Intelligent high-voltage integrated device, high-voltage state monitoring system and rail vehicle

Abstract

The embodiment of the application provides a kind of intelligent high-voltage integrated device, high-voltage state monitoring system and railway vehicle, intelligent high-voltage integrated device includes box, the box is divided into high-voltage area and low-voltage area by partition, vacuum circuit breaker, grounding switch, first voltage transformer, second voltage transformer, cable terminal, arrester and disconnecting switch are provided in the high-voltage area, the low-voltage part of vacuum circuit breaker and the low-voltage part of disconnecting switch are provided in the low-voltage area;The application can check the vacuum degree of vacuum package of vacuum circuit breaker and quickly determine the working state of two voltage transformers by comparing the measurement values of first voltage transformer and second voltage transformer, improve the reliability of the device, avoid to reduce EMU high-voltage system failure.

Description

Technical Field

[0001] This application relates to the field of rail vehicles, specifically to an intelligent high-voltage integrated device, a high-voltage condition monitoring system, and a rail vehicle. Background Technology

[0002] High-voltage systems in high-speed trains typically integrate voltage transformers, vacuum circuit breakers and grounding switches, cable terminals, surge arresters, and disconnectors into a single enclosed space. This reduces the impact of the external environment on the insulation performance of high-voltage components and improves the stability of the high-voltage system to some extent. However, because the space inside the enclosure is relatively enclosed, air cannot be effectively replaced. When the overvoltage generated by the phase break exceeds the corona initiation condition, the air insulation decreases, leading to flashover inside the high-voltage enclosure. At the same time, the harmonic voltage can also cause the surge arresters and voltage transformers to overheat and explode, causing secondary damage to the high-voltage components inside the enclosure. Furthermore, the environment inside the enclosure cannot be viewed, and the fault status cannot be identified. Summary of the Invention

[0003] To address one of the aforementioned technical deficiencies, this application provides an intelligent high-voltage integrated device, system, and vehicle capable of checking the vacuum level of a vacuum circuit breaker vacuum pack.

[0004] According to a first aspect of the embodiments of this application, an intelligent high-voltage integrated device is provided, including a housing, which is divided into a high-voltage zone and a low-voltage zone by a partition. The high-voltage zone is provided with a vacuum circuit breaker, a grounding switch, a first voltage transformer, a second voltage transformer, a cable terminal, a surge arrester, and a disconnecting switch. The low-voltage zone is provided with the low-voltage portion of the vacuum circuit breaker and the low-voltage portion of the disconnecting switch. The stationary end of the vacuum circuit breaker is used to connect to a pantograph via the cable terminal. The connection between the vacuum circuit breaker and the pantograph is connected to the first voltage transformer and the grounding switch, respectively. The moving end of the vacuum circuit breaker is connected to the disconnecting switch, and the connection between the vacuum circuit breaker and the disconnecting switch is connected to the second voltage transformer and the surge arrester, respectively.

[0005] Preferably, a primary energy release protection device is provided on the outside of the enclosure, and the bottom of the surge arrester is connected to the primary energy release protection device through a flange.

[0006] Preferably, a secondary energy release protection device is provided on the outside of the housing, and the primary energy release protection device is connected to the secondary energy release protection device through a pressure relief valve.

[0007] Preferably, a camera, a stepper motor, and a charging device are provided in the low-voltage area, and the camera is electrically connected to the stepper motor and the charging device respectively.

[0008] Preferably, a high-voltage presence / absence determination relay is provided in the high-voltage zone to determine whether the high-voltage zone is in a high-voltage environment, and the high-voltage environment determination result in the high-voltage zone is output to an external monitoring system.

[0009] Preferably, a Bluetooth transmission device is provided in the low-pressure area, and the camera communicates with an external control device through the Bluetooth transmission device.

[0010] Preferably, a storage device is provided in the low-voltage area, and the storage device is electrically connected to the camera.

[0011] Preferably, a supplementary light is provided in the low-pressure area, and the supplementary light is communicatively connected to the external control device via the Bluetooth transmission device and is configured correspondingly to the camera.

