Grounding grid state detection method and device, computer equipment and readable storage medium

Abstract

The invention relates to a grounding grid state detection method and device, computer equipment and a readable storage medium. The method comprises the steps of obtaining grounding resistance information of a grounding grid; detecting a first state evaluation result of the grounding grid according to the grounding resistance information; when the first state evaluation result represents that the grounding grid is in an abnormal state, performing local corrosion fracture evaluation on the grounding grid to obtain a second state evaluation result; and detecting the target state of the grounding grid according to the first state evaluation result and the second state evaluation result. By adopting the method, the state of the grounding grid can be accurately evaluated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of smart grid, in particular to a grounding grid state detection method and device, computer equipment and readable storage medium. BACKGROUND

[0002] As a core component of substation facilities, the grounding grid assumes the dual functions of equipment grounding and safety protection. It forms equipotential connection between the station facilities and the ground through a metal conductor network, thereby ensuring the stable operation of the power system and preventing the risk of electric shock. Therefore, it is particularly important to detect the state of the grounding grid.

[0003] In the traditional technology, since the grounding grid is deeply buried underground, the state information of the grounding grid is mainly obtained by relying on electric or magnetic signals for indirect judgment. For example, the grounding resistance information of the grounding grid can be obtained by using the grounding resistance monitoring method, and the state of the grounding grid can be evaluated by using the threshold analysis method according to the grounding resistance information.

[0004] However, the current grounding grid state detection method has the problem of inaccuracy. SUMMARY

[0005] Therefore, it is necessary to provide an accurate grounding grid state detection method, device, computer equipment, computer readable storage medium and computer program product to solve the above technical problems.

[0006] In a first aspect, the present application provides a grounding grid state detection method, comprising:

[0007] obtaining grounding resistance information of the grounding grid;

[0008] detecting a first state evaluation result of the grounding grid according to the grounding resistance information;

[0009] when the first state evaluation result represents that the grounding grid is in an abnormal state, performing local corrosion and fracture evaluation on the grounding grid to obtain a second state evaluation result;

[0010] detecting a target state of the grounding grid according to the first state evaluation result and the second state evaluation result.

[0011] In one embodiment, the abnormal state at least includes a fluctuation state, an abnormal state and a fault state; detecting the first state evaluation result of the grounding grid according to the grounding resistance information, comprising:

[0012] when the grounding resistance information is less than a preset first resistance threshold, it is detected that the first state evaluation result of the grounding grid represents that the grounding grid is in a normal state;

[0013] When the grounding resistance information is greater than the preset first resistance threshold and less than the preset second resistance threshold, the first state evaluation result of the grounding grid detected indicates that the grounding grid is in a fluctuation state;

[0014] When the grounding resistance information is greater than the preset second resistance threshold and less than the preset third resistance threshold, the first state evaluation result of the grounding grid detected indicates that the grounding grid is in an abnormal state;

[0015] When the grounding resistance information is greater than the preset third resistance threshold, the first state evaluation result of the grounding grid detected indicates that the grounding grid is in a fault state.

[0016] In one of the embodiments, a local corrosion fracture evaluation is performed on the grounding grid to obtain a second state evaluation result, including:

[0017] Injecting an alternating frequency current into the grounding grid;

[0018] In the case of extracting the alternating frequency current from the preset first extraction point and the preset second extraction point of the grounding grid, obtaining first corrosion characteristic information of the preset first extraction point and second corrosion characteristic information of the preset second extraction point;

[0019] According to the first corrosion characteristic information and the second corrosion characteristic information, detecting a second state evaluation result of the grounding grid.

[0020] In one of the embodiments, at least one monitoring point is arranged in a preset spatial range corresponding to the preset first extraction point; obtaining the first corrosion characteristic information of the preset first extraction point includes:

[0021] Obtaining ground magnetic field intensity information of the at least one monitoring point and standard ground magnetic field intensity information of the at least one monitoring point in the case of no corrosion;

[0022] For each monitoring point, according to the standard ground magnetic field intensity information and the ground magnetic field intensity information, detecting ground magnetic field intensity change information of the monitoring point;

[0023] According to cumulative information of the ground magnetic field intensity change information of all the monitoring points, detecting the first corrosion characteristic information of the preset first extraction point.

[0024] In one of the embodiments, according to the first corrosion characteristic information and the second corrosion characteristic information, detecting a second state evaluation result of the grounding grid includes:

[0025] When the first corrosion characteristic information is less than a preset first corrosion characteristic threshold, and the second corrosion characteristic information is less than a preset second corrosion characteristic threshold, the second state evaluation result of the grounding grid detected indicates that the grounding grid is in a normal state;

[0026] When the first corrosion feature information is greater than or equal to the preset first corrosion feature threshold and less than the preset third corrosion feature threshold, and the second corrosion feature information is greater than or equal to the preset second corrosion feature threshold and less than the preset fourth corrosion feature threshold, the second state evaluation result of the grounding grid detected represents that the grounding grid is in a fluctuation state;

[0027] When the first corrosion feature information is greater than or equal to the preset third corrosion feature threshold and less than the preset fifth corrosion feature threshold, and the second corrosion feature information is greater than or equal to the preset fourth corrosion feature threshold and less than the preset sixth corrosion feature threshold, the second state evaluation result of the grounding grid detected represents that the grounding grid is in an abnormal state;

[0028] When the first corrosion feature information is greater than the preset fifth corrosion feature threshold, and the second corrosion feature information is greater than the preset sixth corrosion feature threshold, the second state evaluation result of the grounding grid detected represents that the grounding grid is in a fault state.

