Method and device for comprehensive evaluation of electric power grounding corrosion

Abstract

The present application relates to the technical field of power engineering grounding corrosion prevention, and particularly relates to a method and device for comprehensively evaluating power grounding corrosion. The method for comprehensively evaluating power grounding corrosion comprises the following steps: scoring each parameter in a first macroscopic parameter group and a second macroscopic parameter group of a soil sample to obtain corresponding scores; summing the scores corresponding to each parameter to obtain a score result; determining a corrosion rate of the soil sample through a preset correlation between the corrosion rate and the score result; determining first, second and third corrosion rate increase values of a grounding body through the relationship between the grounding potential difference, the ground current intensity, the ground direct current intensity and the first, second and third corrosion rate increase values, and summing the corrosion rate of the soil sample to obtain a final evaluation result of the grounding body corrosion condition; the present application can combine the corrosion properties of the soil itself with the grounding characteristics in the power transmission and transformation field, so that the evaluation result is more accurate and closer to the real working condition.

Description

Technical Field

[0001] This invention relates to the field of power engineering grounding corrosion prevention technology, and in particular to a method and apparatus for comprehensively evaluating power grounding corrosion. Background Technology

[0002] The grounding electrode of power transmission and transformation equipment plays a crucial role in power engineering by guiding fault current, protecting against lightning strikes, and ensuring the safety of personnel and equipment. Therefore, it is of paramount importance to the safe and stable operation of the power system. When the performance of the grounding electrode deteriorates, causing the current to be unable to smoothly enter the ground, the potential at the tower will be too high. On the one hand, this may cause the transmission line to trip, affecting the stable operation of the line. On the other hand, it will seriously threaten the lives of people near the tower and the line.

[0003] Corrosion of grounding electrodes is often the main cause of reduced performance. Since grounding electrodes are usually buried at a certain depth underground, they are easily affected by the soil's humid environment, high temperature environment, acidity and alkalinity, and microorganisms in the soil, which leads to corrosion. According to incomplete surveys and statistics, corrosion has caused many serious accidents due to grounding faults in my country, resulting in huge economic and social losses.

[0004] Evaluating the corrosion state of grounding corrosion can effectively eliminate the occurrence of grounding electrode faults caused by grounding corrosion. Currently, the evaluation methods used in the power industry only consider the electrochemical corrosion of the material itself, without combining the corrosion properties of the soil itself with the grounding characteristics in the power transmission and transformation field. This leads to misjudgments of the corrosion state of the grounding electrode, creating hidden dangers for power accidents. Summary of the Invention

[0005] This invention provides a method for comprehensively evaluating power grounding corrosion, which solves the problem of inaccurate evaluation of the corrosion status of grounding bodies.

[0006] The first aspect of this invention provides a method for comprehensively evaluating power grounding corrosion, comprising the following steps;

[0007] The first set of macroscopic parameters of the soil samples was obtained by testing the soil samples at the pre-buried location of the grounding electrode, and the second set of macroscopic parameters was obtained by conducting an environmental survey at the pre-buried location of the grounding electrode.

[0008] Based on the preset score and the correspondence between each parameter in the first macro parameter group and the second macro parameter group, each parameter in the first macro parameter group and the second macro parameter group is scored to obtain the score corresponding to each parameter.

[0009] The scoring result is obtained by summing the scores corresponding to each parameter in the first macroscopic parameter group and the second macroscopic parameter group;

[0010] The corrosion rate of the soil sample is determined by the correspondence between the preset corrosion rate and the scoring results.

[0011] The first corrosion rate increase value of the grounding body is determined by the correspondence between the grounding potential difference of the grounding body and the first corrosion rate increase value.

[0012] The second corrosion rate increase of the grounding electrode is determined by the correspondence between the grounding electrode size, the intensity of the AC current entering the ground, and the second corrosion rate increase.

[0013] The increase in the third corrosion rate of the grounding electrode was determined by the correspondence between the grounding electrode material, the intensity of the DC current entering the ground, and the increase in the third corrosion rate.

