Partial discharge on-line comprehensive monitoring device

Abstract

The utility model discloses a partial discharge on-line comprehensive monitoring device comprising a device main body, a monitoring host is positioned at a rear position in the device main body, and the monitoring host is provided with a short circuit grounding sensor, a high voltage live sensor, a locking alarm mechanism, an antenna, a grounding wire, a communicator and a working power supply. The high-voltage electrified sensor is connected with a coupling sensor, a coaxial line is connected between the high-voltage electrified sensor and the coupling sensor, the locking alarm mechanism is connected with a power supply input port, an electromagnetic lock and an alarm signal output interface, and the communicator is connected with a shielding line. According to the partial discharge on-line integrated monitoring device of the utility model, a high-voltage sensor matched with an original live display of a ring main unit is used as a front coupling sensor of a pulse partial discharge integrated monitoring instrument, so that partial discharge signals can be rapidly captured, partial discharge types can be accurately analyzed, and partial discharge positions can be accurately positioned.

Description

Technical Field

[0001] This utility model relates to the field of online integrated monitoring technology of discharge, and in particular to an online integrated monitoring device for partial discharge. Background Technology

[0002] The partial discharge online integrated monitoring device is a supporting equipment for pulse current type partial discharge monitoring using a direct method. Ring main units are used in large quantities in distribution network systems. The internal space of the ring main unit is small and the structure is complex, making it more prone to insulation defects. The main manifestation of insulation defects is the generation of partial discharge, and partial discharge is also the main cause of further deterioration of insulation defects. Therefore, there is an urgent need to develop an online monitoring device for partial discharge of ring main unit bay units, in response to the State Grid's call for "condition-based maintenance" and to reduce the cost of manual operation and maintenance. With the continuous development of technology, people have increasingly higher requirements for the manufacturing process of the partial discharge online integrated monitoring device. To this end, we propose an online integrated monitoring device for partial discharge. Utility Model Content

[0003] Technical problem solved: In view of the shortcomings of the existing technology, this utility model provides an online integrated monitoring device for partial discharge. It uses the high-voltage sensor of the original live display of the ring network cabinet as the pre-coupled sensor of the pulse partial discharge integrated monitoring instrument to quickly capture partial discharge signals, accurately analyze the type of partial discharge, and accurately locate the location of partial discharge, which can effectively solve the problems in the background technology.

[0004] Technical Solution: To achieve the above objectives, the technical solution adopted by this utility model is as follows: A partial discharge online integrated monitoring device, comprising a device body, wherein a monitoring host is positioned at the rear of the device body, and the monitoring host is equipped with a short-circuit grounding sensor, a high-voltage live sensor, a locking alarm mechanism, an antenna, a grounding wire, a communicator, and a working power supply; the high-voltage live sensor is connected to a coupling sensor, and a coaxial line is connected between the high-voltage live sensor and the coupling sensor; the locking alarm mechanism is connected to a power input port, an electromagnetic lock, and an alarm signal output interface; the communicator is connected to a shielded wire, the shielded wire is connected to a remote communication interface, and the working power supply is connected to a power interface.

[0005] Preferably, a damper is provided inside the main body of the device, located inside the nut. A buffer spring is positioned on the outer wall of the damper, a buffer frame is positioned at the end of the damper, and a protective pad is positioned on the inner surface of the buffer frame.

[0006] Preferably, a control panel is installed at the front end of the main body of the device, and locators are positioned at the four corners of the control panel and the main body of the device. The control panel is equipped with a display and control buttons, and nuts are positioned at the four corners of the sides of the main body of the device.

[0007] Preferably, the damper and the buffer spring are elastically movable on the inner side of the device body, and the damper is installed on the device body by a nut. The buffer spring and the damper drive the buffer frame to move elastically, and the buffer frame is glued and fixed to the protective pad.

[0008] Preferably, the main body of the device is fixed to the control panel by a locator, and the surface of the control panel is displayed and controlled by a display and control buttons.

[0009] Preferably, the high-voltage live sensor and the coupling sensor are electrically connected via a coaxial cable, the power interface provides power to the working power supply, and the communicator is connected to the remote communication interface via a shielded wire.

