Partial discharge monitoring device

Abstract

The utility model relates to the technical field of partial discharge monitoring, in particular to a partial discharge monitoring device, which comprises a monitoring host and a monitoring probe which are electrically connected, the waist part of the monitoring host penetrates through the bottom of a connecting mechanism, and the monitoring probe is arranged at the top of the connecting mechanism. A supporting rope is arranged at the upper end of the connecting mechanism in a penetrating mode, the supporting rope is of an annular structure, a first fixing mechanism and a second fixing mechanism are arranged at the two ends of the supporting rope respectively, and the first fixing mechanism and the second fixing mechanism are attached to the switch cabinet. Meanwhile, the second fixing mechanism controls the supporting rope to rotate to adjust the position of the monitoring probe; according to the utility model, the monitoring host and the monitoring probe are installed on the same connecting mechanism, the connecting mechanism is installed on the supporting rope, the two ends of the supporting rope are connected with the fixing mechanism, and in addition, the fixing mechanism is adhered to the switch cabinet, so that the monitoring host and the monitoring probe can be stably placed relative to the switch cabinet, and a long-time monitoring task can be completed.

Description

Technical Field

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

[0002] Substations are crucial hubs in power systems, and switchgear, as key equipment for controlling and protecting electrical equipment within substations, directly impacts the safety and stability of the power system. During long-term operation, the insulating components within switchgear, such as insulators, cable terminals, and busbars, experience a gradual decline in insulation performance due to various factors including electric fields, heat, and mechanical stress, potentially leading to partial discharge. Partial discharge gradually erodes the insulating material, further deteriorating its insulation performance and ultimately potentially causing insulation breakdown, resulting in serious accidents such as short circuits and power outages.

[0003] Currently, most partial discharge measurements are performed by professionals using handheld partial discharge testers. During operation, operators need to select test points, set test parameters, and accurately analyze and interpret the detected signals. Insufficient operator skills or experience may lead to inappropriate test point selection or unreasonable parameter settings, resulting in inaccurate detection of partial discharge signals or incorrect interpretations of the results. Furthermore, handheld partial discharge testers are primarily used for periodic or irregular on-site inspections and cannot perform real-time, long-term monitoring of switchgear. The partial discharge condition of switchgear may change over time, and handheld testers can only detect partial discharge at a specific moment, failing to capture the dynamic changes in the discharge process. For intermittent partial discharge phenomena, handheld testers may fail to detect them in time due to limited detection time, thus missing the optimal opportunity for fault warning.

[0004] If partial discharge monitoring of switchgear can be carried out over a long period of time, the real-time insulation status of the switchgear can be grasped, potential faults can be warned in advance, and maintenance personnel can make reasonable maintenance plans, reduce power outage time and frequency, and ensure reliable power supply to the power system. Summary of the Invention

[0005] The purpose of this invention is to overcome the aforementioned technical problems and provide a novel partial discharge monitoring device, aiming to achieve better monitoring.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A partial discharge monitoring device includes a monitoring host and a monitoring probe that are electrically connected. The monitoring host is disposed at the bottom of a connecting mechanism through its waist. The monitoring probe is mounted on the top of the connecting mechanism. A support rope is disposed through the upper end of the connecting mechanism. The support rope is configured as a loop structure. A first fixing mechanism and a second fixing mechanism are respectively disposed at both ends of the support rope. The first fixing mechanism and the second fixing mechanism are attached to the switch cabinet. At the same time, the second fixing mechanism controls the rotation of the support rope to adjust the position of the monitoring probe.

[0008] Furthermore, both the first fixing mechanism and the second fixing mechanism include a cylinder, a piston, and a threaded rod. The piston is sealed inside the cylinder, and the end of the threaded rod is inserted into the piston via a bearing connection, with the threaded rod threaded through the end wall of the cylinder.

[0009] Furthermore, an annular plate is integrally provided on the outer side of one end of the cylinder opening, and a sealing layer is provided on the side wall of the annular plate, which is in direct contact with the switch cabinet; a wheel is provided on the outer side of the cylinder through a bracket, and the two ends of the support rope are sleeved on the two wheels.

[0010] Furthermore, the second fixing mechanism also includes a motor and an electrical control box, both of which are mounted on the cylinder, and the power output shaft of the motor is connected to the central shaft of the wheel body; a polygonal groove is provided on the end face of the threaded rod protruding from the cylinder.