[0014] The corrosion rate of the soil sample, the increase in the first corrosion rate, the increase in the second corrosion rate, and the increase in the third corrosion rate are added together to obtain the corrosion rate of the grounding electrode.

[0015] By establishing the correspondence between the corrosion rate and corrosion level of the grounding electrode, the corrosion level of the grounding electrode is determined, thereby obtaining the final evaluation result regarding the corrosion status of the grounding electrode.

[0016] Specifically, the first set of macroscopic parameters of the soil samples is obtained by testing the soil samples at the pre-buried location of the grounding electrode, and the second set of macroscopic parameters is obtained by conducting an environmental survey at the pre-buried location of the grounding electrode.

[0017] Soil samples from the pre-buried location of the grounding electrode were tested to obtain the first set of macroscopic parameters, including soil texture, soil resistivity, soil pH, Cl ion content, and soil redox potential.

[0018] An environmental survey was conducted at the pre-buried location of the grounding electrode to obtain a second set of macroscopic parameters, including the annual average temperature, annual average precipitation, and average burial depth of groundwater.

[0019] Specifically, the corrosion rate of the soil sample is determined by establishing a pre-defined correspondence between the corrosion rate and the scoring results.

[0020] When the score is less than the first preset score, the corrosion rate is less than 0.01 mm / a, and the designed corrosion rate value is taken as 0.01 mm / a;

[0021] When the score is less than the second preset score but greater than the first preset score, the corrosion rate is less than 0.025 mm / a and greater than 0.01 mm / a, and the design value of the corrosion rate is taken as 0.0175 mm / a.

[0022] When the score is less than the third preset score but greater than the second preset score, the corrosion rate is less than 0.05 mm / a and greater than 0.025 mm / a, and the design value of the corrosion rate is taken as 0.0375 mm / a.

[0023] When the score is less than the fourth preset score but greater than the third preset score, the corrosion rate is less than 0.075 mm / a and greater than 0.05 mm / a, and the design value of the corrosion rate is taken as 0.0675 mm / a.

[0024] When the score result is greater than the fourth preset score, the corrosion rate is greater than 0.075 mm / a, and the designed corrosion rate value of 0.075 mm / a is taken.

[0025] Specifically, the determination of the first corrosion rate increase value for the grounding electrode based on the preset correspondence between the grounding potential difference of the grounding electrode and the first corrosion rate increase value is as follows:

[0026] When the grounding potential difference is less than the first preset grounding potential difference, the first corrosion rate increase value is taken as 0.0025 mm / a;

[0027] When the grounding potential difference is greater than the first preset grounding potential difference but less than the second preset grounding potential difference, the first corrosion rate increase value is taken as 0.005 mm / a;

[0028] When the grounding potential difference is greater than the second preset grounding potential difference but less than the third preset grounding potential difference, the first corrosion rate increase value is taken as 0.0075 mm / a;

[0029] When the grounding potential difference is greater than the third grounding potential difference, the first corrosion rate increase value is taken as 0.01 mm / a.

[0030] Specifically, the determination of the third corrosion rate increase value of the grounding electrode based on the correspondence between the grounding electrode material, the DC current intensity entering the ground, and the third corrosion rate increase value is as follows:

[0031] The increase in the third corrosion rate of the grounding electrode is determined by the correspondence between the atomic weight, valence, cross-sectional area, and DC current intensity of the grounding electrode material and the increase in the third corrosion rate.

[0032] Specifically, by establishing the correspondence between the corrosion rate and corrosion level of the grounding electrode, the corrosion level of the grounding electrode is determined, thereby obtaining the final evaluation result regarding the corrosion status of the grounding electrode.

[0033] When the corrosion rate of the grounding electrode is less than 0.01 mm / a, it is evaluated as Class I corrosion, and the corrosion rate of the grounding electrode is low.

[0034] When the corrosion rate of the grounding electrode is less than 0.025 mm / a and greater than 0.01 mm / a, it is evaluated as level two corrosion, and the corrosion rate of the grounding electrode is medium to low.

