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GIS mechanical state signal feature extraction method

A technology of signal characteristics and extraction methods, which is applied to computer components, measuring devices, instruments, etc., can solve problems such as interference, achieve the effects of improving accuracy, eliminating the influence of interference on the measurement site, and reducing noise interference

Inactive Publication Date: 2019-02-15
RED PHASE INC
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Problems solved by technology

However, the vibration signal of GIS measured in the field is a typical non-stationary signal and is easily affected by field disturbances.

Method used

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  • GIS mechanical state signal feature extraction method
  • GIS mechanical state signal feature extraction method
  • GIS mechanical state signal feature extraction method

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Embodiment Construction

[0036] The specific embodiments of the present invention will be described below with reference to the drawings. In order to fully understand the present invention, many details are described below, but for those skilled in the art, the present invention can be implemented without these details.

[0037] A GIS mechanical state signal feature extraction method includes the following steps:

[0038] Step 1: Collect the vibration signal under the GIS operating state.

[0039] Specifically, the acceleration sensor installed on the surface of the GIS shell is used to collect the vibration signal of the GIS in the operating state.

[0040] Step 2: Using the pole symmetry modal decomposition method (ESMD), perform ESMD primary decomposition of the vibration signal obtained in Step 1 to obtain each modal function (IMF). Step 2 specifically includes the following content.

[0041] Step 2.1: Mark all local extreme points of the vibration signal Y to be processed (n is the total number of local ...

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Abstract

The invention discloses a GIS mechanical state signal feature extraction method, which comprises: measuring vibration signal under GIS running state, decomposing vibration measurement data by using pole symmetric modal decomposition algorithm (ESMD), decomposing the decomposed result according to K. L divergence value is selected as effective empirical mode component (IMF), each IMF is selected asthe original data quadratic decomposition, and principal component reconstruction is selected to further reduce noise interference. This method can effectively eliminate the influence of field disturbance and improve the precision of GIS vibration signal feature extraction.

Description

Technical field [0001] The invention relates to the technical field of power equipment monitoring, and more specifically to a method for extracting features of GIS mechanical state signals. Background technique [0002] Gas insulated combined electrical equipment (GIS) is a closed combination of electrical components such as circuit breakers, disconnect switches, fast grounding switches, current transformers, arresters, busbars, bushings and cable terminals in a grounded metal shell, and the interior is filled with 0.3~0.4 SF6 gas of MPa is used as a high-voltage electrical appliance as an insulating medium. It has the advantages of compact structure, small floor space, convenient installation, and high operational reliability. In recent years, with the development of high-voltage power transmission and the needs of urbanization, GIS has been widely used. With the increase in the amount of GIS investment, its failure rate is getting higher and higher, so the problem of GIS faul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G01H17/00
CPCG01H17/00G06F2218/08
Inventor 田阳普洪鹏鹏邓敏贺鹏刘成宝
Owner RED PHASE INC
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