High-voltage electrical product test system and control method thereof

Abstract

The invention provides a high-voltage electrical product test system and a control method thereof, and the system comprises a test cabin module which is used for constructing a test platform and collecting test data; the gas processing module is used for constructing a test condition based on the first control signal in the test platform in the test cabin module; the test power supply module is used for supplying power to the system; the automatic reversing module is used for switching a voltage circuit connected to a test product in the test platform based on the second control signal; the automatic acquisition and control module is used for generating a control signal according to a preset test scheme and acquiring test data acquired in the test cabin module for real-time analysis and judgment; wherein the control signal comprises a first control signal and a second control signal. According to the system, the other modules are efficiently integrated through the automatic acquisition and control module, and the acquired test data and monitoring data are judged, so that the intelligent control of the test process is realized, the test efficiency is improved, and the work intensity of test engineers is reduced.

Description

Technical Field

[0001] This invention belongs to the field of high-voltage electrical testing technology, specifically to a high-voltage electrical product testing system and its control method. Background Technology

[0002] High-voltage electrical products refer to the general term for electrical equipment used in power systems with rated voltages of AC 1000V and above or DC 1500V and above to realize functions such as circuit switching, control, protection, measurement, transformation, and connection. They possess high insulation strength, strong arc-extinguishing capability, high dynamic and thermal stability, and high reliability, and are the core foundational equipment for constructing modern power transmission and distribution networks. According to relevant industry standards, high-voltage electrical products must undergo insulation tests, partial discharge tests, and sealing tests. However, due to limitations in internal insulation, most products can only be tested in climate tanks during high-altitude insulation tests to simulate actual operating conditions. When the atmospheric correction factor is less than K... t When the voltage is less than 1.0, the external insulation is subjected to excessively high voltage during the internal insulation test, often resulting in external insulation discharge. This makes it difficult to accurately assess the internal insulation strength of the test specimen. Furthermore, the insulation basin requires the use of tooling bushings and tooling busbars during insulation testing. If the insulation basin could be tested in an SF6-filled gas environment, the testing difficulty would be reduced. However, for three-phase test specimens, frequent phase changes are necessary during insulation testing, especially at high altitudes. For each test item, the climate tank must be depressurized, the wiring changed inside the climate tank, and the gas re-evacuated for testing, leading to low testing efficiency. When performing insulation tests on 72.5kV and above high-voltage electrical products, if the break test voltage is higher than the ground test voltage, the preferred method is to use two reverse polarity voltage sources for the test. However, in existing technologies, manual wiring is required, which takes a long time to change wires and results in low test efficiency. Therefore, existing high-voltage electrical products require different auxiliary equipment for different tests, such as conventional insulation tests, high-altitude insulation tests, SF6 gas insulation tests, partial discharge tests, and sealing tests. This results in redundant test equipment, and each piece of equipment needs to be operated independently, making the test operation complex and inefficient. Summary of the Invention

[0003] To address the problem that existing high-voltage electrical products require different auxiliary equipment for different tests, resulting in redundant testing equipment and complex and inefficient testing operations due to the need for independent operation of each piece of equipment, this invention proposes a high-voltage electrical product testing system and its control method.

[0004] To achieve the above objectives, the present invention provides the following technical solution: This invention proposes a high-voltage electrical product testing system, the system comprising: The test chamber module is used to construct the test platform and collect test data; A gas processing module is used to construct test conditions based on a first control signal within the test platform of the test chamber module. The test power supply module is used to provide power to the system; An automatic switching module is used to switch the voltage circuit connected to the test product within the test platform based on a second control signal. An automatic acquisition and control module is used to generate control signals according to a preset test plan and to acquire test data collected in the test chamber module for real-time analysis and judgment; wherein, the control signals include the first control signal and the second control signal.

[0005] Preferably, the test chamber module includes a test chamber, which is equipped with an insulating platform for placing the test product. The test chamber is equipped with a gas density sensor and a gas sensor that are communicatively connected to the automatic acquisition and control module. A circulating fan is installed at the bottom of the test chamber.

[0006] Preferably, the test chamber is equipped with an opening and closing door, and the opening and closing door is equipped with an electronic controller. The electronic controller is communicatively connected to the automatic acquisition and control module, and controls the opening and closing of the opening and closing door based on the communication signals of the automatic acquisition and control module. The test chamber is equipped with an image acquisition device that is communicatively connected to the automatic acquisition and control module, used to transmit the real-time status of the test sample in the test chamber to the automatic acquisition and control module.

[0007] Preferably, the test chamber is also equipped with a ventilation system, which includes an exhaust fan.

[0008] Preferably, the gas processing module includes a first gas passage and a second gas passage connected to the test chamber; The first gas path includes a first gas guide pipe. One end of the first gas guide pipe is connected to the interior of the test chamber, and the other end of the first gas guide pipe is connected to the inlet of a first solenoid valve and the outlet of a second solenoid valve. The inlet of the second solenoid valve is connected to the outlet of the SF6 gas station, the outlet of the first solenoid valve is connected to the inlet of the SF6 recovery pump, and the outlet of the SF6 recovery pump is connected to the inlet of the SF6 gas station. The second gas path includes a second gas guide pipe, one end of which is connected to the interior of the test chamber, and the other end of which is connected to the outlet of the third solenoid valve and the inlet of the vacuum pump, respectively. The first solenoid valve, the second solenoid valve, the third solenoid valve, the SF6 gas station, the SF6 recovery pump, and the vacuum pump are all communicatively connected to the automatic acquisition and control module.

