Field-line coupling voltage calculation method and device based on surface loss correction

Abstract

The invention discloses a field-line coupling voltage calculation method and a field-line coupling voltage calculation device based on earth surface loss correction, which are used for solving the technical problems of large calculation deviation, low calculation efficiency and limited adaptability in the current field-line coupling voltage calculation. The method comprises the following steps: acquiring incident electric field data of a lightning channel, and calculating an initial electric field component under the condition of lossless earth surface according to the incident electric field data; performing electric field correction on the initial electric field component to obtain a corrected horizontal electric field component; and calculating a coupling voltage source on the transmission line within the influence range of the lightning channel according to the corrected horizontal electric field component. Therefore, under the condition of simple calculation, through direct calculation of the electric field correction formula, the complex grid division requirement in a traditional calculation method is avoided, the calculation complexity is reduced, the calculation efficiency is improved, and better adaptability is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning electromagnetic field simulation, and in particular to a field-line coupling voltage calculation method based on surface loss correction, a field-line coupling voltage calculation device based on surface loss correction, an electronic device, and a storage medium. Background Art

[0002] LEMP (Lightning Electromagnetic Pulse) generates a strong transient electromagnetic field near the Earth's surface. The field strength decays with distance, and its propagation characteristics are significantly affected by the Earth's surface conductivity.

[0003] Currently, the most commonly used field-line coupling calculation methods are numerical simulations based on the finite-difference time-domain method (FDTD) and the finite element method (FEM). These methods discretize space and time to solve for electromagnetic field components. However, due to the extensive discretization of electric and magnetic fields required in practical calculations, discretization errors are significant. These errors can lead to significant deviations in the calculation results and poor numerical stability, especially when considering surface losses. Furthermore, the FDTD and FEM methods require meshing of the entire computational domain. When surface losses are high or the coupling structure is complex, computational efficiency decreases significantly, resulting in a long computational time and limited applicability in practical applications. Summary of the Invention

[0004] The present invention provides a field-line coupling voltage calculation method based on surface loss correction, a field-line coupling voltage calculation device based on surface loss correction, an electronic device and a storage medium, which are used to solve or partially solve the technical problems of large calculation deviation, low calculation efficiency and limited adaptability in the current field-line coupling voltage calculation.

[0005] The present invention provides a method for calculating field-line coupling voltage based on surface loss correction, comprising:

[0006] Obtaining incident electric field data of the lightning channel, and calculating the initial electric field component under an intact surface condition based on the incident electric field data;

[0007] performing electric field correction on the initial electric field component to obtain a corrected horizontal electric field component;

[0008] The coupled voltage source on the transmission line within the influence range of the lightning channel is calculated according to the corrected horizontal electric field component.

[0009] Optionally, performing electric field correction on the initial electric field component to obtain a corrected horizontal electric field component includes:

[0010] obtaining horizontal magnetic field components under lossy surface conditions, and calculating electric field component correction items based on the horizontal magnetic field components;

[0011] The electric field component correction item is used to perform electric field correction on the initial electric field component to obtain a corrected horizontal electric field component.

[0012] Optionally, calculating the electric field component correction term according to the horizontal magnetic field component includes:

[0013] Based on the horizontal magnetic field component, combined with vacuum magnetic permeability, surface electrical conductivity and vacuum dielectric constant, an electric field component correction term is calculated.

[0014] Optionally, the calculation formula of the electric field component correction term is as follows:

[0015]

[0016] in, represents the electric field component correction term; represents the vacuum permeability; represents the surface conductivity; represents the dielectric constant of vacuum; Represents the horizontal magnetic field component under lossy surface conditions.

[0017] Optionally, performing electric field correction on the initial electric field component using the electric field component correction item to obtain a corrected horizontal electric field component includes:

[0018] The initial electric field component is added to the electric field component correction term to obtain the corrected horizontal electric field component. The calculation formula is as follows:

[0019]

[0020] in, represents the horizontal electric field component after correction; represents the initial electric field component; represents the electric field component correction term.

