Line loss monitoring and positioning system for power transmission line

Abstract

The invention discloses a line loss monitoring and positioning system for a power transmission line, and the system comprises a monitoring end disposed on a cable and a handheld end disposed at an operation and maintenance worker, the monitoring end comprises a housing, a walking mechanism, a detection mechanism, and a data collection module, a sub-control module and a data transmission module which are respectively connected with the walking mechanism and the detection mechanism; the handheld end comprises a protective shell and a control system arranged in the protective shell, and the control system comprises a main control module, a data receiving module, a data processing module, a display screen module, a positioning alarm module and an operation key module; the cable surface damage condition is detected and positioned, abnormal points can be found quickly, the line loss rate and the fault risk are effectively reduced, and the cable surface damage detection device is convenient and labor-saving to use.

Description

Technical Field

[0001] The invention belongs to the technical field of line loss monitoring and positioning, and in particular relates to a line loss monitoring and positioning system for a power transmission line. Background Art

[0002] Line loss refers to the energy loss in the form of heat energy generated when electric current is transmitted through a conductor, which in turn leads to electric energy loss on the transmission line. Line loss is usually used to assess the economic efficiency of power system operation, and can indirectly reflect the technical conditions and management level of power supply. The line loss rate is an important indicator for detecting the performance of power transmission. The level of line loss rate directly represents the development level of the power grid. Therefore, it is very important to reduce the line loss rate of the distribution network.

[0003] Among them, the causes of line loss mainly include line insulation aging, metering failures and user electricity theft, that is, line loss is mostly caused by the transmission part and the metering part. In the prior art, the monitoring and prevention of line loss are mostly targeted at the metering part, and the metering part focuses on preventing reasons such as user electricity theft. As for the transmission part, after long-term use, the line will age, bulge, and the insulation layer will be damaged, which may cause poor insulation of the line and cause line leakage, thereby causing increased line loss. Since this loss is in the period before causing a fault, it is not easy to be found and is easily ignored.

[0004] Therefore, in order to solve the above problems, it is necessary to develop a line loss monitoring and positioning system for transmission lines. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a line loss monitoring and positioning system for a transmission line, which can detect and locate the surface damage of the cable, facilitate rapid discovery of abnormal points, effectively reduce the line loss rate and fault risk, and is convenient and labor-saving to use.

[0006] The object of the present invention is achieved in this way: a line loss monitoring and positioning system for a power transmission line includes a monitoring terminal arranged on a cable and a handheld terminal arranged at a maintenance personnel.

[0007] Among them, the monitoring end includes a shell with an opening on one side, and a walking mechanism and a detection mechanism arranged in sequence inside the shell along the cable laying direction, as well as a data acquisition module connected to the walking mechanism and the detection mechanism respectively, and a sub-control module connected to the data acquisition module, and a data transmission module connected to the sub-control module.

[0008] The walking mechanism includes a main walking wheel device, a secondary walking wheel device and a distance measuring device. The main walking wheel device and the secondary walking wheel device are respectively arranged above and below the cable to jointly form an upper and lower clamping of the cable. The main walking wheel device includes a driving wheel rotatably arranged inside an outer shell, and a driving motor connected to the driving wheel and driving the driving wheel to rotate. The secondary walking wheel device includes an adjusting device and a driven wheel rotatably arranged on the adjusting device. The distance measuring device includes a displacement sensor assembly arranged at the wheel axle of the driving wheel or the driven wheel.

