An overhead ground wire induced current suppression method, system, device and medium

Abstract

The application relates to the technical field of power systems, and discloses an overhead ground wire induced current suppression method, system, device and medium. The method comprises the following steps: acquiring basic parameters of a target line, and performing structured modeling on the basic parameters to obtain a target line topology model; performing parameterized coding on the target line topology model to obtain an initial simulation file, and modifying the initial simulation file based on real-time simulation parameters to obtain a target simulation file; running the target simulation file to obtain electromagnetic transient simulation data, and performing analysis calculation on the electromagnetic transient simulation data to obtain ground wire current time domain distribution data; comparing the ground wire current time domain distribution data with a preset current threshold to obtain a plurality of overrun sections, and performing circulating current type identification on each overrun section to obtain a structured alarm result corresponding to the overrun section; and matching a ground wire induced current suppression measure corresponding to each overrun section according to each overrun degree. The application realizes intelligent management and control of the ground wire induced current.

Description

Technical Field

[0001] This invention relates to the field of power system technology, and in particular to a method, system, device and medium for suppressing induced current in overhead ground wires. Background Technology

[0002] Currently, multi-circuit parallel transmission lines have become the mainstream method for power transmission, especially widely used in substation outlet sections and areas surrounding converter stations. While this transmission structure is designed to improve power transmission efficiency and reliability, the small spacing between conductors in each circuit inevitably leads to strong electromagnetic interference. This interference causes superimposed induced potentials and circulating currents in the ground wire, with the superposition effect being more pronounced in long-distance transmission scenarios. Continuous induced currents not only reduce line insulation performance, accelerate equipment degradation, and shorten equipment lifespan, but also cause additional energy losses, significantly increasing equipment maintenance and replacement costs, and seriously threatening the safe and stable operation of the power system. Therefore, in the planning, design, operation, and maintenance of multi-circuit overhead transmission lines, rapid and accurate calculation of the induced voltage and current in the ground wire is crucial.

[0003] Current methods for calculating ground wire induced current mainly involve two approaches: numerical simulation and theoretical analysis. Numerical simulation suffers from low computational efficiency (requiring resetting internal parameters for each simulation) and high technical barriers (requiring professional personnel to modify the simulation program). Theoretical analysis methods, such as empirical formulas, lack accuracy, database queries have limited coverage, and simplified models have poor adaptability; none of these methods can meet the needs of rapid decision-making in engineering projects.

[0004] Therefore, it is urgent to study a fast calculation method for ground wire induced current in order to achieve effective suppression. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention provides a method, system, device, and medium for suppressing induced current in overhead ground wires.

[0006] In a first aspect, embodiments of the present invention provide a method for suppressing induced current in overhead ground wires, comprising:

[0007] Obtain the basic parameters of the target route, and perform structured modeling on the basic parameters to obtain the topology model of the target route;

[0008] The target line topology model is parametrically encoded to obtain an initial simulation file, and the initial simulation file is modified based on real-time simulation parameters to obtain the target simulation file;

[0009] The target simulation file is run using power simulation software to obtain electromagnetic transient simulation data, and the electromagnetic transient simulation data is analyzed and calculated to obtain the time-domain distribution data of the ground wire current.

[0010] The ground current time-domain distribution data and the preset current threshold are compared to obtain several over-limit sections, and the circulating current type of each over-limit section is identified to obtain the structured alarm result corresponding to the over-limit section.

[0011] The degree of exceeding the limit for each of the above-mentioned over-limit sections is determined based on a preset over-limit classification threshold, and ground wire induced current suppression measures are matched to the corresponding over-limit sections according to the degree of exceeding the limit.

[0012] Preferably, the step of obtaining the basic parameters of the target line and performing structured modeling on the basic parameters to obtain the target line topology model includes:

[0013] Basic parameters are obtained by surveying and collecting data on the target route, including geometric parameters, electrical parameters, and environmental parameters;

[0014] Based on the aforementioned basic parameters, an initial line topology model of the target line is constructed using power simulation software;

[0015] The initial line topology model is simulated and verified to obtain the target line topology model.

