Rapid early warning device for transient stability of power grid

Abstract

The utility model belongs to the technical field of power distribution network early warning, and particularly relates to a rapid early warning device for transient stability of a power grid, which comprises a bracket swing arm mounted on a sensor bracket, an assembly component slidably connected to the bracket swing arm, an adjusting component arranged on the assembly component, an early warning module arranged in the assembly component, a hinge rod arranged at one end of the bracket swing arm, and a power transmission mechanism arranged at the other end of the bracket swing arm, the assembling assembly comprises a swing arm sliding block, a protruding shaft is fixedly installed on the swing arm sliding block, an assembling box is slidably connected to the outer side of the swing arm sliding block, a lifting sliding groove is formed in the assembling box, and a side clamping plate is further arranged at the top of the assembling box. According to the rapid early warning device for the transient stability of the power grid, when a line swings in a small amplitude, the support swing arm can swing freely through the hinge rod, the swing arm sliding block slides in the axial direction of the support swing arm, the assembly box is further adapted to the position change of line swinging through the lifting sliding groove under the limitation of the protruding shaft, and therefore mechanical damage caused by line swinging is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of power distribution network early warning technology, and in particular to a rapid early warning device for power grid transient stability. Background Technology

[0002] The stable operation of a power system is a crucial prerequisite for ensuring the reliability and security of power supply. Power system stability can be categorized into static stability and transient stability. Static stability refers to the system's stability under small disturbances, while transient stability focuses on the system's dynamic behavior under large disturbances. Transient stability is a vital concept in power system operation, especially in modern power systems where the operating state has become more complex and diverse due to the continuous expansion of the power grid, the large-scale integration of new energy sources, and the opening of the electricity market.

[0003] Transient stability of a power system refers to whether, under certain operating conditions, the system can reach a new steady-state or return to its original state after being subjected to a large disturbance. With the continuous expansion of modern power systems and the large-scale integration of new energy sources, the operating state of the power grid has become more complex, and the problem of transient stability has become increasingly prominent.

[0004] When a power grid fails, failure to isolate the faulty line in a timely manner can lead to an escalation of the accident, even causing grid system oscillations and potentially resulting in grid paralysis. Therefore, sensors with early warning functions are typically installed on transmission lines with high failure rates to detect potential faults in advance. To maintain the stability of the sensors, appropriate sensor brackets are usually provided. However, some transmission lines use a suspended installation method, allowing the line to sway slightly with the wind direction during windy conditions, thereby reducing mechanical stress. However, existing sensor brackets are mostly fixed structures that cannot sway with the line, easily leading to increased wear and tear on the brackets and the line, ultimately damaging it. Utility Model Content

[0005] In order to overcome the defects of the prior art mentioned above, the inventors conducted in-depth research and, after a great deal of creative work, completed this utility model.

[0006] Specifically, the technical problem to be solved by this utility model is to provide a rapid early warning device for power grid transient stability, so as to solve the technical problem that most existing sensor brackets adopt a fixed structure, which cannot swing with the line when the wind blows, easily leading to increased wear and tear on the bracket and line, and damage to the line.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0008] A rapid early warning device for power grid transient stability includes a support arm mounted on a sensor bracket, an assembly assembly slidably connected to the support arm, an adjustment assembly for line assembly, and an early warning module for rapid early warning within the assembly assembly.

[0009] The bracket arm extends into the sensor bracket and is provided with a hinge rod at one end. The bracket arm is hinged to the sensor bracket via the hinge rod. The bracket arm is also provided with a limiting block at the end away from the hinge rod.

[0010] The assembly assembly includes a swing arm slider slidably connected to the support swing arm, a protruding shaft fixedly installed on the swing arm slider, an assembly box slidably connected to the outside of the swing arm slider, and a lifting groove corresponding to the protruding shaft on the assembly box. The top of the assembly box is also provided with a side clamp plate integrally formed with the assembly box. An adjustment groove is also provided on the side of the assembly box away from the side clamp plate. The assembly box is also provided with a cable arc groove for adapting the line.

[0011] As an improved technical solution, the side clamp is provided with a current connector for detecting the line current, and symmetrically distributed insulating pads are also fixedly installed on the side clamp, and each insulating pad has an arc surface corresponding to the cable arc groove.

[0012] As an improved technical solution, an insulating partition is fixedly installed in the assembly box and below the cable arc groove, and a voltage connector for detecting the line voltage is fixedly installed in the insulating partition.

