Grounding grid monitoring method and device based on digital twinning, terminal equipment and storage medium

Abstract

The invention discloses a grounding grid monitoring method and device based on digital twinning, terminal equipment and a storage medium. The method comprises the following steps: acquiring real-time operation data and physical parameters of a converter station hidden engineering grounding grid; constructing a multi-physical field simulation model based on the physical parameters; based on the real-time operation data, determining the test duration of the multi-physics field simulation model; and based on the real-time operation data and the test duration, performing simulation on the multi-physical field simulation model, and based on a simulation result, performing aging evaluation on the converter station hidden engineering grounding grid. According to the method, the physical parameters of the converter station hidden engineering grounding grid are acquired, the corresponding multi-physical field simulation model is constructed, and the test duration of the multi-physical field simulation model is calculated based on the real-time operation data, so that the simulation data of the converter station hidden engineering grounding grid can be acquired, and then aging evaluation is performed. According to the invention, automation of aging evaluation of the converter station hidden engineering grounding grid is realized, and the evaluation efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of digital twin technology, and in particular to a grounding grid monitoring method, device, terminal equipment and storage medium based on digital twin. Background Art

[0002] The hidden engineering grounding grid of the converter station is a general term for a mesh-structured electrical grounding system consisting of multiple grounding bodies buried underground and multiple grounding wires connected between the grounding bodies. The grounding grid mainly plays the role of electrical safety protection and shielding, and has a significant significance for protecting equipment safety and personal safety. The hidden engineering grounding grid of the converter station is relatively large and complex. It is usually a mesh structure composed of multiple grounding bodies driven into the ground and steel bars buried at a certain depth in the ground. All electrical equipment housings and the neutral point of the transformer in the power system are connected to the grounding grid, and the grounding resistance is required to meet national standards.

[0003] Since the grounding body of the grounding grid is generally made of angle steel or steel pipe, the grounding wire is generally made of steel bars, the grounding wire and the grounding body are connected by electric welding, and the grounding grid is generally required to be buried underground at a depth of ≥0.6m, then the grounding body and the grounding wire will inevitably rust and corrode, thereby affecting the grounding resistance of the grounding grid itself. If the degree of corrosion of the grounding grid is not monitored in time, the grounding resistance may exceed the standard or even invalid grounding may occur, resulting in safety hazards such as equipment burning and electric shock.

[0004] At present, grounding grid corrosion monitoring mainly relies on the regular manual inspection of the grounding resistance of the grounding grid by the front-line operation and maintenance personnel of the converter station, and then evaluates the health status of the grounding grid based on the measurement data. There are many measurement points in the entire grounding grid, which is very time-consuming and labor-intensive. In addition, due to the particularity of the location of the grounding grid, abnormal resistance can only be located by checking section by section, resulting in high intensity and low efficiency in monitoring the grounding grid of hidden projects.

[0005] Therefore, a grounding grid monitoring strategy is urgently needed to solve the problem of low monitoring efficiency of the grounding grid of the hidden engineering of the converter station. Summary of the invention

[0006] The embodiments of the present invention provide a grounding grid monitoring method, apparatus, terminal equipment and storage medium based on digital twins to solve the technical problem of low efficiency in monitoring the grounding grid of a hidden project in a converter station.

[0007] In order to solve the above problems, an embodiment of the present invention provides a grounding grid monitoring method based on digital twins, including:

[0008] Obtain real-time operating data and physical parameters of the hidden engineering grounding grid of the converter station;

[0009] Constructing a multi-physics field simulation model based on the physical parameters;

[0010] Based on the real-time operation data, confirm the test duration of the multi-physics field simulation model;

[0011] Based on the real-time operation data and the test duration, the multi-physical field simulation model is simulated, and based on the simulation results, an aging assessment of the hidden engineering grounding grid of the converter station is performed.

[0012] As an improvement of the above solution, the real-time operation data includes: ambient temperature and ambient humidity.

