Flexible Copper-Clad Aluminum Power Cable for Wind Turbines
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Solution Overview
Problem
The existing power cables used in wind turbines, rated for high voltages like 2000 Volts, are often rigid and costly to install due to their inflexibility, leading to high installation efforts and costs when connecting generators to transformers located at different heights within the turbine tower.
Innovation Solution
A flexible power cable with copper clad aluminum strands, a composite insulator made of ethylene propylene rubber, and a jacket of chlorinated or chlorosulfonated polyethylene, designed to meet high voltage specifications and operate in various conditions, allowing for easier installation and reduced material costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a power cable rated for 2000 volts is used to meet voltage specifications, then electrical safety is improved, but the cable becomes more rigid and installation cost increases
Solution Approach 1:
The patent applies parameter changes by modifying the cable construction parameters - using copper-clad aluminum strands instead of solid copper, and specifying particular insulation thicknesses (6-10 times the conductor diameter) and jacket thicknesses (3-6 times the conductor diameter). These parameter changes enable the cable to achieve the required 2000V rating while maintaining flexibility for installation.
Solution Approach 2:
The patent employs composite materials by using copper-clad aluminum conductors (combining copper's conductivity with aluminum's lightness and flexibility), thermosetting rubber insulation, and thermoplastic or thermosetting jacket materials. This composite approach allows the cable to meet voltage rating requirements while maintaining installation flexibility.
2Ease of operation
If a power cable with sufficient flexibility for easy installation is used, then installation cost is reduced, but the cable may not meet the required voltage rating of 2000 volts
Solution Approach 1:
The patent resolves this contradiction by establishing specific parameter ranges: insulation thickness of 6-10 times the conductor diameter and jacket thickness of 3-6 times the conductor diameter. These parameter specifications ensure the cable achieves 2000V rating while maintaining the flexibility needed for easy installation in wind turbine towers.
Solution Approach 2:
The patent applies local quality by providing different thickness ratios for different cable components - the insulation layer receives 6-10 times the conductor diameter thickness for electrical protection, while the jacket receives 3-6 times for mechanical protection. This differentiated local quality optimization allows the cable to meet voltage requirements without excessive overall thickness that would reduce flexibility.
3Reliability
If traditional copper conductors are used to ensure electrical conductivity, then electrical performance is improved, but cable weight and installation difficulty increase
Solution Approach 1:
The patent applies composite materials by using copper-clad aluminum conductors where aluminum core provides lightness and flexibility while the copper cladding ensures electrical conductivity and compatibility with standard electrical connectors. This composite conductor structure reduces cable weight compared to solid copper while maintaining required electrical performance for 2000V applications.
Solution Approach 2:
The patent changes the conductor material composition parameter from 100% copper to copper-clad aluminum, fundamentally altering the weight-to-conductivity ratio. This parameter change enables the cable to meet electrical conductivity requirements for wind turbine applications while significantly reducing weight and improving flexibility for installation.
Data Source
AI summary
A wind turbine configuration is constructed with a power cable having an electrical conductor with a plurality of copper clad aluminum strands that are highly flexible. The power cable includes a composite insulator including an insulating material surrounding the electrical conductor and a jacket surrounding the insulating material. The wind turbine configuration includes a wind turbine having a tower with a top and a bottom. A generator is located near the top of the tower, and a transformer is located outside of the wind turbine. A plurality of rotor blades is connected to the generator. The power cable electrically connects the generator of the wind turbine to the transformer. A method includes electrically connecting the power cable to a generator of the wind turbine and to a transformer conveying power supplied by the generator to a switchyard.