[0035] When the corrosion rate of the grounding electrode is less than 0.05 mm / a and greater than 0.025 mm / a, it is evaluated as level three corrosion, and the corrosion rate of the grounding electrode is moderate.

[0036] When the corrosion rate of the grounding electrode is less than 0.075 mm / a and greater than 0.05 mm / a, it is evaluated as level four corrosion, and the corrosion rate of the grounding electrode is too high.

[0037] When the corrosion rate of the grounding electrode is greater than 0.075 mm / a, it is evaluated as level 5 corrosion, and the corrosion rate of the grounding electrode exceeds the standard.

[0038] A device for comprehensively evaluating power grounding corrosion includes: a detection module, an environmental parameter acquisition module, a scoring module, a first summation module, a second summation module, a corrosion rate module, a first corrosion rate increase value module, a second corrosion rate increase value module, a third corrosion rate increase value module, and an evaluation module;

[0039] The detection module is used to detect soil samples at the pre-buried location of the grounding electrode to obtain the first set of macroscopic parameters of the soil samples.

[0040] The environmental parameter acquisition module is used to conduct an environmental survey of the pre-buried location of the grounding electrode to obtain a second set of macroscopic parameters.

[0041] The scoring module is connected to the detection module and the environmental parameter acquisition module respectively, and is used to score each parameter in the first macroscopic parameter group and the second macroscopic parameter group according to the preset score and the correspondence between each parameter in the first macroscopic parameter group and the second macroscopic parameter group, so as to obtain the score corresponding to each parameter.

[0042] The first summation module is connected to the scoring module and is used to sum the scores corresponding to each parameter in the first macro parameter group and the second macro parameter group to obtain the scoring result;

[0043] The corrosion rate module is connected to the first summation module and is used to determine the corrosion rate of the soil sample by means of a preset correspondence between the corrosion rate and the scoring result.

[0044] The first corrosion rate increase value module is used to determine the first corrosion rate increase value of the grounding body by means of the correspondence between the grounding potential difference of the grounding body and the first corrosion rate increase value.

[0045] The second corrosion rate increase module is used to determine the second corrosion rate increase value of the grounding electrode by means of the correspondence between the grounding electrode size, the grounding AC current intensity and the second corrosion rate increase value;

[0046] The third corrosion rate module is used to determine the third corrosion rate increase value of the grounding body by means of the correspondence between the grounding body material, the DC current intensity entering the ground and the third corrosion rate increase value;

[0047] The second summation module is connected to the corrosion rate module, the first corrosion rate increase value module, the second corrosion rate increase value module, and the third corrosion rate increase value module, respectively, and is used to add the corrosion rate of the soil sample, the first corrosion rate increase value, the second corrosion rate increase value, and the third corrosion rate increase value to obtain the corrosion rate of the grounding body;

[0048] The evaluation module is connected to the second summation module and is used to determine the corrosion level of the grounding electrode by means of the correspondence between the corrosion rate and the corrosion level, thereby obtaining the final evaluation result on the corrosion status of the grounding electrode.

[0049] The beneficial effects of this invention are as follows: the performance testing method for air-gap type solid-sealed poles considering environmental humidity provided by the embodiments of this invention includes the following steps: testing soil samples at the pre-buried location of the grounding electrode to obtain a first set of macroscopic parameters for the soil samples; conducting an environmental survey at the pre-buried location of the grounding electrode to obtain a second set of macroscopic parameters; scoring each parameter in the first and second macroscopic parameter sets of the soil samples according to a preset score and the correspondence between the scores and each parameter in the first and second macroscopic parameter sets, obtaining the score corresponding to each parameter in the first and second macroscopic parameter sets; summing the scores corresponding to each parameter in the first and second macroscopic parameter sets to obtain a scoring result; and comparing the preset corrosion rate with the scoring result... The corrosion rate of the soil sample is determined by establishing a correlation between the grounding potential difference and the first corrosion rate increase. The second corrosion rate increase is determined by establishing a correlation between the grounding electrode size, the AC current intensity, and the third corrosion rate increase. The corrosion rate of the soil sample, the first corrosion rate increase, the second corrosion rate increase, and the third corrosion rate increase are then calculated. Finally, the corrosion rate of the grounding electrode is obtained by summing these three increases. The corrosion level of the grounding electrode is determined by establishing a correlation between the corrosion rate and the corrosion level, thus obtaining the final evaluation result regarding the corrosion status of the grounding electrode.

