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On-line monitoring system and monitoring method of submarine cable all-fiber temperature

A submarine cable and monitoring system technology, applied in the field of monitoring, can solve problems such as potential safety hazards and inaccurate temperature monitoring of submarine cables, and achieve the effects of avoiding maintenance equipment, avoiding accidents such as electric shock, and reducing costs

Pending Publication Date: 2020-02-14
GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of inaccurate and potential safety hazards in the existing submarine cable temperature monitoring, the present invention provides a submarine cable all-fiber temperature online monitoring system and monitoring method

Method used

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  • On-line monitoring system and monitoring method of submarine cable all-fiber temperature
  • On-line monitoring system and monitoring method of submarine cable all-fiber temperature
  • On-line monitoring system and monitoring method of submarine cable all-fiber temperature

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Embodiment

[0021] Such as figure 1 As shown, the existing submarine cable 100 is bundled with an optical cable 101 or has an optical fiber inside. In this implementation, the submarine cable 100 is bundled with the optical cable 101 through a binding band 102 . However, the submarine cable all-fiber temperature on-line monitoring system provided in this embodiment is mainly composed of three parts, namely an optical fiber current transformer 1 , a distributed optical fiber sensor 2 and an online monitoring terminal 3 .

[0022] Among them, the optical fiber current transformer 1 is used to be installed at the position of the submarine cable terminal 1001 to measure and obtain the current flowing through the submarine cable conductor; the distributed optical fiber sensor 2 is used to monitor the real-time temperature distribution of the surface of the submarine cable; the online The monitoring terminal 3 is used to receive the current parameters measured by the optical fiber current trans...

Embodiment 2

[0044] This embodiment provides a method for on-line monitoring of the temperature of all optical fibers in a submarine cable. The submarine cable is bound with an optical cable or is compounded with an optical fiber inside. The method includes:

[0045] The optical fiber sensing ring of the optical fiber current transformer is installed on the flange of the lower part of the submarine cable terminal. Before installation, the armor and lead sheath of the submarine cable have been stripped at the installation position to avoid the induction of the external metal layer. Power interference, to ensure the accuracy of detection.

[0046] Use distributed optical fiber sensors to monitor the real-time temperature distribution of the surface of the submarine cable on the bundled optical cable or the composite optical fiber of the submarine cable;

[0047] Receive the current parameters measured by the optical fiber current transformer and the real-time distribution parameters of the s...

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Abstract

The invention discloses an on-line monitoring system and monitoring method of a submarine cable all-fiber temperature. The system comprises an optical fiber current transformer, a distributed opticalfiber sensor, and an on-line monitoring terminal. The optical fiber current transformer is used for being installed at a terminal position of a submarine cable to measure a current flowing through a submarine cable conductor. The distributed optical fiber sensor is used for monitoring real-time temperature distribution on the surface of the submarine cable. The on-line monitoring terminal is usedfor receiving the current parameter measured and obtained by the optical fiber current transformer, receiving the real-time temperature distribution parameter, monitored and obtained by the distributed optical fiber sensor, of the surface of the submarine cable, displaying and outputting the real-time temperature distribution condition of the submarine cable conductor according to the two parameters. According to the invention, on-line monitoring of the temperature of the submarine cable is realized by adopting an all-fiber mode, so that a defect that the traditional transformer substation current transformer cannot accurately measure the current flowing through the submarine cable conductor is overcome and more accurate data are provided for calculation of the temperature of the submarinecable conductor.

Description

technical field [0001] The invention relates to the technical field of monitoring, in particular to an on-line monitoring system and method for all optical fiber temperature of a submarine cable. Background technique [0002] Submarine cables are laid on the seabed and are mechanically protected by burial, riprap dams, cast iron casings, etc. Therefore, it is impossible to know the operating status of submarine cables through conventional inspection methods. When the submarine cable suffers damage or insulation failure, the fault point will heat up. Therefore, monitoring the temperature along the submarine cable is very important to grasp the operating status of the submarine cable. [0003] Under normal circumstances, the temperature monitoring of the submarine cable conductor is divided into two steps: calculate the surface temperature of the submarine cable through the bundled optical fiber of the submarine cable or the internal composite optical fiber; build the heating ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32G01R15/24G01K11/322
CPCG01K11/32G01R15/24
Inventor 黄小卫李亚会吴聪郭强林道英陈奕钪刘子寰张维佳蔡驰李晓骏吴青帅陈航伟
Owner GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION
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