A train operation safety analysis method, system, device and storage medium

Abstract

The present application discloses a method for analyzing the operation safety of a train, including: establishing an equivalent three-dimensional model of the train; determining the parameter information of the vehicle body equivalent circuit model at the target frequency by simulating the equivalent three-dimensional model; establishing the equivalent circuit model of the train according to the parameter information; after setting the input source of the equivalent circuit model, determining the current distribution information in the equivalent circuit model; injecting current into the equivalent three-dimensional model according to the current distribution information, determining the surface current distribution results of the train components, and performing the operation safety analysis of the train based on the surface current distribution results. The scheme of the present application can be used to effectively perform the operation safety analysis of the train, with low cost, easy implementation, and small amount of calculation, which is conducive to convenient and quick analysis. The present application also provides a system, equipment and storage medium for analyzing the operation safety of a train, which have corresponding technical effects.

Description

Technical Field

[0001] The present invention relates to the field of rail transit technology, and in particular to a train operation safety analysis method, system, equipment and storage medium. Background Art

[0002] In recent years, rail transit has developed rapidly. With the continuous increase in the speed of high-speed trains, the traction current of trains has gradually increased, and the electromagnetic environment when trains are running on the line has become more and more complex. Therefore, the current distribution of the car body structure needs to be studied in order to conduct a safety analysis of the train operation.

[0003] The car body is an important path for the train's current and overvoltage to be discharged. When the current distributed on the car body is too large, the car body parts will not only heat up severely, but also produce electrochemical reactions, corrode metal parts, and greatly increase the wear of parts. In addition, some important sensors are installed on the car body, such as speed sensors, temperature sensors, etc. When the electromagnetic environment of the car body is too complex, electromagnetic interference will interfere with the sensors, affect the normal operation of the sensors, and even cause high voltage breakdown to damage the sensors, seriously affecting the driving safety of the train.

[0004] At present, actual tests are mainly carried out on-site using test equipment. Sensors are used to detect overvoltage conditions and current distribution on the vehicle body and track, and then train operation safety analysis is carried out. However, such operation costs are high, especially when there are many types of trains that need to be tested. This method requires a lot of time and manpower costs.

[0005] In summary, how to effectively conduct train operation safety analysis is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0006] The object of the present invention is to provide a train operation safety analysis method, system, device and storage medium to effectively perform train operation safety analysis.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A train operation safety analysis method, comprising:

[0009] Establish an equivalent three-dimensional model of the train;

[0010] Determining parameter information of a vehicle body equivalent circuit model at a target frequency by simulating the equivalent three-dimensional model;

[0011] Establishing an equivalent circuit model of the train according to the parameter information;

[0012] After setting the input source of the equivalent circuit model, determining the current distribution information in the equivalent circuit model;

[0013] Current is injected into the equivalent three-dimensional model according to the current distribution information to determine the surface current distribution results of the train components, so as to perform operation safety analysis of the train based on the surface current distribution results.

[0014] Preferably, the parameter information at least includes:

[0015] a resistive component of the equivalent impedance of the bogie of the train;

[0016] a capacitive component of the equivalent impedance of the bogie of the train;

[0017] an inductive component of an equivalent impedance of a bogie of the train;

[0018] The distributed capacitance of high-voltage transmission lines to the vehicle body.

[0019] Preferably, the equivalent circuit model includes:

[0020] A power supply equivalent circuit in which the input end is connected to the pantograph and the output end is connected to the rail equivalent circuit;

[0021] The rail equivalent circuit;

[0022] Equivalent circuit of N car body frames connected in series;

[0023] The distributed capacitance of K high-voltage transmission lines to the vehicle body, wherein the first ends of the distributed capacitance of K high-voltage transmission lines to the vehicle body are connected to the pantograph, and the second ends are respectively connected to the vehicle body frame equivalent circuits of the K vehicle bodies through which the high-voltage return line passes;

[0024] M bogie grounding equivalent circuits connected to the rail equivalent circuit, wherein a first end of each bogie grounding equivalent circuit is connected to a corresponding car body frame equivalent circuit, and a second end of each bogie grounding equivalent circuit is connected to the rail equivalent circuit;

[0025] Among them, N represents the number of car body frames of the train, K represents the number of car bodies through which the high-voltage return line passes, and M represents the number of circuit connections between the car body frame and the bogie.

