Partial discharge multi-source signal detection system
By integrating acoustic emission and vibration detection into a multi-signal partial discharge detection system, the problem of not being able to monitor vibration and acoustic emission signals simultaneously in existing technologies has been solved. This enables precise location and dynamic monitoring of partial discharge, thereby improving the operational safety and reliability of power equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- THREE GORGES JINSHAJIANG CHUANYUN HYDROPOWER DEV CO LTD
- Filing Date
- 2025-05-08
- Publication Date
- 2026-05-12
Smart Images
Figure CN224231889U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of partial discharge detection technology, and more specifically, to a partial discharge multi-source signal detection system. Background Technology
[0002] In the operation of power systems, the safety and stability of power equipment are of paramount importance. Partial discharge detection technology, as a key means of monitoring the condition of power equipment, can keenly detect minute discharge phenomena inside the equipment, and take timely maintenance measures through early warning, effectively preventing equipment failures and significantly extending the service life of the equipment.
[0003] Traditional partial discharge detection methods are mainly based on electrical approaches, among which the pulse current method is widely used due to its simple principle and convenient operation. This method determines whether a discharge event has occurred by detecting the pulse current signal generated by partial discharge. However, in practical applications, this method has obvious drawbacks. On the one hand, due to the complex internal structure of power equipment and the presence of a lot of electromagnetic interference, the positioning accuracy of the discharge source is limited, making it difficult to accurately determine the discharge location. On the other hand, in terms of dynamic monitoring of the discharge process, the pulse current method can only obtain limited discharge parameters and cannot fully present the dynamic changes of the discharge process, making it difficult to meet the needs of refined operation and maintenance of power equipment.
[0004] Acoustic emission technology, based on the principle of elastic waves generated when materials have internal defects or deformities, has achieved good application results in materials science, structural health monitoring and other fields. By receiving and analyzing elastic wave signals, it can effectively identify the damage inside materials. However, in the scenario of partial discharge detection, most existing acoustic emission sensors are single-function, that is, they can only realize vibration signal monitoring or acoustic emission signal monitoring, and cannot simultaneously acquire vibration signals and acoustic emission signals generated during partial discharge. This makes it difficult to comprehensively analyze the partial discharge phenomenon from multiple dimensions, which greatly limits the accuracy and reliability of partial discharge detection and cannot meet the actual needs of partial discharge detection in power equipment. Utility Model Content
[0005] The present invention aims to provide a multi-source signal detection system for partial discharge, so as to solve the problem that existing technologies cannot simultaneously monitor vibration and acoustic emission signals in partial discharge detection.
[0006] The embodiments of this utility model are implemented as follows:
[0007] This utility model provides a partial discharge multi-source signal detection system, which includes a detection device, an amplification device, a data acquisition device and an analysis device connected in sequence.
[0008] The aforementioned detection device comprises a housing assembly, a detection assembly, a communication assembly, a display assembly, and a fixing assembly. The detection assembly is disposed within the housing assembly and connected to the communication assembly. The communication assembly is disposed on the outer side wall of the housing assembly. The display assembly is disposed on the top surface of the housing assembly. The fixing assembly is disposed at the bottom of the housing assembly.
[0009] In use, the fixing component at the bottom of the aforementioned housing assembly attaches the aforementioned detection device to the electrical equipment. The aforementioned detection component collects data from the electrical equipment through the aforementioned housing assembly, the aforementioned detection component, the aforementioned communication component, the aforementioned display component, and the aforementioned fixing component. The data is amplified and filtered for noise reduction through the built-in amplifier of the aforementioned amplification device or the aforementioned noise reduction cable, the aforementioned external amplifier, and the aforementioned coaxial cable. The signal is then transmitted to the aforementioned acquisition device and stored. After receiving the signal, the aforementioned analysis device analyzes it. Once the analysis is completed, the operator can determine the type of partial discharge, thereby facilitating accurate positioning and preventing the occurrence of faults.
