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A botdr-based method for analyzing the cause of core breakage of OPGW optical cable and its precise location method

A technology of precise positioning and cause analysis, applied in the direction of fault location, optical instrument test, machine/structural component test, etc., can solve the problem that the position of broken core cannot correspond to the specific position of the line, so as to reduce the processing time and improve the response speed Effect

Active Publication Date: 2022-06-07
董永康
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a BOTDR-based method for analyzing the cause of broken cores of OPGW optical cables and a precise positioning method to solve the problem that the existing OTDR technology cannot quickly and accurately match the position of the broken core with the specific position of the line

Method used

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  • A botdr-based method for analyzing the cause of core breakage of OPGW optical cable and its precise location method
  • A botdr-based method for analyzing the cause of core breakage of OPGW optical cable and its precise location method
  • A botdr-based method for analyzing the cause of core breakage of OPGW optical cable and its precise location method

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specific Embodiment approach

[0034] Specific implementation: as figure 1 and figure 2 As shown in this embodiment, a BOTDR technology-based OPGW fiber optic cable breakage cause analysis and precise positioning method, the overall structure is as follows figure 2 As shown, use BOTDR equipment to collect the Brillouin frequency shift information of the OPGW optical cable, and observe the Brillouin frequency shift characteristics of the remaining intact fiber cores at the broken core position to determine whether the broken core position is in the splice box, and locate the broken core position to At the specific tower, the precise location of the fault point is given. The specific process is as figure 1 shown.

[0035] Step 1. Use the distributed Brillouin optical time domain reflectometer RP4000 to connect to the optical fiber distribution frame ODF of the OPGW optical cable in the substation, collect the Brillouin frequency shift curve of the faulty core of the OPGW optical cable, and calibrate the ...

Embodiment

[0041] Example: as Figure 1-Figure 9 As shown, this embodiment is based on the specific implementation manner, and more specifically: in step 1, the BOTDR device adopts a single-ended working mode, and a jumper is used to connect the BOTDR device and the ODF rack. The BOTDR collects the Brillouin frequency shift curve of the fiber core. When the fiber is broken somewhere, it does not affect the signal measurement before the breakpoint, and the position of the breakpoint can be accurately obtained.

[0042] BOTDR equipment is used to monitor the stress of OPGW cables, such as image 3 As shown, areas C1, C2, C3, C4, C5 are the measured force areas. In this example, the OPGW optical cable in the Huoshan-Chunqiutang direction is tested, with a total length of 64.45km and two broken cores. This section of optical cable is located in a complex terrain, has been in operation for more than 15 years, and belongs to a heavily ice-covered area. Faults occur frequently. The 12# and 13...

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Abstract

The invention discloses a BOTDR technology-based analysis and precise positioning method for the broken core of an OPGW optical cable, which belongs to the field of broken core detection of the OPGW optical cable. It solves the problem that the existing OTDR technology cannot quickly and accurately correspond the position of the broken core to the specific position of the line. Technical points: use the distributed Brillouin optical time domain reflectometer to connect to the optical fiber distribution frame of the OPGW optical cable in the substation, collect the Brillouin frequency shift curve of the faulty fiber core of the OPGW optical cable, and calibrate the length of the optical fiber at the broken core; The Brillouin frequency shift curve of the intact fiber core; draw and generate the Brillouin frequency shift curve; draw the real-scale tower path diagram according to the line information; mark the position of the Brillouin frequency shift mutation, and compare the tower path diagram with the layout Corresponding to the Brillouin frequency shift position, mark the exact length of the optical fiber at the connection tower; determine whether the broken core position is at the Brillouin frequency shift jump. The invention is used in the detection of broken cores of OPGW optical cables.

Description

technical field [0001] The invention relates to a method for analyzing and accurately locating a broken core of an optical cable, in particular to a method for analyzing and accurately locating a broken core of an OPGW optical cable based on the BOTDR technology, and belongs to the field of broken core detection of an OPGW optical cable. Background technique [0002] Optical Fiber Composite Overhead Ground Wire (OPGW, Optical Fiber Composite Overhead Ground Wire) has the dual functions of ground wire and communication line, and is widely used in high-voltage overhead transmission lines. During the long-term operation of the OPGW optical cable, the core of the OPGW optical cable is broken due to factors such as thermal expansion and contraction and aging of materials, construction technology, external force damage, lightning strike and icing, etc., which affects the reliable operation of the power communication network and fast and accurate positioning. The position of the br...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08G01M11/00G01D5/353
CPCG01R31/086G01M11/00G01D5/35312
Inventor 董永康夏猛汤晓惠杜学新杨芳
Owner 董永康