[0026] Preferably, each bogie grounding equivalent circuit comprises:

[0027] A first capacitor, a second capacitor, a first inductor and a first resistor are sequentially connected in series, and a first end of the first capacitor serves as a first end of the bogie grounding equivalent circuit, and a second end of the first resistor serves as a second end of the bogie grounding equivalent circuit;

[0028] a second resistor connected in parallel with the first capacitor;

[0029] an RL branch connected in parallel with the second capacitor, the RL branch comprising a second inductor and a third resistor connected in series with the second inductor;

[0030] Among them, the first capacitor represents the coupling capacitance between adjacent car bodies, the second capacitor represents the capacitive component of the equivalent impedance of the bogie of the train, the first inductor represents the coupling inductance between adjacent car bodies, the first resistor represents the equivalent resistance of the grounding carbon brush, the second resistor represents the grounding resistance between the car body and the bogie, the second inductor represents the inductive component of the equivalent impedance of the bogie of the train, and the third resistor represents the resistive component of the equivalent impedance of the bogie of the train.

[0031] Preferably, the target frequency is a frequency selected from a preset high frequency range, and the high frequency range is 9 kHz to 30 MHz.

[0032] Preferably, the performing of the train operation safety analysis based on the surface current distribution result includes:

[0033] The fault analysis of train components is carried out based on the surface current distribution results, and prompt information is output when the faulty component is determined.

[0034] Preferably, it also includes:

[0035] An operating condition adjustment instruction is received, and an input source of the equivalent circuit model is adjusted according to the content of the operating condition adjustment instruction.

[0036] A train operation safety analysis system, comprising:

[0037] An equivalent three-dimensional model building module is used to build an equivalent three-dimensional model of the train;

[0038] A parameter information determination module, used to determine parameter information of a vehicle body equivalent circuit model at a target frequency by simulating the equivalent three-dimensional model;

[0039] An equivalent circuit model building module, used to build an equivalent circuit model of the train according to the parameter information;

[0040] A current distribution information determination module, configured to determine current distribution information in the equivalent circuit model after setting an input source of the equivalent circuit model;

[0041] The operation safety analysis module is used to inject current into the equivalent three-dimensional model according to the current distribution information, determine the surface current distribution results of the train components, and perform operation safety analysis of the train based on the surface current distribution results.

[0042] A train operation safety analysis device, comprising:

[0043] Memory for storing computer programs;

[0044] A processor is used to execute the computer program to implement the steps of the train operation safety analysis method as described in any one of the above items.

[0045] A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the train operation safety analysis method as described in any one of the above items.

[0046] By applying the technical solution provided by the embodiment of the present invention, the operation safety analysis of the train is realized based on the simulation method, which reduces the cost and is time-consuming compared with the on-site detection method. Specifically, in the solution of the present application, an equivalent three-dimensional model of the train will be established, and the present application further considers that if the surface current distribution of the train components is analyzed directly based on the equivalent three-dimensional model of the train, the amount of calculation will be very large. Therefore, in the solution of the present application, the parameter information of the car body equivalent circuit model at the target frequency is determined by simulating the equivalent three-dimensional model, and then the equivalent circuit model of the train is established according to the parameter information. After setting the input source of the equivalent circuit model, the current distribution information in the equivalent circuit model can be determined, that is, the current distribution information is obtained by the equivalent circuit model, and the amount of calculation is small. Finally, according to the current distribution information, the current is injected into the equivalent three-dimensional model, and the surface current distribution results of the train components can be determined, so as to perform the operation safety analysis of the train based on the surface current distribution results. In summary, the solution of the present application can effectively perform the operation safety analysis of the train, with low cost, easy implementation, and small amount of calculation, which is conducive to convenient and quick analysis. 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0048] Figure 1 It is a flow chart of the implementation of a train operation safety analysis method in the present invention;

