Test device for discharging in analog switch switching oil chamber and test method thereof

Abstract

The invention discloses a test device for indoor discharge of an analog switch switching oil chamber and a test method thereof, and relates to the field of test devices for discharge, the test device comprises an oil tank, a protection plate is arranged outside the oil tank, an accident oil pool is arranged on the side edge of the protection plate, and a power supply assembly and a measurement assembly are installed on the outer wall of the protection plate. A high-speed camera is installed at the top of the protection plate, and a remote control water gun and a dry powder fire extinguishing device are installed at the top of the inner wall of the protection plate. According to the test device for simulating internal discharge of the switch switching oil chamber and the test method thereof, different tap switch oil chambers and pressure relief valves can be quickly replaced through the detachable tap switch oil chambers, so that the test efficiency can be remarkably improved, the research and development cycle can be shortened, and the test efficiency can be greatly improved through injection of the oil tank and short-circuit current. Energy and pressure impact of arc discharge in an oil chamber are accurately simulated, and real working condition data are provided for valve design.

Description

Technical Field

[0001] The present invention relates to the field of test devices for discharging, and particularly relates to a test device for simulating switch switching and discharging in an oil chamber and a test method thereof. Background Art

[0002] In a high-voltage direct current transmission system, a tap changer of a converter transformer is a core device for voltage regulation. The arc discharge caused by a fault current in its oil chamber will cause a sharp increase in the internal pressure. If the pressure relief valve is not reasonably designed or the mechanical strength is insufficient, it may cause the oil chamber to burst, transformer oil to splash, or even catch fire and explode, seriously threatening the safety of the power grid.

[0003] Traditional test devices can only be used for a single model of tap changer or pressure relief valve, and cannot quickly switch between different brands for improvement according to the test results. Moreover, it is difficult to reproduce the real environment of the internal short-circuit arc in the transformer oil chamber in the laboratory, resulting in insufficient design verification of the pressure relief valve. At the same time, traditional tests are prone to fires or oil leakage caused by the bursting of the oil chamber, threatening the safety of personnel and equipment. During the test, existing tests only focus on a single parameter and cannot comprehensively analyze the effects of faults on mechanical strength, temperature rise, and vibration.

[0004] Therefore, it is necessary to propose a test device for simulating switch switching and discharging in an oil chamber and a test method thereof to solve the above problems. Summary of the Invention

[0005] The main purpose of the present invention is to provide a test device for simulating switch switching and discharging in an oil chamber and a test method thereof, which can effectively solve the problems in the background art.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A test device for simulating switch switching and discharging in an oil chamber includes an oil tank, a protective plate is arranged outside the oil tank, an accident oil pool is arranged on the side of the protective plate, a power supply component and a measurement component are installed on the outer wall of the protective plate, a high-speed camera is installed on the top of the protective plate, and a remote control water gun and a dry powder fire extinguishing device are installed on the top of the inner wall of the protective plate;

[0008] An oil drain pool is installed at the bottom of the oil tank, two sides of the top of the oil drain pool are symmetrically flange-connected with tap changer oil chambers, the top of the tap changer oil chamber is flange-connected with a pressure relief valve, two sides of the bottom of the oil drain pool are symmetrically installed with pulley seats, and two sides of the bottom of the inner cavity of the protective plate are symmetrically movably connected with positioning components;

[0009] A control component is installed on the outer wall of the protective plate, and the control component includes a power supply module, a measurement module, a protection module, and a data processing module.

[0010] Preferably, one side of the protection plate is detachable. There are six remote control water guns, three of which are in a group. Each group of remote control water guns is symmetrically installed at the top of both sides inside the protection plate cavity. There are two dry powder fire extinguishing devices, and the two dry powder fire extinguishing devices are symmetrically installed at the top of both sides inside the protection plate cavity. There are two high-speed cameras, and the two high-speed cameras are symmetrically installed on both sides of the top of the protection plate.

[0011] Preferably, an oil pipeline is installed at the bottom of the side of the protection plate. One side of the oil pipeline is connected to the accident oil pool, and the other side of the oil pipeline is installed on the outer wall of the oil discharge pool.

[0012] Preferably, wires are symmetrically installed on both sides of the power supply component and the measurement component. A bushing is installed on the side of the tap-changer oil chamber. The wire is connected to the bushing, and the other end of the bushing is connected to the tap-changer oil chamber.

