On-line monitoring device for overvoltage of transformer substation

Abstract

The utility model provides a transformer station overvoltage on-line monitoring device which comprises an elastic stable telescopic frame, two ends of the elastic stable telescopic frame are respectively fixed with two lower monitoring shells, an integrated board bottom box is arranged below each lower monitoring shell, and an upper monitoring shell matched with the integrated board bottom box is arranged above each lower monitoring shell. Solar panels are laid on the surfaces of the upper portion and the two sides of each monitoring box body. A global positioning system antenna and a wireless terminal device antenna are arranged on the monitoring box body, and a line channel is formed on the monitoring box body; according to the utility model, the stability is obviously enhanced, the external interference is effectively resisted, the dislocation phenomenon is reduced, the long-term stable operation is ensured, and a reliable basis is provided for overvoltage prevention. Meanwhile, the power generation efficiency is improved, the service life is prolonged, and the maintenance cost is reduced. In addition, the device can adapt to different cable intervals and installation environments due to the scalability of the telescopic frame, the flexibility is improved, and the application range is widened.

Description

Technical Field

[0001] This utility model belongs to the field of voltage monitoring technology, and in particular relates to an online overvoltage monitoring device for substations. Background Technology

[0002] Substations play a crucial role in power systems. However, due to the electrical connection characteristics between substations and transmission lines, when either the transmission line or the substation experiences a fault such as a lightning strike, the lightning current waveform can infiltrate the substation along the transmission line, causing lightning overvoltage. Furthermore, the operation of switching equipment such as disconnectors within the substation can also generate operational overvoltages. These types of overvoltages can all impact the equipment within the substation. Damage to equipment due to overvoltage can cause incalculable losses to the power grid and have a significant impact on industrial and agricultural production.

[0003] Transformers, relays, and other equipment within substations are core components, not only expensive but also difficult to repair and unable to self-heal after insulation damage. Therefore, real-time monitoring of overvoltages within substations is crucial, as it helps guide the formulation and implementation of overvoltage prevention and mitigation measures. For example, Chinese utility model patent document CN217521262U describes an online overvoltage monitoring device for substations. This device is installed on both the outgoing and incoming lines of the substation and uses built-in voltage and current sensors and other electronic components to achieve real-time online monitoring of cables.

[0004] However, this type of monitoring device currently has some problems. Because each device is independently installed on its corresponding cable and lacks necessary support or restraint mechanisms, it is highly susceptible to external vibrations and disturbances. This can lead to minor or even significant misalignment, such as tipping or shifting, making it difficult to maintain a normal installation state over a long period. Once a device becomes misaligned, it not only affects its monitoring accuracy but may also prevent the solar panels from receiving maximum sunlight, thus impacting their operational efficiency.

[0005] Therefore, it is essential to invent an online overvoltage monitoring device for substations. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model provides an online overvoltage monitoring device for substations, comprising a spring-loaded stabilizing telescopic frame, a lower monitoring shell, an integrated board base box, an upper monitoring shell, a solar panel, a global positioning system antenna, a wireless terminal equipment antenna, and a line channel. The two ends of the spring-loaded stabilizing telescopic frame are respectively fixed to two of the lower monitoring shells. An integrated board base box is installed below each lower monitoring shell, and a matching upper monitoring shell is installed above it. The lower and upper monitoring shells together constitute a complete monitoring box. Solar panels are laid on the top and side surfaces of each monitoring box. A global positioning system antenna and a wireless terminal equipment antenna are installed on the monitoring box, forming the aforementioned line channel.

[0007] Preferably, a current sensor and an energy harvesting coil are installed in the accommodating cavity of the lower and upper monitoring shells; a conditioning circuit board, a voltage sensor, and a power board are installed in the integrated board base box.

[0008] Preferably, both the lower and upper monitoring shells are provided with corresponding recessed grooves, which together form a complete circuit channel. One side of the lower surface of the lower monitoring shell, i.e., one side of the integrated board bottom box, is connected to the elastic stabilizing telescopic frame, which is located between the two monitoring shells.

[0009] Preferably, the elastic stabilizing telescopic frame includes scissor links, connecting rods, mounting pins, tension springs, and sockets. There are two scissor links, and both ends of each scissor link are connected to the mounting pins via the two connecting rods. There are two tension springs, and the end of each tension spring is inserted into the socket through which the mounting pins pass. Each tension spring is located below each scissor link.

[0010] Preferably, the connecting rod is rotatably connected to the upper end of the mounting pin, and the connecting rods are arranged in groups of two, with four groups in total, and the two connecting rods in each group are arranged in a cross configuration.

[0011] Preferably, the lower end of the mounting pin protrudes from the fixing plate and is fitted with a limiting nut, and the fixing plate is fixed to the lower monitoring shell.

[0012] Preferably, the lower end of the mounting pin is provided with threads that engage with the threaded limit nut, which is used to securely connect the mounting pin and the fixing plate together.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention, by introducing a spring-loaded, stabilizing telescopic frame, significantly enhances the stability of the substation overvoltage online monitoring device. It effectively resists interference from external vibrations and disturbances, greatly reducing misalignment phenomena such as tipping and shifting, and ensuring long-term stable installation. This improvement not only enhances the continuity and accuracy of overvoltage data collection, providing a more reliable basis for formulating and implementing overvoltage prevention and mitigation measures, but also optimizes the efficiency of the solar panels, ensuring they always maintain the optimal angle for receiving sunlight. This improves power generation efficiency, extends service life, and ultimately reduces the device's maintenance costs.

[0015] Furthermore, the elastic stabilizing telescopic frame of this invention is telescopic, allowing the device to adapt to the spacing between different cables and the requirements of the installation environment. This design increases the flexibility and applicability of the device, enhancing its practical value. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the bottom structure of this utility model.

[0018] Figure 3 This is a structural schematic diagram of the elastic stabilizing telescopic frame of this utility model.

[0019] Figure 4 This is a utility model Figure 3 A magnified schematic diagram of the structure at point A.

[0020] In the picture:

[0021] Elastic stabilized telescopic frame 1, scissor linkage 11, connecting rod 12, mounting pin 13, tension spring 14, socket 15, fixing plate 16, limiting nut 17, lower monitoring shell 2, integrated board base box 3, upper monitoring shell 4, solar panel 5, global positioning system antenna 6, wireless terminal equipment antenna 7, line channel 8. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0023] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for 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 the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0024] As attached Figure 1 To be continued Figure 4 As shown:

[0025] This utility model provides an online overvoltage monitoring device for substations, comprising a spring-loaded stabilizing telescopic frame 1, a lower monitoring shell 2, an integrated plate base box 3, an upper monitoring shell 4, a solar panel 5, a global positioning system antenna 6, a wireless terminal equipment antenna 7, and a line channel 8. The two ends of the spring-loaded stabilizing telescopic frame 1 are respectively fixed to two of the lower monitoring shells 2. An integrated plate base box 3 is installed below each lower monitoring shell 2, and a matching upper monitoring shell 4 is installed above it. The lower monitoring shells 2 and upper monitoring shells 4 together form a complete monitoring box. Solar panels 5 are laid on the top and side surfaces of each monitoring box. The global positioning system antenna 6 and the wireless terminal equipment antenna 7 are installed on the monitoring box, forming the line channel 8.

[0026] Furthermore, current sensors and energy harvesting coils are carefully installed within the cavities of the lower monitoring housing 2 and the upper monitoring housing 4. These key components provide the foundation for the device's monitoring functions. Inside the integrated board base box 3, conditioning circuit boards, voltage sensors, and power supply boards are cleverly arranged. These components together constitute the core signal processing and power supply system of the device.

[0027] Furthermore, the current sensor employs a Rogowski coil, encased in an aluminum layer. This design is not only aesthetically pleasing but, more importantly, effectively prevents interference from strong electric fields, ensuring stable sensor operation. The Rogowski coil also features a double-semi-circular structure, facilitating installation and maintenance. The voltage sensor utilizes capacitive voltage divider technology, comprising two parts: power frequency voltage measurement and traveling wave voltage measurement. These parts are embedded within the integrated board housing 3 and sealed with rubber to ensure long-term reliability even in harsh environments. The power extraction coil also employs a double-semi-circular structure, powering the device through electromagnetic induction; its design also prioritizes ease of installation and maintenance.

