An on-line monitoring system and method for high voltage oil-filled insulation bushings

Abstract

The application discloses an online monitoring system suitable for high-voltage oil-filled insulation sleeves and a method thereof, relates to the technical field of online monitoring of high-voltage oil-filled insulation sleeves, and aims at solving the problem that the existing online monitoring system suitable for high-voltage oil-filled insulation sleeves is difficult for workers to detect the sleeve due to operation of the device during use. The online monitoring system suitable for high-voltage oil-filled insulation sleeves comprises an insulation sleeve, an adaptive oil cavity, an oil-gas separation system, a gas detection system, a signal analysis and processing module and a data terminal. The gas detection system and the signal acquisition and processing module mainly comprise an optoacoustic spectroscopy module, a gas pump, a gas path pressure sensor, a liquid level sensor, a gas path electromagnetic valve, a gas path micrometer filter, a main T-shaped branch and an auxiliary T-shaped branch, which are all arranged in the interior of an auxiliary fixed cabinet.

Description

Technical Field

[0001] The present invention relates to the technical field of online monitoring of high-voltage oil-filled insulating bushings, and in particular to an online monitoring system and method applicable to high-voltage oil-filled insulating bushings. Background Art

[0002] As an important part of the transformer, the high-voltage insulating bushing of the transformer will be more widely used. However, due to the relatively small size, small amount of oil, high voltage and mostly sealed state of such equipment, without explosion-proof devices, partial discharge, oil overheating, arcing in the oil, spark discharge and other faults may occur in the long-term operation. When testing the bushing, an online monitoring system suitable for high-voltage oil-filled insulating bushing will be used.

[0003] The existing online monitoring system for high-voltage oil-filled insulating bushings often has a problem in which the workers have difficulty in detecting the bushings due to the operation of the device. In response to this problem, we propose an online monitoring system and method for high-voltage oil-filled insulating bushings. Summary of the Invention

[0004] The purpose of the present invention is to provide an online monitoring system and method for high-voltage oil-filled insulating bushings, so as to solve the problem in the above background technology that the existing online monitoring system for high-voltage oil-filled insulating bushings often makes it difficult for workers to detect the bushings due to the operation of the device during use.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an online monitoring system for high-voltage oil-filled insulating bushings, comprising an oil circuit micron filter, a high-voltage oil-filled insulating bushing online monitoring system, an auxiliary fixed cabinet and a main fixed cabinet, the high-voltage oil-filled insulating bushing online monitoring system comprising an insulating bushing, an adaptable oil cavity, an oil-gas separation system, a gas detection system, a signal analysis and processing module and a data terminal, the gas detection system and the signal acquisition and processing module mainly comprise a photoacoustic spectroscopy module, an air pump, an air circuit pressure sensor, a liquid level sensor, an air circuit solenoid valve , air path micron filter, main T-shaped branch and auxiliary T-shaped branch, which are all arranged inside the auxiliary fixed cabinet, the photoacoustic spectroscopy module, air pump, air path pressure sensor, liquid level sensor, air path solenoid valve, air path micron filter, main T-shaped branch and auxiliary T-shaped branch are all sealed and connected through microporous air pipes, the sample gas in the gas detection system adopts a closed-loop operation mode in the air path, the air pipe used in the air path is a microporous air pipe with an inner diameter of 0.5mm, the signal analysis and processing module package IPAM module, IPAM module, industrial computer, microphone.

[0006] Preferably, the oil-gas separation system is mainly composed of an oil circuit micron filter, an oil solenoid valve, an oil pump, an oil chamber, an exhaust tank, a degassing module and an oil circuit heater.

[0007] Preferably, the oil solenoid valve, exhaust tank and oil chamber combination of the oil-gas separation system are installed into an integrated module, and the integrated module has an oil chamber end oil inlet and an oil chamber end oil outlet connected to the end of the adapter oil chamber, and the adapter oil chamber includes an adapter oil chamber shell, an adapter oil chamber front end and an adapter oil chamber rear end, and a stainless steel capillary is provided inside the adapter oil chamber shell, and an oil chamber end oil outlet is provided at one end inside the adapter oil chamber shell.

[0008] Preferably, an oil circuit pressure gauge is provided at one end of the oil circuit micron filter, a first oil inlet solenoid valve is provided at the other end of the oil circuit pressure gauge, an oil chamber is provided at the lower end of the first oil inlet solenoid valve, a first oil outlet solenoid valve is provided at the lower end of one side of the oil chamber, an exhaust tank is provided at the other end of the first oil outlet solenoid valve, an integrated module is provided at the upper end of one side of the exhaust tank, and an oil outlet micron filter is provided at the other end of the integrated module.

