Ultrahigh-voltage cable discharge audio detection device

Abstract

The utility model discloses an ultrahigh-voltage cable discharge audio detection device, and relates to the technical field of railway vehicles. The power supply end is connected with the input end of the test transformer; the output end of the analog main transformer is provided with an analog load resistor; one end of the protection resistor is connected with the first pin of the output end of the test transformer, and the other end of the protection resistor is connected with the first pin of the input end of the test transformer; one end of the first connecting cable is connected with a second pin of the output end of the test transformer; one end of the second connecting cable is connected with a second pin of the input end of the test transformer, and the free ends of the first connecting cable and the second connecting cable are arranged at intervals to form a to-be-tested space for connecting a to-be-tested cable; and a plurality of audio acquisition devices arranged around the to-be-tested space. The working condition of the to-be-tested cable is detected, the detection efficiency is effectively improved, and the rail vehicle simulation test requirement is met.

Description

Technical Field

[0001] This application relates to the field of rail vehicle technology, specifically to an ultra-high voltage cable discharge audio detection device. Background Technology

[0002] Currently, during service, the ultra-high voltage cables on train roofs are prone to discharge problems due to construction techniques, environmental influences, and accidental factors, affecting train safety and causing adverse effects on vehicle operation. Therefore, using audio detection methods to detect cable discharge has gained widespread application in the field due to its convenience, ease of operation, and high repeatability. However, at present, a reliable and easy-to-operate audio detection technology is still lacking.

[0003] Therefore, to meet practical needs, an ultra-high voltage cable discharge audio detection device is provided. Summary of the Invention

[0004] In view of the deficiencies in the existing technology, the purpose of this application is to provide an ultra-high voltage cable discharge audio detection device, which uses a set circuit and an audio acquisition device to detect the working condition of the cable under test, effectively improving the detection efficiency and meeting the needs of railway vehicle simulation testing.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] This application provides a discharge audio detection device for ultra-high voltage cables, the ultra-high voltage cable discharge audio detection device comprising:

[0007] Power supply end;

[0008] A test transformer, wherein the power supply terminal is connected to the input terminal of the test transformer;

[0009] A simulated main transformer, wherein a simulated load resistor is configured at the output terminal of the simulated main transformer;

[0010] A protective resistor, one end of which is connected to the first pin of the output terminal of the test transformer, and the other end of which is connected to the first pin of the input terminal of the test transformer;

[0011] A first connecting cable, one end of which is connected to the second pin of the output terminal of the test transformer;

[0012] The second connecting cable has one end connected to the second pin of the input terminal of the test transformer. The free ends of the first connecting cable and the second connecting cable are arranged at intervals to form a test space for the cable to be tested to connect.

[0013] Multiple audio acquisition devices are arranged around the space to be tested;

[0014] The test transformer, the simulated main transformer, the simulated load resistor, the protection resistor, the first connecting cable, the second connecting cable, and the space to be tested are all located in a preset shielded room.

[0015] Based on the above technical solution, the device further includes:

[0016] A partial discharge tester electrically connected to the first connecting cable is used to control the pass voltage of the cable under test.

[0017] Based on the above technical solution, the device further includes:

[0018] A data acquisition system that is signal-connected to each of the aforementioned audio acquisition devices.

[0019] Based on the above technical solution, the device further includes:

[0020] The distribution cabinet is electrically connected to the power supply terminal and the test transformer.

[0021] Based on the above technical solution, the number of audio acquisition devices is 4, and they are evenly distributed around the periphery of the space to be tested.