[0021] Optionally, calculating the coupled voltage source on the transmission line within the influence range of the lightning channel according to the corrected horizontal electric field component includes:

[0022] The corrected horizontal electric field component is used as input and combined with the PEEC equation in the field-line coupling model to calculate the coupled voltage source on the transmission line within the influence range of the lightning channel.

[0023] The present invention also provides a field-line coupling voltage calculation device based on surface loss correction, comprising:

[0024] an initial electric field component calculation unit, configured to obtain incident electric field data of a lightning channel and calculate initial electric field components under an intact surface condition based on the incident electric field data;

[0025] an electric field correction unit, configured to perform electric field correction on the initial electric field component to obtain a corrected horizontal electric field component;

[0026] A coupling voltage source calculation unit is used to calculate the coupling voltage source on the transmission line within the influence range of the lightning channel according to the corrected horizontal electric field component.

[0027] Optionally, the electric field correction unit includes:

[0028] an electric field component correction term calculation unit, configured to obtain a horizontal magnetic field component under lossy surface conditions and calculate an electric field component correction term based on the horizontal magnetic field component;

[0029] The corrected horizontal electric field component calculation unit is used to use the electric field component correction item to perform electric field correction on the initial electric field component to obtain a corrected horizontal electric field component.

[0030] Optionally, the electric field component correction term calculation unit is specifically used to:

[0031] Based on the horizontal magnetic field component, combined with vacuum magnetic permeability, surface electrical conductivity and vacuum dielectric constant, an electric field component correction term is calculated.

[0032] Optionally, the calculation formula of the electric field component correction term is as follows:

[0033]

[0034] in, represents the electric field component correction term; represents the vacuum permeability; represents the surface electrical conductivity; represents the dielectric constant of vacuum; Represents the horizontal magnetic field component under lossy surface conditions.

[0035] Optionally, the corrected horizontal electric field component calculation unit is specifically configured to:

[0036] The initial electric field component is added to the electric field component correction term to obtain the corrected horizontal electric field component. The calculation formula is as follows:

[0037]

[0038] in, represents the horizontal electric field component after correction; represents the initial electric field component; represents the electric field component correction term.

[0039] Optionally, the coupling voltage source calculation unit is specifically configured to:

[0040] The corrected horizontal electric field component is used as input and combined with the PEEC equation in the field-line coupling model to calculate the coupled voltage source on the transmission line within the influence range of the lightning channel.

[0041] The present invention further provides an electronic device, comprising a processor and a memory:

[0042] The memory is used to store program code and transmit the program code to the processor;

[0043] The processor is configured to execute any one of the above methods for calculating field-line coupling voltage based on surface loss correction according to instructions in the program code.

[0044] The present invention also 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 based on surface loss correction as described in any one of the above items.

[0045] It can be seen from the above technical solutions that the present invention has the following advantages:

[0046] This paper provides a method for calculating field-line coupled voltage based on surface loss correction. First, the incident electric field data of the lightning channel is obtained. Based on this data, the initial electric field components are calculated for a lossless surface. Then, electric field correction is performed on the initial electric field components to obtain the corrected horizontal electric field components. Finally, based on the corrected horizontal electric field components, the coupled voltage source on the transmission line within the lightning channel's influence range is calculated. This method, in a simple calculation scenario, avoids the complex meshing required in traditional calculation methods through direct calculation using the electric field correction formula, reducing computational complexity, improving efficiency, and achieving greater adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] 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.

[0048] Figure 1A flowchart of a method for calculating field-line coupling voltage based on surface loss correction is provided;

[0049] Figure 2 The figure is a schematic diagram of the overall process of a field-line coupling voltage calculation method based on surface loss correction;

[0050] Figure 3 The structure block diagram of a field-line coupling voltage calculation device based on surface loss correction. DETAILED DESCRIPTION

[0051] Embodiments of the present invention provide a field-line coupling voltage calculation method based on surface loss correction, a field-line coupling voltage calculation device based on surface loss correction, an electronic device, and a storage medium, which are used to solve or partially solve the technical problems of large calculation deviation, low calculation efficiency, and limited adaptability in the current field-line coupling voltage calculation.

