Ultra-high-voltage GIS equipment partial discharge monitoring device based on ultra-high-frequency sensor
By using a partial discharge monitoring device based on ultra-high frequency sensors, the problems of insufficient anti-interference capability and inaccurate fault diagnosis in existing technologies have been solved, realizing high-precision real-time monitoring and accurate fault diagnosis of GIS equipment.
Patent Information
- Application Number
- CN202422648028.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-10-31
AI Technical Summary
Existing GIS partial discharge online monitoring devices are difficult to effectively resist interference in complex environments, and are difficult to accurately locate and diagnose partial discharge fault types, thus failing to meet diverse needs.
A partial discharge monitoring device based on an ultra-high frequency sensor is adopted, including a UHF sensor, a signal filter, a signal processing module, a signal receiving module, and a fault diagnosis module. It has strong anti-interference capabilities and can realize real-time monitoring and accurate fault diagnosis.
It has higher monitoring accuracy and anti-interference capability in complex environments, and can realize real-time monitoring and accurate judgment of partial discharge fault type, thus improving the flexibility and convenience of the monitoring system.
Smart Images
Figure CN223770316U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of discharge monitoring technology, and in particular to a partial discharge monitoring device for ultra-high voltage GIS equipment based on an ultra-high frequency sensor. Background Technology
[0002] Gas-insulated switchgear (GIS) is a type of high-voltage electrical equipment that encloses various high-voltage electrical components, such as circuit breakers, disconnectors, grounding switches, instrument transformers, surge arresters, and busbars, within a grounded metal casing. The casing is filled with an insulating gas (such as sulfur hexafluoride SF6) at a certain pressure as the insulation and arc-extinguishing medium. While GIS offers high safety and reliability, some insulation defects are unavoidable due to factors such as manufacturing, transportation, and on-site assembly. These defects may affect its long-term operational reliability.
[0003] Typically, these defects are small and inconspicuous, insufficient to cause immediate breakdown during power frequency withstand voltage testing. However, after the equipment is put into operation, the normal operating voltage may trigger partial discharge, causing the defects to gradually expand and eventually lead to insulation breakdown or surface flashover, thus threatening the safe operation of the equipment. GIS maintenance is highly complex and time-consuming, and power outages can sometimes affect non-faulty components. Furthermore, GIS maintenance requires extremely high standards; even slight negligence can affect the quality of maintenance. Currently, online partial discharge monitoring technology for gas-insulated switchgear is being gradually promoted and applied. However, existing GIS online partial discharge monitoring devices are relatively simple in form, making it difficult to effectively cope with noise interference in complex environments, accurately locate partial discharge fault areas, and determine the type of partial discharge fault, thus failing to meet the diverse needs of different users. Utility Model Content
[0004] The purpose of this invention is to provide a partial discharge monitoring device for ultra-high voltage GIS equipment based on an ultra-high frequency sensor. This device can process the acquired ultra-high frequency electrical signals, exhibits stronger anti-interference capabilities in field environments, has higher monitoring accuracy, and can achieve real-time monitoring. Furthermore, it can determine the type of abnormal discharge from the detected ultra-high frequency electrical signals, leading to more accurate diagnosis of partial discharge faults in GIS equipment. The specific technical solution is as follows:
[0005] A partial discharge monitoring device for ultra-high voltage GIS equipment based on an ultra-high frequency sensor includes a UHF sensor, a signal filter, a signal processing module, a signal receiving module, and a fault diagnosis module. The UHF sensor is installed on the casing of the GIS. One end of the signal filter is connected to the UHF sensor, and the other end is connected to the signal processing module. The signal receiving module is connected to both the signal processing module and the fault diagnosis module.
[0006] Preferably, the signal processing module includes a signal amplifier, a signal acquisition unit, and a signal digital-to-analog conversion module; the signal amplifier is connected to the UHF sensor and the signal acquisition unit respectively; the signal digital-to-analog conversion module is connected to the signal acquisition unit and the signal receiving module respectively.
[0007] Preferably, the fault judgment module includes a fault diagnosis module and a fault display module; the fault diagnosis module and the fault display module are respectively connected to the signal receiving module.
