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Submarine cable fault alarm and diagnosis method based on distributed optical fiber temperature strain and vibration monitoring data

A distributed optical fiber and vibration monitoring technology, applied in the direction of fault location, etc., can solve the problems of high false alarm rate, false alarm of submarine cable fault alarm, and inability to perform fault diagnosis, etc. Effect of Accuracy Alarm

Active Publication Date: 2021-06-18
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to propose a submarine cable fault alarm and diagnosis method based on distributed optical fiber temperature strain and vibration monitoring data, which is used to solve the problems of false alarm and false alarm rate of submarine cable fault alarm and failure to perform fault diagnosis

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  • Submarine cable fault alarm and diagnosis method based on distributed optical fiber temperature strain and vibration monitoring data
  • Submarine cable fault alarm and diagnosis method based on distributed optical fiber temperature strain and vibration monitoring data
  • Submarine cable fault alarm and diagnosis method based on distributed optical fiber temperature strain and vibration monitoring data

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Embodiment Construction

[0031] The flow chart of the submarine cable fault alarm and diagnosis method based on distributed optical fiber temperature strain and vibration monitoring data provided by the present invention is as follows figure 1 shown. The temperature monitoring data is measured by the Raman optical time domain reflectometer based on the principle of optical fiber Raman scattering, the strain monitoring data is obtained by the Brillouin optical time domain analyzer based on the principle of optical fiber Brillouin scattering, and the vibration monitoring data is obtained by the optical fiber based It is measured by Rayleigh coherence detector based on Rayleigh coherence principle.

[0032] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0033] 1. According to the order of temperature, strain and vibration, respectively detect the current monitoring data of the three physical quantities to judge whether there is a characte...

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Abstract

The invention discloses a submarine cable state monitoring technical field, in particular to a submarine cable fault alarm and diagnosis method based on distributed optical fiber temperature strain and vibration monitoring data. This method diagnoses the fault of sensing fiber breakage according to the characteristic values ​​of distributed optical fiber temperature, strain and vibration data; the noise reduction processing of the monitoring data is carried out by moving average, and the difference between the real-time monitoring data and the reference data when there is no fault is carried out. Normalization; set the alarm thresholds of temperature, strain and vibration data respectively, perform fault alarm, locate and determine the abnormal area; by calculating the average value of the data in the abnormal area, and by analyzing the statistics and distribution rules of the data greater than the average value, the leakage current can be realized , short circuit, insulation breakdown, anchor smash, hook, anchor and other fault diagnosis. The invention solves the problem of high rate of false alarm and false negative when using the distributed optical fiber sensing technology to monitor the state of the submarine cable, and has the advantages of high alarm accuracy and the ability to realize fault diagnosis and the like.

Description

technical field [0001] The invention belongs to the technical field of submarine cable state monitoring, in particular to a submarine cable fault alarm and diagnosis method based on distributed optical fiber temperature strain and vibration monitoring data. Background technique [0002] Submarine cables are an indispensable power lifeline for coastal island power supply, offshore wind power plant power transmission, and oil platform power consumption. Their safe and stable operation is related to the social economy and people's lives. Effective submarine cable status monitoring is very necessary. Over the years, submarine cables have been lacking effective online monitoring methods, and are generally maintained through power outage maintenance and emergency repairs, which are simple and ineffective. [0003] With the development of distributed optical fiber sensing technology, the use of composite optical fibers in submarine cables to monitor the temperature, strain and vibr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
Inventor 吕安强李静
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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