Lightning current waveform determination method and device, equipment, medium and product

Abstract

The invention discloses a lightning current waveform determination method, apparatus and device, a medium and a product. The lightning current waveform determination method comprises the steps of obtaining historical lightning stroke positioning data of a waveform position to be determined and actually measured recording data of a detection point; according to the historical lightning stroke positioning data, establishing an electromagnetic transient simulation model of the multi-base tower at the waveform position to be determined; and according to the electromagnetic transient simulation model and the actually measured recording data, carrying out inversion on the lightning current waveform to obtain the lightning current waveform of the waveform position to be determined. An electromagnetic transient simulation model is established through actual historical lightning stroke positioning data, a real line condition is simulated, and inversion is performed on a lightning current waveform through actually measured recording data to obtain the lightning current waveform. The lightning current waveform is determined, and the accuracy of the lightning current waveform is improved.

Description

Technical Field

[0001] The present invention relates to the field of lightning protection technology, and in particular to a method, device, equipment, medium and product for determining a lightning current waveform. Background Art

[0002] Accurate lightning current waveform parameters are critical for lightning protection of transmission lines. At present, lightning location systems and line distributed fault accurate location systems have been widely used in power system lightning monitoring. The lightning location system can display various lightning parameters such as the time, location, number of return strokes and amplitude of lightning strikes in real time. At the same time, the line distributed fault accurate location system has the functions of data monitoring, fault location and fault type identification.

[0003] However, it cannot provide lightning current waveform data. The line distributed fault precise location system can monitor the current waveform on each phase line in real time when lightning strikes, but it also cannot directly obtain the lightning current waveform. Summary of the invention

[0004] The present invention provides a method, device, equipment, medium and product for determining a lightning current waveform, so as to realize the determination of the lightning current waveform.

[0005] According to a first aspect of the present invention, a method for determining a lightning current waveform is provided, comprising:

[0006] Obtain historical lightning strike location data of the waveform position to be determined and the measured wave data of the detection point;

[0007] According to the historical lightning strike location data, an electromagnetic transient simulation model of the multi-base tower at the waveform position to be determined is established;

[0008] The lightning current waveform is inverted according to the electromagnetic transient simulation model and the measured recorded data to obtain the lightning current waveform at the waveform position to be determined.

[0009] According to a second aspect of the present invention, there is provided a device for determining a lightning current waveform, comprising:

[0010] A data acquisition module is used to obtain historical lightning strike location data of the waveform position to be determined and the measured wave data of the detection point;

[0011] A model building module, used to build an electromagnetic transient simulation model of the multi-base tower at the waveform position to be determined according to the historical lightning strike location data;

[0012] The waveform determination module is used to invert the lightning current waveform according to the electromagnetic transient simulation model and the measured recorded wave data to obtain the lightning current waveform at the waveform position to be determined.

[0013] According to a third aspect of the present invention, there is provided an electronic device, the electronic device comprising:

[0014] at least one processor; and

[0015] a memory communicatively connected to the at least one processor; wherein,

[0016] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the method for determining a lightning current waveform described in any embodiment of the present invention.

[0017] According to a fourth aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method for determining a lightning current waveform as described in any embodiment of the present invention when executed.

[0018] According to a fifth aspect of the present invention, an embodiment of the present invention further provides a computer program product, the computer program product comprising a computer program, and when the computer program is executed by a processor, the method for determining a lightning current waveform of any embodiment of the present invention is implemented.

[0019] The technical solution of the embodiment of the present invention obtains the historical lightning strike location data of the waveform position to be determined and the measured wave recording data of the detection point; establishes an electromagnetic transient simulation model of multiple towers at the waveform position to be determined according to the historical lightning strike location data; inverts the lightning current waveform according to the electromagnetic transient simulation model and the measured wave recording data to obtain the lightning current waveform at the waveform position to be determined. The electromagnetic transient simulation model is established through the actual historical lightning strike location data to simulate the real line situation, and the lightning current waveform is inverted through the measured wave recording data to obtain the lightning current waveform. The determination of the lightning current waveform is achieved, and the accuracy of the lightning current waveform is improved.

