A method, device and equipment for acquiring corrosion detection data of a substation grounding grid

Abstract

The application relates to a substation grounding grid corrosion detection data acquisition method, device and equipment, the method comprising the following steps: acquiring a grounding grid topological structure of a substation and detection state data of a magnetic field detection device, arranging at least two down lead grounding wires on the grounding grid topological structure, and applying an off-frequency alternating current between the two down lead grounding wires; selecting an arbitrary straight line from the grounding grid topological structure as a first test path and a second test path; firstly, detecting according to the detection state data by using the magnetic field detection device along the first test path to obtain a plurality of first magnetic field measurement data; secondly, detecting according to the detection state data by using the magnetic field detection device along the second test path to obtain a plurality of second magnetic field measurement data; and finally, determining the corrosion detection data of the substation grounding grid according to all the first magnetic field measurement data and all the second magnetic field measurement data, improving the accuracy of the detection data and avoiding the omission of the corrosion detection data of the substation grounding grid.

Description

Technical Field

[0001] This application relates to the field of grounding grid corrosion detection technology, and in particular to a method, apparatus and equipment for acquiring corrosion detection data of substation grounding grids. Background Technology

[0002] As a critical infrastructure ensuring the safe operation of power systems, substations, and various important facilities, the grounding grid undertakes the core functions of fault current discharge, potential equalization, and overvoltage protection. Its performance directly affects the stable operation of the power grid and the safety of personnel and equipment. Because grounding conductors are buried in a complex underground environment for extended periods, they are continuously subjected to mechanical damage such as soil electrochemical corrosion, microbial corrosion, stray current erosion, and construction disturbances. This makes them highly susceptible to hidden defects such as conductor cross-section reduction, loosening of connection points, branch breakage, and even overall topological destruction. Once a grounding failure occurs, lightning current or short-circuit fault current cannot be effectively conducted, leading to catastrophic consequences such as abnormal ground potential rise, insulation breakdown of secondary equipment, and energization of metal structures. In severe cases, this can cause system shutdowns, equipment damage, and personal injury accidents.

[0003] Traditional grounding grid corrosion detection mainly relies on periodic excavation and spot checks, which is inefficient and destructive. The detection path is often determined by the testers based on their experience. To address the problem of missed detections due to the inability to determine the detection path in traditional grounding grid corrosion detection methods, a grounding grid topology detection based on the magnetic field method has been proposed. As described in "Wang Wendong. Research on Electromagnetic Detection Method and Device for Combined Pulse Source of Grounding Grid Structure [D]. Chongqing: Chongqing University, 2021," the method uses UWB (Ultra-Wideband) positioning technology to measure the location of the measurement point. However, the UWB positioning principle requires a minimum functional unit of four positioning base stations, and the coordinates of these base stations must be determined beforehand, making on-site operation complex. Furthermore, UWB technology has the following problems: firstly, severe signal attenuation limits the positioning range, making it impossible to measure or requiring more base stations when the substation area is large; secondly, ground equipment within the substation obstructs the propagation of the UWB signal, creating blind spots and missed detections, resulting in inaccurate detection data for substation grounding grid corrosion. Summary of the Invention

[0004] This application provides a method, apparatus, and equipment for acquiring corrosion detection data of substation grounding grids, which solves the technical problems of existing corrosion detection paths for substation grounding grids being set based on the experience of inspection personnel, resulting in missed detections and inaccurate detection data.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] On the one hand, a method for acquiring corrosion detection data of substation grounding grids is provided, including the following steps:

[0007] Obtain the grounding grid topology and magnetic field detection status data of the substation, set at least two down-leading grounding wires on the grounding grid topology, and apply a different frequency AC current between the two down-leading grounding wires;

[0008] From the grounding grid topology, select any straight line as the first test path and select a path with a different test direction from the first test path as the second test path;

[0009] First, based on the detection status data, the magnetic field detection device is used to perform detection along the first test path to obtain several first magnetic field measurement data; then, based on the detection status data, the magnetic field detection device is used to perform detection along the second test path to obtain several second magnetic field measurement data.

[0010] Based on all the first magnetic field measurement data and all the second magnetic field measurement data, the corrosion detection data of the substation grounding grid is determined.

[0011] Optionally, based on the detection status data, the magnetic field detection device is used to perform detection along the first test path to obtain several first magnetic field measurement data, including:

[0012] Based on the detection status data, the magnetic field detection device is used to perform detection along the first test path to obtain a first detection curve composed of several magnetic field data over time. Based on the maximum value point of the first detection curve, each first measurement position is determined.

[0013] Using each first measurement position as a first measurement starting point, a first test direction corresponding to each first measurement starting point is determined based on each first measurement starting point and the first test path; and a first detection path corresponding to each first measurement starting point is determined based on each first measurement starting point and the corresponding first test direction.

[0014] Using the time of the first measurement position as the order, the magnetic field detection device is used to perform detection along each of the first detection paths based on the detection status data, thereby obtaining a number of first magnetic field measurement data corresponding to each of the first detection paths.

[0015] Optionally, the first test direction is a direction perpendicular to the first test path and pointing towards the center of the substation.

