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Soil multi-impact discharge characteristic parameter analysis method and system

A technology of impulse discharge and characteristic parameters, which is applied in the direction of material analysis, material analysis, and material breakdown voltage through electromagnetic means, can solve the problems of detection accuracy of lightning strike electrical parameters that affect grounding environment soil, and improve detection accuracy and reliability High performance, wide application range, easy to achieve effect

Pending Publication Date: 2021-03-12
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST +1
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  • Application Information

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Problems solved by technology

[0005] In order to solve the limitations of the existing soil impact discharge characteristic parameter numerical simulation method and the problem of affecting the detection accuracy of the lightning strike electrical parameters of the soil in the grounding environment, the present invention provides a soil multiple impact discharge characteristic parameter analysis method

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  • Soil multi-impact discharge characteristic parameter analysis method and system
  • Soil multi-impact discharge characteristic parameter analysis method and system
  • Soil multi-impact discharge characteristic parameter analysis method and system

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Embodiment 1

[0049]Compared with the existing numerical simulation analysis method, this embodiment proposes a method for analyzing characteristic parameters of soil multiple impact discharge.

[0050] Specific as figure 1 As shown, the method of this embodiment mainly includes the following steps:

[0051] Step 1: collect basic data, and construct a three-dimensional spatial structure of the discharge channel based on the basic data.

[0052] The basic data collected in step 1 of this embodiment includes electrical parameters and structural parameters. The electrical parameters include voltage and current waveform parameters on the soil medium during continuous impulse discharge, and electrical parameters of the soil medium, such as soil resistivity; the structural parameters include The actual spatial structure of the underground discharge channel and the physical structure parameters of the soil discharge environment.

[0053] The electrical parameters of this embodiment can be obtain...

Embodiment 2

[0070] Based on the above-mentioned embodiment 1, this embodiment also proposes a soil multiple impact discharge characteristic parameter analysis system, specifically as follows figure 2 As shown, the system of this embodiment includes a data acquisition module, a three-dimensional module, a first parameter analysis module, a constraint condition module and a subsequent parameter analysis module.

[0071] The data collection module of this embodiment is used for collecting basic data;

[0072] The three-dimensional module of this embodiment constructs the three-dimensional space structure of the discharge channel based on the basic data;

[0073] The first parameter analysis module of this embodiment builds the first numerical calculation model based on the three-dimensional space structure of the discharge channel, and performs the inversion calculation of the characteristic parameters of the first impact discharge through the first numerical calculation model, and obtains ...

Embodiment 3

[0078] In this embodiment, the method and system proposed in the above embodiments are applied to the analysis of specific soil multiple impact discharge characteristic parameters, and the specific process is as follows:

[0079] 1. First determine the object to be calculated, and collect basic data.

[0080] First, the basic parameters of the discharge environment are collected before the impact current discharge. In this case, the size of the discharge sandbox is 20*20*20cm, the vertical electrode 1 is a metal cylinder with a length of 10cm and a diameter of 6mm, and the initial soil resistivity of the soil medium ρ 0 It is 213Ω·m.

[0081] The electrical parameters were collected. The peak value of the impulse current injected into the soil through the vertical electrode 1 was 2kA, and the waveform parameter was 8 / 20μs. The peak value of the first impulse voltage collected was 21.1kV, and the peak value of the subsequent impulse voltage was 6.4kV.

[0082] Collect the stru...

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Abstract

The invention discloses a soil multi-impact discharge characteristic parameter analysis method and system. The method comprises the following steps: collecting basic data, and constructing a dischargechannel three-dimensional space structure based on the basic data; performing first impact discharge characteristic parameter inversion calculation through the first numerical calculation model to obtain soil dielectric impact discharge residual resistivity and equivalent critical breakdown electric field intensity under the action of first impact; judging a multi-impact discharge channel structure and constraint conditions according to the discharge channel three-dimensional space structure; and performing inversion calculation on the post-impact discharge characteristic parameters through the initialized and set post-impact numerical calculation model to obtain the residual resistivity and the equivalent critical breakdown electric field intensity when the soil medium is subjected to secondary breakdown. By considering the actual lightning multi-impact discharge channel structure, the discharge characteristic parameter numerical simulation calculation is performed to obtain the discharge characteristic parameter more consistent with the actual situation, and the lightning electrical parameter detection precision and reliability of the soil are improved.

Description

technical field [0001] The invention belongs to the technical field of detection of grounding characteristics of electric power systems, and in particular relates to a method and system for analyzing characteristic parameters of soil multiple impact discharges. Background technique [0002] The soil medium is the main dispersion medium of the grounding system, and the accuracy of its impulse discharge characteristic parameters directly determines whether the calculation results of the lightning transient model of the grounding system are correct or not. The calculation method of the soil lightning discharge parameters has always been the field of grounding. One of the key research contents. [0003] The characteristic parameters of soil impact discharge mainly include the soil critical breakdown field strength E c and the residual resistivity ρ of the discharge area res . Since the transient parameters in the discharge process are difficult to measure directly, most of th...

Claims

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Application Information

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IPC IPC(8): G01N27/04G01N27/92
CPCG01N27/041G01N27/92Y02A90/30
Inventor 罗东辉曹永兴袁涛司马文霞谢施君张榆张晨萌张波谭波李伟
Owner STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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