Switch cabinet partial discharge monitoring device based on acoustic-electric combination

Abstract

The invention relates to the field of switch cabinet monitoring, in particular to a switch cabinet partial discharge monitoring device based on acoustic-electric combination, which comprises a switch cabinet main body, an installation space for installing electrical components is arranged in the switch cabinet main body, and a monitoring space covering the outer side of the installation space is arranged in the switch cabinet main body. A monitoring device used for monitoring partial discharge of the switch cabinet is arranged in the monitoring space, the size of the monitoring space is matched with the length of the monitoring device, and the monitoring device moves on the outer side of the installation space through the monitoring space. Corners of the inner wall of the switch cabinet body can be ignored, the side faces and the top of the inner wall of the switch cabinet body can move freely, and monitoring of the partial discharge state in the switch cabinet body can be completed from multiple points.

Description

Technical Field

[0001] This invention relates to the field of switchgear monitoring, specifically to a switchgear partial discharge monitoring device based on acoustic-electric combination. Background Technology

[0002] In operating electrical equipment, under the influence of an electric field, only some areas discharge without penetrating the conductors to which voltage is applied, i.e., they have not yet broken down. This phenomenon is called partial discharge. In switchgear, there are mainly connection points such as busbars and incoming / outgoing lines, trolley contacts, CT connectors, and cable connectors. These connection points have varying degrees of contact resistance due to various reasons, causing the contact point temperature to rise. During operation, these connection points further increase their contact resistance due to mechanical vibration, overheating oxidation, expansion and relaxation, surface corrosion, etc., leading to local heating or even combustion and arc discharge at the connection points. Ultimately, this can lead to accidents such as damage to electrical equipment, power outages, fires, or explosions, seriously threatening the economic and safe operation of the power grid.

[0003] For switchgear, partial discharge detection methods include ground wave detection, ultrasonic detection, and ultra-high frequency detection. However, each method has certain limitations and cannot objectively, comprehensively, and truthfully reflect the operating status of the switchgear. There is also the possibility of misjudgment. In order to monitor partial discharge in switchgear from more perspectives, we propose a switchgear partial discharge monitoring device based on acoustic-electric combination. Summary of the Invention

[0004] The purpose of this invention is to provide a partial discharge monitoring device for switchgear based on acoustic-electric combination, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, a partial discharge monitoring device for switchgear based on acoustic-electric combination is provided, comprising a switchgear body, an installation space for installing electrical components inside the switchgear body, a monitoring space covering the outside of the installation space inside the switchgear body, a monitoring device for monitoring partial discharge of the switchgear inside the monitoring space, the size of the monitoring space being adapted to the length of the monitoring device, and the monitoring device moving outside the installation space through the monitoring space.

[0006] Furthermore, the monitoring device includes a traveling mechanism and a monitoring mechanism. Two sets of traveling mechanisms are fixedly installed at both ends of the monitoring mechanism. Each traveling mechanism includes a connecting frame. One end of the connecting frame is fixedly installed at one end of the traveling mechanism. A motor A is fixedly installed at one end of the connecting frame. A traveling wheel is fixedly connected to the output end of the motor A. The traveling wheel is rotatably connected to the inner side of the connecting frame through the motor A.

[0007] Furthermore, the cross-sectional shape of the traveling wheel is a regular polygon, and an electromagnet A and a distance sensor are fixedly installed on each side of the outer wall of the traveling wheel.

[0008] Furthermore, the monitoring mechanism includes a fixed platform, a motor B is fixedly installed inside the fixed platform, an installation platform is fixedly connected to the output end of the motor B, an acoustic and optical sensor is provided on the outer wall of the installation platform, and a movable platform is rotatably connected to the other end of the installation platform.

[0009] Furthermore, an electric telescopic rod is fixedly installed inside the mounting platform, a steering motor is fixedly installed at the movable end of the electric telescopic rod, and an electromagnet B is fixedly connected to the output end of the steering motor.