[0013] As an improvement of the above solution, the step of confirming the test duration of the multi-physics field simulation model based on the real-time operation data includes:

[0014] Obtaining the target trouble-free operating life of the hidden engineering grounding grid of the converter station;

[0015] Substitute the ambient temperature, ambient humidity and target trouble-free operating life into the material aging calculation formula to obtain the test duration of the converter station concealed engineering grounding grid; wherein the material aging calculation formula includes:

[0016]

[0017] Where AF is the acceleration factor, Ea is the energy consumed by the precipitation fault, K is the Boltzmann constant, T u is the current ambient temperature, T t is the ambient temperature under accelerated conditions, RH u is the ambient humidity, RH t is the ambient humidity under accelerated conditions, T is the test duration, and MTBF target is the trouble-free target operating life.

[0018] As an improvement of the above solution, simulating the multi-physics field simulation model based on the real-time operation data and the test duration includes:

[0019] Obtaining historical transient simulation calculation results of the multi-physics field simulation model;

[0020] During the test duration, the real-time operation data and the historical transient simulation calculation results are input into the multi-physical field simulation model for simulation to obtain the current multi-physical field simulation calculation results of the converter station concealed engineering grounding grid.

[0021] As an improvement of the above solution, the real-time operation data and the historical transient simulation calculation results are input into the multi-physics field simulation model for simulation, including:

[0022] Under the preset temperature field, electric field and force field, the real-time operation data and the historical transient simulation calculation results are input into the multi-physics field simulation model for forward calculation and state inversion to obtain the threshold range of each operating parameter of the hidden engineering grounding grid of the converter station, so as to complete the simulation of the hidden engineering grounding grid of the converter station.

[0023] As an improvement of the above solution, the aging assessment of the hidden engineering grounding grid of the converter station based on the simulation results includes:

[0024] Get the influence weight;

[0025] Based on the impact weight, test duration, target fault-free operating life, and threshold ranges of various operating parameters, an aging assessment is performed on the hidden engineering grounding grid of the converter station.

[0026] As an improvement of the above solution, the physical parameters include: construction drawings, installation drawings, materials, installation processes, equipment drawings and historical operation data; the multi-physics field simulation model is constructed based on the physical parameters, including:

[0027] Build 3D high-fidelity models based on construction drawings and installation drawings;

[0028] Build multi-physics simulation models based on 3D high-fidelity models, materials, installation processes, equipment drawings, and historical operating data.

[0029] Accordingly, an embodiment of the present invention further provides a grounding grid monitoring device based on digital twins, comprising: a data acquisition module, a model building module, a data calculation module and a result generation module;

[0030] The data acquisition module is used to obtain real-time operating data and physical parameters of the hidden engineering grounding grid of the converter station;

[0031] The model building module is used to build a multi-physics field simulation model based on the physical parameters;

[0032] The data calculation module is used to confirm the test duration of the multi-physics field simulation model based on the real-time operation data;

[0033] The result generation module is used to simulate the multi-physics field simulation model based on the real-time operation data and the test duration, and to perform aging evaluation of the hidden engineering grounding grid of the converter station based on the simulation results.

[0034] As an improvement of the above solution, the real-time operation data includes: ambient temperature and ambient humidity.

[0035] As an improvement of the above solution, the data calculation module includes: a data receiving unit and an aging calculation unit;

[0036] The data receiving unit is used to obtain the target fault-free operating life of the hidden engineering grounding grid of the converter station;

[0037] The aging calculation unit is used to substitute the ambient temperature, ambient humidity and fault-free target operating life into the material aging calculation formula to obtain the test duration of the converter station hidden engineering grounding network; wherein the material aging calculation formula includes:

[0038]

[0039] Where AF is the acceleration factor, Ea is the energy consumed by the precipitation fault, K is the Boltzmann constant, T u is the current ambient temperature, T t is the ambient temperature under accelerated conditions, RH u is the ambient humidity, RH t is the ambient humidity under accelerated conditions, T is the test duration, and MTBF target is the trouble-free target operating life.

[0040] As an improvement of the above solution, simulating the multi-physics field simulation model based on the real-time operation data and the test duration includes:

[0041] Obtaining historical transient simulation calculation results of the multi-physics field simulation model;

[0042] During the test duration, the real-time operation data and the historical transient simulation calculation results are input into the multi-physical field simulation model for simulation to obtain the current multi-physical field simulation calculation results of the converter station concealed engineering grounding grid.