[0050] The method for comprehensively evaluating power grounding corrosion provided in this invention can obtain the degree of influence of each parameter in the first and second macroscopic parameter groups on the corrosion rate of soil samples by scoring the first and second macroscopic parameter groups, thus establishing a correspondence between the scores and the corrosion rate, and thereby obtaining the corrosion rate of the soil samples. Then, by examining the influence of the grounding electrode potential difference, the intensity of the AC current entering the ground, and the intensity of the DC current entering the ground on the corrosion rate, the corresponding relationship between the grounding electrode potential difference, the intensity of the AC current entering the ground, and the intensity of the DC current entering the ground on the corrosion rate is obtained. Furthermore, the corrosion rate caused by the inherent characteristics of the soil samples is superimposed with the influence of the grounding electrode potential difference, the intensity of the AC current entering the ground, and the intensity of the DC current entering the ground on the corrosion rate, resulting in an evaluation result that combines the corrosion properties of the soil itself with the grounding characteristics in the power transmission and transformation field, making the evaluation result more accurate and closer to real working conditions. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 A flowchart illustrating the method for comprehensively evaluating power grounding corrosion; Detailed Implementation

[0053] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] This invention provides a method for comprehensively evaluating power grounding corrosion. Please refer to [link / reference]. Figure 1 , Figure 1 A flowchart illustrating the method for comprehensively evaluating power grounding corrosion;

[0055] In this embodiment, a method for comprehensively evaluating power grounding corrosion is described, such as... Figure 1 As shown, Figure 1 The flowchart for the comprehensive evaluation of power grounding corrosion includes the following steps:

[0056] The first set of macroscopic parameters of the soil samples was obtained by testing the soil samples at the pre-buried location of the grounding electrode, and the second set of macroscopic parameters was obtained by conducting an environmental survey at the pre-buried location of the grounding electrode.

[0057] Based on the preset score and the correspondence between each parameter in the first macroscopic parameter group and the second macroscopic parameter group, each parameter in the first macroscopic parameter group and the second macroscopic parameter group of the soil sample is scored to obtain the score corresponding to each parameter in the first macroscopic parameter group and the second macroscopic parameter group.

[0058] The scores corresponding to each parameter in the first and second macroscopic parameter groups are summed to obtain the scoring results;

[0059] The corrosion rate of the soil sample is determined by the pre-defined correlation between the corrosion rate and the scoring results.

[0060] The increase in the first corrosion rate of the grounding body is determined by the pre-defined relationship between the grounding potential difference of the grounding body and the first corrosion rate.

[0061] The increase in the second corrosion rate of the grounding electrode was determined by the correspondence between the size of the grounding electrode, the intensity of the AC current entering the ground, and the second corrosion rate.

[0062] The increase in the third corrosion rate of the grounding electrode was determined by the correspondence between the grounding electrode material, the intensity of the DC current entering the ground, and the third corrosion rate.

[0063] The corrosion rate of the soil sample, the increase in the first corrosion rate, the increase in the second corrosion rate, and the increase in the third corrosion rate are added together to obtain the corrosion rate of the grounding electrode.

[0064] By establishing the correlation between the corrosion rate and corrosion level of the grounding electrode, the corrosion level of the grounding electrode can be determined, thereby obtaining the final evaluation result on the corrosion status of the grounding electrode.