[0010] The partial discharge multi-source signal detection system disclosed in this embodiment acquires sound and vibration signals through a detection device, amplifies and filters the signals through the aforementioned amplification device, transmits the signals to the aforementioned acquisition device for storage, and the aforementioned analysis device receives and analyzes the signals, thereby obtaining the type of partial discharge and locating it. Thus, the partial discharge multi-source signal detection system has the beneficial effect of simultaneously monitoring vibration and acoustic emission signals in partial discharge detection.
[0011] Optionally, the above-mentioned detection component is an acoustic emission vibration module, which is electrically connected to the above-mentioned communication component.
[0012] With this configuration, the acoustic emission vibration module combines the characteristics of both acoustic emission sensors and accelerometers. Damping material is introduced as a mass block into the structure of the piezoelectric accelerometer. In the frequency range of vibrations caused by partial discharge (10Hz~20kHz), the damping material functions as a load weight and acts as an accelerometer. In the high frequency range of acoustic emission (50kHz~200kHz), the damping material operates as a broadband acoustic emission sensor. This realizes a composite sensor that outputs both vibration and acoustic emission signals simultaneously. It can monitor in real time the internal deformation or damage of equipment caused by partial discharge, and is suitable for multi-parameter testing applications such as partial discharge status monitoring.
[0013] Optionally, the above-mentioned acquisition device has an acoustic emission acquisition module and a storage module connected together, and the acoustic emission acquisition module is electrically connected to the above-mentioned amplification device.
[0014] With this setup, the acoustic emission acquisition module collects and performs preliminary processing of the acoustic emission signal, which is then transmitted to the amplification device for amplification, facilitating the detection system to monitor both vibration and acoustic emission signals simultaneously.
[0015] Optionally: The above-mentioned analysis device includes an oscilloscope and an analysis host.
[0016] With this setup, the oscilloscope and analysis host are used to measure parameters such as voltage, current, and frequency of different signals. By displaying the signal as a continuous curve on the screen, changes in electrical signals in the circuit can be monitored intuitively. The oscilloscope helps engineers analyze the waveform characteristics of signals, such as rise time, fall time, and pulse width. In addition, it can help engineers find problems and faults in the circuit, such as signal interference and circuit misalignment. The oscilloscope can store the waveform and parameters of electrical signals for subsequent analysis and comparison, and can replay the waveform to display and detect changes in circuit performance. In short, the oscilloscope is used for circuit debugging, fault diagnosis, and analysis of circuit performance.
[0017] Optionally: the above-mentioned housing assembly is a hollow cylindrical structure, and the bottom opening of the above-mentioned housing assembly is provided with a receiving cavity, which is connected to the above-mentioned fixing assembly;
[0018] The outer surface of the aforementioned housing assembly is provided with a connection hole for connecting to the aforementioned communication component.
[0019] With this configuration, the aforementioned cavity facilitates the placement of the aforementioned detection component and the aforementioned communication component inside the cavity, resulting in a simple detection system structure that is easy to carry and use. Furthermore, the connection hole located on the outer side of the aforementioned housing component facilitates the transmission of the acquired data from the connection hole.
[0020] Optionally, the above communication component has a grounding wire and a signal line for transmitting sound and vibration signals.
[0021] With this setup, the acoustic emission vibration module contains the same sensitive element, and both signals are output from a coaxial terminal via a signal line and a ground line. The aforementioned detection component transmits sound and vibration signals through the signal line.
[0022] Optionally, the display component has a display screen disposed on the top surface of the housing component.
[0023] With this configuration, the aforementioned display screen can more comprehensively display partial discharge events, enabling precise location of the partial discharge source and dynamic monitoring of the discharge process.
[0024] Optionally, the above-mentioned fixing component is an insulating base, and a suction cup is provided at the bottom of the insulating base.
[0025] With this setup, the suction cup is used to attach and fix the device to the partial discharge field detection equipment, such as a basin insulator, so that the detection system can simultaneously monitor vibration and acoustic emission signals.
