Flat Conductor for the High Voltage Direct Current Connection of Off-Shore-Wind Parks

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This patent describes a flat conductor specifically designed for high voltage direct current (HVDC) connections between offshore wind parks and shore-based power stations. The conductor consists of a steel core for mechanical strength, coated with a layer of pure copper for electrical conductivity, and is insulated with robust materials like Teflon and PVC to withstand harsh underwater conditions. The invention also details an improved, efficient method for producing, connecting, and repairing these flat conductors, allowing for more reliable and cost-effective long-distance energy transmission under the sea.

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• Transmission of electricity from offshore wind parks to mainland power grids via submarine cables.
• Long-distance high voltage direct current transmission in underwater or harsh marine environments.
• Replacement or repair of existing submarine cables for renewable energy infrastructure.
• Installation of transmission lines in environments with high mechanical or corrosion risks, such as the North Sea or deepwater settings.
• Energy export from remote or off-grid renewable sources like island wind farms.

BenefitsContent extracted from patent full text and abstract with AI.

• Improved mechanical strength and durability due to the steel core and robust insulation.
• High electrical efficiency and low transmission losses with the combination of copper conductors and flat design (about 3% loss over 60 km).
• Resistance to corrosion and high voltage breakdown in saline (seawater) environments because of Teflon and PVC insulation.
• Simplified and lower-cost manufacturing, transportation, and installation compared to traditional round cable systems.
• Easy and fast connection and repair, even at sea, thanks to the modular flat design and efficient joining method.
• Enhanced safety and environmental compatibility due to minimal external fields, better cooling by seawater, and full recyclability of materials.
• Adaptable for use in deep-sea or high-pressure environments (up to 300 bar), making it suitable for a wide range of offshore projects.

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Patent Abstract

The invention relates to a flat conductor (1') for the high voltage direct current connection of off-shore-wind parks, comprising at least one component combination with a first component (1, 11) comprising a steel material, and a second component (2, 6, 13) comprising elementary copper, wherein the first component (1, 11) and the second component (2, 6, 13) are positively connected to one another. The invention also relates to a method for producing the flat conductor and to an energy transmission system having at least two flat conductors.