[0013] As an improved technical solution, the adjustment assembly includes bolts symmetrically distributed in the side clamps, and the end of the assembly box away from the side clamps is also slidably connected to an adjustment clamp that is adapted to the adjustment groove. The end of the bolt that extends through the side clamps to the outside of the adjustment clamp is threadedly connected to a locking nut.

[0014] As an improved technical solution, each bolt is fitted with an insulating sleeve, and the two ends of the insulating sleeve extend into the side clamp and the adjusting clamp, respectively.

[0015] As an improved technical solution, the early warning module includes a data acquisition module fixedly installed in the assembly box and located below the insulating partition. Outside the data acquisition module, there are also current sensing units and voltage sensing units that are respectively connected to the current connector and voltage connector for electrical signal transmission.

[0016] As an improved technical solution, the early warning module also includes a communication module that is electrically connected to the data acquisition module, and the output end of the communication module is connected to a transmitting antenna via a wire.

[0017] After adopting the above technical solution, the beneficial effects of this utility model are:

[0018] 1. In this utility model, when the line swings slightly, the support arm can swing freely on the sensor support through the hinge rod, and the arm slider slides along the axis of the support arm to adapt to the position change after the line swings. Under the restriction of the protruding shaft, the assembly box further adapts to the position change of the line swing through the lifting slide groove, thereby effectively reducing the mechanical damage caused by the line swing.

[0019] 2. This utility model uses bolts and locking nuts to move the adjusting clamp closer to the side clamp, thus fixing the line. At the same time, the insulating sleeve provides insulation protection to prevent current leakage when the line comes into contact with the bolt, ensuring the safe operation of the line.

[0020] 3. In this utility model, the current sensing unit and the voltage sensing unit convert the signal into an electrical signal and transmit it to the data acquisition module. The data acquisition module preprocesses the data and inputs it into the pre-trained model. The communication module transmits the data and the early warning signal to the central processing terminal, thereby realizing rapid early warning of the line. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0022] Figure 1 This is a front structural diagram of the power grid transient stability rapid early warning device of this utility model.

[0023] Figure 2 This is a schematic diagram of the rear structure of the power grid transient stability rapid early warning device of this utility model.

[0024] Figure 3 This is a schematic diagram of the assembly components and support arm of the power grid according to this utility model.

[0025] Figure 4 This is an exploded structural diagram of the assembly and adjustment components of this utility model.

[0026] Figure 5 This is a cross-sectional view of the assembly box of this utility model.

[0027] Figure 6 This is a schematic diagram of the workflow of this utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Support arm; 101. Hinge rod; 102. Limiting block; 2. Assembly assembly; 201. Arm slider; 2011. Protruding shaft; 202. Assembly box; 2021. Lifting slide; 2022. Adjusting slide; 2023. Cable arc groove; 203. Side clamp; 2031. Current connector; 2032. Insulating pad; 204. Insulating partition; 2041. Voltage connector; 3. Adjustment assembly; 301. Bolt; 3011. Locking nut; 302. Adjusting clamp; 303. Insulating sleeve; 4. Early warning module; 401. Data acquisition module; 4011. Current sensing unit; 4012. Voltage sensing unit; 402. Communication module. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0033] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0034] like Figures 1 to 6As shown in the figure, this embodiment provides a power grid transient stability rapid early warning device. This power grid transient stability rapid early warning device includes a support arm 1 mounted on a sensor bracket. An assembly assembly 2 is slidably connected to the support arm 1. The assembly assembly 2 is also provided with an adjustment assembly 3 for line assembly. The assembly assembly 2 is provided with an early warning module 4 for rapid early warning. One end of the support arm 1 extending into the sensor bracket is provided with a hinge rod 101, and the support arm 1 is hinged to the sensor bracket through the hinge rod 101. The end of the swing arm 1 away from the hinge rod 101 is also provided with a limiting block 102. The assembly assembly 2 includes a swing arm slider 201 slidably connected to the support swing arm 1. A protruding shaft 2011 is fixedly installed on the swing arm slider 201. An assembly box 202 is slidably connected to the outer side of the swing arm slider 201. The assembly box 202 has a lifting groove 2021 corresponding to the protruding shaft 2011. The top of the assembly box 202 is also provided with a side clamping plate 203 integrally formed with the assembly box 202. The assembly box 202 is located away from the side clamping plate 203. An adjustment groove 2022 is provided on one side, and a cable arc groove 2023 for adapting the circuit is provided on the assembly box 202. The bracket swing arm 1 is installed on the sensor bracket to support the entire early warning device. The sensor bracket is a relatively mature existing technology and will not be described in detail here. The hinge rod 101 is used to hinge the bracket swing arm 1 to the sensor bracket, allowing the bracket swing arm 1 to swing within a certain range to adapt to the swing of the circuit. The limit block 102 is used to limit the sliding of the swing arm slider 201 on the bracket swing arm 1 to prevent the swing arm slider 201 from falling off. The swing arm slider 201 can slide along the axial direction of the bracket swing arm 1 to adapt to the change of the circuit position when the circuit swings. Under the restriction of the protruding shaft 2011, the assembly box 202 can slide on the swing arm slider 201 through the corresponding lifting groove 2021 to further adapt to the position change of the circuit swing. The side clamp 203 is used to assist in fixing the circuit. The cable arc groove 2023 can better adapt to the circuit and ensure the stability and reliability of the circuit in the assembly box 202.

