Lightning impulse test equipment and lightning impulse test system

Abstract

The utility model provides a lightning impulse test device and a lightning impulse test system, and relates to the field of lightning impulse tests, according to the scheme, a railway signal relay station under construction can be selected to carry out a lightning impulse test, only an iron tower and a machinery room blank house are arranged in the station, and no signal device needs to be installed in the room, so that the test cost is greatly reduced; on the premise that no test risk exists, communication iron tower lightning injection and reproduction of the coupling effect of the earth screen potential to the mechanical room can be achieved, and therefore the problems that in the prior art, the test timeliness is low, and the cost is high are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of lightning impact test, especially a lightning impact test equipment and lightning impact test system. BACKGROUND

[0002] Railway signal mechanical room is the command core place of railway control equipment, involves many equipment quantity, and the equipment integration degree and complexity are higher. In the process of dispatching railway, the sending and receiving of dispatching instructions are realized through relevant communication towers. Since the communication towers are generally higher than other surrounding buildings, they are easily damaged by direct lightning in thunderstorm weather, thereby causing the ground potential of the railway signal mechanical room to be instantaneously lifted, the generated high potential is coupled to the ground net of the nearby signal mechanical room, that is, "ground counterattack", thereby causing a high voltage to be generated at the port of the indoor signal equipment, and seriously damaging the equipment.

[0003] It is crucial to study the coupling law of "ground counterattack" to the signal mechanical room ground net, so as to design corresponding lightning protection measures. The existing solution usually selects a certain signal relay station that has been put into operation, adopts a voltage divider, a Rogowski coil and monitoring equipment, and carries out lightning ground potential of the tower ground net and the mechanical room ground net and lightning current monitoring on various grounding wires of the signal equipment. However, since lightning occurrence is random and occasional, the station may not have a communication tower flash for a long time, so that effective test data cannot be obtained, the timeliness is low, and the risk of never obtaining lightning test data is faced. At the same time, the monitoring equipment needs to be installed at a large number of stations, which is expensive. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model aims to provide a lightning impact test equipment and lightning impact test system, which can carry out lightning impact test at a railway signal relay station under construction. The station only contains a tower and a mechanical room rough house, and no signal equipment needs to be installed in the room, which greatly reduces the test cost and realizes the coupling effect reproduction of the communication tower lightning injection and the mechanical room ground potential under the premise of no test risk, thereby solving the problems of low test timeliness and high cost in the prior art.

[0005] In a first aspect, the utility model provides a lightning impact test equipment, which is used for lightning impact test on a mechanical room containing a communication tower.

[0006] The lightning impact test equipment comprises a voltage generating device, a current generating device and a convergence circuit. A plurality of grounding electrodes are arranged in the convergence circuit. One end of the grounding electrode is connected through a conductive line, and the other end of the grounding electrode is grounded.

[0007] The communication tower and the mechanical room are surrounded by the busbar loop; the bottom of the communication tower is provided with a tower grounding grid connected therewith, and the bottom of the mechanical room is provided with a mechanical room grounding grid connected therewith, and the tower grounding grid is connected with the mechanical room grounding grid;

[0008] The top of the communication tower is provided with an injection point connected with the high-voltage end of the current generating device through a lead wire; the low-voltage end of the current generating device is connected with the busbar loop.

[0009] The bottom of the communication tower is provided with a connection point connected with the voltage generating device through a voltage lead wire.

[0010] In an embodiment, the busbar loop is circular; wherein the center point between the communication tower and the mechanical room is the center of the circle, and the radius of the circle is not less than 50 meters.

[0011] In an embodiment, the conductive line is a copper braid.

[0012] In an embodiment, the voltage generating device comprises a voltage divider; wherein the high-voltage end of the voltage divider is connected with the connection point at the bottom of the communication tower through a voltage lead wire.

[0013] In an embodiment, the low-voltage end of the voltage divider is grounded at a remote position at least 100 meters away from the communication tower.

[0014] In an embodiment, the current generating device is provided with a Rogowski coil; wherein the Rogowski coil is sleeved on the lead wire.

[0015] In an embodiment, the voltage generating device comprises a first acquisition terminal; wherein the first acquisition terminal is connected with the signal output end of the voltage divider.

[0016] In an embodiment, the current generating device comprises a second acquisition terminal; wherein the second acquisition terminal is connected with the measurement end of the Rogowski coil.

[0017] In an embodiment, the first acquisition terminal and the second acquisition terminal are both provided with independent power supplies; and the first acquisition terminal and the second acquisition terminal are both provided with wireless communication modules.

[0018] In a second aspect, the utility model provides a lightning impulse test system, the lightning impulse test system comprises: a host computer and the lightning impulse test device mentioned in the first aspect; the lightning impulse test device comprises: a voltage generating device, a current generating device and a busbar loop;

[0019] The host computer is connected with the voltage generating device and the current generating device through a wireless network.

