A grounding resistance reduction device for an oil-immersed transformer and a method of using the same

Abstract

A grounding resistance reduction device for an oil-immersed transformer and its use method are provided. The device is disposed on one side of the body of the oil-immersed transformer. The oil-immersed transformer is provided with a grounding wire connected to a grounding electrode inserted into the ground. A resistance reduction device is provided directly above the grounding electrode. The resistance reduction device includes a rainwater collection tank located above the ground, a conductive material chamber disposed therein, and multiple liquid distribution pipes connected to the rainwater collection tank. The multiple liquid distribution pipes are inserted underground and positioned around the grounding electrode. The liquid distribution pipes are provided with multiple liquid outlets facing the grounding electrode. A soil monitoring unit is disposed below the liquid distribution pipes. A first automatic discharge valve is disposed below the rainwater collection tank, which includes a water level monitoring unit. The first automatic discharge valve has a liquid outlet located at the bottom. The upper portions of the multiple liquid distribution pipes are all connected to the liquid outlet. The present invention discharges rainwater from the rainwater collection tank through the first automatic discharge valve, allowing the rainwater to flow through the multiple liquid distribution pipes to the vicinity of the grounding electrode, thereby increasing the conductivity of the soil.

Description

Technical Field

[0001] The present invention relates to the technical field of oil-immersed transformers, and in particular to a grounding resistance reduction device for an oil-immersed transformer and a use method thereof. Background Art

[0002] Grounding of oil-immersed transformers is crucial for their safe operation. Its primary purpose is to ensure that the transformer's metal casing and internal components maintain a safe potential under both normal and fault conditions. Grounding of oil-immersed transformers typically involves conducting electricity to the earth via a ground wire and a connected grounding electrode.

[0003] Over long-term use, the conductivity of the soil near the grounding electrode gradually decreases, increasing the grounding resistance and posing a safety hazard to the operation of oil-immersed transformers. Existing methods for increasing soil conductivity include spreading salt near the grounding electrode or injecting water or salt water into the soil to increase soil conductivity.

[0004] However, this method is not easy to control the salt content. If the salt content is low, the effect of improving soil conductivity is not obvious, and if the salt content is high, it will lead to salinization. Moreover, this method of adding salt in the later stage is more complicated to operate. The salt water needs to be mixed in advance and transported to the destination. If it is in the outdoor suburbs, transportation is more inconvenient, and the grounding electrode is located deep underground. It is not easy for salt water to penetrate to the vicinity of the underground grounding electrode, which also affects the conductivity of the soil. Summary of the Invention

[0005] In order to solve the technical problems existing in the above-mentioned background technology, the present invention provides a grounding resistance reduction device for an oil-immersed transformer and a method for using the same.

[0006] The technical solutions of the present invention are as follows:

[0007] A grounding resistance reduction device for an oil-immersed transformer is provided on one side of the body of the oil-immersed transformer. The oil-immersed transformer is provided with a grounding wire connected to a grounding electrode inserted into the ground. The resistance reduction device is provided directly above the grounding electrode. The resistance reduction device includes a rainwater collection tank located above the ground, a conductive material chamber disposed therein, and a plurality of liquid distribution pipes connected to the rainwater collection tank. The plurality of liquid distribution pipes are inserted underground and positioned around the grounding electrode. The liquid distribution pipes are provided with a plurality of liquid outlet holes facing the grounding electrode. A soil monitoring unit is provided below the liquid distribution pipes.

[0008] A first automatic discharge valve is provided at the lower part of the rainwater collection tank, in which a water level monitoring unit is provided. The first automatic discharge valve has a liquid outlet at the lower part, and the upper parts of the multiple liquid distribution pipes are all connected to the liquid outlet;

[0009] The conductive material chamber is located at the upper part of the inner side of the rainwater collection tank, a second automatic discharge valve is provided at the lower part of the conductive material chamber, and a drainage hole is provided on one side of the rainwater collection tank below the discharge port of the second automatic discharge valve;

[0010] A filter assembly is provided on the upper portion of the rainwater collection tank, and a stirring assembly is provided inside the tank. The stirring assembly includes a first stirring shaft and a first stirring blade provided thereon. The first stirring shaft passes through the drain hole in a horizontal direction and is rotatably connected to the rainwater collection tank. One end of the first stirring shaft extends to the outside of the rainwater collection tank and is provided with a first stirring shaft driving member. The first stirring shaft driving member can be a first windmill, which drives the first stirring shaft and the first stirring blade to rotate by external wind power, thereby stirring and mixing the rainwater and the conductive material.