[0009] Preferably, a first pressure gauge is provided on the first air guide tube, and a second pressure gauge is provided on the second air guide tube; The second barometer and the first barometer are communicatively connected to the automatic data acquisition and control module.

[0010] Preferably, the test power supply module includes a first power supply module and a second power supply module; The first power supply module includes a first impulse voltage input device and a first power frequency voltage input component; The first power frequency voltage input component includes a first power frequency voltage input device and a first coupling capacitor. The input and output terminals of the first impulse voltage input device, the first power frequency voltage input device, and the first coupling capacitor are electrically connected to the automatic commutation module. The other end of the first coupling capacitor is connected to one end of a first matching impedance. The other end of the first matching impedance is connected to the second partial discharge measurement system. The first impulse voltage input device is electrically connected to the automatic commutation module. The second power supply module includes a second impulse voltage input device and a second power frequency voltage input component; The second power frequency voltage input component includes a second power frequency voltage input device and a second coupling capacitor. The input and output terminals of the second impulse voltage input device, the second power frequency voltage input device, and the second coupling capacitor are electrically connected to the automatic commutation module. The other end of the second coupling capacitor is connected to one end of a second matching impedance, and the other end of the second matching impedance is connected to the second partial discharge measurement system. The second impulse voltage input device is electrically connected to the automatic commutation module.

[0011] Preferably, the automatic commutation module includes a first commutation circuit connected to a first wiring sleeve installed inside the test chamber and a second commutation circuit connected to a second wiring sleeve installed inside the test chamber; The first commutation circuit includes a first connector connected to one end of the first impulse voltage input device and a second connector connected to one end of the first power frequency voltage input device. One end of the first connector is connected to one end of the first disconnecting switch, and one end of the second connector is connected to one end of the second disconnecting switch. The other end of the first disconnecting switch and the other end of the second disconnecting switch are connected in parallel to one end of the third disconnecting switch, the fourth disconnecting switch and the fifth disconnecting switch; The third disconnecting switch, the fourth disconnecting switch, and the fifth disconnecting switch are respectively connected to the first bushing; a first grounding switch is connected to the end of the third disconnecting switch near the first bushing, a second grounding switch is connected to the end of the fourth disconnecting switch near the first bushing, and a third grounding switch is connected to the end of the fifth disconnecting switch near the first bushing. The second commutation circuit includes a third connector connected to one end of the second impulse voltage input and a fourth connector connected to one end of the second power frequency voltage input. One end of the third connector is connected to one end of the sixth disconnect switch, and one end of the fourth connector is connected to one end of the seventh disconnect switch. The other end of the sixth disconnecting switch and the other end of the seventh disconnecting switch are connected in parallel to one end of the eighth disconnecting switch, the ninth disconnecting switch and the tenth disconnecting switch; The eighth disconnecting switch, the ninth disconnecting switch, and the tenth disconnecting switch are respectively connected to the second bushing; a fourth grounding switch is connected to the end of the eighth disconnecting switch near the second bushing, a fifth grounding switch is connected to the end of the ninth disconnecting switch near the second bushing, and a sixth grounding switch is connected to the end of the tenth disconnecting switch near the second bushing.

[0012] Preferably, the automatic data acquisition and control module includes: A pressure control unit is communicatively connected to the gas processing module. It is used to acquire pressure data from the gas processing module, generate a first control signal, and control the gas processing module to construct test conditions based on the first control signal. The process control unit is communicatively connected to the automatic commutation module and is used to generate a second control signal based on the input test plan, and control the automatic commutation module to switch the voltage circuit based on the second control signal. The processing unit is communicatively connected to the test chamber module to acquire the test data and generate test records and warning signals based on the test data.

[0013] This invention proposes a control method for a high-voltage electrical product testing system, comprising the following steps: The test product is placed inside the test chamber module and the test chamber module is connected to the automatic reversing module; The automatic acquisition and control module generates a first control signal and a second control signal based on the input test plan; the gas processing module constructs test conditions based on the first control signal; and the automatic switching module switches the voltage circuit based on the second control signal. The automatic acquisition and control module obtains the test data collected by the test chamber module and generates test records and warning signals.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects: This invention proposes a high-voltage electrical product testing system. This system integrates a test chamber module, a gas handling module, a test power supply module, an automatic switching module, and an automatic data acquisition and control module to achieve a multi-functional integrated design. It eliminates the need for separate auxiliary equipment for different tests, significantly reducing equipment redundancy and lowering investment and maintenance costs. The automatic switching module automatically switches the voltage circuit of the test product based on a second control signal, replacing the traditional method of manually changing equipment wiring or operating different equipment for different tests. In conjunction with the automatic data acquisition and control module, it generates first and second control signals according to a preset test plan, achieving fully automated control of the entire process from test condition construction, power supply, circuit switching, and data acquisition. This eliminates the need for personnel to independently operate multiple devices, significantly simplifying the test operation process and reducing the intensity and error rate of manual operation.