[0016] Preferably, before modifying the initial simulation file based on real-time simulation parameters to obtain the target simulation file, the method further includes:

[0017] Based on the simulation requirements of overhead ground wire induced current, the variable operating parameters of the target line topology model are determined, and the storage location of the variable operating parameters is extracted from the initial simulation file. The variable operating parameters include grounding method, grounding resistance, line length, and power flow parameters.

[0018] Preferably, the step of modifying the initial simulation file based on real-time simulation parameters to obtain the target simulation file includes:

[0019] Receive real-time simulation parameters input by the user and map the real-time simulation parameters to the corresponding variables in the initial simulation file;

[0020] The initial simulation file is parsed to obtain the storage location of the corresponding variable, and the corresponding variable is updated numerically based on the storage location to obtain the target simulation file.

[0021] Preferably, the step of calling the power simulation software to run the target simulation file to obtain electromagnetic transient simulation data, and then performing analytical calculations on the electromagnetic transient simulation data to obtain the time-domain distribution data of the ground current, includes:

[0022] Electromagnetic transient simulation was performed on the target simulation file using ATP-EMTP software to obtain electromagnetic transient simulation data.

[0023] The electromagnetic transient simulation data is used to extract the original waveform of the ground current, and the original waveform of the ground current is then analyzed in the time domain and spatially mapped to obtain the time domain distribution data of the ground current.

[0024] Preferably, the ground current time-domain distribution data includes several span currents;

[0025] The process involves comparing the ground current time-domain distribution data with a preset current threshold to obtain several over-limit sections, and identifying the circulating current type for each over-limit section to obtain a structured alarm result corresponding to that over-limit section, including:

[0026] By comparing the current of each specified span with the preset current threshold, several over-limit sections are obtained.

[0027] Based on the proportion of ground current amplitude, the circulation type of each of the above-limit sections is identified to obtain the circulation type of the corresponding above-limit section. The circulation type includes inter-ground current and ground current.

[0028] Based on the over-limit location and circulation type corresponding to each over-limit segment, a structured alarm result is generated for the corresponding over-limit segment.

[0029] Preferably, the step of determining the degree of exceedance of each exceedance segment based on a preset exceedance classification threshold, and matching ground wire induced current suppression measures for each exceedance segment according to the degree of exceedance, includes:

[0030] The degree of exceeding the limit for each of the above-mentioned limit-exceeding segments is determined based on a preset limit-exceeding classification threshold, wherein the degree of exceeding the limit includes minor limit exceeding and severe limit exceeding;

[0031] Based on the over-limit section where the over-limit degree is slightly over-limit, a first ground wire induced current suppression measure is matched, wherein the first ground wire induced current suppression measure includes adjusting the ground wire segmentation and installing a surge arrester;

[0032] Based on the over-limit section where the over-limit degree is the severe over-limit, a second ground wire induced current suppression measure is matched, wherein the second ground wire induced current suppression measure includes modifying the grounding grid and replacing the high-resistance ground wire.

[0033] Secondly, embodiments of the present invention provide an overhead ground wire induced current suppression system, comprising:

[0034] The topology construction module is used to obtain the basic parameters of the target line and perform structured modeling on the basic parameters to obtain the topology model of the target line.

[0035] The file generation module is used to parametrically encode the target line topology model to obtain an initial simulation file, and modify the initial simulation file based on real-time simulation parameters to obtain the target simulation file;

[0036] The current calculation module is used to call the power simulation software to run the target simulation file to obtain electromagnetic transient simulation data, and to perform analytical calculations on the electromagnetic transient simulation data to obtain the time-domain distribution data of the ground wire current.

[0037] An alarm generation module is used to compare the ground current time-domain distribution data with a preset current threshold to obtain several over-limit sections, and to identify the circulating current type of each over-limit section to obtain a structured alarm result corresponding to the over-limit section.