[0020] The utility model discloses a lightning impulse test equipment and lightning impulse test system, this lightning impulse test equipment is used to carry out lightning impulse test to the mechanical room including communication iron tower;The lightning impulse test equipment includes: voltage generating equipment, current generating equipment and confluence loop;Among them, a plurality of ground electrodes are arranged in the confluence loop, and one end of the ground electrode is connected through the conductive circuit ring, and the other end of the ground electrode is grounded;The communication iron tower and the mechanical room are all surrounded by the confluence loop;The bottom of the communication iron tower is provided with the iron tower ground net connected, and the bottom of the mechanical room is provided with the mechanical room ground net connected, and the iron tower ground net is connected with the mechanical room ground net;The top of the communication iron tower is provided with the injection point, and the injection point is connected with the high voltage end of the current generating equipment through the lead wire;The low voltage end of the current generating equipment is connected with the confluence loop;The bottom of the communication iron tower is provided with the connecting point, and the connecting point is connected with the voltage generating equipment through the voltage wire.The scheme can carry out lightning impulse test in the railway signal relay station under construction, and the station only contains the iron tower and the mechanical room rough house, and any signal equipment does not need to be installed in the room, which greatly reduces the test cost, realizes the coupling effect reproduction of the communication iron tower lightning injection and the mechanical room ground potential on the premise that there is no any test risk, thereby solve the problem that the test timeliness is lower and the cost is higher in the prior art.

[0021] Other features and advantages of the present application will be further described in the following specification, and some of them will become apparent from the specification, or will be understood through the practice of the present application. The objects and other advantages of the present application will be realized and achieved by the structure particularly indicated in the specification, claims and drawings.

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0024] Figure 1 The structure diagram of the lightning impulse test equipment provided by the embodiment of the present application is shown in the figure;

[0025] Figure 2 The structure diagram of another lightning impulse test equipment provided by the embodiment of the present application is shown in the figure;

[0026] Figure 3A structure schematic view of a lightning impulse test system is provided for the embodiment of the utility model.

[0027] Icon:

[0028] 10 - communication tower, 20 - mechanical room, 11 - tower ground net, 21 - mechanical room ground net, 12 - injection point, 13 - lead-in line, 14 - connection point, 15 - voltage lead;

[0029] 100 - voltage generating device, 110 - voltage divider, 120 - first acquisition terminal, 200 - current generating device, 210 - Rogowski coil, 220 - second acquisition terminal, 300 - convergence return circuit, 310 - grounding electrode, 320 - conductive circuit, 400 - upper computer. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme of the utility model will be described clearly and completely in combination with embodiments, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0031] Railway signal mechanical room is the command core place of railway control equipment, involves many equipment quantity, equipment integration and complexity are higher. In the process of dispatching railway, GSM-R needs to be set up communication tower close to mechanical room to realize the sending and receiving of dispatching instruction, because the height of communication tower is generally about 20 meters, is generally higher than the surrounding other buildings, is easy to suffer direct lightning damage in thunderstorm weather, thereby causing the ground net potential of railway signal mechanical room to lift instantaneously, the high potential generated is coupled to the ground net of nearby signal mechanical room, namely "ground counterattack", thereby causing the port of indoor signal equipment to produce higher voltage, and seriously causes equipment damage.

[0032] Studying the coupling patterns of ground strikes on the signal machinery room ground grid and designing appropriate lightning protection measures is crucial. Existing solutions typically select an already operational signal relay station and employ voltage dividers, Rogowski coils, and monitoring equipment to monitor the lightning ground potential of the tower and machinery room ground grids, as well as the lightning current on various grounding wires of signal equipment. However, due to the random and sporadic nature of lightning, the station may not experience lightning strikes on the communication tower for a long time, making it impossible to obtain valid test data. This results in low timeliness and the risk of never obtaining lightning test data. Furthermore, monitoring equipment needs to be installed at a wide range of sites, which is costly. Based on this, the present invention provides a lightning impulse test device and system that can be used to conduct lightning impulse tests at railway signal relay stations under construction. The station contains only a tower and a rough-hewn machinery room, eliminating the need for any signal equipment to be installed indoors. This significantly reduces testing costs and allows for the replication of lightning injection from the communication tower and the coupling effect of its ground grid potential onto the machinery room without any testing risks, thereby resolving the issues of low timeliness and high cost associated with existing testing techniques.

[0033] To facilitate understanding of this embodiment, a lightning impulse test device disclosed in an embodiment of the present utility model is first described in detail. Figure 1 As shown, the lightning impulse test equipment is used to perform lightning impulse testing on the mechanical room 20 containing the communication tower 10, including: a voltage generating device 100, a current generating device 200 and a bus circuit 300; wherein, a plurality of grounding electrodes 310 are provided in the bus circuit 300, one end of the grounding electrode 310 is looped through a conductive line 320, and the other end of the grounding electrode 310 is grounded.