[0049] Figure 2 It is a structural schematic diagram of an equivalent circuit model of a train established in a specific implementation manner of the present invention;

[0050] Figure 3The figure is a schematic diagram of the structure of a train operation safety analysis system in the present invention. DETAILED DESCRIPTION

[0051] The core of the present invention is to provide a train operation safety analysis method, which can effectively perform train operation safety analysis, has low cost, is easy to implement, and has a small amount of calculation, which is conducive to convenient and quick analysis.

[0052] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] Please refer to Figure 1 , Figure 1 The present invention is a flow chart of an implementation of a train operation safety analysis method, and the train operation safety analysis method may include the following steps:

[0054] Step S101: Establish an equivalent three-dimensional model of the train.

[0055] There are many ways to establish an equivalent three-dimensional model of a train, which can be selected according to actual needs, and this application does not elaborate on this. And it can be understood that the equivalent three-dimensional model of the train established is different depending on the structure of the train.

[0056] Step S102: Determine parameter information of the vehicle body equivalent circuit model at the target frequency by simulating the equivalent three-dimensional model.

[0057] The parameter information of the car body equivalent circuit model is the impedance characteristics of each component in the car body equivalent circuit model, and when the set target frequency is different, the determined impedance characteristics will be different. The target frequency refers to the frequency of the alternating current received by the train from the pantograph. In addition, it should be noted that in actual applications, the high-voltage line is 25KV, 50HZ alternating current, and after voltage reduction, 380V, 50HZ alternating current can be obtained, but due to the complex electromagnetic environment, harmonics will be generated. In the scheme of the present application, the parameter information of the car body equivalent circuit model at the target frequency is determined, so that the surface current distribution results of the train components at the target frequency are subsequently determined, and in actual applications, in order to conduct a comprehensive train operation safety analysis. The value of the target frequency can be adjusted as needed, that is, the scheme of the present application is executed separately at different target frequencies to obtain the surface current distribution results of the train components at the corresponding frequencies, thereby achieving a more comprehensive train operation safety analysis.

[0058] The target frequency can be set and adjusted as needed, and considering that it is mainly high-frequency harmonics that affect the train, the target frequency is usually set to high frequency. For example, in a specific embodiment of the present invention, the target frequency is a frequency selected from a preset high-frequency range, and the high-frequency range is 9kHz to 30MHz. In specific occasions, several common harmonic frequencies can be selected from 9kHz to 30MHz as target frequencies to execute the scheme of the present application, and obtain the surface current distribution results of the train components at various frequencies.

[0059] Step S103: Establish an equivalent circuit model of the train according to the parameter information.

[0060] As described above, through the simulation of the equivalent three-dimensional model, the impedance characteristics of each component of the train at the target frequency, that is, the parameter information, can be determined, and then based on this parameter information and combined with the circuit structure of the train, an equivalent circuit model of the train can be established.

[0061] The parameter information may include the equivalent resistance and inductance of the power system, the equivalent resistance and inductance of each car body, the equivalent resistance of the connecting wires between car bodies, the protective grounding resistance, the coupling capacitance and mutual inductance between adjacent car bodies, the equivalent resistance of the grounding carbon brush, the equivalent resistance and inductance of the rails, etc.

[0062] In a specific implementation of the present invention, the parameter information at least includes:

[0063] The resistive component of the equivalent impedance of the train's bogie;

[0064] The capacitive component of the equivalent impedance of the train bogie;

[0065] The inductive component of the equivalent impedance of the train bogie;

[0066] The distributed capacitance of high-voltage transmission lines to the vehicle body.

[0067] In this implementation, considering that high-frequency transmission lines will generate distributed capacitance to the vehicle body, the parameter information includes the distributed capacitance. In addition, the parameter information also takes into account the impedance characteristics of the train bogie, that is, the resistive component, capacitive component and inductive component of the equivalent impedance of the train bogie, which is conducive to making the equivalent circuit model of the train more accurate, and then more accurate current distribution information can be determined later.