[0015] Furthermore, the system's automatic data acquisition and control module acquires and analyzes test data in real time, eliminating the need for manual data processing and analysis after the test, thus shortening the test cycle. In addition, the modules respond quickly and collaboratively, reducing test preparation and equipment switching time, significantly improving test efficiency. It is adaptable to various test requirements of different types of high-voltage electrical products and has strong versatility and practicality. Attached Figure Description

[0016] Figure 1 This is a connection diagram of a high-voltage electrical product testing system proposed in this invention; Figure 2 This is a schematic diagram showing the connection between the test power module and the automatic commutation module in a high-voltage electrical product testing system proposed in this invention. Figure 3 This is a flowchart of a control method for a high-voltage electrical product testing system proposed in this invention; In the attached diagram: 1. Test chamber module; 10. First wiring sleeve; 11. Circulating fan; 12. Limit switch; 13. Insulating platform; 14. Ventilation fan; 15. Gas sensor; 16. Image acquisition unit; 17. Gas density sensor; 18. Temperature sensor; 19. Opening / closing door; 110. Second wiring sleeve; 111. Test chamber; 2. Automatic reversing module; 20. First disconnecting switch; 21. Second disconnecting switch; 22. Third disconnecting switch; 23. Fourth disconnecting switch; 24. Fifth disconnecting switch; 25. First grounding switch; 26. Second grounding switch; 27. Third grounding switch; 28. Sixth disconnecting switch; 29. ​​Seventh disconnecting switch; 210. Eighth disconnecting switch; 211. Ninth disconnecting switch; 212. Tenth disconnecting switch; 213. Fourth grounding switch; 214. Fifth grounding switch 1. Close; 215. Sixth grounding switch; 216. First connector; 217. Second connector; 218. Third connector; 219. Fourth connector; 3. Gas handling module; 30. Vacuum pump; 31. Second pressure gauge; 32. Third solenoid valve; 33. Second gas guide pipe; 34. First pressure gauge; 35. First gas guide pipe; 36. Second solenoid valve; 37. SF6 gas station; 38. SF6 recovery pump; 39. First solenoid valve; 4. Test power supply module; 40. First power frequency voltage input device; 41. First impulse voltage input device; 42. First coupling capacitor; 43. First matching impedance; 44. First partial discharge measuring device; 45. Second impulse voltage input device; 46. Second coupling capacitor; 47. Second power frequency voltage input device; 48. Second matching impedance; 49. Second partial discharge measuring device. Detailed Implementation

[0017] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0018] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 this invention 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. Therefore, they should not be construed as limitations on this invention.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0023] High-voltage electrical products: High-voltage electrical products refer to the general term for electrical equipment used in power systems with rated voltages of AC 1000V and above or DC 1500V and above to realize functions such as circuit switching, control, protection, measurement, transformation, and connection. They have high insulation strength, strong arc-extinguishing capability, high dynamic and thermal stability, and high reliability, and are the core basic equipment for building modern power transmission and distribution networks. Insulation test: Insulation test refers to a series of tests conducted by applying specific voltages (or other stresses) to assess the performance and reliability of the insulation system of electrical equipment (or materials) to detect its insulation capacity and discover potential defects. Its core purpose is to ensure that the equipment can operate safely under rated voltage and overvoltage conditions without breakdown or leakage. Sealing test: The purpose of the sealing test is to prove that, at a standard ambient air temperature of 20°C, the absolute leakage rate F does not exceed the allowable leakage rate F. p The specified value.

[0024] According to current standards for high-voltage electrical products such as GB / T 11022-2020, IEC 62271-1:2017, and DL / T 593-2016, insulation testing, partial discharge testing, and sealing testing are mandatory type tests for high-voltage electrical products. During high-altitude insulation testing, due to limitations in internal insulation, most products can only be tested in climate chambers to simulate actual operating conditions. According to GB / T 16927.1-2011, when the atmospheric correction factor is less than K... t When the voltage is less than 1.0, the external insulation is subjected to excessively high voltage during the internal insulation test, often resulting in external insulation discharge and making it difficult to accurately assess the internal insulation strength of the test specimen. Furthermore, the insulation basin requires the use of tooling bushings and tooling busbars during insulation testing. If the insulation basin could be tested in an SF6-filled gas environment, the testing difficulty would be reduced. For three-phase test specimens, frequent phase switching is required during insulation testing, especially at high altitudes. Each phase test requires depressurizing the climate tank, entering the tank to change wires, and re-evacuating the gas, leading to low testing efficiency. When conducting insulation tests on 72.5kV and above high-voltage electrical products, for cases where the break-point test voltage is higher than the ground test voltage, according to GB, DL, IEC, and other standards, the preferred method is to use two reverse polarity voltage sources for combined testing. However, current technologies rely on manual wiring, resulting in long wire-changing times and the lack of automated testing systems or devices, indicating low levels of automation.

[0025] It can be seen that in the existing technology, the testing of high-voltage electrical products often requires the use of different equipment to complete conventional insulation tests, high-altitude insulation tests, SF6 gas-filled insulation tests, partial discharge tests, and sealing tests. This results in problems such as equipment redundancy, complex operation, scattered data, low testing efficiency, and insufficient intelligence. Therefore, this invention designs an automatic control system and control method for insulation testing of high-voltage electrical products, which can intelligently perform insulation and sealing tests on high-voltage electrical products to meet the relevant requirements for type testing of high-voltage electrical products in IEC, GB, and DL standards.

[0026] Currently, in the medium-voltage field, there is an intelligent control system for insulation type testing of medium-voltage switchgear, which has an automatic line-switching function. However, it can only perform insulation tests (power frequency withstand voltage test and lightning impulse withstand voltage test) on medium-voltage switchgear of 40.5kV and below. 1) Existing technology can only intelligently perform insulation tests on medium-voltage switchgear of 40.5kV and below, with a limited scope of application; 2) Existing technology can only perform conventional insulation tests (power frequency withstand voltage test and lightning impulse withstand voltage test), with limited test content; 3) Existing technology for high-altitude insulation testing relies on climate tanks and manual phase switching, requiring frequent evacuation and depressurization, resulting in low test efficiency; 4) When performing internal insulation tests on high-voltage electrical products, when K... t When the value is less than 1.0, the internal insulation test is carried out using a bushing with a higher voltage and a lower grade. The method of conducting bushing tests alone is inefficient, and when conducting insulation basin tests, the basins are connected by the test tool busbar, which is quite troublesome to install.

