Self-powered remote surge arrester monitor and surge arrester with local pointer display

Abstract

This utility model discloses a self-powered remote-transmission surge arrester monitor and surge arrester with local pointer display. The monitor includes an ammeter, one end of which is connected to the first end of the power extraction system, and the other end of which is connected to the first end of the filtering and current-limiting protection circuit. A voltage limiting protection circuit is also connected to the first end of the power extraction system connected to the ammeter. A communication module is connected to the second end of the power extraction system, and a DAC driver is connected to the third end. This surge arrester monitor achieves consistency between the mechanical ammeter reading and the remote-transmission reading while simultaneously measuring the leakage current through digital isolation and transmitting the data remotely. This solves the problem that existing methods combining mechanical and digital measurements often result in maintenance personnel being unable to determine which reading is more accurate.

Description

Technical Field

[0001] This utility model belongs to the field of online monitoring technology, specifically relating to a self-powered remote-transmitting surge arrester monitor and surge arrester with local pointer display. Background Technology

[0002] Traditional surge arrester pointer monitors cannot meet the requirements for digital measurement and remote transmission. In the use of digital measurement monitors, maintenance personnel may misread the measurement readings. Since mechanical and digital measurement monitors can produce inconsistent readings, combining mechanical and digital measurements can make it impossible for maintenance personnel to determine which reading is more accurate. Currently, there is no relevant technical solution to solve this problem. Utility Model Content

[0003] This utility model provides a self-powered remote surge arrester monitor and surge arrester with local pointer display, which solves the technical defect that if mechanical and digital measurements are combined, maintenance personnel will not be able to determine which reading is more accurate.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] In a first aspect, a self-powered remote surge arrester monitor with local pointer display is provided, comprising: an ammeter, one end of which is connected to a first end of the power extraction system, the other end of which is connected to a first end of a filtering and current limiting protection circuit, and a voltage limiting protection circuit is also connected to the first end of the power extraction system connected to the ammeter.

[0006] The second end of the energy harvesting system is connected to a communication module, and the third end of the energy harvesting system is connected to a DAC driver.

[0007] Furthermore, the energy harvesting system includes an energy harvesting circuit, the first end of which is connected to one end of an ammeter, and the other end of the ammeter is connected to one end of a lightning strike counting circuit.

[0008] The second end of the power harvesting circuit is connected to a communication module, the third end of the power harvesting system is connected to one end of the processor, and the other end of the processor is connected to one end of the DAC driver.

[0009] Furthermore, a changeover switch is connected to the fourth terminal of the energy harvesting circuit.

[0010] Furthermore, the second terminal of the filtering and current limiting protection circuit is also connected to the power harvesting system.

[0011] Furthermore, the third terminal of the filtering and current limiting protection circuit is connected to the first terminal of the rectifier bridge, and the fourth terminal of the filtering and current limiting protection circuit is connected to the second terminal of the rectifier bridge.

[0012] Furthermore, the third end of the rectifier bridge is connected to the first end of the protective component, and the fourth end of the rectifier bridge is connected to the second end of the protective component.

[0013] Furthermore, the second end of the protective component is also connected to one end of the surge arrester.

[0014] Furthermore, the protective component is a zinc oxide valve plate.

[0015] Furthermore, it also includes a microcontroller, which is connected to the power harvesting system.

[0016] Secondly, a surge arrester is provided, including a surge arrester body, on which a surge arrester monitor as described above is installed.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This surge arrester monitor achieves the effect of consistent readings between the mechanical ammeter and the remote transmission of leakage current through digital isolation measurement while the mechanical pointer indicates the leakage current. This solves the problem that existing methods of combining mechanical and digital measurements can lead to maintenance personnel being unable to determine which reading is more accurate.

[0019] 2. By connecting an ammeter and a lightning strike counting circuit, the magnitude of the current and the number of lightning strikes can be monitored in real time.

[0020] 3. The changeover switch can conveniently control the on / off state of the energy harvesting circuit. By operating the changeover switch, the circuit can be turned on or off quickly and effectively, facilitating switching between different working modes.

[0021] 4. The filter circuit can effectively filter out high-frequency noise and interference in the power supply, ensuring that the power harvesting monitor obtains more stable power. The current limiting protection circuit can quickly cut off or limit the current output when the power supply output current exceeds the set value, so as to avoid damage to the power harvesting system caused by overcurrent. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the self-powered remote-transmitting surge arrester monitor with local pointer display provided by this utility model.

[0024] The components include: 1. Ammeter; 2. Energy extraction circuit; 3. Lightning strike counting circuit; 4. Processor; 5. Voltage limiting protection; 6. Communication module; 7. Loop switch; 8. DAC driver; 9. Filtering and current limiting protection circuit; 10. Rectifier bridge; 11. Protective components; 12. Surge arrester. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship 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 the 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, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] Traditional surge arrester pointer monitors cannot meet the requirements of digital measurement and remote transmission. Furthermore, the use of digital measurement monitors can lead to misreading of measurement readings by maintenance personnel. Since mechanical and digital measurement monitors can produce inconsistent readings, combining mechanical and digital measurements makes it impossible for maintenance personnel to determine which reading is more accurate. Currently, there is no relevant technical solution to address this issue. To overcome these shortcomings, the inventors have provided a self-powered remote transmission surge arrester monitor and surge arrester with a local pointer display.

