A simulation device and equipment for multi-path breakdown of maglev trains

Abstract

The present invention discloses a simulation device and equipment for multi-path breakdown of a maglev train in an embodiment of the present invention, including a lightning generator, a track capacitance model, a voltage divider, and a collector. Among them, the track capacitance model includes a vehicle body part, a grounding wire part, and a guiding electromagnet part. The positive pole of the lightning generator is connected to the vehicle body part of the track capacitance model, and the negative pole is connected to the grounding wire part. Multiple breakdown paths are formed in the track capacitance model. The input end of the voltage divider is connected to the position to be measured corresponding to the breakdown path in the track capacitance model; the collector is connected to the output end of the voltage divider; the lightning generator is used to inject a lightning current signal into the vehicle body part of the track capacitance model; the collector is used to collect the breakdown voltage at the position to be measured through the voltage divider; the present invention can obtain the breakdown voltages at different breakdown paths under different lightning current signals, so as to study the relevant factors affecting the lightning discharge path, which is beneficial to providing a theoretical basis for improving the lightning protection of maglev trains.

Description

Technical Field

[0001] The present invention relates to the technical field of maglev trains, and particularly to a simulation device and equipment for multi-path breakdown of maglev trains. Background Art

[0002] When a maglev train runs at high speed, it has no contact with the wheel-rail. Its grounding structure is very different from that of ordinary wheel-rail trains. The guide electromagnet plate and the guide rail plate form a rail capacitance with air as the medium. Therefore, when a maglev train runs along an elevated line, the law shown when it is struck by direct lightning is different from that of ordinary wheel-rail trains.

[0003] When a maglev train is struck by direct lightning, the air between the guide electromagnet and the guide track is broken down, and the broken-down place will become a lightning discharge path. At this time, the discharge path can be approximately regarded as a series model of a resistor and an inductor. In real life, lightning current has the characteristics of large amplitude and large current change rate. Excessive discharge current amplitude and rapid change of di / dt will cause the potential of the guide electromagnet to the guide rail to be lifted, and in severe cases, it will cause re-breakdown, and then generate a second or even more lightning current discharge paths.

[0004] The number of lightning discharge paths is closely related to the overvoltage characteristics of the vehicle body during lightning strikes. When a maglev train is struck by lightning, the discharge paths can be established more quickly, which can effectively suppress the overvoltage of the vehicle body during lightning strikes. At present, there is no research on the factors affecting the lightning discharge path, and there is a lack of theoretical basis for lightning protection of maglev trains.

[0005] In view of this, how to provide a simulation device and equipment for multi-path breakdown of maglev trains has become a problem to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of the embodiments of the present invention is to provide a simulation device and equipment for multi-path breakdown of maglev trains, which can study the factors affecting the lightning discharge path during use, and is beneficial to providing a theoretical basis for improving the lightning protection of maglev trains.

[0007] To solve the above technical problems, the embodiments of the present invention provide a simulation device for multi-path breakdown of maglev trains, including: a lightning generator, a rail capacitance model, a voltage divider, and a collector. Among them, the rail capacitance model includes a vehicle body part, a grounding wire part, and a guide electromagnet part. The positive electrode of the lightning generator is connected to the vehicle body part of the rail capacitance model, and the negative electrode is connected to the grounding wire part. Multiple breakdown paths are formed in the rail capacitance model. The input end of the voltage divider is connected to the position to be measured corresponding to the breakdown path in the rail capacitance model; the collector is connected to the output end of the voltage divider;

[0008] The lightning generator is used to inject a lightning current signal into the vehicle body part of the on-rail capacitance model;

[0009] The collector is used to collect the breakdown voltage at the position to be measured through the voltage divider.