[0027] This invention proposes a testing system for high-voltage electrical products, such as... Figure 1 and Figure 2 As shown, the system includes a test chamber module 1, a gas processing module 3, a test power supply module 4, an automatic switching module 2, and an automatic data acquisition and control module. The test chamber module 1 is used to construct the test platform and collect test data. The gas processing module 3 is used to construct test conditions within the test platform in the test chamber module based on a first control signal. The test power supply module 4 provides power to the system. The automatic switching module 2 is used to switch the voltage circuits connected to the test products within the test platform based on a second control signal. The automatic data acquisition and control module generates control signals according to a preset test plan and acquires the test data collected in the test chamber module for real-time analysis and judgment. The control signals include a first control signal and a second control signal. This system efficiently integrates the other modules through the automatic data acquisition and control module and performs real-time analysis and judgment on the collected test data and monitoring data, achieving intelligent control of the test process. This invention greatly improves test efficiency, reduces the workload of test engineers, and enhances the enterprise's level of intelligence.

[0028] In this embodiment, the test chamber module 1 includes a test chamber 111, which is mainly made of welded steel shell. An insulating platform 13 for placing test products is provided inside the test chamber 111. A limit switch 12 is provided on the side of the insulating platform 13 inside the test chamber 111. A gas density sensor 17 and a gas sensor 15 are integrated on the test chamber 111 and are communicatively connected to the automatic acquisition and control module. The gas density sensor 17 is used to monitor the SF6 gas content leaked from the test sample during the sealing test and transmits the data to the automatic acquisition and control module. The gas sensor 15 is used to monitor the content of toxic gases such as hydrogen sulfide and carbon monoxide in the test chamber 111, and at the same time monitor the oxygen content in the air and transmit the data to the automatic acquisition and control module in real time. A circulating fan 11 is provided at the bottom of the test chamber. During the sealing test, since the molecular weight of SF6 gas is heavier than that of air, SF6 gas will settle at the bottom of the test chamber 111. The function of the circulating fan 11 is to make the SF6 gas leaked from the test sample during the test evenly distributed in the test chamber 111.

[0029] In this embodiment, the test chamber 111 is provided with an opening and closing door 19, which is also made of steel welded shell. The opening and closing door 19 is surrounded by sealing strips. An electric controller is provided on the opening and closing door 19. The electric controller is communicatively connected to the automatic acquisition and control module and controls the opening and closing of the opening and closing door 19 based on the communication signal of the automatic acquisition and control module. An image acquisition device 16 is installed inside the test chamber 111 and is connected to the automatic acquisition and control module. It is used to transmit the real-time status of the test products inside the test chamber 111 to the automatic acquisition and control module. A temperature sensor 18 is also installed inside the test chamber 111 to monitor the temperature and humidity inside the test chamber 111 in real time and transmit the data to the automatic acquisition and control module in real time.

[0030] In this embodiment, a ventilation assembly is also provided inside the test chamber 111, which includes an air exchange fan 14.

[0031] In this embodiment, the gas processing module 3 includes a first gas path and a second gas path connected to the test chamber 111; The first gas path includes a first gas guide pipe 35. One end of the first gas guide pipe 35 is connected to the interior of the test chamber 111. The other end of the first gas guide pipe 35 is connected to the inlet of the first solenoid valve 39 and the outlet of the second solenoid valve 36. The inlet of the second solenoid valve 36 is connected to the outlet of the SF6 gas station 37. The outlet of the first solenoid valve 39 is connected to the inlet of the SF6 recovery pump 38. The outlet of the SF6 recovery pump 38 is connected to the inlet of the SF6 gas station 37. The second gas path includes a second gas guide pipe 33. One end of the second gas guide pipe 33 is connected to the interior of the test chamber 111, and the other end of the second gas guide pipe 33 is connected to the outlet of the third solenoid valve 32 and the inlet of the vacuum pump 30, respectively. The first solenoid valve 39, the second solenoid valve 36, the third solenoid valve 32, the SF6 gas station 37, the SF6 recovery pump 38, and the vacuum pump 30 are all connected to the automatic acquisition and control module.

[0032] In this embodiment, a first pressure gauge 34 is installed on the first air duct 35, and a second pressure gauge 31 is installed on the second air duct 33. The first and second pressure gauges 34 and 31 are communicatively connected to the automatic acquisition and control module to monitor the pressure changes inside the test chamber 111 in real time and transmit the data to the automatic acquisition and control module. The automatic acquisition and control module uses a PID algorithm to control the first solenoid valve 39, the second solenoid valve 36, the third solenoid valve 32, the SF6 gas station 37, the SF6 recovery pump 38, and the vacuum pump 30 in a closed loop, achieving a pressure control accuracy of ±0.5%. When conducting a high-altitude insulation test, the automatic acquisition and control module calculates the test pressure based on the set simulated altitude and controls the vacuum pump 30 to start pumping air outwards, while monitoring the changes in the reading of the second pressure gauge 31. When the specified test pressure is reached, the vacuum pump 30 is shut off, and the next test begins. After the test is completed, the third solenoid valve 32 is opened, and the test chamber 111 is depressurized.

[0033] When SF6 is used for insulation testing, the automatic acquisition and control module controls the vacuum pump 30 to evacuate the test chamber 111 to a vacuum, then opens the second solenoid valve 36 to fill the test chamber 111 with SF6 gas, and monitors the change in the reading of the first pressure gauge 34 in real time. When the specified test pressure is reached, the second solenoid valve 36 is closed and the test begins. After the test is completed, the first solenoid valve 39 is opened and the SF6 recovery pump 38 is started to recover the SF6 gas to the SF6 gas station 37.

[0034] In this embodiment, the test power module 4 includes a first power supply module and a second power supply module; The first power supply module includes a first impulse voltage input device 41 and a first power frequency voltage input component; The first power frequency voltage input component includes a first power frequency voltage input device 40 and a first coupling capacitor 42. The input and output terminals of the first impulse voltage input device 41, the first power frequency voltage input device 40, and the first coupling capacitor 42 are electrically connected to the automatic commutation module. The other end of the first coupling capacitor 42 is connected to one end of a first matching impedance 43, and the other end of the first matching impedance 43 is connected to a first partial discharge measuring device 44. The first impulse voltage input device 41 is electrically connected to the automatic commutation module. The second power supply module includes a second impulse voltage input device 45 and a second power frequency voltage input component; The second power frequency voltage input component includes a second power frequency voltage input device 47 and a second coupling capacitor 46. The input and output terminals of the second impulse voltage input device 45, the second power frequency voltage input device 47, and the second coupling capacitor 46 are electrically connected to the automatic commutation module. The other end of the second coupling capacitor 46 is connected to one end of a second matching impedance 48, and the other end of the second matching impedance 48 is connected to a second partial discharge measuring device 49. The second impulse voltage input device 45 is electrically connected to the automatic commutation module.

[0035] In this embodiment, the automatic commutation module includes a first commutation circuit connected to a first wiring sleeve 10 disposed inside the test chamber 111 and a second commutation circuit connected to a second wiring sleeve 110 disposed inside the test chamber 111. The second wiring sleeve 110 is connected to a mating interface inside the test chamber 111, and has three wiring tubes (a, b, c) connected to it. The first wiring sleeve 10 is also connected to a mating interface inside the test chamber 111, and has three wiring tubes (A, B, C) connected to it. Both the first and second wiring sleeves 10 are filled with SF6 gas, and mating interfaces are provided at the bottom of both sleeves to support a head-to-head connection between the test system and the test sample, effectively avoiding corona interference between the wiring between the outlet sleeve and the test sample.

[0036] The first commutation circuit includes a first connector 216 connected to one end of the first impulse voltage input device 41 and a second connector 217 connected to one end of the first power frequency voltage input device 40. One end of the first connector 216 is connected to one end of the first disconnect switch 20, and one end of the second connector 217 is connected to one end of the second disconnect switch 21. The other ends of the first disconnect switch 20 and the other ends of the second disconnect switch 21 are connected in parallel to one end of the third disconnect switch 22, the fourth disconnect switch 23, and the fifth disconnect switch 24. The third disconnect switch 22, the fourth disconnect switch 23, and the fifth disconnect switch 24 are respectively connected to the first bushing 10. The end of the third disconnect switch 22 near the first bushing 10 is connected to the first grounding switch 25, the end of the fourth disconnect switch 23 near the first bushing 10 is connected to the second grounding switch 26, and the end of the fifth disconnect switch 24 near the first bushing 10 is connected to the third grounding switch 27.

[0037] The second commutation circuit includes a third connector 218 connected to one end of the second impulse voltage input 45 and a fourth connector 219 connected to one end of the second power frequency voltage input 47. One end of the third connector 218 is connected to one end of the sixth disconnect switch 28, and one end of the fourth connector 219 is connected to one end of the seventh disconnect switch 29. The other ends of the sixth disconnect switch 28 and the seventh disconnect switch 29 are connected in parallel to one end of the eighth disconnect switch 210, the ninth disconnect switch 211, and the tenth disconnect switch 212. The eighth disconnect switch 210, the ninth disconnect switch 211, and the tenth disconnect switch 212 are respectively connected to the second wiring sleeve 110. A fourth grounding switch 213 is connected to one end of the eighth disconnect switch 210 near the second wiring sleeve 110, a fifth grounding switch 214 is connected to one end of the ninth disconnect switch 211 near the second wiring sleeve 110, and a sixth grounding switch 215 is connected to one end of the tenth disconnect switch 212 near the second wiring sleeve 110. For example, during the A-phase lightning impulse withstand voltage test, the wiring is as follows... Figure 2 After the connections are made as shown, the automatic data acquisition and control module controls the isolating switches K1 and K2. 11 Close the circuit, apply the impulse voltage to phase A of the sample, and control K. 22 K 23 K 24 K 25 K 26 Close the circuit, ground the other phases of the test sample, and open all other switches. In this embodiment, to reduce system complexity, the second impulse voltage input device 45 and the first impulse voltage input device 41 are actually configured using a single impulse voltage input device in the circuit.

[0038] When conducting the power frequency withstand voltage test on phase A, the wiring should be as follows: Figure 2 After the connections are made as shown, the automatic data acquisition and control module controls the isolating switches K2 and K... 11 Close the circuit, connect the power frequency voltage to phase A of the test sample, and control K. 22 K 23 K 24 K 25 K 26 Close the circuit breaker, ground the other phases of the test sample, and open all other switches. During the power frequency withstand voltage test, the partial discharge signal can be monitored in real time.

[0039] When conducting the combined power frequency voltage test of phase A and phase a, the wiring should be as follows: Figure 2 After the connections are made as shown, the automatic data acquisition and control module controls the isolating switches K2, K4, and K5. 11 K 14 Close the circuit, connect the power frequency voltage to phase A and phase a of the test sample, and control K. 22 K 23 K 25K 26 Close the circuit, ground the other phases of the test sample, and open all other switches. When performing the combined impulse voltage test of phase A and phase a, the wiring should be as follows: Figure 2 After the connections are made as shown, the automatic data acquisition and control module controls the isolating switches K1, K4, and K5. 11 K 14 Close the circuit, connect the power frequency voltage to phase A and phase a of the test sample, and control K. 22 K 23 K 25 K 26 Close the circuit, grounding the other phases of the test sample, and disconnect all other switches. Specifically, K1 is the first disconnecting switch 20, K2 is the second disconnecting switch 21, and K... 11 For the third disconnecting switch 22, K 12 For the fourth disconnecting switch 23, K 13 For the fifth disconnecting switch 24, K 21 For the first grounding switch 25, K 22 For the second grounding switch 26, K 23 K3 is the third grounding switch 27, K4 is the sixth disconnecting switch 28, K5 is the seventh disconnecting switch 29, K 14 For the eighth disconnecting switch 210, K 15 For the ninth disconnecting switch 211, K 16 For the tenth disconnector switch 212, K 24 For the fourth grounding switch 213, K 25 For the fifth grounding switch 214, K 26 This is the sixth grounding switch, 215.

[0040] In this embodiment, the automatic acquisition and control module includes a pressure regulation unit, a process control unit, and a processing unit; The system includes a pressure control unit, which is communicatively connected to the gas processing module 3. The pressure control unit acquires pressure data from the gas processing module 3 to generate a first control signal, and controls the gas processing module 3 to construct test conditions based on the first control signal. A process control unit, communicatively connected to the automatic reversing module 2, generates a second control signal based on the input test plan, and controls the automatic reversing module 2 to switch voltage circuits based on the second control signal. A processing unit, communicatively connected to the test chamber module 1, acquires test data and generates test records and warning signals based on the test data.

[0041] The automatic data acquisition and control module also includes safety protection functions: these functions mainly include the following aspects: (1) When the pressure inside the test chamber 111 exceeds the limit, the automatic acquisition and control module will sound an alarm and open the third solenoid valve 32 in an emergency to activate the pressure relief function. (2) When the test chamber 111 is filled with SF6 for testing, the automatic acquisition and control module will monitor the air pressure value of the first air pressure gauge 34 in real time. When the air pressure value of the test chamber 111 decreases to 90% of the specified air pressure value, the sound and light alarm system will sound an alarm and stop the test. The test can only continue after the test engineer handles the situation and resets the alarm. (3) A limit switch 12 is installed at the bottom of the opening and closing door 19 of the test chamber 111. The test can only start when the limit switch 12 is in position. After the test starts, the opening and closing door 19 of the test chamber 111 cannot be opened, but a manual emergency stop button is provided. If an abnormal situation occurs during the test, the emergency stop button will be pressed and all test equipment will be cut off. The opening and closing door 19 can be opened in an emergency. (4) After the test, the automatic acquisition and control module monitors the content of toxic gas and oxygen in the chamber in real time through the gas density sensor 17. If the gas does not meet the entry conditions, the automatic acquisition and control module will sound an alarm and remind the test engineer to remove the sealing cover and open the ventilation components. The test engineer can also choose to open the opening and closing door 19. If the opening and closing door 19 is opened, the sound and light alarm system will broadcast a reminder not to enter. The test engineer can only enter when the gas in the test chamber 111 meets the requirements.

[0042] The present invention also proposes a control method for the above-mentioned high-voltage electrical product testing system, comprising the following steps: The test product is placed inside the test chamber module 1 and the test chamber module 1 is connected to the automatic reversing module 2.

[0043] The automatic acquisition and control module generates a first control signal and a second control signal based on the input test plan. The gas processing module 3 constructs test conditions based on the first control signal, and the automatic switching module 2 switches the voltage circuit based on the second control signal.

[0044] The automatic data acquisition and control module acquires the test data collected by the test chamber module 1 and generates test records and warning signals.

[0045] Specifically, such as Figure 3 As shown, this system is used to control the insulation test.

[0046] Install or place the test product on the insulating platform 13, and lead out the control signal of the test product operating mechanism to achieve the purpose of controlling the test product to open and close the circuit breaker outside the test chamber, and prepare the test product. After the test product is prepared, the test engineer uses a corrugated pipe to connect the outgoing bushing to each phase of the test product, or connects the test product to the interface.

[0047] The automatic acquisition and control module controls the opening and closing door 19 to close, controls the limit switch 12 to move to the designated position, and selects to perform conventional insulation test, SF6-filled insulation test, high-altitude insulation test, and partial discharge test. Select the test plan on the automatic acquisition and control module and set the test parameters, such as test altitude, SF6 relative pressure, test location, test voltage, withstand time, judgment criteria, etc. The automatic acquisition and control module controls the gas treatment module 3 to evacuate or fill the test chamber 111 with SF6 according to the test plan, and controls the automatic reversing module 2 to perform power frequency withstand voltage test, impulse withstand voltage test, impulse combined voltage test, power frequency combined voltage test, and partial discharge test on each phase of the test product. In the conventional insulation test, the automatic acquisition and control module sets the test voltage, test procedure, and test standards. The automatic switching module 2 selects the compression grounding point according to the test plan and automatically switches according to the test procedure after this part of the test is completed. In the SF6-filled insulation test, the automatic acquisition and control module sets the SF6 gas pressure, test voltage, test procedure, and test standards. Then, the automatic acquisition and control module controls the gas treatment module 3 to first evacuate the test chamber 111 according to the set SF6 gas pressure, and then fill it with SF6 gas to the specified pressure. The automatic switching module 2 selects the compression grounding point according to the test plan and automatically switches according to the test procedure after this part of the test is completed. In the high-altitude insulation test, the automatic acquisition and control module sets the SF6 gas pressure, test voltage, test procedure, and test standards. Then, the automatic acquisition and control module controls the gas treatment module 3 to first evacuate the test chamber 111 according to the set SF6 gas pressure, and then fill it with SF6 gas to the specified pressure. The automatic switching module 2 selects the compression grounding point according to the test plan and automatically switches according to the test procedure after this part of the test is completed. The automatic acquisition and control module sets the test altitude, test voltage, test procedure, and test standards. Then, the automatic acquisition and control module controls the gas treatment module 3 to simulate the altitude and air pressure according to the set test altitude. First, the test chamber 111 is evacuated to the specified air pressure. The automatic reversing module 2 selects the compression grounding point according to the test plan and automatically reverses the direction according to the test procedure after this part of the test is completed. That is, in the partial discharge test, the automatic acquisition and control module sets the test requirement value, test voltage, test procedure, and test standards. Partial discharge can be selected to be carried out together with other insulation tests. It can also be selected in other types of insulation test panels. The automatic reversing module 2 selects the compression grounding point according to the test plan and automatically reverses the direction according to the test procedure after this part of the test is completed.

[0048] The automatic data acquisition and control module determines whether the test was successful or failed based on the collected test data, i.e. whether the test product passed, and finally records the test data and generates a test record.

[0049] After the test, the automatic acquisition and control module depressurizes or returns gas to the test chamber 111 according to the test category, and determines whether the content of toxic gas in the test chamber 111 meets the conditions for personnel entry. If the conditions for entry are not met, the module reminds the operators to remove the sealing cover and turn on the ventilation fan 14. The audible and visual alarm system will prompt whether personnel can enter.

[0050] Once personnel are allowed to enter, open the door 19 of the test chamber 111 and lower the test product to the ground.

[0051] Sealing test; Install or place the test product on the insulating platform 13 and prepare the test sample.

[0052] The automatic acquisition and control module controls the door 19 to close and the limit switch 12 to move to the designated position.

[0053] Select the test plan on the automatic acquisition and control module, set the test parameters, such as test time, sample parameters, and sample leakage rate limit. After the test starts, the automatic acquisition and control module controls the circulating fan 11 to turn on and monitors the data collected by the SF6 gas density sensor 17 in real time to calculate the sample leakage rate.

[0054] Based on the calculated leakage rate of the test sample, it is compared with the required limit of leakage rate of the test sample in the test plan, and the test is judged to be successful or unsuccessful. Finally, the test data is recorded and a test record is generated.

[0055] After the test, the automatic acquisition and control module determines whether the content of toxic gas in the test chamber 111 meets the conditions for personnel entry. If the conditions are not met, the module reminds the operators to remove the sealing cover and turn on the ventilation fan 14. The audible and visual alarm system will prompt whether personnel can enter.

[0056] Once personnel are allowed to enter, open the door 19 of the test chamber 111 and lower the test product to the ground.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A high-voltage electrical product testing system, characterized in that, The system includes: The test chamber module (1) is used to construct the test platform and collect test data; The gas processing module (3) is used to construct test conditions based on a first control signal within the test platform in the test chamber module; Test power module (4) is used to provide power to the system; Automatic switching module (2) is used to switch the voltage circuit connected to the test product in the test platform based on the second control signal; An automatic acquisition and control module is used to generate control signals according to a preset test plan and to acquire test data collected in the test chamber module for real-time analysis and judgment; wherein, the control signals include the first control signal and the second control signal.

2. The high-voltage electrical product testing system according to claim 1, characterized in that, The test chamber module (1) includes a test chamber (111), an insulating platform (13) for placing the test product is provided in the test chamber (111), and a gas density sensor (17) and a gas sensor (15) are integrated on the test chamber (111) and are connected to the automatic acquisition and control module. A circulating fan (11) is installed at the bottom of the test chamber.

3. The high-voltage electrical product testing system according to claim 2, characterized in that, The test chamber (111) is equipped with an opening and closing door (19), and the opening and closing door (19) is equipped with an electric controller. The electric controller is communicatively connected to the automatic acquisition and control module and controls the opening and closing of the opening and closing door (19) based on the communication signal of the automatic acquisition and control module. The test chamber (111) is equipped with an image acquisition device (16) that is connected to the automatic acquisition and control module for transmitting the real-time status of the test products in the test chamber (111) to the automatic acquisition and control module.

4. The high-voltage electrical product testing system according to claim 2, characterized in that, The test chamber (111) is also equipped with a ventilation system, which includes an exhaust fan (14).