[0068] In a specific embodiment of the present invention, the established equivalent circuit model includes:

[0069] A power supply equivalent circuit in which the input end is connected to the pantograph and the output end is connected to the rail equivalent circuit;

[0070] Rail equivalent circuit;

[0071] Equivalent circuit of N car body frames connected in series;

[0072] The distributed capacitance of K high-voltage transmission lines to the vehicle body, and the first ends of the distributed capacitance of K high-voltage transmission lines to the vehicle body are all connected to the pantograph, and the second ends are respectively connected to the vehicle body frame equivalent circuits of the K vehicles through which the high-voltage return line passes;

[0073] M bogie grounding equivalent circuits connected to the rail equivalent circuit, a first end of each bogie grounding equivalent circuit connected to a corresponding car body frame equivalent circuit, and a second end of each bogie grounding equivalent circuit connected to the rail equivalent circuit;

[0074] Among them, N represents the number of body frames of the train, K represents the number of bodies through which the high-voltage return line passes, and M represents the number of circuit connections between the body frame and the bogie.

[0075] See also Figure 2 , is an equivalent circuit model in a specific implementation. Figure 2 In the embodiment of the present invention, the train has an 8-car structure, and the 2nd and 6th cars are power cars, so Figure 2 In the implementation manner, the power supply equivalent circuit includes two parallel power supply equivalent branches, the input end of each power supply equivalent branch is connected to the pantograph, and the output end is connected to the rail equivalent circuit. Each power supply equivalent branch includes: a high-voltage switch connected in series, an equivalent inductance L0 of a power system, an equivalent resistance R0 of a power system, and a carbon brush unit. Figure 2 In the embodiment of the vehicle, the power system is connected to the rail through two carbon brushes, so Figure 2 The carbon brush unit in each power supply equivalent branch includes two parallel grounded carbon brush equivalent resistors r.

[0076] The rail equivalent circuit can be composed of a plurality of rail equivalent resistors Rr and a plurality of rail equivalent inductors Lr connected in series.

[0077] Figure 2 The vehicle type in the figure is 8, that is, N is 8, so the equivalent circuit model includes 8 car body frame equivalent circuits connected in series in sequence. Each car body frame equivalent circuit includes 4 car body equivalent resistors Rt and 4 car body equivalent resistors and inductors Lt, which are connected in series in a ring.

[0078] exist Figure 2 In the implementation manner, an equivalent resistor Ru of the connecting wire between vehicle bodies is also provided in the equivalent circuit of adjacent vehicle body frames.

[0079] In a high-frequency environment, distributed capacitance of the high-voltage transmission line to the vehicle body will be generated, and in the equivalent circuit model, these distributed capacitances are located between the vehicle body and the pantograph through which the high-voltage return line passes. Figure 2 In the embodiment, the vehicle bodies through which the high-voltage return line passes are vehicle bodies 2 to 6, therefore, Figure 2 The figure shows five distributed capacitances Cct of the high-voltage transmission line to the vehicle body. The first ends of these distributed capacitances Cct are connected to the pantographs, and the second ends are respectively connected to the vehicle body frame equivalent circuits of the five vehicle bodies through which the high-voltage return line passes.

[0080] The M bogie grounding equivalent circuits connected to the rail equivalent circuit usually include the grounding resistance between the car body and the bogie, the equivalent resistance of the bogie of the train, and the grounding carbon brush equivalent resistance. The specific number of M depends on the actual train structure, for example Figure 2 In the implementation mode of FIG. 1 , the equivalent circuit model includes 12 bogie grounding equivalent circuits, and since the structures are the same, Figure 2 Only the specific circuit structures of three bogie grounding equivalent circuits are shown.