[0010] Optionally, the on-rail capacitance model includes a plurality of single-module on-rail capacitances. The single-module on-rail capacitance includes a vehicle body sub-part, a grounding wire sub-part, and a guiding electromagnet sub-part. The vehicle body sub-part is connected to the guiding electromagnet sub-part, and the guiding electromagnet sub-part of a previous single-module on-rail capacitance is connected to the vehicle body sub-part of another adjacent single-module on-rail capacitance.

[0011] Optionally, the vehicle body sub-part includes a first transverse metal plate and a longitudinal metal strip perpendicularly connected to one end of the transverse metal plate. The guiding electromagnet sub-part is a second transverse metal plate parallel to the first transverse metal plate, and the grounding wire sub-part is a third transverse metal plate parallel to the first transverse metal plate; the longitudinal metal strip is connected to the third transverse metal plate through a first inductor;

[0012] The third transverse metal plate of the single-module on-rail capacitance is connected to the longitudinal metal strip of another adjacent single-module on-rail capacitance through a second inductor.

[0013] Optionally, the inductance value of the first inductor and / or the second inductor is 1.17 μH.

[0014] Optionally, it further includes an inductor coil. For the single-module on-rail capacitance to be detected, the vehicle body sub-part in the single-module on-rail capacitance is connected to the grounding wire sub-part through the inductor coil.

[0015] Optionally, the inductance value of the inductor coil is 6.7 μH.

[0016] Optionally, the lightning generator is connected to the vehicle body part of the on-rail capacitance model through a discharge electrode.

[0017] Optionally, the collector is an oscilloscope.

[0018] An embodiment of the present invention provides a simulation device for multi-path breakdown of a maglev train, including the simulation device for multi-path breakdown of a maglev train as described above.

[0019] In an embodiment of the present invention, a simulation device and equipment for multi-path breakdown of a maglev train are provided, including: a lightning generator, a track-to-rail capacitance model, a voltage divider, and a collector. Among them, the track-to-rail capacitance model includes a vehicle body part, a ground wire part, and a guide electromagnet part. The positive pole of the lightning generator is connected to the vehicle body part of the track-to-rail capacitance model, and the negative pole is connected to the ground wire part. Multiple breakdown paths are formed in the track-to-rail capacitance model. The input end of the voltage divider is connected to the position to be measured corresponding to the breakdown path in the track-to-rail capacitance model; the collector is connected to the output end of the voltage divider; the lightning generator is used to inject a lightning current signal into the vehicle body part of the track-to-rail capacitance model; the collector is used to collect the breakdown voltage at the position to be measured through the voltage divider.

[0020] It can be seen that in the embodiment of the present invention, a track-to-rail capacitance model is set, and a lightning current signal is injected into the vehicle body part of the track-to-rail capacitance model through the positive pole of the lightning generator. Under the impact of the lightning current signal, multiple breakdown paths will be formed in the track-to-rail capacitance model. The voltage divider divides the voltage at the position to be measured corresponding to the breakdown path in the track-to-rail capacitance module and transmits it to the collector, and the collector collects the breakdown voltage; thus, the breakdown voltages at different breakdown paths under different lightning current signals can be obtained, so as to study the relevant factors affecting the lightning discharge path, which is beneficial to providing a theoretical basis for improving the lightning protection of maglev trains. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the prior art and the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic structural diagram of a simulation device for multi-path breakdown of a maglev train provided by an embodiment of the present invention;

[0023] Figure 2 It is a schematic structural diagram of a single-module track-to-rail capacitance provided by an embodiment of the present invention;

[0024] Figure 3 It is a top view schematic diagram of a vehicle body sub-part a provided by an embodiment of the present invention;

[0025] Figure 4 It is a schematic structural diagram of another simulation device for multi-path breakdown of a maglev train provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The embodiment of the present invention provides a simulation device and equipment for multi-path breakdown of maglev trains, which can study the relevant factors affecting the lightning discharge path during use and is beneficial to providing a theoretical basis for improving the lightning protection of maglev trains.

