Temperature rise strain monitoring and alarming and fault analysis method for composite submarine cable

A fault analysis method and strain monitoring technology, applied in the fault location and other directions, can solve problems such as failure to locate the fault location, abnormal temperature rise of submarine cables, lack of monitoring measures for stress and deformation, and unpredictable safety status

Inactive Publication Date: 2012-08-15
SHANGHAI MARITIME UNIVERSITY +2
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Problems solved by technology

[0004] The present invention aims at the lack of monitoring measures for the abnormal temperature rise and stress deformation of the submarine cable in the prior art, its safety sta...

Method used

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  • Temperature rise strain monitoring and alarming and fault analysis method for composite submarine cable
  • Temperature rise strain monitoring and alarming and fault analysis method for composite submarine cable
  • Temperature rise strain monitoring and alarming and fault analysis method for composite submarine cable

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Embodiment Construction

[0053] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0054]The composite submarine cable includes power cables and single-mode communication optical fibers. The power cables are used for power transmission between oil production platforms, and the single-mode optical fibers realize long-distance communication. When manufacturing submarine cables, the number of communication optical fibers generally has a margin of 20%. The invention utilizes redundant single-mode optical fibers for temperature stress sensing, and evaluates the safety status of composite submarine cables in combination with power harmonic test parameters.

[0055] Based on the above principles, the specific implementation of the present invention is as follows (see figure 1 ):

[0056] 1. Obtain the physical structure size of the ...

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Abstract

The invention discloses a temperature rise strain monitoring and alarming and fault analysis method for a composite submarine cable. The method comprises the following steps of: performing real-time temperature stress sensing on the composite submarine cable by utilizing abundant single mode fibers in a submarine cable, and evaluating the safety state of the composite submarine cable according to a power supply harmonic test parameter to realize real-time monitoring of the composite submarine cable. According to the method disclosed by the invention, real-time distributive safety monitoring and alarming can be performed on the composite submarine cable, and the safety sate of the composite submarine cable is judged according to the monitored power grid quality parameter, communication optical fiber excited brillouin reflection frequency offset and calibration data; and the fault analysis is performed on the composite submarine cable having a fault to find out the main reason of the fault.

Description

technical field [0001] The invention relates to the monitoring technology of composite submarine cables, in particular to real-time and distributed safety monitoring and alarming of composite submarine cables. Make a judgment on the safety status of the cable; and conduct a fault analysis on the faulty composite submarine cable to find out the main cause of the fault. Background technique [0002] The existing submarine composite cable adopts the method of laying and burying to deal with the possible damage caused by external forces such as ship anchors and fishing gear trawls. After the submarine cable fails, use the optical fiber Brillouin scattering tester to test the communication optical fiber in the composite submarine cable to determine the failure. After the parts are repaired. [0003] At present, composite submarine cables in service only have power supply quality monitoring, and there is no detection of thermal breakdown faults caused by internal factors such as ...

Claims

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Application Information

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IPC IPC(8): G01R31/08
Inventor 安博文王新华陈元林刘进辉王晓峰高红武刘频频周蓉蓉
Owner SHANGHAI MARITIME UNIVERSITY
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