[0010] Beneficial effects: Compared with the prior art, this utility model provides an online integrated monitoring device for partial discharge, which has the following beneficial effects: This online integrated monitoring device for partial discharge utilizes the high-voltage sensor of the original live display of the ring network cabinet as the pre-coupled sensor of the pulse partial discharge integrated monitoring instrument, which can quickly capture partial discharge signals, accurately analyze the type of partial discharge, accurately locate the location of partial discharge, and has good sensitivity to sudden signal changes, so that insulation defects can be easily and quickly detected.

[0011] To understand the extent and future prospects of equipment insulation degradation, the degree of discharge can be determined by the measured waveform and statistical characteristic (φ-QN) spectrum of the current pulse, because the discharge current pulse contains relatively rich information.

[0012] The calibration method is relatively effective and easy to perform quantitative analysis.

[0013] The monitoring unit features an aluminum alloy casing, a highly integrated structure, small size, simple appearance, and easy installation. Panel mounting provides excellent electromagnetic compatibility and anti-interference capabilities. Plug-in terminals facilitate on-site wiring. The entire partial discharge online integrated monitoring device has a simple structure, is easy to operate, and performs better than traditional methods. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a partial discharge online integrated monitoring device according to the present invention.

[0015] Figure 2 This is a schematic diagram of the overall rear end structure of the partial discharge online integrated monitoring device of this utility model.

[0016] Figure 3 This is a schematic diagram of the internal buffer structure in the partial discharge online integrated monitoring device of this utility model.

[0017] Figure 4 This is a schematic diagram of the monitoring host in the partial discharge online integrated monitoring device of this utility model.

[0018] In the diagram: 1. Main body of the device; 2. Monitoring host; 3. Control panel; 4. Display; 5. Positioner; 6. Control button; 7. Nut; 8. Buffer spring; 9. Damper; 10. Buffer frame; 11. Protective pad; 12. Short circuit grounding sensor; 13. Locking alarm mechanism; 14. Antenna; 15. Grounding wire; 16. Communicator; 17. Working power supply; 18. Power interface; 19. Shielded wire; 20. Remote communication interface; 21. Alarm signal output interface; 22. Electromagnetic lock; 23. Power input port; 24. Coaxial cable; 25. Coupler sensor; 26. High voltage live sensor. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the embodiments described below are only some embodiments of this utility model, not all embodiments, and are only used to illustrate this utility model, and should not be regarded as limiting the scope of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 do not 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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.

[0022] like Figure 1-4 As shown, an online integrated monitoring device for partial discharge includes a main body 1. Inside the main body 1, a monitoring host 2 is positioned at the rear. The monitoring host 2 is equipped with a short-circuit grounding sensor 12, a high-voltage live sensor 26, a locking alarm mechanism 13, an antenna 14, a grounding wire 15, a communicator 16, and a power supply 17. The high-voltage live sensor 26 is connected to a coupling sensor 25, and a coaxial cable 24 connects the high-voltage live sensor 26 and the coupling sensor 25. The locking alarm mechanism 13 is connected to a power input port 23, an electromagnetic lock 22, and an alarm signal output interface 21. The communicator 16 is connected to a shielded wire 19, and the shielded wire 19 is connected to a remote communication interface 20. The power supply 17 is connected to a power interface 18. The high-voltage sensor, which is matched with the existing live display of the ring network cabinet, is used as the pre-coupled sensor of the pulse partial discharge integrated monitoring instrument to quickly capture partial discharge signals, accurately analyze the type of partial discharge, and precisely locate the location of partial discharge.

[0023] Furthermore, a damper 9 is provided inside the main body 1, located inside the nut 7. A buffer spring 8 is positioned on the outer wall of the damper 9, a buffer frame 10 is positioned at the end of the damper 9, and a protective pad 11 is positioned on the inner surface of the buffer frame 10.

[0024] Furthermore, a control panel 3 is installed at the front end of the main body 1, and positioners 5 are positioned at the four corners of the control panel 3 and the main body 1. The control panel 3 is equipped with a display 4 and control buttons 6, and nuts 7 are positioned at the four corners of the sides of the main body 1.

