Partial discharge detection device

Abstract

A partial discharge detection device includes a motion control mechanism, a rotating mechanism and a detection mechanism; the rotating mechanism includes a support assembly and a rotating arm, the rotating arm is rotatably arranged on the support assembly, the supporting assembly is arranged on the motion control mechanism, and the support assembly and the rotating arm are respectively electrically connected to the motion control mechanism; the detection mechanism includes a detection body and an acoustic-electric combination detector, the detection body is arranged on the rotating arm, the acoustic-electric combination detector includes a magnetic signal device, an ultrasonic signal device and an acoustic-magnetic sensor, the magnetic signal device, the ultrasonic signal device and the acoustic-magnetic sensor are respectively arranged on the detection body, and the magnetic signal device, the ultrasonic signal device and the acoustic-magnetic sensor are respectively electrically connected to the motion control mechanism. The above-mentioned partial discharge detection device can detect latent defects such as partial discharge, has higher safety and effectiveness, better guarantees the safety of cables, can monitor environmental changes at any time, and then perform detection work, has a high degree of automation, is easy to operate, and is more practical.

Description

Technical Field

[0001] The invention relates to the field of detection technology, and in particular to a partial discharge detection device. Background Art

[0002] The insulation of power equipment is under the action of working voltage for a long time during operation. Especially with the increase of voltage level, the electric field strength value of the insulation is very high, and partial discharge is easy to occur at the weak insulation. Since the energy of partial discharge is small at the beginning, its discharge will not immediately cause insulation breakdown. The intact insulation between electrodes where discharge has not occurred can still withstand the operating voltage of the equipment. However, under long-term operating voltage, the insulation damage caused by partial discharge continues to develop, eventually leading to the occurrence of insulation accidents. According to statistics on the damage of transformers of 110KV and below in my country, 50% is caused by the gradual development of partial discharge under operating voltage.

[0003] At present, high-voltage power equipment uses non-voltage withstand and voltage withstand tests to check the insulation condition and prevent insulation breakdown accidents. Although this high-voltage withstand test method can indirectly or directly determine the reliability of insulation, it is difficult to detect latent defects such as partial discharge. In addition, the high-voltage withstand test process will also damage the insulation and reduce its life. Summary of the invention

[0004] Based on this, it is necessary to provide a partial discharge detection device to address the problem that the existing high-voltage withstand voltage test method is difficult to detect the latent defect of partial discharge and will also damage the insulation during the high-voltage withstand voltage test.

[0005] A partial discharge detection device comprises a motion control mechanism, a rotation mechanism and a detection mechanism;

[0006] The rotating mechanism comprises a supporting assembly and a rotating arm, the rotating arm is rotatably arranged on the supporting assembly, the supporting assembly is arranged on the motion control mechanism, and the supporting assembly and the rotating arm are electrically connected to the motion control mechanism respectively;

[0007] The detection mechanism includes a detection body and an acoustic-electric combination detector, the detection body is arranged on the rotating arm, the acoustic-electric combination detector includes a magnetic signal device, an ultrasonic signal device and an acoustic-magnetic sensor, the magnetic signal device, the ultrasonic signal device and the acoustic-magnetic sensor are respectively arranged on the detection body, and the magnetic signal device, the ultrasonic signal device and the acoustic-magnetic sensor are respectively electrically connected to the motion control mechanism.

[0008] In one of the embodiments, the detection mechanism further includes a pulse current partial discharge detector, which is disposed on the detection body and is electrically connected to the motion control mechanism.

[0009] In one embodiment, the motion control mechanism includes a main controller, a motion body, a pulley assembly, and a motion drive assembly;

[0010] The main controller is arranged on the moving body, and the moving driving assembly, the supporting assembly, the rotating arm, the magnetic signal device, the ultrasonic signal device and the acoustic magnetic sensor are electrically connected to the main controller respectively;

[0011] The pulley assembly is movably arranged on the moving body, the motion driving assembly is arranged on the moving body and drivingly connected to the pulley assembly, and the supporting assembly is arranged on the moving body.

[0012] In one of the embodiments, the pulley assembly includes at least one driving wheel and at least two universal wheels;

[0013] Each of the driving wheels and each of the universal wheels are movably arranged on the moving body, and the moving driving assembly is drivingly connected to each of the driving wheels and each of the universal wheels.

[0014] In one embodiment, the surface of each of the driving wheels and each of the universal wheels is provided with anti-slip grooves.