[0052] 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.

[0053] As an example, the most commonly used field-line coupling calculation methods are numerical simulation methods based on FDTD and FEM. These methods solve for electromagnetic field components by discretizing space and time. However, due to the need for extensive discretization of the electric and magnetic fields in actual calculations, discretization errors are relatively significant. Especially when considering surface losses, these errors can lead to large deviations in the calculation results and poor numerical stability. In addition, FDTD and FEM methods require meshing of the entire calculation domain. When surface losses are high or the coupling structure is complex, the calculation efficiency will drop significantly, making it time-consuming in practical applications and limiting its applicability.

[0054] Specifically, the FDTD method is a numerical method that performs discrete solutions in the time and space domains and is widely used in field-line coupling calculations. This method iteratively solves Maxwell's equations, calculating the electromagnetic field point by point with a time step. However, in the simulation of field components on lossy surfaces, its accuracy and stability are susceptible to the spatial grid size and time step. Furthermore, higher surface conductivity requires a correspondingly finer grid and smaller time step, significantly increasing the computational burden.

[0055] The FEM simulation method, based on differential equations within a region, solves field components in blocks, making it suitable for electromagnetic field simulation of complex structures. While FEM offers considerable flexibility in analyzing field components of lossy surfaces, it requires significant computational resources. Especially when surface losses are significant, improving computational accuracy requires extensive mesh refinement and higher-order differential calculations. This results in high computational cost and low efficiency for FEM in processing strong transient pulses, such as lightning channels.

[0056] In other words, although simulation methods based on FDTD and FEM have been widely used in traditional field-line coupling calculations, they have obvious shortcomings when dealing with surface conductivity. Their main drawbacks include:

[0057] High computational cost: FDTD and FEM require the use of finer grids and time steps when the surface conductivity is high, which significantly increases the computational time and resource consumption and is not suitable for large-scale calculations.

[0058] Limited applicability: These two methods require complex debugging and optimization in the field-line coupling calculations on lossy surfaces, making them difficult to be effectively applied in a wider range of practical scenarios.

[0059] Inefficient computation: Traditional field-line coupled computational methods based on FDTD and FEM require a fine mesh across the entire computational domain. Especially under lossy surface conditions, to maximize computational accuracy, a finer mesh and smaller time steps must be used. This significantly increases the computational workload, resulting in low efficiency and long computation times, making it unsuitable for large-scale, fast-response applications.

[0060] Limited Accuracy: Under lossy surface conditions, the numerical discretization process of FDTD and FEM methods produces truncation and discretization errors, which affect computational accuracy. Especially when the surface conductivity is high, traditional methods struggle to accurately describe the attenuation and distortion characteristics of the electric and magnetic field components, causing simulation results to deviate from reality and fail to meet high-precision requirements.

[0061] Implementation is complex and costly: To improve the accuracy of field components under lossy surface conditions, FDTD and FEM methods often require complex debugging and optimization, such as the use of high-order differences or adaptive meshing. This not only increases computational complexity but also implementation costs. Furthermore, the use of high-order algorithms can lead to excessive system resource utilization, thus affecting the overall stability of the computing system.

[0062] Furthermore, while the ideal lossless surface assumption simplifies calculations in transmission line coupling analysis, it fails to reflect actual surface conditions. In particular, when accurately solving for transient electromagnetic field components near lightning channels, phenomena such as attenuation, reflection, and distortion of horizontal electric field components are difficult to accurately represent in simulations if surface losses are not considered.

[0063] Therefore, how to accurately consider the correction term of the lossy surface in the calculation of electromagnetic field and transmission line coupling to improve the authenticity of the simulation results of electromagnetic field propagation characteristics is a technical problem that needs to be solved urgently.

