An intelligent power grid fault locating device

Abstract

The utility model discloses an intelligent power grid fault positioning device, including monitoring center and a plurality of settings on the power grid transmission line and with monitoring center data communication connection's fault monitoring terminal, the utility model is through setting fault monitoring terminal respectively on each point of the power grid transmission line, whether normal energization is monitored to this section line through fault monitoring terminal, and data transmission is given monitoring center, and monitoring center judges transmission line whether normal energization according to fault monitoring terminal, when the line has the fault, can find out fixed line point position in the first time, and the position of the fault is conveniently and quickly searched, the fault monitoring terminal of the present application can be laid through the unmanned plane, and the layout is more convenient, and it is unnecessary to install on line manually, reduces the manual labor intensity, and the installation process is safer.

Description

Technical Field

[0001] This utility model relates to the technical field of power grids, and in particular to the technical field of smart grid fault location devices. Background Technology

[0002] A power system is an integrated system composed of substations and transmission and distribution lines of various voltages, known as a power grid. It comprises three units: substation, transmission, and distribution. The task of the power grid is to transmit and distribute electrical energy and change voltage. Transmission lines are formed by transformers stepping up the voltage of electricity generated by power plants, and then connecting it to the transmission lines via circuit breakers and other control equipment to achieve the transmission of electrical energy. Due to the influence of transmission distance, transmission lines are often characterized by long distances and the need to cross various complex terrains. Furthermore, due to the high voltage characteristics of transmission lines, they must be erected high in the air using iron towers to ensure safety. However, transmission lines at high altitudes are susceptible to environmental and weather conditions such as lightning strikes, wind swaying, and snow accumulation, as well as external forces such as animals, plants, human activities, and debris. Therefore, they are prone to failure and require regular maintenance and inspection.

[0003] In existing technologies, fault location sensing terminals are installed on power transmission lines to monitor the line's condition in real time. Upon detecting a fault, the fault point can be located promptly, facilitating quick and accurate fault location and repair by maintenance personnel, thus improving maintenance efficiency. For example, Chinese utility model patent CN219349035U proposes a power transmission line fault location sensing terminal. However, the problem with existing fault location sensing terminals is their fixed installation method. Installation requires manual fixing of the terminal to the line, which is labor-intensive and unsafe. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art and propose a smart grid fault location device. The fault monitoring terminal can be deployed by drones, reducing manual labor intensity and improving safety.

[0005] To achieve the above objectives, this utility model proposes a smart grid fault location device, including a monitoring center and several fault monitoring terminals installed on the power grid transmission lines and connected to the monitoring center for data communication. Each fault monitoring terminal includes a housing, a control main board installed in the housing, and an open-loop Rogowski coil installed in the housing. The open-loop Rogowski coil is electrically connected to the control main board, and the control main board is provided with a wireless communication module for communicating with the monitoring center. The outer shell is divided into a first half-shell and a second half-shell along its axial direction. The first half-shell has a first wire-passing half-ring at each end and a second wire-passing half-ring at each end for cooperating with the first wire-passing half-ring. The first wire-passing half-ring and the second wire-passing half-ring together form a wire-passing hole for the transmission line to pass through. The first half-shell and the second half-shell are hinged together on one side by a hinge member, and an opening and closing mechanism is provided between the first half-shell and the second half-shell for driving them to rotate and open and close around the hinge member. The two half-rings of the open-loop Rogowski coil are respectively connected to the first half-shell and the second half-shell. A hoisting structure is provided on the side of the first half-shell and the second half-shell near the hinge position.

[0006] Preferably, the first half-shell and the second half-shell are further provided with an open-loop electromagnetic energy harvesting device, and the two half-rings of the open-loop electromagnetic energy harvesting device are respectively connected to the first half-shell and the second half-shell.

[0007] Preferably, the opening and closing mechanism includes at least two electrically operated telescopic rods, the two ends of which are respectively hinged to the inner walls of the first half-shell and the second half-shell.

[0008] Preferably, sealing strips are provided on the contact surface between the first half-shell and the second half-shell, the first wire guide half-ring, and the second wire guide half-ring.

