High-voltage precise current source device for detecting lightning arrester monitoring device

Abstract

The utility model relates to the technical field of high-voltage precision current sources, in particular to a high-voltage precision current source device for detecting a lightning arrester monitoring device, which is convenient for increasing voltage, meets the detection requirement of the lightning arrester monitoring device and can protect the safety of the device and an external load. Comprising a body mechanism; the device further comprises a control module and a boosting module, the control module is installed on the main body mechanism, the boosting module is installed on the main body mechanism, the boosting module is connected with the control module, the control module is controlled through the main body mechanism, a low-voltage alternating-current power source is provided for the control module, and the control module adjusts sine-wave voltage. The boost module boosts the output small voltage to a high voltage.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage precision current sources, in particular to a high-voltage precision current source device for calibrating a lightning arrester monitoring device. Background Art

[0002] The arrester monitoring device is used to display the leakage current of the arrester in real time and is widely used in power grids. Therefore, it is very important that the display value of the arrester monitoring device is accurate, otherwise it may cause problems such as false alarms and missed alarms. The arrester monitoring device does not require external power supply and only requires a constant current source to work during verification.

[0003] The existing constant current source device, such as the prior art with application number CN202222124653.3, includes a constant current source device, a fixed shaft, a fixed block, a spring telescopic plate, a limit pin, a fixed plate, a fixed bottom plate, an anti-slip pad, a sealing gasket, a limit hole, a telescopic spring and a fixed ring plate, etc. By setting the anti-slip pad and the limit belt, the stability of the overall placement of the device can be improved during actual use, and the problem of sliding of the constant current source device as a whole can be prevented during actual use.

[0004] However, when calibrating the arrester monitoring device, because the internal resistance of the arrester monitoring device is very large, the output voltage of the constant current source is required to be higher, otherwise the arrester monitoring device cannot be driven. The output voltage of the existing technology is low and cannot meet the calibration requirements of the arrester monitoring device. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a high-voltage precision current source device for calibrating a lightning arrester monitoring device, which is easy to increase the voltage, meets the calibration requirements of the lightning arrester monitoring device, and can protect the safety of the device and external loads.

[0006] The utility model discloses a high-voltage precision current source device for calibrating a lightning arrester monitoring device, comprising a main body structure; further comprising a control module and a boost module, wherein the control module is mounted on the main body structure, the boost module is mounted on the main body structure, the boost module is connected to the control module, the control module is controlled by the main body structure and a low-voltage AC power supply is provided to the control module, the control module adjusts the sinusoidal wave voltage, and the boost module boosts the output small voltage to a high voltage; the control module is controlled by the main body structure and a low-voltage AC power supply is provided to the control module, the control module adjusts the sinusoidal wave voltage, and when the external load of the output current suddenly changes or the load is short-circuited or disconnected, it will cause a drastic fluctuation of the output current, the control module is quickly switched to output externally to protect the safety of the device and the external load, and the boost module boosts the output small voltage to a high voltage to meet the calibration requirements of the lightning arrester monitoring device.

[0007] Preferably, the main structure includes a base, an upper box body, a button module, a main switch, a power socket and a power transformer. The upper box body is installed on the base, and the button module, the main switch, the power socket and the power transformer are all installed on the upper box body. The power transformer is electrically connected to the control module, and the button module is electrically connected to the control module. The 220V AC power enters the main switch after passing through the power socket, and then enters the power transformer. The power transformer converts the 220V AC voltage into a low-voltage AC voltage to provide a low-voltage AC power supply for the control module.

[0008] Preferably, a display module is provided on the upper box body; data display and manual touch control are performed through the display module.

[0009] Preferably, a sampling resistor is also installed on the upper box body, and the sampling resistor electrical signal is connected to the control module; the output current is detected by the sampling resistor, and then feedback adjustment is performed through the control module to protect the safety of the device and the external load.

[0010] Preferably, a current transformer is also installed on the upper box body, and the electrical signal of the current transformer is connected to the control module; the sudden change current is detected by the current transformer, so that the control module performs a protection action.

[0011] Preferably, the boost module includes a high-voltage output positive terminal, a high-voltage output negative terminal and a high-voltage transformer, the high-voltage output positive terminal and the high-voltage output negative terminal are installed on the upper box body, the high-voltage transformer is installed on the upper box body, an output line electrical signal of the high-voltage output end of the high-voltage transformer passes through the current transformer and is connected to the high-voltage output positive terminal, another output line electrical signal of the high-voltage output end of the high-voltage transformer is connected to the sampling resistor, and is connected to the high-voltage output negative terminal after passing through the sampling resistor; the voltage is boosted by the high-voltage transformer.