[0009] The detection mechanism comprises an upper clamping seat and a lower clamping seat arranged above and below the cable inside the shell, and the upper clamping seat and the lower clamping seat are respectively arranged in an inverted concave shape and a positive concave shape structure. The upper clamping seat and the lower clamping seat are respectively provided with a horizontal movable plate on one side, and a threaded hole is opened on the movable plate, and the movable plate is connected to a vertical bidirectional screw arranged inside the rotatable shell through the threaded hole, and the bottom end of the bidirectional screw is connected to a rotating motor. The upper clamping seat and the lower clamping seat are respectively fixed with an arc support plate that matches the cable surface, and at least one arc clamping plate is arranged on the side of the arc support plate close to the cable, and a connecting rod is fixedly arranged on the side of the arc clamping plate away from the cable, and the other end of the connecting rod passes through the arc support plate and is connected to a pressure sensor assembly, and a supporting spring is also sleeved on the part of the connecting rod located between the arc support plate and the arc clamping plate, and the two ends of the supporting spring are respectively fixedly connected to the arc support plate and the arc clamping plate, and an auxiliary sliding device is also arranged on the side of the arc clamping plate close to the cable.

[0010] The handheld terminal includes a protective shell, and a control system arranged in the protective shell, the control system includes a main control module, a data receiving module, a data processing module, a display screen module, a positioning alarm module and an operation button module, the data receiving module is connected to the data transmission module and transmits the received data to the main control module, the main control module processes the data through the data processing module to form detection result data corresponding to the walking distance data and the sensing pressure data, and displays it through the display screen module, when the data is detected to be abnormal, an alarm is issued through the positioning alarm module and a positioning mark is located at the abnormal point in the detection result data, and the operation button module is used for operation and maintenance personnel to operate.

[0011] Furthermore, the adjusting device includes a vertical plate for supporting the driven wheel, and a horizontal plate is arranged on the outer end surface of the vertical plate. A through hole is opened on the horizontal plate and is mounted on the vertical limit rod through the through hole. The top and bottom ends of the limit rod are respectively fixedly connected to the inner wall of the outer shell through fixed plates. A return spring is also mounted on the limit rod below the horizontal plate. The top and bottom ends of the return spring are respectively fixedly connected to the bottom end of the horizontal plate and the top end of the fixed plate below. An electromagnet assembly is also arranged between the horizontal plate and the fixed plate above.

[0012] Furthermore, the displacement sensor assembly adopts an encoder assembly, specifically a magnetic encoder or a photoelectric encoder assembly.

[0013] Furthermore, the driving motor and the rotating motor are respectively forward and reverse motors.

[0014] Furthermore, there are two arc-shaped clamping plates arranged on the inner side of the arc-shaped support plate on the upper clamping seat and the lower clamping seat respectively, and the four arc-shaped clamping plates together form an annular surrounding structure for the cable.

[0015] Furthermore, the pressure sensor assembly adopts a piezoelectric diaphragm pressure sensor assembly.

[0016] Furthermore, the auxiliary sliding device includes a plurality of balls which are embedded on a side of the arc-shaped clamping plate close to the cable and can rotate 360 ​​degrees.

[0017] Furthermore, the detection result data is presented in a two-dimensional plane graph with the horizontal axis being the walking distance data and the vertical axis being the sensing pressure data, and is displayed through a display screen module.

[0018] Due to the adoption of the above technical solution, the beneficial effects of the present invention are: (1) By setting up the entire device with a separate monitoring terminal on the cable and a handheld terminal at the operator's disposal, the operator can control the monitoring terminal and receive monitoring terminal data through the handheld terminal, automatically analyze and process the data, and intuitively display the results, which can effectively reduce the labor intensity of the staff; (2) By setting up a walking mechanism, the entire device can quickly walk and detect along the cable line, without the need for manual detection along the line, effectively improving work efficiency and saving manpower and material resources; (3) By providing a detection mechanism, the arc-shaped clamping plates in the detection mechanism jointly form a ring-shaped enclosing structure for the cable, and during the detection process, the arc-shaped clamping plates are tightly connected to the surface of the cable. When the arc-shaped clamping plates follow the walking mechanism to move forward along the cable, the convex, concave and cracked parts of the cable in different states will apply different pressures to the pressure sensor assembly through the arc-shaped clamping plates and the connecting rod. By collecting and analyzing the pressure data, the surface condition of the cable can be obtained, and abnormal conditions on the cable surface can be quickly discovered; (4) By installing a distance measuring device, the walking distance data of the entire monitoring end can be monitored and collected, and the walking distance data can be combined and analyzed with the pressure sensing data obtained during the walking process, so as to quickly locate the surface condition of the cable and assist the operation and maintenance personnel to quickly identify the normal and abnormal sections of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the walking mechanism structure of the monitoring end in the present invention.