[0013] Preferably, the power supply component includes four short-circuit generators connected in parallel, nine intermediate transformers and a circuit breaker. The measurement component includes a voltage divider, a current divider, a low-inductance shunt, a temperature rise meter, and a vibration sensor. The power supply component is used to supply power to the tap-changer oil chamber and the oil tank. The measurement component cooperates with the pressure sensor to monitor and test the states of the tap-changer oil chamber and the oil tank.

[0014] Preferably, a fire blanket is installed at the bottom of the inside of the protection plate. Guide grooves are symmetrically opened on both sides of the protection plate. The pulley seat is movably connected to the inside of the guide groove. Activity grooves are symmetrically opened on both sides of the top of the protection plate, and the inside cavities of the two activity grooves are communicated with each other.

[0015] Preferably, a lead screw is rotatably connected to the inside of the bottom of the protection plate. A turning handle is installed at the bottom of the outer wall of the protection plate, and the turning handle is connected to the lead screw. Positioning blocks are symmetrically installed on the opposite sides of the tops of the two positioning components. The positioning blocks are attached to the side of the oil discharge pool. The opposite sides of the bottoms of the two positioning components are symmetrically movably connected to the inside cavities of the two activity grooves and are threadedly connected to the outer wall of the lead screw.

[0016] Preferably, the power module includes a current regulation module. The output end of the current regulation module is electrically connected to the input ends of a short-circuit current application module and a discharge simulation module. The measurement module includes a voltage divider measurement module, a shunt measurement module, a pressure sensor measurement module, a vibration sensor measurement module, a camera image measurement module, a liquid level sensor measurement module, and a flame sensor measurement module. The output end of the measurement module is electrically connected to the input end of the protection module. The output ends of the power module and the measurement module are electrically connected to the input end of the data processing module.

[0017] Preferably, the data processing module includes a pressure peak recording module, a temperature rise curve recording module, a vibration frequency recording module, an arc morphology analysis module, and an oil chamber bursting analysis module. The output ends of the pressure peak recording module, the temperature rise curve recording module, the vibration frequency recording module, the arc morphology analysis module, and the oil chamber bursting analysis module are electrically connected to the input end of a comparison module, and the output end of the comparison module is electrically connected to the input end of an optimization scheme formulation module.

[0018] A test method for simulating switch switching and discharging in an oil chamber includes the following operating steps:

[0019] S1: Remove one detachable protective plate, align the pulley seat at the bottom of the oil drain tank with the guide groove, install the oil drain tank together with the oil tank and the tap-changer oil chamber in the inner cavity of the protective plate, rotate the turning handle to drive the lead screw to rotate in the inner cavity of the movable groove, so that the bottom of the positioning component can be threadedly connected to the lead screw, and the positioning component can drive the positioning block to move until it fits on both sides of the oil drain tank to fix it.

[0020] S2: Start the power supply component to drive four short-circuit generators to work and operate them in synchronous parallel, then start nine transformers to output in parallel, adjust them to the target current through the current adjustment module, close the circuit breaker, and apply a short-circuit current to the tap-changer oil chamber through the short-circuit current application module.

[0021] S3: Simulate the discharge in the tap-changer oil chamber through the discharge simulation module, trigger arc discharge, and at the same time start a high-speed camera to capture the transient process of the arc. Monitor the states of the tap-changer oil chamber and the oil tank through the voltage divider measurement module, the shunt measurement module, the pressure sensor measurement module, the vibration sensor measurement module, the camera image measurement module, the liquid level sensor measurement module, and the flame sensor measurement module. At the same time, record the pressure peak, the temperature rise curve, and the vibration frequency through the pressure peak recording module, the vibration frequency recording module, and the oil chamber bursting analysis module.

[0022] S4: Monitor the liquid level of the oil drain tank through the liquid level sensor measurement module to prevent oil spillage. When abnormal flame and pressure are detected through the sensor, start the protection module and perform safety protection treatment through the remote control water gun and the dry powder fire extinguishing device.

[0023] S5: After the above operations are completed, drain the oil in the oil drain tank into the accident oil tank through the oil pipeline for collection, and take a sample for chromatographic analysis after cooling.

[0024] S6: Compare the data collected by the temperature rise curve recording module, the arc morphology analysis module, the pressure peak recording module, the vibration frequency recording module, and the oil chamber bursting analysis module. Compare with the existing data through the comparison module, and then formulate an optimization plan for the tap-changer oil chamber and the fuel tank through the optimization plan formulation module.