[0012] Preferably, the cable terminal includes a main circuit cable terminal, a traction unit cable terminal, and an adjacent traction cable terminal. The vacuum circuit breaker is connected to the pantograph through the main circuit cable terminal. The moving end of the vacuum circuit breaker is connected to the traction unit through the traction unit cable terminal. The disconnecting switch is connected to the adjacent traction cable terminal.

[0013] Preferably, the low-voltage sections of the first voltage transformer and the second voltage transformer are located in the low-voltage zone.

[0014] Preferably, the low-voltage section of the vacuum circuit breaker and the low-voltage section of the disconnecting switch are respectively located on both sides of the high-voltage zone.

[0015] According to a second aspect of the embodiments of this application, a high-voltage status monitoring system is provided for a rail vehicle, including the intelligent high-voltage integrated device as described above. The system includes: a signal receiving unit for receiving voltage signals collected by a first voltage transformer and a second voltage transformer and sending them to an A / D conversion unit; an A / D conversion unit for receiving the collected voltage signals, converting the voltage signals into digital signals, and sending them to the central processing unit of the rail vehicle; the central processing unit for determining the operating status of the intelligent high-voltage integrated device based on the digital signals and generating control commands accordingly; and a signal output unit for receiving the control commands from the central processing unit and outputting control commands to the components to be controlled.

[0016] According to a third aspect of the embodiments of this application, a rail vehicle is provided, including the intelligent high-voltage integrated device as described in the first aspect.

[0017] The intelligent high-voltage integrated device, system, and vehicle provided in this application include a housing, which is divided into a high-voltage zone and a low-voltage zone by a partition. The high-voltage zone contains a vacuum circuit breaker, a grounding switch, a first voltage transformer, a second voltage transformer, a cable terminal, a surge arrester, and a disconnecting switch. The low-voltage zone contains the low-voltage portion of the vacuum circuit breaker and the low-voltage portion of the disconnecting switch. This application can check the vacuum level of the vacuum package of the vacuum circuit breaker and quickly determine the operating status of the two voltage transformers by comparing the measured values ​​of the first and second voltage transformers. When the vacuum circuit breaker is open, the vacuum level of the vacuum package can be determined by the difference between the two voltage transformers. The low-voltage zone of the disconnecting switch and the vacuum circuit breaker is designed separately and isolated from the high-voltage zone, improving the electromagnetic compatibility of the control circuit, enhancing the maintenance convenience of the low-voltage zone control circuit, improving the reliability of the device, and avoiding and reducing the risk of high-voltage system failures in the high-speed train. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of an intelligent high-voltage integrated box provided in an embodiment of this application;

[0020] Figure 2 This application provides a schematic diagram of the structure of an intelligent high-voltage integrated system.

[0021] Figure 3 A schematic diagram illustrating the connection of the intelligent high-voltage integrated device provided in this application embodiment in a main rail vehicle line;

[0022] In the diagram: 1 is the high-voltage zone, 11 is the vacuum circuit breaker, 12 is the grounding switch, 13 is the first voltage transformer, 14 is the second voltage transformer, 15 is the surge arrester, 16 is the disconnecting switch, 17 is the main circuit cable terminal, 18 is the cable terminal of this traction unit, 19 is the adjacent traction cable terminal, 2 is the low-voltage zone, 101 is the signal receiving unit, 102 is the A / D conversion unit, and 103 is the signal output unit. Detailed Implementation

[0023] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0024] In the process of developing this application, the inventors discovered that when the vehicle is running, the vacuum level of the main circuit breaker vacuum pack decreases, which leads to a decline in insulation performance that cannot be monitored. When the vacuum level of the vacuum pack drops to a certain value, it will cause the fault to be unable to be cut off, resulting in the fault impact being further amplified.