[0010] Furthermore, the acoustic-optical sensor includes an acoustic sensor for acquiring sound data of the main body of the switch cabinet and an infrared light sensor for acquiring infrared light data of the main body of the switch cabinet.

[0011] Furthermore, the mounting platform is equipped with a rechargeable battery and a control chip.

[0012] Furthermore, several image recognition cameras are fixedly installed on the outer wall of the mounting platform.

[0013] Furthermore, the outer wall of the traveling wheel is provided with a rubber layer.

[0014] Furthermore, the two sets of traveling mechanisms are symmetrically arranged on both sides of the monitoring mechanism.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In this solution, by setting up a monitoring space and coordinating the movement of the monitoring device, which moves by flipping, the monitoring device can move freely on the sides and top of the switchgear body, regardless of the corners of the inner wall, provided there is sufficient space. This allows for monitoring of partial discharge status inside the switchgear body from multiple points. During the automatic flipping process, the monitoring device can pause even when fixed at a single point, causing one end to tilt up and further changing the orientation between the acoustic and optical sensors and the installation space. This makes the monitoring more flexible and allows the monitoring device with monitoring instruments to be moved to various locations on the inner wall of the switchgear body for multi-point monitoring outside the installation space. This makes the monitoring of abnormal partial discharge more complete and less prone to obstruction. Attached Figure Description

[0016] Figure 1 This is a schematic elevation view of the main body of the switch cabinet in this invention; Figure 2 This is a schematic diagram of the internal layout of the switch cabinet body in this invention; Figure 3This is a schematic diagram of the monitoring device in this invention; Figure 4 This is a schematic diagram of one side of the connecting frame in this invention; Figure 5 This is a schematic diagram of one side of the mounting platform in this invention.

[0017] In the picture: 1. Switchgear body; 2. Installation space; 3. Monitoring space; 4. Monitoring device; 5. Traveling mechanism; 6. Monitoring mechanism; 7. Connecting frame; 8. Motor A; 9. Traveling wheel; 10. Electromagnet A; 11. Distance sensor; 12. Fixed platform; 13. Motor B; 14. Mounting platform; 15. Acoustic and optical sensor; 16. Movable platform; 17. Steering motor; 18. Electromagnet B; 19. Image recognition camera. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] A partial discharge monitoring device for switchgear based on acoustic-electric combination, such as Figure 1-5 As shown, a partial discharge monitoring device for switchgear based on acoustic-electric combination includes a switchgear body 1. The switchgear body 1 has an installation space 2 for installing electrical components inside. The switchgear body 1 also has a monitoring space 3 covering the outside of the installation space 2 inside. The monitoring space 3 has a monitoring device 4 for monitoring partial discharge of the switchgear inside. The size of the monitoring space 3 is adapted to the length of the monitoring device 4. The monitoring device 4 moves outside the installation space 2 through the monitoring space 3.

[0020] Specifically, the monitoring device 4 includes a traveling mechanism 5 and a monitoring mechanism 6. Two sets of traveling mechanisms 5 are fixedly installed at both ends of the monitoring mechanism 6. The traveling mechanism 5 includes a connecting frame 7. One end of the connecting frame 7 is fixedly installed at one end of the traveling mechanism 5. A motor A8 is fixedly installed at one end of the connecting frame 7. The output end of the motor A8 is fixedly connected to a traveling wheel 9. The traveling wheel 9 is rotatably connected to the inside of the connecting frame 7 through the motor A8. After the motor A8 is started, the motor A8 controls the traveling wheel 9 to rotate inside the connecting frame 7.