[0016] Optionally, based on the detection status data, the magnetic field detection device is used to perform detection according to the second test path to obtain several second magnetic field measurement data, including:

[0017] Based on the detection status data, a magnetic field detection device is used to perform detection according to the second test path to obtain a second detection curve composed of several magnetic field data over time. Based on the maximum value point of the second detection curve, each second measurement position is determined.

[0018] Using each second measurement position as a second measurement starting point, a second test direction is determined based on each second measurement starting point and the second test path; a second detection path corresponding to each second measurement starting point is determined based on each second measurement starting point and the corresponding second test direction.

[0019] Using the time of the second measurement position as the order, the magnetic field detection device is used to perform detection according to each of the second detection paths based on the detection status data, thereby obtaining the second magnetic field measurement data corresponding to each of the second detection paths.

[0020] Optionally, the second test direction is a direction perpendicular to the second test path and pointing towards the center of the substation.

[0021] Optionally, the detection status data includes the height and attitude data of the magnetic field detection device; and / or, the magnetic field detection device includes a detachable bracket and a back bracket movably connected to the detachable bracket, the top of the detachable bracket is provided with a positioning module, and the bottom of the detachable bracket is provided with a magnetic field detection element and a multi-axis attitude detection element.

[0022] On the other hand, a corrosion detection data acquisition device for substation grounding grid is provided, including a reference setting module, a test path determination module, a detection module and a data determination module;

[0023] The reference setting module is used to acquire the grounding grid topology and detection status data of the magnetic field detection equipment of the substation, set at least two down-leading grounding wires on the grounding grid topology, and apply a different frequency AC current between the two down-leading grounding wires;

[0024] The test path determination module is used to select any straight line from the grounding grid topology as the first test path and select a path with a test direction different from the first test path as the second test path.

[0025] The detection module is used to first perform detection using the magnetic field detection device along the first test path based on the detection status data to obtain several first magnetic field measurement data; and then perform detection using the magnetic field detection device along the second test path based on the detection status data to obtain several second magnetic field measurement data.

[0026] The data determination module is used to determine the corrosion detection data of the substation grounding grid based on all the first magnetic field measurement data and all the second magnetic field measurement data.

[0027] Optionally, the detection module includes a first data detection submodule and a second data detection submodule;

[0028] The first data detection submodule is configured to perform detection using the magnetic field detection device along the first test path based on the detection status data, thereby obtaining a first detection curve composed of several magnetic field data points over time; determine each first measurement position based on the maximum value point of the first detection curve; use each first measurement position as a first measurement starting point, and determine a first test direction corresponding to each first measurement starting point based on each first measurement starting point and the first test path; determine a first detection path corresponding to each first measurement starting point based on each first measurement starting point and the corresponding first test direction; and, using the time sequence of the first measurement positions, perform detection using the magnetic field detection device along each first detection path based on the detection status data, thereby obtaining several first magnetic field measurement data points corresponding to each first detection path.

[0029] The second data detection submodule is used to perform detection using a magnetic field detection device along the second test path based on the detection status data, to obtain a second detection curve composed of several magnetic field data over time; to determine each second measurement position based on the maximum value point of the second detection curve; to determine a second test direction based on each second measurement position as a second measurement starting point and the second test path; to determine a second detection path corresponding to each second measurement starting point based on each second measurement starting point and the corresponding second test direction; and to perform detection using the magnetic field detection device along each second detection path according to the detection status data, based on the time sequence of the second measurement positions, to obtain second magnetic field measurement data corresponding to each second detection path.

[0030] Optionally, the first test direction is perpendicular to the first test path and points towards the center of the substation; and / or, the second test direction is perpendicular to the second test path and points towards the center of the substation.

[0031] On the other hand, a terminal device is provided, including a processor and a memory;

[0032] The memory is used to store program code and transmit the program code to the processor;

[0033] The processor is used to execute the above-described method for acquiring corrosion detection data of the substation grounding grid according to the instructions in the program code.

[0034] This invention discloses a method, apparatus, and equipment for acquiring corrosion detection data of a substation grounding grid. The method includes acquiring the substation grounding grid topology and the detection status data of a magnetic field detection device. At least two down-leading grounding wires are installed on the grounding grid topology, and a different frequency AC current is applied between the two down-leading grounding wires. An arbitrary straight line is selected from the grounding grid topology as a first test path, and a path with a different test direction from the first test path is selected as a second test path. First, based on the detection status data, the magnetic field detection device is used to perform detection along the first test path, obtaining several first magnetic field measurement data points. Then, based on the detection status data, the magnetic field detection device is used to perform detection along the second test path, obtaining several second magnetic field measurement data points. Based on all the first and second magnetic field measurement data points, the corrosion detection data of the substation grounding grid is determined.

[0035] As can be seen from the above technical solutions, this application has the following advantages: the method for obtaining corrosion detection data of substation grounding grid is to select a first test path and a second test path, and then obtain several first magnetic field measurement data and several second magnetic field measurement data according to the first test path and the second test path respectively to form corrosion detection data of substation grounding grid, thereby improving the accuracy of detection data and avoiding missed detection of corrosion detection data of substation grounding grid.