[0029] In one of the embodiments, the first state evaluation result and the second state evaluation result include the first state evaluation result and the second state evaluation result respectively corresponding to each of the plurality of iteration evaluation processes; the first state evaluation result at least includes a first state evaluation level, and the second state evaluation result at least includes a second state evaluation level;

[0030] According to the first state evaluation result and the second state evaluation result, detecting a target state of the grounding grid, comprising:

[0031] When the first state evaluation level corresponding to the target iteration evaluation process is the same as the second state evaluation level corresponding to the target iteration evaluation process in all iteration evaluation processes, it is determined that the target state of the grounding grid in the target iteration evaluation process is the first state evaluation level, and the first state evaluation level is the final state of the grounding grid;

[0032] When the first state evaluation level corresponding to each of the iteration evaluation processes is lower than the second state evaluation level corresponding to the same iteration evaluation process, or the second state evaluation level corresponding to each of the iteration evaluation processes is lower than the first state evaluation level corresponding to the same iteration evaluation process, it is determined that the target state of the grounding grid is a first transition state, wherein the first transition state is a transition state tending to change to a state evaluation level with a lower level between the first state evaluation level and the second state evaluation level;

[0033] When the first state evaluation level corresponding to each of the iteration evaluation processes is unchanged, and the second state evaluation level corresponding to the same iteration evaluation process changes from being lower than the first state evaluation level to being higher than the first state evaluation level, it is determined that the target state of the grounding grid is a second transition state, wherein the second transition state is a transition state tending to change to the changed second state evaluation level;

[0034] When the second state evaluation level corresponding to each of the iterative evaluation processes remains unchanged, and the first state evaluation level corresponding to the same iterative evaluation process changes from lower than the second state evaluation level to higher than the second state evaluation level, the target state of the grounding grid is determined to be the third transition state, wherein the third transition state tends to be a transition state that changes to the changed first state evaluation level.

[0035] Secondly, this application also provides a grounding grid condition detection device, comprising:

[0036] The resistance acquisition module is used to acquire the grounding resistance information of the grounding grid;

[0037] The preliminary assessment module is used to detect the first-state assessment result of the grounding grid based on the grounding resistance information;

[0038] The secondary evaluation module is used to evaluate the local corrosion and fracture of the grounding grid when the first state evaluation result indicates that the grounding grid is in an abnormal state, and to obtain the second state evaluation result.

[0039] The final evaluation module is used to detect the target state of the grounding grid based on the first state evaluation results and the second state evaluation results.

[0040] Thirdly, this application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0041] Obtain the grounding resistance information of the grounding grid;

[0042] Based on the grounding resistance information, detect the first state assessment result of the grounding grid;

[0043] When the first state assessment result indicates that the grounding grid is in an abnormal state, a local corrosion and fracture assessment of the grounding grid is performed to obtain the second state assessment result.

[0044] Based on the results of the first and second state assessments, the target state of the grounding grid is detected.

[0045] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the following steps:

[0046] Obtain the grounding resistance information of the grounding grid;

[0047] Based on the grounding resistance information, detect the first state assessment result of the grounding grid;

[0048] When the first state assessment result indicates that the grounding grid is in an abnormal state, a local corrosion and fracture assessment of the grounding grid is performed to obtain the second state assessment result.

[0049] Based on the results of the first and second state assessments, the target state of the grounding grid is detected.

[0050] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, performs the following steps:

[0051] Obtain the grounding resistance information of the grounding grid;

[0052] Based on the grounding resistance information, detect the first state assessment result of the grounding grid;

[0053] When the first state assessment result indicates that the grounding grid is in an abnormal state, a local corrosion and fracture assessment of the grounding grid is performed to obtain the second state assessment result.

[0054] Based on the results of the first and second state assessments, the target state of the grounding grid is detected.

[0055] The aforementioned grounding grid condition detection method, apparatus, computer equipment, computer-readable storage medium, and computer program product acquire grounding resistance information of the grounding grid; based on the grounding resistance information, detect the first state assessment result of the grounding grid; when the first state assessment result indicates that the grounding grid is in an abnormal state, perform a local corrosion and fracture assessment on the grounding grid to obtain a second state assessment result; based on the first state assessment result and the second state assessment result, detect the target state of the grounding grid. Throughout the process, the grounding grid condition is assessed from both grounding resistance information and local corrosion and fracture aspects, overcoming the shortcomings of traditional grounding resistance checks which are easily affected by environmental factors or measurement voltage, and enabling a more accurate assessment of the grounding grid condition. Attached Figure Description

[0056] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 This is an application environment diagram of the grounding grid status detection method in one embodiment;

[0058] Figure 2 This is a flowchart illustrating a grounding grid status detection method in one embodiment;

[0059] Figure 3 This is a flowchart illustrating the grounding grid status detection method in another embodiment;

[0060] Figure 4 This is a flowchart illustrating the grounding grid status detection method in yet another embodiment;

[0061] Figure 5 This is a structural block diagram of a grounding grid status detection device in one embodiment;

[0062] Figure 6 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application.

[0064] The grounding grid status detection method provided in this application embodiment can be applied to, for example... Figure 1 In the application environment shown, terminal 102 communicates with server 104 via a network. A data storage system can store the data that server 104 needs to process. The data storage system can be integrated onto server 104, or it can be located in the cloud or on another network server.

[0065] The user triggers a status detection control on the grounding grid status detection interface of terminal 102. Terminal 102 responds to the trigger request of the status detection control, generates a grounding grid status detection request, and sends the grounding grid status detection request to server 104. Server 104 obtains the grounding grid status detection request and acquires the grounding resistance information of the grounding grid in real time from the database or by controlling sensors. Based on the grounding resistance information, it detects the first status assessment result of the grounding grid. When the first status assessment result indicates that the grounding grid is in an abnormal state, it performs a local corrosion and fracture assessment of the grounding grid to obtain a second status assessment result. Based on the first and second status assessment results, it detects the target status of the grounding grid. Furthermore, server 104 can push the target status of the grounding grid to terminal 102.

[0066] The terminal 102 can be, but is not limited to, various personal computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. IoT devices can include smart speakers, smart TVs, smart air conditioners, smart in-vehicle systems, and projection devices. Portable wearable devices can include smartwatches, smart bracelets, and head-mounted displays. Head-mounted displays can be virtual reality (VR) devices, augmented reality (AR) devices, and smart glasses. The server 104 can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing cloud computing services.

[0067] In one exemplary embodiment, such as Figure 2 As shown, a grounding grid status detection method is provided, which is applied to... Figure 1 Taking server 104 as an example for explanation. Wherein:

[0068] S200: Obtain the grounding resistance information of the grounding grid.

[0069] Among them, grounding resistance is the resistance formed when current flows from the grounding grid into the earth and then flows back to the distant zero potential point.

[0070] Specifically, to obtain the grounding resistance information of the grounding grid, firstly, the grounding resistance information of the grounding grid is judged, and the judgment result can facilitate a preliminary assessment of the state of the grounding grid.