[0009] Preferably, the wire hole positions are respectively provided with positioning brackets for cooperating with the power transmission line.

[0010] Preferably, the method includes a limiting strip horizontally disposed on the upper side of the wire hole, with support blocks at both ends of the limiting strip, and through grooves on the support blocks for the limiting strip to slide through. The support blocks are rotatably disposed on the first half-shell and the second half-shell, and the limiting strip is slidably disposed in the through grooves of the support blocks on both sides. The limiting strip is provided with limiting blocks at both ends to prevent it from disengaging from the through grooves.

[0011] Preferably, a counterweight is provided on the side of the first half-shell and the second half-shell away from the hinge, and the counterweight makes the center of gravity of the fault monitoring terminal located on the side away from the hinge.

[0012] The beneficial effects of this smart grid fault location device are as follows: By setting up fault monitoring terminals at various points along the power grid transmission line, the fault monitoring terminals monitor whether the line segment is energized normally and transmit the data to the monitoring center. The monitoring center determines whether the transmission line is energized normally based on the fault monitoring terminals. When a fault occurs, the fixed line point can be located immediately, facilitating rapid fault location. The fault monitoring terminals of this application can be deployed by drones, making deployment more convenient and eliminating the need for manual installation, thus reducing labor intensity and making the installation process safer.

[0013] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a block diagram of a smart grid fault location device according to this utility model.

[0015] Figure 2 This is a schematic diagram of the structure of a fault monitoring terminal of a smart grid fault location device connected to a power transmission line.

[0016] Figure 3 This is a side view of the fault monitoring terminal structure of a smart grid fault location device according to this utility model.

[0017] Figure 4 This is a side view of the outer casing of a smart grid fault location device of this utility model when it is opened.

[0018] Figure 5 This is a schematic diagram of the internal structure after the outer shell is fully unfolded.

[0019] Figure 6 This is a magnified side view of the positioning bracket.

[0020] in: 1-Monitoring terminal; 2-Fault monitoring terminal; 3-Lifting structure; 4-Positioning bracket; 21-Outer shell; 22-Control main board; 23-Open-loop Rogowski coil; 24-Open-loop electromagnetic energy harvesting device; 26-Electric telescopic rod; 27-Sealing strip; 28-Counterweight block; 41-Limit stop bar; 42-Support block; 211-First half-shell; 212-Second half-shell; 411-Limit stop block; 2111-First wire guide half-ring; 2121-Second wire guide half-ring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0022] In the description of this utility model, it should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to the other element.

[0023] In the description of this utility model, it should be noted that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1:

[0025] See Figures 1-5This utility model discloses a smart grid fault location device, comprising a monitoring center 1 and several fault monitoring terminals 2 installed on the power grid transmission lines and connected to the monitoring center 1 for data communication. Each fault monitoring terminal 2 includes a housing 21, a control main board 22 housed within the housing 21, and an open-loop Rogowski coil 23 housed within the housing 21. The open-loop Rogowski coil 23 is electrically connected to the control main board 22, and the control main board 22 is equipped with a wireless communication module for communication with the monitoring center 1. In this embodiment, fault monitoring terminals 2 are installed at various points along the power grid transmission lines. These terminals monitor whether the line segment is normally energized and transmit the data to the monitoring center 1. The monitoring center 1 determines whether the transmission line is normally energized based on the fault monitoring terminals 2. When a fault occurs, the fixed line location can be identified immediately, facilitating rapid fault location.