[0025] To address the aforementioned problems, this application provides an intelligent high-voltage integrated device, such as... Figure 1 As shown, the enclosure includes a housing, which is divided into a high-voltage zone 1 and a low-voltage zone 2 by a partition. The high-voltage zone 1 contains a vacuum circuit breaker 11, a grounding switch 12, a first voltage transformer 13, a second voltage transformer 14, a cable terminal, a surge arrester 15, and a disconnecting switch 16. The low-voltage zone 2 contains the low-voltage portion of the vacuum circuit breaker 11, the low-voltage portion of the disconnecting switch 16, and the low-voltage portions of the first voltage transformer 13 and the second voltage transformer 14. There are at least two low-voltage zones 2. The low-voltage sections of the vacuum circuit breaker 11 and the disconnector 16 are respectively located on both sides of the high-voltage zone 1. The stationary end of the vacuum circuit breaker 11 is used to connect to the pantograph via a cable terminal. The connection between the vacuum circuit breaker 11 and the pantograph is connected to the first voltage transformer 13 and the grounding switch 12, respectively. The moving end of the vacuum circuit breaker 11 is connected to the disconnector 16. The connection between the vacuum circuit breaker 11 and the disconnector 16 is connected to the second voltage transformer 14 and the surge arrester 15, respectively.

[0026] This device is an undercarriage installation type. The first voltage transformer 13 and the second voltage transformer 14 are respectively installed at the input and output terminals of the vacuum circuit breaker 11. By comparing the measured values ​​of the first voltage transformer 13 and the second voltage transformer 14, the vacuum level of the vacuum chamber of the vacuum circuit breaker can be checked and the working status of the two voltage transformers can be quickly determined. When the vacuum circuit breaker is open, the vacuum level of the vacuum chamber can be determined by the difference between the two voltage transformers. The low-voltage area of ​​the disconnecting switch and the vacuum circuit breaker is designed separately and isolated from the high-voltage area to improve the electromagnetic compatibility of the control circuit, improve the maintenance convenience of the low-voltage area control circuit, improve the reliability of the device, and avoid and reduce the failure of the high-voltage system of the EMU.

[0027] Furthermore, a primary energy release protection device 3 and a secondary energy release protection device 4 are provided on the outside of the enclosure. The bottom of the surge arrester 15 is connected to the primary energy release protection device 3 via a flange. The primary energy release protection device 3 can be a closed enclosure located at the bottom of the surge arrester 15, and the primary energy release protection device 3 is connected to the secondary energy release protection device via a pressure relief valve. The secondary energy release protection device 4 includes an expansion airbag, and the secondary energy release protection device 4 is normally in a compressed state. In this embodiment, by selecting a surge arrester that changes from side energy release to flange bottom release, and designing a primary energy release protection device 3 on the outside of the mounting enclosure, this device can withstand energy storage of a relatively small energy level. When the internal pressure exceeds the set value of the pressure relief valve, the vent valve opens, and the secondary energy release protection device 4 is quickly activated to reduce the pressure rise caused by the rapid rise in energy, thereby protecting the primary energy release protection device 3. In this embodiment, the primary energy release protection device 3 and the secondary energy protection device 4 are set at the bottom of the surge arrester 15. That is, a closed space is designed at the rear end of the surge arrester as a release space to prevent zinc oxide vapor from being released into the high-pressure area and affecting other components in the high-pressure area. By setting up a dedicated surge arrester release space, the impact of surge arrester thermal release on other components is eliminated, solving the current situation of needing to disassemble and inspect. This can effectively avoid common faults in the vehicle's high-voltage system, provide early warning, and improve the stability of vehicle operation and the convenience of maintenance.

[0028] The low-voltage area is equipped with a camera, a stepper motor, and a charging device. The camera is electrically connected to both the stepper motor and the charging device. The camera assembly is located inside the enclosure, relatively far away (more than 310mm) from high-voltage sections such as vacuum circuit breakers, in a safe location. The camera is designed to monitor the status of vacuum circuit breakers and disconnect switches.

[0029] A high-voltage presence / absence determination relay is installed in the high-voltage area to determine whether the area is in a high-voltage environment.

[0030] A Bluetooth transmission device is installed in the low-voltage area. The camera communicates with external control equipment (such as a handheld terminal, control center, etc.) through the Bluetooth transmission device. The external control equipment is carried by the maintenance personnel.

[0031] A storage device is installed in the low-voltage area, and the storage device is electrically connected to the camera; the storage device is used by maintenance personnel to manually store the camera's data information when a fault occurs in the high-voltage area.

[0032] A supplementary light is installed in the low-voltage area, positioned above the camera. This supplementary light communicates with the external control device via Bluetooth and is positioned corresponding to the camera to illuminate components such as circuit breakers and disconnect switches, facilitating camera imaging of these components. Preferably, the supplementary light is linked to the camera, meaning it moves with the camera to provide illumination for imaging at any time.