[0026] Optionally, the amplification device is located outside the detection device and includes a noise reduction cable, an external amplifier, and a coaxial cable connected in sequence. The noise reduction cable is electrically connected to the communication component, and the coaxial cable is electrically connected to the acquisition device.
[0027] With this configuration, the external amplifier can achieve higher sensitivity and lower noise in signal capture, resulting in higher accuracy in partial discharge power source analysis and facilitating the simultaneous monitoring of vibration and acoustic emission signals by the detection system.
[0028] Optionally, the amplification device is a built-in amplifier, which is disposed inside the housing assembly and electrically connected to the communication assembly.
[0029] With this configuration, the built-in amplifier makes the detection component structure simpler and more portable, making it easier to carry and use.
[0030] In summary, the partial discharge multi-source signal detection system disclosed in this utility model integrates acoustic emission and vibration detection functions. Acoustic emission and vibration are acquired through the same component, and both signals are output from a single coaxial terminal. This allows for more comprehensive monitoring of partial discharge events, providing richer signal information, enabling precise location of partial discharge sources and dynamic monitoring of the discharge process. It also more effectively prevents and diagnoses power equipment faults, improving equipment operational safety and reliability. Furthermore, its compact design and fast response speed make it suitable for online monitoring and condition assessment of various power equipment, demonstrating broad application prospects and practical value. Attached Figure Description
[0031] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0032] Figure 1 This is a schematic diagram of the connection structure of a partial discharge multi-source signal detection system according to an embodiment of the present invention;
[0033] Figure 2 This is a schematic diagram of the detection device in an embodiment of the present invention;
[0034] Figure 3This is a cross-sectional view of Embodiment 1 of the detection device in this utility model;
[0035] Figure 4 This is a cross-sectional view of Embodiment 2 of the detection device in this utility model.
[0036] Icons: 1-Detection device, 2-Amplification device, 3-Acquisition device, 4-Analysis device, 5-Housing assembly, 6-Detection assembly, 7-Communication assembly, 8-Display assembly, 9-Fixing assembly, 10-Acoustic emission acquisition module, 11-Storage module, 12-Oscilloscope, 13-Analysis host, 14-Receiving cavity, 15-Connection hole, 16-Display screen, 17-Insulating base, 18-Noise reduction cable, 19-External amplifier, 20-Coaxial cable, 21-Built-in amplifier. Detailed Implementation
[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0039] Example 1
[0040] See Figure 1 , Figure 2 , Figure 3 and Figure 4 This embodiment proposes a partial discharge multi-source signal detection system, including a detection device 1, an amplification device 2, an acquisition device 3, and an analysis device 4 connected in sequence;
[0041] The detection device 1 has a housing assembly 5, a detection assembly 6, a communication assembly 7, a display assembly 8, and a fixing assembly 9. The detection assembly 6 is disposed inside the housing assembly 5 and connected to the communication assembly 7. The communication assembly 7 is disposed on the outer side wall of the housing assembly 5. The display assembly 8 is disposed on the top surface of the housing assembly 5. The fixing assembly 9 is disposed on the bottom of the housing assembly 5.
[0042] In use, the fixing component 9 at the bottom of the housing component 5 adsorbs the detection device 1 onto the electrical equipment. The detection component 6 detects and collects data from the electrical equipment through the housing component 5, the detection component 6, the communication component 7, the display component 8, and the fixing component 9. The data is amplified and filtered by the built-in amplifier 21 of the amplification device 2 or by the noise reduction cable 18, the external amplifier 19, and the coaxial cable 20. The signal is then transmitted to the acquisition device 3 and stored. The analysis device 4 receives the signal and analyzes it. After the analysis is completed, the staff can know the type of partial discharge, which facilitates accurate positioning and avoids the occurrence of faults.
[0043] The partial discharge multi-source signal detection system disclosed in this embodiment acquires sound and vibration signals through detection device 1, amplifies and filters the signals through amplification device 2, transmits the signals to acquisition device 3 for storage, and analyzes the signals through analysis device 4. This enables the partial discharge type to be obtained and located, thus giving the partial discharge multi-source signal detection system the beneficial effect of simultaneously monitoring vibration and acoustic emission signals in partial discharge detection.