[0034] The communication tower 10 and the machine room 20 are both surrounded by the convergence loop 300; a connected tower ground grid 11 is provided at the bottom of the communication tower 10, and a connected machine room ground grid 21 is provided at the bottom of the machine room 20, and the tower ground grid 11 is connected to the machine room ground grid 21.

[0035] An injection point 12 is provided on the top of the communication tower 10 , and the injection point 12 is connected to the high voltage end of the current generating device 200 through a lead wire 13 ; the low voltage end of the current generating device 200 is connected to the bus circuit 300 .

[0036] A connection point 14 is provided at the bottom of the communication tower 10 , and the connection point 14 is connected to the voltage generating device 100 via a voltage conductor 15 .

[0037] Specifically, the communication scaffolding 10 and the machine room 20 can be selected from the railway signal relay station under construction to carry out lightning impulse tests. The station only contains the communication scaffolding 10 and the machine room 20 rough-cut buildings, and no signal equipment is installed indoors, which does not pose any test risks.

[0038] This lightning impulse test equipment utilizes multiple grounding electrodes 310 and conductive lines 320 within a bus circuit 300 to construct a lightning impulse test circuit encompassing the communication tower 10 and the machinery room 20. This allows for the replication of the effects of lightning injection into the communication tower and its ground grid potential coupling to the machinery room. By measuring the lightning current injected into the top of the communication tower 10 and the lightning impulse ground potential of the tower 10 and machinery room 20 ground grids, the lightning current shunt on the horizontal equipotential connectors between the tower ground grid 11 and the machinery room ground grid 21, as well as the lightning impulse ground potential of the machinery room ground grid, is simultaneously measured. This mitigates the risk of high voltages being introduced into metallic electrical connections during testing, ensuring personal safety under high-voltage, high-current impulse test conditions.

[0039] Here is another lightning impulse test equipment, Figure 2 As shown, in one embodiment, the convergence loop 300 is a circular structure; wherein the center point between the communication tower 10 and the mechanical room 20 is the center of the circle, and the radius of the circle is not less than 50 meters.

[0040] In one embodiment, the conductive trace 320 is a braided copper wire.

[0041] In one embodiment, the voltage generating device 100 includes a voltage divider 110 ; wherein the high voltage end of the voltage divider 110 is connected to a connection point at the bottom of the communication tower 10 via a voltage conductor 15 .

[0042] In one embodiment, the low voltage end of the voltage divider 110 is grounded at a remote location at least 100 meters away from the communication tower 10 .

[0043] In one embodiment, a Rogowski coil 210 is provided in the current generating device 200 , wherein the Rogowski coil 210 is sleeved on the lead wire 13 .

[0044] In one embodiment, the voltage generating device 100 includes a first acquisition terminal 120 ; wherein the first acquisition terminal 120 is connected to the signal output end of the voltage divider 110 .

[0045] In one embodiment, the current generating device 200 includes a second acquisition terminal 220 ; wherein the second acquisition terminal 220 is connected to the measuring end of the Rogowski coil 210 .

[0046] In one embodiment, the first acquisition terminal 120 and the second acquisition terminal 220 are both equipped with independent power supplies; and the first acquisition terminal 120 and the second acquisition terminal 220 are both equipped with wireless communication modules.

[0047] In this embodiment, the system consisting of the communication tower 10 and the machinery room 20 is the center. Several grounding electrodes 310 are evenly distributed around a circle with a radius of 50 meters, at a depth of at least 1 meter. A busbar loop 300 composed of braided copper tape connects all grounding electrodes 310, forming a busbar system. A mobile impulse current generator (current generating device 200) is connected to the top of the communication tower 10 via lead wires 13. The low-voltage terminal of the current generating device 200 is connected to the braided copper tape via a connecting wire. This forms an experimental circuit consisting of the current generating device 200, lead wires 13, the communication tower 10, and the busbar loop 300.

[0048] The process of performing lightning transient testing using lightning impulse test equipment includes voltage testing and current testing. The voltage test requires driving a grounding electrode into the ground at a remote end about 100 meters away as a reference zero potential point, with a depth of not less than 1m. The high-voltage end of the voltage divider 110 is connected to the bottom of the communication tower 10, the low-voltage end of the voltage divider 110 is connected to the remote reference ground, and the signal output end of the voltage divider 110 is connected to the first acquisition terminal 120.