[0081] In a specific embodiment of the present invention, each bogie grounding equivalent circuit includes:

[0082] A first capacitor, a second capacitor, a first inductor and a first resistor are sequentially connected in series, and a first end of the first capacitor serves as a first end of a bogie grounding equivalent circuit, and a second end of the first resistor serves as a second end of the bogie grounding equivalent circuit;

[0083] a second resistor connected in parallel with the first capacitor;

[0084] an RL branch connected in parallel with the second capacitor, the RL branch comprising a second inductor and a third resistor connected in series with the second inductor;

[0085] Among them, the first capacitor represents the coupling capacitance between adjacent car bodies, the second capacitor represents the capacitive component of the equivalent impedance of the train's bogie, the first inductor represents the coupling inductance between adjacent car bodies, the first resistor represents the equivalent resistance of the grounding carbon brush, the second resistor represents the grounding resistance between the car body and the bogie, the second inductor represents the inductive component of the equivalent impedance of the train's bogie, and the third resistor represents the resistive component of the equivalent impedance of the train's bogie.

[0086] Figure 2 This implementation method is selected in the implementation method, because the capacitive component of the equivalent impedance of the train's bogie and the inductive component of the equivalent impedance of the train's bogie are taken into account in the bogie grounding equivalent circuit, compared with the solution that only considers the equivalent resistance of the train's bogie, the constructed equivalent circuit model can be more accurate, and more accurate current distribution information can be determined subsequently.

[0087] Furthermore, this implementation also takes into account the coupling capacitance between adjacent vehicle bodies, further improving the accuracy of the constructed equivalent circuit model.

[0088] exist Figure 2 In the figure, the coupling capacitance between adjacent car bodies, i.e., the first capacitance, is marked as Cbt. The capacitive component of the equivalent impedance of the train's bogie, i.e., the second capacitance, is marked as Cb. The coupling inductance between adjacent car bodies, i.e., the first inductance, is marked as Lbt. The grounding carbon brush equivalent resistance, i.e., the first resistance, is marked as r. The grounding resistance between the car body and the bogie, i.e., the second resistance, is marked as Rg, which serves as a protective grounding resistance. The inductive component of the equivalent impedance of the train's bogie, i.e., the second inductance, is marked as Lb. The resistive component of the equivalent impedance of the train's bogie, i.e., the third resistance, is marked as Rb.

[0089] Step S104: After setting the input source of the equivalent circuit model, current distribution information in the equivalent circuit model is determined.

[0090] After the equivalent circuit model of the train is established, the input source of the equivalent circuit model is set, and the current distribution information in the equivalent circuit model can be determined. The input source of the equivalent circuit model can be set to 25KV, 50Hz alternating current, for example.

[0091] The current distribution information in the determined equivalent circuit model may include current information at each set position.

[0092] In a specific embodiment of the present invention, it may also include:

[0093] Receive an operating condition adjustment instruction, and adjust an input source of the equivalent circuit model according to the content of the operating condition adjustment instruction.

[0094] In this implementation, considering that the current distribution information in the equivalent circuit model of the train will change adaptively under different working conditions, it is allowed to adjust the input source of the equivalent circuit model according to the content of the working condition adjustment instruction, that is, adjust Figure 2 By using U1 and / or U2 in the circuit, it is possible to obtain the current distribution information in the equivalent circuit model under different working conditions, thereby enabling a more comprehensive analysis of the train's operation safety.

[0095] Step S105: inject current into the equivalent three-dimensional model according to the current distribution information, determine the surface current distribution results of the train components, and perform train operation safety analysis based on the surface current distribution results.

[0096] As described above, the current distribution information in the determined equivalent circuit model may include the current information at each set position, so that current injection can be performed on the equivalent three-dimensional model. For example, in a specific scenario, considering the convenience of calculation, the current distribution information in the determined equivalent circuit model includes the current value in the power supply equivalent circuit, the current value in the car body frame equivalent circuit, and the current value in the bogie grounding equivalent circuit. Based on this, current is injected into the equivalent three-dimensional model to determine the surface current distribution results of the train components.

