CN217113942U - 35kV aluminum alloy power cable for wind power generation - Google Patents

Abstract

The utility model discloses a 35kV aluminum alloy power cable for wind power generation, this cable adopt aluminum alloy abnormal shape conductor, the three-layer is crowded insulation altogether and inside and outside shielding layer, winds the package copper strips, with three-core transposition stranding, utilize the filler strip that blocks water to fill and block water around the package and tighten, the cable core is crowded package polyethylene waterproof inner sheath outward, indulges the package with the aluminium strip, forms good waterproof layer, crowded pottery polyolefin separates the oxygen material again, outer winding steel wire armor, outmost be the fire-retardant sheath of TPU. The product has excellent waterproof, tear-resistant, wear-resistant, flame-retardant and other performances, stable transmission performance and long service life, is mainly used for connecting a high-voltage side of a medium-voltage transformer at the rear part of an engine room and a medium-voltage switch cabinet at the bottom of a tower cylinder of a wind driven generator by a large-scale wind driven generator set, and can meet the operation requirements of a large-capacity wind driven generator of 3 MW-5 MW.

Description

35kV aluminum alloy power cable for wind power generation

Technical Field

The utility model relates to the technical field of cables, especially, relate to a 35kV aluminum alloy power cable for wind power generation.

Background

Along with the gradual increase of the single fan capacity, the fan unit structure is diversified; the land mainstream model develops to 2-3 MW, and marine mainstream model develops to more than 5MW from 3MW, and the rated voltage 26/35kV and following medium voltage wind energy cable's that use with it supporting increases year by year, along with the continuous promotion of copper price, how to control the project cost on guaranteeing the electrically conductive performance of product, has become the problem that needs to solve at present urgently. Land fan mainly installs in the mountain area, and spring and summer festival is more the rainwater, and the environment is moist, and autumn and winter season is dry, easily takes place mountain fire, and offshore fan installs in the coastal waters, soaks in the aquatic for a long time, to the particularity of in service behavior, the product not only need have better waterproof performance, and must have higher fire-retardant environmental protection characteristic yet, for this reason my company is to the current market demand, has researched and developed 35kV aluminum alloy power cable for wind power generation.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is exactly in order to remedy prior art's defect, provides a 35kV aluminum alloy power cable for wind power generation.

The utility model discloses a realize through following technical scheme:

the utility model provides a 35kV aluminum alloy power cable for wind power generation, including the conductor outside three-layer crowded interior semiconduction shielding layer altogether, crosslinked polyethylene insulating layer and outer semiconduction shielding layer, then constitute the sinle silk around covering copper tape shielding layer again, after twisting three sinle silks into the cable core, recycle the packing that blocks water and pack and block water around the band and tighten, crowded package polyethylene waterproof inner sheath again outside the cable core, the cladding has the aluminium strip to indulge the covering again in proper order in the waterproof inner sheath outside of polyethylene, pottery polyolefin separates the oxygen layer, steel wire winding armor and fire-retardant oversheath.

The conductor is an aluminum alloy special-shaped conductor.

The flame-retardant outer sheath is a TPU flame-retardant sheath.

The utility model has the advantages that: the utility model discloses have good waterproof, anti tear, wear-resisting, fire-retardant performance to and stable transmission performance, longer life, the large-scale wind generating set of mainly used connects the high-pressure side that is located cabin rear portion medium voltage transformer and the medium voltage switch cabinet that is located aerogenerator tower section of thick bamboo bottom, can satisfy 3MW ~ 5MW large capacity aerogenerator's operation requirement.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

As shown in figure 1, a 35kV aluminum alloy power cable for wind power generation, including conductor 1 the 1 outside three-layer of conductor crowded interior semiconductive shield 2 altogether, crosslinked polyethylene insulating layer 3 and outer semiconductive shield 4, then around package copper strips shielding layer 5 constitution sinle silk again, after three sinle silks twisted into the cable core, reuse the packing that blocks water 6 packs and blocks water around package 7 tight, crowded package polyethylene waterproof inner sheath 8 again outside the cable core, the cladding has aluminium strip longitudinal wrapping layer 9 again in proper order in the waterproof inner sheath 8 outside of polyethylene, pottery polyolefin separates oxygen layer 10, steel wire winding armor 11 and fire-retardant 12.

The conductor 1 is an aluminum alloy special-shaped conductor.

The flame-retardant outer sheath 12 is a TPU flame-retardant sheath.