[0064] Therefore, one of the core inventive aspects of the present invention is to address the issues of low accuracy and efficiency in field-line coupling calculations under lossy surface conditions by providing a field-line coupling voltage calculation method based on the Cooray-Rubinstein formula (hereinafter referred to as the CR formula) for surface loss electric field correction. By introducing the CR formula, the horizontal electric field component is expressed as the sum of the lossless surface electric field and a surface loss correction term. Using a direct correction formula rather than traditional simulation methods avoids the complex meshing requirements of the entire computational domain required by FDTD and FEM methods, significantly improving computational efficiency and making it suitable for fast-response field-line coupling applications. It excels in responding to transient events such as lightning electromagnetic pulses. Furthermore, by using the correction term to accurately reflect the impact of the lossy surface on the electric field components, discretization and truncation errors are reduced, improving computational accuracy, and making the calculation of the electric field and coupling voltage more accurate. This effectively addresses the computational bias issues currently encountered in highly conductive surface scenarios. In addition, since the technical solution provided by the present invention does not need to rely on complex high-order differences or adaptive grids, by simplifying the field component solution process, it can not only reduce the computational complexity, but also reduce system resource usage and implementation costs, making it easier to apply to electromagnetic field and transmission line coupling calculation scenarios that require simple and efficient processing, greatly expanding the application scope of field-line coupling analysis and enhancing applicability.

[0065] Reference Figure 1 , shows a flowchart of a method for calculating field-line coupling voltage based on surface loss correction provided by an embodiment of the present invention, which may specifically include the following steps:

[0066] Step 101: Obtain incident electric field data of a lightning channel, and calculate initial electric field components under an intact surface condition based on the incident electric field data;

[0067] The first step is to calculate the lossless surface electric field. In the specific implementation, the incident electric field data of the lightning channel can be input, and the ideal electric field component of the lossless surface can be preliminarily calculated assuming the lossless surface condition, which is recorded as the initial electric field component. .

[0068] Step 102, performing electric field correction on the initial electric field component to obtain a corrected horizontal electric field component;

[0069] In some embodiments, the process of performing electric field correction on the initial electric field component to obtain the corrected horizontal electric field component can be implemented by executing the following sub-steps S01 to S02:

[0070] Step S01: obtaining horizontal magnetic field components under lossy surface conditions, and calculating electric field component correction items based on the horizontal magnetic field components;

[0071] In the embodiment of the present invention, the electric field component correction term is calculated based on the CR formula to reflect the influence of the surface conductivity on the electric field.

[0072] Furthermore, the electric field component correction term is calculated according to the horizontal magnetic field component. Specifically, the electric field component correction term is calculated based on the horizontal magnetic field component in combination with vacuum permeability, surface conductivity and vacuum dielectric constant.

[0073] The calculation formula for the electric field component correction term is as follows:

[0074]

[0075] in, represents the electric field component correction term; represents the vacuum permeability; represents the surface electrical conductivity; represents the dielectric constant of vacuum; Represents the horizontal magnetic field component under lossy surface conditions.

[0076] Current research has verified through experimental data that the horizontal magnetic field component plays a dominant role in the correction of the lossy surface electric field, and the vertical component can be ignored. Surface conductivity directly related to the horizontal magnetic field component Under lossy surface conditions, induced currents can have a significant impact. Furthermore, the vertical component of the lightning electromagnetic field decays rapidly near the surface, making its contribution to far-field coupling negligible. Therefore, the present embodiment does not consider the influence of the vertical component when determining the electric field correction term.

[0077] Based on the surface conductivity and the horizontal magnetic field component, the correction term for surface loss is calculated to reflect the attenuation and distortion effects of the earth's conductivity on the electric field.

[0078] Step S02: performing electric field correction on the initial electric field component using the electric field component correction item to obtain a corrected horizontal electric field component.