[0097] When conducting a train operation safety analysis based on the surface current distribution results, the specific analysis method and analysis items can be set and adjusted according to actual needs. For example, a commonly used method is to conduct fault analysis, that is, to conduct a fault analysis of train components based on the surface current distribution results, and when a faulty component is determined, a prompt message can be output to remind relevant staff to pay attention to the situation.

[0098] By applying the technical solution provided by the embodiment of the present invention, the operation safety analysis of the train is realized based on the simulation method, which reduces the cost and is time-consuming compared with the on-site detection method. Specifically, in the solution of the present application, an equivalent three-dimensional model of the train will be established, and the present application further considers that if the surface current distribution of the train components is analyzed directly based on the equivalent three-dimensional model of the train, the amount of calculation will be very large. Therefore, in the solution of the present application, the parameter information of the car body equivalent circuit model at the target frequency is determined by simulating the equivalent three-dimensional model, and then the equivalent circuit model of the train is established according to the parameter information. After setting the input source of the equivalent circuit model, the current distribution information in the equivalent circuit model can be determined, that is, the current distribution information is obtained by the equivalent circuit model, and the amount of calculation is small. Finally, according to the current distribution information, the current is injected into the equivalent three-dimensional model, and the surface current distribution results of the train components can be determined, so as to perform the operation safety analysis of the train based on the surface current distribution results. In summary, the solution of the present application can effectively perform the operation safety analysis of the train, with low cost, easy implementation, and small amount of calculation, which is conducive to convenient and quick analysis.

[0099] Corresponding to the above method embodiment, an embodiment of the present invention further provides a train operation safety analysis system, which can be referred to in correspondence with the above.

[0100] See also Figure 3 FIG. 1 is a schematic diagram of a train operation safety analysis system according to the present invention, comprising:

[0101] An equivalent three-dimensional model building module 301 is used to build an equivalent three-dimensional model of the train;

[0102] The parameter information determination module 302 is used to determine the parameter information of the vehicle body equivalent circuit model at the target frequency by simulating the equivalent three-dimensional model;

[0103] An equivalent circuit model building module 303 is used to build an equivalent circuit model of the train according to the parameter information;

[0104] The current distribution information determination module 304 is used to determine the current distribution information in the equivalent circuit model after setting the input source of the equivalent circuit model;

[0105] The operation safety analysis module 305 is used to inject current into the equivalent three-dimensional model according to the current distribution information, determine the surface current distribution results of the train components, and perform operation safety analysis of the train based on the surface current distribution results.

[0106] In a specific implementation of the present invention, the parameter information at least includes:

[0107] The resistive component of the equivalent impedance of the train's bogie;

[0108] The capacitive component of the equivalent impedance of the train bogie;

[0109] The inductive component of the equivalent impedance of the train bogie;

[0110] The distributed capacitance of high-voltage transmission lines to the vehicle body.

[0111] In a specific embodiment of the present invention, the equivalent circuit model includes:

[0112] A power supply equivalent circuit in which the input end is connected to the pantograph and the output end is connected to the rail equivalent circuit;

[0113] Rail equivalent circuit;

[0114] Equivalent circuit of N car body frames connected in series;

[0115] The distributed capacitance of K high-voltage transmission lines to the vehicle body, and the first ends of the distributed capacitance of K high-voltage transmission lines to the vehicle body are all connected to the pantograph, and the second ends are respectively connected to the vehicle body frame equivalent circuits of the K vehicles through which the high-voltage return line passes;

[0116] M bogie grounding equivalent circuits connected to the rail equivalent circuit, a first end of each bogie grounding equivalent circuit connected to a corresponding car body frame equivalent circuit, and a second end of each bogie grounding equivalent circuit connected to the rail equivalent circuit;

[0117] Among them, N represents the number of body frames of the train, K represents the number of bodies through which the high-voltage return line passes, and M represents the number of circuit connections between the body frame and the bogie.

