Fuzzy prediction method of corrosion rate of transformer substation grounding grid

Abstract

The invention discloses a fuzzy prediction method of corrosion rate of a transformer substation grounding grid. The fuzzy prediction method comprises the steps of determining the degree of membership according to the correlativity of soil physicochemical indexes and corrosion of the transformer substation grounding grid; determining the corrosion contribution degree of different soil physicochemical indexes on the grounding grid, and calculating the close degree between different areas of transformer substation grounding grids. The problems of a plurality of involved factors, intricate relation, and uncertainty and fuzziness in related factors in prediction of the corrosion rate of the grounding grid are solved by the fuzzy prediction model; poor model prediction accuracy caused by a small sample is avoided at the same time; and the corrosion rate of the transformer substation grounding grid can be rapidly and effectively predicted on engineering as to grounding grid sites which are adjacent in region or in soil physicochemical indexes.

Description

technical field [0001] The invention relates to a corrosion rate prediction method, in particular to a fuzzy prediction method for the corrosion rate of a substation grounding grid. Background technique [0002] The grounding system of the substation is the fundamental guarantee and important measure to maintain the safe and reliable operation of the power system and ensure the safety of operators and electrical equipment. The corrosion or fracture of the grounding grid conductor will cause serious accidents and bring huge economic losses. It is of great significance to the safe and reliable operation of the power system to realize the diagnosis of the corrosion of the ground grid without power failure and excavation of the ground grid, and to guide the relevant staff to take certain remedial measures for the corroded ground grid. At present, the existing methods for grounding grid diagnosis mainly fall into three categories: one is: based on the electromagnetic field theory...

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Problems solved by technology

These two types of methods can obtain the fracture of the grounding grid to a certain extent, but it is difficult to obtain the specific corrosion rate of the grounding grid; the other method is to obtain the instantaneous corrosion rate and local corrosion of the grounding grid through electrochemical detection, and it is difficult to predict the corrosion rate. provide a valid basis

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