Ultrahigh frequency partial discharge detection device based on oscilloscope

Abstract

An oscilloscope-based ultrahigh-frequency partial discharge detection device integrates an oscilloscope into an ultrahigh-frequency partial discharge detection system, and the oscilloscope has high time resolution, can display signal waveforms in real time, and accurately captures time characteristics of partial discharge events, including rising edges, duration and amplitude of discharge pulses. The system not only can capture electromagnetic wave signals in the UHF frequency band, but also can record, analyze and store pulse current signals, provides more comprehensive diagnosis information, is high in anti-interference capability, facilitates rapid identification and analysis of partial discharge phenomena by field engineers, and also facilitates in-depth analysis, recording and storage after the event. Multi-channel measurement is provided, a plurality of UHF sensors can be accessed at the same time, and the detection coverage range is increased; the operation is simple, the carrying and field use are convenient, and the portability of the detection system is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of partial discharge detection equipment, and relates to a UHF partial discharge detection device based on an oscilloscope. Background Art

[0002] Partial discharge (PD) is an important indicator of the insulation deterioration of power equipment, and its detection is crucial for preventing equipment failures and extending the service life of equipment. At present, there are many detection methods for partial discharge, including pulse current method, ultrasonic method, optical measurement method, radio frequency detection method, chemical method, etc. Among them, the ultra-high frequency (UHF) detection method has received attention because it can detect partial discharges inside equipment such as GIS (Gas Insulated Switchgear).

[0003] Although the UHF detection method has certain advantages in partial discharge detection, there are also some disadvantages and limitations: frequency band limitation: the UHF method mainly detects electromagnetic wave signals from several hundred megahertz to several gigahertz, and may not be able to effectively detect discharge signals outside this frequency band; environmental interference: UHF sensors are easily interfered by the on-site electromagnetic environment, such as radio, mobile communication, etc., which may lead to false alarms or missed alarms. Therefore, an oscilloscope at UHF cannot coexist with a high-speed sampling component; complex data analysis: the UHF method generates a large amount of data, and complex signal processing and data analysis techniques are required to extract discharge signals. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a UHF partial discharge detection device based on an oscilloscope, which is used to solve the problems of low detection accuracy and inaccurate signal pattern recognition in UHF partial discharge detection.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is: a UHF partial discharge detection device based on an oscilloscope, which includes an equipment box and a detection device arranged in the equipment box. The equipment box is provided with a lifting structure and can slide; the detection device includes a partial discharge detection component, a power supply component, a synchronization component, a sensor connection component, a network component and a signal transmission component. The power supply component, the synchronization component, the sensor connection component, the network component and the signal transmission component are arranged from top to bottom and are adjacent to the partial discharge component; the partial discharge detection component includes: an oscilloscope and a keyboard, and the oscilloscope and the keyboard are arranged up and down in the equipment box.

[0006] The equipment box includes an upper cover and a box body. The upper cover is integrally rotatably connected to one side of the box body, and a buckle structure is arranged on the other side of the upper cover for fixedly connecting to the box body; the partial discharge detection component is arranged on the inner surface of the box body.

[0007] The power supply component includes a power supply interface and a power switch, which are adjacently arranged on the inner surface of the box body and on the same side as the partial discharge detection component.

[0008] The synchronization component includes a positive synchronization module and a negative synchronization module, which are adjacently arranged on the inner surface of the box body and are arranged below the power supply component.

[0009] The sensor connection component includes a coaxial connection module and an optical fiber connection module, which are adjacently arranged on the inner surface of the box body and are arranged below the synchronization component.

[0010] The network component includes a 5G module and a WIFi module, which are adjacently arranged on the inner surface of the box body and are arranged below the sensor connection component.

[0011] The signal transmission component includes a USB module and a network interface module, which are adjacently arranged on the inner surface of the box body and are arranged below the network component.

[0012] The lifting structure includes a handle, which is arranged on one side of the box body and on the same side as the buckle structure.

[0013] The lifting structure further includes a lifting rod and a sliding cavity. The sliding cavity is arranged inside the outer side surface of the box body and adjacent to the side surface of the handle. The lifting rod is slidably arranged in the sliding cavity; a pulley is also arranged on the box body, and the pulley and the lifting rod are respectively arranged at both ends of the same side surface of the box body.

[0014] A handle is arranged on the lifting rod.

[0015] The main beneficial effects of the present utility model are as follows:

[0016] Integrating an oscilloscope into the ultra-high frequency partial discharge detection system, the oscilloscope has high time resolution, can display the signal waveform in real time, accurately capture the time characteristics of partial discharge events, including the rising edge, duration and amplitude of discharge pulses, enabling the system to not only capture electromagnetic wave signals in the UHF band, but also record, analyze and save pulse current signals, providing more comprehensive diagnostic information, with strong anti-interference ability, facilitating on-site engineers to quickly identify and analyze partial discharge phenomena and also facilitating in-depth analysis and record preservation afterwards.