[0026] See Figure 2 , Figure 3 , Figure 4 and Figure 5 The outer shell 21 is divided into a first half-shell 211 and a second half-shell 212 along its axial direction. The first half-shell 211 has a first wire-passing half-ring 2111 at each end and a second wire-passing half-ring 2121 at each end for cooperating with the first wire-passing half-ring 2111. The first wire-passing half-ring 2111 and the second wire-passing half-ring 2121 together form a wire-passing hole for the transmission line to pass through. The first half-shell 211 and the second half-shell 212 are hinged together on one side by a hinge member, and an opening and closing mechanism is provided between the first half-shell 211 and the second half-shell 212 for driving them to rotate and open and close around the hinge member. The two half-rings of the open-loop Rogowski coil 23 are respectively connected to the first half-shell 211 and the second half-shell 212. A hoisting structure 3 is provided on the side of the first half-shell 211 and the second half-shell 212 near the hinge position. In this embodiment, the fault monitoring terminal 2 can be deployed by drone, which is more convenient and eliminates the need for manual installation, reducing labor intensity and making the installation process safer. During deployment, the opening and closing mechanism is controlled to unfold the first half-shell 211 and the second half-shell 212. The drone's deployment device or unhooking device is connected to the hoisting structure 3 of the fault monitoring terminal 2. The drone lifts the hoisting structure 3 and places it above the cable to be deployed. Then, it slowly descends until the cable enters the opening between the first half-shell 211 and the second half-shell 212. Then, the opening and closing mechanism is remotely controlled to close the shell. The opening and closing mechanism drives the first half-shell 211 and the second half-shell 212 to close. The cable passes through the wire holes at both ends of the outer shell 21. During the closing of the first half-shell 211 and the second half-shell 212, the open-loop Rogowski coil 23 also closes synchronously, thereby holding the cable. The open-loop Rogowski coil 23 is used to detect whether the cable is normally energized.

[0027] See Figure 5 The first half-shell 211 and the second half-shell 212 are also equipped with an open-loop electromagnetic energy harvesting device 24, with the two half-rings of the open-loop electromagnetic energy harvesting device 24 respectively connected to the first half-shell 211 and the second half-shell 212. The open-loop electromagnetic energy harvesting device 24 supplies power to the device, ensuring continuous operation.

[0028] Preferably, the first half-shell 211 and the second half-shell 212 are further provided with a storage battery, which serves as a backup power source and can be used for emergency power supply.

[0029] Specifically, participation Figure 5 Sealing strips 27 are provided on the contact surfaces between the first half-shell 211 and the second half-shell 212, as well as on the first wire-passing half-ring 2111 and the second wire-passing half-ring 2121. This ensures the sealing performance when the first half-shell 211 and the second half-shell 212 are closed, preventing liquid from entering the interior and affecting the operation of the equipment. Example 2:

[0030] See Figure 3 , Figure 4 , Figure 6 Based on Embodiment 1, positioning brackets 4 for cooperating with power transmission lines are provided at the locations of the wire passage holes. Each positioning bracket 4 includes a limiting stop 41 horizontally positioned above the wire passage hole. Support blocks 42 are provided at both ends of the limiting stop 41. Each support block 42 has a through groove for the limiting stop 41 to slide through. The support blocks 42 are rotatably mounted on the first half-shell 211 and the second half-shell 212. The limiting stop 41 is slidably positioned within the through grooves of the support blocks 42 on both sides, and each limiting stop 41 has limiting blocks 411 at both ends to prevent it from detaching from the through grooves. The positioning brackets 4 can cooperate with power transmission lines. When the UAV hoists the fault monitoring terminal 2 of this application onto the power transmission line, the horizontally positioned limiting stop 41 can cooperate with the power transmission line to limit and position it, facilitating the closure of the first half-shell 211 and the second half-shell 212.

[0031] See Figure 5 The first half-shell 211 and the second half-shell 212 are provided with a counterweight 28 on the side away from the hinge. The counterweight 28 keeps the center of gravity of the fault monitoring terminal 2 on the side away from the hinge. This improves stability and prevents the fault monitoring terminal 2 from falling off the power line due to instability during deployment.

[0032] The working process of this utility model: In the deployment process of this smart grid fault location device, the opening and closing mechanism unfolds the first half-shell 211 and the second half-shell 212, and connects the drone's deployment device or unhooking device to the hoisting structure 3 of the fault monitoring terminal 2. The drone lifts the hoisting structure 3 and places it above the cable to be deployed, then slowly lowers it until the cable enters the opening between the first half-shell 211 and the second half-shell 212. Then, the opening and closing mechanism is remotely controlled to close the shell. The opening and closing mechanism drives the first half-shell 211 and the second half-shell 212 to close, and the cable passes through the wire holes at both ends of the outer shell 21. During the closing of the first half-shell 211 and the second half-shell 212, the open-loop Rogowski coil 23 also closes synchronously, thereby holding the cable. The open-loop Rogowski coil 23 detects whether the cable is normally energized and transmits the data to the monitoring center 1. The monitoring center 1 determines whether the transmission line is normally energized based on the fault monitoring terminal 2.