[0043] As an improvement of the above solution, the real-time operation data and the historical transient simulation calculation results are input into the multi-physics field simulation model for simulation, including:

[0044] Under the preset temperature field, electric field and force field, the real-time operation data and the historical transient simulation calculation results are input into the multi-physics field simulation model for forward calculation and state inversion to obtain the threshold range of each operating parameter of the hidden engineering grounding grid of the converter station, so as to complete the simulation of the hidden engineering grounding grid of the converter station.

[0045] As an improvement of the above solution, the aging assessment of the hidden engineering grounding grid of the converter station based on the simulation results includes:

[0046] Get the influence weight;

[0047] Based on the impact weight, test duration, target fault-free operating life, and threshold ranges of various operating parameters, an aging assessment is performed on the hidden engineering grounding grid of the converter station.

[0048] As an improvement of the above solution, the physical parameters include: construction drawings, installation drawings, materials, installation processes, equipment drawings and historical operation data; the multi-physics field simulation model is constructed based on the physical parameters, including:

[0049] Build 3D high-fidelity models based on construction drawings and installation drawings;

[0050] Build multi-physics simulation models based on 3D high-fidelity models, materials, installation processes, equipment drawings, and historical operating data.

[0051] Correspondingly, an embodiment of the present invention also provides a computer terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, it implements a grounding grid monitoring method based on digital twins as described in the present invention.

[0052] Correspondingly, an embodiment of the present invention also provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute a grounding grid monitoring method based on digital twins as described in the present invention.

[0053] As can be seen from the above, the present invention has the following beneficial effects:

[0054] The present invention provides a method for extracting single objects of electric power equipment, obtaining real-time operation data and physical parameters of a hidden engineering grounding network of a converter station; constructing a multi-physical field simulation model based on the physical parameters; confirming the test duration of the multi-physical field simulation model based on the real-time operation data; simulating the multi-physical field simulation model based on the real-time operation data and the test duration, and performing an aging assessment of the hidden engineering grounding network of the converter station based on the simulation results. By obtaining the physical parameters of the hidden engineering grounding network of the converter station, constructing a corresponding multi-physical field simulation model, and then calculating the test duration of the multi-physical field simulation model based on the real-time operation data, the simulation data of the hidden engineering grounding network of the converter station can be obtained, and then an aging assessment can be performed. Compared with the prior art that performs aging investigation manually, the present invention realizes the automation of aging assessment of the hidden engineering grounding network of the converter station, greatly improving the assessment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a flow chart of a grounding grid monitoring method based on digital twins provided in one embodiment of the present invention;

[0056] Figure 2 It is a structural schematic diagram of a grounding grid monitoring device based on digital twin provided by one embodiment of the present invention;

[0057] Figure 3 This is a schematic diagram of the structure of a terminal device provided by an embodiment of the present invention;

[0058] Figure 4 It is a flow chart of a grounding grid monitoring method based on digital twin provided by another embodiment of the present invention. DETAILED DESCRIPTION

[0059] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] Embodiment 1

[0061] See also Figure 1 , Figure 1 is a flow chart of a grounding grid monitoring method based on digital twins provided by an embodiment of the present invention, such as Figure 1 As shown, this embodiment includes steps 101 to 104, and each step is specifically as follows:

[0062] Step 101: Acquire real-time operating data and physical parameters of the hidden engineering grounding grid of the converter station.

[0063] In this embodiment, the real-time operating data includes: ambient temperature and ambient humidity.

[0064] In a specific embodiment, the real-time operation data also includes: ground resistance, contact resistance, corrosion potential, soil resistivity, soil pH value, and geological settlement.

[0065] It should be noted that the real-time operation data is achieved through online monitoring and collection of data by sensors distributed on the hidden engineering grounding network of the converter station. The sensors include: temperature sensors, humidity sensors, geological settlement sensors, intelligent lightning current online monitors, intelligent grounding resistance online monitors and intelligent loop resistance online monitors, any one or more combinations thereof.