[0025] Compared with the prior art, the present invention provides a test device and a test method for simulating discharge in a tap-changer oil chamber, having the following beneficial effects:

[0026] 1. For the test device and the test method for simulating discharge in a tap-changer oil chamber, through the detachable tap-changer oil chamber, different tap-changer oil chambers and pressure relief valves can be quickly replaced. Based on this, the test efficiency can be significantly improved, the R & D cycle can be reduced, and through the injection of the fuel tank and short-circuit current, the energy and pressure impact of the arc discharge in the oil chamber can be accurately simulated, providing real working condition data for valve design.

[0027] 2. For the test device and the test method for simulating discharge in a tap-changer oil chamber, through the provided protective plate and fireproof blanket, during the test, the phenomenon that personnel and equipment are damaged due to accidents can be effectively avoided. During the test, the pressure, temperature, vibration and arc morphology can be monitored synchronously. Combined with the oil sample chromatographic analysis, it provides a comprehensive basis for the mechanical design and fireproof performance improvement of the pressure relief valve. Description of the Drawings

[0028] Figure 1 is the overall structural schematic diagram of the present invention;

[0029] Figure 2 is the structural schematic diagram of the fuel tank of the present invention;

[0030] Figure 3 is the structural schematic diagram of the bottom of the protective plate of the present invention;

[0031] Figure 4 is the system block diagram of the main control unit of the present invention;

[0032] Figure 5 is the system block diagram of the data processing module of the present invention.

[0033] In the figure: 1. Protection board; 2. Oil pipeline; 3. Accident oil pool; 4. Power supply component; 5. Measurement component; 6. Wire; 7. Control component; 8. Dry powder fire extinguishing device; 9. Remote control water gun; 10. High-speed camera; 11. Flame sensor; 12. Tap changer oil chamber; 13. Pressure relief valve; 14. Transparent window; 15. Pressure sensor; 16. Bushing; 17. Oil tank; 18. Oil drain pool; 19. Liquid level sensor; 20. Fire blanket; 21. Pulley seat; 22. Guide groove; 23. Rotating handle; 24. Positioning component; 25. Positioning block; 26. Movable groove; 27. Lead screw. Detailed implementation mode

[0034] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation modes.

[0035] Embodiment 1:

[0036] As Figure 1 、 Figure 2 shown, a test device for simulating discharge in a tap changer oil chamber includes an oil tank 17. A protection board 1 is arranged outside the oil tank 17. An accident oil pool 3 is arranged on the side of the protection board 1. A power supply component 4 and a measurement component 5 are installed on the outer wall of the protection board 1. A high-speed camera 10 is installed on the top of the protection board 1. A remote control water gun 9 and a dry powder fire extinguishing device 8 are installed on the top of the inner wall of the protection board 1. One side of the protection board 1 is detachable. There are six remote control water guns 9, with three remote control water guns 9 in a group. Each group of remote control water guns 9 is symmetrically installed on the top of both sides of the inner cavity of the protection board 1. There are two dry powder fire extinguishing devices 8, and the two dry powder fire extinguishing devices 8 are symmetrically installed on the top of both sides of the inner cavity of the protection board 1. There are two high-speed cameras 10, and the two high-speed cameras 10 are symmetrically installed on both sides of the top of the protection board 1. An oil pipeline 2 is installed at the bottom of the side of the protection board 1. One side of the oil pipeline 2 is connected to the accident oil pool 3, and the other side of the oil pipeline 2 is installed on the outer wall of the oil drain pool 18. Wires 6 are symmetrically installed on both sides of the power supply component 4 and the measurement component 5. A bushing 16 is installed on the side of the tap changer oil chamber 12. The wire 6 is connected to the bushing 16, and the other end of the bushing 16 is connected to the tap changer oil chamber 12. The power supply component 4 includes four short-circuit generators connected in parallel, nine intermediate transformers and a circuit breaker. The measurement component 5 includes a voltage divider, a current divider, a low-inductance shunt, a temperature rise meter, and a vibration sensor. The power supply component 4 is used to supply power to the tap changer oil chamber 12 and the oil tank 17. The measurement component 5 cooperates with the pressure sensor 15 to monitor and test the states of the tap changer oil chamber 12 and the oil tank 17.

