A detection device for detecting partial discharge of a power transformation equipment

Abstract

This invention relates to a detection device for detecting partial discharge in substation equipment, comprising an ultrasonic sensor module 1, a preamplifier 2, an IED front-end detection unit 3, a detection host 4, and an IED memory 5. The ultrasonic sensor module 1 is connected to the IED front-end detection unit 3 via the preamplifier 2, and the IED memory 5 is also connected to the IED front-end detection unit 3. The IED front-end detection unit 3 communicates with the detection host 4. The ultrasonic sensor module 1 includes an ultrasonic sensor 11 and a sensor protection unit 12. The ultrasonic sensor 11 is installed within the sensor protection unit 12, which is mounted on a substation inspection robot. Compared with existing technologies, this invention has advantages such as effectively preventing damage to the ultrasonic sensor due to excessive robot movement, safety and reliability, and strong versatility.

Description

Technical Field

[0001] This invention relates to the field of partial discharge detection technology for power equipment, and in particular to a detection device for detecting partial discharge in power equipment. Background Technology

[0002] Partial discharge is a sign and manifestation of insulation degradation in transformers, GIS (Gas Insulation System), and other power transmission equipment, and it is also a cause of further insulation degradation. Because the consequences of insulation breakdown are often severe, partial discharge detection in transformers, GIS, and other power transmission equipment is particularly important. Currently, when detecting partial discharge in power transmission equipment, since the equipment has a sealed cavity structure and contact ultrasonic sensors have high sensitivity, inspectors typically use contact ultrasonic sensors for ultrasonic testing.

[0003] Currently, substation robots are widely used. For example, Chinese patent CN206871367U discloses a substation inspection robot with ultrasonic sensors installed around its base. Testing instruments that use robots for substation fault detection are also widely used. During robot inspections, ultrasonic sensors are mounted on the robot, and the robot's movement causes the sensors to adhere to the outer walls of various cavities in the substation equipment for detection. However, due to the significant movements of the robot, the ultrasonic sensors are easily damaged when adhering to the substation equipment. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a detection device for detecting partial discharge in power equipment that effectively prevents ultrasonic sensors from being damaged by excessive robot movements, is safe, reliable, and versatile.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A detection device for detecting partial discharge in substation equipment is disclosed. The device is mounted on a substation inspection robot and includes an ultrasonic sensor module 1, a preamplifier 2, an IED front-end detection unit 3, a detection host 4, and an IED memory 5. The ultrasonic sensor module 1 is connected to the IED front-end detection unit 3 via the preamplifier 2. The IED memory 5 is also connected to the IED front-end detection unit 3. The IED front-end detection unit 3 communicates with the detection host 4. The ultrasonic sensor module 1 includes an ultrasonic sensor 11 and a sensor protection unit 12. The ultrasonic sensor 11 is installed within the sensor protection unit 12, which is mounted on the substation inspection robot.

[0007] Preferably, the sensor protection unit 12 includes a protective housing 1201, a connecting structure 1202, a driving structure 1203, a guide post 1204, a moving plate 1205, a mounting plate 1206, and a first spring 1207.

[0008] The guide post 1204, the movable plate 1205, the mounting plate 1206 and the first spring 1207 are respectively installed inside the protective housing 1201; the connecting structure 1202 and the driving structure 1203 are installed on the protective housing 1201.

[0009] One end of the guide post 1204 is connected to the front panel of the protective housing 1201, and the other end is connected to the rear panel of the protective housing 1201.

[0010] The movable plate 1205 and the mounting plate 1206 are respectively movably connected to the guide post 1204. The movable plate 1205 is installed on the rear panel side of the housing, and the mounting plate 1206 is installed on the front panel side of the housing.