[0071] In practical applications, the grounding resistance information of the grounding grid can be obtained by measuring using standard methods. Commonly used methods include the three-electrode method (arranging grounding grid test points, current electrodes, and voltage electrodes), the two-electrode method (requiring grounding grid test points and distant grounding electrodes to replace current and voltage electrodes), or the four-electrode method (adding an auxiliary voltage electrode to the three-electrode method). It is important to avoid proximity to interference sources such as metal pipes and cable trenches, and to repeat the measurement multiple times and take the average value to eliminate measurement errors.

[0072] S400 detects the first state assessment result of the grounding grid based on the grounding resistance information.

[0073] Specifically, based on the grounding resistance information of the grounding grid, a preliminary assessment of the grounding grid's state is performed to obtain the first state assessment result. Generally, this preliminary assessment of the grounding grid's state can be achieved using a threshold method. For example, a grounding resistance threshold is set, and the grounding resistance information is compared with the threshold to obtain the first state assessment result. In practical applications, the first state assessment result can be represented in the form of a grade or a score.

[0074] S600: When the first state assessment result indicates that the grounding grid is in an abnormal state, a local corrosion and fracture assessment of the grounding grid is performed to obtain the second state assessment result.

[0075] Specifically, the first-state assessment result can characterize the grounding grid in various different states, such as normal and abnormal states. The abnormal state can be further divided into multiple sub-states. The first-state assessment result is a preliminary state assessment result. When the first-state assessment result indicates that the grounding grid is in a normal state, no further assessment of the grounding grid is required. When the first-state assessment result indicates that the grounding grid is in an abnormal state, further assessment of the grounding grid in the abnormal state is required.

[0076] In other words, when the first state assessment result indicates that the grounding grid is in an abnormal state, a local corrosion fracture assessment is performed on the grounding grid to obtain corrosion characteristic information. Based on the corrosion characteristic information, the state of the grounding grid is reassessed to obtain the second state assessment result.

[0077] S800 detects the target state of the grounding grid based on the results of the first state assessment and the second state assessment.

[0078] Specifically, by combining the results of the first-state assessment and the second-state assessment, a comprehensive evaluation is conducted on the grounding resistance information and the impact of localized corrosion and fracture to obtain the target state of the grounding grid. This combination can be achieved using a comprehensive weighted method, which involves pre-setting the weights of the first-state and second-state assessment results and then weighting them according to these pre-set weights to obtain the target state of the grounding grid.

[0079] In the aforementioned grounding grid condition detection method, grounding resistance information of the grounding grid is obtained; based on the grounding resistance information, a first state assessment result of the grounding grid is detected; when the first state assessment result indicates that the grounding grid is in an abnormal state, a local corrosion and fracture assessment is performed on the grounding grid to obtain a second state assessment result; based on the first state assessment result and the second state assessment result, the target state of the grounding grid is detected. Throughout the process, the grounding grid condition is assessed from both grounding resistance information and local corrosion and fracture aspects, overcoming the shortcomings of traditional grounding resistance checks which are easily affected by environmental factors or measurement voltage, and enabling a more accurate assessment of the grounding grid condition.

[0080] In an exemplary embodiment, the abnormal state includes at least a fluctuating state, an abnormal state, and a fault state; based on the grounding resistance information, the first state assessment result of the grounding grid is detected, including:

[0081] When the grounding resistance information is less than a preset first resistance threshold, the first state evaluation result of the grounding grid indicates that the grounding grid is in a normal state; when the grounding resistance information is greater than the preset first resistance threshold and less than a preset second resistance threshold, the first state evaluation result of the grounding grid indicates that the grounding grid is in a fluctuating state; when the grounding resistance information is greater than the preset second resistance threshold and less than a preset third resistance threshold, the first state evaluation result of the grounding grid indicates that the grounding grid is in an abnormal state; when the grounding resistance information is greater than the preset third resistance threshold, the first state evaluation result of the grounding grid indicates that the grounding grid is in a fault state.

[0082] Specifically, the first state assessment result can include normal state and abnormal state, and the abnormal state can include at least normal state, fluctuating state, abnormal state and fault state.

[0083] The evaluation criteria for the grounding grid are categorized into normal, fluctuating, abnormal, and fault states, increasing in severity. When the first state assessment result is normal, it is preliminarily determined that the grounding grid is normal, structurally intact, reliably connected, and effectively provides current dissipation protection. When the first state assessment result is fluctuating, it is preliminarily determined that the grounding grid values ​​fluctuate within the acceptable range, with no structural damage, representing only a temporary change that does not affect normal equipment operation or personal safety. When the first state assessment result is abnormal, it is preliminarily determined that the grounding grid has potential risks, possibly caused by mild corrosion of the grounding electrode, failure of the resistance-reducing agent, or significant changes in soil resistivity, resulting in a decline in grounding grid function, requiring timely investigation and rectification. When the first state assessment result is fault, it is preliminarily determined that the grounding grid has clear safety hazards, potentially leading to increased ground potential, equipment damage, and the risk of electric shock to personnel, requiring immediate shutdown and maintenance to restore the grounding grid's normal function.

[0084] Therefore, it is necessary to detect the state of the grounding grid based on the grounding resistance information to obtain the first state assessment result of the grounding grid.

[0085] When the grounding resistance information is less than the preset first resistance threshold, the grounding grid is initially considered to be in a normal state. At this time, the state of the grounding grid is initially marked as normal. The preset first resistance threshold can be 50mΩ. This application does not limit the value of any threshold. Any threshold listed is just an example.

[0086] When the grounding resistance information is greater than the preset first resistance threshold and less than the preset second resistance threshold, it is initially considered that the grounding grid is in a fluctuating state. At this time, the state of the grounding grid is initially marked as a fluctuating state, and the optional second resistance threshold is 200mΩ.

[0087] When the grounding resistance information is greater than the preset second resistance threshold and less than the preset third resistance threshold, the grounding grid is initially considered to be in a normal state. At this time, the state of the grounding grid is initially marked as an abnormal state. The optional preset third resistance threshold is 1Ω.

[0088] When the grounding resistance information is greater than the preset third resistance threshold, the grounding grid is initially considered to be in a fault state, and the state of the grounding grid is initially marked as a fault state.

