SYSTEM FOR PREVENTING DAMAGE TO POWER CABLES TO AND FROM AND IN A FLOATING SYSTEM

DE602021031216T2Inactive Publication Date: 2025-05-21APL NORWAY AS
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Patent Information

Application Number
DE602021031216
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2021-05-25
Publication Date
2025-05-21
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Non-redundant mooring systems in floating offshore wind turbines are prone to over-stressing and failure of power cables when a main mooring line fails, leading to significant repair costs and downtime, as they lack redundant load-bearing elements to absorb the stress.

Method used

A system of passive safety lines, including power cable safety lines and seabed power cable safety lines, are deployed parallel to the power cables and mooring lines, with specific lengths and breaking strengths to restrict movement and absorb loads, ensuring the power cables remain within their capacity limits even after a mooring line failure.

Benefits of technology

The passive safety lines effectively prevent damage to power cables by limiting the displacement of floating wind turbines, maintaining station-keeping ability and allowing for extended rectification time of the failed mooring system, thereby reducing repair costs and downtime.

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Abstract

The invention describes a system for preventing damage to a power cable (5) for electric power transmission to and from and within a floating offshore wind power plant using non-redundant mooring, after failure of a main loadbearing mooring element. The system comprises at least one power cable safety line (13) having the following properties: It is connected to the same two wind turbines (1) as the power cable (5) it is designed to protec. It has an effective length shorter than the power cable it is designed to protect. It has an effective length longer than what is needed to remain largely unstressed when the distance between the floating wind turbines (1) with intact mooring systems is at its maximum. It has a breaking strength being a predetermined fraction of the strength, which the main loadbearing mooring elements (4, 8, 9, 10, 11, 12, 18) are designed for.
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