[0011] The first spring 1207 is sleeved on the guide post 1204 and installed between the movable plate 1205 and the mounting plate 1206;

[0012] The ultrasonic sensor 11 is mounted on the mounting plate 1206;

[0013] The front panel of the protective housing 1201 is provided with an active hole 1208 for the ultrasonic sensor 11 to pass through;

[0014] The sensor protection unit 12 is connected to the inspection robot through the connection structure 1202.

[0015] More preferably, the drive structure 1203 includes a drive motor 12031 and a lead screw 12032; the drive motor 12031 is fixed on the rear plate of the protective housing 1201; the movable plate 1205 is provided with a threaded hole; the lead screw 12032 passes through the threaded hole and is movably connected to the movable plate 1205; one end of the lead screw 12032 is connected to the drive motor 12031.

[0016] More preferably, the drive structure 1203 is provided with a limiting substructure 12033; the limiting substructure 12033 is installed at the other end of the lead screw 12032.

[0017] More preferably, the limiting substructure 12033 is a retaining ring or a retaining block.

[0018] More preferably, the mounting plate 1206 includes a base plate 12061, a clamping block 12062, and a pressing structure 12063; the base plate 12061 is provided with a through hole 12064 for the guide post 1204 to pass through and a sliding groove 12065 for accommodating the pressing structure 12063; the clamping block 12062 is movably connected to the base plate 12061; and the pressing structure 12063 is connected to the clamping structure 12062.

[0019] More preferably, the clamping structure 12063 includes a guide post 120631, a second spring 120632, and a slider 120633; both ends of the guide post 120631 are respectively connected to both ends of the sliding groove 12065; the bottom of the clamping block 12062 is provided with a through hole for the guide post 120631 to pass through; the clamping block 12062 is movably connected to the guide post 120631 through the through hole; the slider 120633 is installed in the sliding groove 12065 and is movably connected to the sliding groove; the clamping block 12062 is connected to the slider 120633; the second spring 120632 is sleeved on the guide post 120631 and installed between the clamping block 12062 and the side panel of the sliding groove 12065 away from the center of the bottom plate.

[0020] More preferably, the connection structure 1202 includes a fixing plate 12021, a hinge post 12022, and a hinge groove 12023 for accommodating the fixing plate 12021; the hinge post 12022 is mounted on the fixing plate 12021; the fixing plate 12021 is hinged to the protective housing 1201 through the hinge post 12022; the hinge groove 12023 is disposed on the protective housing 1201; and a magnet for attracting and holding the fixing plate 12021 is provided in the hinge groove 12023.

[0021] Preferably, the detection host 4 includes an ARM processor 41, a filtering module 42, an AD conversion module 43, a synchronization module 44, an FPGA algorithm processing module 45, and a communication module 46; the filtering module 42, the AD conversion module 43, the synchronization module 44, the FPGA algorithm processing module 45, and the communication module 46 are respectively connected to the ARM processor 41; the detection host 4 communicates with the IED front-end detection unit 3 through the communication module 46.

[0022] More preferably, the communication module 46 is an optical fiber communication module, a 3G communication module, a TCP / IP communication module, a WIFI communication module, or a USB communication module.

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

[0024] I. Effectively Preventing Damage to Ultrasonic Sensors Due to Excessive Robot Movement: The detection device in this invention is installed on a substation inspection robot. The substation inspection robot moves to attach the ultrasonic sensor to the outer wall of the substation equipment for detection. Due to the protective housing, the detection device is protected. Due to the buffering effect of the first spring, the ultrasonic sensor can fit well against the outer wall of the substation equipment. At the same time, the clamping block and pressing structure also provide good buffering for the ultrasonic sensor, effectively preventing damage to the ultrasonic sensor caused by excessive robot movement.

[0025] II. Safety and Reliability: The drive structure in this invention is equipped with a limit substructure to prevent damage to the ultrasonic sensor due to drive structure failure, thereby improving the safety performance of the device.