[0020] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of part C in the middle.

[0021] Figure 3 It is a schematic diagram of the structure of the detection mechanism of the monitoring end in the present invention.

[0022] Figure 4 yes Figure 3 The enlarged structural diagram of part D in the middle.

[0023] Figure 5 It is a structural schematic diagram of the handheld terminal in the present invention.

[0024] Figure 6 It is a principle block diagram of the present invention.

[0025] In the figure: 0, cable; A. Monitoring terminal; 1. Shell 1a, opening; 2. Traveling mechanism 21, main traveling wheel device 21a, driving wheel 21b, driving motor 22, auxiliary traveling wheel device 22a, adjusting device 22b, driven wheel 23, distance measuring device 23a, displacement sensor assembly; 22a1, vertical plate 22a2, horizontal plate 22a3, limit rod 22a4, fixed plate 22a5, return spring 22a6, electromagnet assembly; 3. Detection mechanism 31, upper clamping seat 32, lower clamping seat 33, moving plate 34, bidirectional screw 35, rotating motor 36, arc support plate 37, arc clamping plate 38, connecting rod 39, pressure sensor assembly 310, supporting spring 311, auxiliary sliding device; B. Handheld terminal; 4. Protective shell 5. Control system; a. Data acquisition module b. Sub-control module c. Data transmission module d. Main control module e. Data receiving module f. Data processing module g. Display screen module h. Positioning alarm module i. Operation button module DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, a line loss monitoring and positioning system for a power transmission line includes a monitoring terminal A arranged on a cable and a handheld terminal B arranged at a maintenance personnel.

[0028] Among them, the monitoring end A includes a shell 1 with an opening 1a on one side, and a walking mechanism 2 and a detection mechanism 3 arranged in sequence inside the shell 1 along the cable laying direction, as well as a data acquisition module a connected to the walking mechanism 2 and the detection mechanism 3 respectively, and a sub-control module b connected to the data acquisition module a, and a data transmission module c connected to the sub-control module b.

[0029] The walking mechanism 2 includes a main walking wheel device 21 , a secondary walking wheel device 22 and a distance measuring device 23 .

[0030] Specifically, the main walking wheel device 21 and the auxiliary walking wheel device 22 are respectively arranged above and below the cable to jointly form an upper and lower clamping of the cable. The main walking wheel device 21 includes a driving wheel 21a rotatably arranged inside the outer shell 1, and a driving motor 21b connected to the driving wheel 21a and driving the driving wheel 21a to rotate. Preferably, the driving motor 21b can adopt a forward and reverse motor. The auxiliary walking wheel device 22 includes an adjusting device 22a, and a driven wheel 22b rotatably arranged on the adjusting device 22a. By setting the adjusting device 22a, the position of the driven wheel 22b can be adjusted up and down, which is convenient for clamping the cable and can also achieve stable clamping of the cable, which is convenient, labor-saving and stable.