[0036] The corrosion detection data acquisition device for the substation grounding grid uses a reference setting module, a test path determination module, a detection module, and a data determination module to determine a first test path and a second test path. Then, it acquires several first magnetic field measurement data and several second magnetic field measurement data according to the first test path and the second test path, respectively, to form the corrosion detection data of the substation grounding grid. This improves the accuracy of the detection data and avoids missed detections of corrosion detection data of the substation grounding grid. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a flowchart illustrating the steps of the method for acquiring corrosion detection data of a substation grounding grid as described in an embodiment of this application.

[0039] Figure 2This is a schematic diagram of the grounding grid topology and test path in the method for acquiring corrosion detection data of substation grounding grids according to an embodiment of this application;

[0040] Figure 3 This is a schematic diagram of the grounding grid topology for the corrosion detection data acquisition method of the substation grounding grid described in the embodiments of this application;

[0041] Figure 4 This is a corrosion thermogram of the corrosion detection data in the method for acquiring corrosion detection data of substation grounding grid described in the embodiments of this application;

[0042] Figure 5 This is a first detection curve diagram of the corrosion detection data acquisition method for substation grounding grids described in the embodiments of this application;

[0043] Figure 6 This is a second detection curve diagram of the corrosion detection data acquisition method for substation grounding grids described in the embodiments of this application;

[0044] Figure 7 This is a schematic diagram of the frame of the corrosion detection data acquisition device for the substation grounding grid described in the embodiments of this application;

[0045] Figure 8 This is a schematic diagram of the terminal device described in an embodiment of this application. Detailed Implementation

[0046] To make the inventive objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] In the description of the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0048] In the embodiments of this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0049] This application provides a method, apparatus, and equipment for acquiring corrosion detection data of substation grounding grids, which solves the technical problems of existing corrosion detection paths for substation grounding grids being set based on the experience of inspection personnel, resulting in missed detections and inaccurate detection data.

[0050] Example 1:

[0051] Figure 1 This is a flowchart illustrating the steps of the method for acquiring corrosion detection data of a substation grounding grid as described in an embodiment of this application. Figure 2 This is a schematic diagram of the grounding grid topology and test path in the method for acquiring corrosion detection data of substation grounding grids according to an embodiment of this application. Figure 3 This is a schematic diagram of the grounding grid topology for the corrosion detection data acquisition method of the substation grounding grid described in the embodiments of this application.

[0052] like Figures 1 to 3 As shown in the figure, this application embodiment provides a method for acquiring corrosion detection data of substation grounding grid, including the following steps:

[0053] S1. Obtain the grounding grid topology and magnetic field detection status data of the substation, set at least two down-leading grounding wires on the grounding grid topology, and apply a different frequency AC current between the two down-leading grounding wires.

[0054] It should be noted that the detection status data includes the height and attitude data of the magnetic field detection equipment. The magnetic field detection equipment includes a detachable bracket and a backpack bracket movably connected to the detachable bracket. A positioning module is provided at the top of the detachable bracket, and a magnetic field detection element and a multi-axis attitude detection element are provided at the bottom of the detachable bracket. The attitude data can be the pitch angle and roll angle of the attitude detection element, etc. The magnetic field detection element can be selected as a ground magnetic field detection sensor, and the attitude detection element can be selected as a six-axis attitude sensor. The positioning module can be selected as an RTK antenna. In this embodiment, in the process of acquiring corrosion detection data of the substation grounding grid, step S1 is to establish a benchmark for acquiring corrosion detection data of the substation grounding grid. For example, injecting a different frequency AC current into the outermost grounding wire of the substation grounding grid, the injected different frequency AC current can generate a magnetic field above the substation ground surface, providing a benchmark for the inspection personnel to carry the portable magnetic field detection equipment to walk and inspect above the grounding grid surface, and to acquire detection data at various locations above the grounding grid surface.

[0055] In other embodiments, the magnetic field detection device may be a high-precision magnetic field detector (such as the Gaussmeter 8000 series) equipped with a three-dimensional Hall probe.

[0056] In this embodiment of the application, step S1 can be understood as: selecting any two outermost grounding wires in the grounding grid topology as a group of power supply application points, such as... Figure 3 As shown, a different frequency AC current is connected between the two outermost grounding wires selected to generate a magnetic field above the substation ground surface, providing a signal for acquiring detection data.

[0057] In this embodiment, during the process of obtaining the substation grounding grid topology, design drawings, as-built documents, and other materials of the substation can be consulted to obtain information on the grounding grid topology, including the arrangement of grounding electrodes and the connection method of grounding wires. Alternatively, the grounding grid topology can be obtained through on-site measurement and detection, such as using grounding resistance testers and earth grid testers to perform on-site measurements and detection at the substation. Then, by injecting test current into the grounding grid and measuring the resistance values ​​between different points, a more accurate grounding grid topology can be drawn by combining relevant algorithms and models.

[0058] In this embodiment, before using the magnetic field detection equipment, a self-test is performed to check the functionality of the equipment, such as sensor sensitivity and the stability of the data acquisition system, during the acquisition of detection status data. The equipment is then installed in a suitable location and debugged according to the detection status data. This ensures the equipment can accurately detect changes in the magnetic field around the grounding grid and connects correctly to the data acquisition system for real-time data transmission and recording. Before formally detecting corrosion data in the substation grounding grid, initial data from the magnetic field detection equipment is recorded, including its operating parameters and detection accuracy, for subsequent comparison and analysis.

