Lightning arrester detection device

Abstract

The utility model provides a lightning arrester detection device, which relates to the technical field of power transformation equipment detection, and comprises a processor, and a leakage current sensor, a wireless voltage transformer and an infrared thermal image detection probe which are respectively connected with the processor, a first power dedicated chip and a first filter are sequentially connected between the first serial port of the processor and the output end of the leakage current sensor, so that a current signal is transmitted to the processor through the first serial port; a second serial port of the processor is sequentially connected with the second electric power dedicated chip and the wireless signal receiving circuit so as to transmit a voltage signal to the processor through the second serial port; the output end of the infrared thermal image detection probe is connected with a third serial port of the processor so as to transmit a temperature signal to the processor through the third serial port, the novel infrared thermal image, the total current and the resistive current are synchronously detected, and the data consistency is improved; the driving motor drives the magnetic core structure to open and close, so that the safety is improved; and the wireless voltage transformer is used, so that the data accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of power equipment testing technology, and more specifically, to a surge arrester testing device. Background Technology

[0002] Surge arrester testing is a crucial step in ensuring the safe and stable operation of power systems. It involves a series of technical requirements and testing procedures. Through these various testing procedures and technical requirements, the performance and safety status of surge arresters can be comprehensively evaluated, ensuring the stable operation of the power system.

[0003] During surge arrester testing, both offline and live testing are required to obtain surge arrester temperature, total current, and resistive current. However, current testing equipment is independent and cannot perform simultaneous testing. Utility Model Content

[0004] The purpose of this invention is to address the problems in the prior art by providing a surge arrester detection device that can simultaneously detect surge arrester infrared thermal images and total current and resistive current, thereby improving data consistency.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a surge arrester detection device, including a processor and a leakage current sensor, a wireless voltage transformer and an infrared thermal imaging detection probe respectively connected to the processor. A first power-specific chip and a first filter are connected in sequence between the first serial port of the processor and the output terminal of the leakage current sensor so as to transmit current signals to the processor through the first serial port.

[0007] The processor's second serial port is sequentially connected to the second power-specific chip and the wireless signal receiving circuit. The wireless signal receiving circuit is used to receive the wireless signal emitted by the wireless voltage transformer, so as to transmit the voltage signal to the processor through the second serial port.

[0008] The output terminal of the infrared thermal imaging detection probe is connected to the third serial port of the processor to transmit temperature signals to the processor through the third serial port.

[0009] Optionally, the leakage current sensor includes a magnetic core structure and an insulating rod connected to the sidewall of the magnetic core structure;

[0010] The magnetic core structure is placed on a track platform, which is connected to a drive motor. The drive motor drives the track platform to rotate, thereby driving the magnetic core structure to open and close.

[0011] The insulating rod is positioned through the track platform to maintain the insulation distance of the magnetic core structure.

[0012] Optionally, the magnetic core structure includes a magnetic core and a shielding layer and an epoxy shell sequentially disposed on the outside of the magnetic core;

[0013] The shielding layer has a double-layer structure and partially encloses the magnetic core;

[0014] The epoxy shell is square in shape;

[0015] The magnetic core is a silicon steel magnetic core.

[0016] Optionally, the leakage current sensor includes a zero-crossing detection circuit, an opto-isolation module, and a square wave signal to wireless signal circuit connected in sequence, so as to emit the wireless signal through the square wave signal to wireless signal circuit.

[0017] Optionally, the wireless signal receiving circuit includes a wireless signal to square wave signal conversion circuit and a second filter connected in sequence, the second filter being connected to the second power-specific chip;

[0018] The second filter is a fourth-order low-pass filter to convert the square wave signal output by the wireless signal to square wave signal circuit into a sine wave signal.

[0019] Optionally, the infrared thermal imaging detection probe is connected to the third serial port via a USB interface.