[0031] Specifically, the adjusting device 22a includes a vertical plate 22a1 for supporting the driven wheel 22b, the outer end surface of the vertical plate 22a1 is provided with a horizontal plate 22a2, the horizontal plate 22a2 is provided with a through hole and is sleeved on the vertical limit rod 22a3 through the through hole, the top and bottom ends of the limit rod 22a3 are respectively fixedly connected to the inner wall of the shell 1 through the fixed plate 22a4, and the limit rod 22a3 is also sleeved with a return spring 22a5 below the horizontal plate 22a2, the top and bottom ends of the return spring 22a5 are respectively fixedly connected to the bottom end of the horizontal plate 22a2 and the top of the fixed plate 22a4 below, and an electromagnet assembly 22a6 is also provided between the horizontal plate 22a2 and the upper fixed plate 22a4; in specific implementation, when the electromagnet assembly 22a6 is in a power-off and non-adsorbed state, the horizontal plate 22 a2 can slide up and down on the limit rod 22a3 under the elastic action of the return spring 22a5. At this time, the driven wheel 22b can move up and down through the vertical plate 22a1 following the horizontal plate 22a2, so as to adjust the size of the space for clamping the cable between the active wheel 21a and the driven wheel 22b, so as to facilitate the clamping and placement on the cable or removal from the cable. When the device is placed on the cable and needs to be worked and walked, the electromagnet assembly 22a6 is energized to adsorb the horizontal plate 22a2 and move upward, and at the same time drive the vertical plate 22a1 and the driven wheel 22b to move upward, so that the driven wheel 22b is tightly connected to the surface of the cable, and under the action of the electromagnetic adsorption force of the electromagnet assembly 22a6, it is possible to maintain a tight connection with the cable, so that the active wheel 21a and the driven wheel 22b jointly keep the cable clamped until the walking work is completed.

[0032] Specifically, the distance measuring device 23 includes a displacement sensor assembly 23a arranged at the axle of the driving wheel 21a or the driven wheel 22b; preferably, the displacement sensor assembly 23a adopts an encoder assembly, specifically a magnetic encoder or a photoelectric encoder assembly.

[0033] Wherein, the detection mechanism 3 includes an upper clamping seat 31 and a lower clamping seat 32 arranged above and below the cable inside the shell 1, and the upper clamping seat 31 and the lower clamping seat 32 are respectively arranged in an inverted concave shape and a positive concave shape. A horizontal movable plate 33 is respectively arranged on one side of the upper clamping seat 31 and the lower clamping seat 32, and a threaded hole is opened on the movable plate 33. The movable plate 33 is connected to a vertical bidirectional screw 34 arranged inside the rotatable shell 1 through the threaded hole. The bottom end of the bidirectional screw 34 is connected to a rotating motor 35. Preferably, the rotating motor 35 adopts a forward and reverse motor. The upper clamping seat 31 and the lower clamping seat 32 are respectively fixed with an arc-shaped support plate 36 that matches the surface of the cable, and at least one arc-shaped clamping plate 37 is arranged on the side of the arc-shaped support plate 36 close to the cable. A connecting rod 38 is fixedly provided on the side of the clamping plate 37 away from the cable, and the other end of the connecting rod 38 passes through the arc support plate 36 and is connected to a pressure sensor assembly 39. Preferably, the pressure sensor assembly 39 can adopt a piezoelectric diaphragm pressure sensor assembly. A support spring 310 is also sleeved on the part of the connecting rod 38 located between the arc support plate 36 and the arc clamping plate 37. The two ends of the support spring 310 are respectively fixedly connected to the arc support plate 36 and the arc clamping plate 37. An auxiliary sliding device 311 is also provided on the side surface of the arc clamping plate 37 close to the cable. Specifically, the auxiliary sliding device 311 includes a plurality of 360-degree rotatable balls embedded in the side of the arc clamping plate 37 close to the cable, so as to reduce the friction between the arc clamping plate 37 and the cable surface and avoid secondary damage to the cable surface.

[0034] Preferably, there are two arc-shaped clamping plates 37 arranged on the inner side of the arc-shaped support plate 36 on the upper clamping seat 31 and the lower clamping seat 32 respectively, and the four arc-shaped clamping plates 37 together form an annular surrounding structure for the cable.

