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In-situ detection device for SF6 decomposition component inside GIS (Gas Insulated Switchgear) based on fiber ring resonator

A ring resonant cavity and component decomposition technology, applied in the direction of testing the dielectric strength, can solve the problems of low Raman scattering intensity, small gas Raman scattering cross-sectional area, and the minimum detection concentration of gas cannot meet the actual needs, etc., to achieve enhanced Raman scattering collection angle and laser power, effect of increasing intensity

Active Publication Date: 2019-05-17
CHONGQING UNIV
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Problems solved by technology

However, the gas Raman scattering cross-sectional area is small and the Raman scattering intensity is low, so the minimum detection concentration of gas based on Raman spectroscopy cannot meet the actual needs of GIS online monitoring

Method used

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  • In-situ detection device for SF6 decomposition component inside GIS (Gas Insulated Switchgear) based on fiber ring resonator
  • In-situ detection device for SF6 decomposition component inside GIS (Gas Insulated Switchgear) based on fiber ring resonator

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Embodiment Construction

[0032] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings; it should be understood that the preferred embodiments are only for illustrating the present invention, rather than limiting the protection scope of the present invention.

[0033] figure 1 Shown is the SF inside the GIS based on the fiber ring resonator 6 Schematic diagram of in-situ detection device for decomposed component Raman spectroscopy, including laser unit, incident light fiber coupling unit, fiber ring resonator, exit light fiber coupling unit, detection laser and Rayleigh scattered light filtering unit, spatial filtering unit, spectrum acquisition unit.

[0034] The laser unit is used to provide the light source required for detection, including a laser, a laser beam expander mirror A, and a mirror B. The laser is a solid-state laser with a power of 1.5W, which emits a laser with a wavelength of 532nm and a spot diameter of 1....

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Abstract

The invention provides an in-situ detection device for an SF6 decomposition component inside a GIS (Gas Insulated Switchgear) based on a fiber ring resonator. The device comprises a laser unit, an incident light optical fiber coupling unit, the fiber ring resonator, an emergent light optical fiber coupling unit, a detection laser, a Rayleigh scattered light filtering unit, a spatial filtering unitand a spectral acquisition unit. According to the in-situ detection device for the SF6 decomposition component inside the GIS based on the fiber ring resonator provided by the invention, the in-situdetection of gas to be tested inside the GIS is realized based on a surface-drilled hollow-core photonic bandgap fiber, the Raman scattering effective collection efficiency is improved, and the Ramanscattering signal intensity is greatly enhanced; based on the fiber ring resonant cavity, the internal laser power of the hollow-core photonic bandgap fiber is improved, and the Raman scattering signal intensity is further improved; and in addition, the in-situ detection of the SF6 decomposition component inside the GIS can be realized, and the device can be well applied to the field of SF6 decomposition component measurement inside the GIS.

Description

technical field [0001] The invention belongs to the field of on-line monitoring and fault diagnosis of electric equipment insulation, and relates to the internal SF of GIS 6 Detection of decomposed components, specifically related to a fiber-optic ring resonator-based GIS internal SF 6 Decomposition component in-situ detection device. Background technique [0002] With the development of UHV power transmission strategy, SF 6 The proportion of gas-insulated combined electrical equipment (GIS) in power equipment is increasing day by day, which puts forward higher requirements for its online monitoring technology. Due to defects in manufacturing, installation, transportation and operation, discharge and overheating faults are prone to occur inside the GIS, resulting in SF 6 The gas decomposes and produces SO 2 f 2 、SOF 2 、CF 4 , SO 2 、H 2 S, COS and CO 2 Such as characteristic gas components that reflect the type of insulation defect inside the equipment, the discharg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
Inventor 万福陈伟根王建新周峰王品一杜林谭亚雄王有元李剑黄正勇王飞鹏周湶王稼轩
Owner CHONGQING UNIV
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