5. A high-voltage electrical product testing system according to claim 2, characterized in that, The gas processing module (3) includes a first gas path and a second gas path connected to the test chamber; The first gas path includes a first gas guide pipe (35), one end of the first gas guide pipe (35) is connected to the interior of the test chamber (111), and the other end of the first gas guide pipe (35) is connected to the inlet of the first solenoid valve (39) and the outlet of the second solenoid valve (36). The inlet of the second solenoid valve (36) is connected to the outlet of the SF6 gas station (37), the outlet of the first solenoid valve (39) is connected to the inlet of the SF6 recovery pump (38), and the outlet of the SF6 recovery pump (38) is connected to the inlet of the SF6 gas station (37). The second air path includes a second air guide pipe (33), one end of which is connected to the interior of the test chamber (111), and the other end of which is connected to the outlet of the third solenoid valve (32) and the inlet of the vacuum pump (30). The first solenoid valve (39), the second solenoid valve (36), the third solenoid valve (32), the SF6 gas station (37), the SF6 recovery pump (38), and the vacuum pump (30) are all connected to the automatic acquisition and control module.

6. A high-voltage electrical product testing system according to claim 5, characterized in that, A first pressure gauge (34) is provided on the first air guide tube (35), and a second pressure gauge (31) is provided on the second air guide tube (33). The second barometer (31) and the first barometer (34) are communicatively connected to the automatic data acquisition and control module.

7. The high-voltage electrical product testing system according to claim 1, characterized in that, The test power supply module includes a first power supply module and a second power supply module; The first power supply module includes a first impulse voltage input device (41) and a first power frequency voltage input component; The first power frequency voltage input component includes a first power frequency voltage input device (40) and a first coupling capacitor (42). The input and output terminals of the first impulse voltage input device (41), the first power frequency voltage input device (40), and the first coupling capacitor (42) are electrically connected to the automatic commutation module. The other end of the first coupling capacitor (42) is connected to one end of a first matching impedance (43), and the other end of the first matching impedance (43) is connected to a first partial discharge measuring device (44). The first impulse voltage input device (41) is electrically connected to the automatic commutation module. The second power supply module includes a second impulse voltage input device (45) and a second power frequency voltage input component; The second power frequency voltage input component includes a second power frequency voltage input device (47) and a second coupling capacitor (46). The input and output terminals of the second impulse voltage input device (45), the second power frequency voltage input device (47), and the second coupling capacitor (46) are electrically connected to the automatic commutation module. The other end of the second coupling capacitor (46) is connected to one end of a second matching impedance (48), and the other end of the second matching impedance (48) is connected to a second partial discharge measuring device (49). The second impulse voltage input device (45) is electrically connected to the automatic commutation module.

8. A high-voltage electrical product testing system according to claim 7, characterized in that, The automatic commutation module includes a first commutation circuit connected to a first wiring sleeve (10) installed in the test chamber and a second commutation circuit connected to a second wiring sleeve (110) installed in the test chamber; The first commutation circuit includes a first connector (216) connected to one end of the first impulse voltage input device (41) and a second connector (217) connected to one end of the first power frequency voltage input device (40). One end of the first connector (216) is connected to one end of the first disconnect switch (20), and one end of the second connector (217) is connected to one end of the second disconnect switch (21). The other end of the first disconnect switch (20) and the other end of the second disconnect switch (21) are connected in parallel to one end of the third disconnect switch (22), the fourth disconnect switch (23) and the fifth disconnect switch (24); The third disconnecting switch (22), the fourth disconnecting switch (23), and the fifth disconnecting switch (24) are respectively connected to the first bushing (10); the third disconnecting switch (22) is connected to a first grounding switch (25) at one end near the first bushing (10), the fourth disconnecting switch (23) is connected to a second grounding switch (26) at one end near the first bushing (10), and the fifth disconnecting switch (24) is connected to a third grounding switch (27) at one end near the first bushing (10); The second commutation circuit includes a third connector (218) connected to one end of the second impulse voltage input device (45) and a fourth connector (219) connected to one end of the second power frequency voltage input device (47). One end of the third connector (218) is connected to one end of the sixth disconnect switch (28), and one end of the fourth connector (219) is connected to one end of the seventh disconnect switch (29). The other end of the sixth disconnecting switch (28) and the other end of the seventh disconnecting switch (29) are connected in parallel to one end of the eighth disconnecting switch (210), the ninth disconnecting switch (211) and the tenth disconnecting switch (212); The eighth disconnecting switch (210), the ninth disconnecting switch (211), and the tenth disconnecting switch (212) are respectively connected to the second bushing (110); the eighth disconnecting switch (210) is connected to a fourth grounding switch (213) at one end near the second bushing (110), the ninth disconnecting switch (211) is connected to a fifth grounding switch (214) at one end near the second bushing (110), and the tenth disconnecting switch (212) is connected to a sixth grounding switch (215) at one end near the second bushing (110).

9. A high-voltage electrical product testing system according to claim 1, characterized in that, The automatic data acquisition and control module includes: A pressure control unit is communicatively connected to the gas processing module (3) and is used to acquire pressure data in the gas processing module (3) to generate a first control signal and control the gas processing module (3) to construct test conditions based on the first control signal. The process control unit is connected in communication with the automatic switching module (2) and is used to generate a second control signal based on the input test plan, and control the automatic switching module (2) to switch the voltage circuit based on the second control signal; The processing unit is connected to the test chamber module (1) to acquire the test data and generate test records and warning signals based on the test data.

10. A control method for a high-voltage electrical product testing system according to any one of claims 1 to 9, characterized in that, Includes the following steps: Place the test product inside the test chamber module (1) and connect the test chamber module (1) to the automatic reversing module (2); The automatic acquisition and control module generates a first control signal and a second control signal based on the input test plan. The gas processing module (3) constructs test conditions based on the first control signal. The automatic switching module (2) switches the voltage circuit based on the second control signal. The automatic acquisition and control module acquires the test data collected by the test chamber module (1) and generates test records and warning signals.

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