Distribution network fault distance measurement monitoring device

Abstract

The utility model discloses a distribution network fault distance measurement monitoring device, and relates to the technical field of cable fault monitoring. Comprising a plurality of sub-monitoring devices and a plurality of traveling wave sensors connected in sequence through cables, each traveling wave sensor is connected with the corresponding sub-monitoring device, each sub-monitoring device comprises a base and a cover plate rotationally connected with the base through a hinge, the traveling wave sensors are located in an annular groove of a mounting base, and a baffle is arranged on one side of the mounting base; a magnet for fixing the mounting seat is arranged in a mounting groove in the top end of the mounting seat; through holes are symmetrically formed in the surface of the mounting seat outside two sides of the mounting groove; the plurality of traveling wave sensors are sequentially connected through the cable, so that real-time online monitoring is carried out on the cable insulation state during operation of a distribution network cable line, the position interval of a fault point can be quickly positioned when the cable breaks down, and the troubleshooting range can be narrowed.

Description

Technical Field

[0001] The utility model relates to the technical field of cable fault monitoring, in particular to a distribution network fault distance measurement monitoring device. Background Art

[0002] The trend of urbanization is superimposed on the demand for reliability, and the cabling rate is increasing year by year. In cities, cable ring network cabinets are densely populated and cables are laid underground. The causes of cable failures include: external force damage, long-term overload operation, cable production and construction technology, etc. The accident location is uncertain and sudden, and it is difficult to find a fault once it occurs.

[0003] In the prior art, the cable fault location method adopts offline detection technology, which requires power outage and removal of cable joints, which is time-consuming and cumbersome to operate. It cannot timely detect faults, and has low accuracy and efficiency, and cannot meet the needs of modern distribution networks. In addition, some monitoring devices are equipped with sensors to collect traveling wave signals generated by discharge of cable insulation defects, but the sensors are not well fixed. After long-term use, the sensors are easy to deviate from the original installation position and are difficult to adapt to different installation requirements. Utility Model Content

[0004] In view of the above technical deficiencies, the utility model provides a distribution network fault distance monitoring device to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the utility model is implemented through the following technical solutions:

[0006] A distribution network fault ranging monitoring device comprises: a plurality of sub-monitoring devices and a plurality of traveling wave sensors connected in sequence by cables, each of the traveling wave sensors is connected to a corresponding sub-monitoring device, the sub-monitoring device comprises: a base and a cover plate rotatably connected to the base by a hinge, the traveling wave sensor is located in an annular groove of a mounting seat, a baffle is provided on one side of the mounting seat, a magnet for fixing the mounting seat is provided in the mounting groove at the top of the mounting seat, and through holes are symmetrically provided on the surface of the mounting seat outside the two sides of the mounting groove.

[0007] Furthermore, a first track is symmetrically arranged on the inner wall at the top of the base, a second track is symmetrically arranged on the inner wall at the top of the cover plate, which is opposite to the first track and spaced a certain distance apart, a third track is arranged on the inner wall at the top of the cover plate between the two second tracks, a limit plate integrally formed with the sliding block is slidably connected in the second track, a sliding key is arranged in the sliding groove of the outer wall at the top of the cover plate, a first clamping block arranged at the bottom end of the sliding block passes through the cover plate and cooperates with the sliding block located in the third track, and a second clamping block cooperating with a clamping strip on the inner wall at the top of the cover plate is symmetrically arranged on the end of the sliding block away from the limit plate.

[0008] Furthermore, first grooves are symmetrically arranged on both sides of the base, and second grooves are symmetrically arranged on both sides of the cover plate, and the first groove and the second groove are aligned to form a wire passing channel.

[0009] Furthermore, a first guide groove is provided at the bottom end of the mounting seat, and a second guide groove is provided at one side of the mounting seat.

[0010] Furthermore, a controller, a wireless communication module and a power supply are provided in the base, the power supply is respectively connected to the controller, the wireless communication module and the traveling wave sensor, the controller is connected to the traveling wave sensor and the wireless communication module, and the wireless communication module is connected to the client.

[0011] Furthermore, at least one CT power taking coil is arranged in the base.

[0012] Furthermore, the sliding key is provided with anti-slip grooves.

