Power transmission line distributed fault monitoring device with positioning structure and monitoring method

Abstract

The invention relates to a power transmission line distributed fault monitoring device with a positioning structure and a monitoring method, the power transmission line distributed fault monitoring device comprises a mounting plate, a mounting box, a connecting mechanism, an adjusting mechanism and a monitoring terminal, and the middle part of the mounting box is provided with a wire passing groove through which a power transmission line passes; the connecting mechanism is fixedly connected to the side wall of the mounting box, and a through hole penetrates through the connecting mechanism in the moving direction of the mounting box; the adjusting mechanism comprises a lead screw, a first nut and a second nut, the two ends of the lead screw are fixedly connected with the two adjacent mounting plates respectively, the lead screw is movably sleeved with the connecting mechanism through the through hole, and the first nut and the second nut are connected to the lead screw in a threaded and sleeving mode and located on the two sides of the connecting mechanism respectively. According to the device, the monitoring device does not need to be disassembled for reinstallation, only the positions of the first nut and the second nut need to be rotated and adjusted, the positions of the connecting mechanism and the installation box are adjusted, the risk that the monitoring device is damaged or parts fall off due to disassembly is avoided, the installation mode is convenient, and the use efficiency of the monitoring device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission line fault monitoring, and in particular to a power transmission line distributed fault monitoring device with a positioning structure and a monitoring method. Background Art

[0002] The distributed fault diagnosis system of transmission lines obtains the traveling wave current at the time of fault through distributed monitoring terminals installed on the conductors to accurately determine the fault location.

[0003] After searching, the Chinese patent authorization announcement number CN215340148U discloses a distributed fault monitoring device for power transmission lines with a positioning structure, which belongs to the field of line monitoring. A distributed fault monitoring device for power transmission lines with a positioning structure, comprising a lower shell and an upper shell rotatably connected by a rotating shaft, a clamping plate matching the lower shell and the upper shell is slidably installed inside, a threaded rod is rotatably installed on the side wall of the lower shell and the upper shell, and a threaded plate rotatably connected to the threaded rod is fixed on the side end faces of the two clamping plates, a wire hole is provided at the left and right sides of the lower shell and the upper shell, a partition is provided in the wire hole, and the wire hole and the partition are connected and fixed by a first spring, and the upper end of the front side of the lower shell and the lower end of the front side of the upper shell are respectively provided with a lower clamping block and an upper clamping block that can be connected to each other, and the lower clamping block and the lower shell are connected and fixed by a second spring; the advantage of this application is that the distance between the two clamping plates can be adjusted by the threaded rod, which is convenient for clamping and fixing the mutual inductor. However, when the fault monitoring device is installed, the position needs to be fixed. Since the monitoring device is installed separately on the transmission line, the connection between the monitoring device and the transmission line needs to be very tight. When the staff needs to perform real-time monitoring based on the adjacent monitoring devices, it may be necessary to adjust the position of a certain monitoring device at that location. At this time, not only does it need to dismantle and reinstall the monitoring device, but there may also be risks of damage to the monitoring device or parts falling off due to disassembly, which makes the installation of the monitoring device inconvenient and reduces the use efficiency of the monitoring device. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a distributed fault monitoring device and a monitoring method for a power transmission line with a positioning structure, so as to overcome the deficiencies in the above-mentioned prior art.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: a distributed fault monitoring device for a power transmission line with a positioning structure, comprising a mounting plate, a mounting box, a connecting mechanism, an adjusting mechanism and a monitoring terminal, a plurality of mounting plates are provided, and are fixedly arranged between two adjacent substations at intervals, the monitoring terminal is arranged inside the mounting box, and a line groove for the transmission line to pass through is penetrated in the middle of the mounting box along its moving direction;

[0006] The connecting mechanism is fixedly connected to the side wall of the installation box, and a through hole is set through the connecting mechanism along the moving direction of the installation box; the adjusting mechanism includes a screw rod, a first nut and a second nut, and the two ends of the screw rod are respectively fixedly connected to two adjacent mounting plates. The connecting mechanism is movably sleeved on the screw rod through the through hole, and the first nut and the second nut are both threadedly sleeved on the screw rod, and are respectively located on both sides of the connecting structure.

[0007] The beneficial effects of the present invention are as follows: during use, an installation box is arranged between every two adjacent installation plates, and the arrival time of the initial traveling wave generated by the fault point is monitored by the monitoring terminals in the two adjacent installation boxes, which is facilitating the judgment of the position of the fault point; when adjusting the position of the device, there is no need to disassemble and reinstall the monitoring device, and only the position of the first nut and the second nut need to be rotated and adjusted to achieve the position adjustment of the connecting mechanism and the installation box, thereby avoiding the risk of damage to the monitoring device or falling of parts due to disassembly, and the installation method is convenient, which improves the use efficiency of the monitoring device.

