Medium-voltage torsion-resistant power cables for wind turbines

Abstract

The invention discloses a medium-pressure torsion-resistant power cable. The power cable comprises at least one power cable core, at least one grounding cable core twisted with the power cable core, and a sheath layer wrapping the power cable core and the grounding cable core, wherein the power cable core comprises a conductor and an insulating layer covering the conductor; the insulating layer comprises the following components: ethylene propylene diene monomer rubber, microcrystalline wax, paraffin oil, antimony trioxide, titanium dioxide, nano zinc oxide, calcined kaolin, a coupling agent,an anti-aging agent, a vulcanizing agent and a vulcanizing assistant; and the sheath layer comprises the following components: chlorinated polyethylene, magnesium hydroxide, white carbon black, modified calcined kaolin, a thermoplastic elastomer, the anti-aging agent, red lead masterbatch, the antimony trioxide, light magnesium oxide, a calcium-zinc stabilizer, stearic acid, high-wear-resistant carbon black, a plasticizer, a cold-resistant plasticizer, the coupling agent, the vulcanizing agent and a vulcanization accelerator. The problem of the reduced service life of the torsion-resistant power cable of the 8MW offshore wind generating set due to long-term high-load flow, bending fatigue, aging, tearing and the like can be solved.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a medium-voltage torsion-resistant power cable for an 8MW offshore wind power generating set. Background technique [0002] Compared with land wind farms, offshore wind farms are located in a very complex and harsh marine environment, bearing a variety of random loads that vary with time and space, including wind, waves, currents, sea ice, and tides that act on the structure. , and is also threatened by earthquake action. Under such harsh environmental conditions, unfavorable factors such as environmental corrosion, marine organism adhesion, foundation soil erosion and foundation dynamic softening, material aging, component defects and mechanical damage, fatigue and damage accumulation of crack propagation will cause damage to offshore wind turbine structural components and The attenuation of the overall resistance affects the operational safety and durability of t...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a medium-voltage torsion-resistant power cable for wind power generators, which uses ethylene-propylene rubber insulating material with a maximum resistance of 105°C to make the insulation layer of the power core, and chlorinated polyethylene with a maximum resistance of 105°C The sheath material is made of the sheath layer of the power cable, the insulation tensile strength is not less than 11MPa, and the elongation at break is greater than 300%, which meets the requirements of the high-capacity torsion-resistant cable for offshore wind turbines under normal working conditions (working temperature -40°C) ~+105℃) various power transmission and service performance, solve the problem of long-term high current carrying capacity, bending fatigue, aging, tearing, etc. of the anti-torsion power cable of 8MW offshore wind turbines, which lead to the decrease of service life

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