[0059] In this embodiment of the application, according to the grounding grid topology and testing requirements, at least two down-grounding wires are set on the grounding grid topology. The positions of the down-grounding wires should be distributed as evenly as possible to cover the grounding grid area to be tested. Avoid setting down-grounding wires in weak links of the grounding grid or in locations with potential faults, so as not to affect the accuracy of the test results.

[0060] It should be noted that appropriate tools and materials should be used when installing the down-lead grounding wire on the grounding grid to ensure a reliable connection between the down-lead grounding wire and the grounding grid. The connection point between the grounding grid and the down-lead grounding wire should be treated with anti-corrosion measures to ensure a firm connection and good conductivity. The length and specifications of the down-lead grounding wire should be selected according to the actual situation to ensure that it can meet the requirements of applying alternating current at different frequencies.

[0061] In this embodiment, applying a different frequency AC current between the two down-grounding wires can correctly connect devices such as the different frequency signal generator and power amplifier to the down-grounding wires, ensuring that the different frequency AC current can be smoothly applied to the grounding grid.

[0062] It should be noted that when applying alternating current at different frequencies, the equipment should be debugged and appropriate parameters such as current frequency and amplitude should be set. The current frequency should be selected to be different from the power frequency to avoid power frequency interference; the current amplitude should be reasonably selected according to the scale of the grounding grid and the testing requirements.

[0063] S2. Select any straight line from the grounding grid topology as the first test path and select a path with a different test direction from the first test path as the second test path.

[0064] It should be noted that step S2 determines the first and second test paths based on the grounding grid topology obtained in step S1, providing a basic test path for accurately obtaining corrosion detection data of the substation grounding grid. In this embodiment, as... Figure 2As shown, the method for obtaining corrosion detection data of the substation grounding grid involves step S2, whereby an arbitrary straight line is selected from the grounding grid topology as the first test path, and then a straight line path with a different test direction from the first test path is selected as the second test path.

[0065] For example, step S2 can be understood as selecting the longest straight line in the grounding grid topology as the first test path, and similarly, selecting the longest straight line path with a different test direction from the first test path as the second test path.

[0066] S3. First, based on the detection status data, use a magnetic field detection device to perform detection along the first test path to obtain several first magnetic field measurement data; then, based on the detection status data, use a magnetic field detection device to perform detection along the second test path to obtain several second magnetic field measurement data.

[0067] It should be noted that, firstly, based on the detection status data, a magnetic field detection device is used to conduct detection along the first test path, thereby obtaining several first magnetic field measurement data. Subsequently, based on the detection status data again, the same magnetic field detection device is used to conduct detection along the second test path, ultimately obtaining several second magnetic field measurement data, which provide data for subsequent acquisition of corrosion detection data for the substation grounding grid. In this embodiment, step S3 can be understood as follows: In the process of acquiring corrosion detection data for the substation grounding grid, the first step is to fully refer to the detection status data, reasonably arrange the magnetic field detection device, and conduct detection operations according to the pre-selected first test path. The magnetic field detection device collects relevant data in real time, and after the detection is completed, several first magnetic field measurement data can be obtained. After completing the detection of the first test path, the second step proceeds. Again, based on the detection status data, the same magnetic field detection device is used to conduct detection along a second test path with a different test direction than the first test path. During the detection of the second test path, the magnetic field detection device collects relevant data in real time, thus obtaining several second magnetic field measurement data.

[0068] For example, in the process of obtaining corrosion detection data of substation grounding grid, the inspector holds a magnetic field detection device and moves the probe at a constant speed (e.g., 0.5 m / s) along the first test path. The magnetic field detection device automatically collects each magnetic field component and the total field strength as magnetic field data. The detection process of the first test path is repeated, and the magnetic field detection device is moved along the second test path to collect several second magnetic field measurement data.

[0069] In this embodiment of the application, before performing step S3, the method for acquiring corrosion detection data of the substation grounding grid further includes: installing a power supply for the magnetic field detection equipment, verifying the status of the magnetic field detection equipment, initializing the self-test, and establishing a benchmark for subsequent detection.

[0070] It should be noted that the testing personnel insert the lithium battery of the level into the magnetic field testing equipment and check the status of the equipment. If the status is normal, the testing begins. The testing personnel hold the magnetic field testing equipment and then turn on its power switch, initiating a self-test. The initial calibration measures the position and orientation of the magnetic field testing equipment to establish a benchmark, providing a foundation for obtaining accurate testing data later.

[0071] Figure 4 This is a corrosion thermogram of the corrosion detection data in the substation grounding grid corrosion detection data acquisition method described in this application embodiment. Specifically, Figure 4 This is a pseudo-color corrosion thermogram using the magnetic field strength as corrosion detection data.

[0072] S4. Based on all the first magnetic field measurement data and all the second magnetic field measurement data, determine the corrosion detection data of the substation grounding grid.

[0073] It should be noted that step S4, after detecting the grounding grid topology in step S3, obtains all the first magnetic field measurement data and all the second magnetic field measurement data, which constitute the corrosion detection data of the substation grounding grid. The corrosion detection data is used to draw a diagram of the actual condition of the grounding grid conductor of the entire substation (such as a corrosion heat map) as the corrosion detection result, which is convenient for the inspection personnel to view.