[0028] Furthermore, the combined use of wireless terminal equipment (such as the DTU board) and wireless terminal equipment antenna 7 enables the device to send processed data to the server in real time, realizing remote monitoring and analysis functions. The connection between the Global Positioning System antenna (GPS antenna) and the GPS module ensures accurate timing of the waveform signal, providing strong support for data accuracy. In addition, the output of the power extraction coil uses shielded copper wire connected to the power board, further preventing electromagnetic interference from affecting the acquisition circuit and improving data stability.

[0029] Furthermore, both the lower monitoring housing 2 and the upper monitoring housing 4 are provided with corresponding recessed grooves, which together form a complete wiring channel 8, facilitating the connection and fixation of the wiring. Simultaneously, one side of the lower surface of the lower monitoring housing 2 is connected to the elastic stabilizing telescopic frame 1. This design allows the elastic stabilizing telescopic frame 1 to be positioned between the two monitoring housings, providing additional stability and adjustability to the device.

[0030] Furthermore, the elastic stabilizing telescopic frame 1 is composed of components such as scissor links 11, connecting rods 12, mounting pins 13, tension springs 14, and insertion slots 15. Two scissor links 11 are provided, with both ends of each scissor link 11 connected to the mounting pins 13 via two connecting rods 12. This structure allows the telescopic frame to extend and retract within a certain range, adapting to different installation requirements. Two tension springs 14 are provided, with the end of each spring 14 inserted into the insertion slot 15 through which the mounting pins 13 pass, providing stable elastic support for the telescopic frame.

[0031] Furthermore, the connecting rod 12 is rotatably connected to the upper end of the mounting pin 13, and the two connecting rods 12 in each group are arranged in a cross pattern. This design not only enhances the stability of the structure but also makes the telescopic frame move more smoothly during telescopic movement. The lower end of the mounting pin 13 extends through the fixing plate 16 and is fitted with a limiting nut 17. The fixing plate 16 is fixed to the lower monitoring housing 2. The lower end of the mounting pin 13 is provided with threads that engage with the limiting nut 17. By tightening the limiting nut 17, the mounting pin 13 and the fixing plate 16 can be firmly connected together, providing stable support for the entire device.

[0032] Installation process

[0033] During the preparation phase, ensure that all components, such as the elastic stabilizing telescopic frame 1, lower monitoring housing 2, integrated board base box 3, upper monitoring housing 4, solar panel 5, GPS antenna 6, and wireless terminal equipment antenna 7, are complete and undamaged. Simultaneously, check the installation environment to ensure sufficient space and prepare the necessary installation tools.

[0034] Next, begin installing the elastic stabilizer telescopic frame 1. First, fix the fixing plate 16 to the predetermined position on the lower monitoring housing 2. Then, connect both ends of the scissor rod 11 to the mounting pin 13 via connecting rods 12, ensuring that the connecting rods 12 are rotatably connected to the upper end of the mounting pin 13, with the two connecting rods 12 in each group arranged crosswise. Next, insert the end of the tension spring 14 into the socket 15 of the mounting pin 13 to provide elastic support for the telescopic frame. Then, pass the lower end of the mounting pin 13 through the fixing plate 16 and install the limiting nut 17, securing the mounting pin 13 and the fixing plate 16 firmly by tightening the limiting nut 17.

[0035] Next, the monitoring housing is assembled. The integrated board base box 3 is installed below the lower monitoring housing 2, and components such as the conditioning circuit board, voltage sensor, and power board are installed inside the integrated board base box 3. Then, the upper monitoring housing 4 is installed on top of the lower monitoring housing 2, ensuring that the two are tightly joined to form a complete monitoring housing.

[0036] Next, install the sensors and coils. Install the current sensor and power extraction coil inside the housing of the monitoring box, ensuring they are correctly positioned and securely fixed. Then, install the antennas and wiring. Install the GPS antenna 6 and the wireless terminal device antenna 7 on the monitoring box, ensuring they are positioned to receive good signals. Connect the output of the power extraction coil to the power board using shielded copper wire to prevent electromagnetic interference. Simultaneously, install wiring in the recesses of the lower monitoring housing 2 and the upper monitoring housing 4, constructing a complete wiring channel 8.

[0037] Finally, install the solar panels. Lay the solar panels 5 on the top and sides of the monitoring box, ensuring they receive ample sunlight. After all installation is complete, conduct a final check and testing to ensure all components are installed correctly, wiring connections are secure, and then turn on the device for initial testing to ensure all components are functioning properly.