[0079] Furthermore, the electric field component correction term is used to perform electric field correction on the initial electric field component to obtain the corrected horizontal electric field component. Specifically, the initial electric field component and the electric field component correction term are added to obtain the corrected horizontal electric field component. The calculation formula is as follows:

[0080]

[0081] in, represents the horizontal electric field component after correction; represents the initial electric field component; represents the electric field component correction term.

[0082] In order to prove the feasibility of the electric field correction method provided by the embodiment of the present invention, the rationality of the linear superposition adopted above is briefly explained.

[0083] First, linear superposition is used The reason: From a theoretical perspective, the CR formula, as a linear correction model, assumes that the surface loss effect and the lossless field component are independent and superimposable. From an engineering perspective, the linear model is computationally efficient and more suitable for real-time simulation of transient electromagnetic pulses.

[0084] The second step is to demonstrate the feasibility of other correction methods. Take the weighted superposition and frequency domain correction as shown below as an example:

[0085] Weighted overlay: If the surface conductivity varies with depth, a weight function can be introduced . Then we can conclude However, in practical applications, experimental calibration is required. .

[0086] Frequency domain correction: Convolution correction is used in the frequency domain (such as ,in, However, this method requires additional Fourier transform, which in turn increases the amount of calculation.

[0087] Conclusion: The linear superposition method used in this embodiment of the present invention is currently the optimal solution. Other methods require additional parameters or calculation steps, which may offset the efficiency advantage and affect the real-time performance and computational cost of the calculation.

[0088] The CR formula is thus introduced. By adding a surface loss correction term to the lossless electric field, the electric field can be corrected for lossy surface conditions. In simple calculations, direct calculation using the correction formula avoids the need for complex meshing, reducing computational complexity and improving efficiency.

[0089] Step 103: Calculate the coupled voltage source on the transmission line within the influence range of the lightning channel according to the corrected horizontal electric field component.

[0090] In some embodiments, the coupled voltage source on the transmission line within the lightning channel influence range is calculated based on the corrected horizontal electric field component. Specifically, the corrected horizontal electric field component is converted to As input, combined with the PEEC (Partial Element Equivalent Circuit) equation in the field-line coupling model, the coupled voltage source on the transmission line within the influence range of the lightning channel (for example, near the lightning channel) is calculated.

[0091] In an embodiment of the present invention, a method for calculating field-line coupling voltages based on the CR formula for surface loss electric field correction is provided. By introducing the CR formula, the horizontal electric field component is expressed as the sum of the lossless surface electric field and the surface loss correction term. Using a direct correction formula rather than traditional simulation methods avoids the complex meshing requirements of the FDTD and FEM methods for the entire computational domain, significantly improving computational efficiency and making it suitable for fast-response field-line coupling applications. It performs particularly well in transient events such as lightning electromagnetic pulses. Furthermore, by accurately reflecting the impact of the lossy surface on the electric field components through the correction term, discretization and truncation errors are reduced, improving computational accuracy and making the calculation of the electric field and coupled voltage more accurate. This effectively improves the computational deviation problem of current technologies in highly conductive surface scenarios. Furthermore, because the technical solution provided by the present invention does not rely on complex high-order differences or adaptive meshes, by simplifying the field component solution process, it not only reduces computational complexity but also reduces system resource usage and implementation costs. This makes it easier to apply to electromagnetic field and transmission line coupling calculation scenarios that require simple and efficient processing, greatly expanding the application scope of field-line coupling analysis and enhancing its applicability. Therefore, by adopting the technical solution provided by the present invention, not only can the calculation accuracy be improved and the loss of calculation resources be reduced, but also the calculation efficiency can be improved and the applicability can be enhanced.

[0092] For better explanation, refer to Figure 2 , showing a schematic diagram of the overall flow of a method for calculating field-line coupling voltage based on surface loss correction, 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 based on surface loss correction. 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 is understood that the present invention is not limited to this.