[0020] This utility model provides a surge arrester detection device comprising a processor and a leakage current sensor, a wireless voltage transformer, and an infrared thermal imaging detection probe connected to the processor. A first power-specific chip and a first filter are sequentially connected between the processor's first serial port and the output terminal of the leakage current sensor to transmit current signals to the processor via the first serial port. The processor's second serial port is sequentially connected to a second power-specific chip and a wireless signal receiving circuit. The wireless signal receiving circuit receives wireless signals emitted by the wireless voltage transformer to transmit voltage signals to the processor via the second serial port. The output terminal of the infrared thermal imaging detection probe is connected to the processor's third serial port to transmit temperature signals to the processor via the third serial port. The beneficial effects of this utility model include: 1) This utility model achieves synchronous detection of infrared thermal imaging, total current, and resistive current, improving data consistency; 2) The opening and closing of the magnetic core structure is achieved by driving a motor, improving safety; 3) Data accuracy is improved through transmission and access via the wireless voltage transformer. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, 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 application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A system test diagram of a surge arrester testing device provided in this application embodiment;

[0023] Figure 2 This is one of the structural schematic diagrams of a leakage current sensor for a surge arrester detection device provided in an embodiment of this application;

[0024] Figure 3 A second schematic diagram of the structure of a leakage current sensor for a surge arrester detection device provided in this application embodiment;

[0025] Figure 4 This is a circuit connection diagram of a surge arrester detection device provided in an embodiment of this application.

[0026] Icons: 1. Surge arrester antenna; 2. Leakage current sensor; 21. Magnetic core structure; 211. Epoxy shell; 212. Magnetic core; 213. Shielding layer; 22. Track platform; 23. Drive motor; 24. Insulating rod; 3. Wireless voltage transformer; 4. Infrared thermal imaging detection probe. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. It should be noted that, without conflict, the various features in the embodiments of this application can be combined with each other, and the combined embodiments are still within the protection scope of this application.

[0028] During surge arrester testing, both offline and live testing are required to obtain surge arrester temperature, total current, and resistive current. However, current testing equipment is independent and cannot perform simultaneous testing. To address this issue, this application provides a surge arrester testing device that can simultaneously detect surge arrester infrared thermography, total current, and resistive current, thereby improving data consistency.

[0029] like Figure 1 As shown, Embodiment 1 of this application provides a surge arrester detection device, including a processor and a leakage current sensor 2, a wireless voltage transformer 3, and an infrared thermal imaging detection probe 4, which are respectively connected to the processor. The leakage current sensor 2 is used to detect the leakage current of the surge arrester antenna 1. A first power-specific chip and a first filter are sequentially connected between the processor's first serial port and the output terminal of the leakage current sensor 2 to transmit a current signal to the processor through the first serial port. The wireless voltage transformer 3 is used to detect the mutual inductance voltage of the surge arrester antenna 1. The processor's second serial port is sequentially connected to a second power-specific chip and a wireless signal receiving circuit. The wireless signal receiving circuit is used to receive the wireless signal emitted by the wireless voltage transformer 3 to transmit a voltage signal to the processor through the second serial port. The infrared thermal imaging detection probe 4 is used to detect the infrared thermal image data of the surge arrester antenna 1. The output terminal of the infrared thermal imaging detection probe 4 is connected to the processor's third serial port to transmit a temperature signal to the processor through the third serial port.

[0030] Specifically, such as Figure 2 As shown, the leakage current sensor 2 includes a magnetic core structure 21 and an insulating rod 24 connected to the side wall of the magnetic core structure 21; the magnetic core structure 21 is placed on a track platform 22, the track platform 22 is connected to a drive motor 23, the drive motor 23 drives the track platform 22 to rotate to drive the magnetic core structure 21 to open and close; the insulating rod 24 is set through the track platform 22 to maintain the insulation distance of the magnetic core structure 21.

[0031] Specifically, such as Figure 3 As shown, the magnetic core structure 21 includes a magnetic core 212 and a shielding layer 213 and an epoxy shell 211 sequentially disposed outside the magnetic core 212; the shielding layer 213 has a double-layer structure and partially encloses the magnetic core 212; the epoxy shell 211 has a square shape; the magnetic core 212 is a silicon steel magnetic core 212. In this embodiment, the shielding layer 213 adopts a semi-enclosed mode and is a double-layer shield for signal shielding, improving the signal-to-noise ratio of the magnetic core 212; the epoxy shell 211 has a square structure, which can better install on the track platform 22 and realize the opening and closing of the magnetic core 212; the magnetic core 212 is made of silicon steel, with an interface width of 10 mm * 30 mm, a test current range between 100 microamps and 100 milliamps, and is connected to an impedance of 3 ohms.

[0032] Specifically, the leakage current sensor 2 includes a zero-crossing detection circuit, an opto-isolation module, and a square wave signal to wireless signal circuit connected in sequence, so as to emit a wireless signal through the square wave signal to wireless signal circuit.