[0020] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 creative work.

[0022] Figure 1is a flow chart of a method for determining a lightning current waveform provided according to Embodiment 1 of the present invention;

[0023] Figure 2 is a flow chart of a method for determining a lightning current waveform provided according to Embodiment 2 of the present invention;

[0024] Figure 3 is a waveform example diagram of a method for determining a lightning current waveform provided in accordance with Embodiment 2 of the present invention;

[0025] Figure 4 is a structural schematic diagram of a lightning current waveform determination device provided according to Embodiment 3 of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of an electronic device implementing an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme 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 described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] Embodiment 1

[0030] Figure 1 A flowchart of a method for determining a lightning current waveform is provided for the first embodiment of the present invention. This embodiment is applicable to the determination of a lightning current waveform. The method can be executed by a lightning current waveform determination device. The lightning current waveform determination device can be implemented in the form of hardware and / or software. The lightning current waveform determination device can be configured in an electronic device. Figure 1 As shown, the method includes:

[0031] S110, obtaining historical lightning strike location data of the waveform position to be determined and the measured wave data of the detection point.

[0032] In this embodiment, the waveform position to be determined can be understood as the position of the line fault caused by the lightning strike. The historical lightning strike location data can be understood as the location and situation data of the lightning strike, for example, it can include the location of the lightning strike, the lightning strike time and the lightning current amplitude. The detection point can be understood as the position of the detection device set in the line where the lightning strike occurs. The measured recorded wave data can be understood as the current waveform and the lightning current source waveform recorded by the detection device at the detection point.

[0033] Specifically, the processor can obtain data from the lightning location system of the waveform position to be determined, and obtain the location of the lightning strike, the lightning strike time, and the lightning current amplitude as the historical lightning strike location data. The processor can first determine the detection point near the lightning strike location through the lightning strike location in the historical lightning strike location data, and further determine the time period of the lightning strike through the lightning strike time in the historical lightning strike location data, and the lightning current recording data collected by the detection device at the detection point during the time period.

[0034] For example, taking a specific case as an example, the A and B phase short circuit fault of the 500kV b line in area a on the evening of April 11, 2019 was selected as a typical fault case, and the lightning data near the b line in the lightning location system in area a during this period was searched to obtain the lightning parameters of a certain return stroke near the b line, specifically the lightning strike time was 22:30:56:897 milliseconds on April 11, 2019, the lightning current amplitude was 6.5kA negative polarity, it belonged to the first subsequent return stroke, the number of statistical stations was 5 stations, the distance from the line was 469m, and the nearest tower was #40~#41. These data were used as historical lightning strike location data. It was determined that there were six sets of detection devices (such as distributed fault precise location devices) installed at the line detection point of line b, of which one set of equipment installed on the large side of phase C of tower #63 had an ID of ID1 and an installation date of November 22, 2013. The lightning current waveform data of the typical case of short circuit fault on line b monitored by the device are obtained, and the lightning current waveform data that coincides with the query data of the lightning location system in time is extracted as the measured waveform data. After query and comparison, at 22:30:56:897 ms on April 11, 2019, the line distributed fault precise location device monitored a lightning current waveform of 2.822 / 6.145μs and a current amplitude of 153.06A, that is, the lightning current waveform and current amplitude are used as the measured waveform data.

[0035] S120. Establish an electromagnetic transient simulation model of multiple towers at the waveform position to be determined based on historical lightning strike location data.

[0036] Among them, since there is a distance between the lightning current source and the detection device, the waveform will be distorted during the propagation process, and the waveform in the measured recorded data collected by the detection device is inaccurate. Therefore, it is necessary to build an electromagnetic transient simulation model that is the same as the actual line situation and eliminate the distortion through inversion.