[0025] Furthermore, the damper 9 and the buffer spring 8 move elastically inside the device body 1, and the damper 9 is installed on the device body 1 by the nut 7. The buffer spring 8 and the damper 9 drive the buffer frame 10 to move elastically, and the buffer frame 10 is glued and fixed to the protective pad 11.

[0026] Furthermore, the main body 1 of the device is fixed to the control panel 3 by a locator 5, and the surface of the control panel 3 is displayed and controlled by a display 4 and control buttons 6.

[0027] Furthermore, the high-voltage live sensor 26 and the coupling sensor 25 are electrically connected via a coaxial cable 24, the power interface 18 provides power to the working power supply 17, and the communicator 16 is connected to the remote communication interface 20 via a shielded wire 19.

[0028] Working principle: This utility model includes a main body 1, a monitoring host 2, a control panel 3, a display 4, a locator 5, a control button 6, a nut 7, a buffer spring 8, a damper 9, a buffer frame 10, a protective pad 11, a short-circuit grounding sensor 12, a locking alarm mechanism 13, an antenna 14, a grounding wire 15, a communicator 16, a working power supply 17, a power interface 18, a shielded wire 19, a remote communication interface 20, an alarm signal output interface 21, an electromagnetic lock 22, a power input port 23, a coaxial cable 24, a coupling sensor 25, and a high-voltage live sensor 26. It utilizes the high-voltage sensor that is matched with the existing live display of the ring network cabinet as the pre-coupled sensor of the pulse partial discharge integrated monitoring instrument to quickly capture partial discharge signals, accurately analyze the partial discharge type, and precisely locate the partial discharge position.

[0029] Partial discharge online monitoring function

[0030] The partial discharge monitoring technology using the pulse current method acquires partial discharge signals inside high-voltage electrical equipment through high-voltage live sensors, exhibiting high monitoring sensitivity; it is capable of monitoring typical insulation defect types such as surface discharge, corona discharge, internal discharge, and floating potential.

[0031] Multiple intelligent data processing algorithms, such as pulse recognition, noise learning, and frequency correlation, are employed to ensure the authenticity and reliability of partial discharge data and to obtain the final diagnostic results.

[0032] The system can acquire high-frequency partial discharge signals online in real time, and monitor parameters including the probability intensity, average intensity, and frequency of partial discharge; the relevant data can be viewed on the display screen in real time.

[0033] It has an intelligent graded alarm function, which can issue graded alarm signals in a timely manner according to the severity of partial discharge, and the alarm-related parameters can be flexibly configured;

[0034] It features automatic noise level detection and, combined with hardware filtering and pulse comparison methods, can effectively remove noise interference signals and resist complex electromagnetic interference environments on site.

[0035] The calibration function for partial discharge monitoring can be performed under energized operating conditions to ensure the adaptability of the calibration coefficients to the power grid operating conditions to the greatest extent possible.

[0036] High voltage live indication and phase comparison function

[0037] It has the function of indicating the energized status of high-voltage energized circuits;

[0038] It has a live forced interlocking exit, which can be used with an electromagnetic lock to forcibly interlock the switch cabinet operating handle and mesh door, thereby preventing the grounding switch from being closed while energized, preventing accidental entry into the live compartment, and improving the anti-misoperation performance of the switch equipment;

[0039] Equipped with a phase test terminal, the front panel features a socket for a capacitive voltage detection system, facilitating on-site dual-circuit phase verification for users.

[0040] Historical data storage function

[0041] It has an event logging function, which can record partial discharge alarm events, temperature alarm events, line fault events, etc.

[0042] It has a logging function, which includes information such as system login, status exceptions, and parameter modifications;

[0043] It has the function of recording monitoring data such as partial discharge data and temperature data to ensure that no key information is missed;

[0044] It has the function of reading and exporting historical data, records and other information.

[0045] Communication function

[0046] It features one RS-485 port and one Type-C standard communication interface;

[0047] Supports communication protocols such as Modbus-RTU; supports short-range wireless communication;

[0048] Monitoring data such as partial discharge, temperature, and alarm signals can be connected to the DTU or IoT device installed on site;

[0049] The Type-C USB interface can be used for on-site debugging, data downloading, calibration, and reading internal monitoring data;

[0050] Supports remote control reset of alarm signals;

[0051] It has the function of monitoring communication connection status and message exchange.

