Partial discharge monitoring device and system

Abstract

The present invention relates to the field of power equipment detection technology, and discloses a partial discharge monitoring device and system. The device includes a travel assembly, a support and adjustment assembly, a detection assembly, a cleaning assembly, and a guide probe assembly. The travel assembly is disposed below the support and adjustment assembly, the detection assembly and the cleaning assembly are both disposed on the support and adjustment assembly, and the guide probe assembly is disposed on the cleaning assembly. The detection assembly includes a detector body disposed above the support and adjustment assembly, and a detection head is disposed at one end of the detector body. By organically combining the travel assembly, the support and adjustment assembly, the detection assembly, the cleaning assembly, and the guide probe assembly, the device can automatically complete the entire process of movement, detection, and cleaning, eliminating the need for manual handheld operation, thereby greatly improving detection efficiency and stability.

Description

Technical Field

[0001] The present invention belongs to the technical field of power equipment detection, and in particular relates to a partial discharge monitoring device and system. Background Art

[0002] Partial discharge (PD) refers to the electrical discharge phenomenon in localized areas of the insulating dielectric of power equipment. In operating power equipment, discharge occurs only in certain areas under the influence of an electric field, without penetrating the voltage-applied conductors, i.e., without breakdown. This phenomenon is called partial discharge. PD is caused by localized electric field distortion and concentrated field strength, which leads to gas discharge or breakdown in a localized area of ​​the insulating dielectric. It typically occurs in the insulating material of high-voltage equipment. Although this discharge has low energy, its long-term presence can cause insulation material aging and performance degradation, ultimately leading to equipment failure and even power outages. Therefore, PD monitoring devices are used to timely monitor and assess PD in power equipment to ensure the safe and stable operation of the power system.

[0003] For example, Chinese patent application number 2022109534460 discloses a switch cabinet partial discharge monitoring device, which includes two traveling mechanisms, a sliding drive mechanism, and a partial discharge detector. A sliding drive mechanism is provided between the two traveling mechanisms. This device can avoid the risk of workers falling and improve detection efficiency. However, the work efficiency of the workers is low.

[0004] For example, Chinese patent application number 2017213199205 discloses a handheld switchgear partial discharge detection device, which includes a housing, a touch screen installed on the front of the housing, and a power board, a core board, an ultrasonic processor, a TEV signal processor, a TEV receiving antenna, and an ultrasonic sensor installed in the inner cavity of the housing. The detection device is easy to carry and can quickly and accurately measure and judge the partial discharge of the switchgear. However, the instability of moving the handheld partial discharge detection device during detection may cause errors in the detection data, affecting the detection results.

[0005] Based on the above scheme, when performing transient ground voltage detection on the switch cabinet, manual detection is required at multiple measurement points. Due to the different heights of the measurement points, manual operation is inconvenient and inefficient when the position is high, and the existing method cannot timely adjust the height of the detection component according to the height of the measurement point. In the process of manually holding the partial discharge monitoring device to perform ultrasonic detection along the gap of the switch cabinet, the manual handheld device cannot be moved stably along the gap of the switch cabinet, and the positioning error of the gap of the switch cabinet observed by the human eye is large, which affects the detection accuracy. During the movement of the handheld device, the distance and angle between the handheld device and the gap may change continuously, resulting in unstable signal strength of the collected signal. Such fluctuation of signal strength will affect the accuracy of the detection results. In addition, dust, dirt and other impurities are easily accumulated in the gap of the switch cabinet. These impurities will not only reduce the insulation performance and increase the risk of partial discharge, but also interfere with the detection results. Summary of the Invention

[0006] In view of the above problems, the present invention provides a partial discharge monitoring device and system to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a partial discharge monitoring device, comprising a traveling assembly, a support and adjustment assembly, a detection assembly, a cleaning assembly, and a guide probe assembly, wherein the traveling assembly is disposed below the support and adjustment assembly, the detection assembly and the cleaning assembly are both disposed on the support and adjustment assembly, and the guide probe assembly is disposed on the cleaning assembly;

[0008] The detection assembly includes a detector body, which is arranged above the support and adjustment assembly, and a detection head is provided at one end of the detector body;

[0009] The cleaning assembly includes a dust collection cylinder, which is arranged on one side of the detector body, a dust collection filter head is provided at one end of the dust collection cylinder, a movable bracket is provided on the surface of the dust collection cylinder, and a cylinder is provided on one side of the movable bracket;

[0010] The guide probe assembly includes a fixing seat, which is arranged at one end of the dust filter head. An elastic spring is arranged inside the fixing seat, and a probe head is arranged at one end of the elastic spring away from the fixing seat.

