Wiring-free high-voltage cable fault detection device

Abstract

The utility model discloses a wiring-free high-voltage cable fault detection device, belongs to the technical field of wind power plant application, and solves the problems that in the prior art, a cable must be dug out during fault detection of the cable, and a fault point of a buried cable needs to be positioned in a segmented manner during fault detection. Comprising a power supply device, a signal transmitting device, a signal receiving device and a control device, according to the utility model, pulse detection is carried out on the cable through cooperation of the control device and the signal transmitting device. The fault detection device is remotely controlled to carry out monitoring work through the signal receiving device and radio signal transmission; the working precision of the fault detection device is improved by averagely arranging a plurality of groups of detection devices, so that the time and steps for fault detection are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind farm application, and in particular relates to a wiring-free high-voltage cable fault detection device. Background Art

[0002] A cable is a device for transmitting electric energy or signals. It is usually a rope-like cable formed by twisting several or several groups of wires (at least two wires in each group). Each group of wires is insulated from each other and are often twisted around a center wire. The entire outside is covered with a highly insulating covering. The cable has the characteristics of being powered inside and insulated outside. With the acceleration of urban cabling transformation, the scale of high-voltage cables in urban power grids has grown rapidly, and the probability of failure has continued to increase. During electrical installation and electrical maintenance, cable failures are often encountered. At this time, relevant instruments are needed to identify the fault point before repairs can be carried out according to the fault situation. Therefore, a cable fault detection device is needed.

[0003] With the vigorous development of new energy, wind farms mostly use underground cables for power collection lines. After the cables are installed, cable faults may occur, resulting in abnormal power supply. When a power cable fails, it is necessary to find the location of the fault from the buried power cable and handle it. Traditionally, excavation methods are usually used, and measurement equipment and detection lines are laid to locate the fault point of the buried cable in sections. The process is time-consuming and labor-intensive, and may even cause personal injury accidents. Utility Model Content

[0004] In view of the above-mentioned deficiencies existing in the prior art, the purpose of the utility model is to provide a high-voltage cable fault detection device which does not require digging out the cable for maintenance, has simple positioning and fewer manual operation steps.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A wiring-free high-voltage cable fault detection device comprises a cable, the cable is deeply buried underground, a fault detection device is sleeved and installed on the cable, the fault detection device comprises a power supply device, a signal transmitting device, a signal receiving device and a control device, the power supply device adopts a circular ring outer structure, the power supply device is sleeved and installed on the outer surface of the cable, and the control device is fixedly welded and installed on the top of the power supply device; the signal transmitting device and the signal receiving device are fixedly installed on the outer surface of the cable, the signal transmitting device and the signal receiving device are installed on the same horizontal line, and the opposite end faces of the signal transmitting device and the signal receiving device are arranged inside the cable.

[0007] As a further description of the above scheme:

[0008] The power supply device includes an energy storage device and an inductive power extraction module; the energy storage device is fixedly arranged inside the control device, the energy storage device is connected to the inductive power extraction module through a wire, and the inductive power extraction module is sleeved and fixedly installed on the outer surface of the cable.

[0009] As a further description of the above scheme:

[0010] The signal transmitting device and the signal receiving device are connected to one end away from the cable and are installed with a signal transmitting and receiving module. The signal generating and receiving module has the same outer diameter as the power supply device, and the signal generating and receiving module and the power supply device are located on the same horizontal line. The control device is installed on the top of the signal generating and receiving module; the end face of the signal transmitting and receiving module away from the power supply device is arranged on the same vertical line as the front end face of the control device.

[0011] As a further description of the above scheme:

[0012] The control device is connected to the power supply device, the signal transmitting device and the signal receiving device through wires, and the wires are arranged inside the signal transmitting and receiving modules and the inductive power extraction module. The control device is a box-type structure, and a wireless transmission component is arranged inside the control device, and the wireless transmission component is wirelessly connected to the control computer.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0014] In the utility model, by sleeve-arranging the signal transmitting and receiving modules of the fault detection device on the cable, the remote monitoring of the cable is realized, so that the cable does not need to be dug out when monitoring the cable fault, thereby improving the efficiency of cable fault detection and protecting the cable;

[0015] In the utility model, by setting a pulse signal transmitting device connected to the cable, the pulse signal transmitting device is electrically configured by relying on the cable, so as to reduce the occupied space of the components; by compressing the volume of the fault detection device, the stability of the wiring-free high-voltage cable is increased;

[0016] In the utility model, by setting a plurality of parallel fault detection devices, when a certain detection device fails, other detection devices are used to detect the fault area, so as to ensure the reliability and stability of the operation of the detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of a wiring-free high-voltage cable fault detection device;

[0018] Figure 2It is a schematic diagram of a specific embodiment of a wiring-free high-voltage cable fault detection device;

[0019] Among them, 1 is a cable, 2 is a power supply device, 201 is an energy storage device, 202 is an inductive power extraction module, 3 is a signal transmitting device, 4 is a signal receiving device, 5 is a control device, and 6 is a signal transmitting and receiving module. Specific implementation plan

[0020] 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.

[0021] See also Figure 1-2 As shown, a wiring-free high-voltage cable fault detection device includes a cable 1, the cable 1 is deeply buried underground, the fault detection device is sleeved and installed on the cable 1, the fault detection device includes a power supply device 2, a signal transmitting device 3, a signal receiving device 4 and a control device 5, the power supply device 2 adopts a circular ring outer structure, the power supply device 2 is sleeved and installed on the outer surface of the cable 1, and the control device 5 is fixedly welded and installed on the top of the power supply device 2; the signal transmitting device 3 and the signal receiving device 4 are fixedly installed on the outer surface of the cable 1, the signal transmitting device 3 and the signal receiving device 4 are installed on the same horizontal line, and the opposite end faces of the signal transmitting device 3 and the signal receiving device 4 are arranged inside the cable 1.

[0022] In the above embodiment: the power supply device 2 includes an energy storage device 201 and an inductive power extraction module 202; the energy storage device 201 is fixedly arranged inside the control device 5, the energy storage device 201 is connected to the inductive power extraction module 202 through a wire, and the inductive power extraction module 202 is sleeved and fixedly installed on the outer surface of the cable 1.

[0023] In a specific embodiment: the power supply device 2 is used to configure the operating power of the fault detection device. The power supply device 2 has a built-in power supply system. The power supply system draws electricity by induction and stores it in the energy storage system. It is used to power the device after a power outage due to a cable fault, and does not rely on an external power supply. The energy storage device 201 is used to store electricity. In a specific implementation scheme, the energy storage device 201 uses a 150AH-12V drive battery. The energy storage device 201 is characterized by large storage capacity, long service life, easy replacement and excellent stability. The induction power extraction module 202 extracts electricity from the energy storage device 201 through the working principle of the sensor, and configures the operating power to the signal transmitting device 3, the signal receiving device 4 and the signal transmitting and receiving module 6.

[0024] In the above embodiment: the signal transmitting device 3 and the signal receiving device 4 are connected to the end away from the cable 1 and are installed with a signal transmitting and receiving module 6, the signal generating and receiving module 6 has the same outer diameter as the power supply device 2, the signal generating and receiving module 6 and the power supply device 2 are located on the same horizontal line, and the control device 5 is installed on the top of the signal generating and receiving module 6; the end face of the signal transmitting and receiving module 6 away from the power supply device 2 is arranged on the same vertical line as the front end face of the control device 5.

[0025] In a specific embodiment: the signal transmitting device 3 transmits a wireless signal to a cable remote control center through a wireless signal transmitting method, the signal receiving device 4 receives a radio signal from the cable remote control center through a wireless signal receiving method, the signal receiving device 4 converts the radio signal into a control scheme that can be read by the control device 5 through a signal processing scheme, and transmits the control scheme to the control device 4; the signal transmitting and receiving module 6 is installed on the outer ends of the signal transmitting device 3 and the signal receiving device 4 by splicing to protect the signal transmitting transposition 3 and the signal receiving transposition 4, so as to improve the service life of the signal transmitting device 3 and the signal receiving device 4; the signal transmitting and receiving module 6 is installed and protected by a hollow ring structure. The internal wire is improved in service life and stability. In a specific implementation scheme, the signal transmitting device 3 implements a pulse signal to the cable, the signal receiving device 4 is responsible for receiving the pulse signal, and remotely establishes communication with the cable monitoring center through wireless communication, and the cable monitoring center realizes cable fault detection by calculating the pulse signal.