[0037] In this embodiment, the base tower can be understood as a structure used to support the transmission line in the overhead transmission line. The electromagnetic transient simulation model can be understood as a mathematical model used to simulate the electrical behavior of the power system when it is subjected to sudden interference (such as lightning strike).

[0038] Specifically, the processor can determine the line parameters when the line where the lightning strike occurred was built and the tower parameters of the towers in the line through historical lightning strike location data, and build an electromagnetic transient simulation model through the line parameters and tower parameters. In order to generate a lightning current source, it is necessary to establish a lightning current source model to simulate the generation of a lightning current source.

[0039] S130, inverting the lightning current waveform according to the electromagnetic transient simulation model and the measured recorded wave data to obtain the lightning current waveform at the waveform position to be determined.

[0040] In this embodiment, the lightning current waveform can be understood as a unipolar pulse waveform having an arch pulse shape.

[0041] Specifically, the processor can adjust the parameters of the lightning current source model in the electromagnetic transient simulation model to simulate the lightning current source to realize the inversion of the lightning current waveform, and receive the simulation waveform of the simulation detection point in the electromagnetic transient simulation model, compare the simulation waveform with the measured recorded data, and adjust the parameters of the lightning current source model so that the difference between the obtained simulation waveform and the measured recorded data is within the error range, thereby obtaining the final lightning current waveform at the waveform position to be determined.

[0042] The technical solution of the embodiment of the present invention obtains the historical lightning strike location data of the waveform position to be determined and the measured wave recording data of the detection point; establishes an electromagnetic transient simulation model of multiple towers at the waveform position to be determined according to the historical lightning strike location data; inverts the lightning current waveform according to the electromagnetic transient simulation model and the measured wave recording data to obtain the lightning current waveform at the waveform position to be determined. The electromagnetic transient simulation model is established through the actual historical lightning strike location data to simulate the real line situation, and the lightning current waveform is inverted through the measured wave recording data to obtain the lightning current waveform. The determination of the lightning current waveform is achieved, and the accuracy of the lightning current waveform is improved.

[0043] Embodiment 2

[0044] Figure 2This is a flow chart of a method for determining a lightning current waveform provided by Embodiment 2 of the present invention. This embodiment is a further refinement of the above embodiment. Figure 2 As shown, the method includes:

[0045] S201, obtaining historical lightning strike location data of the waveform position to be determined and the measured wave recording data of the detection point.

[0046] S202. Determine historical lightning strike time periods and positioning line data based on historical lightning strike location data.

[0047] In this embodiment, the historical lightning strike time period can be understood as the time period during which a fault occurs after a lightning strike. The positioning line data can be understood as the faulty line.

[0048] Specifically, the processor can determine the location and time of the lightning strike and the location of the faulty line based on the historical lightning strike location data, and obtain the historical lightning strike time period and location line data.

[0049] S203: Determine line-related parameters and tower-related parameters according to the positioning line data.

[0050] In this embodiment, the line-related parameters can be understood as the parameters required when building the line, for example, they can include typical parameters such as the transmission line model, ground wire model, line length, span, sag, height of each phase conductor and phase spacing. The tower-related parameters can be understood as the parameters required when building the tower, for example, they can include typical parameters such as the type of each base tower, tower height, length and radius of the main material and diagonal material, cross arm length, tower grounding resistance, insulator model and insulation length.

[0051] Specifically, when building the line and the tower, the staff can record the line-related parameters and the tower-related parameters, and store them in a storage medium through the network. The processor can find the line-related parameters and the tower-related parameters of the line corresponding to the positioning line data in the storage medium.

[0052] S204: Establish an electromagnetic transient simulation model of the waveform position to be determined according to line-related parameters, tower-related parameters and historical lightning strike time periods.

[0053] Specifically, the processor may establish an electromagnetic transient simulation model of the waveform position to be determined according to line-related parameters, tower-related parameters and historical lightning strike time periods.