[0118] In a specific embodiment of the present invention, each bogie grounding equivalent circuit includes:

[0119] A first capacitor, a second capacitor, a first inductor and a first resistor are sequentially connected in series, and a first end of the first capacitor serves as a first end of a bogie grounding equivalent circuit, and a second end of the first resistor serves as a second end of the bogie grounding equivalent circuit;

[0120] a second resistor connected in parallel with the first capacitor;

[0121] an RL branch connected in parallel with the second capacitor, the RL branch comprising a second inductor and a third resistor connected in series with the second inductor;

[0122] Among them, the first capacitor represents the coupling capacitance between adjacent car bodies, the second capacitor represents the capacitive component of the equivalent impedance of the train's bogie, the first inductor represents the coupling inductance between adjacent car bodies, the first resistor represents the equivalent resistance of the grounding carbon brush, the second resistor represents the grounding resistance between the car body and the bogie, the second inductor represents the inductive component of the equivalent impedance of the train's bogie, and the third resistor represents the resistive component of the equivalent impedance of the train's bogie.

[0123] In a specific implementation of the present invention, the target frequency is a frequency selected from a preset high frequency range, and the high frequency range is 9 kHz to 30 MHz.

[0124] In a specific implementation of the present invention, the operation safety analysis module 305 performs the operation safety analysis of the train based on the surface current distribution result, specifically including:

[0125] The fault analysis of train components is carried out based on the surface current distribution results, and prompt information is output when the faulty component is determined.

[0126] In a specific embodiment of the present invention, it also includes:

[0127] The operating condition adjustment module is used to receive the operating condition adjustment instruction and adjust the input source of the equivalent circuit model according to the content of the operating condition adjustment instruction.

[0128] Corresponding to the above method and system embodiments, the embodiments of the present invention also provide a train operation safety analysis device and a computer-readable storage medium, which can be mutually referenced with the above. The computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, the steps of the measurement method of transient electromagnetic radiation emission of the magnetic levitation system in any of the above embodiments are implemented. The computer-readable storage medium mentioned here includes random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, register, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the technical field.

[0129] The train operation safety analysis equipment may include:

[0130] Memory for storing computer programs;

[0131] A processor is used to execute a computer program to implement the steps of the train operation safety analysis method as in any of the above embodiments. The computer readable storage medium stores a computer program, and when the computer program is executed by the processor, the steps of the train operation safety analysis method as in any of the above embodiments are implemented.

[0132] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0133] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0134] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the technical solution and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A train operation safety analysis method, characterized in that: include: Establish an equivalent three-dimensional model of the train; Determining parameter information of a vehicle body equivalent circuit model at a target frequency by simulating the equivalent three-dimensional model; Establishing an equivalent circuit model of the train according to the parameter information; After setting the input source of the equivalent circuit model, determining the current distribution information in the equivalent circuit model; Injecting current into the equivalent three-dimensional model according to the current distribution information to determine the surface current distribution results of the train components, so as to perform the operation safety analysis of the train based on the surface current distribution results; The parameter information at least includes: a resistive component of the equivalent impedance of the bogie of the train; a capacitive component of the equivalent impedance of the bogie of the train; an inductive component of an equivalent impedance of a bogie of the train; Distributed capacitance of high-voltage transmission lines to the vehicle body; The equivalent circuit model includes: A power supply equivalent circuit in which the input end is connected to the pantograph and the output end is connected to the rail equivalent circuit; The rail equivalent circuit; Equivalent circuit of N car body frames connected in series; The distributed capacitance of K high-voltage transmission lines to the vehicle body, wherein the first ends of the distributed capacitance of K high-voltage transmission lines to the vehicle body are connected to the pantograph, and the second ends are respectively connected to the vehicle body frame equivalent circuits of the K vehicle bodies through which the high-voltage return line passes; M bogie grounding equivalent circuits connected to the rail equivalent circuit, wherein a first end of each bogie grounding equivalent circuit is connected to a corresponding car body frame equivalent circuit, and a second end of each bogie grounding equivalent circuit is connected to the rail equivalent circuit; Among them, N represents the number of car body frames of the train, K represents the number of car bodies through which the high-voltage return line passes, and M represents the number of circuit connections between the car body frame and the bogie.