[0009] Preferably, an oil pump is provided at the lower end of one side of the oil chamber, a second oil inlet solenoid valve is provided at the other end of the oil pump, the other end of the second oil inlet solenoid valve is sealed with the oil circuit heater, a second oil outlet solenoid valve is provided at one end of the oil circuit heater, and the other end of the second oil outlet solenoid valve is sealed with the oil chamber, and a degassing module is provided at the other end of the oil circuit heater.

[0010] Preferably, an air circuit solenoid valve is provided at one end of the degassing module, an air circuit pressure gauge is provided at the other end of the air circuit solenoid valve, a main T-shaped branch is provided at the other end of the air circuit pressure gauge, auxiliary T-shaped branches are provided on both sides of the main T-shaped branch, and the auxiliary T-shaped branches are sealed to both ends of the main T-shaped branch through microporous air tubes, and an air pump is provided at the middle position of the two auxiliary T-shaped branches.

[0011] Preferably, the other end of the auxiliary T-shaped branch is sealed and connected to the photoacoustic spectroscopy module through a microporous air tube. The core component of the oil-gas separation system is the degassing module, which includes an oil chamber with a volume of 1.1 ml and an air chamber with a volume of 1 ml. An inspection cabinet cover is provided on one side of the auxiliary fixed cabinet and the main fixed cabinet. An observation glass block is provided at the upper end of the inspection cabinet cover, and a cabinet cover handle is provided below the observation glass block.

[0012] A method applicable to an online monitoring system for high-voltage oil-filled insulating bushings comprises the following steps:

[0013] Step 1: Install the online monitoring device at the casing oil outlet as required, connect the power supply, start the device, and set the detection cycle to every eight hours;

[0014] Step 2: The device starts to read the oil circuit pressure, gas circuit pressure, gas circuit liquid level signal, and exhaust valve liquid level signal. When the signal parameters all meet the set values, the first oil inlet solenoid valve, the second oil inlet solenoid valve, the second oil outlet solenoid valve and the first oil outlet solenoid valve in the normal pressure mode are opened, and the oil sample in the oil circuit is evenly mixed with the oil sample in the casing, and the oil sample circulates through the degassing membrane surface of the degassing module for degassing. At the same time, the gas circuit solenoid valve and the air pump in the gas detection system are turned on; when the oil circuit pressure exceeds the limit, the first oil inlet solenoid valve and the second oil outlet solenoid valve in the pressure overlimit mode are opened, and the oil sample in the oil chamber of the integrated module and the oil in the casing are circulated first. After a certain period of time, the first oil inlet solenoid valve and the second oil outlet solenoid valve are closed, and the second oil inlet solenoid valve and the first oil outlet solenoid valve are opened to circulate the oil sample between the integrated module-oil chamber-oil pump-degassing module. At the same time, the gas circuit solenoid valve and the air pump in the gas detection system are turned on, and the number of cycles in the pressure overlimit mode is set in advance to ensure the degassing amount;

[0015] Step 3: Based on the time it takes for the two sides of the degassing membrane to reach liquid-gas equilibrium obtained from experimental tests, the working time of the oil pump is set as the degassing time of the degassing module. When the degassing process is completed, the air pump and oil pump stop running, and the oil inlet and outlet solenoid valves and the gas circuit solenoid valve are closed;

[0016] Step 4: After degassing is completed, the sample gas enters the photoacoustic cavity of the photoacoustic spectroscopy module through a micro-air tube, and the gas is detected. The detection process takes about fifteen minutes.

[0017] Step 5: After the test is completed, the signal analysis and processing module can calculate the concentration of multi-component characteristic gases dissolved in the oil through signal processing. When the concentration of a gas exceeds the system-set warning value, the system will automatically set the detection cycle to once every two hours and issue an alarm signal;

[0018] Step 6: After the test is completed, the system will store and analyze the data of each test to diagnose the operating status and fault development trend inside the casing.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] Compared with offline detection methods, this online monitoring system for high-voltage oil-filled insulating bushings can monitor the operating status of the bushings in real time online. It adopts a combination of photoacoustic spectroscopy and membrane degassing, does not consume oil samples, does not lose sample gas, does not require carrier gas, does not require consumables, and uses automatic calibration of software algorithms. It does not require regular calibration and verification, and does not change the structure of the bushing. This solves the problem of existing online monitoring systems for high-voltage oil-filled insulating bushings that often makes it difficult for workers to detect the bushings due to the operation of the device during use.