The utility model provides a 35kV aluminum alloy power cable for wind power generation has better electrical property, good waterproof, anti tear, wear-resisting, characteristics such as fire-retardant environmental protection, and the high-pressure side that mainly used large-scale wind generating set connects the high-tension side that is located cabin rear portion medium voltage transformer and the medium voltage switch cabinet that is located aerogenerator tower section of thick bamboo bottom to and the cubical switchboard power connection between the tower section of thick bamboo etc. can satisfy 3MW ~ 5MW large capacity aerogenerator's operation requirement.

The product adopts the aluminum alloy special-shaped conductor, most of the traditional aluminum alloy stranded conductors are formed by stranding aluminum alloy monofilaments with the cross sections as the circle centers, after the single wires are stranded, the gaps between the stranded wires and the stranded wire layers are large, the structural compactness is low, the electrical performance of the stranded wires is influenced, the outer diameter of the conductor is large, the materials of subsequent various procedures are increased, and the production cost of the product is increased. The product stranded conductor adopts the special-shaped aluminum alloy monofilament, adopts the ultra-conventional pressing technology and annealing treatment, so that the pressing coefficient between stranded wires and between stranded layers meets the requirement, the core of the stranded conductor is a solid conductor, the conductivity of the equal sectional areas of the aluminum alloy core is greatly improved, and the stranded conductor has better electrical performance and economic performance. The conductor is externally co-extruded and insulated in three layers by using 35kV crosslinking production equipment, and the three layers are respectively an inner conductive shielding layer, an insulating layer and an outer conductive shielding layer. And the copper strip is wound on the outer layer after the insulation extrusion, and when the system is short-circuited, the copper strip is used as a short-circuit current channel and plays a role in shielding an electric field. The three wire cores wound with the copper strips are stranded into a cable, the water-blocking filling strips are used for filling and the water-blocking wrapping tapes are used for tightly wrapping the cable, a longitudinal waterproof effect is achieved on the cable, and moisture at two ends of the cable can be effectively prevented from permeating. The stranded cable core is externally extruded with the polyethylene waterproof inner protection layer, the polyethylene has good chemical stability, can resist the corrosion of most of acid and alkali, has small water absorption and good waterproof performance. The inner sheath is indulged outward and is wrapped the aluminium belt layer and as waterproof insulation cover, forms radially to block water, can effectively prevent outside moisture content to get into the inlayer, also plays the effect of oxygen barrier layer simultaneously, can prevent outside air and flame to get into the inlayer when meeting the conflagration. The ceramic polyolefin oxygen-insulating layer is extruded to enhance the flame retardant property of the cable, and the cross section of the ceramic halogen-free low-smoke polyolefin flame-retardant fire-resistant oxygen-insulating material after ablation can generate uniform microporous ceramic, so that the cable has good heat insulation, heat insulation and fire blocking effects, and the fire-blocking and heat-insulating effects are higher than those of an aluminum alloy protective layer. Separate the outer steel wire armor of winding of oxygen layer, traditional steel band armor is compared to the steel wire armor, can bear certain external pressure, also can stand general vertical pulling force, and the wind power tower cylinder of specially adapted is inside lays perpendicularly. The outer layer of the cable is a TPU flame-retardant sheath, so that the cable has excellent flame-retardant property and can better meet the special requirements of wind energy cable sheaths on oil resistance, corrosion resistance, ozone resistance, weather resistance, wear resistance and the like. The overall design of the cable saves the production cost, fully considers the waterproof and flame-retardant performances, and can effectively prolong the service life of the product.

Claims (3)

1. The utility model provides a 35kV aluminum alloy power cable for wind power generation which characterized in that: including the conductor outside three-layer crowded interior semiconduction shielding layer altogether, crosslinked polyethylene insulating layer and outer semiconduction shielding layer, then constitute the sinle silk around covering copper tape shielding layer again, after twisting three sinle silks into the cable core, recycle and block water the packing and fill and block water around covering around the band and tighten, crowded package polyethylene waterproof inner sheath again outside the cable core, the cladding has aluminium area to indulge the covering again in proper order in the waterproof inner sheath outside of polyethylene, pottery polyolefin separates the oxygen layer, steel wire winding armor and fire-retardant oversheath.

2. The 35kV aluminum alloy power cable for wind power generation according to claim 1, wherein: the conductor is an aluminum alloy special-shaped conductor.

3. The 35kV aluminum alloy power cable for wind power generation according to claim 1, wherein: the flame-retardant outer sheath is a TPU flame-retardant sheath.

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