[0021] The traveling wheel 9 has a regular polygonal cross-section. Each side of the outer wall of the traveling wheel 9 is fixedly equipped with an electromagnet A10 and a distance sensor 11. After the motor A8 starts, the traveling wheel 9 rotates, which enables one side of the traveling wheel 9 to fit against the inner wall of the switch cabinet body 1. The distance sensor 11 senses the distance between this side and the inner wall of the switch cabinet body 1. After the fit is achieved, the electromagnet A10 corresponding to this side is activated, thereby attracting the corresponding traveling mechanism 5 to the inner wall of the switch cabinet body 1. It is understandable that when both sets of traveling mechanisms 5 are fixed, the position of the monitoring mechanism 6 can be fixed, thereby monitoring the partial discharge state inside the switch cabinet body 1 at that location. When only one set of traveling mechanisms 5 is fixed, the motor A8 at one end of the fixed traveling mechanism 5 is started, which can control the monitoring mechanism 6 and the other end of the traveling mechanism 5 to rotate. During the rotation process, the other end of the traveling mechanism 5 senses the distance between itself and the inner wall of the switch cabinet body 1 through the distance sensor 11, and completes the rotation of the traveling wheel 9 after the motor A8 is started. When one side of the traveling wheel 9 is in contact with the inner wall of the switch cabinet body 1, the electromagnet A10 on the corresponding side is started. At this time, the movement process of the monitoring device 4 ends. It should be added that, since the monitoring device 4 moves by flipping, it can ignore the corners of the inner wall of the switch cabinet body 1 when there is enough space, and can move freely on the sides and top of the inner wall of the switch cabinet body 1, and can monitor the partial discharge state inside the switch cabinet body 1 from multiple points.

[0022] The monitoring mechanism 6 includes a fixed platform 12, with a motor B13 fixedly installed inside the fixed platform 12. The output end of the motor B13 is fixedly connected to a mounting platform 14. An acoustic and optical sensor 15 is installed on the outer wall of the mounting platform 14. A movable platform 16 is rotatably connected to the other end of the mounting platform 14. The fixed platform 12 can control the mounting platform 14 to rotate to one side through the motor B13. The movable platform 16 on one side of the mounting platform 14 can be fixed by the traveling mechanism 5. That is, the mounting platform 14 can rotate inside the fixed platform 12 and the movable platform 16, changing the orientation of the surface acoustic and optical sensor 15, making the monitoring of the inside of the switch cabinet body 1 more flexible.

[0023] Specifically, an electric telescopic rod is fixedly installed inside the mounting platform 14. A steering motor 17 is fixedly installed at the movable end of the electric telescopic rod, and an electromagnet B18 is fixedly connected to the output end of the steering motor 17. When the monitoring device 4 needs to change its direction of movement, the motor B13 controls the mounting platform 14 to rotate. In conjunction with the distance sensor 11 set on the outside of the mounting platform 14, the electromagnet B18 is positioned directly opposite the inner wall of the switch cabinet body 1. The electric telescopic rod pushes the steering motor 17 and the electromagnet B18 until the electromagnet B18 is in contact with the inner wall of the switch cabinet body 1. Then, the electromagnet B18 starts to fix the mounting platform 14 to the inner wall of the switch cabinet body 1. The electric telescopic rod moves again, causing the traveling mechanism 5 to detach from the inner wall of the switch cabinet body 1. During this process, the electromagnet A10 on the traveling mechanism 5 is in the closed state. At this time, after the steering motor 17 starts, due to the attraction between the electromagnet B18 and the inside of the switch cabinet body 1, the traveling mechanism 5 can rotate with the electromagnet B18 as the fulcrum. For example, rotating 90 degrees can change the direction of movement of the monitoring device 4, switching between horizontal and vertical movement.

[0024] Specifically, the sound and light sensor 15 includes a sound sensor for acquiring sound data of the switch cabinet body 1 and an infrared light sensor for acquiring infrared light data of the switch cabinet body 1. The sound data acquired by the sound sensor is compared with the preset value of the sound data, and the infrared light data acquired by the infrared light sensor is compared with the preset value of the infrared light data. The reference value of each data is the value recorded by the monitoring device 4 at the current position of the switch cabinet body 1 under normal operating conditions. During long-term monitoring, if abnormal data is found when moving to the current position, an alarm can be triggered. The alarm method includes sound and light alarm or wireless communication alarm.