[0054] Further, based on the above embodiment, the steps of establishing an electromagnetic transient simulation model of the waveform position to be determined according to the line related parameters, the tower related parameters and the historical lightning strike time period can be refined as follows:

[0055] According to the tower-related parameters, the base tower is simulated through the multi-impedance model to obtain the tower model and determine the target tower position where lightning strikes occur; the lightning current source model is determined by the preset function and the target tower position; according to each tower model, line-related parameters and lightning current source model, an electromagnetic transient simulation model of the waveform position to be determined is established.

[0056] In this embodiment, the multi-impedance model can be understood as a function used in the power system to analyze the stability of the transmission line tower and the dynamic characteristics of key components such as the modular multilevel converter. The tower model can be understood as a simulation model corresponding to a real tower. The target tower position can be understood as the tower position where lightning strikes, such as between two towers. The preset function can be understood as a function used to construct a lightning current source model, such as a Heidler function.

[0057] Specifically, the processor can simulate the base tower through a multi-impedance model according to the tower-related parameters. The wave impedance of each section is calculated from the tower height, tower width, main material radius, main material length, diagonal material length and cross arm length in the actual tower-related parameters to obtain the tower model and determine the target tower position where lightning strikes. The lightning current source model is determined by the preset function and the target tower position. The insulator flashover criterion can adopt the leader development method, and its effective insulation distance is determined according to the actual situation. Other parameters are set in the model according to the real parameters. According to each tower model, line-related parameters and lightning current source model, an electromagnetic transient simulation model of the waveform position to be determined is established.

[0058] Exemplarily, the processor can build an electromagnetic transient simulation model based on the line-related parameters of line b. Since the typical lightning strike in this embodiment occurs at the #40~#41 towers, a tower model of the seven base towers near the #40 tower and the #63 tower where the detection device of the detection point is located is built. Specifically, in this embodiment, the processor can use PSCAD / EMTDC simulation software, and each base tower is simulated using a multi-wave impedance model. The wave impedance of each section is calculated by the tower height, tower width, main material radius, main material length, diagonal material length, and cross arm length of the actual tower. The model of the transmission line conductor is e; the model of the ground wire is f on the left and g on the right; the insulator flashover criterion adopts the pilot development method, and its effective insulation distance is h. Other parameters are set in the model according to the real parameters.

[0059] Exemplarily, the lightning current source model is fitted using the Heidler function, and its model expression is:

[0060]

[0061] In the formula, Im is the peak value of lightning current; η is the correction coefficient of the peak value of lightning current; τ1 is the wave head time constant; τ2 is the wave tail time constant; n is the current steepness factor. The lightning shield is set at the center of the #40~#41 tower span and connected to the A phase line in the form of a current source, with a wave impedance of 800Ω.

[0062] S205, initializing lightning current model parameters of a lightning current source model in an electromagnetic transient simulation model, and performing lightning current waveform inversion.

[0063] Among them, the lightning current model parameters include lightning current peak value, wave head time constant and wave tail time constant.

[0064] Specifically, the processor may initialize the lightning current model parameters of the lightning current source model in the electromagnetic transient simulation model according to preset initial values, and perform lightning current waveform inversion.

[0065] S206, obtaining simulation waveform data of simulation detection points in the electromagnetic transient simulation model.

[0066] In this embodiment, the simulation detection point can be understood as a detection point corresponding to an actual detection point, for example, in the electromagnetic transient simulation model, the #63 tower model is also used as a detection point. The simulation waveform data can be understood as current waveforms and lightning current source waveforms collected through the simulation detection points as simulation waveform data.

[0067] Specifically, after the lightning current model parameters of the lightning current source model in the electromagnetic transient simulation model are initialized, a lightning current source will also be generated and transmitted to the simulation detection point through the line built by the tower, and the processor can obtain the simulation waveform data of the simulation detection point.