[0033] Specifically, when maintenance is required in the high-voltage area, the presence or absence of a high-voltage determinant relay determines whether the area is in a high-voltage environment. When the area is in a high-voltage environment, the camera does not operate. When the area is in a non-high-voltage environment, the handheld terminal issues a maintenance command, activating the supplementary light and waking up the camera. The handheld terminal selects the maintenance mode. In automatic mode, according to the protocol, the camera slides on a specific track driven by a stepper motor to inspect the vacuum circuit breaker 11 and the disconnect switch 16, and sends the fault point to the handheld terminal for manual confirmation. This method, by using the presence or absence of a high-voltage determinant relay, avoids damage to the camera caused by operating in a high-voltage environment in the high-voltage area. In non-automatic mode, maintenance personnel select the components to be inspected, perform an overall inspection, and manually control the camera's field of view. Maintenance video and data analysis can be transmitted to the equipment used by the inspection personnel via Bluetooth or a communication interface. This embodiment solves the problem of needing to disassemble the enclosure for inspection in high-voltage areas by setting up an intelligent inspection camera, realizing remote, visual, and intelligent inspection and patrol.

[0034] Furthermore, the cable terminal includes a main circuit cable terminal 17, a traction unit cable terminal 18, and an adjacent traction cable terminal 19. The vacuum circuit breaker 11 is connected to the pantograph through the main circuit cable terminal 17. The moving end of the vacuum circuit breaker 11 is connected to the traction unit through the traction unit cable terminal 18. The disconnecting switch 16 is connected to the adjacent traction cable terminal 19.

[0035] This application provides a high-voltage status monitoring system for rail vehicles, including the intelligent high-voltage integrated device described above, such as... Figure 2 As shown, the system includes:

[0036] Signal receiving unit 101: used to receive the voltage signals collected by the first voltage transformer 13 and the second voltage transformer 14 and send them to the A / D conversion unit;

[0037] A / D conversion unit 102: used to receive the collected voltage signal, convert the voltage signal into a digital signal and send it to the central processing unit of the rail vehicle. The central processing unit determines the working status of the intelligent high-voltage integrated device based on the digital signal and generates control commands accordingly. The control commands include vacuum circuit breaker control commands and pantograph control commands.

[0038] Signal output unit 103: used to receive control commands from the central processing unit and output control commands to the component to be controlled; the component to be controlled may include a vacuum circuit breaker and a pantograph, etc.

[0039] Specifically, based on the characteristics of signal acquisition, the signal receiving unit 101 receives analog voltage signals acquired by the first voltage transformer 13 and the second voltage transformer 14, converts the analog signals into digital signals through the A / D conversion unit 102, processes them, and sends them to the central processing unit of the rail vehicle. The central processing unit determines the operating status of the intelligent high-voltage integrated device based on the digital signals and generates corresponding control commands. The signal output unit 103 receives the control commands from the central processing unit and outputs control commands to the components to be controlled. In this embodiment, the first voltage signal is acquired... The central processing unit of the rail vehicle determines the working status of the intelligent high-voltage integrated device based on the digital signals of the current transformer 13 and the second voltage transformer 14, and generates corresponding control commands to determine whether the vacuum circuit breaker 11 is open and whether the pantograph is lowered, so as to avoid the vacuum failure of the vacuum bag of the vacuum circuit breaker 11 and the expansion of the inter-turn short circuit fault of the first voltage transformer 13 and the second voltage transformer 14. The central processing unit of the rail vehicle prompts the driver to disconnect which traction unit the fault is located in. After disconnecting it, the driver can continue to maintain the operation of the locomotive and rolling stock.