[0038] The suppression matching module is used to determine the degree of exceeding the limit for each of the exceeding-limit segments based on a preset exceeding-limit classification threshold, and to match the ground wire induced current suppression measures for the corresponding exceeding-limit segment according to each degree of exceeding the limit.

[0039] Thirdly, embodiments of the present invention provide a terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program to implement the overhead ground wire induced current suppression method as described above.

[0040] Fourthly, embodiments of the present invention provide a computer-readable storage medium, the computer-readable storage medium including a stored computer program, wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to perform the overhead ground wire induced current suppression method as described above.

[0041] Compared with existing technologies, the overhead ground wire induced current suppression method, system, equipment, and medium of this invention have the following advantages: A topology model is constructed based on the target line's fundamental parameters and parameterized, and a target simulation file is dynamically generated by combining real-time simulation parameters, ensuring a high degree of consistency between simulation results and actual operating conditions; electromagnetic transient data is acquired through power simulation software, and the time-domain distribution of ground wire current is analyzed to accurately locate over-limit sections and identify circulating current types, providing an intuitive basis for operation and maintenance through structured alarm results; a preset over-limit classification threshold is introduced for severity determination, matching differentiated suppression measures, effectively improving the safety and reliability of the transmission line grounding system. This invention achieves intelligent control of ground wire induced current through a closed-loop process of "modeling-simulation-analysis-decision". Attached Figure Description

[0042] Figure 1 This is a flowchart illustrating a method for suppressing induced current in overhead ground wires according to an embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram of the circulation type in an embodiment of the present invention;

[0044] Figure 3 This is a schematic diagram of the structure of an overhead ground wire induced current suppression system according to an embodiment of the present invention;

[0045] Figure 4 This is a schematic diagram of the structure of a terminal device according to an embodiment of the present invention;

[0046] Figure label:

[0047] 1. Topology building module; 2. File generation module; 3. Current calculation module; 4. Alarm generation module; 5. Suppression matching module; 5000. Terminal device; 5001. Processor; 5002. Bus; 5003. Memory; 5004. Transceiver. Detailed Implementation

[0048] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0049] In the description of this invention, it should be understood that the terms "first" and "second," etc., are used to distinguish different objects, rather than to describe a specific order.

[0050] In the description of this invention, it should be noted that, unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by those skilled in the art. The terminology used in this specification is for the purpose of describing specific embodiments only and is not intended to limit the invention. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] like Figure 1 The diagram shown is a flowchart illustrating a method for suppressing induced current in overhead ground wires according to an embodiment of the present invention. (Refer to...) Figure 1 An embodiment of the present invention provides a method for suppressing induced current in overhead ground wires, comprising the following steps:

[0052] S1. Obtain the basic parameters of the target line and perform structured modeling on the basic parameters to obtain the topology model of the target line;

[0053] The target line of this invention is a power transmission line that is constructed using multiple parallel circuits. An overhead ground wire is erected above the power transmission line, and the two form an organic whole through electromagnetic coupling. That is, the power transmission line is the main body for power transmission, and the overhead ground wire provides lightning protection for the power transmission line.

[0054] Specifically, step S1 includes:

[0055] 1) Conduct surveys and data collection on the target route to obtain basic parameters;

[0056] The target route is surveyed and data is collected to obtain GIM (Geographic Information Model) data, and basic parameters are extracted from the GIM data. These basic parameters include geometric parameters, electrical parameters, and environmental parameters.

[0057] GIM data includes geospatial data, line body data, and surrounding environmental data. Specifically, geospatial data is acquired through satellite remote sensing and UAV aerial surveying; line body data is collected using design drawings or on-site measurements; and surrounding environmental data is obtained through remote sensing interpretation. Furthermore, geometric parameters extracted from GIM data include conductor type, number of splits, geometric arrangement, and sag data; electrical parameters include voltage level, short-circuit capacity, and neutral grounding method; and environmental parameters include soil resistivity.