[0008] Based on the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, the installation box includes an upper shell and a lower shell, one side of the upper shell and the lower shell are hinged, and the other side is detachably connected by bolts, and the opposite surfaces of the upper shell and the lower shell are respectively provided with first semi-arc grooves, and a wire groove is formed between the two first semi-arc grooves.

[0010] Furthermore, the connecting mechanism includes a fixed block, a connecting block and a fixing bolt. The fixed block is fixedly connected to the side wall of the installation box. The connecting block is detachably connected to the fixed block through the fixing bolt. The adjacent surfaces of the fixed block and the connecting block are provided with matching second semi-arc grooves, and the two second semi-arc grooves form a through hole.

[0011] Furthermore, it also includes two sets of limiting mechanisms, which are respectively arranged on both sides of the connecting mechanism, the limiting mechanisms include a fixing plate, a tensioning spring, a supporting plate and a limiting rod, and the peripheral walls of the first nut and the second nut are respectively provided with limiting holes at equal intervals;

[0012] The fixing plate is fixedly connected to the side wall of the installation box, the supporting plate is connected to the fixing plate through a tensioning spring, one end of the limiting rod is connected to a side of the supporting plate away from the fixing plate, and the other end of the limiting rod is movably inserted into the limiting hole.

[0013] Furthermore, the limiting mechanism also includes a telescopic rod, a fixed end of the telescopic rod is fixedly connected to the fixed plate, and a movable end of the telescopic rod is fixedly connected to the support plate.

[0014] Furthermore, both ends of the line trough are sealed and connected to the transmission line through annular sealing gaskets.

[0015] The present invention also discloses a distributed monitoring method for a power transmission line, which uses the above-mentioned distributed fault monitoring device for a power transmission line, and comprises the following steps:

[0016] Step S01: installing a mounting box between every two adjacent mounting plates;

[0017] Step S02: adjusting the distance between two adjacent installation boxes, and using the distance as the fault monitoring distance of the transmission line;

[0018] Step S03: Real-time monitoring of the transmission line is performed through the monitoring terminals in the two installation boxes respectively, and the time when the initial traveling wave generated by the fault point reaches the two monitoring terminals respectively is collected;

[0019] Step S04: Based on the fault monitoring distance and the time when the initial traveling wave reaches the two monitoring terminals, the distance from the fault point to the two monitoring terminals is calculated.

[0020] The beneficial effect of the present invention is that the arrival time of the initial traveling wave generated by the fault point is monitored by the monitoring terminals in the two installation boxes, which is beneficial to the judgment of the position of the fault point. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the installation box of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the installation box of the present invention being opened;

[0024] Figure 4 This is a schematic diagram of the structure of the fixed block of the present invention;

[0025] Figure 5 This is a schematic diagram of the connection block structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the first nut structure of the present invention;

[0027] Figure 7 For the present invention Figure 2 A magnified view of the structure at center;

[0028] Figure 8 It is a schematic diagram of the double-end traveling wave positioning structure of the present invention.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1. Mounting plate; 2. Mounting box; 21. Upper shell; 22. Lower shell; 2121. Wire groove; 3. Limiting mechanism; 31. Fixing plate; 32. Tensioning spring; 33. Support plate; 34. Limiting rod; 35. Telescopic rod; 4. Connecting mechanism; 41. Fixing block; 42. Connecting block; 43. Fixing bolt; 4121. Through hole; 5. Adjusting mechanism; 51. Screw; 52. First nut; 53. Second nut; 5231. Limiting hole; 6. Monitoring terminal. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] like Figures 1 to 8 As shown, in embodiment 1, a distributed fault monitoring device for a power transmission line with a positioning structure comprises a mounting plate 1, a mounting box 2, a connecting mechanism 4, an adjusting mechanism 5 and a monitoring terminal 6, wherein a plurality of mounting plates 1 are provided and are arranged at intervals between two adjacent substations, and the monitoring terminal 6 is arranged inside the mounting box 2, and a line groove 2121 for the transmission line to pass through is penetrated in the middle of the mounting box 2 along its moving direction;

[0033] The connecting mechanism 4 is fixedly connected to the side wall of the installation box 2, and a through hole 4121 is penetrated by the connecting mechanism 4 along the moving direction of the installation box 2; the adjusting mechanism 5 includes a screw rod 51, a first nut 52 and a second nut 53, and the two ends of the screw rod 51 are respectively fixedly connected to two adjacent mounting plates 1, and the connecting mechanism 4 is movably sleeved on the screw rod 51 through the through hole 4121, and the first nut 52 and the second nut 53 are both threadedly sleeved on the screw rod 51, and are respectively located on both sides of the connecting structure 4.