[0035] During the specific implementation, the rotating motor 35 is started to drive the bidirectional screw 34 to rotate. During the rotation process, the bidirectional screw 34 drives the moving plate 33 set thereon through the thread to drive the upper clamping seat 31 and the lower clamping seat 32 to move in the direction close to the cable at the same time until the arc clamping plate 37 is tightly connected with the cable surface. When the detection mechanism 3 follows the walking mechanism 2 along the cable, the protrusions, depressions and cracks on the cable will apply different pressures to the pressure sensor assembly 39 through the arc clamping plate 37 and the connecting rod 38. The surface condition of the cable can be obtained by collecting and analyzing the pressure data, and then the abnormal condition of the cable surface can be quickly discovered. After use, the rotating motor 35 is started again to drive the bidirectional screw 34 to rotate in the opposite direction, driving the upper clamping seat 31 and the lower clamping seat 32 to move in the direction away from the cable at the same time, so as to loosen the cable.

[0036] Among them, the handheld terminal B includes a protective shell 4, and a control system 5 arranged in the protective shell 4, the control system 5 includes a main control module d, a data receiving module e, a data processing module f, a display screen module g, a positioning alarm module h and an operation button module i, the data receiving module e is connected to the data transmission module c and transmits the received data to the main control module d, the main control module d processes the data through the data processing module f to form detection result data corresponding to the walking distance data and the sensing pressure data. Specifically, the detection result data is displayed in a two-dimensional plane graph with the horizontal axis as the walking distance data and the vertical axis as the sensing pressure data, and is displayed through the display screen module g. When the data is abnormal, an alarm is issued through the positioning alarm module h and a positioning mark is located at the abnormal point in the detection result data graph. The operation button module i is used for operation and maintenance personnel to operate.

[0037] It should be noted that the monitoring terminal A and the handheld terminal B also include a driving power supply for supplying power to the walking mechanism 2 and the detection mechanism 3 of the monitoring terminal A and the control system 5 of the handheld terminal B. It should also be noted that based on the application method and application environment, the data transmission module c and the data receiving module e should adopt a wireless communication transmission device, which is common knowledge for those skilled in the art and can be implemented through a variety of implementation methods. In this application, it is only required to realize the functions described in this application, and no other special requirements are made, so no specific limitations are made here.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the specific implementation modes of the present invention can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A line loss monitoring and positioning system for a power transmission line, characterized in that: It includes a monitoring terminal (A) installed on the cable and a handheld terminal (B) installed at the operation and maintenance personnel; The monitoring end (A) comprises a housing (1) having an opening (1a) on one side, a walking mechanism (2) and a detection mechanism (3) arranged in sequence inside the housing (1) along the cable laying direction, a data acquisition module (a) connected to the walking mechanism (2) and the detection mechanism (3) respectively, a sub-control module (b) connected to the data acquisition module (a), and a data transmission module (c) connected to the sub-control module (b); The walking mechanism (2) comprises a main walking wheel device (21), a secondary walking wheel device (22) and a distance measuring device (23); the main walking wheel device (21) and the secondary walking wheel device (22) are respectively arranged above and below the cable to form an upper and lower clamping of the cable; the main walking wheel device (21) comprises a driving wheel (21a) rotatably arranged inside the housing (1), and a driving motor (21b) connected to the driving wheel (21a) and driving the driving wheel (21a) to rotate; the secondary walking wheel device (22) comprises an adjusting device (22a) and a driven wheel (22b) rotatably arranged on the adjusting device (22a); and the distance measuring device (23) comprises a displacement sensor assembly (23a) arranged at the wheel axle of the driving wheel (21a) or the driven wheel (22b); The detection mechanism (3) comprises an upper clamping seat (31) and a lower clamping seat (32) which are arranged above and below the cable inside the housing (1); the upper clamping seat (31) and the lower clamping seat (32) are arranged in an inverted concave shape and a positive concave shape respectively; a horizontal movable plate (33) is arranged on one side of the upper clamping seat (31) and the lower clamping seat (32); a threaded hole is opened on the movable plate (33); the movable plate (33) is connected to a vertical bidirectional screw (34) arranged inside the rotatable housing (1) through the threaded hole; the bottom end of the bidirectional screw (34) is connected to a rotating motor (35); An arc-shaped support plate (36) adapted to the surface of the cable is fixedly arranged in the upper clamping seat (31) and the lower clamping seat (32), respectively; at least one arc-shaped clamping plate (37) is arranged in the side of the arc-shaped support plate (36) close to the cable; a connecting rod (38) is fixedly arranged on the side of the arc-shaped clamping plate (37) away from the cable; the other end of the connecting rod (38) passes through the arc-shaped support plate (36) and is connected to a pressure sensor assembly (39); a supporting spring (310) is sleeved on the portion of the connecting rod (38) located between the arc-shaped support plate (36) and the arc-shaped clamping plate (37); two ends of the supporting spring (310) are fixedly connected to the arc-shaped support plate (36) and the arc-shaped clamping plate (37), respectively; an auxiliary sliding device (311) is also arranged on the side of the arc-shaped clamping plate (37) close to the cable; The handheld terminal (B) comprises a protective shell (4), and a control system (5) arranged in the protective shell (4); the control system (5) comprises a main control module (d), a data receiving module (e), a data processing module (f), a display screen module (g), a positioning alarm module (h) and an operation button module (i); the data receiving module (e) is connected to the data transmission module (c) and transmits the received data to the main control module (d); the main control module (d) processes the data through the data processing module (f) to form detection result data corresponding to the walking distance data and the sensing pressure data, and displays the data through the display screen module (g); when the data is abnormal, an alarm is issued through the positioning alarm module (h) and a positioning mark is placed at the abnormal point in the detection result data; the operation button module (i) is used for operation and maintenance personnel to operate.

