Oil-paper insulation aging diagnosis method based on insulating oil Raman spectrum wavelet packet energy entropy

A technology of Raman spectroscopy and oil-paper insulation, which is applied in the direction of using optical methods for testing, Raman scattering, material excitation analysis, etc., and can solve problems such as extra-column effects, difficult elution, and interference

Active Publication Date: 2017-06-23
陈伟根 +1
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Problems solved by technology

The degree of polymerization and tensile strength among the physical and chemical parameters can best reflect the aging strength of oil-paper insulation. However, when measuring, it is necessary to suspend the power of the transformer and take samples from several most representative parts of the winding. damage to insulation
The electrical performance parameters mainly refer to the threshold values ​​of single characteristic parameters such as gas analysis in insulating oil and the content of furfural, methanol and acetone. The detection effect of the spectroscopic method is unstable and is easily interfered by organic matter in the oil. The colorimetric method is not only unsatisfactory, but also the toluidine used in th...

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  • Oil-paper insulation aging diagnosis method based on insulating oil Raman spectrum wavelet packet energy entropy
  • Oil-paper insulation aging diagnosis method based on insulating oil Raman spectrum wavelet packet energy entropy
  • Oil-paper insulation aging diagnosis method based on insulating oil Raman spectrum wavelet packet energy entropy

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Embodiment 1

[0057] In this embodiment, the data of oil-paper insulation standard oil samples in different aging states configured by the State Key Laboratory of Power Transmission and Distribution Equipment and System Safety and New Technology of Chongqing University were collected. After eliminating redundant samples and singular value data, 280 groups were finally selected ( 210 sets of training samples, 70 sets of test samples) corresponding to the Raman spectrum data of different aging stages of oil-paper insulation equipment were studied.

[0058] For the Raman spectral data of 280 sets of samples, the cubic spline function was used to remove the baseline and the five-point cubic smoothing algorithm was used to reduce the spectral noise, and the data were normalized.

[0059] The principal component analysis method is used to extract spectral feature information, and the principle of maximum variance is used to linearly fit multiple independent variables contained in spectral data, so...

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Abstract

The invention, which belongs to the field of electrical equipment safety assessment, particular relates to an oil-paper insulation aging diagnosis method based on an insulating oil Raman spectrum wavelet packet energy entropy. According to the method, an insulating oil Raman spectrum wavelet packet energy entropy is used as an aging characteristic quantity; an aging diagnosis model that is obtained by combining a Kennard-Stone algorithm, multi-class support vector machine construction, optimization based on a genetic algorithm is used to realize an overall aging state diagnosis of field oil-paper insulating equipment rapidly and effectively. Therefore, a quantitative analysis of dissolve aging characteristic concentration in a certain kind of oil is not needed and the fault-tolerant performance is good. The method has the good growth. An oil-paper insulating sample obtained in the field operating transformer can be used for expanding a sample base of the diagnosis model in work in future, so that the diagnosis model can be improved and corrected continuously and thus the operation and maintenance level of the oil-paper insulation equipment can be improved.

Description

technical field [0001] The invention belongs to the field of electric equipment safety state evaluation, and relates to a transformer aging diagnosis method, in particular to an oil-paper insulation aging diagnosis method based on the energy entropy of insulating oil Raman spectrum wavelet packets. Background technique [0002] On-site rapid diagnosis of the aging state of oil-paper insulation equipment is the key to improving equipment operation safety and preventing major accidents, and is of great significance to ensuring power system operation safety. At present, the existing methods for diagnosing the aging state of oil-paper insulation mainly evaluate the changes in physical and chemical parameters and electrical performance parameters caused by insulation aging. The degree of polymerization and tensile strength among the physical and chemical parameters can best reflect the aging strength of oil-paper insulation. However, when measuring, it is necessary to suspend the...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01N21/65
CPCG01N21/65G01R31/1218
Inventor 陈伟根邹经鑫万福范舟李剑王有元杜林周湶王飞鹏黄正勇
Owner 陈伟根
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