[0044] See Figure 1 , Figure 2 , Figure 3 and Figure 4 The detection component 6 is an acoustic emission vibration module (not shown in the figure). The acoustic emission vibration module is electrically connected to the communication component 7. The acoustic emission vibration module combines the characteristics of acoustic emission sensors and accelerometers. The damping material is introduced as a mass block into the structure of the piezoelectric accelerometer. In the frequency range of vibration caused by partial discharge (10Hz~20kHz), the damping material acts as a load weight to perform the function of an accelerometer. In the high frequency range of acoustic emission (50kHz~200kHz), the damping material operates as a broadband acoustic emission sensor. This realizes a composite sensor that outputs vibration and acoustic emission signals simultaneously. It can monitor the internal deformation or damage of equipment caused by partial discharge in real time and is suitable for multi-parameter testing occasions such as partial discharge status monitoring.
[0045] The acquisition device 3 has an acoustic emission acquisition module 10 and a storage module 11 connected together. The acoustic emission acquisition module 10 is electrically connected to the amplification device 2. The acoustic emission acquisition module 10 acquires and performs preliminary processing on the acoustic emission signal, and transmits it to the amplification device 2 for amplification, so that the detection system can monitor the vibration and acoustic emission signals simultaneously.
[0046] The analysis device 4 includes an oscilloscope 12 and an analysis host 13. The oscilloscope 12 and the analysis host 13 are used to measure parameters such as voltage, current, and frequency of different signals. By displaying the signal as a continuous curve on the fluorescent screen, the changes in electrical signals in the circuit can be monitored intuitively. The oscilloscope 12 can help engineers analyze the waveform characteristics of the signal, such as rise time, fall time, and pulse width. In addition, it can help engineers find problems and faults in the circuit, such as signal interference and circuit misalignment. The oscilloscope 12 can store the waveform and parameters of the electrical signal for subsequent analysis and comparison, and can play back the waveform to display and detect changes in the circuit effect. In short, the oscilloscope 12 is used for circuit debugging, fault diagnosis, and analysis of circuit performance.
[0047] See Figure 1 , Figure 2 , Figure 3 and Figure 4 The outer shell assembly 5 is a hollow cylindrical structure. The bottom opening of the outer shell assembly 5 is provided with a receiving cavity 14, which is connected to the fixing assembly 9. The outer side of the outer shell assembly 5 is provided with a connection hole 15 for connecting to the communication assembly 7. The setting of the receiving cavity 14 makes it easy to arrange the detection assembly 6 and the communication assembly 7 inside the receiving cavity 14, which makes the detection system simple in structure, easy to carry and use. The connection hole 15 is located on the outer side of the outer shell assembly 5, which is conducive to the transmission of the collected data from the connection hole 15.
[0048] The communication component 7 has a ground wire (not shown in the figure) and a signal line (not shown in the figure) for transmitting sound and vibration signals. The acoustic emission vibration module has the same sensitive element inside. Both signals are output from a coaxial terminal with a signal line and a ground wire. The detection component 6 transmits sound and vibration signals through the signal line.
[0049] The display component 8 has a display screen 16, which is disposed on the top surface of the housing component 5. The display screen 16 can display partial discharge events more comprehensively, enabling precise positioning of the partial discharge source and dynamic monitoring of the discharge process.
[0050] See Figure 1 , Figure 2 , Figure 3 and Figure 4 The fixing component 9 is an insulating base 17. The bottom of the insulating base 17 is equipped with a suction cup (not shown in the figure). The suction cup is used to adsorb and fix it on the partial discharge field detection equipment, such as a basin insulator, so that the detection system can simultaneously monitor vibration and acoustic emission signals.