[0021] Compared with the oil online monitoring device suitable for transformers, this online monitoring system for high-voltage oil-filled insulating bushing adopts a closed-loop operation mode for both the oil circuit and the gas circuit. After each detection cycle, there is no need to purge the exhaust gas, which can reduce the risk of oil leakage in the bushing while maintaining the good sealing of the bushing. This solves the problem of the existing online monitoring system for high-voltage oil-filled insulating bushing, which often increases the probability of gas leakage due to insufficient sealing during use.

[0022] Compared with the existing online monitoring system for high-voltage oil-filled insulating bushings, this online monitoring system for high-voltage oil-filled insulating bushings can set the detection cycle according to demand. One detection system can use a one-to-many method to detect multiple bushings, which solves the problem that the existing online monitoring system for high-voltage oil-filled insulating bushings is often difficult for staff to detect due to the inability to detect multiple bushings during use.

[0023] Compared with the existing online monitoring system for high-voltage oil-filled insulating bushings, the oil-gas separation system and gas detection system of this device are installed in two cabinets respectively, which can be flexibly installed according to the actual situation of the bushings on site, solving the problem of the existing online monitoring system for high-voltage oil-filled insulating bushings that the installation efficiency of the staff is often reduced due to the inconvenience of installation during use.

[0024] Compared to existing online monitoring systems for high-voltage oil-filled insulating bushings, this system utilizes photoacoustic spectroscopy, which does not consume the sample being tested. It offers high sensitivity and requires minimal gas volume, making it suitable for oil-poor equipment like bushings. It can detect multiple characteristic gases, including acetylene, carbon monoxide, carbon dioxide, methane, ethane, and ethylene, as required by the user. Using neural network evaluation software based on the IEC-recommended three-ratio method, it enables in-situ determination of the bushing's operating status, resolving the issue of existing online monitoring systems for high-voltage oil-filled insulating bushings, which often suffer from limited detection ranges and limited practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a front view of the overall structure of the present invention;

[0026] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0027] Figure 3 This is a detailed structural diagram of the adapting oil chamber of the present invention;

[0028] Figure 4 It is a system structure diagram of the present invention;

[0029] Figure 5Schematic diagram of the integrated module of the present invention.

[0030] In the figure: 1. Oil line micron filter; 2. Oil line pressure gauge; 3. First oil inlet solenoid valve; 4. Oil pump; 5. Second oil inlet solenoid valve; 6. Oil line heater; 7. Degassing module; 8. Second oil outlet solenoid valve; 9. Oil chamber; 10. First oil outlet solenoid valve; 11. Exhaust tank; 12. Oil outlet micron filter; 13. Liquid level sensor; 14. Gas line solenoid valve; 15. Gas line pressure gauge; 16. Main T-branch; 17. Air pump; 18. Gas line micron filter; 19. Auxiliary T-branch; 20. Photoacoustic spectroscopy module; 21. Insulation sleeve. 22. Adaptive oil chamber; 221. Adaptive oil chamber housing; 222. Stainless steel capillary tube; 223. Adaptive oil chamber front end; 224. Adaptive oil chamber rear end; 225. Oil inlet at the end of the oil chamber; 226. Oil outlet at the end of the oil chamber; 23. Oil-gas separation system; 24. Gas detection system; 25. Signal analysis and processing module; 26. Data terminal; 27. Integrated module; 28. High-voltage oil-filled insulating bushing online monitoring system; 29. ​​Inspection cabinet cover; 30. Observation glass block; 31. Cabinet cover handle; 32. Auxiliary fixed cabinet; 33. Main fixed cabinet. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] See also Figure 1-5 The present invention provides an embodiment: an online monitoring system for high-voltage oil-filled insulating bushings, comprising an oil circuit micron filter 1, a high-voltage oil-filled insulating bushing online monitoring system 28, an auxiliary fixed cabinet 32 ​​and a main fixed cabinet 33. The high-voltage oil-filled insulating bushing online monitoring system 28 comprises an insulating bushing 21, an adaptable oil cavity 22, an oil-gas separation system 23, a gas detection system 24, a signal analysis and processing module 25 and a data terminal 26. The gas detection system 24 and the signal acquisition and processing module 25 are mainly composed of a photoacoustic spectroscopy module 20, an air pump 17, an air circuit pressure sensor, a liquid level sensor 13, an air circuit solenoid valve 14, The air path micron filter 18, the main T-shaped branch 16 and the auxiliary T-shaped branch 19 are all arranged inside the auxiliary fixed cabinet 32. The photoacoustic spectroscopy module 20, the air pump 17, the air path pressure sensor, the liquid level sensor 13, the air path solenoid valve 14, the air path micron filter 18, the main T-shaped branch 16 and the auxiliary T-shaped branch 19 are all sealed and connected through microporous air pipes. The sample gas in the gas detection system adopts a closed-loop operation mode in the air path. The air pipe used in the air path is a microporous air pipe with an inner diameter of 0.5 mm. The signal analysis and processing module 25 includes an IPAM2505 module, an IPAM4017 module, an industrial computer, and a microphone.