[0011] Preferably, a display screen is provided on the surface of the detector body, and a sensor assembly is provided inside the detector body;

[0012] The sensor assembly includes an ultrasonic sensor and a transient voltage sensor.

[0013] Preferably, a filter is provided at one end of the dust collection cylinder away from the dust collection filter head, a hose is provided at one end of the filter away from the dust collection cylinder, a vacuum pump is provided at one end of the hose away from the filter, and the vacuum pump is fixedly provided on the movable bracket.

[0014] Preferably, the surface of the dust suction filter head is provided with a dust suction port, and there are multiple dust suction ports, which are arranged in a ring shape on the surface of the dust suction filter head;

[0015] A ventilation groove is provided on one end of the dust collecting filter head close to the filter.

[0016] Preferably, a sliding groove adapted to the probe head is provided inside the fixing seat, and the end of the probe head away from the fixing seat is tapered;

[0017] A cleaning sleeve is provided on the surface of the probe head, and the cleaning sleeve is located at an end away from the fixing seat.

[0018] Preferably, the support and adjustment assembly includes an electric lifting rod, which is arranged above the walking assembly. A mounting frame is provided at one end of the electric lifting rod away from the walking assembly. A rotating frame is assembled on one side of the mounting frame. A monitoring frame is provided on the surface of the rotating frame. The detector body is arranged inside the monitoring frame, and a camera is provided on the rotating frame.

[0019] Preferably, a micro rotary motor is provided on one side of the mounting frame, an output shaft of the micro rotary motor is fixedly connected to the rotating frame, and a mounting hole is provided at the position where the mounting frame is connected to the micro rotary motor.

[0020] Preferably, a movable groove is provided at a position where the rotating frame is connected to the movable bracket, and one end of the cylinder away from the movable bracket is fixedly connected to the rotating frame.

[0021] Preferably, the traveling assembly includes a trolley chassis, the trolley chassis is equipped with traveling wheels, a support base is provided on the surface of the trolley chassis, and a fixing groove adapted to the electric lifting rod is provided inside the support base.

[0022] The present invention also provides a partial discharge monitoring system, comprising power equipment, terminal equipment and the partial discharge monitoring device described above, wherein the partial discharge monitoring device is used to detect the status of the power equipment and transmit the detection data to the terminal equipment via a wireless communication module, and the terminal equipment is used to receive and analyze the data from the partial discharge monitoring device, and evaluate and issue an early warning on the operating status of the power equipment based on the analysis results.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention sets a guide probe assembly. When the probe head moves along the surface of the switch cabinet, the pressure change between the probe head and the switch cabinet surface is monitored in real time by the pressure sensor. When the probe head enters or leaves the gap, the detection value of the pressure sensor will change. The position of the gap can be judged by the pressure change detected by the pressure sensor; when the pressure value returns to the preset value or becomes zero, it indicates that the probe head has reached the other end of the gap, thereby determining the starting point and end point of the gap. The movement of the probe head and the detection of the pressure sensor are controlled by the controller to achieve the purpose of gap positioning.

[0025] 2. The present invention sets a support and adjustment component, provides stable support and flexible angle adjustment through an electric lifting rod and a micro rotary motor, and ensures that the detection component can work stably at different positions and heights; the probe head and pressure sensor in the guide probe assembly can accurately locate the gaps on the surface of the switch cabinet, and clean the dust and impurities in the gaps through the dust collector in the cleaning component to avoid interference with the detection results by impurities. This cleaning and detection collaborative mechanism not only improves the detection accuracy, but also reduces the risk of local discharge caused by impurity accumulation, and extends the service life of the power equipment.