[0040] In this embodiment, the intelligent high-voltage integrated device is installed under the vehicle. For example... Figure 3As shown, cars 03 and 06 are equipped with pantographs, and intelligent high-voltage integrated devices installed in cars 03 and 06 are connected to their pantographs respectively. For ease of explanation, it is assumed that the pantograph of car 03 is raised, while the pantograph of car 06 is not raised; that is, car 03 is the pantograph raising unit side, and car 06 is the non-pantograph raising unit side. The first voltage transformer 13 in the intelligent high-voltage integrated device installed on the pantograph raising unit side of the train is VT1, and the second voltage transformer 14 is VT2. VT1 is located between the vacuum circuit breaker 11 and the pantograph, and VT2 is located after the vacuum circuit breaker 11. Correspondingly, the first voltage transformer 13 in the intelligent high-voltage integrated device installed on the non-pantograph raising unit side is VT3, and the second voltage transformer 14 is VT4. VT3 is located between the vacuum circuit breaker 11 and the pantograph, and VT4 is located after the vacuum circuit breaker 11. Furthermore, the second voltage transformers of each vehicle are connected by a common busbar and are at the same potential; that is, VT2 of vehicle 03 and VT4 of vehicle 06 are connected by a common busbar, and the two voltage transformers are at the same potential. In this embodiment, the vacuum level of the vacuum circuit breaker can be determined by the following method.

[0041] The method for monitoring the vacuum level of the vacuum circuit breaker on the pantograph unit side (corresponding to car 03) is as follows: when the pantograph of car 03 is raised, the vacuum circuit breaker is not closed, and the voltage transformer VT2 on the back side of the vacuum circuit breaker is greater than the threshold (e.g., 2.5kV), it indicates that the vacuum level of the vacuum circuit breaker on the pantograph unit side has failed. At this time, closing the vacuum circuit breaker should be prohibited, the pantograph should be lowered and locked, the disconnect switch should be opened, and the other pantograph (i.e., the pantograph of car 06) should be raised and operated at reduced power. The vacuum level monitoring of the vacuum circuit breaker on the non-pantograph unit side (corresponding to car 06) indicates that the vacuum level of the vacuum circuit breaker on the non-pantograph unit side has failed. If the pantograph on the pantograph unit side (i.e., car 03) is raised, the vacuum circuit breaker is closed, and the voltage transformer VT3 on the non-pantograph unit side is greater than the threshold (e.g., 2.5kV), it indicates that the vacuum level of the vacuum circuit breaker on the non-raised end of the pantograph has failed. It also indicates that the vacuum level of the vacuum circuit breaker on the non-raised end of the pantograph has failed. It is forbidden to close this vacuum circuit breaker in the future. The prompt is to disconnect the working end vacuum circuit breaker, open the isolating switch, and close the working end vacuum circuit breaker again to reduce the power operation.

[0042] The 2.5kV threshold given in this embodiment is merely exemplary and can be selected according to actual circumstances and needs. Furthermore, the threshold in different expressions can be different.

[0043] Furthermore, when the pantograph of vehicle 03, which is the pantograph raising unit, is raised, the vacuum circuit breaker is closed, and VT1-VT2 > threshold (e.g., 2.5kV) and VT1-VT4 > threshold (e.g., 2.5kV), it indicates a fault in VT1 on the pantograph raising unit side. At this time, the central control unit will automatically disconnect the vacuum circuit breaker and lower the pantograph. The central control unit will prompt the user to manually raise the pantograph of another unit and close the main circuit breaker for full-power operation. The same applies to other voltage transformers.

[0044] Furthermore, since VT2 and VT4 are at the same potential, they can be combined into a single VT2 voltage transformer, reducing the number of voltage transformers. After a short circuit fault between the vacuum circuit breaker vacuum package and the voltage transformer turns, assessing the voltage between VT1 and VT2 can also help determine the fault. However, after the fault mitigation measures are implemented and the disconnecting switch is opened, the other half of the high-voltage system cannot perform intelligent detection. This is because VT2 and VT4 are not combined, and a second voltage transformer is not installed on the downstream side of the vacuum circuit breaker on each intelligent high-voltage integrated device. Therefore, it is impossible to use the second voltage transformer to monitor and determine the vacuum level of the vacuum package on the lifting unit side of the vacuum circuit breaker. In other words, combined with... Figure 3 As shown, if VT2 and VT4 are combined, it is impossible to use VT4 to monitor and determine whether the vacuum pack of the vacuum circuit breaker on the 03 car side of the pantograph unit has failed.