[0093] Step 201: Acquire incident electric field data of a lightning channel and horizontal magnetic field components under lossy surface conditions;

[0094] Step 202: Calculate the initial electric field components under the condition of no damage to the surface based on the incident electric field data;

[0095] Step 203: Calculate the electric field component correction term based on the horizontal magnetic field component and in combination with vacuum magnetic permeability, surface electrical conductivity, and vacuum dielectric constant;

[0096] Step 204: Add the initial electric field component and the electric field component correction term to obtain a corrected horizontal electric field component;

[0097] Step 205: Using the corrected horizontal electric field component as input and combining it with the PEEC equation in the field-line coupling model, calculate the coupled voltage source on the transmission line within the influence range of the lightning channel.

[0098] In order to enable those skilled in the art to better understand the technical solution of the present invention, an embodiment of the present invention is described below through a specific example.

[0099] Scenario setting: peak lightning return current is 30 kA; surface conductivity 0.01S / m; transmission line height 1 m; distance from lightning strike point 100 m.

[0100] S1: Lossless electric field calculation

[0101] Using the ideal conductor surface assumption, the transmission line equation is used to calculate .

[0102] S2: Correction Term Calculation

[0103] Through FDTD simulation, it can be concluded that , substitute into the formula have to .

[0104] S3: Electric field after correction

[0105] .

[0106] S4: coupled voltage output

[0107] The transmission line coupling voltage (i.e. induced voltage) is calculated using the PEEC model. .

[0108] The comparison results of the field-line coupling voltage calculation using the method provided by the present invention and the existing FDTD method are shown in Table 1 below:

[0109] Table 1: Comparison of calculation results of the two methods

[0110]

[0111] As shown in Table 1, compared to the FDTD method, the method provided in this embodiment of the present invention improves computational efficiency by 240 times, reduces memory usage by 99.3%, and reduces error by 76%. This fully demonstrates the feasibility and effectiveness of the technical solution provided in this embodiment of the present invention.

[0112] Reference Figure 3 , shows a structural block diagram of a field-line coupling voltage calculation device based on surface loss correction provided by an embodiment of the present invention, which may specifically include:

[0113] The initial electric field component calculation unit 301 is used to obtain incident electric field data of the lightning channel and calculate the initial electric field component under the condition of intact surface based on the incident electric field data;

[0114] An electric field correction unit 302 is configured to perform electric field correction on the initial electric field component to obtain a corrected horizontal electric field component;

[0115] The coupling voltage source calculation unit 303 is configured to calculate the coupling voltage source on the transmission line within the influence range of the lightning channel according to the corrected horizontal electric field component.

[0116] In an optional embodiment, the electric field correction unit 302 includes:

[0117] an electric field component correction term calculation unit, configured to obtain a horizontal magnetic field component under lossy surface conditions and calculate an electric field component correction term based on the horizontal magnetic field component;

[0118] The corrected horizontal electric field component calculation unit is used to use the electric field component correction item to perform electric field correction on the initial electric field component to obtain a corrected horizontal electric field component.

[0119] In an optional embodiment, the electric field component correction term calculation unit is specifically configured to:

[0120] Based on the horizontal magnetic field component, combined with vacuum magnetic permeability, surface electrical conductivity and vacuum dielectric constant, an electric field component correction term is calculated.

[0121] In an optional embodiment, the calculation formula of the electric field component correction term is as follows:

[0122]

[0123] in, represents the electric field component correction term; represents the vacuum permeability; represents the surface electrical conductivity; represents the dielectric constant of vacuum; Represents the horizontal magnetic field component under lossy surface conditions.

[0124] In an optional embodiment, the corrected horizontal electric field component calculation unit is specifically configured to:

[0125] The initial electric field component is added to the electric field component correction term to obtain the corrected horizontal electric field component. The calculation formula is as follows:

[0126]

[0127] in, represents the horizontal electric field component after correction; represents the initial electric field component; represents the electric field component correction term.

[0128] In an optional embodiment, the coupling voltage source calculation unit 303 is specifically configured to:

[0129] The corrected horizontal electric field component is used as input and combined with the PEEC equation in the field-line coupling model to calculate the coupled voltage source on the transmission line within the influence range of the lightning channel.