[0066] In a specific embodiment, the components of the hidden engineering grounding network of the converter station include: horizontal grounding bodies, vertical grounding bodies, cable trench grounding leads, pipeline grounding leads, and any one or more combinations of tinned copper stranded wires, copper-plated steel rods, galvanized steel pipes, galvanized flat steel, and copper noses.

[0067] Step 102: Construct a multi-physics field simulation model based on the physical parameters.

[0068] In this embodiment, the physical parameters include: construction drawings, installation drawings, materials, installation processes, equipment drawings and historical operation data; the multi-physics field simulation model is constructed based on the physical parameters, including:

[0069] Build 3D high-fidelity models based on construction drawings and installation drawings;

[0070] Build multi-physics simulation models based on 3D high-fidelity models, materials, installation processes, equipment drawings, and historical operating data.

[0071] Step 103: Based on the real-time operation data, confirm the test duration of the multi-physics field simulation model.

[0072] In this embodiment, the step of confirming the test duration of the multi-physics field simulation model based on the real-time operation data includes:

[0073] Obtaining the target trouble-free operating life of the hidden engineering grounding grid of the converter station;

[0074] Substitute the ambient temperature, ambient humidity and target trouble-free operating life into the material aging calculation formula to obtain the test duration of the converter station concealed engineering grounding grid; wherein the material aging calculation formula includes:

[0075]

[0076] Where AF is the acceleration factor, Ea is the energy consumed by the precipitation fault, K is the Boltzmann constant, T u is the current ambient temperature, T t is the ambient temperature under accelerated conditions, RH u is the ambient humidity, RH t is the ambient humidity under accelerated conditions, T is the test duration, and MTBF target is the trouble-free target operating life.

[0077] Step 104: Based on the real-time operation data and the test duration, the multi-physics field simulation model is simulated, and an aging assessment of the converter station concealed engineering grounding grid is performed based on the simulation results.

[0078] In this embodiment, simulating the multi-physics field simulation model based on the real-time operation data and the test duration includes:

[0079] Obtaining historical transient simulation calculation results of the multi-physics field simulation model;

[0080] During the test duration, the real-time operation data and the historical transient simulation calculation results are input into the multi-physical field simulation model for simulation to obtain the current multi-physical field simulation calculation results of the converter station concealed engineering grounding grid.

[0081] In a specific embodiment, the multi-physics field simulation model can use the COMSOL Multiphysics platform to perform simulation calculations.

[0082] It should be noted that the difference between the simulation calculation of the present invention and the existing multi-physics field simulation calculation is that the multi-physics field simulation model will iterate according to the transient simulation results, and the historical multi-physics field simulation results will be integrated into the simulation calculation process as calculation parameters.

[0083] In this embodiment, the real-time operation data and the historical transient simulation calculation results are input into the multi-physics field simulation model for simulation, including:

[0084] Under the preset temperature field, electric field and force field, the real-time operation data and the historical transient simulation calculation results are input into the multi-physics field simulation model for forward calculation and state inversion, and the threshold ranges of various operation parameters of the hidden engineering grounding grid of the converter station are iterated to complete the simulation of the hidden engineering grounding grid of the converter station.

[0085] In this embodiment, the aging assessment of the hidden engineering grounding grid of the converter station based on the simulation results includes:

[0086] Get the influence weight;

[0087] Based on the impact weight, test duration, target fault-free operating life, and threshold ranges of various operating parameters, an aging assessment is performed on the hidden engineering grounding grid of the converter station.

[0088] In a specific embodiment, in the step of comprehensively diagnosing the operating status of the hidden engineering grounding grid of the converter station in combination with the aging of the grounding grid materials and the results of multi-physical field simulation calculations, the real-time operating data of the hidden engineering grounding grid of the converter station is input into a pre-established grounding grid status assessment model to iterate the corresponding impact weights; based on the material aging model, the acceleration factor of the hidden engineering grounding grid of the converter station is calculated, and in combination with the target service life, the test duration is calculated, and in combination with the historical monitoring data and the simulation results, it is calculated whether there is a risk of failure in the grounding grid; according to the corresponding impact weights, in combination with the aging of the grounding grid materials and the results of multi-physical field simulation calculations, a comprehensive diagnosis of the operating status of the hidden engineering grounding grid of the converter station is performed.

