method for preparing a torsion-resistant aluminum alloy wind power cable, which is used to manufacture the torsion-resistant aluminum alloy wind power cable as described in Embodiment 1, comprising:

[0055] A center filler and an aluminum alloy strand are arranged in the aluminum alloy conductor, an aluminum alloy strand and a semi-conductive tape are arranged in the aluminum alloy strand, and a plurality of aluminum alloy bundles are arranged in the aluminum alloy strand;

[0056] The multiple aluminum alloy bundles in the aluminum alloy stranded wire are arranged as three aluminum alloy bundles distributed in the middle and nine aluminum alloy bundles distributed circumferentially along the three aluminum alloy bundles distributed in the middle. In the nine aluminum alloy bundles distributed circumferentially, a gap is arranged between every two adjacent aluminum alloy bundles.

[0057] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. A torsion-resistant aluminum alloy wind power cable, characterized in that: The aluminum alloy conductor comprises a center filler and an aluminum alloy strand, the aluminum alloy strand comprises an aluminum alloy strand and a semi-conductive tape, and the aluminum alloy strand comprises a plurality of aluminum alloy bundles; The multiple aluminum alloy bundles in the aluminum alloy stranded wire include three aluminum alloy bundles distributed in the middle and nine aluminum alloy bundles distributed circumferentially along the three aluminum alloy bundles distributed in the middle. Among the nine aluminum alloy bundles distributed circumferentially, there is a gap between every two adjacent aluminum alloy bundles.

2. The twist-resistant aluminum alloy wind power cable according to claim 1, characterized in that: The twisting direction of the aluminum alloy stranded wire is consistent with the bundle twisting direction of the aluminum alloy bundled wire.

3. The twist-resistant aluminum alloy wind power cable according to claim 1, characterized in that: The central filling layer includes an organic fiber rope and a shielding layer arranged outside the organic fiber rope.

4. The twist-resistant aluminum alloy wind power cable according to claim 3, characterized in that: The organic fiber rope is poly(p-phenylene terephthalamide), the fiber count is 300D-5000D, and the diameter of the organic fiber rope is 2mm-8mm.

5. The twist-resistant aluminum alloy wind power cable according to claim 3, characterized in that: The shielding layer is a rubber shielding material with EPDM as the base material and conductive carbon black as the conductive carrier; the weight ratio of the raw material components of the shielding layer is: 100 parts of EPDM rubber, 2 to 4 parts of cross-linking agent, 12 to 25 parts of composite plasticizer, 2 parts of antioxidant, 25 to 35 parts of conductive carbon black, 4 parts of dispersing aid, and 5 to 8 parts of graphite powder.

6. The twist-resistant aluminum alloy wind power cable according to claim 1, characterized in that: A wrapping layer is arranged outside the aluminum alloy conductor, and the wrapping layer is made of non-woven fabric material.

7. The twist-resistant aluminum alloy wind power cable according to claim 6, characterized in that: An insulating layer is arranged on the wrapping layer, and the insulating layer is made of ethylene propylene rubber material.

8. The twist-resistant aluminum alloy wind power cable according to claim 7, characterized in that: A sheath is arranged on the insulating layer, and the sheath is made of chlorinated polyethylene or polyurethane elastomer.

9. The twist-resistant aluminum alloy wind power cable according to claim 1, characterized in that: Each aluminum alloy wire in the aluminum alloy bundle includes 0.05%-0.5% magnesium, 0.05%-0.3% silicon, 0.03%-0.3% iron, 0.025%-0.25% copper, 0.01%-0.05% boron, 0.001%-0.04% titanium, 0.01%-0.04% rare earth elements, and aluminum.

10. A method for preparing a torsion-resistant aluminum alloy wind power cable, characterized in that: Used to manufacture the torsion-resistant aluminum alloy wind power cable according to any one of claims 1 to 9, comprising: A center filler and an aluminum alloy strand are arranged in the aluminum alloy conductor, an aluminum alloy strand and a semi-conductive tape are arranged in the aluminum alloy strand, and a plurality of aluminum alloy bundles are arranged in the aluminum alloy strand; The multiple aluminum alloy bundles in the aluminum alloy stranded wire are arranged as three aluminum alloy bundles distributed in the middle and nine aluminum alloy bundles distributed circumferentially along the three aluminum alloy bundles distributed in the middle. In the nine aluminum alloy bundles distributed circumferentially, a gap is arranged between every two adjacent aluminum alloy bundles.

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