[0026] Third, strong versatility: The detection host in this invention is equipped with a communication module that supports fiber optic communication, 3G communication, TCP / IP communication, WIFI communication or USB communication, which improves the versatility and compatibility of the device. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the detection device in this invention;

[0028] Figure 2 This is a schematic diagram of the ultrasonic sensor module in this invention;

[0029] Figure 3 This is a cross-sectional view of the ultrasonic sensor module in this invention;

[0030] Figure 4 This is a schematic diagram of the mounting plate in this invention;

[0031] Figure 5 This is a cross-sectional view of the mounting plate in this invention;

[0032] Figure 6 This is a schematic diagram of the detection host in this invention.

[0033] The numbers in the diagram are as follows:

[0034] 1. Ultrasonic sensor module; 2. Preamplifier; 3. IED front-end detection unit; 4. Detection host; 5. IED memory; 11. Ultrasonic sensor; 12. Sensor protection unit; 1201. Protective housing; 1202. Connection structure; 1203. Drive structure; 1204. Guide post; 1205. Moving plate; 1206. Mounting plate; 1207. First spring; 1208. Movable hole; 12021. Fixed plate; 12022. Hinge post; 12023. Hinge groove; 12031. Drive motor; 12032. Lead screw; 12033. Limiting substructure; 12061. Base plate; 12062. Clamping block; 12063. Pressing structure; 12064. Through hole; 12065. Sliding groove; 120631. Guide post; 120632. Second spring; 120633. Slider. Detailed Implementation

[0035] 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, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0036] A detection device for detecting partial discharge in power equipment, the structure of which is as follows: Figure 1 As shown, it includes:

[0037] The system comprises an ultrasonic sensor module 1, a preamplifier 2, an IED front-end detection unit 3, a detection host 4, and an IED memory 5. The ultrasonic sensor module 1 is connected to the IED front-end detection unit 3 via the preamplifier 2. The IED memory 5 is also connected to the IED front-end detection unit 3. The IED front-end detection unit 3 communicates with the detection host 4. The ultrasonic sensor module 1 includes an ultrasonic sensor 11 and a sensor protection unit 12. The ultrasonic sensor 11 is installed within the sensor protection unit 12, which is mounted on the substation inspection robot.

[0038] In this embodiment, the output electrical signal of the ultrasonic sensor 11 is 1μV, the operating frequency band is 20~200kHz, and the dynamic range is greater than 80dB. The preamplifier 2 is used to modulate and amplify the weak signal output by the ultrasonic sensor 11 and then transmit it to the IED front-end detection unit 3.

[0039] The IED memory 5 uses an internal 256MB NandFLASH high-speed memory to improve operating speed, and an external SD card memory that supports up to 32GB capacity.

[0040] The main parts of the device are described below:

[0041] I. Sensor Protection Unit 12

[0042] The structure of the sensor protection unit 12 is as follows: Figure 2 and Figure 3 As shown, it includes a protective housing 1201, a drive structure 1203, a guide post 1204, a moving plate 1205, a mounting plate 1206, a first spring 1207, and a connecting structure 1202;

[0043] Guide post 1204, movable plate 1205, mounting plate 1206 and first spring 1207 are respectively installed inside the protective housing 1201, and drive structure 1203 and connecting structure 1202 are installed on the protective housing 1201;

[0044] One end of the guide post 1204 is connected to the front panel of the protective housing 1201, and the other end is connected to the rear panel of the protective housing 1201.

[0045] The movable plate 1205 and the mounting plate 1206 are movably connected to the guide post 1204 respectively. The movable plate 1205 is installed on the rear panel side of the housing, and the mounting plate 1206 is installed on the front panel side of the housing.

[0046] The first spring 1207 is sleeved on the guide post 1204 and installed between the movable plate 1205 and the mounting plate 1206;

[0047] The ultrasonic sensor 11 is mounted on the mounting plate 1206;

[0048] The front panel of the protective housing 1201 is provided with an active hole 1208 for the ultrasonic sensor 11 to pass through;

[0049] The sensor protection unit 12 is connected to the inspection robot through the connection structure 1202.