[0089] In the above embodiments, by setting multiple resistance thresholds, the state of the grounding grid can be preliminarily judged in a more granular manner, making the first state assessment result of the grounding grid more accurate.

[0090] In one exemplary embodiment, such as Figure 3 As shown, S600 includes:

[0091] S620: When the first state assessment result indicates that the grounding grid is in an abnormal state, inject a different frequency current into the grounding grid.

[0092] S640, when different frequency currents are extracted from the preset first extraction point and the preset second extraction point of the grounding grid, the first corrosion characteristic information of the preset first extraction point and the second corrosion characteristic information of the preset second extraction point are obtained.

[0093] S660, based on the first corrosion characteristic information and the second corrosion characteristic information, detects the second state assessment result of the grounding grid.

[0094] Specifically, when the first state assessment indicates that the grounding grid is in an abnormal state, further assessment of the grounding grid is required. First, a different frequency current needs to be injected into the grounding grid, with the injection point being the center of the grounding grid. A preset first extraction point and a preset second extraction point are then set. In practical applications, the extraction points are selected at the upper right corner and lower right corner of the grounding grid, respectively. Other extraction points can also be selected; the number and location of extraction points are not limited here.

[0095] When different frequency currents are extracted from the grounding grid at the preset first extraction point and the preset second extraction point, the first corrosion characteristic information of the preset first extraction point and the second corrosion characteristic information of the preset second extraction point are obtained.

[0096] It should be noted that when a different frequency current is passed through the conductors of a grounding grid, a stable and regular magnetic field of induction intensity is formed on the ground surface. When the grounding grid experiences localized corrosion (reduced conductor cross-sectional area) or fracture, the current flow path changes, and the corresponding magnetic field of induction intensity on the ground surface will also show anomalies, such as signal amplitude attenuation at the corrosion site, or signal abrupt changes or drops at the fracture site. Therefore, by detecting the corrosion characteristics of multiple extraction points (usually accessible nodes such as grounding down conductors), the current conduction state of the grounding grid in different areas can be reflected. By combining the corrosion characteristics of these points, the one-sidedness of single-point detection can be avoided, and an accurate assessment of the grounding grid condition can be achieved.

[0097] By combining the first corrosion characteristic information of the preset first extraction point with the second corrosion characteristic information of the preset second extraction point, the state of the grounding grid is assessed for local corrosion and fracture, and the second state assessment result of the grounding grid is obtained.

[0098] In this embodiment, by injecting different frequency currents into the grounding grid and integrating the corrosion characteristic information corresponding to multiple extraction points, the local corrosion fracture assessment of the grounding grid can be performed more accurately, and the second state assessment result obtained is also more accurate.

[0099] In an exemplary embodiment, at least one monitoring point is provided within a preset spatial range corresponding to the preset first extraction point; obtaining the first corrosion characteristic information of the preset first extraction point includes:

[0100] Acquire surface magnetic field strength information at at least one monitoring point, and standard surface magnetic field strength information at at least one monitoring point under non-corrosion conditions; for each monitoring point, detect the change information of surface magnetic field strength at the monitoring point based on the standard surface magnetic field strength information and the surface magnetic field strength information; based on the cumulative information of the change information of surface magnetic field strength at all monitoring points, detect the first corrosion characteristic information of the preset first extraction point.

[0101] Specifically, at least one monitoring point is set within a preset space range corresponding to the first extraction point. After injecting a different frequency current into the grounding grid, the fluxgate sensor installed on the ground surface collects the ground magnetic field signal of the monitoring point corresponding to each extraction point of the grounding grid, and sends the collected ground magnetic field signal of each monitoring point in the grounding grid to the server.

[0102] In this embodiment, taking the first extraction point as an example, the server obtains the surface magnetic field strength information of at least one monitoring point, and obtains the standard surface magnetic field strength information of at least one monitoring point under non-corrosion conditions from the database. The surface magnetic field strength information of all monitoring points is compared with the standard surface magnetic field strength information to obtain the first corrosion characteristic information of the first extraction point.

[0103] More specifically, comparing the surface magnetic field strength information of all monitoring points with the standard surface magnetic field strength information means using the Manhattan distance function to calculate the first corrosion characteristic information of the first extraction point based on the surface magnetic field strength information of all monitoring points and the standard surface magnetic field strength information.

[0104] Its corrosion characteristic information M f The calculation expression can be:

[0105]

[0106] Among them, Y i F represents the standard surface magnetic field strength information of the i-th monitoring point in the grounding grid before corrosion occurred. i This represents the surface magnetic field strength information at the i-th monitoring point in the grounding grid after corrosion. The above expression can be used to calculate the first corrosion characteristic information at the first extraction point.

[0107] It can be seen that, in essence, detecting the first corrosion characteristic information of the preset first extraction point is to detect the change information of the surface magnetic field strength at the monitoring point based on the standard surface magnetic field strength information and the surface magnetic field strength information, and then to detect the first corrosion characteristic information of the preset first extraction point based on the cumulative information of the change information of the surface magnetic field strength at all monitoring points. Therefore, it can be considered that the corrosion characteristic information of the extraction point represents the cumulative effect of the change in the surface magnetic field strength corresponding to the corroded conductor segment in the grounding grid.

[0108] In one embodiment, surface magnetic field strength information at at least one monitoring point is acquired. This surface magnetic field strength information comprises two physical components: one is the magnetic field component formed by the axial conduction current of the conductor, and the other is the magnetic field component formed by the diffuse current in the soil medium. The magnetic field calculation for the conductor current component can be performed analytically using the Biot-Savart law. This classical method accurately describes the magnetic field distribution of a current-carrying conductor. For example, the expression for obtaining the magnetic field component formed by the axial conduction current of the conductor is as follows:

[0109]

[0110] in, It represents the magnetic induction intensity generated by the axial current of the line element at the field point on the ground, which is the magnetic field component formed by the axial conduction current of the conductor. denoted as axial current of the grounding grid conductor element; r is the position vector between the source point of the element and the field point on the ground surface; μ0 is the permeability constant in vacuum; dl is the differential of l; l is the length of the superstructure; the subscript e denotes unit length.

