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A Calculation Method of Grounding Resistance in Areas with High Soil Resistivity

A technology of soil resistivity and grounding resistance, applied in the field of high-voltage power transmission and transformation, can solve the problems of calculation, inability to reduce grounding resistance, etc., and achieve the effect of reducing lightning accidents, reducing grounding costs, and reducing the amount of steel used.

Active Publication Date: 2021-02-19
CHENGDU TECH UNIV
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Problems solved by technology

[0005] The purpose of the present invention is: the present invention provides a grounding resistance calculation method in areas with high soil resistivity, which solves the technical problem that the grounding resistance cannot be reduced and calculated when the grounding resistance is caused by the high soil resistivity in the area where the power transmission line is located

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  • A Calculation Method of Grounding Resistance in Areas with High Soil Resistivity
  • A Calculation Method of Grounding Resistance in Areas with High Soil Resistivity
  • A Calculation Method of Grounding Resistance in Areas with High Soil Resistivity

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Embodiment 1

[0031] This embodiment provides a grounding device in a high soil resistivity area, including a grounding panel 1, the grounding panel 1 is a rectangular panel, the size of the rectangular panel is calculated according to the local installation and geological conditions, and the grounding panel 1 is vertical Buried in the ground, for protection and safety, the height of the top of the grounding panel 1 from the ground is greater than 0.3m when buried, and the buried depth is also related to the local installation and geological conditions.

[0032] Grounding holes are provided on the grounding panel 1, and the grounding holes are used to connect with grounding equipment. The grounding holes include two types. The first type is a grounding hole arranged on the grounding panel 1, and the grounding holes are arranged every 10 meters. One, the diameter of the grounding hole is 17.5mm, the grounding hole is 25mm away from the upper edge of the grounding panel 1, and two grounding ho...

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Abstract

The invention discloses a grounding device and a grounding resistance calculation method for a high-soil-resistivity region, and belongs to the technical field of high-voltage power transmission and transformation, the grounding device comprises a grounding panel, the grounding panel is a rectangular panel, and the grounding panel is vertically buried in the ground; the field intensity, the potential and the grounding resistance of the grounding panel on the horizontal x axis can be accurately calculated through a calculation formula; according to the invention, the grounding resistance is reduced by reducing the density of the current transited from the grounding panel to the soil; according to the novel calculation method, the resistance value of the grounding resistor can be specifically calculated when the rectangular panel is used as the grounding device in the high-soil-resistivity region, and accurate calculation of the resistance of the panel grounding device is realized, so that the problem of the grounding resistor in the high-soil-resistivity region is fundamentally solved.

Description

technical field [0001] The invention relates to the technical field of high-voltage power transmission and transformation, in particular to a calculation method for grounding resistance in areas with high soil resistivity. Background technique [0002] In terms of lightning current impact grounding, most of the transmission lines in my country are in minefields. Lightning accidents are the main component of power grid accidents, which greatly affect the safe operation and stability of the power grid. Reducing grounding resistance is the main factor to improve the lightning resistance level of transmission lines. methods and measures. [0003] The current grounding devices are all made of ￠10-16 round steel, and the types are generally horizontal single radial type, horizontal star multiple radial type, horizontal mesh, and single vertical grounding. These grounding devices are designed in high soil resistivity. Regions are difficult to meet design requirements. Composite, m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01R4/66G06F30/20
CPCH01R4/66
Inventor 张晓东张艳丽霍平陈宇峰杨欣仪高昕王琪于文萍
Owner CHENGDU TECH UNIV
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