[0026] 3. The present invention uses ultrasonic detection data of the gap to conduct a comprehensive analysis based on the speed of the walking wheel and the GPS positioning of the trolley chassis, and can conclude that there is a phenomenon of partial discharge in a certain section of the gap. The position information is intercepted and recorded. During subsequent maintenance, the controller is called up and the device reproduces its motion trajectory based on the position information and the height of the position, so that maintenance personnel can quickly and clearly know the area to be repaired, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention from a first viewing angle;

[0028] Figure 2 This is a schematic diagram of the overall structure of the present invention from a second viewing angle;

[0029] Figure 3 This is a schematic diagram of the assembly structure of the walking assembly and the support adjustment assembly of the present invention;

[0030] Figure 4 For the present invention Figure 3 A magnified view of point A;

[0031] Figure 5 This is a schematic diagram of the mounting frame structure of the present invention;

[0032] Figure 6 This is a schematic diagram of the assembly structure of the cleaning component and the guide probe component of the present invention;

[0033] Figure 7This is a schematic diagram of the assembly structure of the fixing base and the dust collection filter head of the present invention;

[0034] Figure 8 This is a schematic diagram of the assembly structure of the dust collection cylinder and the filter of the present invention;

[0035] Figure 9 It is a partial cross-sectional schematic diagram of the fixing seat structure of the present invention.

[0036] In the figure: 1. Traveling assembly; 101. Trolley chassis; 102. Traveling wheels; 103. Support base; 2. Support and adjustment assembly; 201. Electric lifting rod; 202. Mounting frame; 203. Rotating frame; 204. Micro rotating motor; 205. Monitoring placement frame; 206. Camera; 3. Detection assembly; 301. Detector body; 302. Detection head; 303. Display screen; 4. Cleaning assembly; 401. Dust collection cylinder; 402. Dust collection filter; 4021. Dust collection port; 403. Filter; 404. Hose; 405. Vacuum pump; 406. Mobile bracket; 407. Cylinder; 5. Guide probe assembly; 501. Fixed seat; 502. Elastic spring; 503. Probe head; 504. Cleaning cover. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] like Figures 1 to 9 As shown, a partial discharge monitoring device of the present invention includes a walking component 1, a support and adjustment component 2, a detection component 3, a cleaning component 4 and a guide probe component 5. The walking component 1 is arranged below the support and adjustment component 2, the detection component 3 and the cleaning component 4 are both arranged on the support and adjustment component 2, and the guide probe component 5 is arranged on the cleaning component 4.

[0039] When in use, the walking component 1 is moved to the position of the power equipment to be monitored, and the support adjustment component 2 is adjusted according to the height and position of the power equipment, so that the detection component 3 and the cleaning component 4 are at a suitable working height. The power equipment is subjected to partial discharge detection through the detection component 3. That is, in the process of partial discharge detection of the switch cabinet, dust and other impurities in the gaps of the switch cabinet are cleaned through the cleaning component 4 to prevent impurities from interfering with the detection results. The gaps on the surface of the switch cabinet are detected and located through the guide probe component 5 to improve the detection effect.

[0040] like Figure 3 、 Figure 5As shown, the support and adjustment component 2 includes an electric lifting rod 201, which is arranged above the walking component 1. A mounting frame 202 is provided at one end of the electric lifting rod 201 away from the walking component 1. A rotating frame 203 is assembled on one side of the mounting frame 202. A monitoring placement frame 205 is provided on the surface of the rotating frame 203. The detector body 301 is arranged inside the monitoring placement frame 205. A camera 206 is provided on the rotating frame 203. By setting the camera 206, images of the power equipment can be captured in real time, providing maintenance personnel with an intuitive monitoring perspective.

[0041] During use, when it is necessary to detect the switch cabinet at different heights, the controller controls the electric lifting rod 201 to adjust the heights of the detection component 3 and the cleaning component 4 so that they can work at different heights.

[0042] like Figure 3 As shown, the walking component 1 includes a trolley chassis 101, on which walking wheels 102 are installed. A support base 103 is provided on the surface of the trolley chassis 101. A fixing groove adapted to the electric lifting rod 201 is provided inside the support base 103 for installing and fixing the electric lifting rod 201 to provide a stable support structure.

[0043] It is worth noting that the trolley chassis 101 is equipped with a GPS positioning system and an obstacle avoidance radar. By controlling the trolley chassis 101 to drive the running wheels 102, the entire partial discharge monitoring device is driven to move in all directions on the ground.