[0111] In the above embodiments, by comparing the surface magnetic field strength information of at least one monitoring point with the standard surface magnetic field strength information of at least one monitoring point under non-corrosive conditions, the first corrosion characteristic information of the preset first extraction point can be accurately detected, thereby improving the accuracy of corrosion fracture assessment of the grounding grid; furthermore, the corrosion characteristic information of the extraction point is calculated using the Manhattan distance function, which can eliminate the error caused by taking the square root approximation during the Euclidean distance calculation, reduce the overall workload of the computer and improve work efficiency.

[0112] In an exemplary embodiment, the second state assessment result of the grounding grid is detected based on the first corrosion characteristic information and the second corrosion characteristic information, including:

[0113] When the first corrosion characteristic information is less than a preset first corrosion characteristic threshold and the second corrosion characteristic information is less than a preset second corrosion characteristic threshold, the second state evaluation result of the grounding grid indicates that the grounding grid is in a normal state. When the first corrosion characteristic information is greater than or equal to the preset first corrosion characteristic threshold and less than the preset third corrosion characteristic threshold, and the second corrosion characteristic information is greater than or equal to the preset second corrosion characteristic threshold and less than the preset fourth corrosion characteristic threshold, the second state evaluation result of the grounding grid indicates that the grounding grid is in a fluctuating state. When the first corrosion characteristic information is greater than or equal to the preset third corrosion characteristic threshold and less than the preset fifth corrosion characteristic threshold, and the second corrosion characteristic information is greater than or equal to the preset fourth corrosion characteristic threshold and less than the preset sixth corrosion characteristic threshold, the second state evaluation result of the grounding grid indicates that the grounding grid is in an abnormal state. When the first corrosion characteristic information is greater than the preset fifth corrosion characteristic threshold and the second corrosion characteristic information is greater than the preset sixth corrosion characteristic threshold, the second state evaluation result of the grounding grid indicates that the grounding grid is in a fault state.

[0114] Specifically, by combining the first corrosion characteristic information and the second corrosion characteristic information, the condition of the grounding grid can be detected at a deeper level.

[0115] Specifically, when the first corrosion feature information is less than a preset first corrosion feature threshold and the second corrosion feature information is less than a preset second corrosion feature threshold, the grounding grid is further assessed to be in a normal state. At this time, the state of the grounding grid is marked as normal. Optionally, the preset first corrosion feature threshold is 0.2 and the preset second corrosion feature threshold is 0.15. Similarly, this application does not limit the value of any threshold, and any threshold listed is just an example.

[0116] When the first corrosion feature information is greater than or equal to the preset first corrosion feature threshold and less than the preset third corrosion feature threshold, and the second corrosion feature information is greater than or equal to the preset second corrosion feature threshold and less than the preset fourth corrosion feature threshold, the grounding grid is further assessed to be in a fluctuating state. At this time, the state of the grounding grid is marked as a fluctuating state. Optionally, the preset third corrosion feature threshold is 19 and the preset fourth corrosion feature threshold is 17.

[0117] When the first corrosion feature information is greater than or equal to the preset third corrosion feature threshold and less than the preset fifth corrosion feature threshold, and the second corrosion feature information is greater than or equal to the preset fourth corrosion feature threshold and less than the preset sixth corrosion feature threshold, the grounding grid is further assessed to be in an abnormal state. At this time, the state of the grounding grid is marked as an abnormal state. Optionally, the preset fifth corrosion feature threshold is 70 and the preset sixth corrosion feature threshold is 50.

[0118] When the first corrosion characteristic information is greater than the preset fifth corrosion characteristic threshold and the second corrosion characteristic information is greater than the preset sixth corrosion characteristic threshold, the grounding grid is further assessed to be in a fault state. At this time, the state of the grounding grid is marked as a fault state.

[0119] In the above embodiments, by pre-setting corrosion characteristic information of two extraction points, the state of the grounding grid can be further evaluated, which can solve the problem of inaccurate grounding grid state detection caused by relying solely on grounding resistance information, and improve the accuracy of grounding grid state detection.

[0120] In one exemplary embodiment, such as Figure 3 As shown, the first state evaluation result and the second state evaluation result include the first state evaluation result and the second state evaluation result corresponding to each of the multiple iterative evaluation processes; the first state evaluation result includes at least the first state evaluation level, and the first state evaluation result includes at least the second state evaluation level; as shown... Figure 4 As shown, S800 includes:

[0121] S820, when there is a first state evaluation level corresponding to the target iterative evaluation process that is the same as the second state evaluation level corresponding to the target iterative evaluation process in all iterative evaluation processes, the target state of the grounding grid in the target iterative evaluation process is determined to be the first state evaluation level, and the first state evaluation level is the final state of the grounding grid.

[0122] S840, when the first state evaluation level corresponding to each of all iterative evaluation processes is lower than the second state evaluation level corresponding to the same iterative evaluation process, or when the second state evaluation level corresponding to each of all iterative evaluation processes is lower than the first state evaluation level corresponding to the same iterative evaluation process, the target state of the grounding grid is determined to be the first transition state, wherein the first transition state is a transition state that tends to change to the lower of the first state evaluation level and the second state evaluation level.

[0123] S860, when the first state evaluation level corresponding to each of the iterative evaluation processes remains unchanged, and the second state evaluation level corresponding to the same iterative evaluation process changes from lower than the first state evaluation level to higher than the first state evaluation level, the target state of the grounding grid is determined to be the second transition state, wherein the second transition state is a transition state that tends to change to the changed second state evaluation level.

[0124] S880, when the second state evaluation level corresponding to each of the iterative evaluation processes remains unchanged, and the first state evaluation level corresponding to the same iterative evaluation process changes from lower than the second state evaluation level to higher than the second state evaluation level, the target state of the grounding grid is determined to be the third transition state, wherein the third transition state tends to be a transition state that changes to the changed first state evaluation level.

[0125] Specifically, the accuracy of grounding grid assessment based solely on grounding resistance information or localized corrosion fracture assessment is still insufficient. Therefore, this application can combine the first state assessment result obtained through grounding resistance information with the second state assessment result obtained through localized corrosion fracture assessment to detect the target state of the grounding grid.