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figure 1 , Figure 1 , which is a schematic structural diagram of a simulation device for multi-path breakdown of maglev trains provided by the embodiment of the present invention. The simulation device includes: a lightning generator 1, a track capacitance model 2, a voltage divider 3, and a collector 4. Among them, the track capacitance model 2 includes a vehicle body part 21, a grounding wire part 22, and a guiding electromagnet part 23. The positive pole of the lightning generator 1 is connected to the vehicle body part 21 of the track capacitance model 2, and the negative pole is connected to the grounding wire part 23. Multiple breakdown paths are formed in the track capacitance model 2. The input end of the voltage divider 3 is connected to the position to be measured corresponding to the breakdown path in the track capacitance model 2; the collector 4 is connected to the output end of the voltage divider 3;

[0029] The lightning generator 1 is used to inject a lightning current signal into the vehicle body part 21 of the track capacitance model 2;

[0030] The collector 4 is used to collect the breakdown voltage at the position to be measured through the voltage divider 3.

[0031] It should be noted that the specific parameters (such as inductance, resistance, etc.) of the vehicle body part 21, the grounding wire part 22, and the guiding electromagnet part 23 in the on-rail capacitance model 2 in the embodiments of the present invention are respectively designed according to the actual parameters of the vehicle body, the guiding electromagnet, and the sliding rail in the maglev train. Among them, the distributed capacitance of the vehicle body relative to the ground is formed between the vehicle body part 21 and the grounding wire part 22, and the distributed capacitance of the guiding electromagnet and the ground is formed between the guiding electromagnet part 23 and the grounding wire 22. The positive pole of the lightning generator 1 is connected to the top of the vehicle body part 21 in the on-rail capacitance model 2 for injecting a lightning current signal into the on-rail capacitance model 2. Under the impact of the lightning current signal, multiple breakdown paths will be formed in the on-rail capacitance model 2. The detection positions corresponding to the breakdown paths can be determined in advance, and the collector 4 can collect the breakdown voltage at the detection positions through the voltage divider 3. In addition, in practical applications, the number and detection positions of the voltage dividers can be arranged according to needs and the detection positions corresponding to each of the multiple breakdown paths. In addition, the same lightning current signal can be injected into the vehicle body part 21 multiple times, and a measurement position is determined each time. By changing the measurement position of the voltage divider, the breakdown voltage at the detection position corresponding to each breakdown path can be obtained.

[0032] Furthermore, the on-rail capacitance model 2 includes a plurality of single-module on-rail capacitances A. The single-module on-rail capacitance includes a vehicle body sub-part a, a grounding wire sub-part b, and a guiding electromagnet sub-part c. The vehicle body sub-part a is connected to the guiding electromagnet sub-part c, and the guiding electromagnet sub-part c of the previous single-module on-rail capacitance A is connected to the vehicle body sub-part a of another adjacent single-module on-rail capacitance A.

[0033] Specifically, in practical applications, the maglev train can be divided into multiple segments, which are divided into three segments from the head to the tail. Among them, each segment corresponds to a single-module on-rail capacitance A. For example Figure 2 as shown, each single-module on-rail capacitance A includes a vehicle body sub-part a, a grounding wire sub-part b, and a guiding electromagnet sub-part c, and the specific parameters (such as inductance, resistance, etc.) of the vehicle body sub-part a, the grounding wire sub-part b, and the guiding electromagnet sub-part c in each single-module on-rail capacitance A are set according to the specific parameters of the vehicle body, the sliding rail, and the guiding electromagnet in this segment of the actual maglev train.

[0034] More specifically, please also refer to Figure 2, the vehicle body sub - part a includes a first transverse metal plate a1 and a longitudinal metal strip a2 perpendicularly connected to one end of the first transverse metal plate a1. The guiding electromagnet sub - part c is a second transverse metal plate c1 arranged parallel to the first transverse metal plate a1, and the grounding wire sub - part b is a third transverse metal plate b1 arranged parallel to the first transverse metal plate a1; the longitudinal metal strip a2 and the third transverse metal plate b1 are connected by a first inductor B; the third transverse metal plate of each single - module pair - rail capacitor A and the longitudinal metal strip of another adjacent single - module pair - rail capacitor are connected by a second inductor C.

