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Laser switching method and system applied to multi-component detection of SF6 decomposition products

A decomposition product and laser switching technology, which is applied in the field of laser switching methods and systems, can solve the problems of single decomposition product, single detection object, and low fault tolerance rate, and achieve fast response, high degree of integration and automation, and low cost. Effect

Pending Publication Date: 2019-09-03
JIANGSU ELECTRIC POWER CO +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the current traditional laser absorption spectroscopy technology uses lasers for detection, and the detection object is single
SF 6 Early latent insulation faults inside electrical equipment are often accompanied by the generation of multiple decomposition products. Using existing laser detection devices to detect only one of the decomposition products, the decomposition products that can be detected are single, and the fault tolerance rate is low.

Method used

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  • Laser switching method and system applied to multi-component detection of SF6 decomposition products
  • Laser switching method and system applied to multi-component detection of SF6 decomposition products
  • Laser switching method and system applied to multi-component detection of SF6 decomposition products

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Embodiment 1

[0027] figure 1 An application to SF provided by Embodiment 1 of the present invention 6 Flowchart of a laser-switched method for multicomponent detection of decomposition products, which can be controlled by SF 6 Decomposition product multi-component detection system is implemented, the system includes: at least two monochromatic lasers, a light source switching module, a gas pool, a detector and a control module;

[0028] Wherein, each monochromatic laser corresponds to a gas detection band, and may include a plurality of different monochromatic lasers according to different components of the detected gas. For example, including H 2 S lasers, CO lasers and SO 2 laser, corresponding to H 2 S gas, CO gas and SO 2 gas, used to detect different SF6 decomposition products, specifically, H 2 The S laser emits the same energy as the H 2 H in the corresponding band of S gas action 2 S laser, which is a molecular laser, can be H 2 S gas absorbs, and the laser light intensity...

Embodiment 2

[0045] figure 2 A method applied to SF provided by Embodiment 2 of the present invention 6 Schematic diagram of the laser switching system for multi-component detection of decomposition products, image 3 Another application to SF provided by Embodiment 2 of the present invention 6 Schematic diagram of the structure of the laser switching system for multi-component detection of decomposition products. refer to figure 2 with image 3 , the system includes: at least two monochromatic lasers 21, a light source switching module 22, a gas pool 23, a detector 24 and a control module 25, the monochromatic laser 21, the light source switching module 22 and the detector 24 are connected to the control module 25;

[0046] The light source switching module 22 can couple the laser light emitted by any collimating mirror into the gas pool 23;

[0047] The detector 24 is used to detect the light intensity before and after the gas pool 23 passes through the laser;

[0048] The contro...

Embodiment 3

[0063] Image 6 Another application to SF provided by Embodiment 3 of the present invention 6 A schematic structural diagram of a laser switching system for multi-component detection of decomposition products. On the basis of Embodiment 2, the control module 25 specifically includes:

[0064] A laser control module 41, configured to control the laser to emit laser light;

[0065] The light source switching control module 42 is used to control the driving mechanism to drive the wheel to rotate, so as to switch the coupling between different collimating mirrors and the gas cell;

[0066] The signal collection and processing module 43 is used to collect the signal output by the detector and determine the gas composition.

[0067] In the technical solution of this embodiment, by switching different light sources, the gas components to be detected can be flexibly detected to realize SF 6 The multi-component detection of decomposition products has a fast response speed, and does ...

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Abstract

The embodiment of the invention discloses a laser switching method and system applied to multi-component detection of SF6 decomposition products. The method is carried out by the system for the multi-component detection of the SF6 decomposition products. The system comprises: at least two monochromatic lasers, a light source switching module, a gas cell, a detector and a control module, wherein each monochromatic laser is corresponding to a gas detection wave band; at least two fiber interfaces and collimating mirrors in one-to-one correspondence with the fiber interfaces are arranged on the light source switching module; and the fiber interfaces are connected to the monochrome lasers in an one-to-one correspondence manner. The method comprises the steps of: coupling lasers emitted by thecollimating mirrors into the gas cell one by one by the light source switching module; detecting the light intensity before and after the lasers passes through the gas cell by the detector; and collecting signals of the corresponding light intensity output by the detector by the control module and determining gas components in the gas cell according to the detected light intensity. The method andthe system which are disclosed by the embodiment of the invention have the beneficial effects that the switching of different light sources is carried out through the light source switching module torealize the multi-component detection of the SF6 decomposition products, so that the light sources or the gas cell are not needed to be manually switched.

Description

technical field [0001] The embodiment of the present invention relates to the field of photoelectric technology detection, in particular to a method applied to SF 6 Laser switching method and system for multi-component detection of decomposition products. Background technique [0002] SF 6 When an early latent insulation fault occurs inside electrical equipment, it is often accompanied by physical phenomena such as potential differences of different forms and intensities or local overheating, which in turn causes SF 6 Different degrees of decomposition occur, resulting in a variety of decomposition products. to SF 6 Regular inspection or online real-time monitoring of decomposition products in insulation equipment for SF 6 Potential fault diagnosis and life cycle management of insulation equipment are of great significance. [0003] In the existing technology, laser absorption spectroscopy is usually used for SF 6 For the detection of decomposition products, this metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/01
CPCG01N21/01G01N21/31G01N2021/0112
Inventor 卞超戴锋陈昊贾勇勇陶加贵李洪涛陈韬邵新苍秦延山陈轩刘咏飞马勇赵科高山杨景刚张引程宏图张晓星
Owner JIANGSU ELECTRIC POWER CO