[0052] Pulse Current Method: The CG-JF-02 Pulse Partial Discharge Integrated Monitor consists of a monitoring host, high-voltage live sensors, and other components. Based on pulse current method partial discharge detection technology, this direct method offers higher monitoring sensitivity and comprehensively monitors various types of partial discharge in power distribution equipment. It acquires partial discharge detection signals from the high-voltage live sensors in the switchgear, filters and conditions them to achieve real-time monitoring of the partial discharge status. The device uses long-life OLED devices to display key monitoring parameters and communication circuit connection status in real time. It also supports flexible local configuration of operating parameters; uses an RS485 communication interface to connect to a DTU or communication unit for remote data transmission; and, combined with high-voltage sensors, reflects the live status of high-voltage circuits. Furthermore, it can be used with electromagnetic locks to forcibly lock switch handles and valves.

[0053] The pulsed current method is widely used in relatively hot partial discharge detection devices both domestically and internationally. Compared with traditional non-electrical detection methods, it has the following advantages:

[0054] The sudden change signal has good sensitivity, and insulation defects can be easily and quickly detected;

[0055] To understand the extent and future prospects of equipment insulation degradation, the degree of discharge can be determined by the measured waveform and statistical characteristic (φ-QN) spectrum of the current pulse, because the discharge current pulse contains relatively rich information.

[0056] The calibration method is relatively effective and easy to perform quantitative analysis.

[0057] The monitoring unit features an aluminum alloy casing, a highly integrated structure, small size, simple appearance, and easy installation. Panel mounting provides excellent electromagnetic compatibility and anti-interference capabilities; pluggable terminals facilitate on-site installation and wiring.

[0058] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A partial discharge online integrated monitoring device, comprising a device body (1), characterized in that: The monitoring host (2) is located at the rear of the main body (1) of the device. The monitoring host (2) is equipped with a short-circuit grounding sensor (12), a high-voltage live sensor (26), a locking alarm mechanism (13), an antenna (14), a grounding wire (15), a communicator (16), and a working power supply (17). The high-voltage live sensor (26) is connected to a coupling sensor (25). A coaxial cable (24) is connected between the high-voltage live sensor (26) and the coupling sensor (25). The locking alarm mechanism (13) is connected to a power input port (23), an electromagnetic lock (22), and an alarm signal output interface (21). The communicator (16) is connected to a shielded wire (19). The shielded wire (19) is connected to a remote communication interface (20). The working power supply (17) is connected to a power interface (18).

2. The partial discharge online integrated monitoring device according to claim 1, characterized in that: The device body (1) is equipped with a damper (9) inside the nut (7). A buffer spring (8) is positioned on the outer wall of the damper (9). A buffer frame (10) is positioned at the end of the damper (9). A protective pad (11) is positioned on the inner surface of the buffer frame (10).

3. The partial discharge online integrated monitoring device according to claim 1, characterized in that: A control panel (3) is installed at the front end of the main body (1) of the device. Positioners (5) are positioned at the four corners of the control panel (3) and the main body (1). A display (4) and control buttons (6) are provided on the control panel (3). Nuts (7) are positioned at the four corners of the side of the main body (1).

4. The partial discharge online integrated monitoring device according to claim 2, characterized in that: The damper (9) and the buffer spring (8) move elastically on the inner side of the device body (1), and the damper (9) is installed on the device body (1) by a nut (7). The buffer spring (8) and the damper (9) drive the buffer frame (10) to move elastically. The buffer frame (10) and the protective pad (11) are glued and fixed together.

5. The partial discharge online integrated monitoring device according to claim 3, characterized in that: The main body (1) of the device is fixed to the control panel (3) by a locator (5), and the surface of the control panel (3) is displayed and controlled by a display (4) and control buttons (6).

6. The partial discharge online integrated monitoring device according to claim 1, characterized in that: The high-voltage live sensor (26) and the coupling sensor (25) are electrically connected via a coaxial cable (24). The power interface (18) provides power to the working power supply (17). The communicator (16) is connected to the remote communication interface (20) via a shielded wire (19).

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