[0022] Compared with the prior art, the advantages of this application are:

[0023] This application utilizes a set circuit and an audio acquisition device to detect the working condition of the cable under test, effectively improving the detection efficiency and meeting the needs of railway vehicle simulation testing. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of an ultra-high voltage cable discharge audio detection device according to an embodiment of this application;

[0026] Figure 2 This is an assembly diagram of an ultra-high voltage cable discharge audio detection device according to an embodiment of this application;

[0027] In the picture:

[0028] 1. Power supply end; 2. Test transformer; 3. Simulated main transformer; 4. Simulated load resistor; 5. Protection resistor; 6. First connecting cable; 7. Second connecting cable; 8. Audio acquisition device; 9. Partial discharge tester; 10. Data acquisition system; 11. Distribution cabinet; A. Space under test; B. Shielded room. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] The embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0031] This application provides an ultra-high voltage cable discharge audio detection device, which uses a set circuit and an audio acquisition device to detect the working condition of the cable under test, effectively improving the detection efficiency and meeting the needs of railway vehicle simulation testing.

[0032] To achieve the aforementioned technical effects, the overall concept of this application is as follows:

[0033] An ultra-high voltage cable discharge audio detection device, comprising:

[0034] Power supply terminal 1;

[0035] Test transformer 2, wherein the power supply terminal 1 is connected to the input terminal of the test transformer 2;

[0036] A simulated main transformer 3 is provided, and a simulated load resistor 4 is configured at the output terminal of the simulated main transformer 3.

[0037] A protective resistor 5, one end of which is connected to the first pin of the output terminal of the test transformer 2, and the other end of which is connected to the first pin of the input terminal of the test transformer 2;

[0038] A first connecting cable 6, one end of which is connected to the second pin of the output terminal of the test transformer 2;

[0039] The second connecting cable 7 has one end connected to the second pin of the input terminal of the test transformer 2. The free ends of the first connecting cable 6 and the second connecting cable 7 are arranged at intervals to form a test space A for the cable to be tested to connect.

[0040] Multiple audio acquisition devices 8 are arranged around the space A to be tested;

[0041] The test transformer 2, the simulated main transformer 3, the simulated load resistor 4, the protection resistor 5, the first connecting cable 6, the second connecting cable 7, and the space to be tested A are all located in a preset shielded room B.

[0042] The embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0043] See Figures 1-2 As shown in the figure, this application provides an ultra-high voltage cable discharge audio detection device, which includes:

[0044] Power supply terminal 1;

[0045] Test transformer 2, wherein the power supply terminal 1 is connected to the input terminal of the test transformer 2;

[0046] A simulated main transformer 3 is provided, and a simulated load resistor 4 is configured at the output terminal of the simulated main transformer 3.

[0047] A protective resistor 5, one end of which is connected to the first pin of the output terminal of the test transformer 2, and the other end of which is connected to the first pin of the input terminal of the test transformer 2;

[0048] A first connecting cable 6, one end of which is connected to the second pin of the output terminal of the test transformer 2;

[0049] The second connecting cable 7 has one end connected to the second pin of the input terminal of the test transformer 2. The free ends of the first connecting cable 6 and the second connecting cable 7 are arranged at intervals to form a test space A for the cable to be tested to connect.

[0050] Multiple audio acquisition devices 8 are arranged around the space A to be tested;

[0051] The test transformer 2, the simulated main transformer 3, the simulated load resistor 4, the protection resistor 5, the first connecting cable 6, the second connecting cable 7, and the space to be tested A are all located in a preset shielded room B.

[0052] In this embodiment, a set circuit and an audio acquisition device are used to detect the working condition of the cable under test, which effectively improves the detection efficiency and meets the needs of railway vehicle simulation testing.

[0053] Furthermore, the device also includes:

[0054] The partial discharge tester 9, which is electrically connected to the first connecting cable 6, is used to control the through voltage of the cable under test.

[0055] Furthermore, the device also includes:

[0056] A data acquisition system 10 is connected to each of the audio acquisition devices 8 via signal transmission.

[0057] Furthermore, the device also includes:

[0058] The power distribution cabinet 11 is electrically connected to the power supply terminal 1 and the test transformer 2.

[0059] Furthermore, there are four audio acquisition devices 8, which are evenly distributed around the periphery of the space to be tested A.