[0044] like Figure 4 As shown, the detection component 3 includes a detector body 301, which is arranged above the support and adjustment component 2. A detection head 302 is provided at one end of the detector body 301, a display screen 303 is provided on the surface of the detector body 301, and a sensor component is provided inside the detector body 301. The sensor component includes an ultrasonic sensor and a transient voltage sensor.

[0045] During use, when the detection head 302 is close to the surface of the power equipment, the ultrasonic sensor and transient ground voltage sensor built into the detector body 301 respectively detect the ultrasonic signal and transient ground voltage signal inside the power equipment. By detecting the intensity, frequency and pattern of these signals, it can be determined whether there is partial discharge in the power equipment and the severity of the discharge.

[0046] It is worth noting that the controller controls the detector body 301 to switch between different detection modes according to needs, that is, to switch between the ultrasonic sensor and the transient voltage sensor in the sensor assembly.

[0047] When performing transient ground voltage detection on a switchgear, multiple measuring points need to be manually tested. Due to the different heights of the measuring points, manual operation is inconvenient and inefficient when the measuring points are at a high position. The existing method cannot adjust the height of the detection component 3 in time according to the height of the measuring points. In order to solve this problem, the following methods are specifically adopted:

[0048] First, the controller controls the detector body 301 to switch to the transient ground voltage mode, and the transient ground voltage sensor switches the working mode. In order to improve the detection results, multiple test points are generally set for testing, that is, the front middle, front lower, side upper, side middle, side lower, rear middle, rear lower, and rear upper parts of the switch cabinet surface are detected. That is, the GPS positioning system and the camera 206 on the trolley chassis 101 in the walking component 1 need to cooperate with each other to achieve the purpose of positioning detection. First, the trolley chassis 101 drives the entire device to move to the specified position by driving the walking wheel 102. At this time, the detection head 302 in the detection component 3 faces one side of the switch cabinet, and then the controller controls the electric lifting rod 201 to adjust the position height of the detection component 3. Specifically, the controller controls the electric lifting rod 201 to extend, and the electric lifting rod 201 drives the installation The rack 202, the rotating rack 203, the monitoring placement rack 205 and the detector body 301 move together in a direction away from the trolley chassis 101, so that the detection head 302 reaches the preset position height. Then the controller controls the walking wheel 102 in the walking component 1 to move in the direction close to the switch cabinet. During this process, the detection head 302 is in contact with the surface of the switch cabinet and stays for a few seconds. The detection data is obtained through the transient voltage sensor. The detection results can be displayed on the display screen 303. At the same time, the detection data is transmitted to the terminal device in real time through the wireless communication module. The detection data is compared with the reference range of relative values ​​under different background values ​​to determine whether a significant discharge phenomenon occurs at this location. If a strong discharge phenomenon is detected at this location, the camera 206 is used to take a photo and save it to provide information for subsequent maintenance personnel. The terminal device processes and analyzes the detection data in real time through data analysis, which can timely evaluate the operating status of the power equipment, provide early warning and decision support, and effectively ensure the safe operation of the power equipment.

[0049] After the position detection is completed, the controller controls the walking wheel 102 in the walking component 1 to return to the initial position, and then continues to adjust the position height of the detection component 3 through the support adjustment component 2, thereby realizing partial discharge detection of measurement points at different position heights on one side of the switch cabinet.

[0050] When performing ultrasonic testing on switchgear, partial discharge inside the switchgear will generate ultrasonic signals, but the signals generated by partial discharge are usually weak. Based on the propagation characteristics of ultrasonic waves and the detection sensitivity, ultrasonic testing is generally performed along the gaps of the switchgear using a handheld partial discharge monitoring device. This facilitates the effective detection of ultrasonic signals generated by partial discharge, thereby promptly discovering insulation defects inside the switchgear.