[0089] In a specific embodiment, the aging assessment includes:

[0090] S1: Data collection: Collect the real-time operating data of the hidden engineering grounding network of the converter station, including current, voltage, resistance and other related parameters. These data can be obtained through sensors, monitoring equipment or system logs;

[0091] S2: Establish a grounding grid status assessment model: According to the actual situation and needs, establish a grounding grid status assessment model. The model can include various parameters and factors, such as the geometric structure of the grounding grid, material properties, grounding resistance, etc.

[0092] S3: Determine the impact weights: Based on professional knowledge and experience, determine the weights of various factors that affect the grounding grid status. These weights can be determined through expert interviews, data analysis, and statistical methods;

[0093] S4: Iterative calculation: Input the real-time operation data into the grounding grid status assessment model, and perform weighted calculation on each factor according to the influence weight. Based on the calculation results, evaluate the status of the grounding grid and compare and analyze it with historical data;

[0094] S5: Update weights: Adjust and update the impact weights based on the evaluation results and actual conditions. The accuracy and reliability of the weights can be continuously optimized and improved through feedback mechanisms and expert reviews;

[0095] S6: Result analysis and report generation: Generate a comprehensive report on the grounding grid status based on the evaluation results and analysis. The report can include information such as the health status of the grounding grid, potential problems, and risk assessment, so that decision makers and maintenance personnel can make corresponding measures and decisions.

[0096] Preferably, there are steps for storing the real-time operating data of the converter station concealed engineering grounding network and the corresponding environmental data and historical operating data, and for dynamically displaying the operating process of the concealed engineering grounding network through a three-dimensional high-fidelity model and providing information interactive feedback.

[0097] For a better explanation, see Figure 4 , Figure 4 A schematic flow chart of a grounding grid monitoring method based on digital twins provided as another embodiment.

[0098] See also Figure 2 , Figure 2 It is a structural schematic diagram of a grounding grid monitoring device based on digital twins provided in one embodiment of the present invention, comprising: a data acquisition module 201, a model construction module 202, a data calculation module 203 and a result generation module 204;

[0099] The data acquisition module is used to obtain real-time operating data and physical parameters of the hidden engineering grounding grid of the converter station;

[0100] The model building module is used to build a multi-physics field simulation model based on the physical parameters;

[0101] The data calculation module is used to confirm the test duration of the multi-physics field simulation model based on the real-time operation data;

[0102] The result generation module is used to simulate the multi-physics field simulation model based on the real-time operation data and the test duration, and to perform aging evaluation of the hidden engineering grounding grid of the converter station based on the simulation results.

[0103] It can be understood that the above-mentioned system item embodiments correspond to the method item embodiments of the present invention, which can implement the digital twin-based grounding grid monitoring method provided by any of the above-mentioned method item embodiments of the present invention.

[0104] This embodiment obtains the real-time operating data and physical parameters of the hidden engineering grounding grid of the converter station; constructs a multi-physical field simulation model based on the physical parameters; confirms the test duration of the multi-physical field simulation model based on the real-time operating data; simulates the multi-physical field simulation model based on the real-time operating data and the test duration, and performs an aging assessment of the hidden engineering grounding grid of the converter station based on the simulation results. By obtaining the physical parameters of the hidden engineering grounding grid of the converter station, constructing the corresponding multi-physical field simulation model, and then calculating the test duration of the multi-physical field simulation model based on the real-time operating data, it is possible to obtain the simulation data of the hidden engineering grounding grid of the converter station, and then perform an aging assessment. Compared with the prior art that performs aging investigation manually, the present invention realizes the automation of aging assessment of the hidden engineering grounding grid of the converter station, greatly improving the assessment efficiency.

[0105] Embodiment 2

[0106] See also Figure 3 , Figure 3 It is a schematic diagram of the structure of a terminal device provided in one embodiment of the present invention.

