An online monitoring device for fault gas in transformer oil based on optical fiber enhancement

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

CN109781707BActive Publication Date: 2022-05-06CHONGQING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-05-06

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Abstract

An on-line monitoring device for fault gas in transformer oil based on fiber optic enhancement, including a laser, a laser beam expander, a dichroic mirror, a spatial filter, a coupler, a kagome bandgap photonic crystal fiber modified with nanoscale holes, and a spectrometer The laser is emitted by the laser, amplified by the laser beam expander, and after the dichroic mirror, the coupler couples the laser to the kagome bandgap photonic crystal fiber modified by the nanoscale hole wherein, the nanoscale hole-modified kagome bandgap photonic crystal fiber is placed in transformer oil, and the Raman scattered light and laser signals conducted by the kagome bandgap photonic crystal fiber return to the dichroic mirror, After passing through the spatial filter, it is finally collected by the CCD of the spectrometer. The on-line monitoring device for faulty gas in transformer oil based on optical fiber enhancement of the present invention does not need manual oil-gas separation, has high accuracy, is easy to operate, and can directly detect faulty gas in transformer oil in situ.
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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...

Examples

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] Such as 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...