[0033] Specifically, such as Figure 4As shown, the wireless signal receiving circuit includes a wireless signal to square wave signal conversion circuit and a second filter connected in sequence. The second filter is connected to a second power dedicated chip. The second filter is a fourth-order low-pass filter to convert the square wave signal output by the wireless signal to square wave signal conversion circuit into a sine wave signal.

[0034] Specifically, the infrared thermal imaging detection probe 4 is connected to the third serial port via a USB interface.

[0035] The surge arrester detection device provided in this application embodiment achieves synchronous detection of surge arrester leakage current, transformer voltage and infrared thermal image data by setting up a leakage current sensor 2, a wireless voltage transformer 3 and an infrared thermal imaging detection probe 4.

[0036] like Figure 4 As shown, CT1 is connected to leakage current sensor 2. R11 is a 3-ohm sampling resistor. CT1, along with R12, C2, C9, and R9, forms a first filter which is connected to a first dedicated power chip (in this embodiment, both the first and second dedicated power chips are HLW810 dedicated power chips). The CT1 is connected to the GD321 processor via serial port 1 for data processing. PT1 receives the wireless signal from the wireless voltage transformer 3 and outputs a square wave signal. This square wave signal is converted into a sine wave by a fourth-order low-pass filter composed of R5, C4, R6, C3, R7, C5, R8, and C6, and connected to the second dedicated power chip. PT1 is connected to the GD321 processor via serial port 2. The GD321 processor calculates the resistive current. The GD321 processor reads infrared thermal image data via a third serial port to achieve temperature reading, thus enabling simultaneous detection of total current, resistive current, and infrared thermal image information.

[0037] This invention enables simultaneous detection of infrared thermal imaging, total current, and resistive current, improving data consistency; it enhances safety by driving the magnetic core structure 21 to open and close via the drive motor 23; and it improves data accuracy by transmitting and accessing data via the wireless voltage transformer 3.

[0038] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A surge arrester detection device, comprising a processor and a leakage current sensor (2), a wireless voltage transformer (3), and an infrared thermal imaging detection probe (4) respectively connected to the processor, characterized in that: The first serial port of the processor and the output terminal of the leakage current sensor (2) are connected in sequence to a first power dedicated chip and a first filter, so as to transmit current signals to the processor through the first serial port; The processor's second serial port is connected in sequence to the second power dedicated chip and the wireless signal receiving circuit. The wireless signal receiving circuit is used to receive the wireless signal emitted by the wireless voltage transformer (3) so as to transmit the voltage signal to the processor through the second serial port. The output of the infrared thermal imaging detection probe (4) is connected to the third serial port of the processor to transmit temperature signals to the processor through the third serial port.

2. The surge arrester testing device according to claim 1, characterized in that, The leakage current sensor (2) includes a magnetic core structure (21) and an insulating rod (24) connected to the side wall of the magnetic core structure (21); The magnetic core structure (21) is placed on the track platform (22), which is connected to the drive motor (23). The drive motor (23) drives the track platform (22) to rotate so as to drive the magnetic core structure (21) to open and close. The insulating rod (24) is positioned through the track platform (22) to maintain the insulating distance of the magnetic core structure (21).

3. The surge arrester testing device according to claim 2, characterized in that, The magnetic core structure (21) includes a magnetic core (212) and a shielding layer (213) and an epoxy shell (211) sequentially disposed on the outside of the magnetic core (212); The shielding layer (213) has a double-layer structure and partially encloses the magnetic core (212); The epoxy shell (211) is square in shape; The magnetic core (212) is a silicon steel magnetic core (212).

4. The surge arrester testing device according to claim 1, characterized in that, The leakage current sensor (2) includes a zero-crossing detection circuit, an opto-isolation module, and a square wave signal to wireless signal circuit connected in sequence, so as to emit the wireless signal through the square wave signal to wireless signal circuit.

5. The surge arrester testing device according to claim 1, characterized in that, The wireless signal receiving circuit includes a wireless signal to square wave signal conversion circuit and a second filter connected in sequence, and the second filter is connected to the second power dedicated chip. The second filter is a fourth-order low-pass filter to convert the square wave signal output by the wireless signal to square wave signal circuit into a sine wave signal.

6. The surge arrester testing device according to claim 1, characterized in that, The infrared thermal imaging detection probe (4) is connected to the third serial port via a USB interface.

Images