2. The train operation safety analysis method according to claim 1, characterized in that: Each bogie grounding equivalent circuit includes: A first capacitor, a second capacitor, a first inductor and a first resistor are sequentially connected in series, and a first end of the first capacitor serves as a first end of the bogie grounding equivalent circuit, and a second end of the first resistor serves as a second end of the bogie grounding equivalent circuit; a second resistor connected in parallel with the first capacitor; an RL branch connected in parallel with the second capacitor, the RL branch comprising a second inductor and a third resistor connected in series with the second inductor; Among them, the first capacitor represents the coupling capacitance between adjacent car bodies, the second capacitor represents the capacitive component of the equivalent impedance of the bogie of the train, the first inductor represents the coupling inductance between adjacent car bodies, the first resistor represents the equivalent resistance of the grounding carbon brush, the second resistor represents the grounding resistance between the car body and the bogie, the second inductor represents the inductive component of the equivalent impedance of the bogie of the train, and the third resistor represents the resistive component of the equivalent impedance of the bogie of the train.

3. The train operation safety analysis method according to claim 1, characterized in that: The target frequency is a frequency selected from a preset high frequency range, and the high frequency range is 9 kHz to 30 MHz.

4. The train operation safety analysis method according to claim 1, characterized in that: The performing of the train operation safety analysis based on the surface current distribution result includes: The fault analysis of train components is carried out based on the surface current distribution results, and prompt information is output when the faulty component is determined.

5. The train operation safety analysis method according to any one of claims 1 to 4, characterized in that: Also includes: An operating condition adjustment instruction is received, and an input source of the equivalent circuit model is adjusted according to the content of the operating condition adjustment instruction.

6. A train operation safety analysis system, characterized in that: include: An equivalent three-dimensional model building module is used to build an equivalent three-dimensional model of the train; A parameter information determination module, used to determine parameter information of a vehicle body equivalent circuit model at a target frequency by simulating the equivalent three-dimensional model; An equivalent circuit model building module, used to build an equivalent circuit model of the train according to the parameter information; A current distribution information determination module, configured to determine current distribution information in the equivalent circuit model after setting an input source of the equivalent circuit model; An operation safety analysis module, used to inject current into the equivalent three-dimensional model according to the current distribution information, determine the surface current distribution results of the train components, and perform operation safety analysis of the train based on the surface current distribution results; The parameter information at least includes: a resistive component of the equivalent impedance of the bogie of the train; a capacitive component of the equivalent impedance of the bogie of the train; an inductive component of an equivalent impedance of a bogie of the train; Distributed capacitance of high-voltage transmission lines to the vehicle body; The equivalent circuit model includes: A power supply equivalent circuit in which the input end is connected to the pantograph and the output end is connected to the rail equivalent circuit; The rail equivalent circuit; Equivalent circuit of N car body frames connected in series; The distributed capacitance of K high-voltage transmission lines to the vehicle body, wherein the first ends of the distributed capacitance of K high-voltage transmission lines to the vehicle body are connected to the pantograph, and the second ends are respectively connected to the vehicle body frame equivalent circuits of the K vehicle bodies through which the high-voltage return line passes; M bogie grounding equivalent circuits connected to the rail equivalent circuit, wherein a first end of each bogie grounding equivalent circuit is connected to a corresponding car body frame equivalent circuit, and a second end of each bogie grounding equivalent circuit is connected to the rail equivalent circuit; Among them, N represents the number of car body frames of the train, K represents the number of car bodies through which the high-voltage return line passes, and M represents the number of circuit connections between the car body frame and the bogie.

7. A train operation safety analysis device, characterized in that: include: Memory for storing computer programs; A processor, configured to execute the computer program to implement the steps of the train operation safety analysis method as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the train operation safety analysis method as described in any one of claims 1 to 5 are implemented.

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