[0068] S207, adjusting the lightning current model parameters and performing lightning current waveform inversion according to the simulation waveform data and the measured waveform data, until the end condition is met, and obtaining the lightning current waveform at the waveform position to be determined.

[0069] Among them, the simulated waveform data includes simulated waveform parameters of the simulated current waveform, and the measured waveform data includes measured waveform parameters of the measured current waveform. Correspondingly, the termination condition is: the error between the simulated waveform parameters and the measured waveform parameters is less than the set error threshold.

[0070] Specifically, the processor can adjust the parameters of the lightning current source model in the simulation to obtain the waveform of the detection point in the simulation, compare it with the actual recorded wave data to determine the difference between the two. If the difference meets the end condition, the lightning current waveform at the position of the waveform to be determined can be directly obtained through the lightning current source model; otherwise, the parameters of the lightning current model are adjusted and the lightning current waveform inversion is performed again to obtain the adjusted simulation waveform data, and then compared with the actual recorded wave data again until the end condition is met and the lightning current waveform at the position of the waveform to be determined is obtained through the lightning current source model.

[0071] Exemplarily, by adjusting the front time constant τ1 and the tail time constant τ2 of the above lightning current model parameters of this embodiment, the front time T of the lightning current wave of the simulated current waveform at the detection point is indirectly adjusted. 1L and the tail time T 2L ; by adjusting the lightning current peak value I L in the lightning current model parameters, the lightning current amplitude I ML of the simulated current waveform at the detection point is indirectly adjusted. When detecting the current waveform on the large side of phase C of tower #63 during a lightning shielding failure, extract the waveform data and read out the front time T 1L and the tail time T 2L of the current waveform, and the current amplitude I L .

[0072] Exemplarily, in the actual recorded wave data, the actual front time T1 of the lightning current is approximately equal to 2.822 μs, and the set error threshold in the end condition can be, for example, 10%, that is, the range of T1 should be 2.5398 μs < T1 < 3.1042 μs. In the actual recorded wave data, the actual tail time T2 of the lightning current is approximately equal to 6.145 μs. Considering a 10% error, that is, the range of T2 should be 5.5305 μs < T2 < 6.7595 μs. In the actual recorded wave data, the actual peak value I m of the lightning current is approximately equal to 153.06 A. Considering a 10% error, that is, the range of I m should be 137.754 A < I m < 168.366 A.

[0073] Exemplarily, a final adjusted simulation example is shown. The waveform finally obtained in the simulation waveform data is 2.948 / 6.440 μs, and the current amplitude is 164 A. Within the above error tolerance range, the inverted lightning current waveform is 3.221 / 9.361 μs at this time. Figure 3 This is the waveform example diagram in a method for determining a lightning current waveform provided in the second embodiment of the present invention. As Figure 3As shown in the figure, the solid line is the measured recorded waveform, and the dotted line is the simulated waveform obtained by inversion. Under this parameter, the simulated waveform is relatively consistent with the measured recorded waveform. Since the electromagnetic transient simulation model is built with actual parameters, the distortion is also simulated. Therefore, the waveform obtained by this simulation model eliminates the distortion problem, and the simulated waveform can be used as the final lightning current waveform required.

[0074] The technical solution of the embodiment of the present invention obtains the historical lightning strike location data of the waveform position to be determined, determines the historical lightning strike time period and the positioning line data, determines the line-related parameters and the tower-related parameters according to the positioning line data, and establishes an electromagnetic transient simulation model based on the real line data and the tower data to simulate the real line situation, and inverts the lightning current waveform through the measured wave recording data in the historical lightning strike time period, and adjusts the lightning current model parameters to control the error between the simulated waveform data of the simulation detection point and the measured wave recording data within the error range, and when the end condition is met, the lightning current waveform under the lightning current model parameters is obtained. The electromagnetic transient simulation model is built through the actual line parameters, and the data of the lightning location system and the line distributed fault precise location system are effectively combined, the distortion in the waveform transmission process is eliminated, the determination of the lightning current waveform is achieved, and the accuracy of the lightning current waveform is improved.