[0037] Embodiment 2:

[0038] As Figures 1 - 3As shown in the figure, a test device for simulating switch switching and discharging in an oil chamber. At the bottom of the oil tank 17, an oil drain pool 18 is installed. On both sides of the top of the oil drain pool 18, a tap-changer oil chamber 12 is symmetrically flange-connected. At the top of the tap-changer oil chamber 12, a pressure relief valve 13 is flange-connected. On both sides of the bottom of the oil drain pool 18, pulley seats 21 are symmetrically installed. On both sides of the bottom of the inner cavity of the protective plate 1, positioning components 24 are symmetrically and movably connected. At the bottom of the inner cavity of the protective plate 1, a fire blanket 20 is installed. On both sides of the protective plate 1, guide grooves 22 are symmetrically opened. The pulley seats 21 are movably connected in the inner cavity of the guide grooves 22. On both sides of the top of the protective plate 1, movable grooves 26 are symmetrically opened. The inner cavities of the two movable grooves 26 are communicated. In the inner cavity of the bottom of the protective plate 1, a lead screw 27 is rotatably connected. At the bottom of the outer wall of the protective plate 1, a turning handle 23 is installed. The turning handle 23 is connected to the lead screw 27. On the relatively side of the tops of the two positioning components 24, positioning blocks 25 are symmetrically installed. The positioning blocks 25 are attached to the side of the oil drain pool 18. On the opposite sides of the bottoms of the two positioning components 24, they are symmetrically and movably connected in the inner cavities of the two movable grooves 26 and are threadedly connected to the outer wall of the lead screw 27.

[0039] Embodiment Three:

[0040] As Figure 1 、 Figure 4 、 Figure 5 shown in the figure, a test device for simulating switch switching and discharging in an oil chamber. On the outer wall of the protective plate 1, a control component 7 is installed. The control component 7 includes a power supply module, a measurement module, a protection module, and a data processing module. The power supply module includes a current adjustment module. The output end of the current adjustment module is electrically connected to the input ends of a short-circuit current application module and a discharge simulation module. The measurement module includes a voltage divider measurement module, a shunt measurement module, a pressure sensor measurement module, a vibration sensor measurement module, a camera image measurement module, a liquid level sensor measurement module, and a flame sensor measurement module. The output end of the measurement module is electrically connected to the input end of the protection module. The output ends of the power supply module and the measurement module are electrically connected to the input end of the data processing module. The data processing module includes a pressure peak recording module, a temperature rise curve recording module, a vibration frequency recording module, an arc morphology analysis module, and an oil chamber bursting analysis module. The output ends of the pressure peak recording module, the temperature rise curve recording module, the vibration frequency recording module, the arc morphology analysis module, and the oil chamber bursting analysis module are electrically connected to the input end of a comparison module. The output end of the comparison module is electrically connected to the input end of an optimization plan formulation module.

[0041] Embodiment Four:

[0042] A test method for simulating switch switching and discharging in an oil chamber includes the following operation steps:

[0043] S1: Remove one detachable protective plate 1, align the pulley seat 21 at the bottom of the oil drain tank 18 with the guide groove 22, install the oil drain tank 18 together with the fuel tank 17 and the tap-changer oil chamber 12 in the inner cavity of the protective plate 1, rotate the turning handle 23 to drive the lead screw 27 to rotate in the inner cavity of the movable groove 26, so that the bottom of the positioning assembly 24 can be threadedly connected to the lead screw 27, and the positioning assembly 24 can drive the positioning block 25 to move until it fits on both sides of the oil drain tank 18 to fix it;

[0044] S2: Start the power supply assembly 4 to drive four short-circuit generators to work and operate them in synchronous parallel, then start nine transformers to output in parallel, adjust them to the target current through the current adjustment module, close the circuit breaker, and apply a short-circuit current to the tap-changer oil chamber 12 through the short-circuit current application module;

[0045] S3: Conduct a discharge simulation on the tap-changer oil chamber 12 through the discharge simulation module to trigger arc discharge. At the same time, start the high-speed camera 10 to capture the transient process of the arc. Monitor the states of the tap-changer oil chamber 12 and the fuel tank 17 through the voltage divider measurement module, shunt measurement module, pressure sensor measurement module, vibration sensor measurement module, camera image measurement module, liquid level sensor measurement module, and flame sensor measurement module. At the same time, record the pressure peak value, temperature rise curve, and vibration frequency through the pressure peak value recording module, vibration frequency recording module, and oil chamber bursting analysis module;

[0046] S4: Monitor the liquid level of the oil drain tank 18 through the liquid level sensor measurement module to prevent oil spillage. When flames and abnormal pressures are detected through the sensors, start the protection module and conduct safety protection through the remote control water gun 9 and the dry powder fire extinguishing device 8;

[0047] S5: After the above operations are completed, drain the oil in the oil drain tank 18 into the accident oil pool 3 through the oil pipeline 2 for collection, and take a sample for chromatographic analysis after cooling;

[0048] S6: Compare the data collected by the temperature rise curve recording module, arc shape analysis module, pressure peak value recording module, vibration frequency recording module, and oil chamber bursting analysis module, and compare with the existing data through the comparison module, so as to formulate an optimization plan for the tap-changer oil chamber 12 and the fuel tank 17 through the optimization plan formulation module.

[0049] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have various changes and improvements, and these changes and improvements fall within the scope of the present invention as claimed. The scope of the present invention as claimed is defined by the appended claims and their equivalents.

Claims

1. A test device for simulating the discharge in the oil chamber during the switching of a simulated switch, comprising an oil tank (17), characterized in that: A protective plate (1) is arranged outside the fuel tank (17). An accident oil pool (3) is arranged on the side of the protective plate (1). A power supply assembly (4) and a measurement assembly (5) are installed on the outer wall of the protective plate (1). A high-speed camera (10) is installed on the top of the protective plate (1). A remote control water gun (9) and a dry powder fire extinguishing device (8) are installed on the top of the inner wall of the protective plate (1); An oil drain pool (18) is installed at the bottom of the fuel tank (17). Two sides of the top of the oil drain pool (18) are symmetrically flange-connected with a tap-changer oil chamber (12). The top of the tap-changer oil chamber (12) is flange-connected with a pressure relief valve (13). Two sides of the bottom of the oil drain pool (18) are symmetrically provided with pulley seats (21). Two sides of the bottom of the inner cavity of the protective plate (1) are symmetrically movably connected with a positioning assembly (24); A control assembly (7) is installed on the outer wall of the protective plate (1). The control assembly (7) includes a power supply module, a measurement module, a protection module and a data processing module.

2. The test device for simulating the discharge in the oil chamber by switching the analog switch according to claim 1, wherein: One side of the protective plate (1) is detachable. There are six remote control water guns (9). Three remote control water guns (9) are in a group. Each group of remote control water guns (9) is symmetrically installed on the top of both sides of the inner cavity of the protective plate (1). There are two dry powder fire extinguishing devices (8). The two dry powder fire extinguishing devices (8) are symmetrically installed on the top of both sides of the inner cavity of the protective plate (1). There are two high-speed cameras (10). The two high-speed cameras (10) are symmetrically installed on both sides of the top of the protective plate (1).

3. An experimental device for simulating switching of oil chamber discharge by a switch, characterized in that: An oil pipeline (2) is installed at the bottom of the side of the protective plate (1). One side of the oil pipeline (2) is connected with the accident oil pool (3). The other side of the oil pipeline (2) is installed on the outer wall of the oil drain pool (18).

4. The test device for simulating discharge in an oil chamber by switching a simulation switch according to claim 1, wherein: Wires (6) are symmetrically installed on both sides of the power supply assembly (4) and the measurement assembly (5). A bushing (16) is installed on the side of the tap-changer oil chamber (12). The wire (6) is connected with the bushing (16). The other end of the bushing (16) is connected with the tap-changer oil chamber (12).

5. The test device for simulating switching of internal discharge in an oil chamber according to claim 1, characterized in that: The power supply assembly (4) includes four short-circuit generators connected in parallel, nine intermediate transformers and a circuit breaker. The measurement assembly (5) includes a voltage divider, a current divider, a low-inductance shunt, a temperature rise meter and a vibration sensor. The power supply assembly (4) is used to supply power to the tap-changer oil chamber (12) and the fuel tank (17). The measurement assembly (5) cooperates with a pressure sensor (15) to monitor and test the states of the tap-changer oil chamber (12) and the fuel tank (17).

6. The test device for simulating discharge in the oil chamber by switching the analog switch according to claim 1, wherein: A fireproof blanket (20) is installed at the bottom of the inner cavity of the protective plate (1). Guide grooves (22) are symmetrically formed on both sides of the protective plate (1). The pulley seats (21) are movably connected in the inner cavities of the guide grooves (22). Movable grooves (26) are symmetrically formed on both sides of the top of the protective plate (1). The inner cavities of the two movable grooves (26) are communicated with each other.