[0051] During the process of ultrasonic detection along the gaps of the switch cabinet using a manual handheld partial discharge monitoring device, the manual handheld device cannot move stably along the gaps of the switch cabinet, and the positioning error of the switch cabinet gaps by human visual observation is large, affecting the detection accuracy; during the movement of the handheld device, the distance and angle between the handheld device and the gap may change continuously, resulting in unstable collected signal strength, and this fluctuation in signal strength will affect the accuracy of the detection results; and impurities such as dust and dirt are easily accumulated in the gaps of the switch cabinet. These impurities will not only reduce the insulation performance and increase the risk of partial discharge, but also interfere with the detection results.

[0052] In order to solve the above problems, the partial discharge monitoring device further includes:

[0053] like Figure 5 As shown, a micro rotary motor 204 is provided on one side of the mounting frame 202 , the output shaft of the micro rotary motor 204 is fixedly connected to the rotating frame 203 , and a mounting hole is provided at the position where the mounting frame 202 and the micro rotary motor 204 are connected.

[0054] During use, the controller controls the micro rotary motor 204 to rotate, and the micro rotary motor 204 drives the rotating frame 203 to rotate by a preset angle, thereby adjusting the position angles of the detection component 3 and the cleaning component 4.

[0055] like Figure 6 As shown, the cleaning component 4 includes a dust collection cylinder 401, which is arranged on one side of the detector body 301, and a dust collection filter head 402 is arranged at one end of the dust collection cylinder 401, and a filter 403 is arranged at the end of the dust collection cylinder 401 away from the dust collection filter head 402, and a hose 404 is arranged at the end of the filter 403 away from the dust collection cylinder 401, and a vacuum pump 405 is arranged at the end of the hose 404 away from the filter 403, and the vacuum pump 405 is fixedly arranged on the movable bracket 406.

[0056] like Figure 7 、 Figure 8 As shown, a dust suction port 4021 is provided on the surface of the dust suction filter head 402 . There are multiple dust suction ports 4021 , which are arranged in a ring shape on the surface of the dust suction filter head 402 . A ventilation groove is provided at one end of the dust suction filter head 402 close to the filter 403 .

[0057] During use, when the controller controls the vacuum pump 405 to start, negative pressure will be generated in the dust collection cylinder 401, so that the nearby air will carry dust and other impurities into the dust collection cylinder 401 from the dust collection port 4021 of the dust collection filter head 402, and then enter the filter 403 through the ventilation groove for filtration. Dust and other impurities will remain in the filter 403, and the filtered air will pass through the hose 404 and be discharged from the exhaust port of the vacuum pump 405.

[0058] like Figure 5 、 Figure 6 As shown, a movable bracket 406 is provided on the surface of the dust collector 401, a cylinder 407 is provided on one side of the movable bracket 406, a movable groove is provided at the position where the rotating frame 203 is connected to the movable bracket 406, and the end of the cylinder 407 away from the movable bracket 406 is fixedly connected to the rotating frame 203.

[0059] During use, the controller controls the cylinder 407 , which pushes the movable bracket 406 , the dust collection cylinder 401 and the dust collection filter head 402 toward the switch cabinet. That is, under the action of the cylinder 407 , the cleaning assembly 4 moves as a whole.

[0060] like Figure 7 、 Figure 9 As shown, the guide probe assembly 5 includes a fixing seat 501, which is arranged at one end of the dust filter head 402, an elastic spring 502 is arranged inside the fixing seat 501, and a probe head 503 is arranged at the end of the elastic spring 502 away from the fixing seat 501.

[0061] A sliding groove adapted to the probe head 503 is provided inside the fixing seat 501 . The end of the probe head 503 away from the fixing seat 501 is tapered. A cleaning sleeve 504 is provided on the surface of the probe head 503 . The cleaning sleeve 504 is located at the end away from the fixing seat 501 .

[0062] During use, the elastic spring 502 and the probe head 503 are arranged in cooperation to ensure that the probe head 503 contacts the surface of the switch cabinet and avoids damage to the probe head 503 or damage to the switch cabinet surface due to rigid collision when moving. The conical end of the probe head 503 contacts the surface of the switch cabinet to reduce the contact area and avoid damage.

[0063] It is worth noting that a pressure sensor is provided inside the probe head 503. When the probe head 503 is moved on the surface of the switch cabinet, the pressure sensor can detect the pressure change on the probe head 503, thereby determining whether a gap appears at a certain position.