[0126] Furthermore, this application replaces a single evaluation with multiple iterative evaluations of the grounding grid's state, obtaining a first-state evaluation result and a second-state evaluation result in each iteration. The first-state evaluation result is represented by a first-state evaluation level, and the second-state evaluation result is represented by a second-state evaluation level. In practical applications, each iterative evaluation process can be determined according to a preset time interval t, and the maximum number of iterations can be preset. The iteration stops when the preset maximum number of iterations is reached.

[0127] The first and second state assessment levels include normal state, fluctuating state, abnormal state, and fault state, respectively. The levels decrease sequentially in the order of normal state, fluctuating state, abnormal state, and fault state, with normal state being the highest level and fault state being the lowest level.

[0128] When the first state evaluation level and the second state evaluation level are the same for the same target iterative evaluation process in all iterative evaluation processes, the target state of the grounding grid in the target iterative evaluation process is determined to be the first state evaluation level or the second state evaluation level, and the first state evaluation level is the final state of the grounding grid. At this time, no further iteration is required.

[0129] When the first state evaluation level corresponding to each of all iterative evaluation processes is lower than the second state evaluation level corresponding to the same iterative evaluation process, or when the second state evaluation level corresponding to each of all iterative evaluation processes is lower than the first state evaluation level corresponding to the same iterative evaluation process, that is, the first state evaluation level based on grounding resistance information and the second state evaluation level based on local corrosion fracture evaluation are considered independently. When a certain state evaluation level is consistently lower than another state evaluation level in all iterative evaluation processes, the target state of the grounding grid is considered to be on the edge of a lower level, that is, a transitional state that tends to change to the lower of the first and second state evaluation levels.

[0130] When the first state evaluation level corresponding to each of the iterative evaluation processes remains unchanged, and the second state evaluation level corresponding to the same iterative evaluation process changes from below the first state evaluation level to above the first state evaluation level; or, when the second state evaluation level corresponding to each of the iterative evaluation processes remains unchanged, and the first state evaluation level corresponding to the same iterative evaluation process changes from below the second state evaluation level to above the second state evaluation level, that is, the first state evaluation level based on grounding resistance information and the second state evaluation level based on local corrosion fracture assessment are considered independently. When the state evaluation level of one side remains unchanged, and the state evaluation level of the other side changes from below the unchanged state evaluation level to above the unchanged state evaluation level, the target state of the grounding grid is considered to be on the edge of a higher-level state, that is, tending to change towards the state evaluation level after the change between the two sides, that is, a transitional state of changing to a higher-level state evaluation level.

[0131] In the above embodiments, by judging the first state evaluation result and the second state evaluation result of the grounding grid in the multiple iterative evaluation process, the target state of the grounding grid can be accurately determined, and it can be detected whether the grounding grid is in a transitional state towards a lower or higher level or a final stable state.

[0132] In an exemplary embodiment, the corrosion characteristic values ​​of the actual grounding grid under mild and moderate corrosion can also be calculated based on the relative corrosion fracture patterns of mild and moderate corrosion of the mesh grounding grid.

[0133] To better describe the grounding grid status detection method of this application, a specific application example will be used below to describe the grounding grid status detection method in detail, including:

[0134] S1. Obtain the grounding resistance value R of the grounding grid.

[0135] When R < 50mΩ, record R and mark the first state evaluation result of the grounding grid as normal state;

[0136] When 50mΩ < R < 200mΩ, record R and mark the first state evaluation result of the grounding grid as fluctuating state;

[0137] When 200mΩ < R < 1Ω, record R and mark the first state evaluation result of the grounding grid as an abnormal state;

[0138] When R > 1Ω, record R and mark it as the state (fault). Mark the first state evaluation result of the grounding grid as the fault state.

[0139] S2. For cases where the resistance exceeds the normal range, further investigation is needed: Inject a different frequency current into the grounding grid, with the injection point at the center of the grounding grid and the extraction points selected at the upper right and lower right corners respectively; collect the surface magnetic field signal F from at least one monitoring point corresponding to each extraction point, as collected by the fluxgate sensor installed on the ground surface. i And the surface magnetic field signal Y of at least one monitoring point corresponding to each extraction point when the grounding grid is fault-free, and the previously stored grounding grid has no faults. i By comparing the data one by one, the change information of the surface magnetic field intensity of each monitoring point is obtained. Based on the cumulative information of the change information of the surface magnetic field intensity of all monitoring points corresponding to the same extraction point, the corrosion characteristic information of the corresponding extraction point is obtained.

[0140] Define the first corrosion feature information when extracted from the upper right corner as M. f1 The second corrosion feature information when extracted from the lower right corner is M. f2 .

[0141] When M f1 <0.2, M f2 When <0.15, the second state evaluation result of the marked grounding grid is normal.

[0142] When 0.2 <M f1 <19、0.15 <M f2 When the value is less than 17, the second state assessment result of the marked grounding grid is a fluctuating state;

[0143] When 19 <M f1 <70、17 <M f2 When <50, the second state evaluation result of the marked grounding grid is an abnormal state;

[0144] When 70 <M f1 50 <M f2 At that time, the second state assessment result of the marked grounding grid is a fault state.

[0145] S3. The impact of the first state assessment result obtained from the grounding resistance and the second state assessment result obtained from the corrosion characteristic value is comprehensively evaluated to obtain the target state of the grounding grid.

[0146] Specifically, the grounding grid status assessment results are ranked from normal state (highest level) to fault state (lowest level). Supplementary data is collected every time interval t, for a maximum of n sets of data. The status results can be categorized as follows:

[0147] ① When both criteria (first state evaluation result and second state evaluation result) in the n sets of collected data change to the same state level, the grounding grid is considered to be in the final state.

[0148] ②The resistance remains R or M until the nth set of data. f If the data marked by one party is at a lower level, it is considered that the grounding grid is on the edge of a lower level, and the target state tends to transition to a lower level.

[0149] ③ When the data reaches the nth set, one side of the data recovers from a low-level state to a high-level state, while the other side remains unchanged. It is believed that the grounding grid is on the edge of a higher-level state, and the target state tends to transition to a higher-level state.

[0150] In summary, this method evaluates the condition of the grounding grid from both resistance and corrosion characteristic values, overcoming the shortcomings of traditional grounding resistance inspection which is easily affected by the environment or measurement voltage, and can more accurately and effectively evaluate the condition of the grounding grid.