[0011] The soil monitoring unit, the first automatic discharge valve and the second automatic discharge valve are electrically connected to an external control module respectively.

[0012] A plurality of distribution pipes are arranged under the rainwater collection pool, and the distribution pipes are vertically distributed around the grounding electrode. The rainwater collection pool is used to collect rainwater. When the soil monitoring unit detects that the electrical conductivity of the soil is low, which will reduce the safety of the oil-immersed transformer, the rainwater collected in the rainwater collection pool is mixed with the conductive medium (such as salt) discharged from the conductive material room to form a conductive solution. The first automatic discharge valve flows the conductive solution into the soil through the outlet hole of the distribution pipe, so that the conductivity of the soil near the grounding electrode is increased and the resistance is reduced, so that the oil-immersed transformer can operate safely and stably. This method of improving soil conductivity is simple and can make rational use of rainwater.

[0013] In order to prevent the conductive material from clumping in the conductive material chamber and preventing it from flowing out of the discharge port smoothly, a second stirring shaft parallel to the first stirring shaft is provided in the conductive material chamber, and a second stirring blade is provided on the second stirring shaft. The second stirring shaft passes through the conductive material chamber and the rainwater collection tank, and is connected to the second stirring shaft driving member outside the rainwater collection tank. The second stirring shaft driving member can be a second windmill, which can rotate under the drive of wind all day long, and then drive the second stirring blade to rotate through the second stirring shaft, thereby breaking up the solid particles of the conductive material.

[0014] The specific structure of the above-mentioned leakage hole is that the leakage hole includes a central hole and multiple through holes arranged along its periphery. The first stirring shaft is connected to the central hole through a bearing sleeved thereon. The multiple through holes can discharge excess rainwater collected in the rainwater collection pool to prevent rainwater from flooding the discharge port of the second automatic discharge valve.

[0015] In order to reduce the mutual interference between the first stirring shaft driving member and the second stirring shaft driving member during rotation, the first stirring shaft driving member and the second stirring shaft driving member are arranged in an upper and lower staggered manner.

[0016] Regarding the structure of the first stirring shaft driving component, the first stirring shaft driving component includes a first windmill, and the second stirring shaft driving component includes a second windmill. The blade length of the first windmill is greater than the blade length of the second windmill, and the vertical spacing between the first windmill and the second windmill in the horizontal direction is greater than 2 times the blade length of the first windmill. By using wind energy to drive the corresponding stirring shafts to rotate by the first windmill and the second windmill, wind energy can be reasonably utilized to achieve energy saving and environmental protection.

[0017] The speed, time and duration of the rotation of the first windmill driven by wind energy are uncontrollable. In order to improve the ability of the first stirring shaft to drive the first stirring blade to rotate normally when the conductive material and rainwater need to be stirred, a drive motor is provided at one end of the first stirring shaft away from the first windmill. The drive motor has a rotating shaft, which is connected to the first stirring shaft via a connector, and the drive motor can drive the first stirring shaft to rotate. The drive motor is electrically connected to a plurality of solar panels arranged outside the rainwater collection tank, and the drive motor is electrically connected to the control module. The solar panels can convert solar energy into electrical energy and store it through external batteries connected thereto. The DC power can be converted into AC power that can be used by the drive motor through an external power conversion device (such as an inverter). When the drive motor is not in operation, the rotating shaft of the drive motor can be driven to rotate by the first windmill.

[0018] Regarding the specific structure of the filter assembly, the filter assembly includes a flat filter and an arc-shaped filter located thereon. The flat filter is arranged at the upper port of the rainwater collection pool. The mesh of the arc-shaped filter is larger than the mesh of the flat filter. The arc-shaped filter can coarsely filter external impurities to prevent more impurities and garbage from falling into the rainwater collection pool and affecting the liquid output of the first automatic discharge valve. Moreover, its mesh is large and will not affect the rainwater falling into the rainwater collection pool.

