Field-line coupling voltage calculation method and device, electronic equipment and storage medium

Abstract

The invention discloses a field-line coupling voltage calculation method and device, electronic equipment and a storage medium, and is used for solving the problems that a current field-line coupling calculation mode cannot effectively avoid discretization errors and is relatively poor in calculation stability. The method comprises the following steps: acquiring electromagnetic field observation data of a lightning channel; respectively solving scalar potential in the electrostatic field and vector potential in the magnetic field according to electromagnetic field observation data; constructing an incident electric field model according to the scalar potential and the vector potential; and according to the incident electric field model, carrying out voltage solving calculation based on the separation potential to obtain the coupling voltage on the transmission line within the influence range of the lightning channel under the lossless grounding condition. Therefore, the dependence on a high-order numerical algorithm is reduced directly through separation solution of the potential and the magnetic potential, the calculation structure can be simplified, the calculation complexity is reduced, the problem of error accumulation possibly introduced in the high-order algorithm is avoided, and higher efficiency and stability are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning electromagnetic field simulation, and in particular to a method, device, electronic device and storage medium for calculating field-line coupling voltage. Background Art

[0002] In the field of electromagnetic compatibility (EMC), the coupling effect between electromagnetic fields and transmission lines has a significant impact on the proper operation of devices and systems. Especially in high-frequency environments, electromagnetic fields can easily couple with transmission lines, introducing external voltages and currents that can affect the stability and safety of devices along the lines. Therefore, accurately and stably calculating the external voltage source in field-line coupling has become a key research topic.

[0003] Traditional field-line coupling calculation methods typically require discretizing the electric field and numerically calculating the applied voltage source. However, this discretization process introduces truncation errors, which are amplified during the numerical solution. This leads to instability in the calculated results and affects the accuracy. This problem is particularly prominent when dealing with complex electromagnetic environments.

[0004] To address this issue, current technology has gradually developed a variety of improved methods, including the use of high-order difference or interpolation algorithms to reduce truncation errors. However, these methods generally only improve numerical stability under specific conditions and cannot fundamentally eliminate the impact of truncation errors. Therefore, designing a field-line coupling calculation method that effectively avoids discretization errors and improves computational stability has become a difficult problem that the industry needs to solve. Summary of the Invention

[0005] The present invention provides a field-line coupling voltage calculation method, device, electronic device and storage medium, which are used to solve or partially solve the technical problems that the current field-line coupling calculation method cannot effectively avoid discretization errors and has poor calculation stability.

[0006] The present invention provides a method for calculating field-line coupling voltage, the method comprising:

[0007] Obtain electromagnetic field observation data of lightning channels;

[0008] According to the electromagnetic field observation data, respectively solving the scalar electric potential in the electrostatic field and the vector electric potential in the magnetic field;

[0009] constructing an incident electric field model according to the scalar electric potential and the vector electric potential;

[0010] A voltage solution calculation based on the separation potential is performed according to the incident electric field model to obtain a coupled voltage on the transmission line within the influence range of the lightning channel under lossless grounding conditions.

[0011] Optionally, the electromagnetic field observation data includes incident point position information, observation point position information, charge density, current density, and electromagnetic field delay time of the lightning channel; and solving the scalar potential in the electrostatic field and the vector potential in the magnetic field based on the electromagnetic field observation data respectively includes:

[0012] Calculating the scalar potential in the electrostatic field based on the incident point position information, the observation point position information, the charge density, and the electromagnetic field delay time, combined with the vacuum dielectric constant;

[0013] The vector potential in the magnetic field is calculated based on the incident point position information, the observation point position information, the current density, and the electromagnetic field delay time, combined with vacuum permeability.

[0014] Optionally, the calculation expression of the scalar potential is as follows:

[0015]

[0016] in, represents the scalar electric potential, This means that the electrostatic field is at time The scalar potential of represents the dielectric constant of vacuum; represents the charge density; Indicates the location information of the incident point of the lightning channel; Indicates the location information of the observation point; It represents the electromagnetic field delay time, that is, the time required for the electromagnetic field to propagate from the incident point to the observation point; represents the integrated volume.