[0058] 2) Based on the basic parameters, an initial line topology model of the target line is constructed using power simulation software;

[0059] The power simulation software used in this embodiment is ATP-EMTP. In ATP-EMTP, the LCC module is used to transform the basic parameters into an initial line topology model according to the electrical connection logic. Specifically, a suitable frequency-varying or constant parameter model is selected, and the spatial coordinates of the conductors are input to simulate the actual arrangement; the tower structure is implemented through the Branch module, and the grounding resistance is represented by RLC elements.

[0060] 3) Simulate and verify the initial line topology model to obtain the target line topology model.

[0061] The initial line topology model is verified by no-load or short-circuit simulations to obtain the target line topology model. Verifying the accuracy of the initial line topology model ensures that the simulation results match theoretical calculations or measured data.

[0062] S2. Parametrically encode the target line topology model to obtain the initial simulation file, and modify the initial simulation file based on the real-time simulation parameters to obtain the target simulation file;

[0063] The target line topology model is an abstract representation of the line's physical structure. This physical structure needs to be converted into text instructions, forming an input file that can be parsed by power simulation software. Therefore, the target line topology model is parametrically encoded to obtain an initial simulation file, which serves as the carrier for converting the line's physical structure into simulation instructions.

[0064] To enhance the flexibility of the target line topology model, it is necessary to define adjustable key parameters, i.e., variable operating parameters. Therefore, before modifying the initial simulation file based on real-time simulation parameters to obtain the target simulation file, the process includes: determining the variable operating parameters of the target line topology model based on the simulation requirements of overhead ground wire induced current, and extracting the storage location of these variable operating parameters from the initial simulation file. Variable operating parameters include grounding method, grounding resistance, line length, and power flow parameters. The storage location of these variable operating parameters is extracted from the initial simulation file so that they can be dynamically modified via external scripts or interfaces.

[0065] Furthermore, the target simulation file is obtained by modifying the initial simulation file based on real-time simulation parameters, including the following steps:

[0066] 1) Receive real-time simulation parameters input by the user and map the real-time simulation parameters to the corresponding variables in the initial simulation file;

[0067] In practice, a user-friendly interface is needed to receive real-time simulation parameters input by the user. Specifically, this interface can be implemented using MATLAB and includes a parameter input area (drop-down menus, text boxes), a threshold setting area, and a result display area (tables, graphs). Furthermore, the interface supports data validation to ensure that the input parameters conform to physical constraints, executes the simulation by calling power simulation software, and finally visualizes the results.

[0068] The real-time simulation parameters input through the user interface are automatically matched to the corresponding variables in the initial simulation file through a predefined mapping table. For example, if the input real-time simulation parameters are a grounding resistance of 10Ω and a line length of 50km, the corresponding variables are R_Tower=10 and LENGTH=50.

[0069] 2) Parse the initial simulation file to obtain the storage location of the corresponding variables, and update the values ​​of the corresponding variables based on the storage location to obtain the target simulation file.

[0070] The initial simulation file is parsed using MATLAB scripts, the storage location of the corresponding variables is located, the new values ​​are replaced, and the file is saved as a new simulation file, i.e., the target simulation file, thus avoiding syntax errors from manual modification.

[0071] S3. Call the power simulation software to run the target simulation file to obtain electromagnetic transient simulation data, and perform analytical calculations on the electromagnetic transient simulation data to obtain the time-domain distribution data of the ground wire current;

[0072] Specifically, step S3 includes:

[0073] 1) Electromagnetic transient simulation was performed on the target simulation file using ATP-EMTP software to obtain electromagnetic transient simulation data;

[0074] Start the ATP-EMTP program to perform electromagnetic transient simulation and obtain electromagnetic transient simulation data. This process supports background operation and does not block the user interface interaction.

