Gas decomposer evaluation method based on wavelet analysis

A gas decomposition product and wavelet analysis technology, applied in the direction of analyzing materials, measuring devices, instruments, etc., can solve problems such as large limitations

Inactive Publication Date: 2020-06-05
XIAN UNIV OF TECH
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for evaluating gas decomposition products based on wavelet analysis, which solves the problem of large limitations in the evaluation methods for gas decomposition products of power equipment in the prior art

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  • Gas decomposer evaluation method based on wavelet analysis
  • Gas decomposer evaluation method based on wavelet analysis
  • Gas decomposer evaluation method based on wavelet analysis

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Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] A method for evaluating gas decomposition products based on wavelet analysis in the present invention, the flow chart is as follows figure 1 As shown, the specific steps are as follows:

[0037] Step 1. Collect the concentration signals of gas decomposition products in the power equipment detected by sensors at different times, identify different gas decomposition products, and store them in the database according to the gas types;

[0038] The sensor in step 1 is a submicron film sensor.

[0039] The gas to be identified in step 1 is SF 6 Alternative gases and decomposition products containing fluorine atoms and including CO 2 , dry air, O 2 In the mixture of background gas, the discrete wavelet decomposition is performed on the sensor response signal f(t) of different gas decomposition products at different times to obtain the wa...

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Abstract

The invention discloses a gas decomposer evaluation method based on wavelet analysis, which is specifically implemented according to the following steps: 1, acquiring concentration signals of gas decomposers in power equipment detected by sensors at different moments, identifying different gas decomposers, and storing the different gas decomposers into a database according to gas types; 2, utilizing wavelet packet analysis to extract feature vectors; 3, normalizing the feature vectors to obtain normalized feature vectors; and 4, performing state evaluation and fault diagnosis by using a BP neural network. According to the invention, the problem of great limitation of a power equipment gas decomposition product evaluation method in the prior art is solved.

Description

technical field [0001] The invention belongs to the technical field of fault diagnosis, and in particular relates to a method for evaluating gas decomposition products based on wavelet analysis. Background technique [0002] At present, the vast majority of electrical equipment uses SF6 as an arc extinguishing and insulating medium, which plays a very important role in the power industry. SF6 replaces gas, which is very active in alleviating global warming and ensuring the health of power practitioners. It has great environmental and social benefits. At present, the main researched SF6 substitute gases can be divided into the following four types: conventional gases (N2, Air, CO2, etc.), SF6 mixed gases (SF6+N2, SF6+CF4, SF6+O2, etc.), strongly electronegative gases (CF3I , c-C4F8, C3F8, etc.) and their mixed gases, new synthetic environmentally friendly gases (C4F7N and C5F10O) and their mixed gases, etc. [0003] Studies have shown that there is a certain relationship be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00G01R31/00G08C17/02
CPCG01N33/0034G01N33/0067G01N2033/0068G01R31/00G08C17/02
Inventor 付钰伟李星迪伍文俊
Owner XIAN UNIV OF TECH
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