[0017] Optionally, the calculation expression of the vector potential is as follows:

[0018]

[0019] in, represents the vector electric potential, This means that the magnetic field at time The vector potential of represents the vacuum permeability; represents the current density; Indicates the location information of the incident point of the lightning channel; Indicates the location information of the observation point; It represents the electromagnetic field delay time, that is, the time required for the electromagnetic field to propagate from the incident point to the observation point; represents the integrated volume.

[0020] Optionally, the incident electric field model constructed according to the scalar potential and the vector potential is as follows:

[0021]

[0022] in, represents the incident electric field; represents the scalar electric potential; represents the vector electric potential; Represents gradient calculation.

[0023] Optionally, performing voltage solution calculation based on the separation potential according to the incident electric field model to obtain the coupled voltage on the transmission line within the influence range of the lightning channel under lossless grounding conditions includes:

[0024] Constructing an initial transmission line equation for the transmission line within the influence range of the lightning channel under lossless grounding conditions;

[0025] According to the incident electric field model, a coupled voltage source model is constructed based on a separation potential form;

[0026] Substituting the coupled voltage source model into the initial transmission line equation and setting the boundary conditions of the transmission line to obtain a target transmission line equation;

[0027] The target transmission line equation is numerically solved to obtain a coupling voltage.

[0028] Alternatively, the coupled voltage source model constructed based on the separated potential form is as follows:

[0029]

[0030] in, represents the coupled voltage source; represents the scalar electric potential; Represents vector electric potential component in the direction of the transmission line.

[0031] The present invention also provides a field-line coupling voltage calculation device, comprising:

[0032] A data acquisition unit, used to acquire electromagnetic field observation data of the lightning channel;

[0033] A separate potential solving unit, used to solve the scalar potential in the electrostatic field and the vector potential in the magnetic field respectively according to the electromagnetic field observation data;

[0034] an incident electric field model construction unit, configured to construct an incident electric field model according to the scalar electric potential and the vector electric potential;

[0035] The voltage solution calculation unit is used to perform voltage solution calculation based on the separation potential according to the incident electric field model to obtain the coupling voltage on the transmission line within the influence range of the lightning channel under the condition of lossless grounding.

[0036] The present invention further provides an electronic device, comprising a processor and a memory:

[0037] The memory is used to store program code and transmit the program code to the processor;

[0038] The processor is configured to execute any one of the above methods for calculating the field-line coupling voltage according to instructions in the program code.

[0039] The present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium is used to store program code, and the program code is used to execute the field-line coupling voltage calculation method as described in any one of the above items.

[0040] It can be seen from the above technical solutions that the present invention has the following advantages:

[0041] A method for calculating field-line coupling voltage based on potential separation is provided. First, electromagnetic field observation data of the lightning channel is obtained. Then, based on this electromagnetic field observation data, the scalar potential in the electrostatic field and the vector potential in the magnetic field are separately calculated. This method, by directly solving the electric and magnetic potentials separately, reduces reliance on high-order numerical algorithms, simplifies the computational structure, reduces computational complexity, and avoids the error accumulation problems that may be introduced by high-order algorithms, resulting in higher efficiency and stability. An incident electric field model is then constructed based on the scalar and vector potentials. Finally, a voltage solution based on the separated potentials is performed based on the incident electric field model to obtain the coupled voltage on the transmission line within the influence range of the lightning channel under intact grounding conditions. Subsequent coupled voltage calculations are then performed based on the scalar and vector potentials obtained through potential separation, avoiding direct discretization of the electric field and reducing numerical instability caused by truncation errors. This method is particularly suitable for high-precision field-line coupling analysis and calculations in complex electromagnetic field environments, and has broad practicality and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1A flowchart of the steps of a method for calculating field-line coupling voltage;

[0044] Figure 2 Schematic diagram of the overall process of a field-line coupling voltage calculation method;

[0045] Figure 3 Schematic diagram of the distribution of scalar potential and vector potential in Example 1;

[0046] Figure 4 This is a schematic diagram comparing the results of improving the coupling voltage phase consistency in Example 2;

[0047] Figure 5 The figure is a structural block diagram of a field-line coupling voltage calculation device. DETAILED DESCRIPTION

[0048] Embodiments of the present invention provide a field-line coupling voltage calculation method, device, electronic device, and storage medium, which are used to solve or partially solve the technical problems that current field-line coupling calculation methods cannot effectively avoid discretization errors and have poor calculation stability.

