Soil corrosivity evaluation method for substation grounding network in Guangdong area

A substation grounding grid, corrosion technology, applied in soil material testing, measuring electrical variables, measuring current/voltage and other directions, can solve the problem of lack of evaluation methods for substation corrosion problems, and achieve convenient on-site implementation, high prediction accuracy, and operation. simple effect

Inactive Publication Date: 2009-08-12
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcomings of various soil corrosion evaluation techniques at present. According to the rapid development of the power system in Guangdong area and the lack of suitable evaluation methods for substation corrosion problems, a simple, accurate and convenient on-site implementation of Guangdong Soil Corrosivity Assessment Method for Regional Substation Grounding Grid

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  • Soil corrosivity evaluation method for substation grounding network in Guangdong area
  • Soil corrosivity evaluation method for substation grounding network in Guangdong area
  • Soil corrosivity evaluation method for substation grounding network in Guangdong area

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Embodiment Construction

[0039] One, the following combination figure 1 , figure 2 A detailed description of the eight soil parameter measurements1:

[0040] 1. Soil texture 1.1

[0041] Soil texture 1.1 Classification includes sandy soil, sandy silt soil, silt soil or silty loam soil, clay loam soil and clay soil, a total of five categories, eight index comprehensive scoring method 2 The index score is called Z1, and the scores are -6, -4, 0 respectively , 4 and 6.

[0042] 2. Soil pH 1.2

[0043] The value range of soil pH value 1.2 includes five categories: >8.5, >7.0 and ≤8.5, >5.5 and ≤7.0, >4.5 and ≤5.5 and ≤4.5. for -4, -2, 0, 2 and 4.

[0044] 3. Soil resistivity 1.3

[0045] The numerical range of soil resistivity 1.3 includes three categories: >50Ω.m, >20 and ≤50Ω.m and ≤20Ω.m. In the eight-index comprehensive scoring (2) method, the index score is called Z3, and the scores are -2, 0 and 2.

[0046] 4. Soil salt content 1.4

[0047] The value range of soil salinity 1.4 includes <0....

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Abstract

The invention discloses a method for evaluating soil corrosivity of a grounding grid of a substation in Guangdong region, and relates to a method for evaluating the soil corrosivity. The method comprises the following steps: (1) picking up the soil on the buried depth position of the grounding grid to measure eight soil parameters(1) by conventional methods; (2) utilizing an eight index comprehensive grading method to determine a comprehensive grade(2); and (3) determining the grade of the soil corrosivity according to an eight index comprehensive grading result(3). The eight soil parameters include soil texture(1.1), soil pH value(1.2), soil electric resistivity(1.3), soil salt content(1.4), soil water content(1.5), corrosion potential(1.6), and soil C1+2SO4 content (1.7). The method is not only used for evaluating the soil corrosivity environment caused by the grounding grid steel of the substation operated in Guangdong region and predicting the soil corrosivity environment caused by the grounding grid steel of a newly built substation, but also applied to evaluating the corrosive protection of the buried steel in other industries in Guangdong region.

Description

technical field [0001] The invention relates to a soil corrosion evaluation method, in particular to a soil corrosion evaluation method for substation grounding grids in Guangdong area. Background technique [0002] The substation grounding grid is a netted grounding device composed of flat steel, round steel, angle steel, etc. It is an important guarantee for the safety of power system equipment and personal safety. Metal soil corrosion is mainly electrochemical corrosion, and corrosion of primary batteries is its most basic form. The grounding grid has been in the harsh underground operating environment for a long time, and soil corrosion is inevitable. Restricted by resources, technical and economic issues, my country mainly uses steel as the material of the grounding grid, and the amount of steel used is huge. The corrosion survey of grounding grids in substations in various places shows that the corrosion of grounding grids is quite prominent, and there are great dif...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24G01N27/04G01R27/02G01R19/00
Inventor 陆培钧黄松波豆朋黄涛王建国周蜜向念文
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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