[0035] It should be noted that the inductance value of the first inductor B and / or the second inductor C is 1.17 μH, and specifically it can be an inductor wire. And for the single - module pair - rail capacitor A to be detected, the vehicle body sub - part a in the single - module pair - rail capacitor A is connected to the grounding wire sub - part b through an inductor coil D. In practical applications, the inductance value of the inductor coil D is 6.7 μH. The lightning current generator can specifically be connected to the vehicle body sub - part a of one of the single - module pair - rail capacitors A. And when the lightning generator 1 injects a lightning current signal into the vehicle body sub - part a through its positive electrode, the lightning current signal can be transmitted to the guiding electromagnet sub - part c connected to it through the first inductor connected to the vehicle body sub - part a, and the gap between the guiding electromagnet sub - part c and the grounding wire sub - part b is broken down to discharge, thus forming a loop through the negative electrode of the lightning generator 1. In addition, the vehicle body sub - part a in the single - module pair - rail capacitor A is connected to the grounding wire sub - part b through a 6.7 - μH inductor coil to simulate the discharge between the vehicle body sub - part a and the ground.

[0036] Among them, the top - view schematic diagram of the vehicle body sub - part a in the embodiment of the present invention is as Figure 3 shown, where the contact point O on the first transverse metal plate a1 is the connection point between the discharge electrode 5 and the first transverse metal plate a1.

[0037] It can be understood that in practical applications, a 6.7 - μH inductor coil can be connected in series between the vehicle body sub - part a and the grounding wire sub - part b through a wire. The connection point of the wire and the vehicle body sub - part a can be the pre - drilled position of the first transverse metal plate a1 and the longitudinal metal strip a2, and the connection method can be screw fixation to simulate the breakdown path of the lightning current; using a 1.17 - μH equivalent grounding wire as an inductor to connect the third transverse metal plate of the single - module pair - rail capacitor A and the longitudinal metal strip of another adjacent single - module pair - rail capacitor. Holes can be pre - set on the longitudinal metal strip, and screw fixation is used. In addition, a copper nose is arranged on the surface of the guiding electromagnet sub - part c in the embodiment of the present invention, and the connection method can be to weld the wire to the copper nose.

[0038] It should also be noted that, please refer to Figure 4, in the embodiment of the present invention, the collector 4 may specifically but not limited to be an oscilloscope, and the lightning generator 1 is connected to the car body part 21 of the counter-rail capacitance model 2 through the discharge electrode 5. That is, when the lightning generator 1 in the embodiment of the present invention discharges to the car body part 21 of the counter-rail capacitance model 2, it can discharge through the discharge electrode 5. The Rogowski coil is directly sleeved into the wire of the negative electrode of the lightning generator 1 and is close to the negative terminal port, and the integrator output cable is directly connected to the oscilloscope channel.

[0039] It can be seen that in the embodiment of the present invention, a counter-rail capacitance model is set, and a lightning current signal is injected into the car body part of the counter-rail capacitance model through the positive electrode of the lightning generator. Under the impact of the lightning current signal, multiple breakdown paths will be formed in the counter-rail capacitance model. The voltage divider divides the voltage at the position to be measured corresponding to the breakdown path in the counter-rail capacitance module and then transmits it to the collector, and the collector collects the breakdown voltage; thus, the breakdown voltages at different breakdown paths under different lightning current signals can be obtained, so as to study the relevant factors affecting the lightning discharge path, which is beneficial to providing a theoretical basis for improving the lightning protection of maglev trains.

[0040] On the basis of the above embodiment, the embodiment of the present invention provides a simulation device for multi-path breakdown of a maglev train, including the simulation device for multi-path breakdown of a maglev train as described above.