[0049] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below 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 making creative work are within the scope of protection of the present invention.

[0050] As an example, the current field-line coupling calculation method mainly implements the method by numerically solving the electromagnetic coupling between the electric field and the transmission line and calculating the external voltage source. There are several traditional methods:

[0051] The first method involves discretizing the electric field. The incident electric field is first discretized in space and time, representing the continuous electric field as numerical values ​​at discrete points. This method has the advantage of facilitating numerical solutions. However, its disadvantage is the introduction of non-negligible truncation errors. Especially in scenarios where computational precision is critical, truncation errors can lead to unstable results, affecting both accuracy and reliability.

[0052] The second method is direct applied voltage source calculation. This method solves for the applied voltage source on the transmission line directly based on the discretized electric field values. However, due to discretization errors in the electric field, numerical instabilities often occur during the solution process. This error is particularly amplified in complex electromagnetic environments.

[0053] The third is to improve numerical stability. To improve numerical stability, some technical solutions have introduced high-order difference or interpolation techniques to reduce discretization errors. For example, fourth-order difference formulas are used instead of standard second-order differences to more accurately approximate electric field changes, thereby reducing truncation errors. However, these improvements can only partially alleviate the problem and still cannot fully guarantee computational stability. The reason is that the discretization error will gradually amplify during the numerical solution process. Even with improvements such as high-order difference algorithms, numerical stability is still difficult to guarantee in complex electromagnetic environments. As a result, traditional methods are difficult to effectively apply under high-frequency conditions or in ring structures. In addition, using this method for calculations often increases computational complexity, making the calculation process more time-consuming and less efficient. This affects the wide range of practical applications.

[0054] Therefore, one of the core invention points of the embodiment of the present invention is to overcome the instability caused by truncation error in traditional methods through potential separation technology, and provide an efficient, stable and reliable field-line coupling voltage calculation method under lossless grounding conditions. On the one hand, the incident electric field is decomposed into scalar potential and vector potential, which are used as independent terms to solve the external voltage source, avoiding direct discretization of the electric field to reduce the numerical instability caused by truncation error. It is particularly suitable for high-precision field-line coupling analysis and calculation in complex electromagnetic field environments, and has wider practicality and application prospects. On the other hand, by directly solving the electric potential and magnetic potential separately, the dependence on high-order numerical algorithms is reduced, the calculation structure can be simplified, the calculation complexity is reduced, and the error accumulation problem that may be introduced in high-order algorithms is avoided. It has higher efficiency and stability and is suitable for field-line coupling calculation applications under lossless ground conditions.

[0055] Reference Figure 1 , shows a flowchart of a method for calculating field-line coupling voltage provided by an embodiment of the present invention, which may specifically include the following steps:

[0056] Step 101, obtaining electromagnetic field observation data of a lightning channel;

[0057] Electromagnetic field observation data may primarily include the lightning channel's incident point location information, observation point location information, charge density, current density, and electromagnetic field delay time. Specifically, the incident point location information may be the spatial coordinates of the incident point. The observation point location information may be the spatial coordinates of the observation point.

[0058] Step 102, respectively solving the scalar electric potential in the electrostatic field and the vector electric potential in the magnetic field based on the electromagnetic field observation data;

[0059] This embodiment of the present invention decomposes the incident electric field into a scalar potential and a vector potential to calculate the applied voltage source separately. By introducing the scalar and vector components of the electromagnetic field, it is possible to avoid directly discretizing the electric field and effectively reduce truncation errors during the discretization process.