[0034] During use, an installation box 2 is arranged between every two adjacent installation plates 1, and the arrival time of the initial traveling wave generated by the fault point is monitored by the monitoring terminal 6 in the two adjacent installation boxes 2, which is conducive to the judgment of the position of the fault point; when adjusting the position of the device, there is no need to disassemble and reinstall the monitoring device, and only the position of the first nut 52 and the second nut 53 needs to be rotated and adjusted to achieve the position adjustment of the connecting mechanism 4 and the installation box 2, thereby avoiding the risk of damage to the monitoring device or falling of parts due to disassembly. The installation method is convenient and the use efficiency of the monitoring device is improved.

[0035] Embodiment 2: This embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:

[0036] The mounting box 2 comprises an upper shell 21 and a lower shell 22. One side of the upper shell 21 and the lower shell 22 are hinged, and the other side is detachably connected by bolts. The opposite surfaces of the upper shell 21 and the lower shell 22 are respectively provided with first semi-arc grooves, and a wire groove 2121 is formed between the two first semi-arc grooves.

[0037] The transmission line can be placed in the wire groove 2121 by opening the upper shell 21 and the lower shell 22, and then the upper shell 21 and the lower shell 22 are closed and fixed by bolts, which is more convenient for installation and removal. In a specific implementation, the connecting mechanism 4 is connected to the side wall of the lower shell 22.

[0038] Embodiment 3, this embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:

[0039] The connecting mechanism 4 includes a fixing block 41, a connecting block 42 and a fixing bolt 43. The fixing block 41 is fixedly connected to the side wall of the installation box 2. The connecting block 42 is detachably connected to the fixing block 41 through the fixing bolt 43. The adjacent surfaces of the fixing block 41 and the connecting block 42 are both provided with matching second semi-arc grooves, and the two second semi-arc grooves form a through hole 4121.

[0040] The through hole 4121 between the fixed block 41 and the connecting block 42 is sleeved on the screw rod 51. When the position does not need to be adjusted, it can be locked by the first nut 52 and the second nut 53; it is convenient for installation and disassembly; in the specific implementation, the diameter of the screw rod 51 is smaller than the diameter of the circular hole, so that the installation box 2 can be adjusted and moved on the screw rod 51 more smoothly.

[0041] Embodiment 4: This embodiment is a further improvement on the basis of embodiment 3, and its details are as follows:

[0042] It also includes two sets of limiting mechanisms 3, which are respectively arranged on both sides of the connecting mechanism 4. The limiting mechanism 3 includes a fixing plate 31, a tensioning spring 32, a supporting plate 33 and a limiting rod 34. The peripheral walls of the first nut 52 and the second nut 53 are respectively provided with limiting holes 5231 at equal intervals.

[0043] The fixing plate 32 is fixedly connected to the side wall of the installation box 2, the support plate 35 is connected to the fixing plate 32 through the tensioning spring 32, one end of the limiting rod 36 is connected to the side of the supporting plate 35 away from the fixing plate 31, and the other end of the limiting rod 36 is movably inserted into the limiting hole 31.

[0044] The limiting rod 34 is inserted into the limiting hole 5231 under the action of the support plate 33. Under the action of the tensioning spring 32, the limiting rod 34 can be prevented from moving out, and the position of the first nut 52 and the second nut 53 can also be strengthened, so that the monitoring terminal 6 can stably monitor the transmission line in real time.

[0045] Embodiment 5, this embodiment is a further improvement on the basis of embodiment 4, and its details are as follows:

[0046] The limiting mechanism 3 further includes a telescopic rod 35, the fixed end of which is fixedly connected to the fixed plate 31, and the movable end of which is fixedly connected to the support plate 33. Due to the linear telescopic characteristics of the telescopic rod 35, the support plate 33 can drive the limiting rod 36 to move linearly stably, making it easier to insert into the limiting hole 5231.

[0047] Embodiment 6: This embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:

[0048] Both ends of the wire trough are sealed and connected to the power transmission line through an annular sealing pad, which can well seal the inside of the installation box 2 to prevent water ingress and moisture.

[0049] Embodiment 7, a distributed monitoring method for a power transmission line, using a distributed fault monitoring device for a power transmission line as in any one of embodiments 1 to 6, comprises the following steps:

[0050] Step S01: installing a mounting box 2 between every two adjacent mounting plates 1;

[0051] Step S02: adjusting the distance between two adjacent installation boxes 2, and using the distance as the fault monitoring distance of the power transmission line;

[0052] Step S03: Real-time monitoring of the transmission line is performed through the monitoring terminals 6 in the two installation boxes 2, respectively, and the time when the initial traveling wave generated by the fault point reaches the two monitoring terminals 6 respectively;

[0053] Step S04: Based on the fault monitoring distance and the time when the initial traveling wave reaches the two monitoring terminals 6 , the distance from the fault point to the two monitoring terminals 6 is calculated.