[0015] In one embodiment, the support assembly includes a bracket and a sliding member, the bracket is arranged on the motion control mechanism, the bracket is provided with a guide rail extending in a direction perpendicular to the motion control mechanism, the sliding member is slidably arranged on the guide rail, the sliding member is electrically connected to the motion control mechanism, and the rotating arm is rotatably arranged on the sliding member.

[0016] In one of the embodiments, the support assembly further includes a locking member, which is disposed on the sliding member, electrically connected to the motion control mechanism, and is used to lock or release the sliding member and the bracket.

[0017] In one embodiment, the sliding member is provided with a rotation axis extending in a direction parallel to the motion control mechanism, and the rotation arm is rotatably disposed on the rotation axis.

[0018] In one of the embodiments, the motion control mechanism is further provided with a lighting device, and the lighting device is electrically connected to the motion control mechanism.

[0019] In one embodiment, the partial discharge detection device further includes a communication module, and the communication module is electrically connected to the motion control mechanism, the magnetic signal device, the ultrasonic signal device and the acoustomagnetic sensor respectively.

[0020] The above-mentioned partial discharge detection device is provided with a motion control mechanism, and the detection mechanism is connected to the motion control mechanism through a rotating mechanism, so that the detection mechanism can perform long-term and large-scale inspection of the cable in the power tunnel through the rotation of the rotating mechanism and the movement of the motion control mechanism under the control of the motion control mechanism, and the fault point is detected by the acoustic-electric combined detector composed of the magnetic signal device, the ultrasonic signal device and the acoustic-magnetic sensor in the detection mechanism, and the position of the partial discharge fault point is accurately detected. Compared with the prior art, it can detect latent defects such as partial discharge, and the automatic inspection using the motion control mechanism has higher safety and effectiveness than manual inspection, and the detection is more comprehensive, and the detection can be carried out uninterruptedly around the clock, which better ensures the safety of the cable, and the environmental changes can be monitored at any time, and then the detection work is carried out, with a high degree of automation, easy operation and stronger practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a partial discharge detection device according to an embodiment of the present invention;

[0022] Figure 2 It is a schematic structural diagram of a detection mechanism according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0024] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature. Furthermore, "above" and "below" in the present invention only indicate relative positions, and do not indicate absolute positions.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In one embodiment, a partial discharge detection device is provided. In this application, partial discharge detection refers to partial discharge detection. Figure 1 and Figure 2 As shown, the partial discharge detection device 10 includes: a motion control mechanism 100, a rotating mechanism 200 and a detection mechanism 300; the rotating mechanism 200 includes a support assembly 210 and a rotating arm 220, the rotating arm 220 is rotatably arranged on the support assembly 210, the support assembly 210 is arranged on the motion control mechanism 100, and the support assembly 210 and the rotating arm 220 are respectively electrically connected to the motion control mechanism 100; the detection mechanism 300 includes a detection body 310 and an acoustic-electric combined detector 320, the detection body 310 is arranged on the rotating arm, the acoustic-electric combined detector includes a magnetic signal device 321, an ultrasonic signal device 322 and an acoustic-magnetic sensor 323, the magnetic signal device 321, the ultrasonic signal device 322 and the acoustic-magnetic sensor 323 are respectively arranged on the detection body 310, and the magnetic signal device 321, the ultrasonic signal device 322 and the acoustic-magnetic sensor 323 are respectively electrically connected to the motion control mechanism 100.

[0028] The above-mentioned partial discharge detection device 10 is provided with a motion control mechanism 100, and a detection mechanism 300 is connected to the motion control mechanism 100 through a rotating mechanism 200, so that the detection mechanism 300 can perform a long-term and large-scale inspection of the cable in the power tunnel through the rotation of the rotating mechanism 200 and the movement of the motion control mechanism 100 under the control of the motion control mechanism 100, and the acoustic-electric combined detector 320 composed of a magnetic signal device 321, an ultrasonic signal device 322 and an acoustic-magnetic sensor 323 in the detection mechanism 300 detects the fault point and accurately finds the location of the partial discharge fault point. Compared with the prior art, it can detect latent defects such as partial discharge, and the automatic inspection using the motion control mechanism 100 has higher safety and effectiveness than manual inspection, and the detection is more comprehensive, and the detection can be carried out uninterruptedly around the clock, which better ensures the safety of the cable, and can monitor environmental changes at any time, and then perform detection work, with a high degree of automation, easy operation, and stronger practicality.