[0012] Preferably, the control module includes a rectifier bridge unit, a DC / DC unit, a CPU unit, a sine wave generator unit, a power amplifier unit, an AD conversion unit, an operational amplifier unit, a comparator unit and a series resistor voltage divider unit. The CPU unit is electrically connected to the sine wave generator unit, the sine wave generator unit is electrically connected to the power amplifier unit, the sampling resistor is electrically connected to the operational amplifier unit in the control module, the operational amplifier unit is electrically connected to the AD conversion unit, the AD conversion unit is electrically connected to the CPU unit, the current transformer is electrically connected to the series resistor voltage divider unit in the control module, the power transformer is connected to the rectifier bridge unit in the control module, and the rectifier bridge unit is connected to the DC / DC unit; in the control module, the low-voltage AC from the power transformer The power first enters the rectifier bridge unit for rectification and becomes low-voltage direct current. The low-voltage direct current is then converted by the DC / DC unit and becomes direct current with a fixed voltage value to power the entire control module. The CPU unit controls the sine wave generator unit to output a sine wave with adjustable amplitude and frequency. The power amplifier unit amplifies the power of the sine wave. The operational amplifier unit can amplify the voltage signal from the sampling resistor. The AD conversion unit converts the amplified voltage signal into a digital signal. The CPU unit reads the digital signal from the AD conversion unit to obtain the output current value. The electrical signal after voltage division is transmitted to the comparator unit. When the voltage of the signal exceeds the threshold of the comparator unit, the comparator unit transmits the protection signal to the CPU unit, and the CPU unit performs a protection action.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the control module is controlled by the main body mechanism and a low-voltage AC power supply is provided to the control module. The control module adjusts the sinusoidal wave voltage, and when the external load of the output current suddenly changes or the load is short-circuited or open-circuited, it will cause a violent fluctuation in the output current. The control module quickly switches the external output to protect the safety of the device and the external load. The boost module boosts the output small voltage to a high voltage to meet the calibration requirements of the lightning arrester monitoring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the axonometric structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0016] Figure 3 It is a schematic block diagram of the overall principle of the utility model;

[0017] Figure 4 It is a schematic block diagram of the principle structure of the control module of the utility model;

[0018] Markings in the attached figure: 1. base; 2. upper box; 3. high-voltage output positive terminal; 4. high-voltage output negative terminal; 5. display module; 6. button module; 7. main switch; 8. power socket; 9. power transformer; 10. high-voltage transformer; 11. control module; 12. sampling resistor; 13. current transformer; 14. rectifier bridge unit; 15. DC / DC unit; 16. CPU unit; 17. sine wave generator unit; 18. AD conversion unit; 19. power amplifier unit; 20. operational amplifier unit; 21. comparator unit; 22. series resistor voltage divider unit. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0020] Example 1

[0021] like Figures 1 to 4 As shown, a high-voltage precision current source device for calibrating a lightning arrester monitoring device includes a main body, a control module 11 and a boost module, wherein the control module 11 is mounted on the main body, the boost module is mounted on the main body, and the boost module is connected to the control module 11;

[0022] The control module 11 is controlled by the main body mechanism and a low-voltage AC power supply is provided to the control module 11. The control module 11 adjusts the sine wave voltage, and the boost module boosts the output low voltage to a high voltage.

[0023] The main structure includes a base 1, an upper box 2, a key module 6, a main switch 7, a power socket 8 and a power transformer 9. The upper box 2 is installed on the base 1, and the key module 6, the main switch 7, the power socket 8 and the power transformer 9 are all installed on the upper box 2. The power transformer 9 is connected to the control module 11 by electrical signals, and the key module 6 is connected to the control module 11 by electrical signals.

[0024] A display module 5 is provided on the upper box body 2;

[0025] A sampling resistor 12 is also installed on the upper box body 2, and the electrical signal of the sampling resistor 12 is connected to the control module 11;

[0026] The boost module includes a high-voltage output positive terminal 3, a high-voltage output negative terminal 4 and a high-voltage transformer 10. The high-voltage output positive terminal 3 and the high-voltage output negative terminal 4 are mounted on the upper box body 2. The high-voltage transformer 10 is mounted on the upper box body 2. An output line electrical signal of the high-voltage output end of the high-voltage transformer 10 passes through the current transformer 13 and is connected to the high-voltage output positive terminal 3. Another output line electrical signal of the high-voltage output end of the high-voltage transformer 10 is connected to the sampling resistor 12 and is connected to the high-voltage output negative terminal 4 after passing through the sampling resistor 12.