[0075] Embodiment 3

[0076] Figure 4 This is a schematic diagram of the structure of a lightning current waveform determination device provided by Embodiment 3 of the present invention. Figure 4 As shown, the device includes: a data acquisition module 41, a model building module 42 and a waveform determination module 43.

[0077] The data acquisition module 41 is used to acquire the historical lightning strike location data of the waveform position to be determined and the measured wave data of the detection point;

[0078] A model building module 42 is used to build an electromagnetic transient simulation model of the multi-base tower at the waveform position to be determined according to the historical lightning strike location data;

[0079] The waveform determination module 43 is used to invert the lightning current waveform according to the electromagnetic transient simulation model and the measured recorded wave data to obtain the lightning current waveform at the waveform position to be determined.

[0080] Furthermore, the model building module 42 includes:

[0081] A first determining unit, configured to determine a historical lightning strike time period and positioning line data according to the historical lightning strike positioning data;

[0082] A second determining unit, configured to determine line-related parameters and tower-related parameters according to the positioning line data;

[0083] The third determination unit is used to establish an electromagnetic transient simulation model of the waveform position to be determined according to the line-related parameters, the tower-related parameters and the historical lightning strike time period.

[0084] The third determining unit is specifically used for:

[0085] The base tower is simulated by a multi-impedance model according to the tower-related parameters to obtain a tower model, and a target tower position where a lightning strike occurs is determined;

[0086] Determine a lightning current source model by using a preset function and the target tower position;

[0087] An electromagnetic transient simulation model of the waveform position to be determined is established according to each of the tower models, the line-related parameters and the lightning current source model.

[0088] Furthermore, the waveform determination module 43 is specifically used for:

[0089] Initializing lightning current model parameters of a lightning current source model in the electromagnetic transient simulation model, and performing lightning current waveform inversion;

[0090] Acquire simulation waveform data of simulation detection points in the electromagnetic transient simulation model;

[0091] According to the simulation waveform data and the measured waveform data, the lightning current model parameters are adjusted and the lightning current waveform inversion is performed until the end condition is met to obtain the lightning current waveform at the waveform position to be determined.

[0092] The lightning current model parameters include lightning current peak value, wave head time constant and wave tail time constant.

[0093] Among them, the simulated waveform data includes simulated waveform parameters of the simulated current waveform, and the measured recorded data includes measured waveform parameters of the measured current waveform. Correspondingly, the termination condition is: the error between the simulated waveform parameters and the measured waveform parameters is less than the set error threshold.

[0094] The lightning current waveform determination device provided in the embodiment of the present invention can execute the lightning current waveform determination method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0095] Embodiment 4

[0096] Figure 5A schematic diagram of an electronic device 50 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0097] like Figure 5 As shown, the electronic device 50 includes at least one processor 51, and a memory connected to the at least one processor 51 in communication, such as a read-only memory (ROM) 52, a random access memory (RAM) 53, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 51 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 52 or the computer program loaded from the storage unit 58 to the random access memory (RAM) 53. In the RAM 53, various programs and data required for the operation of the electronic device 50 can also be stored. The processor 51, the ROM 52, and the RAM 53 are connected to each other via a bus 54. An input / output (I / O) interface 55 is also connected to the bus 54.

[0098] A number of components in the electronic device 50 are connected to the I / O interface 55, including: an input unit 56, such as a keyboard, a mouse, etc.; an output unit 57, such as various types of displays, speakers, etc.; a storage unit 58, such as a disk, an optical disk, etc.; and a communication unit 59, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 59 allows the electronic device 50 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0099] The processor 51 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 51 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 51 executes the various methods and processes described above, such as a method for determining a lightning current waveform.

