Method and device for improving power optical fiber state monitoring precision and storage medium

A state monitoring device and power optical fiber technology, applied in the direction of measuring devices, instruments, etc., can solve the problems of insufficient monitoring accuracy of long-distance electric optical fiber, and achieve the effects of solving insufficient monitoring accuracy, reducing measurement time, and low cost

Active Publication Date: 2021-07-16
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the embodiments of the present invention provide a method, device and storage medium for improving the monitoring accuracy of po

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  • Method and device for improving power optical fiber state monitoring precision and storage medium
  • Method and device for improving power optical fiber state monitoring precision and storage medium
  • Method and device for improving power optical fiber state monitoring precision and storage medium

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Embodiment 1

[0031] An embodiment of the present invention provides a method for improving the accuracy of power fiber state monitoring, wherein the method is applied to a power fiber state monitoring device, and the power fiber state monitoring device can be based on a coherent detection optical time domain reflectometer or based on Rayleigh scattering and Deep scattering power fiber multi-parameter state monitoring device, such as figure 1 As shown, the method includes the following steps:

[0032] Step S101: Divide the preset frequency scanning range to obtain multiple scanning frequencies.

[0033] In one embodiment, in order to improve the monitoring accuracy of the power optical fiber state, it can be based on the frequency scanning method; first, the preset frequency scanning range F is set according to the parameters of the light source in the monitoring device [f min ,f max ]; The specific frequency scanning range is mainly determined by the performance of the light source. For ...

Embodiment 2

[0049] Embodiments of the present invention provide a method for improving the accuracy of power optical fiber status monitoring for optical time domain reflectometry based on coherent detection, such as figure 2 As shown, it can be controlled by the control software in the reflectometer and its realization can be realized according to the following steps:

[0050] Step 201: Set the optical frequency scanning range F[f min ,f max ], for example, when the external cavity semiconductor narrow linewidth laser of RIO Company is selected as the sensing light source, the frequency scanning range F is between 25MHz and 250MHz, and F is divided based on the Gaussian distribution to obtain n different frequency scanning ranges Interval Δf[Δf 1 ,Δf 2 ,…Δf n ].

[0051] Step 202: Control the current and temperature of the laser, thereby changing the output beam frequency to f min , through the coupler OC 1 It is divided into two channels for transmission, one of which is used as ...

Embodiment 3

[0058] Embodiments of the present invention provide a method for improving the accuracy of power fiber state monitoring when used in a power fiber multi-parameter state monitoring device based on Rayleigh scattering and Brillouin scattering, such as Figure 4 As shown, it can be achieved by following the steps below:

[0059] Step 301: Set the frequency scanning range F[f in the control software of the power fiber multi-parameter state monitoring device min ,f max ], divide F based on Gaussian distribution, and obtain n unequal frequency scanning range intervals Δf[Δf 1 ,Δf 2 ,…Δf n ].

[0060] Step 302: Using the laser / modulator integrated platform as the modulation light source, controlling the frequency and pulse width of the probe light output by the laser / modulator, and adjusting the frequency to f min , which is divided into two paths through the coupler for transmission, one path is used as the probe light, coupled into the monitored long-distance power optical fib...

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Abstract

The invention discloses a method and device for improving power optical fiber state monitoring precision and a storage medium, and the method comprises the steps: dividing a preset frequency scanning range, and obtaining a plurality of scanning frequencies; controlling a light source in the monitoring device to output a light beam according to any one of a plurality of scanning frequencies, and monitoring the state of the power optical fiber; controlling the monitoring device to carry out measurement for preset times to obtain a plurality of measurement values; changing the frequency of the light beam output by the light source according to the plurality of scanning frequencies, and measuring the prediction times again until the measurement results under the plurality of scanning frequencies are obtained; and processing the measurement results under the plurality of scanning frequencies to obtain multi-parameter monitoring data of the power optical fiber. According to the invention, the measurement precision can be effectively improved. Therefore, the method for improving the monitoring precision of the power optical fiber state can be used for monitoring the state of the long-distance power optical fiber, and the problem that the monitoring precision of the long-distance power optical fiber is insufficient is solved.

Description

technical field [0001] The invention relates to the technical field of electric optical fiber sensing, in particular to a method, device and storage medium for improving the monitoring accuracy of electric optical fiber status. Background technique [0002] On-line monitoring of transmission lines is very important for the safe and stable operation of power grids. At present, the main technical method for on-line monitoring of transmission lines is to use sensors based on electrical signals, such as wire icing, temperature, micro weather, breeze vibration, leakage current, tower tilt, etc., and transmit data back through wireless networks. However, the operating environment of transmission lines is complex, and there are inevitably technical problems such as electromagnetic interference in the perception and transmission of electrical signals, and the traffic and communication in some areas are relatively lagging, which limits the popularization and application of online sta...

Claims

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Application Information

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IPC IPC(8): G01D21/02
CPCG01D21/02
Inventor 梁云黄莉张梓平肖靖峰崔力民周文婷王瑶张志峰孙晓艳郭经红
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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