[0065] In a specific embodiment of the present invention, obtaining the first macroscopic parameter set and the second macroscopic parameter set of the soil sample specifically involves:

[0066] Soil samples from the pre-buried location of the grounding electrode were tested to obtain the first set of macroscopic parameters, including soil texture, soil resistivity, soil pH, Cl ion content, and soil redox potential.

[0067] An environmental survey was conducted at the pre-buried location of the grounding electrode to obtain a second set of macroscopic parameters, including the annual average temperature, annual average precipitation, and average burial depth of groundwater.

[0068] In a specific embodiment of the present invention, the correspondence between the preset score and each parameter in the first macroscopic parameter group is shown in Table 1. Table 1 is the score table of the first macroscopic corrosion index.

[0069]

[0070] Table 1

[0071] In a specific embodiment of the present invention, the correspondence between the preset score and each parameter in the second macroscopic parameter group is shown in Table 2. Table 2 is the score table of the second macroscopic corrosion index.

[0072]

[0073] Table 2

[0074] In a specific embodiment of the present invention, the corrosion rate of the soil sample is determined by a preset correspondence between the corrosion rate and the scoring result, specifically as follows:

[0075] When the score is less than the first preset score, the corrosion rate is less than 0.01 mm / a, and the design value of the corrosion rate is taken as 0.01 mm / a;

[0076] When the score is less than the second preset score but greater than the first preset score, the corrosion rate is less than 0.025 mm / a and greater than 0.01 mm / a, and the design value of the corrosion rate is taken as 0.0175 mm / a.

[0077] When the score is less than the third preset score but greater than the second preset score, the corrosion rate is less than 0.05 mm / a and greater than 0.025 mm / a, and the design value of the corrosion rate is taken as 0.0375 mm / a.

[0078] When the score is less than the fourth preset score but greater than the third preset score, the corrosion rate is less than 0.075 mm / a and greater than 0.05 mm / a, and the design value of the corrosion rate is taken as 0.0675 mm / a.

[0079] When the score is greater than the fourth preset score, the corrosion rate is greater than 0.075 mm / a, and the design value of 0.075 mm / a for the corrosion rate is taken.

[0080] In the specific implementation process, when the scoring result N<-10, the corrosion rate V<0.01mm / a, and the design value of corrosion rate V=0.01mm / a is taken;

[0081] When the score result 0>N≥-10, the corrosion rate 0.025>V≥0.01mm / a, and the design value of corrosion rate V=0.0175mm / a is taken;

[0082] When the score result 10>N≥0, the corrosion rate 0.05>V≥0.025mm / a, and the design value of corrosion rate V=0.0375mm / a is taken;

[0083] When the score result 20>N≥10, the corrosion rate 0.075>V≥0.05mm / a, so the design value of corrosion rate V=0.0675mm / a is taken;

[0084] When the scoring result N≥20, the corrosion rate V>0.075mm / a, so the design value of corrosion rate V=0.075mm / a is taken;

[0085] In another specific embodiment of the present invention, the first corrosion rate increase value (V1) of the grounding body is determined by the correspondence between the preset grounding potential difference of the grounding body and the first corrosion rate increase value (V1), specifically as follows:

[0086] When the grounding potential difference is less than the first preset grounding potential difference, the first corrosion rate increase value is taken as 0.0025 mm / a;

[0087] When the grounding potential difference is greater than the first preset grounding potential difference but less than the second preset grounding potential difference, the first corrosion rate increase value is taken as 0.005 mm / a;

[0088] When the grounding potential difference is greater than the second preset grounding potential difference but less than the third preset grounding potential difference, the first corrosion rate increase value is taken as 0.0075 mm / a;

[0089] When the grounding potential difference is greater than the third grounding potential difference, the first corrosion rate increase value is taken as 0.01 mm / a;

[0090] In the specific implementation process, when the grounding potential difference M < 0.1, the design value of corrosion rate V1 = 0.0025 mm / a is taken;

[0091] When the grounding potential difference is 0.2 > M ≥ 0.1, the design value of corrosion rate is taken as V1 = 0.005 mm / a;

[0092] When the grounding potential difference is 0.3 > M ≥ 0.2, the design value of corrosion rate is taken as V1 = 0.0075 mm / a;

[0093] When the grounding potential difference M≥0.3, the design value of corrosion rate V1=0.01mm / a is taken.