[0026] In the above embodiment: the control device 5 is connected to the power supply device 2, the signal transmitting device 3 and the signal receiving device 4 through wires, the wires are arranged inside the signal transmitting and receiving module 6 and the inductive power supply module 202, the control device 5 is a box-type structure, and a wireless transmission component is arranged inside the control device 5, and the wireless transmission component is wirelessly connected to the control computer.

[0027] In a specific embodiment: the control device 5 is controlled by the cable monitoring center through radio signals; the control device 5 is connected to the signal transmission transposition device 3 through a wire, and the control device 3 controls the operation of the fault detection device by controlling the operation of the signal transmission transposition device 3; the control device 5 reads the control scheme and controls the signal transmission device 3 to transmit a pulse signal to the cable to detect the cable.

[0028] A specific implementation scheme of a wiring-free high-voltage cable fault detection device is as follows: a power supply device 2 draws electricity through induction and stores it in an energy storage device 201; when a cable fault causes a power outage, a cable remote control center automatically sends a command to the detection device through wireless communication, a signal receiving device 4 in the detection device receives and processes the signal, and outputs a control scheme to the control device 5, the control device 5 reads the control scheme and controls the signal transmitting device 3 to transmit a pulse signal to the cable, the signal receiving device 4 is responsible for receiving the pulse signal, and remotely establishing communication with the cable monitoring center through wireless communication, the monitoring center obtains the fault distance by calculating the time difference between the transmitted pulse signal and the reflected pulse signal and the product of the pulse signal propagation speed in the cable, and completes the positioning of the cable fault.

[0029] Two or more fault detection devices are pre-buried and installed on an underground cable according to the cable length. The installation distance between each two detection devices shall not exceed 5 kilometers. If the distance is too long, the pulse signal strength cannot be guaranteed. Figure 2 As shown: When a fault occurs in the I# collector line of a wind farm and a power outage occurs, the pulse signal generating systems of detection devices 1#, 2#, and 3# send out a pulse signal. After receiving the pulse signal, the receiving system of each device transmits the relevant data to the monitoring center. The monitoring center stores the information, provides waveform analysis and display functions, obtains the fault location information through analysis and calculation, and sends out an alarm signal.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0031] 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 wiring-free high-voltage cable fault detection device, comprising a cable (1), wherein the cable (1) is deeply buried underground, and a fault detection device is sleeved and installed on the cable (1), wherein the fault detection device comprises a power supply device (2), a signal transmitting device (3), a signal receiving device (4) and a control device (5), wherein the power supply device (2) adopts a circular ring outer structure, wherein the power supply device (2) is sleeved and installed on the outer surface of the cable (1), and the control device (5) is fixedly welded and installed on the top of the power supply device (2); the signal transmitting device (3) and the signal receiving device (4) are fixedly installed on the outer surface of the cable (1), wherein the signal transmitting device (3) and the signal receiving device (4) are installed on the same horizontal line, and the opposite end surfaces of the signal transmitting device (3) and the signal receiving device (4) are arranged inside the cable (1).

2. A wiring-free high-voltage cable fault detection device according to claim 1, characterized in that: The power supply device (2) comprises an energy storage device (201) and an inductive power extraction module (202); the energy storage device (201) is fixedly arranged inside the control device (5); the energy storage device (201) is connected to the inductive power extraction module (202) via a wire; and the inductive power extraction module (202) is sleeved and fixedly mounted on the outer surface of the cable (1).

3. The wiring-free high-voltage cable fault detection device according to claim 1, characterized in that: The signal transmitting device (3) and the signal receiving device (4) are connected to and installed with a signal transmitting and receiving module (6) at one end away from the cable (1); the signal transmitting and receiving module (6) has the same outer diameter as the power supply device (2); the signal transmitting and receiving module (6) and the power supply device (2) are located on the same horizontal line; the control device (5) is installed on the top of the signal transmitting and receiving module (6); the end face of the signal transmitting and receiving module (6) away from the power supply device (2) is arranged on the same vertical line as the front end face of the control device (5).

4. The wiring-free high-voltage cable fault detection device according to claim 1, characterized in that: The control device (5) is connected to the power supply device (2), the signal transmitting device (3) and the signal receiving device (4) via a wire, the wire is arranged inside the signal transmitting and receiving module (6) and the inductive power taking module (202), the control device (5) is a box-type structure, a wireless transmission component is arranged inside the control device (5), and the wireless transmission component is wirelessly connected to the control computer.

Images