Method for optimizing oil-paper insulation time domain dielectric response feature quantity of two-stage transformer

A technology of transformer oil and dielectric response, applied in the direction of testing dielectric strength, etc., can solve the problem of unreasonable basis for the selection of time-domain dielectric feature space, and achieve the effect of strengthening generalization ability and improving accuracy.

Active Publication Date: 2019-11-08
FUZHOU UNIV
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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to propose a two-stage transformer oil-paper insulation time-domain dielectric response feature optimization method to solve the problem that there is no reasonable basis for the time-domain dielectric feature space selection, combined with filter-type feature select

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  • Method for optimizing oil-paper insulation time domain dielectric response feature quantity of two-stage transformer
  • Method for optimizing oil-paper insulation time domain dielectric response feature quantity of two-stage transformer
  • Method for optimizing oil-paper insulation time domain dielectric response feature quantity of two-stage transformer

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[0055] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0056] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0057] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combina...

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Abstract

The invention relates to a method for optimizing the oil-paper insulation time domain dielectric response feature quantity of a two-stage transformer. The advantages of a filter type feature selectionstatistical index and random forest bag external data feature quantity importance estimation are combined, and an optimal feature space with the lowest redundancy, the highest class discrimination degree and the highest classification importance can be finally determined through two-stage feature selection. The method is used for realizing evaluation selection of the time domain dielectric spectrum feature quantity; under the condition that a traditional insulation diagnosis method adopts a similar dimensional feature space, the method can be used for obtaining more effective information, theaccuracy of insulation diagnosis is greatly improved, a new idea of selecting the feature space is provided for subsequent transformer insulation evaluation by using the multivariate time domain feature quantity, and the method has an important application value in practical engineering.

Description

technical field [0001] The invention relates to the technical field of aging evaluation of oil-paper insulation transformers, in particular to a method for optimizing the time-domain dielectric response characteristic quantity of oil-paper insulation of a two-stage transformer. Background technique [0002] The long-term operation of oil-immersed transformers will cause their insulation systems to gradually age and fail, which will affect their operating status and service life. Therefore, it is necessary to carry out effective diagnosis on the transformer insulation system periodically. In the research field of transformer oil-paper insulation diagnosis, time-domain dielectric response method, as a non-destructive testing method, can accurately reflect the relaxation characteristics of transformer insulation, and can scientifically and reliably diagnose the aging state of oil-paper insulation. The recovery voltage method (RVM) and the polarization / depolarization current me...

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/12
Inventor 刘庆珍蔡超蔡金锭
Owner FUZHOU UNIV
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