[0013] The beneficial effects of the utility model are:

[0014] Several traveling wave sensors are connected in sequence through cables, thereby performing real-time online monitoring of the cable insulation status of the distribution network cable line during operation. When a cable fault occurs, the location interval of the fault point can be quickly located, that is, it is determined within which two ring network cabinets the fault point is located, thereby narrowing the scope of fault investigation. In addition, by providing a mounting base to provide a variety of ways to fix the traveling wave sensor, the traveling wave sensor can be stably installed in the required position and can adapt to different installation requirements and environmental conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the monitoring device.

[0016] Figure 2 Schematic diagram of the internal structure of the base.

[0017] Figure 3 A schematic diagram of the structure of the cover plate.

[0018] Figure 4 This is a schematic diagram of the structure of the cover from another angle.

[0019] Figure 5 It is a schematic diagram of the structure of the sliding key and the limiting plate.

[0020] Figure 6 This is a bottom view of the cover plate and the limit plate after they are matched.

[0021] Figure 7 Schematic diagram of the internal structure of the mounting base.

[0022] In the figure, 1, sub-monitoring device; 2, traveling wave sensor; 3, base; 4, cover plate; 5, mounting seat; 6, annular groove; 7, baffle; 8, mounting groove; 9, magnet; 10, through hole; 11, first track; 12, second track; 13, third track; 14, sliding block; 15, limit plate; 16, sliding groove; 17, sliding key; 18, first clamping block; 19, clamping strip; 20, second clamping block; 21, first groove; 22, second groove; 23, first guide groove; 24, second guide groove; 25, controller; 26, wireless communication module; 27, power supply; 28, CT power supply coil. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The utility model provides Figures 1 to 7 In combination with the shown distribution network fault ranging monitoring device, it includes: a plurality of sub-monitoring devices 1 and a plurality of traveling wave sensors 2 connected in sequence by cables, each of the traveling wave sensors 2 is connected to the corresponding sub-monitoring device 1, and the sub-monitoring device 1 includes: a base 3 and a cover plate 4 rotatably connected to the base 3 by a hinge, the traveling wave sensor 2 is located in an annular groove 6 of a mounting seat 5, a baffle 7 is provided on one side of the mounting seat 5, a magnet 9 for fixing the mounting seat 5 is provided in the mounting groove 8 at the top of the mounting seat 5, and through holes 10 are symmetrically provided on the surface of the mounting seat 5 outside the mounting groove 8 on both sides.

[0025] Among them, each ring network cabinet is provided with a sub-monitoring device 1 and a traveling wave sensor 2 corresponding to the sub-monitoring device 1. Several traveling wave sensors 2 are connected in sequence through cables, thereby performing real-time online monitoring of the cable insulation status of the distribution network cable line during operation. The traveling wave signal generated by the discharge of the cable insulation defect will be monitored and recorded by the traveling wave sensor 2, and then sent to the client's fault diagnosis system through the wireless communication module 26 of the corresponding sub-monitoring device 1. The fault diagnosis system based on the artificial intelligence deep learning algorithm automatically extracts and identifies fault characteristics, accurately locates the position of the fault point, and generates two-dimensional and three-dimensional trend graphs based on amplitude, position and time in the background, and warns the user of hidden danger points with the same position, multiple frequencies and gradually increasing discharge amplitude; and the fault diagnosis system can quickly locate the fault point position interval according to the fault current waveform phase analysis uploaded by the sub-monitoring device 1, that is, determine which two ring network cabinets the fault point is located in, which can narrow the scope of fault investigation.

[0026] In addition, a magnet 9 for fixing the mounting base 5 is provided in the mounting groove 8 at the top of the mounting base 5, and the magnet 9 can be adsorbed onto a suitable metal surface, thereby ensuring that the mounting base 5 is firmly fixed at the desired position, and further ensuring that the traveling wave sensor 2 is firmly fixed at the desired position; a through hole 10 is provided to provide an additional fixing method, and during installation, the mounting base 5 can be firmly fixed at the desired position by screws, and further ensuring that the traveling wave sensor 2 is firmly fixed at the desired position, so as to ensure the stability and safety of the installation; by providing the mounting base 5 to provide a variety of ways to fix the traveling wave sensor 2, the traveling wave sensor 2 can be firmly installed at the desired position and can adapt to different installation requirements and environmental conditions.