[0029] In this embodiment, the partial discharge detection device 10 is used to perform partial discharge detection on power transmission cables in power tunnels. Specifically, the motion control mechanism 100 is used to control the movement of the rotating mechanism 200 and the rotation of the detection mechanism 300, thereby changing the detection range of the detection mechanism 300 in the horizontal plane, and controlling the operation of the rotating mechanism 200 and the detection mechanism 300. Specifically, the rotating mechanism 200 is used to drive the detection mechanism 300 to rotate relative to the motion control mechanism 100, that is, relative to the environment, thereby changing the detection range of the detection mechanism 300. Specifically, the detection mechanism 300 is used to detect the fault point where partial discharge occurs, and accurately detect the location of the partial discharge fault point. Furthermore, when local discharge occurs in the cable, ultrasonic waves and electromagnetic waves are generated and radiate around the fault point. When the detection mechanism 300 detects ultrasonic and electromagnetic wave signals, since the propagation speed of electromagnetic waves is much greater than that of ultrasonic waves, and it can usually be considered that electromagnetic waves propagate at the speed of light, that is, the time taken for the electromagnetic wave signal to propagate from the fault point to the location of the detection mechanism 300 is considered to be 0, then the distance between the fault point and the location of the detection mechanism can be expressed as: the time difference between the detection of ultrasonic and electromagnetic wave signals multiplied by the ultrasonic propagation speed. Since the position to which the detection mechanism 300 runs is known, the position of the fault point can be obtained based on the distance between the fault point and the detection mechanism 300.

[0030] In order to accurately measure the electrical value of partial discharge, in one embodiment, as Figure 2As shown, the detection mechanism 300 also includes a pulse current partial discharge detector 330, which is arranged on the detection body 310 and is electrically connected to the motion control mechanism 100. By arranging the pulse current partial discharge detector, when the partial discharge detection device detects partial discharge during the inspection, the partial discharge electric quantity value can be accurately measured by the pulse current partial discharge detector. In this way, through the joint action of the pulse current partial discharge detector and the acoustic-electric combined detector, the location and electric quantity value of the partial discharge can be detected at the same time, and the specific situation of the partial discharge can be obtained.

[0031] In order to facilitate the movement of the partial discharge detection device in the power tunnel, in one embodiment, as Figure 1 As shown, the motion control mechanism 100 includes a main controller, a moving body 110, a pulley assembly 120 and a motion drive assembly; the main controller is arranged on the moving body 110, and the motion drive assembly, the support assembly 210, the rotating arm 220, the magnetic signal device 321, the ultrasonic signal device 322 and the acoustic magnetic sensor 323 are respectively electrically connected to the main controller; the pulley assembly 120 is movably arranged on the moving body 110, the motion drive assembly is arranged on the moving body 110 and is drivingly connected to the pulley assembly 120, and the support assembly 210 is arranged on the moving body 110. In this embodiment, the main controller and the motion drive assembly are arranged in the moving body 110. The motion drive assembly is used to drive the pulley assembly to move, and the wheel pulley assembly is used to move in the power tunnel under the drive of the motion drive assembly to drive the detection mechanism to detect the power tunnel. In this way, by setting the motion drive assembly and the pulley assembly, the partial discharge detection device can move in the power tunnel to perform partial discharge detection on the power tunnel.

[0032] In order to facilitate the control of the rotation of the partial discharge detection device, in one embodiment, the pulley assembly includes at least one driving wheel and at least two universal wheels; each of the driving wheels and each of the universal wheels is movably arranged on the moving body, and the motion driving assembly is drivingly connected to each of the driving wheels and each of the universal wheels. In this way, by providing the driving wheels and the universal wheels, the partial discharge detection device can be conveniently controlled to rotate in various directions, so that the detection range of the partial discharge detection device is wider.

[0033] In order to prevent the partial discharge detection device from losing control during the inspection of the power tunnel, in one embodiment, the surface of each of the driving wheels and each of the universal wheels is provided with anti-skid grooves. By providing anti-skid grooves on the driving wheels and the universal wheels, the partial discharge detection device is prevented from slipping during the inspection process, thereby preventing the partial discharge detection device from losing control during the inspection of the power tunnel.

[0034] In order to facilitate the adjustment of the height of the detection mechanism, in one embodiment, as Figure 1 As shown, the support assembly 210 includes a bracket 211 and a sliding member 212. The bracket 211 is arranged on the motion control mechanism 100. The bracket 211 is provided with a guide rail extending in a direction perpendicular to the motion control mechanism 100. The sliding member 212 is slidably arranged on the guide rail. The sliding member 212 is electrically connected to the motion control mechanism 100. The rotating arm 220 is rotatably arranged on the sliding member 212.