[0064] First, the controller switches the detector body 301 to ultrasonic mode, and the ultrasonic sensor switches its working mode. Then, the trolley chassis 101 drives the entire device to a designated position by driving the running wheels 102. The ultrasonic measurement method uses a non-contact method, that is, the distance between the detection head 302 and the surface of the switch cabinet is a preset distance, which facilitates signal collection. Because there are horizontal and vertical gaps on the surface of the switch cabinet, the direction of the detection head 302 needs to be adjusted according to the direction of the gap. If it is a horizontal gap, the detection head 302 should be placed horizontally. If it is a vertical gap, the detection head 302 should be placed vertically. Specifically, the controller controls the micro-rotating motor 204 to turn on. The micro-rotating motor 204 drives the rotating frame 203 to rotate 90 degrees together, thereby causing the detection component 3, the cleaning component 4, and the guide probe component 5 to rotate 90 degrees along with the rotating frame 203. That is, the detection head 302 changes from a horizontal position to a vertical position.

[0065] In the initial state, the detection head 302 on the detection component 3 is placed horizontally (eg Figure 1As shown, when ultrasonic testing is performed on the horizontal and vertical gaps on the switch cabinet, the controller first controls the electric lift rod 201 to retract. Under the action of the electric lift rod 201, the detection assembly 3, cleaning assembly 4, and guide probe assembly 5 are positioned at a preset height. That is, the detection assembly 3, cleaning assembly 4, and guide probe assembly 5 are located at the lower part of the switch cabinet surface. Ultrasonic testing begins from the lower part of the switch cabinet. To ensure a comprehensive test, the switch cabinet is tested from the bottom up. For ease of description, an example is given. During ultrasonic testing of horizontal gaps, the controller first controls the cylinder 407. The cylinder 407 pushes the movable bracket 406 toward the switch cabinet. During this process, the movable bracket 406 drives the dust collection cylinder 401, dust collection filter head 402, and fixed base 501 to move together. That is, under the action of the cylinder 407, the cleaning assembly 4 and guide probe assembly 5 move a preset distance, so that the probe head 503 contacts the surface of the switch cabinet. At this time, the elastic spring 502 is compressed, and the pressure sensor in the probe head 503 detects the preset pressure value. , then the controller controls the electric lifting rod 201 to extend, under the action of the electric lifting rod 201, the detection component 3, the cleaning component 4 and the guide probe component 5 move together with the electric lifting rod 201 in the direction away from the trolley chassis 101. During this process, the probe head 503 moves from bottom to top along the surface of the switch cabinet. When the detection value of the pressure sensor in the probe head 503 is less than the preset pressure value, it indicates that the compression amount of the elastic spring 502 is reduced, that is, the length of the probe head 503 extending out of the fixed seat 501 is increased. It is preliminarily judged that there is a gap at this position, and then the controller controls the walking wheel 102 to make the trolley The chassis 101 moves horizontally, so that the entire device moves horizontally together, that is, the probe head 503 makes a lateral horizontal movement. During this process, the pressure change on the probe head 503 is detected by the pressure sensor to determine whether there is a gap. By calculating the difference between the detection value of the pressure sensor and the preset pressure value, if the difference between the detection value of the pressure sensor and the preset pressure value is within the standard range, it is determined that there is a gap at this position and the probe head 503 is located at the gap. During the horizontal movement, the cleaning sleeve 504 on the probe head 503 can clean and loosen impurities such as dust and dirt in the gap. When the controller starts the vacuum pump 405, the vacuum pump 405 generates airflow through the high-speed rotating impeller (the existing technology will not be described in detail here), thereby generating negative pressure in the dust collection cylinder 401. At this time, under the action of the negative pressure of the dust collection cylinder 401, the probe head 503 and impurities such as dust and dirt in the gaps enter the dust collection cylinder 401 along with the air through the dust suction port 4021 of the dust collection filter head 402, and then enter the filter 403 through the ventilation groove for filtration. Dust and other impurities remain in the filter 403. The filtered air passes through the hose 404 and is discharged from the exhaust port of the vacuum pump 405, thereby achieving the purpose of cleaning the gaps.