[0050] The drive structure 1203 includes a drive motor 12031 and a lead screw 12032. The drive motor 12031 is fixed to the rear plate of the protective housing 1201. The moving plate 1205 has a threaded hole, and the lead screw 12032 passes through the threaded hole and is movably connected to the moving plate 1205. One end of the lead screw 12032 is connected to the drive motor 12031. The drive structure 1203 also has a limiting substructure 12033, which is installed at the other end of the lead screw 12032. In this embodiment, the limiting substructure 12033 is a retaining ring or a stop block, or it can be a limiting structure of other shapes, as long as it can limit the moving plate 1205.

[0051] The structure of the mounting plate 1206 in this embodiment is as follows: Figure 4 and Figure 5As shown, it includes a base plate 12061, a clamping block 12062, and a pressing structure 12063. The base plate 12061 is provided with a through hole 12064 for the guide post 1204 to pass through and a sliding groove 12065 for accommodating the pressing structure 12063. The clamping block 12062 is movably connected to the base plate 12061, and the pressing structure 12063 is connected to the clamping structure 12062.

[0052] The clamping structure 12063 includes a guide post 120631, a second spring 120632, and a slider 120633. The two ends of the guide post 120631 are respectively connected to the two ends of the sliding groove 12065. The bottom of the clamping block 12062 is provided with a through hole for the guide post 120631 to pass through. The clamping block 12062 is movably connected to the guide post 120631 through the through hole. The slider 120633 is installed in the sliding groove 12065 and is movably connected to the sliding groove. The clamping block 12062 is connected to the slider 120633. The second spring 120632 is sleeved on the guide post 120631 and is installed between the clamping block 12062 and the side panel of the sliding groove 12065 away from the center of the bottom plate.

[0053] The connecting structure 1202 includes a fixed plate 12021, a hinge post 12022, and a hinge slot 12023 for accommodating the fixed plate 12021. The hinge post 12022 is mounted on the fixed plate 12021, and the fixed plate 12021 is hinged to the protective housing 1201 via the hinge post 12022. The hinge slot 12023 is disposed on the protective housing 1201, and a magnet for attracting and holding the fixed plate 12021 is provided in the hinge slot 12023. The fixed plate 12021 is a laminated material plate, and the fixed plate 12021 is fixed to the robot with bolts, facilitating the assembly and disassembly of the protective housing 1201 on the robot.

[0054] With the structure in this embodiment, since the guide post 1204 passes through the movable plate 1205, the movable plate 1205 is restricted and can only move along the guide post 1204. Since the lead screw 12032 passes through the threaded hole, the drive motor 12031 can drive the lead screw 12032 to rotate, thereby driving the movable plate 1205 to move. Since the two ends of the first spring 1207 are connected to the mounting plate 1206 and the movable plate 1205, the movement of the movable plate 1205 along the guide post 1204 can drive the mounting plate 1206 to move along the guide post 1204. The ultrasonic sensor 11 mounted on the mounting plate 1206 can be stored in the mounting cavity, so that it is stored and protected when not in use.

[0055] The clamping block 12062 in this embodiment is designed to move towards the center of the mounting plate 1206, thus clamping and fixing the ultrasonic sensor 11. The sliding groove 12065, guide post 120631, slider 120633, and second spring 1207 in this embodiment allow the guide post 120631 to pass through the slider 120633, and the slider 120633 to move only along the sliding groove 12065. The second spring 1207 continuously pushes the slider 120633 towards the center of the mounting plate 1206, thereby moving the clamping block 12062 towards the center of the mounting plate 1206 to fix the ultrasonic sensor 11. This design allows for convenient mounting and dismounting of ultrasonic sensors 11 of different sizes and models on the mounting plate 1206.