[0011] Furthermore, the connection mechanism includes a splicing plate assembly, which includes a main board. The main board has a mounting groove in the middle, and a clamping plate is bolted to the mounting groove. The end post of the monitoring probe passes through the space formed by the clamping plate and the main board.

[0012] Furthermore, a fixed arc plate is fixedly installed on the top of the main board, and a splicing arc plate is spliced ​​above the fixed arc plate. One side of the support rope passes through the space formed by the splicing arc plate and the fixed arc plate.

[0013] Furthermore, the bottom of the main board is provided with an extrusion groove, and an extrusion plate is provided at the extrusion groove by bolts. The other side of the support rope passes through the extrusion groove, and the extrusion plate presses against the support rope.

[0014] Furthermore, the connecting mechanism also includes a clamping device, which includes two symmetrically arranged clamping plates. A driving plate is installed at the adjacent ends of the two clamping plates, and the two driving plates are threaded onto both ends of the same bidirectional screw.

[0015] Furthermore, the connecting mechanism also includes a connecting plate, the top of which is hinged to the bottom of the main board, and the bottom of the connecting plate is fitted to the adjacent ends of the two clamping plates; a buckling groove and a buckling post are respectively provided on the side wall where the connecting plate and the clamping plates contact, the central angle of the buckling groove is greater than 180°, and the buckling post is installed in the buckling groove.

[0016] Furthermore, the bottom of the connecting plate is also provided with a sliding hole, which is located between two upper and lower distributed buckle grooves, and drives the plate through the sliding hole.

[0017] The beneficial effects of adopting the technical solution of this utility model are:

[0018] 1. The monitoring host and monitoring probe of the partial discharge monitoring device disclosed in this utility model are installed on the same connecting mechanism, and the connecting mechanism is installed on the support rope. At the same time, the two ends of the support rope are connected to the fixing mechanism. In addition, the fixing mechanism is attached to the switch cabinet, so that the monitoring host and monitoring probe can be stably placed relative to the switch cabinet and complete the long-term monitoring task.

[0019] 2. The fixing mechanism of the partial discharge monitoring device disclosed in this utility model includes a cylinder, a piston, etc., and the open end of the cylinder is attached to the switch cabinet. At the same time, the piston moves inside the cylinder, which can change the pressure of the cavity formed by the cylinder and the switch cabinet. Under the action of the internal and external pressure, the cylinder is adhered and installed on the switch cabinet, thereby realizing the stable installation of the monitoring host and the monitoring probe. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the first fixing mechanism in this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the cylinder and piston in this utility model;

[0024] Figure 4 This is a schematic diagram of the second fixing mechanism in this utility model;

[0025] Figure 5 This is a schematic diagram of the monitoring host, monitoring probe, and connecting mechanism in this utility model;

[0026] Figure 6 This is a schematic diagram of the connecting mechanism in this utility model;

[0027] Figure 7 This is a structural schematic diagram of the splicing panel assembly in this utility model;

[0028] Figure 8 This is a schematic diagram of the connecting plate and clamping device in this utility model;

[0029] Figure 9 This is a schematic diagram of the connecting plate in this utility model;

[0030] Figure 10 This is a schematic diagram of the clamping device in this utility model.

[0031] Marked in the image:

[0032] 1. Monitoring host; 2. Monitoring probe; 3. Support rope; 4. First fixing mechanism; 41. Cylinder; 42. Threaded rod; 43. Bracket; 44. Wheel; 45. Piston; 46. Sealing layer; 5. Second fixing mechanism; 51. Motor; 52. Electrical control box; 6. Connecting mechanism; 61. Connecting plate; 611. Snap-in groove; 612. Sliding hole; 62. Clamping device; 621. Clamping plate; 622. Snap-in post; 623. Driving plate; 624. Bidirectional screw; 625. Insertion hole; 63. Splicing plate assembly; 631. Main board; 632. Mounting groove; 633. Extrusion groove; 634. Fixing arc plate; 635. Splicing arc plate; 636. Clamping plate; 637. Extrusion plate. Detailed Implementation

[0033] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the terms "upper", "lower", "inner", "outer", etc. used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the technical solutions of this utility model and simplifying the description, and do not indicate or imply that the device or component 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.

[0034] In order to enable long-term measurement of partial discharge in switchgear, reduce the labor intensity of workers, and minimize the constraints on personnel during measurement, this embodiment provides a new device for monitoring partial discharge in switchgear.