[0094] In a specific embodiment of the present invention, the third corrosion rate increase value (V2) of the grounding electrode is determined by the correspondence between the grounding electrode material, the DC current intensity entering the ground, and the third corrosion rate increase value (V2), as shown in Table 3:

[0095]

[0096] Table 3

[0097] In another specific embodiment of the present invention, the third corrosion rate increase value (V3) of the grounding electrode is determined by the correspondence between the grounding electrode material, the intensity of the DC current flowing into the ground, and the third corrosion rate increase value, as shown in the following formula:

[0098]

[0099] In the formula: A is the atomic weight of the grounding electrode material, n is the valence of the grounding electrode material, and S is the cross-sectional area of ​​the grounding electrode material (cm²). 2 I represents the DC current intensity (A) flowing to ground.

[0100] In another specific embodiment of the present invention, when the corrosion rate of the grounding electrode is less than 0.01 mm / a, it is evaluated as Class I corrosion, and the corrosion rate of the grounding electrode is low.

[0101] When the corrosion rate of the grounding electrode is less than 0.025 mm / a and greater than 0.01 mm / a, it is evaluated as Class II corrosion, and the corrosion rate of the grounding electrode is medium to low.

[0102] When the corrosion rate of the grounding electrode is less than 0.05 mm / a and greater than 0.025 mm / a, it is evaluated as level three corrosion, and the corrosion rate of the grounding electrode is moderate.

[0103] When the corrosion rate of the grounding electrode is less than 0.075 mm / a but greater than 0.05 mm / a, it is evaluated as level four corrosion, indicating that the corrosion rate of the grounding electrode is too high.

[0104] When the corrosion rate of the grounding electrode is greater than 0.075 mm / a, it is evaluated as Level 5 corrosion, which means the corrosion rate of the grounding electrode exceeds the standard.

[0105] The present invention also provides a device for comprehensively evaluating power grounding corrosion, comprising: a detection module, an environmental parameter acquisition module, a scoring module, a first summation module, a second summation module, a corrosion rate module, a first corrosion rate increase value module, a second corrosion rate increase value module, a third corrosion rate increase value module, and an evaluation module;

[0106] The detection module is used to detect soil samples at the pre-buried location of the grounding electrode to obtain the first set of macroscopic parameters of the soil samples;

[0107] The environmental parameter acquisition module is used to conduct an environmental survey of the pre-buried location of the grounding electrode to obtain the second set of macroscopic parameters;

[0108] The scoring module is connected to the detection module and the environmental parameter acquisition module respectively. It is used to score each parameter in the first macroscopic parameter group and the second macroscopic parameter group of the soil sample according to the preset score and the correspondence between each parameter in the first macroscopic parameter group and the second macroscopic parameter group, so as to obtain the score corresponding to each parameter in the first macroscopic parameter group and the second macroscopic parameter group.

[0109] The first summation module is connected to the scoring module and is used to sum the scores corresponding to each parameter in the first macro parameter group and the second macro parameter group to obtain the scoring results.

[0110] The corrosion rate module is connected to the first summation module and is used to determine the corrosion rate of the soil sample by means of a preset correspondence between the corrosion rate and the scoring results.

[0111] The first corrosion rate increase module is used to determine the first corrosion rate increase value of the grounding body by means of the correspondence between the grounding potential difference of the grounding body and the first corrosion rate increase value.