[0025] Specifically, the mounting platform 14 is equipped with a rechargeable battery and a control chip. The charging method is not limited to wireless charging or wired charging, which facilitates the long-term operation of the monitoring device 4.

[0026] Several image recognition cameras 19 are fixedly installed on the outer wall of the mounting platform 14. During the movement of the monitoring device 4, the cameras also take pictures of various parts inside the switch cabinet body 1 and transmit the data to the cloud. When an abnormality is detected by the data recorded in the cloud during the shooting process, an alarm is issued.

[0027] The outer wall of the traveling wheel 9 is provided with a rubber layer to reduce the noise generated when the traveling mechanism 5 contacts the inner wall of the switch cabinet body 1 and to make the contact smoother.

[0028] Specifically, to maintain the balance of the device, the two sets of traveling mechanisms 5 are symmetrically arranged on both sides of the monitoring mechanism 6.

[0029] It should be added that ground wave detection, ultrasonic detection and ultra-high frequency monitoring instruments can also be installed on the outside of monitoring agency 6. The monitoring methods of monitoring agency 6 include, but are not limited to, acoustic and light monitoring.

[0030] It is understandable that after the motor A8 starts, the rotation of the traveling wheel 9 enables one side of the traveling wheel 9 to fit against the inner wall of the switch cabinet body 1. The distance sensor 11 senses the distance between this side and the inner wall of the switch cabinet body 1. After the fit is achieved, the corresponding electromagnet A10 is activated, thereby attracting the corresponding traveling mechanism 5 to the inner wall of the switch cabinet body 1. It is understandable that when both sets of traveling mechanisms 5 are fixed, the position of the monitoring mechanism 6 can be fixed, thereby monitoring the partial discharge state inside the switch cabinet body 1 at that location. When only one set of traveling mechanisms 5 is fixed, the motor A8 at one end of the fixed traveling mechanism 5 is started, which can control the monitoring mechanism 6 and the other end of the traveling mechanism 5 to rotate. During the rotation process, the other end of the traveling mechanism 5 senses the distance between itself and the inner wall of the switch cabinet body 1 through the distance sensor 11, and completes the rotation of the traveling wheel 9 after the motor A8 is started. When one side of the traveling wheel 9 is in contact with the inner wall of the switch cabinet body 1, the electromagnet A10 on the corresponding side is started, and the movement process of the detection device 4 ends. When the monitoring device 4 needs to change its direction of movement, the motor B13 controls the mounting platform 14 to rotate. In conjunction with the distance sensor 11 set on the outside of the mounting platform 14, the electromagnet B18 is positioned directly against the inner wall of the switch cabinet body 1. The electric telescopic rod pushes the steering motor 17 and the electromagnet B18 until the electromagnet B18 is in contact with the inner wall of the switch cabinet body 1. Then, the electromagnet B18 starts to fix the mounting platform 14 to the inner wall of the switch cabinet body 1. The electric telescopic rod moves again to disengage the traveling mechanism 5 from the inner wall of the switch cabinet body 1. During this process, the electromagnet A10 on the traveling mechanism 5 is in the closed state. At this time, after the steering motor 17 starts, due to the attraction between the electromagnet B18 and the inside of the switch cabinet body 1, the traveling mechanism 5 can rotate with the electromagnet B18 as the fulcrum. For example, rotating 90 degrees can change the direction of movement of the monitoring device 4, switching between horizontal and vertical movement states. During the long-term movement of the monitoring device 4 within the monitoring space 3, the data recorded at a fixed position will be used as the reference value of the data collected by each sensor when the device moves to the same location. This reference value will be set as the value recorded by the monitoring device 4 at the current location of the switch cabinet body 1 under normal operating conditions. During the long-term monitoring process, if abnormal data is found when the device moves to the current location, an alarm will be triggered. The alarm methods include audible and visual alarms or wireless communication alarms. It should be added that, since the monitoring device 4 moves by flipping, it can move freely on the sides and top of the inner wall of the switch cabinet body 1, regardless of the corners of the inner wall of the switch cabinet body 1, provided there is enough space. It can monitor the partial discharge state inside the switch cabinet body 1 from multiple points. During the automatic flipping process, the monitoring device 4 can also pause when a single point is fixed, causing one end to tilt up, further changing the orientation between the acoustic and optical sensor 15 and the installation space 2, making the monitoring more flexible.