[0027] In an optional embodiment, if Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown in combination, the inner wall of the top end of the base 3 is symmetrically provided with a first track 11, the inner wall of the top end of the cover plate 4 is symmetrically provided with a second track 12 which is opposite to the first track 11 and spaced a certain distance apart, and the inner wall of the top end of the cover plate 4 between the two second tracks 12 is provided with a third track 13, a limiting plate 15 which is integrally formed with a sliding block 14 is slidably connected in the second track 12, a sliding key 17 is provided in the sliding groove 16 of the outer wall of the top end of the cover plate 4, a first clamping block 18 arranged at the bottom end of the sliding block 14 passes through the cover plate 4 and cooperates with the sliding block 14 located in the third track 13, and a second clamping block 20 which cooperates with a clamping strip 19 on the inner wall of the top end of the cover plate 4 is symmetrically provided at one end of the sliding block 14 away from the limiting plate 15.

[0028] When the cover 4 is in the closed state, the sliding key 17 is located at the front end of the sliding groove 16. At this time, one part of the limiting plate 15 is located in the first track 11, and the other part is located in the second track 12. When the cover 4 is in the closed state and the user needs to open the cover 4 to maintain the modules in the base 3, the sliding key 17 is first slid backward to the rear end of the sliding groove 16, and the sliding key 17 will drive the sliding block 14 to move backward along the third track 13, and then drive the limiting plate 15 integrally formed with the sliding block 14 to move from the first track 11 to the second track 12. At this time, the entire limiting plate 15 is located in the second track 12 without Then it is located in the first track 11, and the user can quickly open the cover 4 to maintain the various modules in the base 3; after the user completes the maintenance operation, turn the cover 4 and close it, and at this time slide the sliding key 17 forward to the front end of the sliding groove 16, the sliding key 17 will drive the sliding block 14 to move forward along the third track 13, and then drive the limiting plate 15 integrally formed with the sliding block 14 to move from the second track 12 to the first track 11. At this time, one part of the limiting plate 15 is located in the first track 11, and the other part is located in the second track 12. The user cannot directly open the cover 4, so as to achieve quick locking of the cover 4 after the maintenance is completed.

[0029] Furthermore, the sliding block 14 is fixedly connected to the second clamping block 20. After the sliding key 17 drives the sliding block 14 to move to the corresponding position, the second clamping block 20 and the clamping strip 19 cooperate to fix the sliding block 14 in the moved position, especially when the base 3 and the cover 4 are locked, it is ensured that the cover 4 will not open automatically, thereby quickly and firmly locking the cover 4 after maintenance is completed.

[0030] In addition, the second track 12 symmetrically arranged on the inner wall at the top of the cover 4 is opposite to the first track 11 and is separated by a certain distance. A certain interval is left in the area where the first track 11 and the second track 12 are close to each other. This can avoid the first track 11 and the second track 12 being too close to each other, resulting in the cover 4 being unable to flip relative to the base 3, thereby ensuring the normal unlocking of the cover 4 during maintenance, which is beneficial for users to maintain the various modules in the base 3.

[0031] In an optional embodiment, if Figure 2 and Figure 3 As shown in the figure, first grooves 21 are symmetrically provided on both sides of the base 3, and second grooves 22 are symmetrically provided on both sides of the cover plate 4. The first grooves 21 and the second grooves 22 are aligned to form a wire passage.

[0032] During installation, the cable is inserted from one end of the wire passage, and then passes through the CT power taking coil 28 in the base 3 in sequence, and then extends out from the other end of the wire passage, thereby ensuring the normal installation of the cable and the sub-monitoring device 1.

[0033] In an optional embodiment, if Figure 1 and Figure 7 As shown in the figure, a first guide groove 23 is provided at the bottom end of the mounting seat 5 , and a second guide groove 24 is provided at one side of the mounting seat 5 .

[0034] The first guide groove 23 and the second guide groove 24 are provided on the mounting seat 5 to facilitate the cable connected to the traveling wave sensor 2 to extend out of the mounting seat 5, thereby ensuring that the traveling wave sensor 2 and the sub-monitoring device 1 can be normally connected.

[0035] In an optional embodiment, if Figure 2 As shown, the base 3 is provided with a controller 25, a wireless communication module 26 and a power supply 27. The power supply 27 is respectively connected to the controller 25, the wireless communication module 26 and the traveling wave sensor 2. The controller 25 is connected to the traveling wave sensor 2 and the wireless communication module 26. The wireless communication module 26 is connected to the client.