[0060] In some embodiments, the implementation process of respectively solving the scalar electric potential in the electrostatic field and the vector electric potential in the magnetic field based on electromagnetic field observation data includes the following sub-steps S01 to S02:

[0061] Step S01: Calculate the scalar potential in the electrostatic field based on the incident point position information, the observation point position information, the charge density, and the electromagnetic field delay time, combined with the vacuum dielectric constant;

[0062] Furthermore, the calculation expression of scalar potential is as follows:

[0063]

[0064] in, represents the scalar electric potential, This means that the electrostatic field is at time The scalar potential of Represents the vacuum dielectric constant, which is ; represents the charge density; Indicates the location information of the incident point of the lightning channel; Indicates the location information of the observation point; It represents the electromagnetic field delay time, that is, the time required for the electromagnetic field to propagate from the incident point (i.e. the source point) to the observation point; represents the integrated volume and represents the charge density The source area of ​​the distribution (represents the area within the influence range of the lightning channel, such as the spatial area around the lightning channel or transmission line).

[0065] Step S02: Calculate the vector potential in the magnetic field based on the incident point position information, the observation point position information, the current density, and the electromagnetic field delay time, combined with the vacuum permeability.

[0066] Furthermore, the calculation expression of the vector potential is as follows:

[0067]

[0068] in, represents the vector electric potential, This means that the magnetic field at time The vector potential of Represents the vacuum permeability, the value is ; Represents the current density.

[0069] Therefore, the embodiment of the present invention achieves a separate solution of the electromagnetic field by separately solving the vector potential, thereby avoiding the accumulation of truncation errors.

[0070] Step 103, constructing an incident electric field model according to the scalar potential and the vector potential;

[0071] This step is mainly based on scalar potential and vector potential, and the incident electric field is expressed as the sum of the two.

[0072] Specifically, the incident electric field model constructed based on scalar potential and vector potential is as follows:

[0073]

[0074] in, represents the incident electric field; represents the scalar electric potential; represents the vector electric potential; Represents gradient calculation.

[0075] Thus, by calculating the scalar potential and vector potential The gradient and derivative of are used to achieve stable calculation of the incident electric field.

[0076] Step 104 : performing voltage solution calculation based on the separation potential according to the incident electric field model to obtain the coupled voltage on the transmission line within the influence range of the lightning channel under the condition of lossless grounding.

[0077] This step is mainly based on the lossless grounding condition and uses the separation potential method to calculate the coupling voltage on the transmission line, thereby achieving high-precision field-line coupling calculation.

[0078] In some embodiments, a voltage solution calculation based on the separation potential is performed according to the incident electric field model to obtain the coupled voltage on the transmission line within the influence range of the lightning channel under the condition of intact grounding, including the following sub-steps S11 to S14:

[0079] Step S11: constructing an initial transmission line equation for the transmission line within the influence range of the lightning channel under lossless grounding conditions;

[0080] Under lossless grounding conditions, a transmission line model is first constructed for the transmission lines within the lightning channel's influence range. To distinguish this model from the actual solution performed after incorporating the coupled voltage source model in the subsequent steps, the initial transmission line model is defined as the initial transmission line equation.

[0081] Assume that the transmission line is a lossless single conductor structure and the earth is an ideal conductor (the surface conductivity is →∞). The initial transmission line equation is constructed as follows:

[0082]

[0083]

[0084] in, It is an external voltage source, generated by the coupling of the incident electromagnetic field, that is, the coupled voltage source; Indicates the length of the transmission line.

[0085] Step S12: constructing a coupled voltage source model based on the incident electric field model and the separation potential form;

[0086] Coupling voltage source The synthesis of the decomposed scalar potential and vector potential Specifically, the coupled voltage source model constructed based on the separation potential form is as follows:

[0087]

[0088] in, Represents vector electric potential component in the direction of the transmission line.

[0089] Therefore, a coupled voltage source model is constructed based on the separated potential form. By avoiding direct discretization of the electric field, the stability and accuracy of the calculation are achieved, which is particularly suitable for application scenarios without loss of the earth.

[0090] Step S13: Substitute the coupled voltage source model into the initial transmission line equation, and set the boundary conditions of the transmission line to obtain the target transmission line equation;

[0091] Specifically, you can apply short-circuit or open-circuit boundary conditions at both ends of a transmission line to set the boundary conditions of the transmission line. and .

