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Method utilizing optical fiber composite overhead ground wire redundant cable to solve cross sensitivity existing in optical fiber Brillouin scattering monitoring

A technology of Brillouin scattering and overhead ground wire, which is applied in the direction of using optical devices, measuring devices, measuring heat, etc., and can solve problems such as temperature and strain cross-sensitivity

Inactive Publication Date: 2013-09-25
YUN NAN ELECTRIC TEST & RES INST GRP CO LTD ELECTRIC INST +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of cross-sensitivity of temperature and strain when using optical fiber Brillouin scattering sensing technology to monitor the state of OPGW
Use the remaining OPGW cable on the power tower for temperature compensation to solve the temperature and strain cross-sensitivity problem of the existing optical fiber Brillouin scattering sensing technology, so as to demodulate the temperature and strain information along the OPGW. Monitor the two parameters of temperature and strain to reflect the operating status of OPGW

Method used

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  • Method utilizing optical fiber composite overhead ground wire redundant cable to solve cross sensitivity existing in optical fiber Brillouin scattering monitoring
  • Method utilizing optical fiber composite overhead ground wire redundant cable to solve cross sensitivity existing in optical fiber Brillouin scattering monitoring
  • Method utilizing optical fiber composite overhead ground wire redundant cable to solve cross sensitivity existing in optical fiber Brillouin scattering monitoring

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Embodiment 1

[0036] In the present invention, an OPGW connection box is provided on a part of the corner tower or the tension tower of the power transmission line, and a section of OPGW optical cable is arranged at the connection box. During monitoring, only temperature changes will cause Brillouin scattering frequency shift, and stress factors such as icing and wind will not cause Brillouin scattering frequency shift. This section of OPGW optical cable is named as OPGW remaining cable.

[0037] When the present invention uses Brillouin scattering sensing technology to monitor the state of the OPGW, the remaining OPGW cables on the power tower are only affected by temperature, and are used for temperature compensation of the monitoring results of the overhead OPGW, and the temperature and strain of the overhead OPGW are demodulated. parameters.

[0038] The invention uses the Brillouin scattering sensing technology to monitor the two parameters of temperature and strain along the OPGW to r...

Embodiment 2

[0041] Such as figure 2 As shown, the BOTDR is placed in the substation and connected to an OPGW fiber core. According to the formulas (3) and (4), the temperature and strain of the OPGW can be monitored, which can reflect the operating status of the OPGW.

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Abstract

The invention provides a method utilizing an OPGW redundant cable to solve cross sensitivity existing in optical fiber Brillouin scattering monitoring, and belongs to the technical field of photoelectronic measurement. An optical fiber Brillouin scattering demodulation analyzer is connected with the optical fiber core of an OPGW. Only temperature changes can cause the Brillouin scattering frequency shift of the OPGW redundant cable on an electric power iron tower, and ice accretion, wind blowing and other external stress factors cannot cause the Brillouin scattering frequency shift. Temperature compensation is carried out on a Brillouin scattering monitor technology through the OPGW redundant cable, the temperature and strain information of the overhead OPGW is demodulated out, the running state of the OPGW is reflected through the temperature and strain information of the OPGW, and the failure point of the OPGW is located through a Brillouin scattering sensor technology. The temperature complementation is carried out by utilizing the OPGW redundant cable on the electric power iron tower, the temperature and the strain along the OPGW are monitored, and the on-line monitor of the running state of the OPGW can be achieved.

Description

technical field [0001] The invention relates to a method for solving the cross-sensitivity existing in optical fiber Brillouin scattering monitoring by using OPGW (Optical Fiber Composite Overhead Ground Wire), (optical fiber composite overhead ground wire) residual cable, which belongs to the field of optoelectronic measurement technology. Background technique [0002] OPGW puts the optical fiber in the ground wire of the high-voltage overhead transmission line to form the optical fiber communication network on the transmission line. This structure has the dual functions of power transmission and communication. In recent years, OPGW has laid more than 2,000 kilometers every year. An important development direction of optical cable. The operating status of OPGW is directly related to the safety of the high-voltage overhead transmission line itself and the communication system of the power grid. However, due to icing, breeze vibration, galloping, lightning strikes, short circ...

Claims

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Application Information

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IPC IPC(8): G01K11/32G01B11/16G01K11/322
Inventor 杨洪磊梁仕斌曹敏薛俊华王宽
Owner YUN NAN ELECTRIC TEST & RES INST GRP CO LTD ELECTRIC INST
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