Method for predicating corrosion rate of soil of transformer substation grounding grid

Abstract

The invention discloses a method for predicating the corrosion rate of soil of a transformer substation grounding grid. A current parameter analyzing method cannot well solve the grounding grid corrosion rate predicating problem. The method includes the steps that sampling points are reasonably distributed in a selected area; soil parameters are measured at the sampling points, the soil parameters comprise the resistivity, the moisture content, the redox potential, the pH value and the volume weight, a soil sample is collected back to a laboratory to conduct the measurement of salinity and the chloride ion physical and chemical property, and meanwhile an electrochemical method is used for measuring the corrosion rate of metal materials in the soil; the seven indexes of the resistivity, the moisture content, the redox potential, the pH value, the volume weight, the salinity and the chloride ion are used for setting up a model, and a BP neural network is used for training measured data. The method is fast, effective, accurate in predication and capable of providing a reliable basis for predicating the corrosion rate of the soil of the transformer substation grounding grid.

Description

technical field [0001] The invention relates to soil corrosion prediction technology, in particular to a method for predicting soil corrosion rate, which is mainly used in the research on soil corrosion prediction of regional substation grounding grids. Background technique [0002] The grounding grid is an electrical facility buried to prevent the grounding short-circuit current from endangering the safety of people and equipment. It plays a role in discharging and equalizing lightning, static electricity and fault currents. Strong guarantee. However, due to the long-term underground operation of the grounding device, the operating environment is harsh and corrosion is prone to occur. In recent years, the problem of grounding grid exposure has become more and more prominent. According to surveys in Guangdong, Shandong, Jiangsu, Anhui and other places, the grounding grid generally rots within 10 years, and it can rot in as fast as 4 years. For example, in Guangdong Provinc...

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This method of assuming that the data obeys a certain distribution in advance is unreasonable to explain some unknown worlds, because this assumption m

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