[0092] Step S14: numerically solving the target transmission line equation to obtain the coupling voltage.

[0093] The target transmission line equation is numerically solved by FDTD (Finite-Difference Time-Domain Method) or frequency domain method (such as Fourier transform), and the coupled voltage is finally output. .

[0094] In an embodiment of the present invention, the instability caused by truncation errors in traditional methods is overcome by potential separation technology, providing an efficient, stable, and reliable method for calculating field-line coupling voltage under lossless grounding conditions. On the one hand, the incident electric field is decomposed into scalar potential and vector potential, which are used as independent terms to solve the external voltage source, avoiding direct discretization of the electric field and reducing the numerical instability caused by truncation errors. It is particularly suitable for high-precision field-line coupling analysis and calculation in complex electromagnetic field environments, and has wider practicality and application prospects. On the other hand, by directly solving the electric potential and magnetic potential separately, the dependence on high-order numerical algorithms is reduced, the calculation structure is simplified, the calculation complexity is reduced, and the error accumulation problem that may be introduced in high-order algorithms is avoided. It has higher efficiency and stability and is suitable for field-line coupling calculation applications under lossless ground conditions. Therefore, the technical solution provided by the present invention can not only reduce truncation errors and improve calculation accuracy, but also simplify the structure, improve calculation efficiency, and improve numerical stability, making it more suitable for high-frequency application scenarios.

[0095] For better explanation, refer to Figure 2 , which shows a schematic diagram of the overall flow of a method for calculating field-line coupling voltage provided by an embodiment of the present invention. It should be noted that this embodiment only briefly describes the general flow of calculating field-line coupling voltage. The specific implementation of each step can be understood by referring to the relevant content in the aforementioned embodiments and will not be elaborated here. It should be understood that the present invention is not limited to this.

[0096] Step 201: Obtaining incident point location information, observation point location information, charge density, current density, and electromagnetic field delay time of a lightning channel;

[0097] Step 202: Calculate the scalar potential in the electrostatic field based on the incident point position information, the observation point position information, the charge density, and the electromagnetic field delay time, combined with the vacuum dielectric constant;

[0098] Step 203: Calculate the vector potential in the magnetic field based on the incident point position information, the observation point position information, the current density, and the electromagnetic field delay time, combined with the vacuum permeability;

[0099] Step 204: constructing an incident electric field model based on the scalar potential and the vector potential, and constructing a coupled voltage source model based on the incident electric field model and the separated potential form;

[0100] Step 205: construct an initial transmission line equation for the transmission line within the lightning channel influence range under the condition of intact grounding, substitute the coupled voltage source model into the initial transmission line equation, and set the boundary conditions of the transmission line to obtain the target transmission line equation;

[0101] Step 206: numerically solve the target transmission line equation to obtain the coupling voltage on the transmission line within the influence range of the lightning channel under the condition of intact grounding.

[0102] In order to enable those skilled in the art to better understand the technical solution of the present invention, the embodiments of the present invention are briefly described below through two specific examples.

[0103] Example 1: Field-line coupling calculation under LEMP (Lightning Electromagnetic Pulse)

[0104] Set the vertical height of the lightning channel ; Current peak ; Rise time (i.e. electromagnetic field delay time) ; Transmission line length ; Height from the ground ; Lossless earth condition. For example, the scalar potential and vector potential The distribution of Figure 3 shown.

[0105] After testing, the coupling voltage peak The waveform rise time is consistent with the lightning current. The calculation results are stable (error <1%).

[0106] Compared with the traditional method, the comparison results are shown in Table 1 below:

[0107] Table 1: Comparison results of relevant indicators

[0108]

[0109] Example 2: Coupled interference from high-frequency communication signals (1 GHz)

[0110] Set the high-frequency signal source power ; Transmission line length ;Adopts a ring structure.

[0111] For example, the coupling voltage phase consistency improvement result is compared with Figure 4 shown. Figure 4 In the example, Jefi represents the method provided by the present invention. The other three Uman represent traditional methods. dt represents different discrete time intervals. It can be seen that the method provided by the present invention does not exhibit numerical divergence in the ring structure. In contrast, the error of the traditional method increases to 20% after 100 iterations.

