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

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.

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...

AI Technical Summary

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

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