[0130] 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.

[0131] An embodiment of the present invention further provides an electronic device, the device including a processor and a memory:

[0132] The memory is used to store program codes and transmit the program codes to the processor;

[0133] The processor is configured to execute the field-line coupling voltage calculation method based on surface loss correction according to any embodiment of the present invention according to the instructions in the program code.

[0134] An embodiment of the present invention further provides a computer-readable storage medium for storing program code, and the program code is used to execute the field-line coupling voltage calculation method based on surface loss correction according to any embodiment of the present invention.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] 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.

[0140] 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 based on surface loss correction, characterized in that: include: Obtaining incident electric field data of the lightning channel, and calculating the initial electric field component under an intact surface condition based on the incident electric field data; performing electric field correction on the initial electric field component to obtain a corrected horizontal electric field component; The coupled voltage source on the transmission line within the influence range of the lightning channel is calculated according to the corrected horizontal electric field component.

2. The method for calculating field-line coupling voltage based on surface loss correction according to claim 1, characterized in that: The performing electric field correction on the initial electric field component to obtain a corrected horizontal electric field component includes: obtaining horizontal magnetic field components under lossy surface conditions, and calculating electric field component correction items based on the horizontal magnetic field components; The electric field component correction item is used to perform electric field correction on the initial electric field component to obtain a corrected horizontal electric field component.

3. The method for calculating field-line coupling voltage based on surface loss correction according to claim 2, characterized in that: The calculating the electric field component correction term according to the horizontal magnetic field component includes: Based on the horizontal magnetic field component, combined with vacuum magnetic permeability, surface electrical conductivity and vacuum dielectric constant, an electric field component correction term is calculated.

4. The method for calculating field-line coupling voltage based on surface loss correction according to claim 3, characterized in that: The calculation formula of the electric field component correction term is as follows: in, represents the electric field component correction term; represents the vacuum permeability; represents the surface electrical conductivity; represents the dielectric constant of vacuum; Represents the horizontal magnetic field component under lossy surface conditions.

5. The method for calculating field-line coupling voltage based on surface loss correction according to claim 2, characterized in that: The step of performing electric field correction on the initial electric field component by using the electric field component correction item to obtain a corrected horizontal electric field component includes: The initial electric field component is added to the electric field component correction term to obtain the corrected horizontal electric field component. The calculation formula is as follows: in, represents the horizontal electric field component after correction; represents the initial electric field component; represents the electric field component correction term.

6. The method for calculating field-line coupling voltage based on surface loss correction according to any one of claims 1 to 5, characterized in that: Calculating the coupled voltage source on the transmission line within the influence range of the lightning channel according to the corrected horizontal electric field component includes: The corrected horizontal electric field component is used as input and combined with the PEEC equation in the field-line coupling model to calculate the coupled voltage source on the transmission line within the influence range of the lightning channel.

7. A field-line coupling voltage calculation device based on surface loss correction, characterized in that: include: an initial electric field component calculation unit, configured to obtain incident electric field data of a lightning channel and calculate initial electric field components under an intact surface condition based on the incident electric field data; an electric field correction unit, configured to perform electric field correction on the initial electric field component to obtain a corrected horizontal electric field component; A coupling voltage source calculation unit is used to calculate the coupling voltage source on the transmission line within the influence range of the lightning channel according to the corrected horizontal electric field component.

8. The field-line coupling voltage calculation device based on surface loss correction according to claim 7, characterized in that: The electric field correction unit includes: an electric field component correction term calculation unit, configured to obtain a horizontal magnetic field component under lossy surface conditions and calculate an electric field component correction term based on the horizontal magnetic field component; The corrected horizontal electric field component calculation unit is used to use the electric field component correction item to perform electric field correction on the initial electric field component to obtain a corrected horizontal electric field component.

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 based on surface loss correction according to any one of claims 1 to 6 according to the 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 based on surface loss correction according to any one of claims 1 to 6.

Images