[0008] Preferably, it also includes a wireless communication module, a cloud client, and a cloud service platform; the wireless communication module is connected to the signal receiving module, the cloud client, and the cloud service platform, respectively.
[0009] Preferably, it also includes a fault alarm module; the fault alarm module is connected to the signal receiving module.
[0010] Preferably, the wireless communication module is a LoRa communication module.
[0011] Preferably, the signal receiving module and the fault diagnosis module are microcontrollers.
[0012] Preferably, the cloud client includes both PC and mobile clients.
[0013] Compared with existing technologies, this utility model has the following beneficial effects:
[0014] This invention detects discharge signals from GIS equipment by setting up a UHF sensor, and processes the collected UHF electrical signals by setting up a signal filter and a signal processing module. It has stronger anti-interference ability and higher monitoring accuracy in the field environment and can realize real-time monitoring. Furthermore, by setting up a fault judgment module, it can determine the abnormal discharge type of the detected UHF electrical signals, making the diagnosis of partial discharge fault types in GIS more accurate. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0016] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0019] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first," "second," and "third" are used in the description, they are for descriptive purposes and to distinguish technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.
[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.
[0021] Example 1
[0022] As shown in the figure, a partial discharge monitoring device for ultra-high voltage GIS equipment based on an ultra-high frequency sensor includes a UHF sensor, a signal filter, a signal processing module, a signal receiving module, and a fault diagnosis module. The UHF sensor is installed on the casing of the GIS. One end of the signal filter is connected to the UHF sensor, and the other end is connected to the signal processing module. The signal receiving module is connected to both the signal processing module and the fault diagnosis module.
[0023] Next, the working principle of this embodiment will be described in detail so that those skilled in the art can better understand this utility model:
[0024] The UHF sensors are mounted on the GIS housing, and multiple UHF sensors are configured to detect ultra-high frequency electrical signals generated by partial discharge. These signals are then transmitted to a signal filter. The signal filter filters the UHF signals to remove interference, and then transmits the processed UHF signals to a signal processing module. The signal processing module converts the UHF signals from digital to analog signals into signals that can be processed by a computer. These signals are then received by a signal receiving module and transmitted to a fault diagnosis module to determine the type of discharge fault.
[0025] Example 2
[0026] The difference between this embodiment and Embodiment 1 is that the signal processing module includes a signal amplifier, a signal acquisition unit, and a signal digital-to-analog conversion module; the signal amplifier is connected to the UHF sensor and the signal acquisition unit respectively; and the signal digital-to-analog conversion module is connected to the signal acquisition unit and the signal receiving module respectively.
[0027] The signal detected by the UHF sensor is first amplified by a signal amplifier. The amplified signal is then acquired by the signal acquisition unit and converted from analog to digital by a signal-to-analog converter. The digital signal is transmitted to the signal receiving module, which then transmits it to the fault diagnosis module for determining the type of discharge. By adding a signal amplifier, weak partial discharge signals can be enhanced, improving detection sensitivity. The signal acquisition unit and the signal-to-analog converter ensure accurate signal acquisition and digital processing, providing more reliable data for subsequent fault diagnosis.
[0028] The working principle of this embodiment is the same as that of Embodiment 1.
[0029] Example 3
[0030] The difference between this embodiment and Embodiment 2 is that the fault judgment module includes a fault diagnosis module and a fault display module; the fault diagnosis module and the fault display module are respectively connected to the signal receiving module. The fault diagnosis module is used to judge the detected UHF electrical signal and obtain the discharge fault type of the GIS equipment. The fault display module is a display screen used to display the fault type judged by the fault diagnosis module on site.
[0031] The working principle of this embodiment is the same as that of Embodiment 1.
[0032] Example 4
[0033] This embodiment differs from Embodiment 3 in that it further includes a wireless communication module, a cloud client, and a cloud service platform. The wireless communication module is connected to the signal receiving module, the cloud client, and the cloud service platform, respectively. The signals received by the signal receiving module are transmitted to the cloud client and the cloud service platform via the wireless communication module. The cloud client is a host computer, and the cloud service platform is a server, capable of storing, analyzing, and processing signals. This facilitates remote monitoring by staff to understand the equipment's operating status anytime, anywhere, improving the convenience and efficiency of monitoring.