[0112] Reference Figure 5 , shows a structural block diagram of a field-line coupling voltage calculation device provided by an embodiment of the present invention, which may specifically include:

[0113] The data acquisition unit 501 is used to acquire electromagnetic field observation data of the lightning channel;

[0114] A separate potential solving unit 502 is used to solve the scalar potential in the electrostatic field and the vector potential in the magnetic field respectively according to the electromagnetic field observation data;

[0115] An incident electric field model construction unit 503 is configured to construct an incident electric field model according to the scalar electric potential and the vector electric potential;

[0116] The voltage solution calculation unit 504 is configured to perform a voltage solution calculation based on the separation potential according to the incident electric field model, and obtain a coupled voltage on the transmission line within the influence range of the lightning channel under the condition of lossless grounding.

[0117] In an optional embodiment, the electromagnetic field observation data includes incident point position information, observation point position information, charge density, current density, and electromagnetic field delay time of the lightning channel; the separation potential solving unit 502 includes:

[0118] a scalar potential solving subunit, configured to calculate the scalar potential in the electrostatic field based on the incident point position information, the observation point position information, the charge density, and the electromagnetic field delay time, in combination with the vacuum dielectric constant;

[0119] The vector potential solving subunit is used to calculate the vector potential in the magnetic field according to the incident point position information, the observation point position information, the current density and the electromagnetic field delay time, and in combination with the vacuum permeability.

[0120] In an optional embodiment, the calculation expression of the scalar potential is as follows:

[0121]

[0122] in, represents the scalar electric potential, This means that the electrostatic field is at time The scalar potential of represents the dielectric constant of vacuum; represents the charge density; Indicates the location information of the incident point of the lightning channel; Indicates the location information of the observation point; It represents the electromagnetic field delay time, that is, the time required for the electromagnetic field to propagate from the incident point to the observation point; represents the integrated volume.

[0123] In an optional embodiment, the calculation expression of the vector potential is as follows:

[0124]

[0125] in, represents the vector electric potential, This means that the magnetic field at time The vector potential of represents the vacuum permeability; represents the current density; Indicates the location information of the incident point of the lightning channel; Indicates the location information of the observation point; It represents the electromagnetic field delay time, that is, the time required for the electromagnetic field to propagate from the incident point to the observation point; represents the integrated volume.

[0126] In an optional embodiment, the incident electric field model constructed according to the scalar potential and the vector potential is as follows:

[0127]

[0128] in, represents the incident electric field; represents the scalar electric potential; represents the vector electric potential; Represents gradient calculation.

[0129] In an optional embodiment, the voltage solution calculation unit 504 includes:

[0130] An initial transmission line equation construction unit, used to construct an initial transmission line equation for the transmission line within the influence range of the lightning channel under lossless grounding conditions;

[0131] A coupled voltage source model construction unit, configured to construct a coupled voltage source model based on the incident electric field model and the separation potential form;

[0132] a target transmission line equation obtaining unit, configured to substitute the coupled voltage source model into the initial transmission line equation and set boundary conditions of the transmission line to obtain a target transmission line equation;

[0133] The numerical solution unit is used to numerically solve the target transmission line equation to obtain the coupling voltage.

[0134] In an optional embodiment, the coupled voltage source model constructed based on the separation potential form is as follows:

[0135]

[0136] in, represents the coupled voltage source; represents the scalar electric potential; Represents vector electric potential component in the direction of the transmission line.

[0137] As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the aforementioned method embodiment.

[0138] An embodiment of the present invention further provides an electronic device, the device including a processor and a memory:

[0139] The memory is used to store program codes and transmit the program codes to the processor;

[0140] The processor is configured to execute the field-line coupling voltage calculation method of any embodiment of the present invention according to instructions in the program code.

[0141] An embodiment of the present invention further provides a computer-readable storage medium, which is used to store program code, and the program code is used to execute the field-line coupling voltage calculation method of any embodiment of the present invention.