[0033] Furthermore, the oil-gas separation system 23 is mainly composed of an oil circuit micron filter 1, an oil solenoid valve, an oil pump 17, an oil chamber 9, an exhaust tank 11, a degassing module 7, a liquid level sensor 13, and an oil circuit heater 6. The degassing membrane allows the gas dissolved in the oil to pass through the membrane into the gas chamber, while the insulating oil cannot penetrate the degassing membrane. After a period of time, the dissolved gas in the oil reaches a gas-liquid two-phase equilibrium, and the gas-liquid distribution coefficient is then corrected according to the oil temperature. This method does not consume the insulating oil in the casing, and only 200ml of oil sample is required, which has no substantial impact on the safe operation of the casing. A main T-shaped branch 16 is installed on the gas outlet side of the degassing module gas chamber. The degassed gas enters the gas detection system through two micro air tubes connected to the T-shaped branch connector. The insulation condition of the monitored equipment is diagnosed and fault warnings are issued based on the data sent back, including the concentration of the characteristic gas, oil temperature, and oil pressure. The final data is transmitted to the data terminal for display and storage via communication optical fiber, and the user can view the monitored data at any time. This system can realize early fault monitoring and early warning of bushings, with reliable monitoring effect and the ability of live online monitoring.

[0034] Furthermore, the oil solenoid valve, exhaust tank 11 and oil chamber 9 of the oil-gas separation system 23 are assembled into an integrated module 27. The integrated module 27 has an oil chamber end oil inlet 225 and an oil chamber end oil outlet 226 connected to the end of the adapting oil chamber 22. The adapting oil chamber 22 includes an adapting oil chamber housing 221, an adapting oil chamber front end 223 and an adapting oil chamber rear end 224. A stainless steel capillary tube 222 is provided inside the adapting oil chamber housing 221. The front end of the stainless steel capillary tube 222 can be inserted into the oil extraction port of the casing. The end of the stainless steel capillary tube communicates with the oil inlet 225 at the end of the oil chamber and is connected to the oil inlet pipe through a threaded joint. The other end of the oil inlet pipe is connected to the oil inlet pipe through a threaded joint. The threaded joint is connected to the oil inlet hole of the oil-gas separation system; the other oil port at the end of the oil chamber is connected to the oil outlet pipe through a threaded joint, and the other end of the oil outlet pipe is connected to the oil outlet of the oil-gas separation system through a threaded joint. The tandem design of the oil inlet and outlet ensures the circulation of the oil sample. This design can ensure that the oil sample entering and leaving the oil-gas separation system can represent the oil sample inside the casing. One end of the oil chamber housing 221 is provided with an oil chamber end oil outlet 226, an oil chamber end oil inlet 225 connected to the oil pump 4; and two ports connected to the oil chamber inlet and outlet of the degassing module 7. This integrated module 27 can make installation more convenient and compact, reducing the volume of the oil-gas separation system. The oil chamber in the integrated module 27 serves as a backup oil storage space in the event of an oil circuit anomaly, preventing the oil sample from entering the gas detection system and causing gas circuit contamination.

[0035] Furthermore, an oil circuit pressure gauge 2 is provided at one end of the oil circuit micron filter 1, a first oil inlet solenoid valve 3 is provided at the other end of the oil circuit pressure gauge 2, an oil chamber 9 is provided at the lower end of the first oil inlet solenoid valve 3, a first oil outlet solenoid valve 10 is provided at the lower end of one side of the oil chamber 9, an exhaust tank 11 is provided at the other end of the first oil outlet solenoid valve 10, an integrated module 27 is provided at the upper end of one side of the exhaust tank 11, and an oil outlet micron filter 12 is provided at the other end of the integrated module 27.

