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Method and device for detecting vibration and sound in abnormal state of transformer

A detection method and abnormal state technology, applied to measuring devices, instruments, measuring ultrasonic/sonic/infrasonic waves, etc., can solve the problems of not getting results, being easily affected by environmental noise, etc., and achieving improved performance and good robustness , calculate the simple effect of

Inactive Publication Date: 2021-06-11
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Since the vibration-acoustic detection method utilizes the vibration signal sent by the transformer, it is easily affected by environmental noise, so this method often does not obtain satisfactory results when applied in the actual working environment.

Method used

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  • Method and device for detecting vibration and sound in abnormal state of transformer
  • Method and device for detecting vibration and sound in abnormal state of transformer
  • Method and device for detecting vibration and sound in abnormal state of transformer

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Embodiment Construction

[0025] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0027] For the convenience of description, the above devices are described by dividing their functions into various units / modules and describing them separately. Of course, when implementing the present invention, the functions of each unit / module can be implemented in one or more pieces of software and / or hardware.

[0028] Such as figure 1 As shown, it is a method for detecting abnormal state vibration of a transformer according to the present invention, including:

[0029] Step 1, for the first vibration-acousti...

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Abstract

The embodiment of the present invention discloses a method and device for detecting vibration and sound in an abnormal state of a transformer. The method includes: Step 1, for the measured first vibration and sound signal sequence P=[P 1 ,P 2 ,...,P N ], seek Fourier transform, obtain the first frequency spectrum sequence F=FFT[P]=[F 1 , F 2 ,...,F N ]; step 2, extracting the first feature value of the first spectral sequence; step 3, calculating the first feature value Γ of the first spectral sequence according to the first feature value; step 4, according to the first feature value An eigenvalue Γ and an optimal threshold to determine the operating state of the transformer.

Description

technical field [0001] The invention relates to the field of smart grids, in particular to a method and device for detecting vibration and sound in an abnormal state of a transformer. Background technique [0002] With the rapid development of smart grid, the safe and stable operation of power equipment is particularly important. At present, it is more and more important and urgent to carry out the operation state detection of the power equipment with ultra-high voltage and above voltage level, especially the detection of abnormal state. As an important part of the power system, the power transformer is one of the most important electrical equipment in the substation, and its reliable operation is related to the safety of the power grid. Generally speaking, the abnormal state of the transformer can be divided into iron core abnormality and winding abnormality. Iron core abnormality mainly manifests as iron core saturation, and winding abnormality usually includes winding d...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 翟明岳
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH