Power transmission line split type cable fault positioning device

Abstract

The utility model relates to a split-type cable fault positioning device for a power transmission line. The split-type cable fault positioning device comprises a host body, and a broadband current sensor, a power-taking iron core and a voltage induction pole plate which are electrically connected with the host body respectively, the voltage induction polar plate is fixedly arranged at the top of the host body and is connected to the host body through a signal line; the electricity taking iron core is connected into the host body through a wire, and the broadband current sensor is connected into the host body through a signal line. The power taking iron core supplies power to the host body in a coupling energy taking mode, and a split type design is adopted, so that the flexibility of device installation is improved, and a guarantee is provided for sustainable operation of the device; the broadband current sensor adopts a split type design, so that the device is more suitable for a complex cable terminal mounting scene; the voltage induction pole plate is used for inducting the voltage of a line above the host body, the host body is installed under a power transmission cable and inducts the voltage of a cable terminal of a corresponding phase, and therefore the operation condition of the line is judged.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power devices, in particular to a split-type cable fault locating device for a power transmission line. Background Art

[0002] With the rapid development of social economy, the demand for electricity in various industries has shown a rapid growth trend, which has led to the increase in the scale of the power cable industry year by year, and the proportion of cables used in power grid transmission and distribution construction has also increased year by year. Power cables are mostly laid underground, and some scenes in buildings are laid in the form of overhead pipelines. Their wide application provides a stable power supply for our production and life.

[0003] Compared with bare conductors, power cables are safer and more reliable, but they also have the disadvantages of being difficult to repair and difficult to detect faults in time. As a key component of the power grid, power cable failures will lead to serious consequences, such as interrupting the normal power supply of users, forcing large factories and enterprises to suspend production, and causing a large number of products to be scrapped. If the power cable failure is not discovered in time, the large amount of heat generated during the failure will damage the insulation layer and even cause a fire, causing economic losses and casualties.

[0004] With the large number of cable lines used in power transmission lines, cables occasionally fail due to external force damage or poor cable joint technology. The inspection and repair of cable faults are more difficult than those of overhead lines, and the power supply recovery speed is also lower. In order to solve the problem of cable fault location, an offline fault detector is generally used to inject a traveling wave at the cable port. The location of the fault point can be determined by the reflection wave time. However, this method requires the cable terminal to be untied, and the offline operation efficiency is low. Due to the complex structure of the cable terminal head and the presence of obstructions such as the cable terminal head platform, traditional offline fault detectors are difficult to adapt to most complex cable terminal head installation environments, resulting in poor actual fault diagnosis results, affecting cable fault location and line inspection. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a split-type cable fault locating device for a power transmission line to overcome the deficiencies in the above-mentioned prior art.

[0006] The utility model solves the above-mentioned technical problem with the following technical solution: a split-type cable fault locating device for a power transmission line, comprising a main body, and a broadband current sensor, a power-taking iron core and a voltage sensing plate electrically connected to the main body respectively; the voltage sensing plate is fixedly arranged on the top of the main body and connected to the main body through a signal line; the power-taking iron core is connected to the main body through a wire, and the broadband current sensor is connected to the main body through a signal line.

[0007] The beneficial effects of the present utility model are as follows: The power-taking iron core supplies power to the main body of the host through the method of coupled energy harvesting. It adopts a split design, which improves the flexibility of device installation and provides guarantee for the sustainable operation of the device; The broadband current sensor collects power frequency current and high-frequency current. The broadband current sensor has a relatively wide frequency band and can effectively collect signals in the range of 50 Hz to 500 kHz. This frequency band has covered the power frequency and most traveling wave signals, and can achieve accurate measurement of the required current signals. The broadband current sensor adopts a split design, making the device suitable for complex cable terminal head installation scenarios; The voltage induction plate is used to sense the line voltage above the main body of the host. The main body of the host is installed directly below the power transmission cable to sense the voltage of the corresponding phase cable terminal head, thereby judging the operation condition of the line.

[0008] Based on the above technical solutions, the present utility model can be further improved as follows.

[0009] Further, it further includes a solar panel arranged on one side of the main body of the host; the solar panel is connected to the main body of the host through a wire.

[0010] Further, the solar panel is rotatably connected to one side of the main body of the host through a hinge.

[0011] Further, it further includes a fixing bracket. One end of the fixing bracket is rotatably connected to the side wall of the main body of the host, and a notch is provided below the other end. A positioning nail is provided on the side wall of the solar panel, and the fixing bracket is detachably buckled on the positioning nail through the notch.

[0012] Further, it further includes a Beidou and 4G integrated antenna module arranged on the main body of the host; the Beidou and 4G integrated antenna module is electrically connected to the controller inside the main body of the host, and the Beidou and 4G integrated antenna module is wirelessly connected to the terminal remotely.

[0013] Further, the main body of the host includes a metal shell.

[0014] Further, a fixing crossbar is fixedly arranged on the back of the main body of the host. Description of the Drawings

[0015] Figure 1 is the structural schematic diagram of the present utility model Figure 1 ;

[0016] Figure 2 is the structural schematic diagram of the present utility model Figure 2 ;

[0017] Figure 3 is the structural schematic diagram of the present utility model Figure 3 。

[0018] In the drawings, the list of components represented by each reference numeral is as follows:

[0019] 1. Main body of the host; 2. Wide-band current sensor; 3. Power-taking iron core; 4. Voltage induction plate; 5. Signal wire; 6. Conducting wire; 7. Cabinet door; 8. Solar panel; 9. Hinge; 10. Fixed bracket; 101. Notch; 11. Positioning nail; 12. Beidou and 4G integrated antenna module; 13. Fixed cross bar; 14. J-shaped structure. Specific implementation mode

[0020] The principles and features of the present utility model will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0021] As Figures 1-3 shown, in Embodiment 1, a split-type cable fault location device for a transmission line includes a main body of the host 1, a wide-band current sensor 2, a power-taking iron core 3, and a voltage induction plate 4 that are electrically connected to the main body of the host 1 respectively; the voltage induction plate 4 is fixedly arranged on the top of the main body of the host 1 and is connected to the main body of the host 1 through a signal wire 5; the power-taking iron core 3 is connected to the main body of the host 1 through a conducting wire 6, and the wide-band current sensor 2 is connected to the main body of the host 1 through a signal wire 5.

[0022] The power-taking iron core 3 supplies power to the main body of the host 1 through the method of coupled energy extraction. In specific implementation, a split-type design is adopted, which improves the flexibility of device installation and provides guarantee for the sustainable operation of the device;

[0023] The wide-band current sensor 2 collects power frequency current and high-frequency current. The wide-band current sensor 2 has a relatively wide frequency band and can effectively collect signals in the range of 50 Hz to 500 kHz. This frequency band has covered the power frequency and most traveling wave signals, and can realize the accurate measurement of the required current signal. In specific implementation, the wide-band current sensor 2 adopts a split-type design, making the device more suitable for complex cable terminal head installation scenarios;

[0024] The function of the voltage induction plate 4 is to sense the line voltage above the main body of the host 1. The main body of the host 1 is installed directly below the transmission cable to sense the voltage of the corresponding phase cable terminal head, so as to judge the operation condition of the line.

[0025] In specific implementation, the voltage induction plate 4 adopts a double-layer PCB board copper sheet for induction, and its induction signal enters the main body of the host 1 through the signal wire 5 below the voltage induction plate 4; the wide-band current sensor 2 adopts a signal wire 5 of copper shielded twisted pair, and the signal can be transmitted to the main body of the host 1 without interference; in addition, a cabinet door 7 is arranged on one side of the main body of the host 1. The function of the cabinet door 7 is to conveniently open the device and perform simple device debugging. At the same time, according to the specific network security requirements of the installation province, the corresponding directional intranet transmission IoT card can be conveniently replaced without disassembling the overall housing of the device.

[0026] Embodiment 2 is a further improvement based on Embodiment 1, and the specific content is as follows:

[0027] It further includes a solar panel 8 arranged on one side of the host body 1; the solar panel 8 is connected to the host body 1 through a wire 6. The function of the solar panel 8 is to supply power to the host body 1, and the power-taking iron core 3 can supply power to the host body 1 through coupled power-taking; the dual power supply design of combining the solar panel 8 and the power-taking iron core 3 greatly improves the power supply reliability and stability of the device, ensuring the long-term stable operation of the device.

[0028] Embodiment 3 is a further improvement based on Embodiment 2, and the specific content is as follows:

[0029] The solar panel 8 is rotatably connected to one side of the host body 1 through a hinge 9. Before installing the host body 1, the solar panel 8 is folded and stored, fitting the front end face of the host body 1, thereby reducing space occupation and facilitating transportation; after the host body 1 is installed, the solar panel 8 can be unfolded to improve the lighting efficiency; in specific implementation, the wire 6 of the solar panel 8 penetrates through the inside of the hinge 9 and then extends into the host body 1 to supply power to the battery inside the host body 1.

[0030] Embodiment 4 is a further improvement based on Embodiment 3, and the specific content is as follows:

[0031] It further includes a fixing bracket 10. One end of the fixing bracket 10 is rotatably connected to the side wall of the host body 1, and a notch 101 is provided below the other end. A positioning nail 11 is provided on the side wall of the solar panel 8, and the fixing bracket 10 is detachably buckled on the positioning nail 11 through the notch 101. The structure is simple, the cost is reduced, and it is easy to maintain.

[0032] Embodiment 5 is a further improvement based on Embodiment 1, and the specific content is as follows:

[0033] It further includes a Beidou and 4G integrated antenna module arranged on the host body 1; the Beidou and 4G integrated antenna module is electrically connected to the controller inside the host body 1, and the Beidou and 4G integrated antenna module is wirelessly connected to the terminal remotely. The Beidou and 4G integrated antenna module can receive and transmit data, as well as perform precise time synchronization; the power frequency voltage, power frequency current, traveling wave current and the status information of the device itself collected by the split-type cable fault location device for transmission lines can be sent to the central station for centralized analysis through this module, and it can also receive the debugging commands from the master station to modify the device parameters. The Beidou time synchronization module can achieve a time synchronization accuracy of 20 ns level, so as to achieve high-precision fault location between different devices.

[0034] Embodiment 6 is a further improvement based on Embodiment 1, and the specific content is as follows:

[0035] The main body 1 of the host includes a metal shell. Since the electrical environment near the cable terminal head is complex, the shell of the main body 1 of the host is designed with a full-metal shielding, and the shell of the main body 1 of the host is in good contact with the ground, effectively avoiding the interference of various external electromagnetic interferences and other high-frequency signals on signal acquisition.

[0036] Embodiment 7 is a further improvement based on Embodiment 1, and is specifically as follows:

[0037] A fixed cross bar 13 is fixedly arranged on the back of the main body 1 of the host. The function of the fixed cross bar 13 is to enhance the strength of the device installation and fixation; in specific implementation, a number of holes are arranged on the fixed cross bar 13, and the main body 1 of the host is fixed to the cross arm of the angle steel tower through the fixed cross bar 13, improving the load-bearing strength of the fixed bracket 10; during specific installation, the fixed cross bar 13 of the main body 1 of the host is firmly fixed to the cross arm of the angle steel tower through the J-shaped structure 14, wherein the groove of the J-shaped structure 14 is embedded into the cross arm of the angle steel tower, and then the cross arm of the angle steel tower is fixed through the fixed cross bar 13 to play a role in fastening connection.

[0038] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A split-type cable fault location device for a transmission line, characterized in that, It includes a host body (1), a broadband current sensor (2), a power-taking iron core (3), and a voltage induction plate (4) that are electrically connected to the host body (1) respectively; the voltage induction plate (4) is fixedly arranged on the top of the host body (1) and is connected to the host body (1) through a signal line (5); the power-taking iron core (3) is connected to the host body (1) through a wire (6), and the broadband current sensor (2) is connected to the host body (1) through a signal line (5).

2. The split - type cable fault location device for a transmission line according to claim 1, characterized in that, It further includes a solar panel (8) arranged on one side of the host body (1); the solar panel (8) is connected to the host body (1) through a wire (6).

3. The split cable fault location device for transmission lines according to claim 2, characterized in that, The solar panel (8) is rotatably connected to one side of the host body (1) through a hinge (9).

4. The split-type cable fault location device for a transmission line according to claim 3, wherein, It further includes a fixing bracket (10). One end of the fixing bracket (10) is rotatably connected to the side wall of the host body (1), and a notch (101) is arranged below the other end. A positioning nail (11) is arranged on the side wall of the solar panel (8), and the fixing bracket (10) is detachably buckled on the positioning nail (11) through the notch (101).

5. A split cable fault location device for a transmission line according to claim 1, characterized in that, It further includes a Beidou and 4G integrated antenna module arranged on the host body (1); the Beidou and 4G integrated antenna module is electrically connected to a controller in the host body (1), and the Beidou and 4G integrated antenna module is remotely wirelessly connected to a terminal.

6. The split-type cable fault location device for a transmission line according to claim 1, characterized in that, The host body (1) includes a metal shell.

7. A split-type cable fault location device for a transmission line according to claim 1, characterized in that, A fixing cross bar (13) is fixedly arranged on the back of the host body (1).

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