[0036] Furthermore, an oil pump 4 is provided at the lower end of one side of the oil chamber 9, and a second oil inlet solenoid valve 5 is provided at the other end of the oil pump 4. The other end of the second oil inlet solenoid valve 5 is sealedly connected to the oil circuit heater 6 and a second oil outlet solenoid valve 8 is provided at one end of the oil circuit heater 6, and the other end of the second oil outlet solenoid valve 8 is sealedly connected to the oil chamber 9 and a degassing module 7 is provided at the other end of the oil circuit heater 6.

[0037] Furthermore, an air circuit solenoid valve 14 is provided at one end of the degassing module 7, an air circuit pressure gauge 15 is provided at the other end of the air circuit solenoid valve 14, a main T-shaped branch 16 is provided at the other end of the air circuit pressure gauge 15, and auxiliary T-shaped branches 19 are provided on both sides of the main T-shaped branch 16, and the auxiliary T-shaped branches 19 are sealed to both ends of the main T-shaped branch 16 through microporous air tubes, and an air pump 17 is provided in the middle position of the two auxiliary T-shaped branches 19.

[0038] Furthermore, the other end of the auxiliary T-shaped branch 19 is sealed and connected to the photoacoustic spectroscopy module 20 through a microporous air tube. The core component of the oil-gas separation system 23 is the degassing module 7. The degassing module 7 includes an oil chamber with a volume of 1.1 ml and an air chamber with a volume of 1 ml. An inspection cabinet cover 29 is provided on one side of the auxiliary fixed cabinet 32 ​​and the main fixed cabinet 33. An observation glass block 30 is provided on the upper end of the inspection cabinet cover 29, and a cabinet cover handle 31 is provided below the observation glass block 30. The photoacoustic spectroscopy module 20 mainly includes an infrared light source, a filter, a modulation disk, and a photoacoustic cavity. After the modulated infrared light passes through the filter, the infrared light with a wavelength corresponding to the gas to be detected enters the photoacoustic cavity. Under the irradiation of the modulated infrared light of a specific wavelength, the gas to be detected is excited to generate a vibration signal that is linearly related to the gas concentration. Photoacoustic spectroscopy does not consume sample gas, requiring only a small amount to achieve high sensitivity. The released gas remains in the gas path, ensuring the device's airtightness without compromising the casing's sealing properties. Since hydrogen lacks mid-infrared absorption characteristics, it cannot be measured using mid-infrared photoacoustic spectroscopy. Instead, monitoring is performed using a hydrogen sensor. After completing one detection cycle and beginning the second, the device operates the air pump in the gas path to mix the new sample gas released from the degassing membrane with the sample gas from the previous test, achieving dynamic equilibrium between the sample gas on both sides of the oil-gas separation membrane.

[0039] A method applicable to an online monitoring system for high-voltage oil-filled insulating bushings comprises the following steps:

[0040] Step 1: Install the online monitoring device at the casing oil outlet as required, connect the power supply, start the device, and set the detection cycle to every eight hours;

[0041] Step 2: The device starts to read the oil circuit pressure, gas circuit pressure, gas circuit liquid level signal, exhaust valve liquid level signal. When the signal parameters meet the set values, the first oil inlet solenoid valve 3, the second oil inlet solenoid valve 5, the second oil outlet solenoid valve 8 and the first oil outlet solenoid valve 10 in the normal pressure mode are opened. The oil sample in the oil circuit is mixed evenly with the oil sample in the casing. The oil sample circulates through the degassing membrane surface of the degassing module 7 for degassing. At the same time, the gas circuit solenoid valve 14 and the air pump 17 in the gas detection system 24 are opened. When the oil circuit pressure exceeds the limit, the gas circuit solenoid valve 14 and the air pump 17 in the gas detection system 24 are opened. In the pressure over-limit mode, the first oil inlet solenoid valve 3 and the second oil outlet solenoid valve 8 are opened to circulate the oil sample in the oil chamber of the integrated module and the oil in the casing. After a certain period of time, the first oil inlet solenoid valve 3 and the second oil outlet solenoid valve 8 are closed, and the second oil inlet solenoid valve 5 and the first oil outlet solenoid valve 10 are opened to circulate the oil sample between the integrated module-oil chamber 9-oil pump 4-degassing module 7. At the same time, the gas circuit solenoid valve 14 and the air pump 17 in the gas detection system 24 are opened. The number of cycles in the pressure over-limit mode is set in advance to ensure the degassing amount.