[0060] The technical solution based on the embodiments of this application is as follows:

[0061] As shown in the attached diagram of the instruction manual. Figure 1 As shown, at power supply end 1, normal 380V AC power enters shielded room B, and after passing through test transformer 2, it obtains the 27.5kV high voltage power required for the test. After passing through protective resistor 5, it is applied to the first connecting cable 6, the second connecting cable 7, and the cable under test. After passing through simulated main transformer 3, the high voltage power is converted into normal 220V power frequency voltage. By adding simulated load resistor 4, the normal vehicle current condition is simulated. The audio acquisition device 8 is placed in area A corresponding to the cable end position in the figure. In the control room, the voltage through the cable under test is adjusted by partial discharge tester 9. The data acquisition system 10 is used to record the sound pressure signal.

[0062] For ease of illustration, the cable under test is in Figure 1 The middle label is C.

[0063] The distribution cabinet 11 is connected to the power supply terminal 1 and the test transformer 2 for regulation.

[0064] Four microphone sensors are placed inside the audio acquisition device 8 to collect the working audio of the cable under test. The microphones are placed inside the audio acquisition device 8 to avoid interference from other noises in the partial discharge room, and at the same time to ensure that the microphone in each audio acquisition device 8 only collects the audio at the corresponding cable end.

[0065] The audio acquisition device 8 mainly consists of two parts: a front horn-shaped housing to shield external noise, four holes at the front of the housing for the microphone to collect discharge noise from the cable end, and a round hole at the rear flat plate so that the cable under test can pass through, ensuring that the cable end is completely placed inside the audio acquisition device 8.

[0066] Based on the ultra-high voltage cable discharge audio detection device provided in this application embodiment, the voltage and current conditions on the high voltage cable under normal vehicle conditions can be replicated to simulate real working conditions. By collecting audio from the end of the working cable, and through audio analysis, data processing, and finally determining whether there is a discharge problem in the cable, the device simulates the real working conditions of the cable under the vehicle and, in conjunction with the audio analysis work, continuously optimizes the audio analysis program and analysis method, providing strong technical support for the field.

[0067] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0068] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0069] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. 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 this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A discharge audio detection device for ultra-high voltage cables, characterized in that, The ultra-high voltage cable discharge audio detection device includes: Power supply terminal (1); Test transformer (2), wherein the power supply terminal (1) is connected to the input terminal of the test transformer (2); A simulated main transformer (3) is provided, and a simulated load resistor (4) is configured at the output terminal of the simulated main transformer (3); A protective resistor (5) is provided, one end of which is connected to the first pin of the output terminal of the test transformer (2), and the other end of which is connected to the first pin of the input terminal of the test transformer (2). A first connecting cable (6) is connected at one end to the second pin of the output terminal of the test transformer (2); The second connecting cable (7) has one end connected to the second pin of the input terminal of the test transformer (2). The free ends of the first connecting cable (6) and the second connecting cable (7) are arranged at intervals to form a test space (A) for the cable to be tested to be connected. Multiple audio acquisition devices (8) are arranged around the space to be tested (A); The test transformer (2), the simulated main transformer (3), the simulated load resistor (4), the protection resistor (5), the first connecting cable (6), the second connecting cable (7), and the space to be tested (A) are all located in a preset shielded room (B).

2. The ultra-high voltage cable discharge audio detection device as described in claim 1, characterized in that, The device further includes: A partial discharge tester (9) electrically connected to the first connecting cable (6) is used to control the through voltage of the cable under test.

3. The ultra-high voltage cable discharge audio detection device as described in claim 1, characterized in that, The device further includes: A data acquisition system (10) is connected to each of the audio acquisition devices (8) via signal.

4. The ultra-high voltage cable discharge audio detection device as described in claim 1, characterized in that, The device further includes: The distribution cabinet (11) is electrically connected to the power supply terminal (1) and the test transformer (2).

5. The ultra-high voltage cable discharge audio detection device as described in claim 1, characterized in that: The number of audio acquisition devices (8) is 4, and they are evenly distributed around the periphery of the space to be tested (A).

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