[0054] like Figure 8 As shown in the figure, the initial traveling wave generated by the fault point C is transmitted along the transmission line to the substations at both ends at a speed of V, and the time when it arrives at the M and N ends on both sides is t M ,t N , then the distance calculation formulas from the fault point to the monitoring points at both ends are:

[0055] L M =(L+V·(t M -t N )) / 2,

[0056] L N =(LV·(t M -t N )) / 2,

[0057] In the above formula, L M , L N is the distance between the fault point and points M and N.

[0058] The present invention monitors the arrival time of the initial traveling wave generated by the fault point through the monitoring terminals 6 in the two installation boxes 2, which is beneficial to the judgment of the position of the fault point.

[0059] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A distributed fault monitoring device for a power transmission line with a positioning structure, characterized in that: It comprises a mounting plate (1), a mounting box (2), a connecting mechanism (4), an adjusting mechanism (5) and a monitoring terminal (6); the mounting plate (1) is provided in plurality and is arranged at intervals between two adjacent substations; the monitoring terminal (6) is arranged inside the mounting box (2); and a line groove (2121) for the transmission line to pass through is penetrated in the middle of the mounting box (2) along its moving direction; The connecting mechanism (4) is fixedly connected to the side wall of the installation box (2), and the connecting mechanism (4) is provided with a through hole (4121) extending along the moving direction of the installation box (2); the adjusting mechanism (5) comprises a screw rod (51), a first nut (52) and a second nut (53), the two ends of the screw rod (51) are respectively fixedly connected to two adjacent installation plates (1), the connecting mechanism (4) is movably sleeved on the screw rod (51) through the through hole (4121), and the first nut (52) and the second nut (53) are both threadedly sleeved on the screw rod (51), and are respectively located on both sides of the connecting structure (4).

2. A distributed fault monitoring device for power transmission lines with a positioning structure according to claim 1, characterized in that: The installation box (2) comprises an upper shell (21) and a lower shell (22); one side of the upper shell (21) and the lower shell (22) are hinged, and the other side is detachably connected by bolts; the opposing surfaces of the upper shell (21) and the lower shell (22) are respectively provided with first semi-arc grooves, and the wire passing groove (2121) is formed between the two first semi-arc grooves.

3. A distributed fault monitoring device for power transmission lines with a positioning structure according to claim 1, characterized in that: The connecting mechanism (4) comprises a fixing block (41), a connecting block (42) and a fixing bolt (43); the fixing block (41) is fixedly connected to the side wall of the installation box (2); the connecting block (42) is detachably connected to the fixing block (41) via the fixing bolt (43); adjacent surfaces of the fixing block (41) and the connecting block (42) are both provided with matching second semi-arc grooves, and the two second semi-arc grooves form the through hole (4121).

4. A distributed fault monitoring device for power transmission lines with a positioning structure according to claim 3, characterized in that: It also includes two groups of limiting mechanisms (3), which are respectively arranged on both sides of the connecting mechanism (4), the limiting mechanism (3) comprising a fixing plate (31), a tensioning spring (32), a supporting plate (33) and a limiting rod (34), and the peripheral walls of the first nut (52) and the second nut (53) are respectively provided with limiting holes (5231) at equal intervals; The fixing plate (32) is fixedly connected to the side wall of the installation box (2), the support plate (35) is connected to the fixing plate (32) via the tensioning spring (32), one end of the limiting rod (36) is connected to a side of the supporting plate (35) away from the fixing plate (31), and the other end of the limiting rod (36) is movably inserted into the limiting hole (31).

5. A distributed fault monitoring device for power transmission lines with a positioning structure according to claim 4, characterized in that: The limiting mechanism (3) further comprises a telescopic rod (35), the fixed end of the telescopic rod (35) being fixedly connected to the fixed plate (31), and the movable end of the telescopic rod (35) being fixedly connected to the support plate (33).

6. A distributed fault monitoring device for power transmission lines with a positioning structure according to claim 1, characterized in that: Both ends of the wire groove (2121) are sealed and connected to the power transmission line via annular sealing gaskets.

7. A distributed monitoring method for a power transmission line, using the distributed fault monitoring device for a power transmission line as claimed in any one of claims 1 to 6, characterized in that: The steps include: Step S01: The installation box (2) is installed between every two adjacent installation plates (1); Step S02: adjusting the distance between two adjacent installation boxes (2), and using the distance as a fault monitoring distance of the power transmission line; Step S03: Real-time monitoring of the transmission line is performed through the monitoring terminals (6) in the two installation boxes (2), respectively, and the time when the initial traveling wave generated by the fault point reaches the two monitoring terminals (6) respectively; Step S04: Based on the fault monitoring distance and the time when the initial traveling wave reaches the two monitoring terminals (6), the distance from the fault point to the two monitoring terminals (6) is calculated.

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