[0031] The present invention will now be described in further detail with reference to the accompanying drawings:

[0032] like Figure 1 As shown, in a first aspect of this utility model, a self-powered remote surge arrester monitor with a local pointer display is provided, including an ammeter 1. One end of the ammeter 1 is connected to a first end of the power extraction system, and the other end of the ammeter 1 is connected to a first end of a filtering and current limiting protection circuit 9. A voltage limiting protection 5 is also connected to the first end of the power extraction system connected to the ammeter 1. A communication module 6 is connected to a second end of the power extraction system, and a DAC driver 8 is connected to a third end of the power extraction system. The power extraction system includes a power extraction circuit 2. The first end of the power extraction circuit 2 is connected to one end of the ammeter 1, and the other end of the ammeter 1 is connected to one end of a lightning strike counting circuit 3. The communication module 6 is connected to a second end of the power extraction circuit 2. The third end of the power extraction system is connected to one end of a processor 4, and the other end of the processor 4 is connected to one end of the DAC driver 8. A changeover switch 7 is connected to a fourth end of the power extraction circuit. The second terminal of the filter and current limiting protection circuit 9 is also connected to the energy harvesting system. The third terminal of the filter and current limiting protection circuit 9 is connected to the first terminal of the rectifier bridge 10. The fourth terminal of the filter and current limiting protection circuit 9 is connected to the second terminal of the rectifier bridge 10. The third terminal of the rectifier bridge 10 is connected to the first terminal of the protection element 11. The fourth terminal of the rectifier bridge 10 is connected to the second terminal of the protection element 11. The second terminal of the protection element 11 is also connected to one end of the surge arrester. The protection element 11 is preferably a zinc oxide varistor.

[0033] The monitor also includes a microcontroller, which is connected to the power harvesting system.

[0034] One end of the monitor is grounded, and the other end is installed on the surge arrester. During operation, the monitor's selector switch 7 connects the O1 and O2 terminals of ammeter 1 to the A1 and A2 terminals respectively. The leakage current passes through the rectifier bridge, filter and current limiting protection circuit 9, lightning strike counting circuit 3, and ammeter to the energy extraction circuit 2. Ammeter 1 indicates the leakage current, and the energy extraction circuit 2 stores energy and supplies power to the MCU and communication module 6. The MCU periodically transmits data through the communication module 6. When the surge arrester is activated by lightning, the lightning current is discharged through the zinc oxide valve plate, and the lightning strike counting circuit 3 outputs a lightning strike signal to the MCU. The MCU records the lightning strike action.

[0035] In calibration mode, the monitor's switch 7 connects the O1 and O2 terminals of ammeter 1 to the B1 and B2 terminals respectively. The MCU outputs calibration data to the DAC driver 8, the DAC driver 8 outputs calibration waveforms to ammeter 1, and ammeter 1 provides calibration current indication. On-site maintenance personnel can observe whether the pointer of ammeter 1 indicates correctly.

[0036] In a second aspect of this embodiment, a surge arrester is provided, including a surge arrester body, on which a surge arrester monitor as described above is installed.

[0037] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A self-powered remote monitor for a surge arrester having a local pointer display, characterized in that, include: Ammeter (1), one end of the ammeter (1) is connected to the first end of the energy harvesting system, the other end of the ammeter (1) is connected to the first end of the filter and current limiting protection circuit (9), and the first end of the energy harvesting system connected to the ammeter (1) is also connected to the voltage limiting protection (5). The second end of the energy harvesting system is connected to a communication module (6), and the third end of the energy harvesting system is connected to a DAC driver (8).

2. The surge arrester monitor of claim 1, wherein, The energy harvesting system includes an energy harvesting circuit (2), the first end of which is connected to one end of an ammeter (1), and the other end of the ammeter (1) is connected to one end of a lightning strike counting circuit (3). The second end of the energy harvesting circuit (2) is connected to the communication module (6), the third end of the energy harvesting system is connected to one end of the processor (4), and the other end of the processor (4) is connected to one end of the DAC driver (8).

3. The surge arrester monitor of claim 2, wherein, The fourth terminal of the energy harvesting circuit is connected to a changeover switch (7).

4. The surge arrester monitor of claim 1, wherein, The second terminal of the filtering and current limiting protection circuit (9) is also connected to the energy harvesting system.

5. The surge arrester monitor of claim 1, wherein, The third terminal of the filtering and current limiting protection circuit (9) is connected to the first terminal of the rectifier bridge (10), and the fourth terminal of the filtering and current limiting protection circuit (9) is connected to the second terminal of the rectifier bridge (10).

6. The surge arrester monitor according to claim 5, characterized in that, The third end of the rectifier bridge (10) is connected to the first end of the protective element (11), and the fourth end of the rectifier bridge (10) is connected to the second end of the protective element (11).

7. The surge arrester monitor according to claim 6, characterized in that, The second end of the protective component (11) is also connected to one end of the surge arrester.

8. The surge arrester monitor according to claim 6 or 7, characterized in that, The protective component (11) is a zinc oxide valve plate.

9. The surge arrester monitor according to claim 1, characterized in that, It also includes a microcontroller, which is connected to the power harvesting system.

10. A surge arrester, characterized in that, It includes a surge arrester body, on which a surge arrester monitor according to any one of claims 1-8 is installed.

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