[0151] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0152] Based on the same inventive concept, this application also provides a grounding grid status detection device for implementing the grounding grid status detection method described above. The solution provided by this device is similar to the implementation described in the above method; therefore, the specific limitations in one or more grounding grid status detection device embodiments provided below can be found in the limitations of the grounding grid status detection method described above, and will not be repeated here.

[0153] In one exemplary embodiment, such as Figure 5 As shown, a grounding grid status detection device is provided, including: a resistance acquisition module 200, a preliminary evaluation module 400, a secondary evaluation module 600, and a final evaluation module 800, wherein:

[0154] The resistance acquisition module 200 is used to acquire the grounding resistance information of the grounding grid.

[0155] The preliminary assessment module 400 is used to detect the first state assessment result of the grounding grid based on the grounding resistance information.

[0156] The secondary evaluation module 600 is used to evaluate the grounding grid for local corrosion and fracture when the first state evaluation result indicates that the grounding grid is in an abnormal state, and obtain the second state evaluation result.

[0157] The final evaluation module 800 is used to detect the target state of the grounding grid based on the first state evaluation result and the second state evaluation result.

[0158] In one embodiment, the abnormal state includes at least a fluctuating state, an abnormal state, and a fault state. The preliminary assessment module 400 is further configured to detect a first state assessment result of the grounding grid indicating that the grounding grid is in a normal state when the grounding resistance information is less than a preset first resistance threshold; detect a first state assessment result of the grounding grid indicating that the grounding grid is in a fluctuating state when the grounding resistance information is greater than a preset first resistance threshold and less than a preset second resistance threshold; detect a first state assessment result of the grounding grid indicating that the grounding grid is in an abnormal state when the grounding resistance information is greater than a preset third resistance threshold; and detect a first state assessment result of the grounding grid indicating that the grounding grid is in a fault state when the grounding resistance information is greater than a preset third resistance threshold.

[0159] In one embodiment, the secondary evaluation module 600 is further configured to inject a different frequency current into the grounding grid; when the different frequency current is extracted from a preset first extraction point and a preset second extraction point of the grounding grid, to obtain first corrosion characteristic information of the preset first extraction point and second corrosion characteristic information of the preset second extraction point; and to detect the second state evaluation result of the grounding grid based on the first corrosion characteristic information and the second corrosion characteristic information.

[0160] In one embodiment, at least one monitoring point is set within a preset spatial range corresponding to the preset first extraction point; the secondary evaluation module 600 is further used to acquire the surface magnetic field strength information of at least one monitoring point, and the standard surface magnetic field strength information of at least one monitoring point under non-corrosive conditions; for each monitoring point, based on the standard surface magnetic field strength information and the surface magnetic field strength information, the surface magnetic field strength change information of the monitoring point is detected; based on the cumulative information of the surface magnetic field strength change information of all monitoring points, the first corrosion characteristic information of the preset first extraction point is detected.

[0161] In one embodiment, the secondary evaluation module 600 is further configured to: detect a second state evaluation result of the grounding grid indicating that the grounding grid is in a normal state when the first corrosion feature information is less than a preset first corrosion feature threshold and the second corrosion feature information is less than a preset second corrosion feature threshold; detect a second state evaluation result of the grounding grid indicating that the grounding grid is in a fluctuating state when the first corrosion feature information is greater than or equal to the preset first corrosion feature threshold and less than a preset third corrosion feature threshold and the second corrosion feature information is greater than or equal to the preset second corrosion feature threshold and less than a preset fourth corrosion feature threshold; detect a second state evaluation result of the grounding grid indicating that the grounding grid is in an abnormal state when the first corrosion feature information is greater than or equal to the preset third corrosion feature threshold and less than a preset fifth corrosion feature threshold and the second corrosion feature information is greater than or equal to the preset fourth corrosion feature threshold and less than a preset sixth corrosion feature threshold; and detect a second state evaluation result of the grounding grid indicating that the grounding grid is in a fault state when the first corrosion feature information is greater than the preset fifth corrosion feature threshold and the second corrosion feature information is greater than the preset sixth corrosion feature threshold.

[0162] In one embodiment, the first state evaluation result and the second state evaluation result include the first state evaluation result and the second state evaluation result corresponding to each of the multiple iterative evaluation processes; the first state evaluation result includes at least a first state evaluation level, and the first state evaluation result includes at least a second state evaluation level; the final evaluation module 800 is further configured to determine the target state of the grounding grid in the target iterative evaluation process as the first state evaluation level when the first state evaluation level corresponding to the target iterative evaluation process is the same as the second state evaluation level corresponding to the target iterative evaluation process in all iterative evaluation processes, and the first state evaluation level is the final grounding grid state; when the first state evaluation level corresponding to each of the iterative evaluation processes is lower than the second state evaluation level corresponding to the same iterative evaluation process, or when the second state evaluation level corresponding to each of the iterative evaluation processes is lower than the first state evaluation level corresponding to the same iterative evaluation process, determine the grounding grid state. The target state of the grounding network is the first transitional state, which is a transitional state that tends to change towards the lower of the first and second state evaluation levels. When the first state evaluation level corresponding to each of the iterative evaluation processes remains unchanged, and the second state evaluation level corresponding to the same iterative evaluation process changes from lower than the first state evaluation level to higher than the first state evaluation level, the target state of the grounding network is determined to be the second transitional state, which is a transitional state that tends to change towards the changed second state evaluation level. When the second state evaluation level corresponding to each of the iterative evaluation processes remains unchanged, and the first state evaluation level corresponding to the same iterative evaluation process changes from lower than the second state evaluation level to higher than the second state evaluation level, the target state of the grounding network is determined to be the third transitional state, which is a transitional state that tends to change towards the changed first state evaluation level.

[0163] Each module in the aforementioned grounding grid status detection device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0164] In one exemplary embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 6As shown, this computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operating system and computer programs stored in the non-volatile storage media. The database stores data such as grounding resistance information of the grounding grid. The I / O interfaces are used for information exchange between the processor and external devices. The communication interface is used for communication with external terminals via a network connection. When executed by the processor, the computer program implements a grounding grid status detection method.

[0165] Those skilled in the art will understand that Figure 6 The structure shown is a block diagram of a partial structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0166] In one embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments.