[0107] A terminal device of this embodiment includes: a processor 301, a memory 302, and a computer program stored in the memory 302 and executable on the processor 301. When the processor 301 executes the computer program, the steps of the above-mentioned grounding grid monitoring method based on digital twins in the embodiment are implemented, for example Figure 1 Alternatively, when the processor executes the computer program, the functions of each module in the above-mentioned device embodiments are implemented, for example: Figure 2 All modules of the digital twin-based grounding grid monitoring device are shown.

[0108] In addition, an embodiment of the present invention also provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the digital twin-based grounding grid monitoring method as described in any of the above embodiments.

[0109] Those skilled in the art will understand that the schematic diagram is merely an example of a terminal device and does not constitute a limitation on the terminal device. The terminal device may include more or fewer components than shown in the diagram, or a combination of certain components, or different components. For example, the terminal device may also include input and output devices, network access devices, buses, etc.

[0110] The processor 301 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor 301 is the control center of the terminal device, and uses various interfaces and lines to connect various parts of the entire terminal device.

[0111] The memory 302 can be used to store the computer program and / or module. The processor 301 implements various functions of the terminal device by running or executing the computer program and / or module stored in the memory and calling the data stored in the memory 302. The memory 302 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0112] Wherein, if the module / unit integrated in the terminal device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Wherein, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, etc.

[0113] It should be noted that the device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, in the accompanying drawings of the device embodiments provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines. A person of ordinary skill in the art may understand and implement it without paying any creative effort.

[0114] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A grounding grid monitoring method based on digital twin, characterized in that: include: Obtain real-time operating data and physical parameters of the hidden engineering grounding grid of the converter station; Constructing a multi-physics field simulation model based on the physical parameters; Based on the real-time operation data, confirm the test duration of the multi-physics field simulation model; Based on the real-time operation data and the test duration, the multi-physical field simulation model is simulated, and based on the simulation results, an aging assessment of the hidden engineering grounding grid of the converter station is performed.

2. The grounding grid monitoring method based on digital twin according to claim 1 is characterized in that: The real-time operation data includes: ambient temperature and ambient humidity.

3. The grounding grid monitoring method based on digital twin according to claim 2 is characterized in that: The step of confirming the test duration of the multi-physics field simulation model based on the real-time operation data includes: Obtaining the target trouble-free operating life of the hidden engineering grounding grid of the converter station; Substitute the ambient temperature, ambient humidity and target trouble-free operating life into the material aging calculation formula to obtain the test duration of the converter station concealed engineering grounding grid; wherein the material aging calculation formula includes: Where AF is the acceleration factor, Ea is the energy consumed by the precipitation fault, K is the Boltzmann constant, T u is the current ambient temperature, T t is the ambient temperature under accelerated conditions, RH u is the ambient humidity, RH t is the ambient humidity under accelerated conditions, T is the test duration, and MTBF target is the trouble-free target operating life.

4. The grounding grid monitoring method based on digital twin according to claim 3 is characterized in that: The simulating the multi-physics field simulation model based on the real-time operation data and the test duration includes: Obtaining historical transient simulation calculation results of the multi-physics field simulation model; During the test duration, the real-time operation data and the historical transient simulation calculation results are input into the multi-physical field simulation model for simulation to obtain the current multi-physical field simulation calculation results of the converter station concealed engineering grounding grid.

5. The grounding grid monitoring method based on digital twin according to claim 4 is characterized in that: The step of inputting the real-time operation data and the historical transient simulation calculation results into the multi-physics field simulation model for simulation includes: Under the preset temperature field, electric field and force field, the real-time operation data and the historical transient simulation calculation results are input into the multi-physics field simulation model for forward calculation and state inversion to obtain the threshold range of each operating parameter of the hidden engineering grounding grid of the converter station, so as to complete the simulation of the hidden engineering grounding grid of the converter station.

6. The grounding grid monitoring method based on digital twin according to claim 5 is characterized in that: The aging assessment of the hidden engineering grounding grid of the converter station based on the simulation results includes: Get the influence weight; Based on the impact weight, test duration, target fault-free operating life, and threshold ranges of various operating parameters, an aging assessment is performed on the hidden engineering grounding grid of the converter station.