[0066] In the above process, if the detection value of the pressure sensor returns to the preset pressure value or the detection value of the pressure sensor is zero, it indicates that the probe head 503 has reached the end point of one end of the gap and records the position information. At this time, the controller needs to control the walking wheel 102 to make the trolley chassis 101 move in the opposite direction and repeat the above operation to obtain the end point of the other end of the gap. At this time, the controller controls the walking wheel 102 to stop the trolley chassis 101 from moving. The probe head 503 is now located at the end point of the other end of the gap. At the same time, the controller controls the vacuum pump 405 to turn it off, that is, the gap is cleaned. At this time, the position information and length of the gap are known. Then the controller controls the cylinder 407, and the cylinder 407 drives the movable bracket 406 to move away from the switch cabinet. Under the action of the cylinder 407, the cleaning assembly 4 and the guide probe assembly 5 are restored to their initial positions. At this time, the probe head 503 is separated from the switch cabinet to avoid the noise generated by the contact between the probe head 503 and the switch cabinet affecting the subsequent ultrasonic detection.

[0067] It is worth noting that since the fixed seat 501, the elastic spring 502 and the probe head 503 cooperate with each other, when encountering resistance, the elastic spring 502 is compressed, and the probe head 503 will move along the sliding groove inside the fixed seat 501 toward the fixed seat 501, that is, when the probe head 503 enters the gap on the switch cabinet or comes out of the gap, it will not cause motion interference, causing damage to the probe head 503.

[0068] According to the position information and length of the gap, the controller controls the walking wheel 102 to move the trolley chassis 101 along the gap, so that the detection head 302 moves horizontally and stably along the gap. At this time, the ultrasonic sensor inside the detector body 301 starts detection and transmits the detection data to the terminal device through the wireless communication module. The terminal device is used to receive and analyze the ultrasonic detection data. If the measurement value of the ultrasonic sensor is within the normal range, it indicates that there is no obvious discharge phenomenon at this position and it can operate normally; if the measurement value of the ultrasonic sensor exceeds the maximum threshold of the normal range, it indicates that there is obvious discharge phenomenon at this position, and an early warning is issued to notify the maintenance personnel to perform maintenance.

[0069] Through the ultrasonic detection data of the gap, a comprehensive analysis is performed based on the speed of the walking wheel 102 and the GPS positioning of the trolley chassis 101, and it can be concluded that there is a phenomenon of local discharge in a certain section of the gap. The position information is intercepted and recorded. During subsequent maintenance, the controller is called up and the device reproduces its motion trajectory based on the position information and the position height, so that maintenance personnel can quickly and clearly know the area to be repaired and improve work efficiency.

[0070] It is worth noting that when locating the horizontal gap on the switch cabinet, the probe head 503 is first moved in the vertical direction on the switch cabinet, that is, the movement trajectory of the probe head 503 is perpendicular to the horizontal gap, and then the position of the horizontal gap is determined by the pressure change value of the pressure sensor in the probe head 503; on the contrary, when locating the vertical gap on the switch cabinet, the probe head 503 is first moved in the horizontal direction on the switch cabinet, that is, the movement trajectory of the probe head 503 is perpendicular to the vertical gap, and then the position of the vertical gap is determined by the pressure change value of the pressure sensor in the probe head 503.

[0071] Gaps are often high-risk areas for partial discharge. Accurate gap positioning can timely detect potential partial discharge points. By controlling the movement of the probe head 503 and the detection of the pressure sensor through the controller, an automated process for gap positioning is realized. Both horizontal and vertical gaps can be accurately detected to avoid detection errors caused by position deviation. The gap positioning process is fully automated and does not require manual hand-held operation, which reduces human errors and improves detection efficiency.

[0072] The present invention also provides a partial discharge monitoring system, comprising power equipment, terminal equipment and the above-mentioned partial discharge monitoring device. The partial discharge monitoring device is used to detect the status of the power equipment and transmit the detection data to the terminal equipment through a wireless communication module. The terminal equipment is used to receive and analyze the data of the partial discharge monitoring device, and evaluate and issue an early warning on the operating status of the power equipment based on the analysis results.