[0035] The side clamp 203 is provided with a current connector 2031 for detecting the line current. The side clamp 203 is also fixedly installed with symmetrically distributed insulating pads 2032, and each insulating pad 2032 has an arc surface corresponding to the cable arc groove 2023. The side clamp 203 makes contact with the line through the insulating pads 2032, and the arc surface on it helps the cable arc groove 2023 to further adapt to the line. The current connector 2031 is connected to the circuit.

[0036] An insulating partition 204 is fixedly installed in the assembly box 202 and below the cable arc groove 2023. A voltage connector 2041 for detecting line voltage is fixedly installed in the insulating partition 204. The insulating partition 204 provides insulation protection and protection for the warning module 4 below. The voltage connector 2041 is connected to the circuit.

[0037] The adjusting assembly 3 includes bolts 301 symmetrically distributed in the side clamping plate 203, and the end of the assembly box 202 away from the side clamping plate 203 is also slidably connected to the adjusting clamping plate 302 adapted to the adjusting slide groove 2022. The end of the bolt 301 extending through the side clamping plate 203 to the outside of the adjusting clamping plate 302 is threadedly connected to the locking nut 3011. The bolt 301 can cooperate with the locking nut 3011 to make the adjusting clamping plate 302 move closer to the side clamping plate 203 and complete the fixation of the limiting line.

[0038] Each bolt 301 is fitted with an insulating sleeve 303. The two ends of the insulating sleeve 303 extend into the side clamp 203 and the adjusting clamp 302, respectively. The insulating sleeve 303 provides insulation protection to prevent current leakage between the line and the bolt 301.

[0039] The early warning module 4 includes a data acquisition module 401 fixedly installed in the assembly box 202 and located below the insulating partition 204. Outside the data acquisition module 401, there are also current sensing units 4011 and voltage sensing units 4012 that are electrically connected to the current connector 2031 and voltage connector 2041, respectively. The data acquisition module 401 is a relatively mature technology that can realize the acquisition and preprocessing of current and voltage data.

[0040] The early warning module 4 also includes a communication module 402 that is electrically connected to the data acquisition module 401. The output of the communication module 402 is also connected to a transmitting antenna via a wire. The communication module 402 is used to transmit the acquired data to the central processing terminal and to realize wireless data transmission via the transmitting antenna.

[0041] When installing early warning systems for power transmission lines, a sensor bracket is pre-set at the installation location, and the bracket swing arm 1 is installed on the sensor bracket to ensure that it can swing freely around the hinge rod 101. The swing arm slider 201 slides along the axis of the bracket swing arm 1, and the sliding range of the swing arm slider 201 is limited by the limit block 102 to prevent it from falling off. This allows the assembly box 202 to be stably assembled with the line. The line is placed in the cable arc groove 2023 of the assembly box 202, and the arc surface of the insulating pad 2032 on the side clamp 203 is further adapted to fit the line. By tightening the locking nut 3011 corresponding to the bolt 301, the adjusting clamp 302 moves closer to the side clamp 203 to complete the fixation of the line. At the same time, the insulating sleeve 303 provides insulation protection to prevent current leakage when the line comes into contact with the bolt 301.