[0056] With the hinge slot 12023, hinge hole and hinge post 12022 provided in this embodiment, the hinge post 12022 passes through the corresponding hinge hole to hinge the fixing plate 12021 in the hinge slot 12023, so that the fixing plate 12021 can be stored in the hinge slot 12023 when not in use, thereby reducing the space occupied by the protective shell 1201. The hinge slot 12023 is provided with a magnet, and the fixing plate 12021 is made of iron, so that the fixing plate 12021 can be fixedly stored in the hinge slot 12023 in a relatively simple way.

[0057] In this embodiment, the detection device for partial discharge detection of substation equipment is used by moving the clamping block 12062 to separate it, allowing the ultrasonic sensor 11 to be placed in and then releasing the clamping block 12062. The second spring 120632 pushes the clamping block 12062 to clamp and fix the ultrasonic sensor 11. Then, the fixing plate 12021 is rotated out of the hinge slot 12023 and fixed to the substation inspection robot with bolts. Then, the drive motor 12031 is started to make the ultrasonic sensor 11 extend out of the movable hole 1208. The robot moves to make the ultrasonic sensor 11 adhere to the outer wall of the substation equipment for detection.

[0058] II. Detection host 4

[0059] The structure of the detection host 4 in this embodiment is as follows: Figure 6 As shown, it includes an ARM processor 41, a filtering module 42, an AD conversion module 43, a synchronization module 44, an FPGA algorithm processing module 45, and a communication module 46. The filtering module 42, AD conversion module 43, synchronization module 44, FPGA algorithm processing module 45, and communication module 46 are respectively connected to the ARM processor 41. The detection host 4 communicates with the IED front-end detection unit 3 through the communication module 46.

[0060] In this embodiment, the communication module 46 is an optical fiber communication module, a 3G communication module, a TCP / IP communication module, a WIFI communication module, or a USB communication module. That is, the IED front-end detection unit 3 can communicate with the detection host 4 through optical fiber communication, 3G communication, TCP / IP communication, WIFI communication, or USB communication.

[0061] The monitoring host in this embodiment has the following functions:

[0062] (1) Real-time detection: Continuously detect the ultrasonic signal generated by the partial discharge of the device under test in real time, determine whether there is a partial discharge fault, and display the time domain waveform of the detector signal in a single power frequency cycle in real time.

[0063] (2) Spectrum display: It has the ability to detect parameters such as peak value, effective value, phase, and number of discharges of time-domain signals; it has multiple spectrum expression methods such as periodic spectrum, statistical spectrum, trend spectrum, and spectrum spectrum.

[0064] (3) Multiple analysis functions: It has the functions of setting and analyzing detection threshold, fault threshold, display shielding, range and statistics, and measurement mode.

[0065] (4) PD information storage: Save important PD information, such as the peak value of each PD pulse detection signal and the phase information of PD occurrence, count the number of PD pulse repetitions, detection amplitude, phase, average value, and time domain waveform of the detection signal in a single power frequency cycle, time domain waveform of continuous cycles, and image files of arbitrary cycles.

[0066] (5) Image Copy Comparison: Built-in typical images of common defects and anomalies, such as: corona discharge, metal particle discharge, void discharge, and suspension discharge. The analysis software also collects relevant typical images accumulated by our institute in long-term R&D and after-sales service, as well as those highly recognized by the industry at home and abroad. Through automatic similarity retrieval and comparison or manual copy comparison, it assists testers in determining the nature and extent of defects.

[0067] The detection device in this embodiment can perform ultrasonic partial discharge detection on transformers, GIS and other power equipment without power interruption. It has advantages such as IP-based operation, wireless communication, openness, ease of use, synchronization, convenient backend management, diagnostic analysis, and easy verification and maintenance. Specific features are as follows:

[0068] IP-based design: This requires functional units to be designed using IP principles, conforming to the basic communication protocol of IEC 61850 from the bottom layer. IP-based functional units enable testing devices (instruments) to have strong networking and configuration capabilities, thereby achieving open local and wide-area testing.