[0017] Providing multi-channel measurement, multiple UHF sensors can be simultaneously connected, increasing the detection coverage; simple operation, convenient for carrying and on-site use, improving the portability of the detection system. Description of the Drawings

[0018] The following further illustrates the present utility model in conjunction with the drawings and embodiments:

[0019] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0020] Figure 2 is a structural schematic diagram of the handle of the present utility model;

[0021] Figure 3 is a structural schematic diagram of the detection device of the present utility model;

[0022] Figure 4 is the front view of the internal structure of the present utility model;

[0023] In the figure: 1 - equipment box; 2 - detection device; 3 - lifting structure; 4 - partial discharge detection component; 5 - power supply component; 6 - synchronization component; 7 - sensor connection component; 8 - network component; 9 - signal transmission component; 10 - oscilloscope; 11 - keyboard; 12 - upper cover; 13 - box body; 14 - buckle structure; 15 - power interface; 16 - power switch; 17 - positive synchronization module; 18 - negative synchronization module; 19 - coaxial connection module; 20 - fiber optic connection module; 21 - 5G module; 22 - WIFI module; 23 - USB module; 24 - network port module; 25 - handle; 26 - lifting rod; 27 - sliding cavity; 28 - pulley; 29 - handle. Detailed implementation manners

[0024] As Figures 1 to 4 in, a UHF partial discharge detection device based on an oscilloscope,

[0025] Embodiment 1,

[0026] The equipment box 1 and the detection device 2 arranged in the equipment box 1, the equipment box 1 is provided with a lifting structure 3 and slides for movement, the equipment box 1 is used for installing and storing the detection device 2, the lifting structure 3 facilitates carrying and moving, and the detection device 2 is used for measuring the on-site partial discharge signal.

[0027] The detection device 2 includes: a partial discharge detection component 4, which transmits the partial discharge signal collected by the UHF sensor to the oscilloscope 10 for observing and analyzing the weak pulse signal generated by the partial discharge; a power supply component 5, which is used for supplying power to other modules; a synchronization component 6, which is connected to the transformer to achieve synchronization during the signal collection process of the UHF sensor; a sensor connection component 7, which is used for connecting the UHF sensor and performing amplification and filtering processing on the collected partial discharge signal; a network component 8, which has built-in 5G and WIFI communication methods; a signal transmission component 9, which is used for connecting to a backend signal processing platform such as an industrial computer; the power supply component 5, the synchronization component 6, the sensor connection component 7, the network component 8 and the signal transmission component 9 are arranged from top to bottom and adjacent to the left and right of the partial discharge component.

[0028] The partial discharge detection component 4 includes: an oscilloscope 10 and a keyboard 11. The oscilloscope 10 and the keyboard 11 are arranged vertically in the equipment box 1. The screen of the oscilloscope 10 is placed on the surface of the box body 13, and the main body is arranged in the box body 13. The oscilloscope 10 identifies the phase at which the discharge occurs, measures the pulse waveform and the number of discharges, observes the characteristics of the partial discharge, and infers the characteristics and possible causes of the discharge.

[0029] The partial discharge detection component 4 also includes an industrial control computer, which is connected through USB or network port. The industrial control computer configures the oscilloscope 10 to set appropriate parameters such as sampling rate, bandwidth, time, and voltage range, so as to capture the weak signals generated by the partial discharge, and can display the PRPD and PRPS maps of the partial discharge in real time, used to identify the partial discharge signal category, thereby locating the position of the partial discharge source.

[0030] Embodiment 2

[0031] The equipment box 1 includes: an upper cover 12 and a box body 13. The upper cover 12 is integrally and rotatably connected to one side of the box body 13. A buckle structure 14 is arranged on the other side of the upper cover 12 for fixedly connecting with the box body 13. The box body 13 and the upper cover 12 are integrally and hermetically connected. The upper cover 12 is opened through the buckle structure 14, and the detection device 2 is arranged on the box body 13, and the upper cover 12 is flipped to the other side.

[0032] Embodiment 3

[0033] The power supply component 5 includes: a power supply interface 15, which is connected to 220v to supply power to the equipment, and a power switch 16, which turns on or off the operation of the equipment; the power supply interface 15 and the power switch 16 are arranged vertically on the inner surface of the box body 13 and are arranged on the left side of the oscilloscope 10.

[0034] The synchronization component 6 includes: a positive synchronization module 17 and a negative synchronization module 18. The positive synchronization module 17 is a positive signal synchronization interface, and the negative synchronization module 18 is a negative signal synchronization interface. The positive signal synchronization interface and the negative signal synchronization interface are arranged under the power supply component 5 and on the left side of the oscilloscope 10, and are connected to the on-site transformer to obtain the on-site synchronization signal, accurately locate the occurrence point of the discharge time, ensure that the data of different sensors can be obtained at the same time in the oscilloscope 10, and perform signal map detection to improve the recognition accuracy.

[0035] Embodiment 4

[0036] The sensor connection component 7 includes: a coaxial connection module 19 and an optical fiber connection module 20. The coaxial connection module 19 and the optical fiber connection module 20 are arranged adjacent to each other on the inner surface of the box body 13, and are arranged under the synchronization component 6 and on the left side of the oscilloscope 10.