[0035] like Figure 1 , Figure 5As shown, the device includes a monitoring host 1, a monitoring probe 2, a support rope 3, a first fixing mechanism 4, and a second fixing mechanism 5. The first fixing mechanism 4 and the second fixing mechanism 5 adhere to the side wall of the switchgear under the action of internal and external pressure difference, and are installed through both ends of the ring-shaped support rope 3. With the cooperation of the first fixing mechanism 4 and the second fixing mechanism 5, the support rope 3 is stably installed on the switchgear. Then, a connecting mechanism 6 is sleeved on the support rope 3, with the monitoring probe 2 installed on top of the connecting mechanism 6 and the monitoring host 1 located at the bottom of the connecting mechanism 6. The monitoring host 1 and the monitoring probe 2 are electrically connected, thus allowing the monitoring probe 2 to be stably positioned at a certain location on the switchgear, and enabling long-term monitoring of partial discharge at the location directly opposite it, under the action of the monitoring probe 2 and the monitoring host 1. If partial discharge monitoring is to be performed at multiple points simultaneously, multiple sets of connecting mechanisms 6, monitoring hosts 1, and monitoring probes 2 can be installed on the support rope 3 as needed.

[0036] Monitoring probe 2 is the core component of the device, mainly consisting of an ultrasonic sensor used to receive ultrasonic signals generated by partial discharge. It features high sensitivity and wideband response, and can convert ultrasonic signals into electrical signals for subsequent processing.

[0037] The monitoring host 1 includes a signal conditioning circuit (at least including a preamplifier and filter), a data acquisition module, a microprocessor, a display module, a storage module, and a power supply module, all housed within the casing. The signal conditioning circuit amplifies and filters the electrical signals output from the sensors, improving signal quality and enhancing their anti-interference capabilities, making them more suitable for subsequent analysis and measurement. The data acquisition module converts the conditioned analog signals into digital signals and acquires them at a specific sampling frequency and precision for processing and storage by a computer or microprocessor. The microprocessor, the "brain" of the device, controls the entire monitoring process, analyzes, calculates, and processes the acquired data, extracts characteristic parameters of partial discharge, such as discharge amplitude and frequency, and determines whether a partial discharge fault exists based on a preset algorithm. The display module, typically an LCD or OLED screen, displays measurement results, waveforms, characteristic parameters, and the device's operation menu, allowing operators to intuitively understand the monitoring status. The storage module (e.g., NAND flash memory and NOR flash memory) stores the acquired data and analysis results for subsequent retrieval, comparison, and further analysis. Storage capacity is generally large, meeting the storage needs of long-term monitoring data. The power module provides power to the device, typically using a rechargeable battery to ensure portability and mobility. The power module also includes charging and power management circuits to manage and protect the battery, extending its lifespan.

[0038] Using the aforementioned monitoring host 1 and monitoring probe 2, long-term continuous partial discharge monitoring can be achieved at a specific location within the switchgear. Furthermore, the monitoring host 1 can be equipped with wireless transmission methods such as ZigBee, GPRS, 4G / 5G to establish a reliable data transmission network, transmitting the collected partial discharge data to the monitoring center or remote terminal. This allows for real-time monitoring of the switchgear's insulation status and early warning of potential faults.

[0039] like Figure 2 , Figure 3 As shown, to ensure the first fixing mechanism 4 and the second fixing mechanism 5 are stably installed on the switchgear, both the first fixing mechanism 4 and the second fixing mechanism 5 include a cylinder 41, a piston 45, and a threaded rod 42. An annular plate is integrally formed on the outer side of the open end of the cylinder 41, and a sealing layer 46 is provided on the side wall of the annular plate. The piston 45 is sealed on the inner side of the cylinder 41. The end of the threaded rod 42 is inserted into the piston 45 via a bearing connection, and the threaded rod 42 is threaded through the end wall of the cylinder 41. A polygonal groove is provided on the end face of the threaded rod 42 protruding from the cylinder 41. When installing the first fixing mechanism 4 and the second fixing mechanism 5, the cylinder 41 is manually pressed to make the sealing layer 46 directly contact the switchgear. A multi-angle wrench is inserted into the polygonal groove, and the threaded rod 42 is rotated, forcing the piston 45 to move within the cylinder 41, changing the volume of the cavity formed by the cylinder 41 and the switchgear. Under the action of the pressure inside and outside the cylinder 41, the cylinder 41 is stably fitted onto the switchgear.