[0075] 2) Extract the original waveform of the ground current from the electromagnetic transient simulation data, and perform time-domain analysis and spatial mapping on the original waveform of the ground current to obtain the time-domain distribution data of the ground current.

[0076] Since the electromagnetic transient simulation data is output in the standard ATP-EMTP output format .pl4 file, the original waveform of the ground wire current is extracted from the .pl4 file. Further, time-domain features are extracted from the original ground wire current waveform. Power frequency, harmonics, and transient components are separated using Fourier transform or wavelet decomposition. Characteristic parameters such as the peak value, effective value, phase angle, and time-domain rate of change of the ground wire current are calculated. A spatial coordinate system is constructed based on the target line topology model, and the ground wire current data is spatially interpolated and gridded according to tower number and span position. Finally, spatiotemporal data fusion generates time-domain distribution data of the ground wire current, indexed by the spatial coordinates of the target line, intuitively reflecting the current distribution along the line.

[0077] S4. Compare the ground current time-domain distribution data with the preset current threshold to obtain several over-limit sections, and identify the circulating current type of each over-limit section to obtain the structured alarm result of the corresponding over-limit section.

[0078] Specifically, the ground wire current time-domain distribution data includes several span currents. Further, step S4 includes:

[0079] 1) Compare the current of each range with the preset current threshold to obtain several over-limit sections;

[0080] In this embodiment, a preset current threshold of 100A is set. This threshold can be set by the user in the threshold setting area of ​​the operation interface described above. If the current of a certain span exceeds the preset current threshold, the tower section corresponding to that span current is marked as an over-limit section.

[0081] 2) Identify the circulating current type for each over-limit section based on the proportion of ground current amplitude to obtain the circulating current type of the corresponding over-limit section;

[0082] like Figure 2 The diagram shown is a schematic representation of the circulation type according to an embodiment of the present invention. (Refer to...) Figure 2 The circulation types include inter-groundline circulation and groundline geodetic circulation.

[0083] If the current amplitudes of the two ground wires are close, it means that the current mainly flows between the ground wires, i.e., the current circulation between the ground wires; if the current amplitude of one ground wire is significantly greater than that of the other ground wire, it means that the current mainly flows back through the earth, i.e., the current circulation between the ground wires and the earth.

[0084] The identification process for the two types of circulation is explained quantitatively below:

[0085] The current amplitudes of the two ground wires are respectively and , , ,but:

[0086] like If the current exceeds the empirical threshold, it is identified as inter-ground circulation; otherwise, it is identified as ground circulation.

[0087] 3) Based on the over-limit location and circulation type corresponding to each over-limit section, a structured alarm result for the corresponding over-limit section is constructed.

[0088] Specifically, the structured alarm results include the location of the over-limit and the type of circulating current. Furthermore, corresponding troubleshooting suggestions can be generated based on the circulating current type. For example, for abnormal circulating current between ground wires, the insulation status of the line should be checked first; for abnormal circulating current in the ground wire, the grounding system should be checked first, including but not limited to grounding resistance and soil resistivity. The final result is a structured alarm that includes the location of the over-limit, the type of circulating current, and troubleshooting suggestions.

[0089] S5. Determine the degree of exceeding the limit for each exceeding segment based on the preset exceeding limit classification threshold, and match the ground wire induced current suppression measures for each exceeding limit segment according to the degree of exceeding the limit.

[0090] Specifically, step S5 includes:

[0091] 1) Determine the degree of exceeding the limit for each exceeding segment based on the preset exceeding limit classification threshold;

[0092] The degree of exceeding the limit is divided into minor and severe exceeding the limit. In this embodiment, the preset threshold for exceeding the limit is set to 120A. That is, if the span current in the exceeding limit section is between 100A and 120A, the degree of exceeding the limit is determined to be minor; if the span current in the exceeding limit section exceeds 120A, the degree of exceeding the limit is determined to be severe.

