GIS mechanical oscillation signal time frequency analysis method based on VMD adaptive morphology

A time-frequency analysis and vibration signal technology, applied in the field of signal processing, can solve problems such as lack of solutions

Inactive Publication Date: 2018-02-16
STATE GRID SHANDONG ELECTRIC POWER +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] To sum up, in the prior art, there is still a lack of effective solutions for the time-frequency analysis of GIS mechanical vibration signals

Method used

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  • GIS mechanical oscillation signal time frequency analysis method based on VMD adaptive morphology
  • GIS mechanical oscillation signal time frequency analysis method based on VMD adaptive morphology
  • GIS mechanical oscillation signal time frequency analysis method based on VMD adaptive morphology

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[0050] It should be pointed out that the following detailed description is exemplary and 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.

[0051] 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 combinations thereof.

[0052] As introduced in the background technology, there is a problem of low accuracy in the time-frequency anal...

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Abstract

The invention discloses a GIS (Gas Insulated Switchgear) mechanical oscillation signal time frequency analysis method based on VMD (Variational Mode Decomposition) adaptive morphology. The GIS mechanical oscillation signal time frequency analysis method based on VMD adaptive morphology includes the steps: simulating different types of mechanical faults of GIS equipment; detecting oscillation signals of the GIS equipment in the normal condition and the simulation condition for many times; utilizing VMD to realize time frequency analysis of the oscillation signals, and finding out the change ofthe oscillation signal amplitude of the GIS device, following frequency distribution; and by integrating with Hilbert analysis, obtaining the characteristic criteria of the faults, by simulating different types of mechanical faults, establishing a GIS mechanical fault diagnosis database to realize time frequency analysis of the oscillation signals of the GIS equipment. The GIS mechanical oscillation signal time frequency analysis method based on VMD adaptive morphology performs time frequency analysis on the mechanical oscillation signals through the VMD algorithm, and can effectively processthe GIS oscillation signals so as to establish the GIS mechanical fault diagnosis database to provide theoretical basis for realizing field live detection of the GIS mechanical faults.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a time-frequency analysis method for GIS mechanical vibration signals based on VMD adaptive morphology. Background technique [0002] Gas-insulated metal-enclosed switchgear (Gas Insulated Switchgear, GIS) will produce a variety of mechanical defects, such as loose screws, failure of the circuit breaker operating mechanism, and vibration of the transformer. Therefore, it is possible to improve the operational stability of GIS by diagnosing early defects in GIS by monitoring mechanical faults. The vibration signal generated by the internal failure of GIS is transmitted to the GIS cylinder through the medium. For the GIS equipment in operation, sensors are often placed on the surface of the cylinder to receive the transmitted vibration signal, so as to detect whether the GIS is operating abnormally, that is, a failure occurs. Because the vibration signal detection method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00
CPCG01M13/00
Inventor 马帅王志涛亓延峰李岩赵信华李晓亮韩涛吴丽娟苏将涛何振华李秀红张伟
Owner STATE GRID SHANDONG ELECTRIC POWER
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