[0040] like Figure 2 As shown, a bracket 43 is fixedly installed on the outside of the cylinder 41. A wheel 44 is installed at the end of the bracket 43 away from the cylinder 41. The central shaft of the wheel 44 is connected through the end of the bracket 43 by a bearing. In addition, the two ends of the support rope 3 are sleeved on the two wheels 44. Therefore, the support rope 3 can be stably installed when the fixing mechanism is stably installed.

[0041] like Figure 4As shown, if the monitoring host 1 and monitoring probe 2 are limited, the support rope 3 can be controlled to rotate, adjusting the positions of the monitoring host 1 and monitoring probe 2 to complete timed monitoring of multiple points. Specifically, the second fixing mechanism 5 also includes a motor 51 and an electrical control box 52. Both the motor 51 and the electrical control box 52 are mounted on the cylinder 41, and the power output shaft of the motor 51 (which can be a servo motor, stepper motor, etc.) is connected to the central shaft of the wheel 44. The electrical control box 52 generally includes circuit breakers, contactors, thermal relays, intermediate relays, time relays, programmable logic controllers (PLCs), switching power supplies, transformers, etc., and can then control the operation of the motor 51, control the rotation of the wheel 44, and force the support rope 3 to rotate in both directions, thereby adjusting the positions of the monitoring host 1 and monitoring probe 2. It can even be equipped with network switches to achieve remote monitoring, data transmission, and distributed control.

[0042] like Figure 6 , Figure 7 As shown, in order to stably install the monitoring probe 2 on the connecting mechanism 6, the connecting mechanism 6 includes a splicing plate group 63, which includes a main board 631. The main board 631 has a mounting groove 632 in the middle. A clamping plate 636 is bolted to the mounting groove 632. The end post of the monitoring probe 2 passes through the space formed by the clamping plate 636 and the main board 631.

[0043] like Figure 7 As shown, to ensure the main board 631 is stably mounted on the support rope 3, a fixed arc plate 634 is fixedly installed on the top of the main board 631. A splicing arc plate 635 is spliced ​​above the fixed arc plate 634, and one side of the support rope 3 passes through the space formed by the splicing arc plate 635 and the fixed arc plate 634. A compression groove 633 is provided at the bottom of the main board 631, and a compression plate 637 is bolted to the compression groove 633. The other side of the support rope 3 passes through the compression groove 633, and the compression plate 637 presses against the support rope 3. This arrangement allows one side of the support rope 3 to be movably connected to the main board 631, while the other side is fixedly connected. With a stable connection between the main board 631 and the support rope 3, the movement of the main board 631 can be controlled as the support rope 3 rotates, providing convenience for adapting to different monitoring needs.

[0044] like Figure 6 , Figure 8 As shown, when the motherboard 631 is stably installed or moved, the monitoring host 1 is stably installed or moved synchronously. The connecting mechanism 6 also includes a connecting plate 61. The top of the connecting plate 61 is hinged to the bottom of the motherboard 631, and the bottom of the connecting plate 61 is connected to the clamping device 62. At the same time, the clamping device 62 is clamped and installed on the waist of the monitoring host 1, so that the monitoring probe 2 and the monitoring host 1 can remain relatively stationary.

[0045] like Figure 10 As shown, in order to stably install the clamping device 62 on the monitoring host 1, the clamping device 62 includes two symmetrically arranged clamping plates 621. Insertion holes 625 are provided at the adjacent ends of the two clamping plates 621. A driving plate 623 is inserted into the insertion hole 625 and connected to the clamping plate 621 by bolts. At the same time, the two driving plates 623 are threaded onto the two ends of the same bidirectional screw 624. Therefore, by rotating the bidirectional screw 624, the two driving plates 623 can be controlled to move closer or further away from each other, which facilitates the stable mounting of the clamping device 62 on the waist of the monitoring host 1.

[0046] like Figure 9 , Figure 10 As shown, in order to stably install the clamping plate 621 at the bottom of the connecting plate 61, the bottom of the connecting plate 61 is fitted with the adjacent ends of the two clamping plates 621. On the side wall where the connecting plate 61 and the clamping plate 621 contact, there are respectively a snap-fit ​​groove 611 and a snap-fit ​​post 622. The central angle of the snap-fit ​​groove 611 is greater than 180°, and the snap-fit ​​post 622 is detachably installed in the snap-fit ​​groove 611.