[0019] A method for using a grounding resistance reduction device for an oil-immersed transformer comprises the following steps:

[0020] S1. Drill multiple holes around the grounding electrode, insert the liquid distribution pipes with soil monitoring units into the corresponding holes, and install the rainwater collection tank on the ground;

[0021] S2. The soil monitoring unit and the water level monitoring unit transmit the detected electrical signals to the control module respectively. The control module converts the electrical signal transmitted by the soil monitoring unit into a conductivity detection value and converts the electrical signal detected by the water level monitoring unit into a water level detection value. If the conductivity detection value is greater than or equal to the set conductivity threshold, the first automatic discharge valve and the second automatic discharge valve do not operate;

[0022] S3. If the conductivity detection value is less than the set conductivity threshold and the water level detection value is greater than the set water level threshold, the control module simultaneously sends a start signal to the second automatic discharge valve and the drive motor respectively. The second automatic discharge valve opens the discharge port according to the start signal. The opening time is 10-30 seconds. At the same time, the first stirring shaft drives the first stirring blade to rotate and stir the rainwater and the conductive material discharged from the conductive material chamber;

[0023] S4, after the stirring component stirs for the set time, the control module sends a start signal to the first automatic discharge valve, and the first automatic discharge valve opens the liquid outlet according to the start signal, and the opening time is 1-10 minutes;

[0024] S5. After the liquid outlet of the first automatic discharge valve is closed, the control module sends a closing signal to the drive motor, and the drive motor stops running according to the closing signal;

[0025] S6. The soil monitoring unit continuously monitors the conductivity of the soil and regularly sends an electrical signal to the control module. If the conductivity detection value is less than the set conductivity threshold, S3 is executed;

[0026] If the conductivity detection value is greater than or equal to the set conductivity threshold, S2 is executed.

[0027] The beneficial effects of the present invention are:

[0028] Rainwater is collected in a rainwater collection tank. When the soil near the grounding electrode becomes dry and its conductivity decreases, the rainwater in the rainwater collection tank is discharged through the first automatic discharge valve. The rainwater flows through multiple distribution pipes to the vicinity of the grounding electrode. The rainwater reacts with minerals and organic matter in the soil, further dissolving them and releasing more ions. These ions move freely in the soil solution, thereby increasing the soil's conductivity. In addition, rainwater can improve soil moisture and reduce soil resistivity, further improving soil conductivity.

[0029] To further improve soil conductivity, a conductive material chamber filled with conductive material is set up in the rainwater collection tank. The conductive material is discharged into the rainwater collection tank through the second automatic discharge valve. It is stirred by the stirring component. The first automatic discharge valve is opened and the stirred conductive solution is discharged into the soil through the liquid separation pipe. Compared with rainwater, it can significantly improve the conductivity of the soil.

[0030] The first automatic discharge valve and the second automatic discharge valve can be opened and closed independently by an external control module to realize the switching between rainwater and the solution with conductive material, thus avoiding excessive use of salty conductive solution and the phenomenon of soil salinization. That is, rainwater and the solution with conductive material can be alternately transported into the soil;

[0031] By utilizing wind energy to rotate the first windmill, rainwater and the conductive material can be stirred and mixed, achieving energy-saving and environmental protection effects; if it is necessary to stir the rainwater and the conductive material, and the first windmill cannot utilize wind energy to rotate, the control module can control the drive motor to drive the first stirring shaft and the first stirring blade thereon to rotate, and after stirring and mixing the rainwater and the conductive material for a certain period of time, the mixture is discharged into the soil, thereby achieving uniform distribution of the conductive solution;

[0032] By utilizing the wind energy to rotate the second windmill, the second stirring blade can be driven to rotate in the conductive material chamber, thereby breaking up the agglomerated conductive material and preventing the conductive material from agglomerating and being unable to be discharged smoothly into the rainwater collection pool. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In the attached figure:

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure;

[0035] Figure 2 for Figure 1 A in the middle is an enlarged structural diagram;

[0036] Figure 3 is the left view;