[0027] The control module 11 includes a rectifier bridge unit 14, a DC / DC unit 15, a CPU unit 16, a sine wave generator unit 17, a power amplifier unit 19, an AD conversion unit 18, an operational amplifier unit 20, a comparator unit 21 and a series resistor voltage divider unit 22. The CPU unit 16 is electrically connected to the sine wave generator unit 17, the sine wave generator unit 17 is electrically connected to the power amplifier unit 19, the sampling resistor 12 is electrically connected to the operational amplifier unit 20 in the control module 11, the operational amplifier unit 20 is electrically connected to the AD conversion unit 18, the AD conversion unit 18 is electrically connected to the CPU unit 16, the current transformer 13 is electrically connected to the series resistor voltage divider unit 22 in the control module 11, the power transformer 9 is connected to the rectifier bridge unit 14 in the control module 11, and the rectifier bridge unit 14 is connected to the DC / DC unit 15;

[0028] The current value to be output is set through the key module 6 and the display module 5. After the output is started, the CPU unit 16 controls the sine wave generator unit 17 to output a sine wave. The sine wave frequency is set to 50 Hz. After the sine wave is amplified by the power amplifier unit 19, it is transmitted to the low-voltage driving end of the high-voltage transformer 10, and a high-voltage signal is generated at the high-voltage end of the high-voltage transformer 10 for output. The CPU unit 16 gradually increases the sine wave voltage of the output sine wave generator unit 17 according to the current value fed back by the "sampling resistor 12-op amp unit 20-AD conversion unit 18" until the fed-back current value is equal to the set value.

[0029] Example 2

[0030] like Figures 1 to 4 As shown, a high-voltage precision current source device for calibrating a lightning arrester monitoring device includes a main body, a control module 11 and a boost module, wherein the control module 11 is mounted on the main body, the boost module is mounted on the main body, and the boost module is connected to the control module 11;

[0031] The control module 11 is controlled by the main body mechanism and a low-voltage AC power supply is provided to the control module 11. The control module 11 adjusts the sine wave voltage, and the boost module boosts the output low voltage to a high voltage.

[0032] The main structure includes a base 1, an upper box 2, a key module 6, a main switch 7, a power socket 8 and a power transformer 9. The upper box 2 is installed on the base 1, and the key module 6, the main switch 7, the power socket 8 and the power transformer 9 are all installed on the upper box 2. The power transformer 9 is connected to the control module 11 by electrical signals, and the key module 6 is connected to the control module 11 by electrical signals.

[0033] A display module 5 is provided on the upper box body 2;

[0034] A current transformer 13 is also installed on the upper box body 2, and the electrical signal of the current transformer 13 is connected to the control module 11;

[0035] The boost module includes a high-voltage output positive terminal 3, a high-voltage output negative terminal 4 and a high-voltage transformer 10. The high-voltage output positive terminal 3 and the high-voltage output negative terminal 4 are mounted on the upper box body 2. The high-voltage transformer 10 is mounted on the upper box body 2. An output line electrical signal of the high-voltage output end of the high-voltage transformer 10 passes through the current transformer 13 and is connected to the high-voltage output positive terminal 3. Another output line electrical signal of the high-voltage output end of the high-voltage transformer 10 is connected to the sampling resistor 12 and is connected to the high-voltage output negative terminal 4 after passing through the sampling resistor 12.

[0036] The control module 11 includes a rectifier bridge unit 14, a DC / DC unit 15, a CPU unit 16, a sine wave generator unit 17, a power amplifier unit 19, an AD conversion unit 18, an operational amplifier unit 20, a comparator unit 21 and a series resistor voltage divider unit 22. The CPU unit 16 is electrically connected to the sine wave generator unit 17, the sine wave generator unit 17 is electrically connected to the power amplifier unit 19, the sampling resistor 12 is electrically connected to the operational amplifier unit 20 in the control module 11, the operational amplifier unit 20 is electrically connected to the AD conversion unit 18, the AD conversion unit 18 is electrically connected to the CPU unit 16, the current transformer 13 is electrically connected to the series resistor voltage divider unit 22 in the control module 11, the power transformer 9 is connected to the rectifier bridge unit 14 in the control module 11, and the rectifier bridge unit 14 is connected to the DC / DC unit 15;

[0037] The current value to be output is set through the button module 6 and the display module 5. After the output is started, the CPU unit 16 controls the sine wave generator unit 17 to output a sine wave. The sine wave frequency is set to 50Hz. After the sine wave is amplified by the power amplifier unit 19, it is transmitted to the low-voltage driving end of the high-voltage transformer 10, and a high-voltage signal is generated at the high-voltage end of the high-voltage transformer 10 for output. When the external load of the output current suddenly changes or the load is short-circuited or disconnected, it will cause a violent fluctuation of the output current. The action signal is quickly fed back to the CPU unit 16 through the "current transformer 13-series resistor voltage divider unit 22-comparator unit 21", and the CPU unit 16 quickly switches to external output to protect the safety of the device and the external load.