[0042] When the wind-blowing line exhibits a controllable small-amplitude oscillation, the support arm 1 can swing on the fixed sensor support via the hinge rod 101. At the same time, the arm slider 201 slides along the axis of the support arm 1 to adapt to the positional change after the line oscillates. Meanwhile, the assembly box 202 can slide on the arm slider 201 via the lifting slide groove 2021 and under the restriction of the protruding shaft 2011, thereby further adapting to the positional change of the line oscillation, thus adapting to the line oscillation and reducing wear between the assembly box and the line.

[0043] When the power grid is transiently stable, the current and voltage of the line are detected by the current connector 2031 and the voltage connector 2041, respectively. The current sensing unit 4011 and the voltage sensing unit 4012 convert the detected signals into electrical signals and transmit them to the data acquisition module 401. The data acquisition module 401 preprocesses the acquired current and voltage data, including filtering, normalization and other operations, and extracts key features. The data acquisition module 401 inputs the processed data into a pre-trained model such as an LSTM model. The communication module 402 transmits the acquired data and early warning signals to the central processing terminal through the transmitting antenna. The central processing terminal receives the data and performs real-time monitoring. When an early warning signal is received, an alarm is issued to notify the operation and maintenance personnel to take measures.

[0044] It is worth noting that the early warning modules 4 used in this solution are all common solutions in the prior art, and this solution does not involve any improvement to the method or circuit.

[0045] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A rapid early warning device for power grid transient stability, characterized in that: It includes a support arm (1) mounted on a sensor bracket, an assembly assembly (2) slidably connected to the support arm (1), an adjustment assembly (3) for wiring assembly on the assembly assembly (2), and an early warning module (4) for rapid early warning in the assembly assembly (2). The bracket arm (1) extends into the sensor bracket and is provided with a hinge rod (101) at one end. The bracket arm (1) is hinged to the sensor bracket through the hinge rod (101). The bracket arm (1) is also provided with a limiting block (102) at the end away from the hinge rod (101). The assembly component (2) includes a swing arm slider (201) slidably connected to the support swing arm (1). A protruding shaft (2011) is fixedly installed on the swing arm slider (201). An assembly box (202) is slidably connected to the outside of the swing arm slider (201). The assembly box (202) is provided with a lifting groove (2021) corresponding to the protruding shaft (2011). The top of the assembly box (202) is also provided with a side clamp (203) integrally formed with the assembly box (202). An adjustment groove (2022) is also provided on the side of the assembly box (202) away from the side clamp (203). The assembly box (202) is also provided with a cable arc groove (2023) for adapting the line.

2. The power grid transient stability rapid early warning device according to claim 1, characterized in that: The side clamp (203) is provided with a current connector (2031) for detecting the line current. The side clamp (203) is also fixedly installed with symmetrically distributed insulating pads (2032), and each insulating pad (2032) has an arc surface corresponding to the cable arc groove (2023).

3. The power grid transient stability rapid early warning device according to claim 2, characterized in that: An insulating partition (204) is fixedly installed in the assembly box (202) and below the cable arc groove (2023), and a voltage connector (2041) for detecting line voltage is fixedly installed in the insulating partition (204).

4. The power grid transient stability rapid early warning device according to claim 3, characterized in that: The adjustment assembly (3) includes bolts (301) symmetrically distributed in the side clamps (203), and the end of the assembly box (202) away from the side clamps (203) is also slidably connected to an adjustment clamp (302) adapted to the adjustment groove (2022). The bolts (301) extend through the side clamps (203) to the end of the adjustment clamp (302) and are threadedly connected to a lock nut (3011).

5. The power grid transient stability rapid early warning device according to claim 4, characterized in that: Each bolt (301) is fitted with an insulating sleeve (303), and the two ends of the insulating sleeve (303) extend into the side clamp (203) and the adjusting clamp (302), respectively.

6. The power grid transient stability rapid early warning device according to claim 1, characterized in that: The early warning module (4) includes a data acquisition module (401) fixedly installed in the assembly box (202) and located below the insulating partition (204). Outside the data acquisition module (401), there are also current sensing units (4011) and voltage sensing units (4012) that are respectively connected to the current connector (2031) and voltage connector (2041) by electrical signals.

7. The power grid transient stability rapid early warning device according to claim 6, characterized in that: The early warning module (4) also includes a communication module (402) that is electrically connected to the data acquisition module (401), and the output end of the communication module (402) is also connected to a transmitting antenna via a wire.

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