Digging-free transformer substation grounding grid corrosion degree monitoring device based on vacuum

Abstract

The invention provides a digging-free transformer substation grounding grid corrosion degree monitoring device based on vacuum. The device comprises at least one cylindrical structure, a breather pipe connected with each cylindrical structure in sequence and a shell-shaped structure with a set transparency, the cylindrical structure, the breather pipe and the shell-shaped structure are communicated with one another and form a sealed space, and the sealed space is vacuum; the sealed space comprises a pressure ball and a ball support for supporting the pressure ball, the pressure ball is arranged in the shell-shaped structure, one end of the ball support is fixed to the cylindrical structure, and the other end of the ball support penetrates through the breather pipe into the shell-shaped structure to support the pressure ball; the material of each cylindrical structure is the same as that of a grounding grid to be monitored, the cylindrical structure and the grounding grid to be monitored are buried under the ground in the same period, and the height from the cylindrical structure to the ground is the same as that from the grounding grid to the ground; the shell-shaped structure is located over the ground. The digging-free transformer substation grounding grid corrosion degree monitoring device based on the vacuum can effectively monitor corrosion conditions of the transformer substation grounding grid on the premise of not digging and sampling the grounding grid.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a vacuum-based excavation-free substation grounding grid corrosion degree monitoring device. Background technique [0002] According to the requirements of China Southern Power Grid Co., Ltd. enterprise standard "Preventive Test Procedures for Electric Power Equipment (Q / CSG114002-2011)", the five provinces in southern my country conduct excavation and corrosion inspections on substation grounding grids in a 10-year cycle. Select 5-8 points at each station to excavate and inspect along the grounding down-conductor, use visual inspection, sampling to determine the corrosion rate and corrosion rate and other quantitative indicators to judge the corrosion of the substation grounding grid, if the corrosion rate is less than 10%, the corrosion degree is average ; If the corrosion rate is greater than or equal to 25%, the degree of corrosion is severe. However, in the process of...

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Problems solved by technology

However, in the process of specific implementation, there are also some problems, such as: the excavation and sampling of the grounding grid will destroy the original structure of the substation; the local serious corrosion of the grounding grid in the substation may be missed; some substations do not meet the grounding requirements. The conditions for grid excavation or sampling; the timeliness of grasping the corrosion situation of the ground grid is limited

[0003] At present, there is no report on the test method for the corrosion degree of the excavation-free grounding grid

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