[0038] like Figures 1 to 4 As shown, the utility model is a high-voltage precision current source device for calibrating a lightning arrester monitoring device. When it is working, the current value to be output is set through the key module 6 and the display module 5. After starting the output, the CPU unit 16 controls the sine wave generator unit 17 to output a sine wave, and the sine wave frequency is set to 50Hz. After the sine wave is amplified by the power amplifier unit 19, it is transmitted to the low-voltage driving end of the high-voltage transformer 10, and a high-voltage signal is generated at the high-voltage end of the high-voltage transformer 10 for output. The CPU unit 16 gradually increases the sine wave voltage of the output sine wave generator unit 17 according to the current value fed back by the "sampling resistor 12-op amp amplification unit 20-AD conversion unit 18" until the current value fed back is equal to the set value. When the external load of the output current suddenly changes or the load is short-circuited or disconnected, it will cause a violent fluctuation of the output current. The action signal is quickly fed back to the CPU unit 16 through the "current transformer 13-series resistor voltage divider unit 22-comparator unit 21", and the CPU unit 16 quickly switches to external output to protect the safety of the device and the external load.

[0039] The display module 5, power transformer 9, high-voltage transformer 10, sampling resistor 12, current transformer 13, rectifier bridge unit 14, DC / DC unit 15, CPU unit 16, sine wave generator unit 17, power amplifier unit 19, AD conversion unit 18, operational amplifier unit 20, comparator unit 21 and series resistor voltage divider unit 22 of the utility model are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for creative labor by technicians in this field.

[0040] The main functions achieved by the utility model are: during the operation of the high-voltage precision current source, it is easy to increase the voltage, meet the calibration requirements of the lightning arrester monitoring device, and protect the safety of the device and the external load.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A high-voltage precision current source device for calibrating a lightning arrester monitoring device, comprising a main body mechanism; characterized in that: It also includes a control module (11) and a boost module, the control module (11) being mounted on the main body structure, the boost module being mounted on the main body structure, and the boost module being connected to the control module (11); The main body mechanism controls the control module (11) and provides a low-voltage AC power supply to the control module (11); the control module (11) adjusts the sine wave voltage, and the boost module boosts the output low voltage to a high voltage; The main body structure comprises a base (1), an upper box (2), a key module (6), a main switch (7), a power socket (8) and a power transformer (9); the upper box (2) is mounted on the base (1); the key module (6), the main switch (7), the power socket (8) and the power transformer (9) are all mounted on the upper box (2); the power transformer (9) is electrically connected to the control module (11); and the key module (6) is electrically connected to the control module (11).

2. A high-voltage precision current source device for calibrating a lightning arrester monitoring device according to claim 1, characterized in that: A display module (5) is arranged on the upper box body (2).

3. A high-voltage precision current source device for calibrating a lightning arrester monitoring device according to claim 1, characterized in that: A sampling resistor (12) is also installed on the base (1), and an electrical signal of the sampling resistor (12) is connected to the control module (11).

4. A high-voltage precision current source device for calibrating a lightning arrester monitoring device according to claim 1, characterized in that: A current transformer (13) is also installed on the upper box body (2), and an electrical signal of the current transformer (13) is connected to the control module (11).

5. A high-voltage precision current source device for calibrating a lightning arrester monitoring device according to claim 1, characterized in that: The boost module comprises a high-voltage output positive terminal (3), a high-voltage output negative terminal (4) and a high-voltage transformer (10). The high-voltage output positive terminal (3) and the high-voltage output negative terminal (4) are mounted on an upper box (2). The high-voltage transformer (10) is mounted on the upper box (2). An output line electrical signal of the high-voltage output end of the high-voltage transformer (10) passes through a current transformer (13) and is connected to the high-voltage output positive terminal (3). Another output line electrical signal of the high-voltage output end of the high-voltage transformer (10) is connected to a sampling resistor (12) and is connected to the high-voltage output negative terminal (4) after passing through the sampling resistor (12).

6. A high-voltage precision current source device for calibrating a lightning arrester monitoring device as claimed in claim 4, characterized in that: The control module (11) comprises a rectifier bridge unit (14), a DC / DC unit (15), a CPU unit (16), a sine wave generator unit (17), a power amplifier unit (19), an AD conversion unit (18), an operational amplifier unit (20), a comparator unit (21) and a series resistor voltage divider unit (22); the CPU unit (16) is electrically connected to the sine wave generator unit (17); the sine wave generator unit (17) is electrically connected to the power amplifier unit (19); the sampling resistor (12) is electrically connected to the operational amplifier unit (20) in the control module (11); the operational amplifier unit (20) is electrically connected to the AD conversion unit (18); the AD conversion unit (18) is electrically connected to the CPU unit (16); the current transformer (13) is electrically connected to the series resistor voltage divider unit (22) in the control module (11); the power transformer (9) is connected to the rectifier bridge unit (14) in the control module (11); and the rectifier bridge unit (14) is connected to the DC / DC unit (15).

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