[0051] The amplification device 2 is located outside the detection device 1 and includes a noise reduction cable 18, an external amplifier 19 and a coaxial cable 20 connected in sequence. The noise reduction cable 18 is electrically connected to the communication component 7 and the coaxial cable 20 is electrically connected to the acquisition device 3. The external amplifier 19 enables higher sensitivity and lower noise in signal capture, resulting in higher accuracy in partial discharge power source analysis and facilitating the detection system to simultaneously monitor vibration and acoustic emission signals.
[0052] See Figure 1 , Figure 2 , Figure 3 and Figure 4 In this embodiment, by integrating acoustic emission and vibration detection functions, acoustic emission and vibration are acquired through the same component, and both signals are output from a coaxial terminal. This enables more comprehensive monitoring of partial discharge events, provides richer signal information, achieves precise location of partial discharge sources and dynamic monitoring of the discharge process, more effectively prevents and diagnoses power equipment faults, and improves the operational safety and reliability of the equipment. The design is compact and has a fast response speed, making it suitable for online monitoring and condition assessment of various power equipment, and has broad application prospects and practical application value.
[0053] Example 2
[0054] See Figure 1 , Figure 2 , Figure 3 and Figure 4 This embodiment provides a partial discharge multi-source signal detection system. The only difference from the first embodiment is that the amplification device 2 is a built-in amplifier 21. The built-in amplifier 21 is located inside the housing component 5 and is electrically connected to the communication component 7. The built-in amplifier 21 makes the structure of the detection component 6 simpler and more portable, and easier to carry and use.
[0055] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A partial discharge multi-source signal detection system, characterized in that: It includes a detection device (1), an amplification device (2), a data acquisition device (3), and an analysis device (4) connected in sequence; The detection device (1) has a housing assembly (5), a detection assembly (6), a communication assembly (7), a display assembly (8), and a fixing assembly (9). The detection assembly (6) is disposed inside the housing assembly (5) and connected to the communication assembly (7). The communication assembly (7) is disposed on the outer side wall of the housing assembly (5). The display assembly (8) is disposed on the top surface of the housing assembly (5). The fixing assembly (9) is disposed at the bottom of the housing assembly (5).
2. The partial discharge multi-source signal detection system according to claim 1, characterized in that: The detection component (6) is an acoustic emission vibration module, which is electrically connected to the communication component (7).
3. The partial discharge multi-source signal detection system according to claim 1, characterized in that: The acquisition device (3) has an acoustic emission acquisition module (10) and a storage module (11) connected together, and the acoustic emission acquisition module (10) is electrically connected to the amplification device (2).
4. The partial discharge multi-source signal detection system according to claim 1, characterized in that: The analysis device (4) has an oscilloscope (12) and an analysis host (13).
5. The partial discharge multi-source signal detection system according to claim 1, characterized in that: The outer shell assembly (5) is a hollow cylindrical structure. The bottom opening of the outer shell assembly (5) is provided with a receiving cavity (14), which is connected to the fixing assembly (9). The outer surface of the housing assembly (5) is provided with a connection hole (15) for connecting to the communication assembly (7).
6. The partial discharge multi-source signal detection system according to claim 1, characterized in that: The communication component (7) has a ground wire and a signal line for transmitting sound and vibration signals.
7. The partial discharge multi-source signal detection system according to claim 1, characterized in that: The display component (8) has a display screen (16) disposed on the top surface of the housing component (5).
8. The partial discharge multi-source signal detection system according to claim 1, characterized in that: The fixing component (9) is an insulating base (17), and a suction cup is provided at the bottom of the insulating base (17).
9. A partial discharge multi-source signal detection system according to any one of claims 1-8, characterized in that: The amplification device (2) is located outside the detection device (1) and includes a noise reduction cable (18), an external amplifier (19) and a coaxial cable (20) connected in sequence. The noise reduction cable (18) is electrically connected to the communication component (7) and the coaxial cable (20) is electrically connected to the acquisition device (3).
10. A partial discharge multi-source signal detection system according to any one of claims 1-8, characterized in that: The amplification device (2) is a built-in amplifier (21), which is located inside the housing assembly (5) and electrically connected to the communication assembly (7).