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On-line monitoring device for fault gas in transformer oil based on fiber enhancement

A technology for transformer oil and fault gas is applied in the field of on-line monitoring devices for fault gas in transformer oil, which can solve the problems of low dissolved gas content and low absolute scattering cross section of Raman effect, and achieve the effects of high accuracy and simple operation.

Active Publication Date: 2019-05-21
CHONGQING UNIV
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Problems solved by technology

However, due to the low content of dissolved gas in oil and the Raman effect has a low absolute scattering cross section, the Raman intensity needs to be enhanced to achieve the required reasonable detection limit

Method used

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  • On-line monitoring device for fault gas in transformer oil based on fiber enhancement
  • On-line monitoring device for fault gas in transformer oil based on fiber enhancement
  • On-line monitoring device for fault gas in transformer oil based on fiber enhancement

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Embodiment Construction

[0028] The technical solution of the present invention will be further introduced in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] like figure 1 As shown, a kind of on-line monitoring device for faulty gas in transformer oil based on optical fiber enhancement of the present invention includes a laser, a laser beam expander, a dichroic mirror, a spatial filter, a coupler, a displacement device, and a kagome bandgap photonic crystal Fiber optics, spectrometers. The laser light emitted by the laser passes through the laser beam expander, and the coupler couples the laser light into the kagome bandgap photonic crystal fiber, and the two ends of the spatial filter are respectively connected to lens A and a high-pass filter, and the The spatial filter is composed of a collimating lens, a pinhole and a focusing lens. The CCD of the spectrometer is connected to the lens A, and the lens A plays a focusing role, which is convenient for th...

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Abstract

Provided in the invention is an on-line monitoring device for fault gas in transformer oil based on fiber enhancement. The device comprises a laser, a laser beam expander, a dichroic mirror, a spatialfilter, a coupler, a nanometer-hole-modified kagome bandgap photonic crystal fiber, and a spectrometer. Laser is emitted by the laser; the laser is expanded by the laser beam expander and the expanded laser passes through the dichroic mirror; the coupler couples the laser to the nanometer-hole-modified kagome bandgap photonic crystal fiber that is arranged in transformer oil; Raman scattered light and a laser signal that are transmitted by the kagome bandgap photonic crystal fiber are returned to the dichroic mirror; the returned light and signal pass through the spatial filter; and then theprocessed light and signal are collected by a CCD of the spectrometer. According to the on-line monitoring device, no artificial oil and gas separation is needed; the accuracy is high; and the operation is simple. The fault gas in the transformer oil can be detected directly at the original position.

Description

technical field [0001] The invention belongs to the field of on-line monitoring and fault diagnosis of electric equipment insulation, and in particular relates to an on-line monitoring device for faulty gas in transformer oil based on optical fiber enhancement. Background technique [0002] The safe, stable, reliable and economical operation of the power system is one of the foundations for rapid economic development and social stability. The power transformer is a pivotal device in the power system that undertakes different levels of voltage conversion and power distribution. It plays an extremely important role in the process of power transmission, transformation, and power distribution in the power system. Its safe operation is the core of ensuring the safety and stability of the power system. . More and more large-capacity and high-grade large-scale power transformers are put into use in ultra-high voltage power grids. Once a fault occurs, it will not only damage expens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65G01N21/01
Inventor 万福陈伟根周峰陈卓正丁佳昀王子桐王建新王品一
Owner CHONGQING UNIV
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