2. A line loss monitoring and positioning system for a power transmission line according to claim 1, characterized in that: The adjusting device (22a) comprises a vertical plate (22a1) for supporting a driven wheel (22b); a horizontal plate (22a2) is arranged on the outer end surface of the vertical plate (22a1); a through hole is opened on the horizontal plate (22a2) and is sleeved on a vertical limit rod (22a3) through the through hole; the top and bottom ends of the limit rod (22a3) are respectively fixedly connected to the inner wall of the housing (1) through a fixed plate (22a4); a return spring (22a5) is sleeved on the limit rod (22a3) below the horizontal plate (22a2); the top and bottom ends of the return spring (22a5) are respectively fixedly connected to the bottom end of the horizontal plate (22a2) and the top end of the fixed plate (22a4) below; an electromagnet assembly (22a6) is also arranged between the horizontal plate (22a2) and the fixed plate (22a4) above.

3. A line loss monitoring and positioning system for a power transmission line according to claim 1, characterized in that: The displacement sensor component (23a) adopts an encoder component, specifically a magnetic encoder component or a photoelectric encoder component.

4. A line loss monitoring and positioning system for a power transmission line according to claim 1, characterized in that: The driving motor (21b) and the rotating motor (35) are respectively forward and reverse motors.

5. A line loss monitoring and positioning system for a power transmission line according to claim 1, characterized in that: There are two arc-shaped clamping plates (37) arranged on the inner side of the arc-shaped support plate (36) on the upper clamping seat (31) and the lower clamping seat (32) respectively, and the four arc-shaped clamping plates (37) together form an annular structure surrounding the cable.

6. A line loss monitoring and positioning system for a power transmission line according to claim 1, characterized in that: The pressure sensor assembly (39) adopts a piezoelectric diaphragm pressure sensor assembly.

7. A line loss monitoring and positioning system for a power transmission line according to claim 1, characterized in that: The auxiliary sliding device (311) comprises a plurality of balls which are embedded on a side of the arc-shaped clamping plate (37) close to the cable and can rotate 360 ​​degrees.

8. A line loss monitoring and positioning system for a power transmission line according to claim 1, characterized in that: The detection result data is displayed in a two-dimensional plane graph with the horizontal axis representing the walking distance data and the vertical axis representing the sensing pressure data, and is displayed through the display screen module (g).

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