[0037] Figure 4 This is a schematic diagram of the position of the resistance reduction device on the soil;

[0038] Figure 5 It is a partial cross-sectional structural schematic diagram of the resistance reduction device;

[0039] The components represented by the reference numerals in the figure are:

[0040] 1. Oil-immersed transformer; 2. Grounding wire; 3. Grounding electrode; 4. Rainwater collection tank; 5. Conductive material chamber; 6. Liquid dispensing pipe; 61. Liquid outlet; 7. Pipeline; 8. First automatic discharge valve; 9. Second automatic discharge valve; 10. Leakage hole; 101. Center hole; 102. Through hole; 11. First stirring shaft; 12. First stirring blade; 13. First windmill; 14. Bearing; 15. Second stirring shaft; 16. Second stirring blade; 17. Second windmill; 18. Drive motor; 19. Solar panel; 20. Flat filter; 21. Curved filter; 22. Soil monitoring unit. DETAILED DESCRIPTION

[0041] See also Figure 1 、 Figure 3 、 Figure 4 and Figure 5The grounding resistance reduction device of an oil-immersed transformer shown in the figure is arranged on one side of the body of the oil-immersed transformer 1. A grounding wire 2 is provided on the oil-immersed transformer, and the grounding wire 2 is connected to a grounding electrode 3 inserted into the ground. A resistance reduction device is provided directly above the grounding electrode 3. The resistance reduction device includes a rainwater collection pool 4 located on the ground, a conductive material chamber 5 arranged therein, and a plurality of distribution pipes 6 connected to the rainwater collection pool 4. In this embodiment, four distribution pipes 6 arranged in a matrix are provided around the grounding electrode 3. The distribution pipes 6 are inserted into the ground. Several liquid outlet holes 61 facing the grounding electrode 3 are opened on the distribution pipes 6. A soil monitoring unit 22 is provided at the lower part of a single distribution pipe 6. The number and position of the soil monitoring units 22 are set according to actual conditions. The soil monitoring unit 22 can monitor parameters such as soil conductivity and humidity.

[0042] Among them, the lower part of the rainwater collection pool 4 is an arc-shaped bottom, and a first automatic discharge valve 8 is provided below the arc-shaped bottom. The first automatic discharge valve 8 can be opened or closed to discharge rainwater or conductive solution in the rainwater collection pool 4. A water level monitoring unit is provided in the rainwater collection pool 4. The water level monitoring unit is used to monitor the water level in the rainwater collection pool 4. The first automatic discharge valve 8 has a liquid outlet located at the lower part, and the upper parts of multiple liquid distribution pipes 6 are connected to the liquid outlet through pipes 7. There are multiple pipes 7, which are corresponding to the liquid distribution pipes 6. One end of the pipe 7 is sealed and connected to the liquid outlet, and the other end is connected to the upper part of the corresponding liquid distribution pipe 6.

[0043] See also Figure 2 As shown, the conductive material chamber 5 is located at the upper part of the inner side of the rainwater collection pool 4, and a second automatic discharge valve 9 is provided at the lower part of the conductive material chamber 5. The discharge of the conductive material in the conductive material chamber 5 is controlled by the second automatic discharge valve 9. A leakage hole 10 is provided on one side of the rainwater collection pool 4 and is located below the discharge port of the second automatic discharge valve 9. The leakage hole 10 includes a center hole 101 and a plurality of through holes 102 connected along its periphery. The first stirring shaft 11 is connected to the center hole 101 through a bearing 14 sleeved thereon. The bearing 14 is a waterproof bearing. The first stirring shaft 11 is fixedly connected to the inner ring of the bearing 14, and the outer ring of the bearing 14 is fixedly connected to the inner wall 101 of the center hole. The plurality of through holes 102 can discharge excess rainwater collected in the rainwater collection pool 4 to prevent rainwater from flooding the discharge port of the second automatic discharge valve 9 and reduce the phenomenon that rainwater enters the conductive material chamber 5 and causes the conductive material to become damp.