[0042] Step 3: Based on the time it takes for the two sides of the degassing membrane to reach liquid-gas equilibrium obtained from experimental tests, the working time of the oil pump is set as the degassing time of the degassing module. When the degassing process is completed, the air pump and oil pump stop running, and the oil inlet and outlet solenoid valves and the gas circuit solenoid valve are closed;

[0043] Step 4: After degassing is completed, the sample gas enters the photoacoustic cavity of the photoacoustic spectroscopy module 20 through the micro-air tube, and the gas is detected. The detection process takes about fifteen minutes.

[0044] Step 5: After the detection is completed, the signal analysis and processing module 25 can calculate the concentration of the multi-component characteristic gas dissolved in the oil through signal processing. When the concentration value of a certain gas exceeds the system-set warning value, the system will automatically set the detection cycle to once every two hours and issue an alarm signal;

[0045] Step 6: After the test is completed, the system will store and analyze the data of each test to diagnose the operating status and fault development trend inside the casing.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An online monitoring system for a high-voltage oil-filled insulating bushing, comprising an insulating bushing (21), an adapting oil cavity (22), an oil-gas separation system (23), a gas detection system (24), a signal analysis and processing module (25), and a data terminal (26); the insulating bushing (21) is connected to the oil-gas separation system (23) via the adapting oil cavity (22); the oil-gas separation system (23) is arranged inside an auxiliary fixed cabinet (32); the gas detection system (24) and the signal acquisition and processing module (25) are arranged inside the auxiliary fixed cabinet (32); and the system is characterized in that: The gas detection system (24) is mainly composed of a photoacoustic spectroscopy module (20), an air pump (17), an air path pressure sensor, a liquid level sensor (13), an air path solenoid valve (14), an air path micron filter (18), a main T-shaped branch (16) and an auxiliary T-shaped branch (19) which are sealed and connected via a microporous air tube. The sample gas in the gas detection system (24) adopts a closed-loop operation mode in the air path. The air tube used in the air path is a microporous air tube with an inner diameter of 0.5 mm. The signal analysis and processing module (25) includes an IPAM2505 module, an IPAM4017 module, an industrial computer and a microphone. The oil-gas separation system (23) is mainly composed of an oil circuit micron filter (1), an oil solenoid valve, an oil pump (4), an oil chamber (9), an exhaust tank (11), a degassing module (7), and an oil circuit heater (6); an oil circuit pressure gauge (2) is provided at one end of the oil circuit micron filter (1), a first oil inlet solenoid valve (3) is provided at the other end of the oil circuit pressure gauge (2), an oil chamber (9) is provided at the lower end of the first oil inlet solenoid valve (3), a first oil outlet solenoid valve (10) is provided at the lower end of one side of the oil chamber (9), an exhaust tank (11) is provided at the other end of the first oil outlet solenoid valve (10), an integrated module (27) is provided at the upper end of one side of the exhaust tank (11), and an oil outlet micron filter (12) is provided at the other end of the integrated module (27); An oil pump (4) is provided at the lower end of one side of the oil chamber (9), a second oil inlet solenoid valve (5) is provided at the other end of the oil pump (4), the other end of the second oil inlet solenoid valve (5) is sealed and connected to the oil circuit heater (6), a second oil outlet solenoid valve (8) is provided at one end of the oil circuit heater (6), and the other end of the second oil outlet solenoid valve (8) is sealed and connected to the oil chamber (9), and a degassing module (7) is provided at the other end of the oil circuit heater (6); One end of the degassing module (7) is provided with an air circuit solenoid valve (14) via a liquid level sensor (13), the other end of the air circuit solenoid valve (14) is provided with an air circuit pressure gauge (15), the other end of the air circuit pressure gauge (15) is provided with a main T-shaped branch (16), both sides of the main T-shaped branch (16) are provided with auxiliary T-shaped branches (19), and both ends of the auxiliary T-shaped branch (19) and the main T-shaped branch (16) are sealed by microporous air tubes, and an air pump (17) is provided at the middle position of the two auxiliary T-shaped branches (19); The other end of the auxiliary T-shaped branch (19) is sealedly connected to the photoacoustic spectroscopy module (20) via a microporous air pipe, and the core component of the oil-gas separation system (23) is the degassing module (7).

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