[0074] For example, step S4 can save several first magnetic field measurement data and several second magnetic field measurement data into a structured file and generate a visualization report, which meets the accuracy and traceability requirements of substation grounding grid corrosion detection, and also provides data for the location and determination of grounding grid corrosion.

[0075] In this embodiment of the application, the method for obtaining corrosion detection data of the substation grounding grid obtains corrosion detection data of the substation grounding grid by acquiring several first magnetic field measurement data and several second magnetic field measurement data according to the first test path and the second test path in sequence, thereby avoiding missed detection of corrosion detection data of the substation grounding grid.

[0076] This application provides a method for acquiring corrosion detection data of a substation grounding grid, comprising acquiring the substation grounding grid topology and detection status data of a magnetic field detection device; setting at least two down-leading grounding wires on the grounding grid topology and applying a different frequency AC current between the two down-leading grounding wires; selecting any straight line from the grounding grid topology as a first test path and selecting a path with a different test direction from the first test path as a second test path; firstly, using the magnetic field detection device to perform detection along the first test path based on the detection status data, obtaining several first magnetic field measurement data; then, using the magnetic field detection device to perform detection along the second test path based on the detection status data, obtaining several second magnetic field measurement data; and determining the corrosion detection data of the substation grounding grid based on all the first magnetic field measurement data and all the second magnetic field measurement data. The new method for acquiring corrosion detection data of substation grounding grids involves selecting a first test path and a second test path, and then sequentially acquiring several first magnetic field measurement data and several second magnetic field measurement data according to the first test path and the second test path, respectively, to form the corrosion detection data of the substation grounding grid. This method improves the accuracy of the detection data and avoids missed detections of corrosion detection data of substation grounding grids. It also solves the technical problem that the existing corrosion detection path of substation grounding grids is set based on the experience of the testing personnel, which leads to missed detections and inaccurate detection data.

[0077] It should be noted that the method for acquiring corrosion detection data of the substation grounding grid does not rely on the operator's experience by determining the test path and detection path. This can effectively avoid the problem of missed detection in the detection process of large substations and fill the gap in the path planning of electromagnetic field detection and imaging technology in substations, such as how to move and where to measure.

[0078] Figure 5 This is a first detection curve diagram of the corrosion detection data acquisition method for the substation grounding grid described in this application embodiment. Specifically, Figure 5 The curves shown represent the changes in the magnetic field.

[0079] In one embodiment of this application, a magnetic field detection device is used to perform detection according to a first test path based on the detection status data, and several first magnetic field measurement data are obtained, including:

[0080] Based on the detection status data, a magnetic field detection device is used to perform detection along the first test path to obtain a first detection curve composed of several magnetic field data over time. Based on the maximum value point of the first detection curve, each first measurement position is determined.

[0081] Each first measurement position is taken as the first measurement starting point. Based on each first measurement starting point and the first test path, the first test direction corresponding to each first measurement starting point is determined. Based on each first measurement starting point and the corresponding first test direction, the first detection path corresponding to each first measurement starting point is determined.

[0082] Based on the time sequence of the first measurement position, the magnetic field detection equipment is used to perform detection along each first detection path according to the detection status data, thereby obtaining several first magnetic field measurement data corresponding to each first detection path;

[0083] The first test direction is perpendicular to the first test path and points towards the center of the substation.

[0084] It should be noted that the magnetic field detection equipment is moved at a constant speed along the preset first test path (such as the main line of the grounding grid), and the three-dimensional magnetic field components and total field strength at each time point are collected synchronously as magnetic field data to generate the first detection curve (time-magnetic field strength curve), such as... Figure 5 As shown, the horizontal axis represents time, and the vertical axis represents the total field strength of the magnetic field data, reflecting the magnetic field fluctuation characteristics along the path. Mathematical processing (such as finding extrema using the first derivative) is performed on the first detection curve to identify maximum points (such as locations of magnetic field abrupt changes) and determine each first measurement position (such as the coordinate points corresponding to the peak values ​​in the curve). Each maximum point is used as the corresponding first measurement position. Then, taking each first measurement position as the starting point, a first test direction is defined as the direction perpendicular to the first test path and pointing towards the center of the substation (for example, if the first test path is the X-axis direction, then the first test direction is the -Y direction). Extending from each first measurement starting point along the first test direction forms the corresponding first detection path (such as a line segment extending perpendicularly from point A on the main line to the center of the substation). Each first detection path is repeatedly tested sequentially in chronological order, collecting magnetic field data along each first detection path, thus obtaining several first magnetic field measurement data points collected for all first detection paths (such as 5 data points for first detection path 1, 3 data points for first detection path 2, etc.), forming multiple sets of vertical magnetic field distribution datasets.