[0049] The current test directly uses the Rogowski coil 210 in the current generating device 200 as a current sensor to measure the current injected into the lead wire 13. This current is then collected and stored via the second acquisition terminal 220. Both the first acquisition terminal 120 and the second acquisition terminal 220 have built-in independent power supplies, enabling independent power supply. Both the first acquisition terminal 120 and the second acquisition terminal 220 are equipped with wireless communication modules, which transmit voltage and current signals via a wireless network to a host computer for display.

[0050] It can be seen from the lightning impulse test equipment provided in the embodiment of the present invention that this solution can select a railway signal relay station under construction to carry out lightning impulse tests. The station only contains an iron tower and a rough-cut mechanical room, and no signal equipment needs to be installed indoors, which greatly reduces the test cost. The lightning injection of the communication tower and the coupling effect of its ground grid potential to the mechanical room can be reproduced without any test risks, thereby solving the problems of low test timeliness and high cost in the existing technology.

[0051] The present invention provides a lightning impulse test system. Figure 3 As shown, the lightning impulse test system includes: a host computer 400 and the lightning impulse test equipment mentioned in the above embodiment; the lightning impulse test equipment includes: a voltage generating device, a current generating device and a bus circuit; wherein, the host computer 400 is connected to the voltage generating device and the current generating device respectively through a wireless network.

[0052] The lightning impulse test device in the lightning impulse test system provided by the embodiment of the utility model has the same implementation principle and technical effects as the aforementioned lightning impulse test device embodiment, and for brevity of description, the part of the device embodiment not mentioned can refer to the corresponding content in the aforementioned embodiment.

[0053] In several embodiments provided in the present application, it should be understood that the disclosed system and device can be implemented in other manners. The above described device embodiments are only schematic, for example, the division of the units is only a logical function division, and there can be another division manner in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between different units can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0054] The units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0055] In addition, each functional unit in each embodiment of the utility model can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0056] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a non-volatile computer readable storage medium executable by a processor. Based on this understanding, the technical scheme of the utility model essentially or the part that contributes to the prior art or part of the technical scheme can be embodied in the form of a software product, which is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the utility model. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program code storage media.

[0057] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed by the present invention, or replace some of the technical features therein with equivalents. Such modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A lightning impulse test equipment, characterized in that, The lightning impulse test equipment is used to perform lightning impulse testing on a machine room containing a communication tower; The lightning impulse test equipment includes: a voltage generating device, a current generating device and a bus circuit; wherein the bus circuit is provided with a plurality of grounding electrodes, one end of each grounding electrode is connected by a conductive line, and the other end of each grounding electrode is grounded; The communication tower and the machine room are both surrounded by the convergence loop; a tower grounding network is provided at the bottom of the communication tower, and a machine room grounding network is provided at the bottom of the machine room, and the tower grounding network is connected to the machine room grounding network; An injection point is provided on the top of the communication tower, and the injection point is connected to the high-voltage end of the current generating device through a lead wire; the low-voltage end of the current generating device is connected to the bus circuit; A connection point is provided at the bottom of the communication tower, and the connection point is connected to the voltage generating device through a voltage conductor.

2. The lightning impulse test equipment according to claim 1, characterized in that: The convergence loop is circular; wherein the center point between the communication tower and the mechanical room is the center of the circle, and the radius of the circle is not less than 50 meters.

3. The lightning impulse test equipment according to claim 1, characterized in that: The conductive circuit is a copper braided wire.

4. The lightning impulse test equipment according to claim 1, characterized in that: The voltage generating device includes a voltage divider; wherein the high-voltage end of the voltage divider is connected to the connection point at the bottom of the communication tower through the voltage conductor.

5. The lightning impulse test equipment according to claim 4, characterized in that: The low-voltage end of the voltage divider is grounded to a remote location at least 100 meters away from the communication tower.

6. The lightning impulse test equipment according to claim 4, characterized in that: The current generating device is provided with a Rogowski coil, wherein the Rogowski coil is sleeved on the lead wire.

7. The lightning impulse test equipment according to claim 6, characterized in that: The voltage generating device includes a first acquisition terminal; wherein the first acquisition terminal is connected to the signal output end of the voltage divider.

8. The lightning impulse test equipment according to claim 7, characterized in that: The current generating device comprises a second acquisition terminal; wherein the second acquisition terminal is connected to the measuring end of the Rogowski coil.

9. The lightning impulse test equipment according to claim 8, characterized in that: The first acquisition terminal and the second acquisition terminal are both equipped with independent power supplies; the first acquisition terminal and the second acquisition terminal are both equipped with wireless communication modules.

10. A lightning impulse test system, characterized in that: The lightning impulse test system comprises: a host computer and the lightning impulse test equipment according to any one of claims 1 to 9; the lightning impulse test equipment comprises: a voltage generating device, a current generating device and a bus circuit; The host computer is connected to the voltage generating device and the current generating device respectively via a wireless network.

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