[0036] Among them, the power supply 27 is used to power the controller 25, the traveling wave sensor 2 and the wireless communication module 26. The traveling wave sensor 2 collects and records the traveling wave signal generated by the discharge of the cable insulation defect, and then sends it to the client's fault diagnosis system through the wireless communication module 26 of the corresponding sub-monitoring device 1 under the control of the controller 25.

[0037] In an optional embodiment, if Figure 2 As shown, at least one CT power taking coil 28 is arranged in the base 3 .

[0038] The monitoring device can obtain sufficient electrical energy from the cable through the CT power coil 28 and provide it to the controller 25, the traveling wave sensor 2 and the wireless communication module 26 to ensure the normal operation of the monitoring device.

[0039] In an optional embodiment, if Figure 5 As shown, the sliding key 17 is provided with anti-slip grooves.

[0040] Among them, by setting anti-slip patterns on the surface of the sliding key 17, the relative sliding between the finger and the sliding key 17 can be effectively avoided, thereby reducing operational errors or inaccuracies caused by finger sliding; the anti-slip patterns can also increase the roughness of the surface of the sliding key 17, improve the friction between the finger and the sliding key 17, and make it easier for the user to perceive the position and state of the sliding key 17 during operation, which is beneficial for the user to achieve locking or unlocking of both the cover 4 and the base 3.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A distribution network fault distance monitoring device, characterized in that: include: A plurality of sub-monitoring devices (1) and a plurality of traveling wave sensors (2) connected in sequence via cables, each of the traveling wave sensors (2) being connected to a corresponding sub-monitoring device (1), the sub-monitoring device (1) comprising: a base (3) and a cover plate (4) rotatably connected to the base (3) via a hinge, the traveling wave sensor (2) being located in an annular groove (6) of a mounting seat (5), a baffle plate (7) being provided on one side of the mounting seat (5), a magnet (9) for fixing the mounting seat (5) being provided in a mounting groove (8) at the top end of the mounting seat (5), and through holes (10) being symmetrically provided on the surface of the mounting seat (5) outside both sides of the mounting groove (8).

2. A distribution network fault distance monitoring device according to claim 1, characterized in that: The inner wall at the top of the base (3) is symmetrically provided with a first track (11); the inner wall at the top of the cover plate (4) is symmetrically provided with a second track (12) which is opposite to the first track (11) and is spaced a certain distance away; the inner wall at the top of the cover plate (4) is provided with a third track (13); a limit plate (15) which is integrally formed with the sliding block (14) is slidably connected in the second track (12); a sliding key (17) is provided in the sliding groove (16) on the outer wall at the top of the cover plate (4); a first clamping block (18) provided at the bottom end of the sliding block (14) passes through the cover plate (4) and cooperates with the sliding block (14) located in the third track (13); and a second clamping block (20) which cooperates with a clamping strip (19) on the inner wall at the top of the cover plate (4) is symmetrically provided at one end of the sliding block (14) away from the limit plate (15).

3. A distribution network fault distance monitoring device according to claim 1, characterized in that: The base (3) is symmetrically provided with first grooves (21) on both sides, and the cover plate (4) is symmetrically provided with second grooves (22) on both sides, and the first groove (21) and the second groove (22) are aligned to form a wire passage.

4. A distribution network fault distance monitoring device according to claim 1, characterized in that: A first guide groove (23) is provided at the bottom end of the mounting seat (5), and a second guide groove (24) is provided on one side of the mounting seat (5).

5. A distribution network fault distance monitoring device according to claim 1, characterized in that: A controller (25), a wireless communication module (26) and a power supply (27) are arranged in the base (3); the power supply (27) is respectively connected to the controller (25), the wireless communication module (26) and the traveling wave sensor (2); the controller (25) is connected to the traveling wave sensor (2) and the wireless communication module (26); and the wireless communication module (26) is connected to the client.

6. A distribution network fault distance monitoring device according to claim 1, characterized in that: At least one CT power extraction coil (28) is arranged in the base (3).

7. A distribution network fault distance monitoring device according to claim 2, characterized in that: The sliding key (17) is provided with anti-slip grooves.

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