Distribution network overhead line fault positioning device and positioning method

Abstract

The invention discloses a distribution network overhead line fault positioning device and method, and the device comprises a housing which can be opened and closed, a signal collection unit, a data processing unit, a data transmission unit, and a power unit, and the signal collection unit comprises a traveling wave current sensor and a power frequency current sensor. The data processing unit comprises a mainboard, the mainboard is connected with the traveling wave current sensor and the power frequency current sensor, the data transmission unit comprises a communication assembly and an antenna assembly which are connected with the mainboard, the power supply unit comprises a battery assembly and a power supply board assembly, and the battery assembly is used for providing power support. The power panel assembly is used for providing stable power for the battery assembly. The device adopts a compact structural design, the weight of the device is reduced, the device can be conveniently mounted on a circuit, the influence on the circuit is reduced, and the device lower shell and the device upper shell which are buckled are adopted, so that the device is convenient to mount and dismount.

Description

Technical Field

[0001] The present invention relates to the field of power transmission network fault monitoring, and in particular to a distribution network overhead line fault locating device and a locating method. Background Art

[0002] A distribution network line fault locating device is a device used to detect and locate power system faults. It can detect and locate faults such as short circuits, grounding, and disconnection. At present, when maintaining and repairing distribution network lines, a distribution network line fault locating device is usually used to ensure accurate positioning of the fault location and facilitate timely and rapid repair of line faults. However, the locating device in the prior art is inconvenient to install and disassemble.

[0003] Therefore, in order to solve the above problems, a distribution network overhead line fault locating device is proposed. Summary of the invention

[0004] The invention provides a distribution network overhead line fault locating device and a locating method, aiming to solve the problem of inconvenient installation and disassembly of the locating device existing in the prior art.

[0005] The technical solution provided by the present invention is as follows: A distribution network overhead line fault locating device comprises an openable and closable housing, and a signal acquisition unit, a data processing unit, a data transmission unit and a power supply unit arranged in the housing, wherein a conductor groove is arranged inside the housing; The signal acquisition unit includes a traveling wave current sensor and a power frequency current sensor, wherein the traveling wave current sensor is used to detect the traveling wave current in the power line and convert it into a first electrical signal, and the power frequency current sensor is used to detect the power frequency current in the line and convert it into a second electrical signal; The data processing unit includes a mainboard, which is connected to the traveling wave current sensor and the power frequency current sensor, receives the first electrical signal and the second electrical signal and performs analysis and processing; The data transmission unit includes a communication component and an antenna component, the communication component is connected to the antenna component and the main board, the communication component is used to send the data analyzed and processed by the main board to an external server, and the communication component is used to send the received data to the main board for processing; The power supply unit includes a battery assembly and a power board assembly. The battery assembly is connected to the traveling wave current sensor, the industrial frequency current sensor, the mainboard, the communication assembly and the antenna assembly. The power board assembly is used to provide a stable power supply to the battery assembly.

[0006] Furthermore, the signal acquisition unit also includes a voltage board, which is connected to the main board and is used to detect voltage parameters of the power line and convert the voltage signal into an electrical signal and transmit it to the main board for processing.

[0007] Further, the communication component includes a 4G communication board, and the antenna component includes a GPS antenna and a 4G antenna; The 4G communication board is connected to the 4G antenna and the main board to achieve data communication with an external server. The GPS antenna is connected to the main board to receive satellite signals and provide accurate time synchronization and geographic location information.

[0008] Further, the battery assembly includes a lithium battery; The power board assembly includes an iron core power board and a battery charging power board. The iron core power board is connected to a power-taking iron core, and the power-taking iron core is used to obtain power supply on the line; the iron core power board is connected to the battery charging power board and the main board, and is used to process and convert the power obtained by the power-taking iron core; the battery charging power board is connected to the lithium battery, and stores the power from the power-taking iron core in the lithium battery.

[0009] Furthermore, the power panel assembly also includes a solar panel and a solar power panel, the solar panel is arranged on the top of the shell, and the solar panel is connected to the solar power panel and the main board.

[0010] Furthermore, the shell includes an upper device shell and a lower device shell, the upper device shell is buckled with the lower device shell, and a voltage board cover is arranged in the lower device shell, and the voltage board cover is used to protect the voltage board.

[0011] Furthermore, a lower core cover is provided on the outside of the power-taking core to isolate the power-taking core from the line conductors.

[0012] Furthermore, a threaded guide rod is provided between the device lower shell and the device upper shell for positioning and guiding the device lower shell and the device upper shell to be accurately installed, and a rotating handle is provided at the bottom of the device lower shell.

[0013] Furthermore, a button switch is provided on the housing, and the button switch is connected to the mainboard.

[0014] The present invention also provides a distribution network overhead line fault locating method, using the above distribution network overhead line fault locating device, comprising the following steps: Open the housing, put the wire into the wire groove and close the housing; The traveling wave current sensor detects the traveling wave current in the conductor and converts it into a first electrical signal and sends it to the mainboard; the power frequency current sensor detects the power frequency current in the conductor and converts it into a second electrical signal and sends it to the mainboard; Receive satellite signals through the antenna assembly and send them to the mainboard; Connecting the satellite signal, the first electrical signal and the second electrical signal through the mainboard, performing data analysis and processing, and sending the analyzed and processed data to an external server through the communication component; The external server analyzes the data to determine whether a line fault occurs and locate the fault point.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. Reliable power supply unit: including solar power supply, electromagnetic induction power supply and battery power supply, to ensure that the device can still work normally for a period of time when the power grid is out of power; 2. Compact structure design reduces the weight of the equipment, making it easy to install on the line and reduce the impact on the line. The buckled lower shell and upper shell of the device make installation and disassembly convenient; 3. Good protection ability: The metal shell has good dustproof, moisture-proof and anti-electromagnetic interference capabilities, ensuring stable operation in harsh environments; 4. High-precision signal acquisition unit: It is composed of high-precision voltage and current sensors, which can accurately capture the power frequency and traveling wave signals generated by faults. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a distribution network overhead line fault locating device in an embodiment of the present invention; Figure 2 It is an exploded view of a distribution network overhead line fault locating device in an embodiment of the present invention.

[0017] The reference numerals are as follows: 1-solar panel, 2-upper shell of device, 3-lower shell of device, 4-power-taking iron core, 5-traveling wave current sensor, 6-industrial frequency current sensor, 7-iron core power board, 8-battery charging power board, 9-main board, 10-4G communication board, 11-GPS antenna, 12-4G antenna, 13-voltage board, 14-lithium battery, 15-button switch, 16-voltage board cover, 17-lower iron core cover, 18-rotating handle, 19-threaded guide rod, 20-solar power panel. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present application provided below in conjunction with the accompanying drawings is intended to represent only selected embodiments of the present application, and is not intended to limit the scope of protection claimed in the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0019] It should be understood that in the description of the embodiments of the present invention, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0020] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0021] See also Figure 1 , Figure 2 The present invention provides a distribution network overhead line fault location device, including an openable metal shell, a signal acquisition unit, a data processing unit, a data transmission unit and a power supply unit are installed in the shell, and a wire groove is provided inside the shell. The device locates the fault of the wire of the power line to be detected through the wire groove, that is, the wire groove is the connection point between the wire and the device. The shell includes an upper shell 2 and a lower shell 3 of the device, and the upper shell 2 and the lower shell 3 of the device are buckled together to form the outer shell of the device, which plays a role in protecting the internal components, preventing the internal electronic components from being damaged by external factors such as dust, rain, mechanical collision, etc., and ensuring the normal operation of the device.

[0022] The signal acquisition unit includes a traveling wave current sensor 5 and a power frequency current sensor 6. The traveling wave current sensor 5 is used to detect the traveling wave current in the power line and convert it into a first electrical signal. The power frequency current sensor 6 is used to detect the power frequency current in the line and convert it into a second electrical signal.

[0023] The data processing unit includes a mainboard 9, which is connected to the traveling wave current sensor 5 and the power frequency current sensor 6, receives the first electrical signal and the second electrical signal and performs analysis and processing. The mainboard 9 is the core control and data processing unit of the device, and is used to analyze and process the received signals.

[0024] The data transmission unit includes a communication component and an antenna component. The communication component is connected to the antenna component and the main board 9. The communication component is used to send the data analyzed and processed by the main board 9 to an external server, and the communication component is used to send the received data to the main board 9 for processing.

[0025] The power supply unit includes a battery assembly and a power board assembly. The battery assembly is connected to the traveling wave current sensor 5, the industrial frequency current sensor 6, the main board 9, the communication assembly and the antenna assembly. The power board assembly is used to provide a stable power supply to the battery assembly.

[0026] It should be noted that the traveling wave current is a transient current signal unique to a line fault, and the traveling wave current sensor 5 can capture it. The power frequency current sensor 6 is used to detect the power frequency current (50Hz or 60Hz) in the line. The detection of these current signals plays a vital role in judging the operating status of the line, the occurrence and location of faults. The power frequency current sensor 6 and the traveling wave current sensor 5 are connected to the main board 9 and are two semi-ring-shaped (such as Figure 2 As shown in the figure, they are located in the upper shell 2 and the lower shell 3 of the device respectively. They are responsible for detecting the power frequency current and the traveling wave current in the circuit, converting the current signal into an electrical signal and transmitting it to the mainboard 9.

[0027] Optionally, the signal acquisition unit further includes a voltage board 13, which is connected to the main board 9 and is used to detect voltage parameters of the power line and convert the voltage signal into an electrical signal and transmit it to the main board 9 for processing.

[0028] The voltage board 13 is connected to the main board 9 through a line, and is used to detect the voltage parameters of the power line, convert the voltage signal into an electrical signal and transmit it to the main board 9 for processing, so as to help determine the operating status of the line, such as abnormal conditions such as overvoltage and undervoltage. The main board 9 is connected to the traveling wave current sensor 5, the power frequency current sensor 6, and the voltage board 13, and is used to analyze and process the signal, for example, to determine the fault location by analyzing the traveling wave current and the power frequency current signal.

[0029] Optionally, the communication component includes a 4G communication board 10, and the antenna component includes a GPS antenna 11 and a 4G antenna 12. The 4G communication board 10 is connected to the 4G antenna 12 and the main board 9 to achieve data communication with an external server, and the GPS antenna 11 is connected to the main board 9 to receive satellite signals and provide accurate time synchronization and geographic location information.

[0030] Specifically, the 4G communication board 10 is connected to the 4G antenna 12 and the main board 9 to realize data communication between the device and an external server or a monitoring center, and sends fault information and device status information processed by the main board 9 through the 4G network. At the same time, it can also receive external instructions, such as configuration parameter updates.

[0031] The GPS antenna 11 is connected to the main board 9 and is used to receive satellite signals to provide accurate time synchronization and geographic location information for the device, so that the location of the fault can be accurately determined during fault location, thereby improving the efficiency of distribution network fault repair.

[0032] The 4G antenna 12 is connected to the mainboard 9 and is responsible for sending and receiving wireless signals in the 4G frequency band. It is the interface between the device and the external 4G network to ensure the stability and reliability of data transmission. The 4G antenna 12 is used to send and receive 4G signals to achieve data communication between the device and the external network.

[0033] The main board 9 is connected to the 4G communication board 10 and the GPS antenna 11 , controls the 4G communication board 10 to send data and collects data received by the 4G communication board 10 , and receives the position and time data collected by the GPS antenna 11 .

[0034] Optionally, the battery assembly includes a lithium battery 14 , and the power board assembly includes an iron core power board 7 and a battery charging power board 8 .

[0035] The iron core power board 7 is connected to the power-taking iron core 4, which is used to obtain power supply on the line; the iron core power board 7 is connected to the battery charging power board 8 and the main board 9, and is used to process and convert the power obtained by the power-taking iron core 4; the battery charging power board 8 is connected to the lithium battery 14, and stores the power from the power-taking iron core 4 in the lithium battery 14.

[0036] Specifically, the lithium battery 14 is connected to the battery charging power board 8, and the lithium battery 14 provides backup power for the mainboard 9, 4G communication board 10 and other components that require power of the entire device. The power-taking core 4 is connected to the core power board 7, and is in the shape of two semi-rings, called the upper core and the lower core, which are respectively located in the upper shell 2 and the lower shell 3 of the device. The power-taking core 4 is connected to the core power board 7, and is used to obtain power supply on the line. Obtaining power from the power line provides power support for the operation of the device itself, especially in a suitable electromagnetic environment, it can effectively convert power. When the power-taking core 4 cannot draw power normally, the lithium battery 14 provides continuous power support for the device to ensure that the device can operate normally for a period of time.

[0037] The core power board 7 is connected to the power-taking core 4, the battery charging power board 8, and the main board 9, processes and converts the electric energy obtained by the power-taking core 4, and provides a stable and appropriate power supply for other components inside the device.