[0069] Wireless: The functional units adopt independent working modes of wireless communication networking (supporting wired) and battery power (supporting mains power), which can be quickly and independently deployed at different detection positions to form temporary or continuous detection (monitoring) systems.

[0070] Wireless technology can save a lot of work on wiring and cable management for short-term detection; and it can eliminate the need for wiring projects for long-term online monitoring.

[0071] Openness: It can support the coordinated operation of several to dozens of detection units with different modes, and the number of detection units and detection items can be freely increased or decreased. The host, software, detection units and sensors can all be upgraded, calibrated and maintained independently, and the entire detection system has excellent openness.

[0072] Easy to use, addressing the problems of difficult installation, maintenance, verification, and low efficiency of current online monitoring systems, the device in this embodiment does not require installation, wiring, on-site maintenance, or on-site inspection, which can greatly reduce the workload of monitoring device maintenance and improve the reliability and pertinence of the monitoring device.

[0073] Synchronization: Partial discharge projects require high-precision time base synchronization or phase synchronization. The wireless synchronization unit developed by our institute can be embedded in the relevant detection unit. The time base synchronization accuracy is better than 1μs, which fully meets the time base requirements of high-precision phase detection such as partial discharge.

[0074] Facilitates backend management: When used as a systematic online detection terminal, it supports connection to the main system at the station end.

[0075] When used as an independent detection system integrated with an inspection robot, it can achieve remote networking from any location via communication methods such as 4G. Multiple back-end management and analysis platforms can be established in different locations to enable remote analysis and consultation.

[0076] Diagnostic Analysis: The analysis software includes built-in typical defect and anomaly maps as specified in relevant technical specifications. It also collects typical maps accumulated through long-term R&D and after-sales service, as well as those highly recognized by the industry both domestically and internationally. It features map similarity comparison analysis, automatically retrieving typical defect and anomaly maps from the map library, or performing manual image-to-image comparison to determine the nature and severity of defects. Data indicators can be compared using standard or historical data retrieved from the library.

[0077] Verification and maintenance: This system can be directly verified in relevant laboratories and maintained directly by the manufacturer through spare parts replacement.

[0078] In this embodiment, the substation inspection robot moves to attach the ultrasonic sensor 11 to the outer wall of the substation equipment for detection. The protective housing 1201 in this embodiment provides protection for the ultrasonic sensor 11, the preamplifier 2, and the IED front-end detection unit 3. The guide post 1204 passes through the through hole 12064, restricting the mounting plate 1206 to move only along the guide post 1204. The first spring 1207 continuously pushes the mounting plate 1206 towards the movable hole 1208, allowing the ultrasonic sensor 11 mounted on the mounting plate 1206 to extend out of the movable hole 1208, facilitating optimal contact between the ultrasonic sensor 11 and the outer wall of the substation equipment. Simultaneously, because the first spring 1207 is retractable, the ultrasonic sensor 11 can move along the movable hole 1208 when the robot moves it to contact the substation equipment, effectively preventing damage to the ultrasonic sensor 11 due to excessive robot movement.