[0047] In addition, a sliding hole 612 is provided at the bottom of the connecting plate 61. The sliding hole 612 is located between two upper and lower distributed buckle grooves 611, which drive the plate 623 to pass through the sliding hole 612.

[0048] The above embodiments based on this utility model are provided for guidance. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. Any modifications or equivalent substitutions made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A partial discharge monitoring device, characterized in that: The device includes an electrically connected monitoring host (1) and a monitoring probe (2). The monitoring host (1) is located at the bottom of a connecting mechanism (6) through its waist. The monitoring probe (2) is installed at the top of the connecting mechanism (6). A support rope (3) is installed through the upper end of the connecting mechanism (6). The support rope (3) is designed as a loop structure. A first fixing mechanism (4) and a second fixing mechanism (5) are respectively installed at both ends of the support rope (3). The first fixing mechanism (4) and the second fixing mechanism (5) are attached to the light switch cabinet. At the same time, the second fixing mechanism (5) controls the support rope (3) to rotate and adjust the position of the monitoring probe (2).

2. The partial discharge monitoring device according to claim 1, characterized in that: The first fixing mechanism (4) and the second fixing mechanism (5) both include a cylinder (41), a piston (45) and a threaded rod (42). The piston (45) is sealed inside the cylinder (41). The end of the threaded rod (42) is inserted into the piston (45) through a bearing connection, and the threaded rod (42) is threaded through the end wall of the cylinder (41).

3. The partial discharge monitoring device according to claim 2, characterized in that: An integral ring plate is provided on the outer side of the opening end of the cylinder (41), and a sealing layer (46) is provided on the side wall of the ring plate. The sealing layer (46) is in direct contact with the switch cabinet. A wheel body (44) is provided on the outer side of the cylinder (41) through a bracket (43), and the two ends of the support rope (3) are sleeved on the two wheels (44).

4. The partial discharge monitoring device according to claim 3, characterized in that: The second fixing mechanism (5) also includes a motor (51) and an electrical control box (52), both of which are mounted on the cylinder (41), and the power output shaft of the motor (51) is connected to the central shaft of the wheel (44); a polygonal groove is provided on the end face of the threaded rod (42) protruding from the cylinder (41).

5. A partial discharge monitoring device according to claim 4, characterized in that: The connecting mechanism (6) includes a splicing plate assembly (63), which includes a main board (631). The main board (631) has a mounting groove (632) in the middle. A clamping plate (636) is bolted to the mounting groove (632). The end post of the monitoring probe (2) passes through the space formed by the clamping plate (636) and the main board (631).

6. A partial discharge monitoring device according to claim 5, characterized in that: A fixed arc plate (634) is fixedly installed on the top of the main board (631), and a splicing arc plate (635) is spliced ​​above the fixed arc plate (634). One side of the support rope (3) passes through the space formed by the splicing arc plate (635) and the fixed arc plate (634).

7. A partial discharge monitoring device according to claim 6, characterized in that: The bottom of the main board (631) is provided with an extrusion groove (633), and an extrusion plate (637) is provided at the extrusion groove (633) by bolts; the other side of the support rope (3) passes through the extrusion groove (633), and the extrusion plate (637) presses against the support rope (3).

8. A partial discharge monitoring device according to claim 5, characterized in that: The connecting mechanism (6) further includes a clamping device (62), which includes two symmetrically arranged clamping plates (621). A driving plate (623) is installed at the adjacent ends of the two clamping plates (621), and the two driving plates (623) are threaded onto both ends of the same bidirectional screw (624).

9. A partial discharge monitoring device according to claim 8, characterized in that: The connecting mechanism (6) further includes a connecting plate (61), the top of which is hinged to the bottom of the main board (631), and the bottom of which is attached to the adjacent ends of the two clamping plates (621); a buckle groove (611) and a buckle post (622) are respectively provided on the side wall where the connecting plate (61) and the clamping plate (621) contact, and the buckle post (622) is installed in the buckle groove (611).

10. A partial discharge monitoring device according to claim 9, characterized in that: The bottom of the connecting plate (61) is also provided with a sliding hole (612), which is located between two buckle grooves (611) distributed vertically, and the driving plate (623) is provided through the sliding hole (612).

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