[0093] 2) For over-limit sections where the over-limit degree is slightly over-limit, a first ground wire induced current suppression measure is applied;

[0094] Specifically, the measures to suppress induced current in the first ground wire include adjusting the ground wire segmentation and installing surge arresters.

[0095] 3) For over-limit sections where the over-limit level is severely over-limited, a second ground wire induced current suppression measure is matched.

[0096] Specifically, measures to suppress induced current in the second ground wire include modifying the grounding grid and replacing the ground wire with a high-resistance one.

[0097] This invention discloses a method for suppressing induced current in overhead ground wires. It constructs a topology model based on the target line's fundamental parameters and parametrically encodes it. Combined with real-time simulation parameters, it dynamically generates a target simulation file, ensuring a high degree of consistency between simulation results and actual operating conditions. Electromagnetic transient data is acquired through power simulation software, and the time-domain distribution of ground wire current is analyzed to accurately locate over-limit sections and identify circulating current types. Structured alarm results provide intuitive guidance for operation and maintenance. A preset over-limit classification threshold is introduced to determine the degree of severity, matching differentiated suppression measures and effectively improving the safety and reliability of the transmission line grounding system. This invention achieves intelligent control of ground wire induced current through a closed-loop process of "modeling-simulation-analysis-decision-making."

[0098] like Figure 3 The diagram shown is a structural schematic of an overhead ground wire induced current suppression system according to an embodiment of the present invention. (Refer to...) Figure 3 An embodiment of the present invention provides an overhead ground wire induced current suppression system, comprising:

[0099] Topology construction module 1 is used to obtain the basic parameters of the target line and perform structured modeling on the basic parameters to obtain the topology model of the target line;

[0100] File generation module 2 is used to parametrically encode the target line topology model to obtain the initial simulation file, and modify the initial simulation file based on the real-time simulation parameters to obtain the target simulation file;

[0101] The current calculation module 3 is used to call the power simulation software to run the target simulation file to obtain electromagnetic transient simulation data, and to perform analytical calculations on the electromagnetic transient simulation data to obtain the time-domain distribution data of the ground wire current.

[0102] Alarm generation module 4 is used to compare the ground current time-domain distribution data with the preset current threshold to obtain several over-limit sections, and to identify the circulating current type of each over-limit section to obtain the structured alarm result of the corresponding over-limit section.

[0103] The suppression matching module 5 is used to determine the degree of exceeding the limit of each exceeding segment based on a preset exceeding limit classification threshold, and to match the ground wire induced current suppression measures for each exceeding limit segment according to the degree of exceeding the limit.

[0104] It should be noted that each module in the above-described overhead ground wire induced current suppression system can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the corresponding operations of each module. For specific limitations regarding the overhead ground wire induced current suppression system, please refer to the limitations of the overhead ground wire induced current suppression method described above; both have the same function and effect, and will not be repeated here.

[0105] This invention also provides a terminal device, which includes:

[0106] Processor, memory, and bus;

[0107] The bus is used to connect the processor and the memory;

[0108] The memory is used to store operation instructions;

[0109] The processor is configured to execute the operation instructions by calling the operation instructions, thereby causing the processor to perform the operation corresponding to the overhead ground wire induced current suppression method described above.

[0110] In one alternative embodiment, a terminal device is provided, such as Figure 4 As shown, Figure 4 The terminal device 5000 shown includes a processor 5001 and a memory 5003. The processor 5001 and the memory 5003 are connected, for example, via a bus 5002. Optionally, the terminal device 5000 may also include a transceiver 5004. It should be noted that in practical applications, the transceiver 5004 is not limited to one type, and the structure of this terminal device 5000 does not constitute a limitation on the embodiments of the present invention.