[0041] It should be noted that the simulation device for multi-path breakdown of a maglev train in the embodiment of the present invention has the same beneficial effects as the simulation device for multi-path breakdown of a maglev train provided in the above embodiment, and for the specific introduction of the simulation device for multi-path breakdown of a maglev train involved in the embodiment of the present invention, please refer to the above embodiment. The present invention will not be repeated here.

[0042] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same and similar parts among the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0043] It should also be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0044] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A simulation device for multi-path breakdown of a maglev train, characterized in that, Comprising: A lightning generator, an on-rail capacitance model, a voltage divider, and a collector. Among them, the on-rail capacitance model includes a vehicle body part, a grounding wire part, and a guiding electromagnet part. The positive electrode of the lightning generator is connected to the vehicle body part of the on-rail capacitance model, and the negative electrode is connected to the grounding wire part. Multiple breakdown paths are formed in the on-rail capacitance model. The input end of the voltage divider is connected to the position to be measured corresponding to the breakdown path in the on-rail capacitance model; the collector is connected to the output end of the voltage divider; The lightning generator is used to inject a lightning current signal into the vehicle body part of the on-rail capacitance model; The collector is used to collect the breakdown voltage at the position to be measured through the voltage divider; where: The specific parameters of the vehicle body part, the grounding wire part, and the guiding electromagnet part are respectively designed according to the actual parameters of the vehicle body, the guiding electromagnet, and the sliding rail in the maglev train; The lightning generator is used to inject the same kind of lightning current signal into the vehicle body part of the on-rail capacitance model multiple times. Each time, a position to be measured is determined. By changing the measurement position of the voltage divider, the breakdown voltage at the position to be detected corresponding to each breakdown path is obtained; The on-rail capacitance model includes multiple single-module on-rail capacitances. The single-module on-rail capacitance includes a vehicle body sub-part, a grounding wire sub-part, and a guiding electromagnet sub-part. The vehicle body sub-part is connected to the guiding electromagnet sub-part. The guiding electromagnet sub-part of the previous single-module on-rail capacitance is connected to the vehicle body sub-part of another adjacent single-module on-rail capacitance. Among them, the maglev train is pre-divided into multiple segments, and one single-module on-rail capacitance corresponds to one segment of the maglev train; The vehicle body sub-part includes a first transverse metal plate and a longitudinal metal strip perpendicularly connected to one end of the transverse metal plate. The guiding electromagnet sub-part is a second transverse metal plate parallel to the first transverse metal plate. The grounding wire sub-part is a third transverse metal plate parallel to the first transverse metal plate; the longitudinal metal strip is connected to the third transverse metal plate through a first inductor; The second transverse metal plate of the single-module on-rail capacitance is connected to the longitudinal metal strip of another adjacent single-module on-rail capacitance through a second inductor; It also includes an inductor coil. For the single-module on-rail capacitance to be detected, the vehicle body sub-part in the single-module on-rail capacitance connects the inductor coil in series between the vehicle body sub-part and the grounding wire sub-part through a wire, so that the vehicle body sub-part is connected to the grounding wire sub-part through the inductor coil; the connection position of the wire and the vehicle body sub-part can be the pre-drilled position of the first transverse metal plate and the longitudinal metal strip, and its connection method is to use screw fixation; The inductance value of the first inductor and / or the second inductor is 1.17 μH; the inductance value of the inductor coil is 6.7 μH.

2. The simulation device for multi-path breakdown of a maglev train according to claim 1, characterized in that The lightning generator is connected to the vehicle body part of the on-rail capacitance model through a discharge electrode.

3. The simulation device for multi-path breakdown of maglev trains according to claim 2, characterized in that The collector is an oscilloscope.

4. A simulation device for multi-path breakdown of a maglev train, characterized in that, Including the simulation device for multi-path breakdown of the maglev train as described in any one of claims 1 to 3.

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