[0073] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0074] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A partial discharge monitoring device, characterized in that: The invention comprises a walking assembly (1), a support and adjustment assembly (2), a detection assembly (3), a cleaning assembly (4) and a guide probe assembly (5), wherein the walking assembly (1) is arranged below the support and adjustment assembly (2), the detection assembly (3) and the cleaning assembly (4) are both arranged on the support and adjustment assembly (2), and the guide probe assembly (5) is arranged on the cleaning assembly (4); The detection assembly (3) comprises a detector body (301), the detector body (301) is arranged above the support adjustment assembly (2), and a detection head (302) is provided at one end of the detector body (301); The cleaning assembly (4) includes a dust collection cylinder (401), the dust collection cylinder (401) is arranged on one side of the detector body (301), a dust collection filter (402) is arranged at one end of the dust collection cylinder (401), a movable bracket (406) is arranged on the surface of the dust collection cylinder (401), and a cylinder (407) is arranged on one side of the movable bracket (406); The guide probe assembly (5) comprises a fixing seat (501), the fixing seat (501) being arranged at one end of the dust filter head (402), an elastic spring (502) being arranged inside the fixing seat (501), and a probe head (503) being arranged at one end of the elastic spring (502) away from the fixing seat (501).

2. The partial discharge monitoring device according to claim 1, characterized in that: A display screen (303) is provided on the surface of the detector body (301), and a sensor assembly is provided inside the detector body (301); The sensor assembly includes an ultrasonic sensor and a transient voltage sensor.

3. The partial discharge monitoring device according to claim 1, characterized in that: A filter (403) is provided at one end of the dust collection cylinder (401) away from the dust collection filter head (402), a hose (404) is provided at one end of the filter (403) away from the dust collection cylinder (401), and a vacuum pump (405) is provided at one end of the hose (404) away from the filter (403), and the vacuum pump (405) is fixedly mounted on the movable bracket (406).

4. The partial discharge monitoring device according to claim 3, characterized in that: The surface of the dust suction filter head (402) is provided with a dust suction port (4021), and there are a plurality of dust suction ports (4021), which are arranged in a ring shape on the surface of the dust suction filter head (402); A ventilation groove is provided at one end of the dust collecting filter head (402) close to the filter (403).

5. The partial discharge monitoring device according to claim 1, characterized in that: A sliding groove adapted to the probe head (503) is provided inside the fixing seat (501), and the end of the probe head (503) away from the fixing seat (501) is tapered; A cleaning sleeve (504) is provided on the surface of the probe head (503), and the cleaning sleeve (504) is located at an end away from the fixing seat (501).

6. The partial discharge monitoring device according to claim 1, characterized in that: The support and adjustment assembly (2) comprises an electric lifting rod (201), the electric lifting rod (201) being arranged above the walking assembly (1), a mounting frame (202) being arranged at one end of the electric lifting rod (201) away from the walking assembly (1), a rotating frame (203) being assembled on one side of the mounting frame (202), a monitoring placement frame (205) being arranged on the surface of the rotating frame (203), the detector body (301) being arranged inside the monitoring placement frame (205), and a camera (206) being arranged on the rotating frame (203).

7. The partial discharge monitoring device according to claim 6, characterized in that: A micro-rotating motor (204) is provided on one side of the mounting frame (202), an output shaft of the micro-rotating motor (204) is fixedly connected to the rotating frame (203), and a mounting hole is provided at a position where the mounting frame (202) and the micro-rotating motor (204) are connected.

8. The partial discharge monitoring device according to claim 6, characterized in that: A movable groove is provided at a position where the rotating frame (203) is connected to the movable bracket (406), and one end of the cylinder (407) away from the movable bracket (406) is fixedly connected to the rotating frame (203).

9. The partial discharge monitoring device according to claim 1, characterized in that: The walking assembly (1) comprises a trolley chassis (101), the trolley chassis (101) is equipped with walking wheels (102), a support base (103) is provided on the surface of the trolley chassis (101), and a fixing groove adapted to the electric lifting rod (201) is provided inside the support base (103).

10. A partial discharge monitoring system comprising power equipment, terminal equipment, and the partial discharge monitoring device according to any one of claims 1 to 9, characterized in that: The partial discharge monitoring device is used to detect the status of the power equipment and transmit the detection data to the terminal device through the wireless communication module. The terminal device is used to receive and analyze the data of the partial discharge monitoring device and evaluate and issue an early warning on the operating status of the power equipment based on the analysis results.

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