[0111] Processor 5001 may be a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It may implement or execute the various exemplary logic blocks, modules, and circuits described in connection with this disclosure. Processor 5001 may also be a combination that implements computational functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

[0112] Bus 5002 may include a path for transmitting information between the aforementioned components. Bus 5002 may be a PCI bus or an EISA bus, etc. Bus 5002 can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 4 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0113] The memory 5003 may be a ROM or other type of static storage device capable of storing static information and instructions, RAM or other type of dynamic storage device capable of storing information and instructions, or it may be an EEPROM, CD-ROM or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage medium or other magnetic storage device, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto.

[0114] The memory 5003 is used to store application code that executes the present invention, and its execution is controlled by the processor 5001. The processor 5001 is used to execute the application code stored in the memory 5003 to implement the content shown in any of the foregoing method embodiments.

[0115] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for suppressing induced current in overhead ground wires.

[0116] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of the present invention can be implemented using various computer languages, such as the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0117] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, as well as combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0118] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0119] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0120] In summary, this invention provides a method, system, device, and medium for suppressing induced current in overhead ground wires. It constructs a topology model based on the target line's fundamental parameters and parametrically encodes it. Combined with real-time simulation parameters, it dynamically generates a target simulation file, ensuring a high degree of consistency between simulation results and actual operating conditions. By acquiring electromagnetic transient data and analyzing the time-domain distribution of ground wire current using power simulation software, it accurately locates over-limit sections and identifies circulating current types. Structured alarm results provide intuitive guidance for operation and maintenance. The invention introduces preset over-limit classification thresholds for severity determination and matches differentiated suppression measures, effectively improving the safety and reliability of transmission line grounding systems. This invention achieves intelligent control of induced current in ground wires through a closed-loop process of "modeling-simulation-analysis-decision making."

[0121] The various embodiments in this specification are described in a progressive manner. For directly identical or similar parts of the embodiments, refer to each other. Each embodiment focuses on its differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments. It should be noted that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0122] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A method for suppressing induced current in overhead ground wires, characterized in that, include: Obtain the basic parameters of the target route, and perform structured modeling on the basic parameters to obtain the topology model of the target route; The target line topology model is parametrically encoded to obtain an initial simulation file, and the initial simulation file is modified based on real-time simulation parameters to obtain the target simulation file; The target simulation file is run using power simulation software to obtain electromagnetic transient simulation data, and the electromagnetic transient simulation data is analyzed and calculated to obtain the time-domain distribution data of the ground wire current. The ground current time-domain distribution data and the preset current threshold are compared to obtain several over-limit sections, and the circulating current type of each over-limit section is identified to obtain the structured alarm result corresponding to the over-limit section. The degree of exceeding the limit of each of the above-mentioned over-limit sections is determined based on a preset over-limit classification threshold, and ground wire induced current suppression measures are matched to the corresponding over-limit sections according to the degree of exceeding the limit. The process of modifying the initial simulation file based on real-time simulation parameters to obtain the target simulation file includes: Receive real-time simulation parameters input by the user and map the real-time simulation parameters to the corresponding variables in the initial simulation file; The initial simulation file is parsed to obtain the storage location of the corresponding variable, and the corresponding variable is updated numerically based on the storage location to obtain the target simulation file.

2. The method for suppressing induced current in overhead ground wires according to claim 1, characterized in that, The process of obtaining the basic parameters of the target route and performing structured modeling on the basic parameters to obtain the target route topology model includes: Basic parameters are obtained by surveying and collecting data on the target route, including geometric parameters, electrical parameters, and environmental parameters; Based on the aforementioned basic parameters, an initial line topology model of the target line is constructed using power simulation software; The initial line topology model is simulated and verified to obtain the target line topology model.

3. The method for suppressing induced current in overhead ground wires according to claim 1, characterized in that, Before modifying the initial simulation file based on real-time simulation parameters to obtain the target simulation file, the method further includes: Based on the simulation requirements of overhead ground wire induced current, the variable operating parameters of the target line topology model are determined, and the storage location of the variable operating parameters is extracted from the initial simulation file. The variable operating parameters include grounding method, grounding resistance, line length, and power flow parameters.