[0037] The coaxial connection module 19 is a coaxial interface, and the optical fiber connection module 20 is an optical fiber interface. The ultra-high frequency sensor is connected through a coaxial cable and an optical fiber respectively to perform partial discharge detection. The sensor connection component 7 has a built-in amplification module to filter and amplify the signal, and then further transmit the signal to the oscilloscope 10.

[0038] Embodiment 5,

[0039] The network component 8 includes: a 5G module 21 and a WIFi module 22. The 5G module 21 and the WIFi module 22 are adjacently arranged on the inner surface of the box 13 and are arranged under the sensor connection component 7 and under the left side of the oscilloscope 10.

[0040] The signal transmission component 9 includes: a USB module 23 and a network port module 24. The USB module 23 and the network port module 24 are adjacently arranged on the inner surface of the box 13 and arranged under the network component 8. The USB module 23 and the network port module 24 are used to connect to back-end control platforms such as industrial computers and PCs to facilitate real-time display of partial discharge maps and positioning.

[0041] Embodiment 6,

[0042] The lifting structure 3 also includes: a lifting rod 26 and a sliding cavity 27. The sliding cavity 27 is arranged on the outer side surface of the box body 13 and on the side adjacent to the handle 25. The lifting rod 26 can be slidably arranged in the sliding cavity 27. The lifting rod 26 can be pulled out from the sliding cavity 27 and stuck in the sliding cavity 27 after extending a certain distance, so as to facilitate the lifting and movement of the tilting equipment box 1.

[0043] Two pulleys 28 are also provided on the box body 13. The two pulleys 28 and the lifting rod 26 are respectively provided at two ends of the same side of the box body 13, and one end is lifted and the other end is slid forward.

[0044] A handle 29 is provided on the lifting rod 26 .

[0045] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. An ultra-high frequency partial discharge detection device based on an oscilloscope, characterized in that: It includes an equipment box and a detection device arranged in the equipment box, the equipment box is provided with a lifting structure and can slide; the detection device comprises a partial discharge detection component, a power supply component, a synchronization component, a sensor connection component, a network component and a signal transmission component, the power supply component, the synchronization component, the sensor connection component, the network component and the signal transmission component are arranged from top to bottom and are arranged adjacent to the partial discharge component; the partial discharge detection component comprises: an oscilloscope and a keyboard, the oscilloscope and the keyboard are arranged up and down in the equipment box.

2. The ultra-high frequency partial discharge detection device based on an oscilloscope according to claim 1 is characterized in that: The equipment box comprises an upper cover and a box body, wherein the upper cover is integrally rotatably connected to one side of the box body, and a buckle structure is provided on the other side of the upper cover for fixed connection with the box body; the partial discharge detection component is arranged on the inner surface of the box body.

3. The ultra-high frequency partial discharge detection device based on an oscilloscope according to claim 1, characterized in that: The power supply component includes a power supply interface and a power switch, which are adjacently arranged on the inner surface of the box body and on the same side as the partial discharge detection component.

4. The ultra-high frequency partial discharge detection device based on an oscilloscope according to claim 1 is characterized in that: The synchronization component comprises a positive synchronization module and a negative synchronization module, and the positive synchronization module and the negative synchronization module are adjacently arranged on the inner surface of the box body and are arranged under the power supply component.

5. The ultra-high frequency partial discharge detection device based on an oscilloscope according to claim 1, characterized in that: The sensor connection component comprises a coaxial connection module and an optical fiber connection module, and the coaxial connection module and the optical fiber connection module are adjacently arranged on the inner surface of the box body and are arranged under the synchronization component.

6. The ultra-high frequency partial discharge detection device based on an oscilloscope according to claim 1, characterized in that: The network component includes a 5G module and a WIFi module, and the 5G module and the WIFi module are adjacently arranged on the inner surface of the box body and under the sensor connection component.

7. The ultra-high frequency partial discharge detection device based on an oscilloscope according to claim 1 is characterized in that: The signal transmission component includes a USB module and a network port module, and the USB module and the network port module are adjacently arranged on the inner surface of the box and are arranged under the network component.

8. The ultra-high frequency partial discharge detection device based on an oscilloscope according to claim 1, characterized in that: The lifting structure comprises a handle, which is arranged on one side of the box body and on the same side as the buckle structure.

9. The ultra-high frequency partial discharge detection device based on an oscilloscope according to claim 1, characterized in that: The lifting structure also includes a lifting rod and a sliding cavity. The sliding cavity is arranged inside the outer side of the box body and on the side adjacent to the handle. The lifting rod is slidably arranged in the sliding cavity. A pulley is also arranged on the box body. The pulley and the lifting rod are respectively arranged at both ends of the same side of the box body.

10. The ultra-high frequency partial discharge detection device based on an oscilloscope according to claim 9, characterized in that: A handle is arranged on the lifting rod.

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