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Method for acquiring resistance of power station or transformer substation grounding grid with karst geological and geomorphic characteristics

A technology of substation grounding grid and landform features, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of uneven soil resistivity and high soil resistivity of the grounding grid

Inactive Publication Date: 2016-11-09
CHINA THREE GORGES UNIV
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for obtaining the resistance value of the grounding grid of a power station or substation with karst geomorphological characteristics, and to solve the two technical problems of uneven soil resistivity and extremely high soil resistivity of the grounding grid with karst geomorphic characteristics

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  • Method for acquiring resistance of power station or transformer substation grounding grid with karst geological and geomorphic characteristics
  • Method for acquiring resistance of power station or transformer substation grounding grid with karst geological and geomorphic characteristics
  • Method for acquiring resistance of power station or transformer substation grounding grid with karst geological and geomorphic characteristics

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Embodiment Construction

[0034] A method for obtaining the resistance value of the grounding grid of a power station or substation with characteristics of karst geology and geomorphology is characterized in that it comprises the following steps:

[0035] Step 1. Determine the grounding soil resistivity and test points;

[0036] Step 2: Calculate the resistance value of the main grounding grid;

[0037] Step 3: Calculate the resistance value of the auxiliary grounding grid to reduce the soil resistivity;

[0038] Step 4. Calculate the resistance value of the grounding grid of the power station or substation with karst geological features.

[0039] Further, the method for determining the grounding soil resistivity and test points is as follows: select n test points, the soil density of the test point at the lead wire of the grounding grid is greater than the soil density of the test points at other locations of the grounding grid; and then calculate the average soil resistance of the grounding grid Rate ρ ∑ , Us...

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Abstract

The invention discloses a method for acquiring a resistance of a power station or transformer substation grounding grid with karst geological and geomorphic characteristics. The method comprises the following steps of: step I, determining a grounding soil resistivity and a test point; step II, calculating a resistance of a main grounding grid; step III, calculating a resistance of an auxiliary grounding grid for reducing a soil resistivity; and step IV, calculating the resistance of the power station or transformer substation grounding grid with the karst geological and geomorphic characteristics. According to the method for acquiring the resistance of the power station or transformer substation grounding grid with the karst geological and geomorphic characteristics, two technical problems of non-uniform soil resistivity and ultrahigh soil resistivity of the grounding grid with the karst geological and geomorphic characteristics are solved.

Description

Technical field [0001] The invention relates to the technical field of grounding, in particular to a method for obtaining the resistance value of the grounding grid of a power station or a substation with karst geomorphological features. Background technique [0002] The grounding grid of a power station or substation is an important part of the actual construction project of the power system, and is closely related to the long-term normal and safe operation of the substation. The "rocky desertification" in karst areas, karst and mountain valley landforms, less soil, low water storage capacity, such geological features, the soil resistivity is very high, the soil resistivity is high, and the geological conditions of different locations vary greatly. The grounding performance of the grounding grid is directly related to the personal safety of the staff in the station and the safety of various electrical equipment. Therefore, designing a reasonable and cost-effective grounding grid...

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Application Information

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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 陈堂贤邢航周旖辉陈茜刘艳芳范声海
Owner CHINA THREE GORGES UNIV
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