4. The method for suppressing induced current in overhead ground wires according to claim 1, characterized in that, The process involves calling power simulation software to run the target simulation file to obtain electromagnetic transient simulation data, and then analyzing and calculating the electromagnetic transient simulation data to obtain the time-domain distribution data of the ground wire current, including: Electromagnetic transient simulation was performed on the target simulation file using ATP-EMTP software to obtain electromagnetic transient simulation data. The electromagnetic transient simulation data is used to extract the original waveform of the ground current, and the original waveform of the ground current is then analyzed in the time domain and spatially mapped to obtain the time domain distribution data of the ground current.

5. The method for suppressing induced current in overhead ground wires according to claim 1, characterized in that, The ground current time-domain distribution data includes several span currents. The process involves comparing the ground current time-domain distribution data with a preset current threshold to obtain several over-limit sections, and identifying the circulating current type for each over-limit section to obtain a structured alarm result corresponding to that over-limit section, including: By comparing the current of each specified span with the preset current threshold, several over-limit sections are obtained. Based on the proportion of ground current amplitude, the circulation type of each of the above-limit sections is identified to obtain the circulation type of the corresponding above-limit section. The circulation type includes inter-ground current and ground current. Based on the over-limit location and circulation type corresponding to each over-limit segment, a structured alarm result is generated for the corresponding over-limit segment.

6. The method for suppressing induced current in overhead ground wires according to claim 1, characterized in that, The process of determining the degree of exceedance for each exceedance segment based on a preset exceedance classification threshold, and matching ground wire induced current suppression measures for each exceedance segment according to the degree of exceedance, includes: The degree of exceeding the limit for each of the above-mentioned limit-exceeding segments is determined based on a preset limit-exceeding classification threshold, wherein the degree of exceeding the limit includes minor limit exceeding and severe limit exceeding; Based on the over-limit section where the over-limit degree is slightly over-limit, a first ground wire induced current suppression measure is matched, wherein the first ground wire induced current suppression measure includes adjusting the ground wire segmentation and installing a surge arrester; Based on the over-limit section where the over-limit degree is the severe over-limit, a second ground wire induced current suppression measure is matched, wherein the second ground wire induced current suppression measure includes modifying the grounding grid and replacing the high-resistance ground wire.

7. An overhead ground wire induced current suppression system, characterized in that, include: The topology construction module is used to obtain the basic parameters of the target line and perform structured modeling on the basic parameters to obtain the topology model of the target line. The file generation module is used to parametrically encode the target line topology model to obtain an initial simulation file, and modify the initial simulation file based on real-time simulation parameters to obtain the target simulation file; The current calculation module is used to call the power simulation software to run the target simulation file to obtain electromagnetic transient simulation data, and to perform analytical calculations on the electromagnetic transient simulation data to obtain the time-domain distribution data of the ground wire current. An alarm generation module is used to compare the ground current time-domain distribution data with a preset current threshold to obtain several over-limit sections, and to identify the circulating current type of each over-limit section to obtain a structured alarm result corresponding to the over-limit section. The suppression matching module is used to determine the degree of exceeding the limit of each of the above-limit segments based on a preset limit grading threshold, and to match the ground wire induced current suppression measures for each above-limit segment according to the degree of exceeding the limit. The process of modifying the initial simulation file based on real-time simulation parameters to obtain the target simulation file includes: Receive real-time simulation parameters input by the user and map the real-time simulation parameters to the corresponding variables in the initial simulation file; The initial simulation file is parsed to obtain the storage location of the corresponding variable, and the corresponding variable is updated numerically based on the storage location to obtain the target simulation file.

8. A terminal device, characterized in that, The method includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor, when executing the computer program, implements the overhead ground wire induced current suppression method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored computer program, wherein, when the computer program is executed, it controls the device containing the computer-readable storage medium to perform the overhead ground wire induced current suppression method as described in any one of claims 1 to 6.

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