[0167] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0168] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0169] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0170] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0171] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for detecting a state of a grounding grid, characterized by, The method comprises: acquiring grounding resistance information of a grounding network; detecting a first state evaluation result of the grounding network according to the grounding resistance information; when the first state evaluation result represents that the grounding network is in an abnormal state, performing local corrosion fracture evaluation on the grounding network to obtain a second state evaluation result; detecting a target state of the grounding network according to the first state evaluation result and the second state evaluation result.

2. The method of claim 1, wherein, The abnormal state at least includes a fluctuation state, an abnormal state and a fault state; the first state evaluation result of the grounding network is detected according to the grounding resistance information, comprising: when the grounding resistance information is less than a preset first resistance threshold, it is detected that the first state evaluation result of the grounding network represents that the grounding network is in a normal state; when the grounding resistance information is greater than the preset first resistance threshold and less than a preset second resistance threshold, it is detected that the first state evaluation result of the grounding network represents that the grounding network is in a fluctuation state; when the grounding resistance information is greater than the preset second resistance threshold and less than a preset third resistance threshold, it is detected that the first state evaluation result of the grounding network represents that the grounding network is in an abnormal state; when the grounding resistance information is greater than the preset third resistance threshold, it is detected that the first state evaluation result of the grounding network represents that the grounding network is in a fault state.

3. The method of claim 1, wherein, The second state evaluation result of the grounding network is detected according to the first corrosion feature information and the second corrosion feature information, comprising: injecting an alternating current into the grounding network; under the condition that the alternating current is extracted from a preset first extraction point and a preset second extraction point of the grounding network, acquiring first corrosion feature information of the preset first extraction point and second corrosion feature information of the preset second extraction point; detecting the second state evaluation result of the grounding network according to the first corrosion feature information and the second corrosion feature information.

4. The method of claim 3, wherein, At least one monitoring point is arranged in a preset space range corresponding to the preset first extraction point; the first corrosion feature information of the preset first extraction point is acquired, comprising: acquiring ground magnetic field intensity information of the at least one monitoring point and standard ground magnetic field intensity information of the at least one monitoring point in the case of no corrosion; for each monitoring point, detecting ground magnetic field intensity change information of the monitoring point according to the standard ground magnetic field intensity information and the ground magnetic field intensity information; detecting the first corrosion feature information of the preset first extraction point according to cumulative information of ground magnetic field intensity change information of all monitoring points.

5. The method of claim 3, wherein, The second state evaluation result of the grounding network is detected according to the first corrosion feature information and the second corrosion feature information, comprising: when the first corrosion feature information is less than a preset first corrosion feature threshold, and the second corrosion feature information is less than a preset second corrosion feature threshold, it is detected that the second state evaluation result of the grounding network represents that the grounding network is in a normal state; When the first corrosion feature information is greater than or equal to a preset first corrosion feature threshold and less than a preset third corrosion feature threshold, and the second corrosion feature information is greater than or equal to a preset second corrosion feature threshold and less than a preset fourth corrosion feature threshold, a second state evaluation result of the grounding grid is detected to represent that the grounding grid is in a fluctuation state; When the first corrosion feature information is greater than or equal to a preset third corrosion feature threshold and less than a preset fifth corrosion feature threshold, and the second corrosion feature information is greater than or equal to a preset fourth corrosion feature threshold and less than a preset sixth corrosion feature threshold, a second state evaluation result of the grounding grid is detected to represent that the grounding grid is in an abnormal state; When the first corrosion feature information is greater than a preset fifth corrosion feature threshold, and the second corrosion feature information is greater than a preset sixth corrosion feature threshold, a second state evaluation result of the grounding grid is detected to represent that the grounding grid is in a fault state.

6. The method of claim 1, wherein, The first state evaluation result and the second state evaluation result include the first state evaluation result and the second state evaluation result corresponding to each iteration evaluation process; the first state evaluation result at least includes a first state evaluation grade, and the first state evaluation result at least includes a second state evaluation grade; The target state of the grounding grid is detected according to the first state evaluation result and the second state evaluation result, including: When the first state evaluation grade corresponding to a target iteration evaluation process and the second state evaluation grade corresponding to the target iteration evaluation process are the same in all iteration evaluation processes, it is determined that the target state of the grounding grid in the target iteration evaluation process is the first state evaluation grade, and the first state evaluation grade is the final state of the grounding grid; When the first state evaluation grade corresponding to each iteration evaluation process is lower than the second state evaluation grade corresponding to the same iteration evaluation process, or the second state evaluation grade corresponding to each iteration evaluation process is lower than the first state evaluation grade corresponding to the same iteration evaluation process, it is determined that the target state of the grounding grid is a first transition state, wherein the first transition state is a transition state tending to change to a state evaluation grade with a lower level between the first state evaluation grade and the second state evaluation grade; When the first state evaluation grade corresponding to each iteration evaluation process is unchanged, and the second state evaluation grade corresponding to the same iteration evaluation process changes from being lower than the first state evaluation grade to being higher than the first state evaluation grade, it is determined that the target state of the grounding grid is a second transition state, wherein the second transition state is a transition state tending to change to the changed second state evaluation grade; When all iterative evaluation processes correspond to the second state evaluation level unchanged, and the same iterative evaluation process corresponds to the first state evaluation level changes from lower than the second state evaluation level to higher than the second state evaluation level, the target state of the grounding grid is determined as a third transition state, wherein the third transition state tends to change to the transition state of the changed first state evaluation level.

7. A ground grid state detection device characterized by comprising: The device comprises: an electric resistance obtaining module configured to obtain grounding resistance information of the grounding grid; a preliminary evaluation module configured to detect a first state evaluation result of the grounding grid according to the grounding resistance information; a secondary evaluation module configured to perform local corrosion and fracture evaluation on the grounding grid when the first state evaluation result indicates that the grounding grid is in an abnormal state, and obtain a second state evaluation result; a final evaluation module configured to detect a target state of the grounding grid according to the first state evaluation result and the second state evaluation result.

8. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that, The processor executes the computer program to implement the steps of the method in any one of claims 1 to 6.

9. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the method in any one of claims 1 to 6.

10. A computer program product comprising a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the method in any one of claims 1 to 6.

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