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Method and device for detecting topological structure of grounding grid

A topology and detection device technology, which is applied in the field of power systems, can solve problems such as the inability to effectively detect the topological structure of the grounding network, and achieve the effects of effective detection, good robustness, and strong anti-noise ability

Pending Publication Date: 2021-01-12
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0003] This application provides a method and device for detecting the topological structure of the grounding grid to solve the problem that the topology of the grounding grid cannot be effectively detected in the prior art

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  • Method and device for detecting topological structure of grounding grid
  • Method and device for detecting topological structure of grounding grid
  • Method and device for detecting topological structure of grounding grid

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[0039] The embodiments will be described in detail hereinafter, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following examples do not represent all implementations consistent with this application. These are merely examples of systems and methods consistent with aspects of the present application as recited in the claims.

[0040] see figure 1 , figure 1 It is a flowchart of a method for detecting the topological structure of a grounding grid provided by the present invention. like figure 1 shown, including the following steps:

[0041] Step 101. Collect the vertical component of the surface magnetic induction intensity at each of the multiple measuring points set above the grounding grid, wherein a constant-amplitude sinusoidal current is injec...

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Abstract

The invention provides a method and a device for detecting a topological structure of a grounding grid, and the method comprises the steps: collecting a ground surface magnetic induction intensity vertical component at each measurement point in a plurality of measurement points disposed above the grounding grid, wherein a constant-amplitude sinusoidal current is injected into the grounding grid; obtaining a fitting magnetic field distribution data matrix according to the surface magnetic induction intensity vertical component at each measuring point in the plurality of measuring points; performing edge detection processing on the fitting magnetic field distribution data matrix to obtain a wavelet coefficient matrix representing magnetic field edge information; performing ripple eliminationprocessing on the wavelet coefficient matrix to obtain an imaging graph of the topological structure of the grounding grid; and determining the laying depth of the conductor in the grounding grid according to the imaging graph of the topological structure of the grounding grid. Thus, the magnetic field vertical component gradient characteristics of each conductor section can be stripped from thebackground field by utilizing wavelet edge detection, the influence of magnetic field superposition on the positioning precision is reduced, and the effective detection of the topological structure ofthe grounding grid is realized.

Description

technical field [0001] The present application relates to the technical field of electric power systems, and in particular to a method and device for detecting the topological structure of a grounding grid. Background technique [0002] The detection targets of existing pipeline detection equipment are generally straight pipelines with a length of 50m. Even for cables with small diameters, the insulating layer prevents the excitation signal from spreading to the soil, and the characteristics are more prominent. The conductor grid of the grounding grid is intricate, and the grid spacing is generally 3m to 7m, which does not meet the detection scale requirements of pipeline detection equipment. Moreover, the electromagnetic environment of the substation is relatively complex, and the signal confusion caused by the transient response of the power system will make the pipeline detection equipment unable to be directly used in the topology detection of the grounding grid. Theref...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/08G01V3/38G01R33/10G01B7/26
CPCG01V3/087G01V3/38G01R33/10G01R33/0029G01B7/26
Inventor 李波张林山曹敏沈映付志红王秀娟王浩文
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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