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Method and device for positioning fiber composite overhead ground wire

An overhead ground wire and optical fiber composite technology, applied in directions such as fault locations, can solve the problem of low positioning accuracy, and achieve the effect of solving low geolocation accuracy

Active Publication Date: 2017-07-28
WUHAN KPCQ SOFTWARE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects in the prior art, the present invention provides a positioning method and device for optical fiber composite overhead ground wire, which solves the problem of low positioning accuracy of existing positioning methods, corrects positioning errors caused by line reconstruction in real time, and enhances distributed light Application Effect of Sensing Technology in Condition Monitoring of Overhead Transmission Lines

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  • Method and device for positioning fiber composite overhead ground wire
  • Method and device for positioning fiber composite overhead ground wire
  • Method and device for positioning fiber composite overhead ground wire

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Effect test

Embodiment 1

[0055] Embodiment 1 of the present invention proposes a method for real-time geographic positioning of optical fibers inside optical fiber composite overhead ground wires, such as figure 1 shown, including the following steps:

[0056] S11. Using a Brillouin optical time domain reflectometer to collect in real time the Brillouin frequency shift signal of the optical fiber inside the optical fiber composite overhead ground wire.

[0057] Connect the Brillouin optical time domain reflectometer to an optical fiber inside the optical fiber composite overhead ground wire on the transmission line, and collect the distributed measurement points of the connected optical fiber through the Brillouin optical time domain reflectometer.

[0058] The current distributed optical sensing technology mostly uses Sagnac interference ring structure or Mach-Zehnder (M-Z) interference structure to achieve positioning, which cannot meet the needs of high-precision and long-distance detection at the ...

Embodiment 2

[0075] Embodiment 2 of the present invention proposes a real-time geographic positioning device for the optical fiber inside the optical fiber composite overhead ground wire, such as image 3 As shown, the device includes:

[0076] S21, using the Brillouin optical time domain reflectometer to collect the Brillouin frequency shift signal of the optical fiber inside the optical fiber composite overhead ground wire in real time;

[0077] S22. Preprocessing the Brillouin frequency shift signal to obtain a data sequence arranged sequentially along the optical fiber distributed measuring points;

[0078] S23. Extract feature positioning data from the data sequence;

[0079] S24. Determine the geographical position of each tower on the transmission line on the measurement optical fiber according to the characteristic positioning data;

[0080] S25. According to the geographic location of the tower on the measurement optical fiber, combined with the geographic coordinates of the tow...

Embodiment 3

[0084] Embodiment 3 of the present invention proposes a real-time geographic positioning device for the optical fiber inside the optical fiber composite overhead ground wire, such as Figure 4 As shown, the device includes:

[0085] The collection module 101 is configured to use a Brillouin optical time domain reflectometer to collect in real time the Brillouin frequency shift signal of the optical fiber inside the optical fiber composite overhead ground wire.

[0086] The preprocessing module 102 is configured to preprocess the Brillouin frequency shift signal to obtain a data sequence sequentially arranged along the optical fiber distributed measuring points.

[0087] The feature extraction module 103 is configured to extract feature positioning data from the data sequence.

[0088] The tower positioning module 104 is configured to determine the geographical position of each tower on the transmission line on the measurement optical fiber according to the characteristic posi...

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Abstract

The invention proposes a method for positioning a fiber composite overhead ground wire. The method comprises: using a Brillouin optical time domain reflectometer to acquire the Brillouin frequency shift signal inside the fiber composite overhead ground wire in real time; pre-processing the Brillouin frequency shift signal to obtain the data sequence of the fiber distribution type measuring spots rowed along the wire sequence; extracting from the data sequence the characteristics positioning data; based on the characteristics positioning data, determining the geographical positions of various rod towers of the power transmission line on the measuring fiber; and according to the geographical positions of the rod towers on the measuring fiber and in combination with the geographical coordinates of the rod towers in the line parameters, determining the real time geographical coordinates of the fiber distribution type measuring spots. The invention further proposes a device for positioning the fiber composite overhead ground wire. With the method, high positioning accuracy is achieved and real time monitoring of the geographical position information of the overhead ground wire becomes possible.

Description

technical field [0001] The invention belongs to the technical field of intelligent state monitoring of power systems, and in particular relates to a positioning method and device for optical fiber composite overhead ground wires. Background technique [0002] Distributed optical sensing technology is a sensing technology that uses optical fiber as the sensing element and signal transmission medium. It can realize the status change monitoring of distributed measuring points along the optical fiber. It is widely used in power transmission lines, oil pipelines, etc. , The field of large-scale distributed monitoring. [0003] As a main application field of distributed optical sensing technology, status monitoring of overhead transmission lines can realize status monitoring along overhead transmission lines by connecting an optical fiber inside the optical fiber composite overhead ground wire on the transmission line. Since the overhead transmission line is usually long, under t...

Claims

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Application Information

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IPC IPC(8): G01R31/08
Inventor 张坤张哲民杨帆
Owner WUHAN KPCQ SOFTWARE TECH