[0035] In order to fix the sliding member, in one embodiment, the support assembly further includes a locking member, which is disposed on the sliding member, is electrically connected to the motion control mechanism, and is used to lock or release the sliding member and the bracket. By setting the locking member, the sliding member can be fixed when the sliding member is adjusted to a suitable position.

[0036] In order to drive the detection mechanism to rotate, in one embodiment, the sliding member is provided with a rotation axis extending in a direction parallel to the motion control mechanism, and the rotation arm is rotatably disposed on the rotation axis.

[0037] In order to adapt to the dark environment in the power tunnel, in one embodiment, the motion control mechanism is also provided with a lighting device, and the lighting device is electrically connected to the motion control mechanism. By providing the lighting device on the partial discharge detection device, the partial discharge detection device can provide lighting inside the power tunnel when inspecting the power tunnel, thereby adapting to the dark environment in the power tunnel.

[0038] In order to send the information when a partial discharge fault is detected to the background so that the staff can deal with the fault in time, in one embodiment, the partial discharge detection device also includes a communication module, and the communication module is electrically connected to the motion control mechanism, the magnetic signal device, the ultrasonic signal device and the acoustic magnetic sensor. In this way, by setting up the communication module, the motion control mechanism can send the signals detected by the magnetic signal device, the ultrasonic signal device and the acoustic magnetic sensor to the background server through the communication module, so that the staff can obtain the information of the fault in time and deal with it in time.

[0039] In one embodiment, the communication module is a wireless communication module. In one embodiment, the communication module is a 3G / 4G wireless communication module. In one embodiment, the communication module is a WIFI (WIreless-FIdelity) communication module. In this embodiment, the communication module is a wireless module, so that the communication module can access the network wirelessly to achieve communication connection with the backend server.

[0040] In order to enable the staff to find the partial discharge fault in time, in one embodiment, the partial discharge detection device also includes an alarm mechanism, which is arranged on the motion control mechanism and electrically connected to the motion control mechanism. The motion control mechanism is also used to control the alarm mechanism to start working when a partial discharge fault is detected, that is, the motion control mechanism is also used to control the alarm mechanism to sound an alarm when a partial discharge fault is detected. In one embodiment, the alarm mechanism is a sound alarm, and the sound alarm is a buzzer. In one embodiment, the alarm mechanism is a light alarm, and the light alarm is an LED indicator. In one embodiment, the alarm mechanism is an audible and visual alarm.

[0041] In order to enable the partial discharge detection device to work when the power is off, in one embodiment, the partial discharge detection device further includes a battery, which is mounted on the motion control mechanism and electrically connected to the motion control mechanism. The battery is used to power the partial discharge detection device. In this way, the partial discharge detection device is powered by the battery, so that the infrared detection robot can be used normally without being plugged in, so that the infrared detection robot does not need to be plugged in and out, and the range of movement is not limited by cables and sockets, which increases the flexibility of the infrared detection robot.

[0042] In order to more comprehensively detect the power tunnel, in one embodiment, a rotating assembly is provided on the sliding member, and the rotating arm is rotatably provided on the sliding member through the rotating assembly, and the rotating assembly includes a rotating motor, a rotating shaft and a rotating member, and the rotating motor is electrically connected to the motion control mechanism, the rotating motor is drivingly connected to the rotating shaft, the rotating shaft is connected to the rotating member, and the rotating arm is connected to the rotating member. In this way, the rotating motor drives the rotating member to rotate through the rotating shaft, so that the rotating arm connected to the rotating member can rotate in the power tunnel, and the power tunnel can be more comprehensively detected in 360 degrees.

[0043] In order to control the speed of the rotating assembly, in one embodiment, the rotating assembly further includes a gear set, and the rotating shaft is connected to the rotating member through the gear set. In one embodiment, the gear set includes a first rotating gear arranged on the rotating shaft, a second rotating gear arranged on a surface of the rotating member facing away from the rotating arm, and a third rotating gear respectively meshed with the first rotating gear and the second rotating gear, that is, the first rotating gear is connected to the second rotating gear through the third rotating gear. In one embodiment, the diameter of the first rotating gear is smaller than the diameter of the second rotating gear, and the diameter of the second rotating gear is larger than the diameter of the third rotating gear. In this way, since the diameter of the second rotating gear is larger and the diameter of the first rotating gear is smaller, the rotation speed of the second rotating gear is smaller than the rotation speed of the first rotating gear, and the third rotating gear further reduces the speed of the second rotating gear, thereby controlling the speed of the rotating assembly, and the rotating motor drives the gear set to rotate through the rotating shaft, and the rotation of the gear set drives the rotation of the rotating member, and the rotating member drives the rotating arm to rotate, thereby limiting the rotation speed of the rotating arm, so that the detection mechanism can more accurately detect whether a partial discharge fault occurs at each position.

