Monitoring a flexible power cable

A power cable and cable technology, applied in the field of bending and straining systems, can solve problems such as increasing installation complexity and achieve low cost effects
CN101548344AInactive Publication Date: 2009-09-30ABB TECH AG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ABB TECH AG
Publication Date
2009-09-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

An offshore monitoring system, for an electrical power cable connected between a fixed point and a movable point, or for an electrical power cable connecting two movable points. The system comprises at least one optical fiber acting as a continuously distributed strain measurement sensor attached to or arranged in said power cable, a device arranged for sending optical signals and a device arranged for receiving optical signals to determine the time variant bending of said power cable.
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Description

technical field

[0001] The present invention relates to a system for monitoring the bending and strain of a power cable connected to a mobile offshore platform by measuring the strain of an optical fiber attached to or incorporated into the power cable. Background technique

[0002] Offshore installations, such as oil / gas rigs, processing platforms, semi-submersible installations, etc. are increasingly connected by power cables to onshore installations, fixed subsea installations or other offshore installations. In the case of floating rigs, power cables are subject to repeated motion and bending due to wave roll, wind pressure and / or tidal motion.

[0003] In order to withstand the movements of floating offshore installations, power cables must be somewhat flexible. However, the movement of the facility and the resulting bending of the power cables can limit the useful life of the cables. The service life of a power cable is determined not only by the number of bends it i...

Claims

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