7. The grounding grid monitoring method based on digital twin according to claim 1 is characterized in that: The physical parameters include: construction drawings, installation drawings, materials, installation processes, equipment drawings and historical operation data; the multi-physics field simulation model is constructed based on the physical parameters, including: Build 3D high-fidelity models based on construction drawings and installation drawings; Build multi-physics simulation models based on 3D high-fidelity models, materials, installation processes, equipment drawings, and historical operating data.

8. A grounding grid monitoring device based on digital twin, characterized in that: include: Data acquisition module, model building module, data calculation module and result generation module; The data acquisition module is used to obtain real-time operating data and physical parameters of the hidden engineering grounding grid of the converter station; The model building module is used to build a multi-physics field simulation model based on the physical parameters; The data calculation module is used to confirm the test duration of the multi-physics field simulation model based on the real-time operation data; The result generation module is used to simulate the multi-physics field simulation model based on the real-time operation data and the test duration, and to perform aging evaluation of the hidden engineering grounding grid of the converter station based on the simulation results.

9. The grounding grid monitoring device based on digital twin according to claim 8, characterized in that: The real-time operation data includes: ambient temperature and ambient humidity.

10. The grounding grid monitoring device based on digital twin according to claim 9, characterized in that: The data calculation module includes: a data receiving unit and an aging calculation unit; The data receiving unit is used to obtain the target fault-free operating life of the hidden engineering grounding grid of the converter station; The aging calculation unit is used to substitute the ambient temperature, ambient humidity and fault-free target operating life into the material aging calculation formula to obtain the test duration of the converter station hidden engineering grounding network; wherein the material aging calculation formula includes: Where AF is the acceleration factor, Ea is the energy consumed by the precipitation fault, K is the Boltzmann constant, T u is the current ambient temperature, T t is the ambient temperature under accelerated conditions, RH u is the ambient humidity, RH t is the ambient humidity under accelerated conditions, T is the test duration, and MTBF target is the trouble-free target operating life.

11. The grounding grid monitoring device based on digital twin according to claim 10, characterized in that: The simulating the multi-physics field simulation model based on the real-time operation data and the test duration includes: Obtaining historical transient simulation calculation results of the multi-physics field simulation model; During the test duration, the real-time operation data and the historical transient simulation calculation results are input into the multi-physical field simulation model for simulation to obtain the current multi-physical field simulation calculation results of the converter station concealed engineering grounding grid.

12. The grounding grid monitoring device based on digital twin according to claim 11, characterized in that: The step of inputting the real-time operation data and the historical transient simulation calculation results into the multi-physics field simulation model for simulation includes: Under the preset temperature field, electric field and force field, the real-time operation data and the historical transient simulation calculation results are input into the multi-physics field simulation model for forward calculation and state inversion to obtain the threshold range of each operating parameter of the hidden engineering grounding grid of the converter station, so as to complete the simulation of the hidden engineering grounding grid of the converter station.

13. The grounding grid monitoring device based on digital twin according to claim 12, characterized in that: The aging assessment of the hidden engineering grounding grid of the converter station based on the simulation results includes: Get the influence weight; Based on the impact weight, test duration, target fault-free operating life, and threshold ranges of various operating parameters, an aging assessment is performed on the hidden engineering grounding grid of the converter station.

14. The grounding grid monitoring device based on digital twin according to claim 8, characterized in that: The physical parameters include: construction drawings, installation drawings, materials, installation processes, equipment drawings and historical operation data; the multi-physics field simulation model is constructed based on the physical parameters, including: Build 3D high-fidelity models based on construction drawings and installation drawings; Build multi-physics simulation models based on 3D high-fidelity models, materials, installation processes, equipment drawings, and historical operating data.

15. A computer terminal device, characterized in that: It includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements a digital twin grounding grid monitoring method as described in any one of claims 1 to 7.

16. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored computer program, wherein, when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute a digital twin grounding grid monitoring method as described in any one of claims 1 to 7.

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