Ground resistance calculation method of double-layer soil containing massive medium

A calculation method and technology of grounding resistance, applied in the field of calculation of grounding resistance of double-layer soil with massive medium, can solve problems such as large errors

Inactive Publication Date: 2014-12-10
HOHAI UNIV
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  • Application Information

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Problems solved by technology

In actual engineering, when the massive medium of the grounding system penetrates into the lower layer, if the grounding resistance of the grounding system is still considered according to the above soil model, there will be a large error

Method used

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  • Ground resistance calculation method of double-layer soil containing massive medium
  • Ground resistance calculation method of double-layer soil containing massive medium
  • Ground resistance calculation method of double-layer soil containing massive medium

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Embodiment Construction

[0048] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0049] Such as figure 1 with figure 2 Shown is a two-layer soil model with a block medium, including the ground and the upper soil below the ground, the lower soil, the block medium and at least one cylindrical grounding body. The resistivity of the upper layer of soil is different from that of the lower layer of soil, wherein the resistivity of the upper layer of soil is smaller than that of the lower layer of soil or the resistivity of the upper layer of soil is larger than that of the lower layer of soil; the block medium is evenly distributed in the upper layer of soil and the lower layer of soil, wherein The resistivity of the block medium is smaller than that of the surrounding soil or the resistivity of the block medium is larger than that of the surrounding soil, and the block medium in the soil can be one or more. The shape of th...

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Abstract

The invention discloses a ground resistance calculation method of a double-layer soil containing a massive medium. A double-layer soil model containing the massive medium comprises a ground, upper layer soil, lower layer soil and the massive medium which are arranged under the ground and at least one cylindrical ground body. The massive medium is evenly distributed in the upper layer soil and the lower layer soil, and the ground body is vertically inserted into the ground surface and is completely wrapped by the massive medium. A moment method is adopted to disperse an integral equation to be calculated by building the model, a matrix equation is calculated, and finally the ground resistance is obtained. The method is smaller in error and accurate in calculation result.

Description

technical field [0001] The invention relates to a calculation method for the grounding resistance of double-layer soil with massive medium, which belongs to the technical field of grounding of power systems, and in particular relates to a calculation model and a calculation method for the penetration of massive medium into the lower layer of soil. Background technique [0002] At present, my country's UHV AC and DC power grids are successively designed, constructed and put into operation. With the construction of a strong and smart grid in my country, a backbone grid with UHV grid as the core is taking shape. The level of the power grid is getting bigger and bigger, and the capacity of the system transmission is also increasing, which puts forward higher requirements for the safety, stability and economy of the power system operation. As an important measure to ensure the safe operation of the power system, the normal operation of electrical equipment and the personal safet...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/20
Inventor 潘文霞刘铜锤唐靓周建文宋景博黄涛
Owner HOHAI UNIV
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