A high-life cycle torsion-resistant cable for offshore wind power

Abstract

The invention relates to the field of power cables, in particular to a high-life cycle anti-torsion cable for offshore wind power, which includes a cable core composed of a plurality of insulated cores, and a tape layer covering the surface of the cable core; The surface is covered with an inner sheath layer; the outer surface of the inner sheath layer is covered with a mixed braiding layer; the outer surface of the mixed braiding layer is covered with an outer sheath layer; the insulated wire core includes a conductor and is covered in An insulating layer on a conductor; the conductor is formed by mixing and winding a plurality of copper wires and a plurality of fiber-copper composite wires; the fiber-copper composite wire includes an organic fiber at the center and one or more layers spirally wound on the outer surface of the organic fiber Copper foil; its fiber-copper composite wire can achieve high-strength tensile and torsion resistance and light weight; the above-mentioned cables are used in the control system of high-power offshore generators or the control system of land wind turbines.

Description

technical field [0001] The invention relates to the field of power cables, in particular to a high-life-cycle torsion-resistant cable for offshore wind power. Background technique [0002] As my country's wind power generation technology becomes more and more mature, onshore wind power resources are gradually developed, and offshore wind power is also gradually developed. Compared with onshore wind power, offshore wind power has the characteristics of rich resources, stable wind direction, long wind duration, no damage to forest land, high power generation utilization hours, and suitable for large-scale development. It has huge potential, and offshore wind power is increasingly favored by people. . [0003] The power of offshore wind turbines has gradually developed towards large megawatts. At present, it has developed into models with different powers such as 3MW, 5MW, 7MW, 8MW, and 10MW. The distance from offshore wind turbines to land ranges from hundreds of meters to te...

AI Technical Summary

Problems solved by technology

[0005] 1. The nominal section of the control cable is too small, generally 0.5mm 2 ~2.5mm 2 , the conductor adopts the fifth or sixth flexible conductor structure in the standard, the tensile strength of the conductor of the control cable is low, and the twisted control cable is prone to the problem of conductor core breakage within a few years, the signal transmission to the fan and Safety control brings great hidden dangers to quality and safety, and the number of anti-torsion of cables increases, which cannot meet the overall 20-year life expectancy of fans;

[0006] 2. Although the voltage withstood during operation is 24V, due to the design scheme of ethylene-propylene rubber insulation and chlorinated polyethylene sheath, according to the characteristics of the material, the insulation thickness of the cable should be at least 0.7mm, and the thickness of the sheath should be at least 0.7mm. It is also at least 2.0mm. As a result, the outer diameter of the cable is large and the weight is heavy. The cable has to bear its own weight and load, which is more likely to cause conductor fatigue and core breakage;

[0007] 3. The cabling direction of the multi-layer insulated core also causes quality problems such as cable bulging and insulated core deformation in the process of torsion and bending

[0008] Due to the existence of the above-mentioned defects, it cannot meet the demand for anti-torsion control cables of high-capacity offshore wind turbines, so it is necessary to develop a high-life-cycle anti-torsion control cable

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