[0112] The second corrosion rate increase module is used to determine the second corrosion rate increase value of the grounding electrode by means of the correspondence between the grounding electrode size, the intensity of the AC current entering the ground and the second corrosion rate increase value;

[0113] The third corrosion rate module is used to determine the third corrosion rate increase value of the grounding electrode by means of the correspondence between the grounding electrode material, the DC current intensity entering the ground and the third corrosion rate increase value;

[0114] The second summation module is connected to the corrosion rate module, the first corrosion rate increase value module, the second corrosion rate increase value module, and the third corrosion rate increase value module, respectively, and is used to add the corrosion rate of the soil sample, the first corrosion rate increase value, the second corrosion rate increase value, and the third corrosion rate increase value to obtain the corrosion rate of the grounding body.

[0115] The evaluation module is connected to the second summation module and is used to determine the corrosion level of the grounding electrode by the correspondence between the corrosion rate and the corrosion level, thereby obtaining the final evaluation result on the corrosion status of the grounding electrode.

[0116] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0117] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0118] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0119] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

Claims

1. A method of evaluating electric power grounding corrosion comprehensively, characterized by, The method comprises the following steps. The soil sample at the pre-buried position of the grounding body is detected to obtain a first macro parameter group including soil texture, soil resistivity, soil pH value, Cl ion content, and soil oxidation-reduction potential in the detection result. An environmental investigation is conducted on the pre-buried position of the grounding body to obtain a second macro parameter group including annual average temperature, annual average precipitation, and average groundwater depth. According to a preset correspondence between a score and each parameter in the first macro parameter group and the second macro parameter group, each parameter in the first macro parameter group and the second macro parameter group is scored to obtain a score corresponding to each parameter. The scores corresponding to each parameter in the first macro parameter group and the second macro parameter group are summed to obtain a score result. According to a preset correspondence between a corrosion rate and the score result, the corrosion rate of the soil sample is determined. According to a preset correspondence between a grounding potential difference of the grounding body and a first corrosion rate increase value, the first corrosion rate increase value of the grounding body is determined. According to a correspondence between a grounding body size, an AC current intensity into the ground, and a second corrosion rate increase value, the second corrosion rate increase value of the grounding body is determined. According to a correspondence between a grounding body material, a DC current intensity into the ground, and a third corrosion rate increase value, the third corrosion rate increase value of the grounding body is determined. The corrosion rate of the soil sample, the first corrosion rate increase value, the second corrosion rate increase value, and the third corrosion rate increase value are added to obtain a corrosion rate of the grounding body. According to a correspondence between the corrosion rate of the grounding body and a corrosion level, the corrosion level of the grounding body is determined, and a final evaluation result about the corrosion condition of the grounding body is obtained. According to the preset correspondence between the grounding potential difference of the grounding body and the first corrosion rate increase value, the first corrosion rate increase value about the grounding body is determined, specifically as follows: When the grounding potential difference is less than a first preset grounding potential difference, the first corrosion rate increase value is 0.0025 mm / a; When the grounding potential difference is greater than the first preset grounding potential difference and less than a second preset grounding potential difference, the first corrosion rate increase value is 0.005 mm / a; When the grounding potential difference is greater than the second preset grounding potential difference and less than a third preset grounding potential difference, the first corrosion rate increase value is 0.0075 mm / a; When the grounding potential difference is greater than the third grounding potential difference, the first corrosion rate increase value is 0.01 mm / a. The formula of the third corrosion rate increase value is: ； In the formula, A is the atomic weight of the grounding body material, n is the valence of the grounding body material, S is the cross-sectional area of the grounding body material, and I is the DC current intensity into the ground.

2. The method for comprehensively evaluating the corrosion of power grounding according to claim 1, characterized in that, According to the preset correspondence between the corrosion rate and the score result, the corrosion rate about the soil sample is determined, specifically as follows: When the score result is less than a first preset score, the corrosion rate is less than 0.01 mm / a, and the design value of the corrosion rate is 0.01 mm / a. When the score result is less than the second preset score and greater than the first preset score, the corrosion rate is less than 0.025 mm / a and greater than 0.01 mm / a, and the design value of the corrosion rate is 0.0175 mm / a; When the score result is less than the third preset score and greater than the second preset score, the corrosion rate is less than 0.05 mm / a and greater than 0.025 mm / a, and the design value of the corrosion rate is 0.0375 mm / a; When the score result is less than the fourth preset score and greater than the third preset score, the corrosion rate is less than 0.075 mm / a and greater than 0.05 mm / a, and the design value of the corrosion rate is 0.0675 mm / a; When the score result is greater than the fourth preset score, the corrosion rate is greater than 0.075 mm / a, and the design value of the corrosion rate is 0.075 mm / a.