[0045] A rail vehicle includes the intelligent high-voltage integrated device as described above, which is installed in multiple carriages of the vehicle and mounted under the vehicle. Alternatively, the rail vehicle includes the high-voltage status monitoring system described in the above embodiments, with the central processing unit of the rail vehicle connected to the A / D conversion unit and signal output unit of the high-voltage status monitoring system.

[0046] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship 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.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0050] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An intelligent high-voltage integrated device, comprising a housing, characterized in that, The enclosure is divided into a high-voltage zone and a low-voltage zone by a partition. The high-voltage zone is equipped with a vacuum circuit breaker, a grounding switch, a first voltage transformer, a second voltage transformer, a cable terminal, a surge arrester, and a disconnecting switch. The low-voltage zone is equipped with the low-voltage section of the vacuum circuit breaker and the low-voltage section of the disconnecting switch. The stationary end of the vacuum circuit breaker is used to connect to the pantograph via a cable terminal. The connection between the vacuum circuit breaker and the pantograph is connected to the first voltage transformer and the grounding switch, respectively. The moving end of the vacuum circuit breaker is connected to the disconnecting switch. The connection between the vacuum circuit breaker and the disconnecting switch is connected to the second voltage transformer and the surge arrester, respectively. With this configuration, when the vacuum circuit breaker is open, the vacuum level of the vacuum pack can be determined by the difference between the two voltage transformers. A primary energy release protection device is installed on the outside of the enclosure, and the bottom of the surge arrester is connected to the primary energy release protection device through a flange; a secondary energy release protection device is installed on the outside of the enclosure, and the primary energy release protection device is connected to the secondary energy release protection device through a pressure relief valve.

2. The intelligent high-voltage integrated device according to claim 1, characterized in that, The low-voltage area is equipped with a camera, a stepper motor, and a charging device. The camera is electrically connected to the stepper motor and the charging device, respectively.

3. The intelligent high-voltage integrated device according to claim 2, characterized in that, The high-voltage zone is equipped with a high-voltage presence / absence determination relay for determining whether the high-voltage zone is in a high-voltage environment, and for outputting the high-voltage environment determination result to an external monitoring system.

4. The intelligent high-voltage integrated device according to claim 2, characterized in that, A Bluetooth transmission device is installed in the low-pressure area, and the camera communicates with external control equipment through the Bluetooth transmission device.

5. The intelligent high-voltage integrated device according to claim 2, characterized in that, A storage device is installed in the low-voltage area, and the storage device is electrically connected to the camera.

6. The intelligent high-voltage integrated device according to claim 4, characterized in that, A supplementary light is installed in the low-pressure area. The supplementary light is connected to the external control device via the Bluetooth transmission device and is configured to correspond to the camera.

7. The intelligent high-voltage integrated device according to claim 1, characterized in that, The cable terminal includes a main circuit cable terminal, a traction unit cable terminal, and an adjacent traction cable terminal. The vacuum circuit breaker is connected to the pantograph through the main circuit cable terminal. The moving end of the vacuum circuit breaker is connected to the traction unit through the traction unit cable terminal. The disconnecting switch is connected to the adjacent traction cable terminal.

8. The intelligent high-voltage integrated device according to claim 1, characterized in that, The low-voltage sections of the first and second voltage transformers are located in the low-voltage zone.

9. The intelligent high-voltage integrated device according to claim 1, characterized in that, The low-voltage section of the vacuum circuit breaker and the low-voltage section of the disconnecting switch are respectively located on both sides of the high-voltage zone.

10. A high-voltage condition monitoring system for rail vehicles, characterized in that, The system includes the intelligent high-voltage integrated device as described in any one of claims 1 to 9, wherein the system comprises: Signal receiving unit: used to receive the voltage signals collected by the first voltage transformer and the second voltage transformer and send them to the A / D conversion unit; A / D conversion unit: used to receive the collected voltage signal, convert the voltage signal into a digital signal and send it to the central processing unit of the rail vehicle. The central processing unit determines the working status of the intelligent high-voltage integrated device based on the digital signal and generates control commands accordingly. Signal output unit: used to receive control commands from the central processing unit and output control commands to the component to be controlled.

11. A rail vehicle, characterized in that, It includes the intelligent high-voltage integrated device as described in any one of claims 1 to 9; or, it includes the high-voltage status monitoring system as described in claim 10.

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