[0038] The battery charging power board 8 is connected to the solar power board 20, the iron core power board 7, and the lithium battery 14, and stores the electric energy from the solar panel 1 or the power-taking iron core 4 in the lithium battery 14, providing a backup power supply for the entire device. At the same time, the charging process can also be controlled, such as overcharge protection.

[0039] Optionally, the power panel assembly further includes a solar panel 1 and a solar power panel 20 , wherein the solar panel 1 is disposed on the top of the shell, and the solar panel 1 is connected to the solar power panel 20 and the main board 9 .

[0040] The solar panel 1 is connected to the solar power panel 20, located at the top of the device, and connected to the battery charging power panel 8 and the main board 9 through wires, converting solar energy into electrical energy to charge the lithium battery 14. The solar panel 1 converts sunlight energy into electrical energy, which is a green energy supplement for the device, ensuring that the lithium battery can be charged in the presence of sunlight, reducing dependence on external power sources.

[0041] The solar power panel 20 processes and converts the electric energy obtained by the solar panel 1 to provide a stable and suitable power supply for other components inside the device.

[0042] Optionally, a voltage board cover 16 is provided in the device lower shell 3 , and the voltage board cover 16 is used to protect the voltage board 13 .

[0043] The voltage board cover 16 is installed on the lower shell 3 of the device to protect the voltage board 13 from damage by external environmental factors. The voltage board 13 is protected from damage by external factors such as dust and moisture to ensure the accuracy of the voltage detection function.

[0044] Optionally, a lower core cover plate 17 is provided outside the power-taking core 4 to isolate the power-taking core 4 from the line conductors.

[0045] The lower core cover plate 17 is installed on the lower shell 3 of the device to isolate the lower core of the power-taking core 4 from the line conductor, and protect the internal components such as the power-taking core 4 from external physical damage and environmental factors.

[0046] Optionally, a threaded guide rod 19 is provided between the device lower shell 3 and the device upper shell 2 for positioning and guiding the device lower shell 3 and the device upper shell 2 to be accurately installed, and a rotating handle 18 is provided at the bottom of the device lower shell 3 .

[0047] The rotating handle 18 is installed at the bottom of the lower shell 3 of the device, which is convenient for operators to open or close the device shell and perform operations such as device installation, maintenance or inspection.

[0048] The threaded guide rod 19 is installed between the upper and lower shells of the device to position and guide the upper and lower shells of the device to be accurately installed. During the installation process of the upper and lower shells of the device, it plays a role of positioning and guiding, ensuring that the upper and lower shells can be accurately installed and ensuring the stability and sealing of the internal structure of the device.

[0049] Optionally, a button switch 15 is provided on the housing, and the button switch 15 is connected to the mainboard 9 to receive a user's power on / off operation instruction.

[0050] The button switch 15 is mounted on the device housing and connected to the mainboard 9 via a wire to realize operations such as power on, power off or other function settings, etc. A user operation interface is provided to facilitate users to turn on and off the device.

[0051] The present invention also provides a distribution network overhead line fault locating method, using the above distribution network overhead line fault locating device, comprising the following steps: Step 101, use the installation rod to lift the device, separate the device lower shell 3 and the device upper shell 2 by rotating the handle 18, put the wire into the wire groove and then close the device lower shell 3 and the device upper shell 2.

[0052] Step 102 , the traveling wave current in the conductor is detected by the traveling wave current sensor 5 and converted into a first electrical signal and sent to the mainboard 9 , and the power frequency current sensor 6 is used to detect the power frequency current in the conductor and convert into a second electrical signal and send to the mainboard 9 .

[0053] Step 103 , receiving satellite signals through the GPS antenna 11 and sending them to the main board 9 .

[0054] Step 104 , the satellite signal, the first electrical signal and the second electrical signal are connected through the main board 9 , data analysis and processing are performed, and the analyzed and processed data are sent to an external server through the 4G communication board 10 and the 4G antenna 12 .

[0055] Step 105: Analyze the data through an external server to determine whether a line fault occurs and locate the fault point.

[0056] In actual use, the installer uses the mounting rod to lift the device, rotates the handle to separate the upper and lower shells, moves the device to allow the wire to enter the corresponding wire groove inside the device, and rotates the handle again to close the upper and lower shells to clamp the line wire. The device's power core begins to sense the magnetic field near the line to power the device, and the current sensor and voltage sensor begin to collect the magnetic field and electric field signals near the line and transmit the signals to the mainboard. The mainboard collects GPS data, processes the data, and transmits it to the background system via 4G; the background system determines whether the line is faulty and locates the fault point by analyzing the data; at the same time, the background system can also send instructions to the device for execution via 4G.