[0085] In this embodiment, during the acquisition of several first magnetic field measurement data, the testing personnel walk and measure along the selected first test path. While walking, the carrying frame sways with the body, and the multi-axis attitude detection element and positioning module detect the detection attitude and height of the magnetic field detection device in real time. The magnetic field detection device automatically adjusts itself to maintain its detection state data within the inertial space, i.e., a preset attitude (0° pitch, 0° roll) and height (30 cm). The first test path detection includes: the testing personnel walking on the first test path with the magnetic field detection device; while maintaining the preset attitude and height, the magnetic field detection device automatically collects all magnetic field data along the first test path; and based on all the magnetic field data, a first detection curve of the measured magnetic field data along the first test path is plotted, such as... Figure 5 As shown, it automatically marks the locations of all magnetic field data maxima detected along the first test path, such as... Figure 2 As shown. The first maximum value location marked above is selected as a first measurement starting point. The direction perpendicular to the first test path is taken as the test direction. A first detection path is determined based on the selected first measurement starting point and measurement direction. The first detection path is measured according to the content detected by the first test path until the first detection path is completed. The location of another maximum point on the first test path is selected as another first measurement starting point. The direction perpendicular to the first test path is taken as the test direction. A new first detection path is determined based on the selected first measurement starting point and measurement direction. The new first detection path is measured according to the content detected by the first test path until the first detection path is completed. The above first detection steps are repeated until the detection of all test paths determined by different maximum points on the first test path is completed, obtaining several first magnetic field measurement data.

[0086] Figure 6 This is a second detection curve diagram of the corrosion detection data acquisition method for the substation grounding grid described in the embodiments of this application. Specifically, Figure 6 The curves shown represent the changes in the magnetic field.

[0087] In one embodiment of this application, a magnetic field detection device is used to perform detection according to a second test path based on the detection status data, resulting in several second magnetic field measurement data, including:

[0088] Based on the detection status data, a magnetic field detection device is used to perform detection according to the second test path, and a second detection curve is obtained by combining several magnetic field data over time. Based on the maximum value point of the second detection curve, each second measurement position is determined.

[0089] Using each second measurement position as the second measurement starting point, a second test direction is determined based on each second measurement starting point and the second test path; and a second detection path corresponding to each second measurement starting point is determined based on each second measurement starting point and the corresponding second test direction.

[0090] Based on the time sequence of the second measurement position, the magnetic field detection device is used to perform detection along each second detection path according to the detection status data, thereby obtaining the second magnetic field measurement data corresponding to each second detection path;

[0091] The second test direction is perpendicular to the second test path and points towards the center of the substation.

[0092] It should be noted that the magnetic field detection equipment is moved at a constant speed along the preset second test path (such as the main line of the grounding grid), and the three-dimensional magnetic field components and total field strength at each time point are collected synchronously as magnetic field data to generate a second detection curve (time-magnetic field strength curve), such as... Figure 6As shown, the horizontal axis represents time, and the vertical axis represents the total field strength of the magnetic field data, reflecting the magnetic field fluctuation characteristics along the path. Mathematical processing (such as finding extrema using the first derivative) is performed on the second detection curve to identify maximum points (such as locations of magnetic field abrupt changes) and determine each second measurement location (such as the coordinate points corresponding to the peak values ​​in the curve). Each maximum point is used as the corresponding second measurement location. Then, taking each second measurement location as the starting point, the second test direction is defined as a direction perpendicular to the second test path and pointing towards the center of the substation (for example, if the second test path is the X-axis direction, then the second test direction is the -Y direction). Extending along the second test direction from each second measurement starting point forms the corresponding second detection path (such as a line segment extending perpendicularly from point A on the main line to the center of the substation). Each second detection path is repeatedly tested sequentially in chronological order, collecting magnetic field data along each second detection path, thus obtaining several sets of second magnetic field measurement data collected for all second detection paths (such as 5 data points for second detection path 1, 3 data points for second detection path 2, etc.), forming multiple sets of vertical magnetic field distribution datasets.

[0093] In this embodiment of the application, during the process of obtaining several second magnetic field measurement data, the testing personnel select a path with a different test direction from the first test path as the second test path, such as... Figure 2 As shown. The data detection for the second test path is performed according to the content detected by the first test path, until the second test path is completed. The first maximum value position marked on the second detection curve obtained during the second test path operation is selected as a second measurement starting point. The direction perpendicular to the second test path is taken as the test direction. A second detection path is determined based on the selected measurement starting point and measurement direction. The second detection path is measured according to the content detected by the first test path until the second detection path is completed. The location of another maximum point on the second test path is selected as another second measurement starting point. The direction perpendicular to the second test path is taken as the test direction. A new second detection path is determined based on the selected second measurement starting point and test direction. The new second detection path is measured according to the content detected by the first test path until the new second detection path is completed. The detection content of the first test path is repeated until all second detection paths determined by all different maximum points on the second test path are completed, obtaining several second magnetic field measurement data.

[0094] Example 2:

[0095] Figure 7 This is a schematic diagram of the frame of the corrosion detection data acquisition device for the substation grounding grid described in the embodiments of this application.

[0096] like Figure 7As shown, this application embodiment provides a corrosion detection data acquisition device for substation grounding grid, including a reference setting module 10, a test path determination module 20, a detection module 30 and a data determination module 40;

[0097] The reference setting module 10 is used to acquire the grounding grid topology and detection status data of the magnetic field detection equipment of the substation, set at least two down-leading grounding wires on the grounding grid topology, and apply a different frequency AC current between the two down-leading grounding wires;

[0098] The test path determination module 20 is used to select any straight line from the grounding grid topology as the first test path and select a path with a different test direction from the first test path as the second test path.

[0099] The detection module 30 is used to first perform detection using a magnetic field detection device along a first test path based on the detection status data, and obtain several first magnetic field measurement data; then, based on the detection status data, it uses a magnetic field detection device along a second test path to obtain several second magnetic field measurement data.