[0142] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0143] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0144] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0145] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0146] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0147] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for calculating field-line coupling voltage, characterized in that: include: Obtain electromagnetic field observation data of lightning channels; According to the electromagnetic field observation data, respectively solving the scalar electric potential in the electrostatic field and the vector electric potential in the magnetic field; constructing an incident electric field model according to the scalar electric potential and the vector electric potential; A voltage solution calculation based on the separation potential is performed according to the incident electric field model to obtain a coupled voltage on the transmission line within the influence range of the lightning channel under lossless grounding conditions.

2. The method for calculating the field-line coupling voltage according to claim 1, wherein: The electromagnetic field observation data includes the incident point position information, observation point position information, charge density, current density and electromagnetic field delay time of the lightning channel; and solving the scalar potential in the electrostatic field and the vector potential in the magnetic field based on the electromagnetic field observation data, respectively, including: Calculating the scalar potential in the electrostatic field based on the incident point position information, the observation point position information, the charge density, and the electromagnetic field delay time, combined with the vacuum dielectric constant; The vector potential in the magnetic field is calculated based on the incident point position information, the observation point position information, the current density, and the electromagnetic field delay time, combined with vacuum magnetic permeability.

3. The method for calculating the field-line coupling voltage according to claim 2, wherein: The calculation expression of the scalar potential is as follows: in, represents the scalar electric potential, This means that the electrostatic field is at time The scalar potential of represents the dielectric constant of vacuum; represents the charge density; Indicates the location information of the incident point of the lightning channel; Indicates the location information of the observation point; It represents the electromagnetic field delay time, that is, the time required for the electromagnetic field to propagate from the incident point to the observation point; represents the integrated volume.

4. The method for calculating the field-line coupling voltage according to claim 2, wherein: The calculation expression of the vector potential is as follows: in, represents the vector electric potential, This means that the magnetic field at time The vector potential of represents the vacuum permeability; represents the current density; Indicates the location information of the incident point of the lightning channel; Indicates the location information of the observation point; It represents the electromagnetic field delay time, that is, the time required for the electromagnetic field to propagate from the incident point to the observation point; represents the integrated volume.

5. The method for calculating the field-line coupling voltage according to claim 2, wherein: The incident electric field model constructed according to the scalar potential and the vector potential is as follows: in, represents the incident electric field; represents the scalar electric potential; represents the vector electric potential; Represents gradient calculation.

6. The method for calculating the field-line coupling voltage according to any one of claims 1 to 5, characterized in that: The performing voltage solution calculation based on the separation potential according to the incident electric field model to obtain the coupled voltage on the transmission line within the influence range of the lightning channel under the condition of lossless grounding includes: Constructing an initial transmission line equation for the transmission line within the influence range of the lightning channel under lossless grounding conditions; According to the incident electric field model, a coupled voltage source model is constructed based on a separation potential form; Substituting the coupled voltage source model into the initial transmission line equation and setting the boundary conditions of the transmission line to obtain a target transmission line equation; The target transmission line equation is numerically solved to obtain a coupling voltage.

7. The method for calculating the field-line coupling voltage according to claim 6, wherein: The coupled voltage source model constructed based on the separated potential form is as follows: in, represents the coupled voltage source; represents the scalar electric potential; Represents vector electric potential Component in the direction of the transmission line.

8. A field-line coupling voltage calculation device, characterized in that: include: A data acquisition unit, used to acquire electromagnetic field observation data of the lightning channel; A separate potential solving unit, used to solve the scalar potential in the electrostatic field and the vector potential in the magnetic field respectively according to the electromagnetic field observation data; an incident electric field model construction unit, configured to construct an incident electric field model according to the scalar electric potential and the vector electric potential; The voltage source solution calculation unit is used to perform a voltage source solution calculation based on the separation potential according to the incident electric field model to obtain the coupling voltage on the transmission line within the influence range of the lightning channel under the condition of lossless grounding.

9. An electronic device, characterized in that: The device includes a processor and a memory: The memory is used to store program code and transmit the program code to the processor; The processor is configured to execute the field-line coupling voltage calculation method according to any one of claims 1 to 7 according to instructions in the program code.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium is used to store program codes, and the program codes are used to execute the field-line coupling voltage calculation method according to any one of claims 1 to 7.

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