[0034] The working principle of this embodiment is the same as that of Embodiment 1.
[0035] Example 5
[0036] The difference between this embodiment and embodiment 4 is that it also includes a fault alarm module; the fault alarm module is connected to the signal receiving module. The fault alarm module is an audible and visual alarm. When the signal receiving module receives information about an abnormal ultra-high frequency electrical signal from the fault diagnosis module, it transmits alarm information to the fault alarm module, and the fault alarm module issues an alarm.
[0037] The working principle of this embodiment is the same as that of Embodiment 1.
[0038] Example 6
[0039] The difference between this embodiment and Embodiment 5 is that the wireless communication module is a LoRa communication module. This LoRa communication module transmits data to the cloud client and cloud service platform via LoRa communication technology, offering advantages such as low power consumption and long-distance transmission, thus improving the stability and reliability of the monitoring system.
[0040] The working principle of this embodiment is the same as that of Embodiment 1.
[0041] Example 7
[0042] The difference between this embodiment and Embodiment 6 is that the signal receiving module and fault diagnosis module are microcontrollers. The signal receiving module and fault diagnosis module use microcontrollers to receive and process ultra-high frequency electrical signals from the signal processing module and transmit information to other modules. Microcontrollers have the advantages of small size, low cost, and stable performance, enabling fast and accurate signal processing and fault diagnosis, thus improving the cost-effectiveness of the monitoring system.
[0043] The working principle of this embodiment is the same as that of Embodiment 1.
[0044] Example 8
[0045] The difference between this embodiment and Embodiment 7 is that the cloud client includes both a PC and a mobile terminal. The signal receiving module is wirelessly connected to the cloud client, allowing staff to view equipment operating status and fault information at any time via both the PC and mobile terminals. The inclusion of both PC and mobile terminals in the cloud client facilitates monitoring and management in different scenarios, improving the flexibility and convenience of the monitoring system.
[0046] The working principle of this embodiment is the same as that of Embodiment 1.
[0047] In summary, this invention detects discharge signals from GIS equipment by setting up a UHF sensor, and processes the collected UHF electrical signals by setting up a signal filter and a signal processing module. It has stronger anti-interference capabilities and higher monitoring accuracy in the field environment and can realize real-time monitoring. Furthermore, by setting up a fault judgment module, it can determine the abnormal discharge type of the detected UHF electrical signals, making the diagnosis of partial discharge fault types in GIS more accurate.
[0048] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.
Claims
1. A partial discharge monitoring device for an ultra-high voltage GIS device based on a UHF sensor, characterized in that, The UHF sensor is installed on the shell of the GIS; one end of the signal filter is connected with the UHF sensor, and the other end is connected with the signal processing module; the signal receiving module is connected with the signal processing module and the fault judgment module respectively.
2. The device according to claim 1, characterized in that, The signal processing module comprises a signal amplifier, a signal acquisition unit and a signal digital-analog conversion module; the signal amplifier is connected with the UHF sensor and the signal acquisition unit respectively; the signal digital-analog conversion module is connected with the signal acquisition unit and the signal receiving module respectively. 3.The UHV GIS partial discharge monitoring device based on a TEF sensor of claim 1, characterized in that, The fault judgment module comprises a fault diagnosis module and a fault display module; the fault diagnosis module and the fault display module are connected with the signal receiving module respectively.
4. The device according to claim 1, characterized in that, The wireless communication module, the cloud client and the cloud service platform are further included; the wireless communication module is connected with the signal receiving module, the cloud client and the cloud service platform respectively.
5. The device according to claim 3, characterized in that, The fault alarm module is further included; the fault alarm module is connected with the signal receiving module.
6. The device according to claim 4, characterized in that, The wireless communication module is a LoRa communication module.
7. The device according to claim 1, characterized in that, The signal receiving module and the fault diagnosis module are single-chip microcomputers.
8. The device according to claim 4, characterized in that, The cloud client comprises a PC end and a mobile end.