[0100] The data determination module 40 is used to determine the corrosion detection data of the substation grounding grid based on all the first magnetic field measurement data and all the second magnetic field measurement data.

[0101] It should be noted that the modules in the device of Embodiment 2 correspond to the steps described in the method of Embodiment 1. Therefore, the contents of the reference setting module 10, test path determination module 20, detection module 30, and data determination module 40 in the substation grounding grid corrosion detection data acquisition device will not be described again in this embodiment. This substation grounding grid corrosion detection data acquisition device uses the first and second test paths determined by the reference setting module 10, test path determination module 20, detection module 30, and data determination module 40 to sequentially acquire several first magnetic field measurement data and several second magnetic field measurement data according to the first and second test paths, thus constructing the corrosion detection data of the substation grounding grid. This improves the accuracy of the detection data and avoids missed detections of corrosion detection data in the substation grounding grid. This substation grounding grid corrosion detection data acquisition device completely eliminates the manual collection, recording, and offline data processing process. Through this method of acquiring corrosion detection data of the substation grounding grid, detection efficiency can be significantly improved, and full-coverage detection of the substation grounding grid can be efficiently achieved.

[0102] In one embodiment of this application, the detection module 30 includes a first data detection submodule and a second data detection submodule;

[0103] The first data detection submodule is used to perform detection using a magnetic field detection device along a first test path based on the detection status data, obtaining a first detection curve composed of several magnetic field data points over time; determining each first measurement position based on the maximum value point of the first detection curve; using each first measurement position as a first measurement starting point, determining a first test direction corresponding to each first measurement starting point based on each first measurement starting point and the first test path; determining a first detection path corresponding to each first measurement starting point based on each first measurement starting point and the corresponding first test direction; and using the magnetic field detection device along each first detection path in time order of the first measurement positions, obtaining several first magnetic field measurement data points corresponding to each first detection path.

[0104] The second data detection submodule is used to perform detection using a magnetic field detection device along a second test path based on the detection status data, obtaining a second detection curve composed of several magnetic field data points over time. Based on the maximum value points of the second detection curve, each second measurement position is determined. Each second measurement position is used as a second measurement starting point, and a second test direction is determined based on each second measurement starting point and the second test path. A second detection path corresponding to each second measurement starting point is determined based on each second measurement starting point and the corresponding second test direction. Using the time sequence of the second measurement positions, the magnetic field detection device performs detection along each second detection path based on the detection status data, obtaining second magnetic field measurement data corresponding to each second detection path.

[0105] It should be noted that the first test direction is perpendicular to the first test path and points towards the center of the substation; and / or, the second test direction is perpendicular to the second test path and points towards the center of the substation.

[0106] Example 3:

[0107] Figure 8 This is a schematic diagram of the terminal device described in an embodiment of this application.

[0108] like Figure 8 As shown, this application provides a terminal device, including a processor and a memory;

[0109] Memory is used to store program code and transfer the program code to the processor;

[0110] The processor is used to execute the above-described method for acquiring corrosion detection data of the substation grounding grid according to the instructions in the program code.

[0111] It should be noted that the processor is used to execute the steps in the above embodiment of a method for acquiring corrosion detection data of a substation grounding grid according to the instructions in the program code. Alternatively, when the processor executes the computer program, it implements the functions of each module / unit in the above system / device embodiments.

[0112] For example, a computer program can be divided into one or more modules / units, one or more of which are stored in memory and executed by a processor to complete this application. One or more modules / units can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program in a terminal device.

[0113] Terminal devices can be computing devices such as desktop computers, laptops, handheld computers, and cloud servers. Terminal devices may include, but are not limited to, processors and memory. Those skilled in the art will understand that this does not constitute a limitation on the terminal device, which may include more or fewer components than illustrated, or combinations of certain components, or different components. For example, a terminal device may also include input / output devices, network access devices, buses, etc.

[0114] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0115] Memory can be an internal storage unit of a terminal device, such as a hard drive or RAM. Memory can also be an external storage device, such as a plug-in hard drive, SmartMedia Card (SMC), Secure Digital (SD) card, or Flash Card. Furthermore, memory can include both internal and external storage units. Memory is used to store computer programs and other programs and data required by the terminal device. Memory can also be used to temporarily store data that has been output or will be output.

[0116] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0117] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, 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 an indirect coupling or communication connection between apparatuses or units through some interfaces, and 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 the present invention 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.

[0120] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0121] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for acquiring corrosion detection data of a substation grounding grid, characterized in that, Includes the following steps: Obtain the grounding grid topology and magnetic field detection status data of the substation, set at least two down-leading grounding wires on the grounding grid topology, and apply a different frequency AC current between the two down-leading grounding wires; From the grounding grid topology, select any straight line as the first test path and select a path with a different test direction from the first test path as the second test path; First, based on the detection status data, the magnetic field detection device is used to perform detection along the first test path to obtain several first magnetic field measurement data; then, based on the detection status data, the magnetic field detection device is used to perform detection along the second test path to obtain several second magnetic field measurement data. Based on all the first magnetic field measurement data and all the second magnetic field measurement data, the corrosion detection data of the substation grounding grid is determined.