[0044] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A partial discharge detection device, characterized in that: The partial discharge detection device comprises: a motion control mechanism, a rotation mechanism and a detection mechanism; The rotating mechanism comprises a supporting assembly and a rotating arm, the rotating arm is rotatably arranged on the supporting assembly, the supporting assembly is arranged on the motion control mechanism, and the supporting assembly and the rotating arm are electrically connected to the motion control mechanism respectively; The detection mechanism includes a detection body and an acoustic-electric combination detector, the detection body is arranged on the rotating arm, the acoustic-electric combination detector includes a magnetic signal device, an ultrasonic signal device and an acoustic-magnetic sensor, the magnetic signal device, the ultrasonic signal device and the acoustic-magnetic sensor are respectively arranged on the detection body, and the magnetic signal device, the ultrasonic signal device and the acoustic-magnetic sensor are respectively electrically connected to the motion control mechanism; The support assembly includes a bracket and a sliding member, the bracket is arranged on the motion control mechanism, a guide rail extending in a direction perpendicular to the motion control mechanism is arranged on the bracket, the sliding member is slidably arranged on the guide rail, the sliding member is electrically connected to the motion control mechanism, and the rotating arm is rotatably arranged on the sliding member; The sliding member is provided with a rotating assembly, and the rotating arm is rotatably arranged on the sliding member through the rotating assembly. The rotating assembly includes a rotating motor, a rotating shaft, a rotating member and a gear set. The rotating motor is electrically connected to the motion control mechanism, and the rotating motor is drivingly connected to the rotating shaft. The rotating shaft is connected to the rotating member through the gear set, and the rotating arm is connected to the rotating member; the gear set includes a first rotating gear arranged on the rotating shaft, a second rotating gear arranged on a surface of the rotating member facing away from the rotating arm, and a third rotating gear respectively meshed with the first rotating gear and the second rotating gear, that is, the first rotating gear is connected to the second rotating gear through the third rotating gear, the diameter of the first rotating gear is smaller than the diameter of the second rotating gear, and the diameter of the second rotating gear is larger than the diameter of the third rotating gear.

2. The partial discharge detection device according to claim 1, characterized in that: The detection mechanism further comprises a pulse current partial discharge detector, which is arranged on the detection body and is electrically connected to the motion control mechanism.

3. The partial discharge detection device according to claim 1, characterized in that: The motion control mechanism includes a main controller, a motion body, a pulley assembly and a motion drive assembly; The main controller is arranged on the moving body, and the moving driving assembly, the supporting assembly, the rotating arm, the magnetic signal device, the ultrasonic signal device and the acoustic magnetic sensor are electrically connected to the main controller respectively; The pulley assembly is movably arranged on the moving body, the motion driving assembly is arranged on the moving body and drivingly connected to the pulley assembly, and the supporting assembly is arranged on the moving body.

4. The partial discharge detection device according to claim 3, characterized in that: The pulley assembly includes at least one driving wheel and at least two universal wheels; Each of the driving wheels and each of the universal wheels are movably arranged on the moving body, and the moving driving assembly is drivingly connected to each of the driving wheels and each of the universal wheels.

5. The partial discharge detection device according to claim 4, characterized in that: The surfaces of the driving wheels and the universal wheels are provided with anti-skid patterns.

6. The partial discharge detection device according to claim 1, characterized in that: The support assembly further comprises a locking member, which is disposed on the sliding member and electrically connected to the motion control mechanism, and is used to lock or release the sliding member and the bracket.

7. The partial discharge detection device according to claim 1, characterized in that: The motion control mechanism is also provided with an illumination device, and the illumination device is electrically connected to the motion control mechanism.

8. The partial discharge detection device according to claim 1, characterized in that: The partial discharge detection device further comprises a communication module, and the communication module is electrically connected to the motion control mechanism, the magnetic signal device, the ultrasonic signal device and the acoustomagnetic sensor respectively.

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