[0100] In some embodiments, the method for determining a lightning current waveform may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 58. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 50 via the ROM 52 and / or the communication unit 59. When the computer program is loaded into the RAM 53 and executed by the processor 51, one or more steps of the method for determining a lightning current waveform described above may be performed. Alternatively, in other embodiments, the processor 51 may be configured to execute the method for determining a lightning current waveform in any other appropriate manner (e.g., by means of firmware).

[0101] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0102] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0103] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0104] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0105] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0106] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0107] In one embodiment, the embodiment of the present invention further includes a computer program product, the computer program product includes a computer program, and when the computer program is executed by a processor, the method for determining a lightning current waveform of any embodiment of the present invention is implemented.

[0108] In the process of implementation, the computer program product can be written in one or more programming languages ​​or a combination thereof to perform the computer program code of the present invention, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, using an Internet service provider to connect through the Internet).

[0109] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0110] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for determining a lightning current waveform, characterized in that: include: Obtain historical lightning strike location data of the waveform position to be determined and the measured wave data of the detection point; According to the historical lightning strike location data, an electromagnetic transient simulation model of the multi-base tower at the waveform position to be determined is established; The lightning current waveform is inverted according to the electromagnetic transient simulation model and the measured recorded data to obtain the lightning current waveform at the waveform position to be determined.

2. The method according to claim 1, characterized in that The step of establishing an electromagnetic transient simulation model of multiple towers at the waveform position to be determined according to the historical lightning strike location data includes: Determine the historical lightning strike time period and positioning line data according to the historical lightning strike location data; Determine line-related parameters and tower-related parameters according to the positioning line data; An electromagnetic transient simulation model of the waveform position to be determined is established according to the line-related parameters, the tower-related parameters and the historical lightning strike time period.

3. The method according to claim 2, characterized in that The step of establishing the electromagnetic transient simulation model of the waveform position to be determined according to the line-related parameters, the tower-related parameters and the historical lightning strike time period includes: The base tower is simulated by a multi-impedance model according to the tower-related parameters to obtain a tower model, and a target tower position where a lightning strike occurs is determined; Determine a lightning current source model by using a preset function and the target tower position; An electromagnetic transient simulation model of the waveform position to be determined is established according to each of the tower models, the line-related parameters and the lightning current source model.

4. The method according to claim 1, characterized in that: The inversion of the lightning current waveform according to the electromagnetic transient simulation model and the measured recorded wave data to obtain the lightning current waveform at the waveform position to be determined includes: Initializing lightning current model parameters of a lightning current source model in the electromagnetic transient simulation model, and performing lightning current waveform inversion; Acquire simulation waveform data of simulation detection points in the electromagnetic transient simulation model; According to the simulation waveform data and the measured waveform data, the lightning current model parameters are adjusted and the lightning current waveform inversion is performed until the end condition is met to obtain the lightning current waveform at the waveform position to be determined.

5. The method according to claim 4, characterized in that The lightning current model parameters include lightning current peak value, wave head time constant and wave tail time constant.

6. The method according to claim 4, characterized in that The simulated waveform data includes simulated waveform parameters of the simulated current waveform, and the measured waveform data includes measured waveform parameters of the measured current waveform. Accordingly, the termination condition is that the error between the simulated waveform parameters and the measured waveform parameters is less than a set error threshold.

7. A device for determining a lightning current waveform, characterized in that: include: A data acquisition module, used to obtain historical lightning strike location data of the waveform position to be determined and the measured wave data of the detection point; A model building module, used to build an electromagnetic transient simulation model of the multi-base tower at the waveform position to be determined according to the historical lightning strike location data; The waveform determination module is used to invert the lightning current waveform according to the electromagnetic transient simulation model and the measured recorded wave data to obtain the lightning current waveform at the waveform position to be determined.

8. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform the method for determining a lightning current waveform according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method for determining a lightning current waveform according to any one of claims 1 to 6 when the processor executes the instructions.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the computer program implements the method for determining a lightning current waveform according to any one of claims 1 to 6.

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