[0031] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted herein.

Claims

1. A combined acoustic and electric based switchgear partial discharge monitoring device, comprising a switchgear main body (1), an installation space (2) for installing electrical components is arranged inside the switchgear main body (1), characterized in that, The inside of the switch cabinet body (1) is provided with a monitoring space (3) covering the outside of the installation space (2), the inside of the monitoring space (3) is provided with a monitoring device (4) for monitoring the partial discharge of the switch cabinet, the size of the monitoring space (3) is matched with the length of the monitoring device (4), and the monitoring device (4) is movable outside the installation space (2) through the monitoring space (3).

2. The switch cabinet partial discharge monitoring device based on the combination of sound and electricity according to claim 1, characterized in that: The monitoring device (4) comprises a traveling mechanism (5) and a monitoring mechanism (6), two groups of traveling mechanisms (5) are fixedly installed at both ends of the monitoring mechanism (6), the traveling mechanism (5) comprises a connecting frame (7), one end of the connecting frame (7) is fixedly installed at one end of the traveling mechanism (5), one end of the connecting frame (7) is fixedly installed with a motor A (8), the output end of the motor A (8) is fixedly connected with a traveling wheel (9), and the traveling wheel (9) is rotatably connected to the inner side of the connecting frame (7) through the motor A (8). 3.The acoustic-electric combined based switch cabinet partial discharge monitoring device according to claim 2, characterized in that: The cross section of the traveling wheel (9) is a regular polygon, and an electromagnet A (10) and a distance sensor (11) are fixedly installed on each side of the outer wall of the traveling wheel (9).

4. The switch cabinet partial discharge monitoring device based on the combination of sound and electricity according to claim 2, characterized in that: The monitoring mechanism (6) comprises a fixed table (12), the inside of the fixed table (12) is fixedly installed with a motor B (13), the output end of the motor B (13) is fixedly connected with a mounting table (14), the outer wall of the mounting table (14) is provided with an audible and light sensor (15), and the other end of the mounting table (14) is rotatably connected with a movable table (16).

5. The apparatus according to claim 2, characterized in that: The inside of the mounting table (14) is fixedly installed with an electric telescopic rod, the movable end of the electric telescopic rod is fixedly installed with a steering motor (17), and the output end of the steering motor (17) is fixedly connected with an electromagnet B (18).

6. The combined acoustic and electric based switchgear partial discharge monitoring device according to claim 4, characterized in that: The audible and light sensor (15) comprises a sound sensor for acquiring sound data of the switch cabinet body (1) and an infrared light sensor for acquiring infrared light data of the switch cabinet body (1).

7. The combined acoustic and electric based switchgear partial discharge monitoring device according to claim 6, characterized in that: The inside of the mounting table (14) is provided with a rechargeable battery and a control chip. 8.The switch cabinet partial discharge monitoring device based on the combination of sound and electricity of claim 6, wherein: The outer wall of the mounting table (14) is fixedly installed with a plurality of image recognition cameras (19).

9. The combined acoustic and electric based switchgear partial discharge monitoring device according to claim 3, characterized in that: The outer wall of the traveling wheel (9) is provided with a rubber layer. 10.The switch cabinet partial discharge monitoring device based on the combination of sound and electricity of claim 2, wherein: The two groups of traveling mechanisms (5) are symmetrically arranged on both sides of the monitoring mechanism (6).

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