7. An experimental device for simulating discharge in an oil chamber by switching a analog switch, characterized in that: A lead screw (27) is rotatably connected in the inner cavity at the bottom of the protective plate (1). A turning handle (23) is installed at the bottom of the outer wall of the protective plate (1). The turning handle (23) is connected to the lead screw (27). On the opposite sides of the tops of the two positioning components (24), positioning blocks (25) are symmetrically installed. The positioning blocks (25) are attached to the sides of the oil drain sump (18). The opposite sides of the bottoms of the two positioning components (24) are symmetrically and movably connected in the inner cavities of the two moving grooves (26) and are threadedly connected to the outer wall of the lead screw (27).

8. An experimental device for simulating discharge in an oil chamber by switching a analog switch, characterized in that: The power supply module includes a current regulation module. The output end of the current regulation module is electrically connected to the input ends of a short-circuit current application module and a discharge simulation module. The measurement module includes a voltage divider measurement module, a shunt measurement module, a pressure sensor measurement module, a vibration sensor measurement module, a camera image measurement module, a liquid level sensor measurement module, and a flame sensor measurement module. The output end of the measurement module is electrically connected to the input end of the protection module. The output ends of the power supply module and the measurement module are electrically connected to the input end of the data processing module.

9. An experimental device for simulating switching of oil chamber discharge of a switch, characterized in that: The data processing module includes a pressure peak recording module, a temperature rise curve recording module, a vibration frequency recording module, an arc shape analysis module, and an oil chamber bursting analysis module. The output ends of the pressure peak recording module, the temperature rise curve recording module, the vibration frequency recording module, the arc shape analysis module, and the oil chamber bursting analysis module are electrically connected to the input end of a comparison module. The output end of the comparison module is electrically connected to the input end of an optimization plan formulation module.

10. A test method for simulating switch switching and internal discharge in oil, using a test device for simulating switch switching and internal discharge in oil according to any one of claims 1-9 above, characterized in that: It includes the following operating steps: S1: Remove one detachable protective plate (1). Align the pulley seat (21) at the bottom of the oil drain sump (18) with the guide groove (22). Install the oil drain sump (18) together with the fuel tank (17) and the tap-changer oil chamber (12) in the inner cavity of the protective plate (1). Rotate the turning handle (23) to drive the lead screw (27) to rotate in the inner cavity of the moving groove (26), so that the bottom of the positioning component (24) can be threadedly connected to the lead screw (27), and the positioning component (24) can drive the positioning block (25) to move until it is attached to both sides of the oil drain sump (18) to fix it. S2: Start the power supply component (4) to drive four short-circuit generators to work and operate them in synchronous parallel. Then start nine transformers and make them output in parallel. Adjust the current to the target current through the current regulation module. Close the circuit breaker and apply a short-circuit current to the tap-changer oil chamber (12) through the short-circuit current application module. S3: The tap-changer oil chamber (12) is subjected to discharge simulation by the discharge simulation module to trigger arc discharge. Meanwhile, the high-speed camera (10) is started to capture the transient process of the arc. The states of the tap-changer oil chamber (12) and the oil tank (17) are monitored by the voltage divider measurement module, shunt measurement module, pressure sensor measurement module, vibration sensor measurement module, camera image measurement module, liquid level sensor measurement module and flame sensor measurement module. Meanwhile, the pressure peak value, temperature rise curve and vibration frequency are recorded by the pressure peak recording module, vibration frequency recording module and oil chamber bursting analysis module; S4: The liquid level of the oil drain pit (18) is monitored by the liquid level sensor measurement module to prevent oil spillage. When flame and pressure anomalies are detected by the sensors, the protection module is started, and safety protection is carried out through the remote control water gun (9) and dry powder fire extinguishing device (8); S5: After the above operations are completed, the oil in the oil drain pit (18) is drained into the accident oil pool (3) through the oil pipeline (2) for collection, and samples are taken after cooling for chromatographic analysis; S6: Based on the data collected by the temperature rise curve recording module, arc shape analysis module, pressure peak recording module, vibration frequency recording module and oil chamber bursting analysis module, comparisons are made. The comparisons are made with the existing data through the comparison module, so as to formulate an optimization plan for the tap-changer oil chamber (12) and the oil tank (17) through the optimization plan formulation module.

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