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High-voltage cable temperature measurement device and method based on single-ended BOTDA (Brilouin Optical Timedomain Analysis) of super-continuum light source

A supercontinuum light source, high-voltage cable technology, applied in measuring devices, thermometers with physical/chemical changes, thermometers, etc. high effect

Inactive Publication Date: 2019-09-17
TAIYUAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, it avoids the limitation problem that the double-ended BOTDA sensing system cannot work normally when there is a break in the optical fiber

Method used

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  • High-voltage cable temperature measurement device and method based on single-ended BOTDA (Brilouin Optical Timedomain Analysis) of super-continuum light source
  • High-voltage cable temperature measurement device and method based on single-ended BOTDA (Brilouin Optical Timedomain Analysis) of super-continuum light source

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Embodiment Construction

[0029] A high-voltage cable temperature measurement device based on a supercontinuum light source single-ended BOTDA includes a supercontinuum light source 1, a first tunable optical filter 2, a 1×2 first fiber coupler 3, a first polarization controller 4, a first high-speed Electro-optic modulator 5, microwave signal source 6, first optical amplifier 7, 2×1 fiber coupler 8, optical circulator 9, sensing fiber 10, fiber optic mirror 11, second polarization controller 12, second high-speed electro-optic modulator 13, pulse generator 14, 1×2 second fiber coupler 15, second optical amplifier 16, third optical amplifier 17, 1×2 third fiber coupler 18, second tunable optical filter 19, The third tunable optical filter 20, the first photodetector 21, the second photodetector 22, the third photodetector 23, the data acquisition card 24, the computer 25, the high voltage cable 26;

[0030] Wherein, the outgoing end of supercontinuum light source 1 is connected with the incident end of...

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Abstract

The invention relates to a high-voltage cable temperature measurement device and method based on single-ended BOTDA (Brilouin Optical Timedomain Analysis) of a super-continuum light source. Conventional high-voltage cable temperature measurement cannot ensure effective measurement on a sensing distance and a monitoring blind point; the high-voltage cable temperature measurement device and method are based on single-ended BOTDA of super-continuum, so that a problem of a breaking point cannot be measured in double-ended BOTDA can be effectively avoided; moreover, the super-continuum light source is used as a laser source, has an ultra-wide spectrum and sufficient output power and can achieve the monitoring ability of an ultrahigh spatial resolution and an ultra-long detection distance. A system has a high spatial resolution and solves a problem of real-time temperature accurate monitoring of a high-voltage cable. The device disclosed by the invention comprises the super-continuum light source, three tunable optical fibers, three 1x2 optical fiber couplers, two polarization controllers, two high-speed electrooptical modulators, a microwave signal source, three optical amplifiers, a 2x1 optical fiber coupler, an optical circulator, a sensing optical fiber, an optical fiber reflector, a pulse generator, three photoelectric detectors, a data acquisition card, a computer and the high-voltage cable.

Description

technical field [0001] The invention is applied to the field of high-voltage cable temperature measurement, specifically a high-voltage cable temperature measurement device and method based on a supercontinuum light source single-ended BOTDA, using the backward Rayleigh scattering and stimulated Brillouin scattering of the supercontinuum light source in the optical fiber Effect, it can realize high-spatial resolution and long-distance continuous measurement of high-voltage cable temperature. Background technique [0002] High voltage cable is a kind of power cable, its transmission voltage range is 1kv-1000kv, and it is used in power transmission and distribution. With the increase of power, the high-voltage cable is under the overload operation state for a long time, which causes the cable to generate a lot of heat, which makes the temperature of the core rise, the cable expands when heated, and the insulation layer will accelerate aging in a high-temperature environment, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32G01K11/322
CPCG01K11/32G01K11/322
Inventor 张建忠张晓程张明江原建明燕建军孔飞飞孟亮司凯龙
Owner TAIYUAN UNIV OF TECH
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