[0079] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A detection device for detecting partial discharge in power equipment, the device being mounted on a substation inspection robot, characterized in that, The system includes an ultrasonic sensor module (1), a preamplifier (2), an IED front-end detection unit (3), a detection host (4), and an IED memory (5). The ultrasonic sensor module (1) is connected to the IED front-end detection unit (3) via the preamplifier (2). The IED memory (5) is connected to the IED front-end detection unit (3). The IED front-end detection unit (3) communicates with the detection host (4). The ultrasonic sensor module (1) includes an ultrasonic sensor (11) and a sensor protection unit (12). The ultrasonic sensor (11) is installed in the sensor protection unit (12), and the sensor protection unit (12) is installed on the substation inspection robot. The sensor protection unit (12) includes a protective housing (1201), a connecting structure (1202), a driving structure (1203), a guide post (1204), a moving plate (1205), a mounting plate (1206), and a first spring (1207). The guide post (1204), the movable plate (1205), the mounting plate (1206), and the first spring (1207) are respectively installed inside the protective housing (1201); the connecting structure (1202) and the driving structure (1203) are installed on the protective housing (1201); One end of the guide post (1204) is connected to the front panel of the protective housing (1201), and the other end is connected to the rear panel of the protective housing (1201). The movable plate (1205) and the mounting plate (1206) are respectively movably connected to the guide column (1204). The movable plate (1205) is installed on the rear panel side of the housing, and the mounting plate (1206) is installed on the front panel side of the housing. The first spring (1207) is sleeved on the guide post (1204) and installed between the movable plate (1205) and the mounting plate (1206); The ultrasonic sensor (11) is mounted on the mounting plate (1206); The front panel of the protective housing (1201) is provided with an active hole (1208) for the ultrasonic sensor (11) to pass through. The sensor protection unit (12) is connected to the inspection robot through the connection structure (1202); The drive structure (1203) includes a drive motor (12031) and a lead screw (12032); the drive motor (12031) is fixed on the rear plate of the protective housing (1201); the movable plate (1205) is provided with a threaded hole; the lead screw (12032) passes through the threaded hole and is movably connected to the movable plate (1205); one end of the lead screw (12032) is connected to the drive motor (12031); The mounting plate (1206) includes a base plate (12061), a clamping block (12062), and a pressing structure (12063); the base plate (12061) is provided with a through hole (12064) for the guide post (1204) to pass through and a sliding groove (12065) for accommodating the pressing structure (12063); the clamping block (12062) is movably connected to the base plate (12061); the pressing structure (12063) is connected to the clamping structure (12062); The clamping structure (12063) includes a guide post (120631), a second spring (120632), and a slider (120633). The two ends of the guide post (120631) are respectively connected to the two ends of the sliding groove (12065). The bottom of the clamping block (12062) is provided with a through hole for the guide post (120631) to pass through. The clamping block (12062) is movably connected to the guide post (120631) through the through hole. The slider (120633) is installed in the sliding groove (12065) and is movably connected to the sliding groove. The clamping block (12062) is connected to the slider (120633). The second spring (120632) is sleeved on the guide post (120631) and installed between the clamping block (12062) and the side panel of the sliding groove (12065) away from the center of the bottom plate.

2. The detection device for detecting partial discharge in power equipment according to claim 1, characterized in that, The drive structure (1203) is provided with a limiting substructure (12033); the limiting substructure (12033) is installed at the other end of the lead screw (12032).

3. The detection device for detecting partial discharge in power equipment according to claim 2, characterized in that, The limiting substructure (12033) is a retaining ring or a retaining block.

4. The detection device for detecting partial discharge in power equipment according to claim 1, characterized in that, The connection structure (1202) includes a fixed plate (12021), a hinge post (12022), and a hinge groove (12023) for accommodating the fixed plate (12021); the hinge post (12022) is mounted on the fixed plate (12021); the fixed plate (12021) is hinged to the protective shell (1201) through the hinge post (12022); the hinge groove (12023) is provided on the protective shell (1201); the hinge groove (12023) is provided with a magnet for attracting the fixed plate (12021).

5. A detection device for detecting partial discharge in power equipment according to claim 1, characterized in that, The detection host (4) includes an ARM processor (41), a filtering module (42), an AD conversion module (43), a synchronization module (44), an FPGA algorithm processing module (45), and a communication module (46); the filtering module (42), AD conversion module (43), synchronization module (44), FPGA algorithm processing module (45), and communication module (46) are respectively connected to the ARM processor (41); the detection host (4) communicates with the IED front-end detection unit (3) through the communication module (46).

6. A detection device for detecting partial discharge in power equipment according to claim 5, characterized in that, The communication module (46) is an optical fiber communication module, a 3G communication module, a TCP / IP communication module, a WIFI communication module, or a USB communication module.

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