[0057] The above is only the best specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application shall be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A distribution network overhead line fault location device, characterized in that: It comprises an openable and closable shell, and a signal acquisition unit, a data processing unit, a data transmission unit and a power supply unit arranged in the shell, and a wire groove is arranged inside the shell; The signal acquisition unit includes a traveling wave current sensor and a power frequency current sensor, wherein the traveling wave current sensor is used to detect the traveling wave current in the power line and convert it into a first electrical signal, and the power frequency current sensor is used to detect the power frequency current in the line and convert it into a second electrical signal; The data processing unit includes a mainboard, which is connected to the traveling wave current sensor and the power frequency current sensor, receives the first electrical signal and the second electrical signal and performs analysis and processing; The data transmission unit includes a communication component and an antenna component, the communication component is connected to the antenna component and the main board, the communication component is used to send the data analyzed and processed by the main board to an external server, and the communication component is used to send the received data to the main board for processing; The power supply unit includes a battery assembly and a power board assembly. The battery assembly is connected to the traveling wave current sensor, the industrial frequency current sensor, the mainboard, the communication assembly and the antenna assembly. The power board assembly is used to provide a stable power supply to the battery assembly.

2. The distribution network overhead line fault locating device according to claim 1, characterized in that: The signal acquisition unit also includes a voltage board, which is connected to the main board and is used to detect voltage parameters of the power line and convert the voltage signal into an electrical signal and transmit it to the main board for processing.

3. The distribution network overhead line fault locating device according to claim 1, characterized in that: The communication component includes a 4G communication board, and the antenna component includes a GPS antenna and a 4G antenna; The 4G communication board is connected to the 4G antenna and the main board to realize data communication with an external server. The GPS antenna is connected to the main board to receive satellite signals and provide accurate time synchronization and geographic location information.

4. The distribution network overhead line fault locating device according to claim 1, characterized in that: The battery assembly includes a lithium battery; The power board assembly includes an iron core power board and a battery charging power board. The iron core power board is connected to a power-taking iron core, and the power-taking iron core is used to obtain power supply on the line; the iron core power board is connected to the battery charging power board and the main board, and is used to process and convert the power obtained by the power-taking iron core; the battery charging power board is connected to the lithium battery, and stores the power from the power-taking iron core in the lithium battery.

5. The distribution network overhead line fault locating device according to any one of claims 1 to 4, characterized in that: The power panel assembly also includes a solar panel and a solar power panel. The solar panel is arranged on the top of the shell, and the solar panel is connected to the solar power panel and the main board.

6. The distribution network overhead line fault locating device according to claim 2, characterized in that: The shell comprises an upper shell and a lower shell, wherein the upper shell is buckled with the lower shell, and a voltage board cover is arranged in the lower shell, and the voltage board cover is used to protect the voltage board.

7. The distribution network overhead line fault locating device according to claim 4, characterized in that: A lower core cover plate is arranged outside the power-taking core to isolate the power-taking core from the line conductor.

8. The distribution network overhead line fault locating device according to claim 6, characterized in that: A threaded guide rod is arranged between the device lower shell and the device upper shell for positioning and guiding the device lower shell and the device upper shell to be accurately installed, and a rotating handle is arranged at the bottom of the device lower shell.

9. The distribution network overhead line fault locating device according to claim 5, characterized in that: The housing is provided with a button switch, and the button switch is connected to the main board.

10. A method for locating a distribution network overhead line fault, using the distribution network overhead line fault locating device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Open the housing, put the wire into the wire groove and close the housing; The traveling wave current sensor detects the traveling wave current in the conductor and converts it into a first electrical signal and sends it to the mainboard; the power frequency current sensor detects the power frequency current in the conductor and converts it into a second electrical signal and sends it to the mainboard; Receive satellite signals through the antenna assembly and send them to the mainboard; Connecting the satellite signal, the first electrical signal and the second electrical signal through the mainboard, performing data analysis and processing, and sending the analyzed and processed data to an external server through the communication component; The external server analyzes the data to determine whether a line fault occurs and locate the fault point.

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