3. The method for comprehensive evaluation of corrosion of power grounding according to claim 1, characterized in that, Through the corresponding relationship between the corrosion rate of the grounding body and the corrosion level, the corrosion level of the grounding body is determined, and then the final evaluation result of the corrosion condition of the grounding body is obtained, specifically: When the corrosion rate of the grounding body is less than 0.01 mm / a, the evaluation is first-class corrosion, and the corrosion rate of the grounding body is low; When the corrosion rate of the grounding body is less than 0.025 mm / a and greater than 0.01 mm / a, the evaluation is second-class corrosion, and the corrosion rate of the grounding body is medium-low; When the corrosion rate of the grounding body is less than 0.05 mm / a and greater than 0.025 mm / a, the evaluation is third-class corrosion, and the corrosion rate of the grounding body is moderate; When the corrosion rate of the grounding body is less than 0.075 mm / a and greater than 0.05 mm / a, the evaluation is fourth-class corrosion, and the corrosion rate of the grounding body is high; When the corrosion rate of the grounding body is greater than 0.075 mm / a, the evaluation is fifth-class corrosion, and the corrosion rate of the grounding body is over standard.

4. A device for comprehensive evaluation of corrosion of electric power grounding, applied to the method of any one of claims 1-3, characterized in that, Comprise: a detection module, an environmental parameter acquisition module, a scoring module, a first summation module, a second summation module, a corrosion rate module, a first corrosion rate increase value module, a second corrosion rate increase value module, a third corrosion rate increase value module, and an evaluation module; The detection module is used for detecting the soil sample at the grounding body pre-buried position to obtain a first macroscopic parameter group of the soil sample; The environmental parameter acquisition module is used for investigating the environment at the grounding body pre-buried position to obtain a second macroscopic parameter group; The scoring module is connected with the detection module and the environmental parameter acquisition module, and is used for scoring each parameter in the first macroscopic parameter group and the second macroscopic parameter group according to a preset score and a corresponding relationship between each parameter in the first macroscopic parameter group and the second macroscopic parameter group, to obtain a score corresponding to each parameter; The first summation module is connected with the scoring module, and is used for summing up the scores corresponding to each parameter in the first macroscopic parameter group and the second macroscopic parameter group to obtain a score result; The corrosion rate module is connected with the first summation module, and is used for determining the corrosion rate of the soil sample through a preset corresponding relationship between the corrosion rate and the score result. The first corrosion rate increase value module is configured to determine the first corrosion rate increase value of the grounding body by a preset corresponding relationship between the ground potential difference of the grounding body and the first corrosion rate increase value; The second corrosion rate increase value module is configured to determine the second corrosion rate increase value of the grounding body by a corresponding relationship between the grounding body size, the AC current intensity into the ground and the second corrosion rate increase value; The third corrosion rate increase value module is configured to determine the third corrosion rate increase value of the grounding body by a corresponding relationship between the grounding body material, the DC current intensity into the ground and the third corrosion rate increase value; The second summation module is connected with the corrosion rate module, the first corrosion rate increase value module, the second corrosion rate increase value module and the third corrosion rate increase value module respectively, and is configured to add the corrosion rate of the soil sample, the first corrosion rate increase value, the second corrosion rate increase value and the third corrosion rate increase value to obtain the corrosion rate of the grounding body; The evaluation module is connected with the second summation module, and is configured to determine the corrosion level of the grounding body by a corresponding relationship between the corrosion rate of the grounding body and the corrosion level, and further obtain the final evaluation result about the corrosion condition of the grounding body.

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