2. The method for acquiring corrosion detection data of substation grounding grid according to claim 1, characterized in that, Based on the detection status data, the magnetic field detection device is used to perform detection along the first test path to obtain several first magnetic field measurement data, including: Based on the detection status data, the magnetic field detection device is used to perform detection along the first test path to obtain a first detection curve composed of several magnetic field data over time. Based on the maximum value point of the first detection curve, each first measurement position is determined. Using each first measurement position as a first measurement starting point, a first test direction corresponding to each first measurement starting point is determined based on each first measurement starting point and the first test path; and a first detection path corresponding to each first measurement starting point is determined based on each first measurement starting point and the corresponding first test direction. Using the time of the first measurement position as the order, the magnetic field detection device is used to perform detection along each of the first detection paths based on the detection status data, thereby obtaining a number of first magnetic field measurement data corresponding to each of the first detection paths.

3. The method for acquiring corrosion detection data of substation grounding grid according to claim 2, characterized in that, The first test direction is perpendicular to the first test path and points towards the center of the substation.

4. The method for acquiring corrosion detection data of substation grounding grid according to claim 1, characterized in that, Based on the detection status data, the magnetic field detection device is used to perform detection according to the second test path to obtain several second magnetic field measurement data, including: Based on the detection status data, a magnetic field detection device is used to perform detection according to the second test path to obtain a second detection curve composed of several magnetic field data over time. Based on the maximum value point of the second detection curve, each second measurement position is determined. Using each second measurement position as a second measurement starting point, a second test direction is determined based on each second measurement starting point and the second test path; a second detection path corresponding to each second measurement starting point is determined based on each second measurement starting point and the corresponding second test direction. Using the time of the second measurement position as the order, the magnetic field detection device is used to perform detection according to each of the second detection paths based on the detection status data, thereby obtaining the second magnetic field measurement data corresponding to each of the second detection paths.

5. The method for acquiring corrosion detection data of substation grounding grid according to claim 4, characterized in that, The second test direction is perpendicular to the second test path and points towards the center of the substation.

6. The method for acquiring corrosion detection data of substation grounding grid according to any one of claims 1-5, characterized in that, The detection status data includes the height and attitude data of the magnetic field detection device; and / or, the magnetic field detection device includes a detachable bracket and a back bracket movably connected to the detachable bracket, the top of the detachable bracket is provided with a positioning module, and the bottom of the detachable bracket is provided with a magnetic field detection element and a multi-axis attitude detection element.

7. A device for acquiring corrosion detection data of a substation grounding grid, characterized in that, It includes a benchmark setting module, a test path determination module, a detection module, and a data determination module; The reference setting module is used to acquire the grounding grid topology and detection status data of the magnetic field detection equipment of the substation, set at least two down-leading grounding wires on the grounding grid topology, and apply a different frequency AC current between the two down-leading grounding wires; The test path determination module is used to select any straight line from the grounding grid topology as the first test path and select a path with a test direction different from the first test path as the second test path. The detection module is used to first perform detection using the magnetic field detection device along the first test path based on the detection status data to obtain several first magnetic field measurement data; and then perform detection using the magnetic field detection device along the second test path based on the detection status data to obtain several second magnetic field measurement data. The data determination module is used to determine the corrosion detection data of the substation grounding grid based on all the first magnetic field measurement data and all the second magnetic field measurement data.

8. The corrosion detection data acquisition device for substation grounding grid according to claim 7, characterized in that, The detection module includes a first data detection submodule and a second data detection submodule; The first data detection submodule is used to perform detection according to the first test path using the magnetic field detection device based on the detection status data, to obtain a first detection curve composed of several magnetic field data over time, and to determine each first measurement position based on the maximum value point of the first detection curve. Using each of the first measurement positions as the first measurement starting point, a first test direction corresponding to each of the first measurement starting points is determined based on each of the first measurement starting points and the first test path; Based on each first measurement starting point and the corresponding first test direction, a first detection path corresponding to each first measurement starting point is determined; Taking the time of the first measurement position as the order, the magnetic field detection device is used to perform detection according to each of the first detection paths based on the detection status data, so as to obtain a number of first magnetic field measurement data corresponding to each of the first detection paths; The second data detection submodule is used to perform detection according to the second test path using a magnetic field detection device based on the detection status data, and obtain a second detection curve composed of several magnetic field data over time. Based on the maximum value point of the second detection curve, each second measurement position is determined. Using each of the second measurement positions as the second measurement starting point, a second test direction is determined based on each of the second measurement starting points and the second test path; Based on each second measurement starting point and the corresponding second test direction, a second detection path corresponding to each second measurement starting point is determined; Using the time of the second measurement position as the order, the magnetic field detection device is used to perform detection according to each of the second detection paths based on the detection status data, thereby obtaining the second magnetic field measurement data corresponding to each of the second detection paths.

9. The corrosion detection data acquisition device for substation grounding grid according to claim 8, characterized in that, The first test direction is perpendicular to the first test path and points towards the center of the substation; and / or, the second test direction is perpendicular to the second test path and points towards the center of the substation.

10. A terminal device, characterized in that, Including the processor and memory; The memory is used to store program code and transmit the program code to the processor; The processor is configured to execute the corrosion detection data acquisition method for substation grounding grid as described in any one of claims 1-6 according to the instructions in the program code.

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