[0033] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The internal components of the electric slide rail, cylinder, welding machine, electric telescopic rod and controller all adopt conventional models in the existing technology, and their internal structure belongs to the existing technology structure. Workers can complete the normal operation of them according to the existing technical manual. In addition, the circuit connection adopts the conventional connection method in the existing technology, and will not be described in detail here.

[0034] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this utility model, or equivalent structural or procedural transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this utility model patent.

Claims

1. A smart grid fault location device, comprising a monitoring center (1) and a plurality of fault monitoring terminals (2) installed on the power grid transmission lines and connected to the monitoring center (1) via data communication, characterized in that: The fault monitoring terminal (2) includes an outer shell (21), a control motherboard (22) disposed inside the outer shell (21), and an open-loop Rogowski coil (23) disposed inside the outer shell (21). The open-loop Rogowski coil (23) is electrically connected to the control motherboard (22). The control motherboard (22) is provided with a wireless communication module for communicating with the monitoring center (1). The outer shell (21) is divided into a first half-shell (211) and a second half-shell (212) along its axial direction. The first half-shell (211) has a first wire-passing half-ring (2111) at each end and a second wire-passing half-ring (2121) at each end for engaging with the first wire-passing half-ring (2111). The first wire-passing half-ring (2111) and the second wire-passing half-ring (2121) together form a wire-passing hole for the transmission line to pass through. 11) The first half shell (211) is hinged to one side of the second half shell (212) by a hinge member, and an opening and closing mechanism for driving the two half shells (211) and the second half shell (212) to rotate and open and close around the hinge member is provided. The two half rings of the open-loop Rogowski coil (23) are respectively connected to the first half shell (211) and the second half shell (212). A hoisting structure (3) is provided on the side of the first half shell (211) and the second half shell (212) near the hinge position.

2. The smart grid fault location device as described in claim 1, characterized in that: The first half-shell (211) and the second half-shell (212) are also provided with an open-loop electromagnetic energy harvesting device (24), and the two half-rings of the open-loop electromagnetic energy harvesting device (24) are respectively connected to the first half-shell (211) and the second half-shell (212).

3. The smart grid fault location device as described in claim 1, characterized in that: The opening and closing mechanism includes at least two electric telescopic rods (26), the two ends of which are hinged to the inner walls of the first half shell (211) and the second half shell (212), respectively.

4. The smart grid fault location device as described in claim 1, characterized in that: Sealing strips (27) are provided on the contact surface between the first half shell (211) and the second half shell (212), the first wire guide half ring (2111), and the second wire guide half ring (2121).

5. The smart grid fault location device as described in claim 1, characterized in that: The outer casing (21) has positioning brackets (4) at both ends of the wire hole for cooperating with the power transmission line.

6. The smart grid fault location device as described in claim 5, characterized in that: The positioning bracket (4) includes a limiting stop (41) arranged horizontally on the upper side of the wire hole. The limiting stop (41) has support blocks (42) at both ends. The support blocks (42) have through grooves for the limiting stop (41) to slide through. The support blocks (42) are rotatably disposed on the first half shell (211) and the second half shell (212). The limiting stop (41) is slidably disposed in the through grooves of the support blocks (42) on both sides. The limiting stop (41) has limiting blocks (411) at both ends to prevent it from disengaging from the through groove.

7. The smart grid fault location device as described in claim 1, characterized in that: The first half-shell (211) and the second half-shell (212) are provided with a counterweight (28) on the side away from the hinge, and the counterweight (28) makes the center of gravity of the fault monitoring terminal (2) located on the side away from the hinge.

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