[0038] Working principle

[0039] The working principle of the substation overvoltage online monitoring device mainly includes monitoring function, data communication, elastic stabilizing telescopic frame function, solar power supply, and remote monitoring and analysis.

[0040] First, current and voltage sensors monitor changes in current and voltage at the substation, respectively. An energy harvesting coil powers the device through electromagnetic induction while simultaneously monitoring current changes. The monitored data is processed by a conditioning circuit board and then transmitted to the wireless terminal device.

[0041] In terms of data communication, wireless terminal equipment (such as a DTU board) transmits processed data to the server in real time via the wireless terminal equipment antenna 7. Simultaneously, the Global Positioning System antenna is connected to the GPS module to ensure accurate timing of the waveform signal, thereby improving data accuracy.

[0042] The elastic stabilizing telescopic frame 1, through the coordinated use of scissor links 11, connecting rods 12, and tension springs 14, provides additional stability and adjustability to the device. The length of the telescopic frame can be adjusted to meet different installation requirements. The solar panels 5 convert sunlight into electricity, providing the device with green and sustainable energy.

[0043] Finally, after receiving the data, the server can perform remote monitoring and analysis to promptly detect and address overvoltage issues in substations. This function is crucial for ensuring the safe and stable operation of the power system.

[0044] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A substation overvoltage online monitoring device, characterized in that, The system includes a flexible, stabilizing telescopic frame (1), a lower monitoring shell (2), an integrated board base box (3), an upper monitoring shell (4), a solar panel (5), a global positioning system antenna (6), a wireless terminal device antenna (7), and a line channel (8). The two ends of the flexible, stabilizing telescopic frame (1) are fixed to the two lower monitoring shells (2) respectively. An integrated board base box (3) is installed below each lower monitoring shell (2), and a matching upper monitoring shell (4) is installed above it. The lower monitoring shells (2) and the upper monitoring shells (4) together form a complete monitoring box. A solar panel (5) is laid on the top and side surfaces of each monitoring box. A global positioning system antenna (6) and a wireless terminal device antenna (7) are installed on the monitoring box, and the line channel (8) is formed therein.

2. The substation overvoltage online monitoring device as described in claim 1, characterized in that: The lower monitoring shell (2) and the upper monitoring shell (4) are equipped with current sensors and energy harvesting coils in their respective cavities; the integrated board bottom box (3) is equipped with a conditioning circuit board, a voltage sensor and a power board.

3. The substation overvoltage online monitoring device as described in claim 2, characterized in that: Both the lower monitoring shell (2) and the upper monitoring shell (4) are provided with corresponding recessed grooves. The recessed grooves of the two together form a complete circuit channel (8). One side of the lower surface of the lower monitoring shell (2), that is, one side of the integrated board bottom box (3), is connected to the elastic stabilizing telescopic frame (1). The elastic stabilizing telescopic frame (1) is set between the two monitoring boxes.

4. The substation overvoltage online monitoring device as described in claim 3, characterized in that: The elastic stabilizing telescopic frame (1) includes scissor links (11), connecting rods (12), mounting pins (13), tension springs (14), and sockets (15). There are two scissor links (11), and both ends of each scissor link (11) are connected to the mounting pins (13) through the two connecting rods (12). There are two tension springs (14), and the end of each tension spring (14) is inserted into the socket (15) through which the mounting pins (13) pass. Each tension spring (14) is located below each scissor link (11).

5. The substation overvoltage online monitoring device as described in claim 4, characterized in that: The connecting rod (12) is rotatably connected to the upper end of the mounting pin (13). The connecting rods (12) are arranged in groups of two, and there are four groups. The two connecting rods (12) in each group are arranged in a cross configuration.

6. The substation overvoltage online monitoring device as described in claim 5, characterized in that: The lower end of the mounting pin (13) extends through the fixing plate (16) and is fitted with a limiting nut (17). The fixing plate (16) is fixed to the lower monitoring shell (2).

7. The substation overvoltage online monitoring device as described in claim 6, characterized in that: The lower end of the mounting pin (13) is provided with threads that engage with the threaded limit nut (17), which is used to securely connect the mounting pin (13) and the fixing plate (16) together.

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