[0044] See also Figure 5As shown, a filter assembly is provided on the upper part of the rainwater collection pool 4, and a stirring assembly is provided inside. The stirring assembly includes a first stirring shaft 11 and a first stirring blade 12 arranged thereon. The first stirring shaft 11 passes through the leakage hole 10 in the horizontal direction and is rotatably connected to the rainwater collection pool 4. One end of the first stirring shaft 11 extends to the outside of the rainwater collection pool 4, and a first stirring shaft driving member is provided thereon. The first stirring shaft driving member can be a first windmill 13, which drives the first stirring shaft 11 and the first stirring blade 12 to rotate by external wind force, thereby stirring and mixing rainwater and conductive materials.

[0045] The speed, time, and duration of the rotation of the first windmill 13, which relies on wind energy, are uncontrollable. To ensure that the first stirring shaft 11 can normally drive the first stirring blade 12 to rotate when the conductive material and rainwater need to be stirred, a drive motor 18 is provided at the end of the first stirring shaft 11 away from the first windmill 13. The drive motor 18 has a rotating shaft, which is connected to the first stirring shaft 11 via a connector. The drive motor 18 can drive the first stirring shaft 11 to rotate. The drive motor 18 is electrically connected to a plurality of solar panels 19 disposed outside the rainwater collection tank 4, and the drive motor 18 is electrically connected to the control module. The solar panels 19 can convert solar energy into electrical energy and store it through an external battery connected thereto. The DC power can then be converted into AC power that can be used by the drive motor 18 through an external power conversion device (such as an inverter).

[0046] It should be noted that when the drive motor 18 is not in operation, the rotating shaft of the drive motor 18 can be driven to rotate by the first windmill 13. The first windmill 13 can use wind energy to rotate, so that the first windmill 13 can drive the first stirring blade 12 to rotate, and the rainwater collected in the rainwater collection pool 4 can be stirred at irregular intervals, so that the suspended matter or particles in the rainwater can be suspended in the rainwater, avoiding the particles from accumulating at the bottom of the rainwater collection pool 4 and affecting the liquid discharge of the first automatic discharge valve 8.

[0047] The soil monitoring unit 22 , the water level monitoring unit, the first automatic discharge valve 8 , the second automatic discharge valve 9 and the driving motor 18 are electrically connected to an external control module respectively.

[0048] The conductive material chamber 5 is filled with conductive material in the form of solid particles. If the material is placed in the conductive material chamber 5 for a long time, agglomeration may occur. In order to prevent the agglomerated conductive material from flowing out of the discharge port smoothly, a second stirring shaft 15 parallel to the first stirring shaft 11 is provided in the conductive material chamber 5. The second stirring shaft 15 is provided with a second stirring blade 16. The second stirring shaft 15 passes through the conductive material chamber 5 and the rainwater collection pool 4 and is connected to the second stirring shaft driving member outside the rainwater collection pool 4. The second stirring shaft driving member can be a second windmill 17, which can rotate under the drive of wind all day long, and then drive the second stirring blade 16 to rotate through the second stirring shaft 15, thereby breaking up the conductive material with solid particles.

[0049] In order to reduce the mutual interference between the first stirring shaft driving member and the second stirring shaft driving member during rotation, the first stirring shaft driving member and the second stirring shaft driving member are arranged in an upper and lower staggered manner. The first stirring shaft driving member includes a first windmill 13, and the second stirring shaft driving member includes a second windmill 17.

[0050] Because the force of stirring rainwater in rainwater collection tank 4 is greater than the force of stirring the conductive material in conductive material chamber 5, the blade length of first windmill 13 is set to be longer than the blade length of second windmill 17. The vertical spacing between first windmill 13 and second windmill 17 in the horizontal direction is greater than twice the blade length of first windmill 13. This can reduce interference between the rotation of first windmill 13 and second windmill 17. By using wind energy to drive the corresponding stirring shafts of first windmill 13 and second windmill 17, wind energy can be effectively utilized, achieving energy conservation and environmental protection.

[0051] Regarding the specific structure of the filter assembly, the filter assembly includes a flat filter screen 20 and an arc-shaped filter screen 21 located thereon. The flat filter screen 20 is arranged at the upper port of the rainwater collection pool 4. The mesh of the arc-shaped filter screen 21 is larger than the mesh of the flat filter screen 20. The arc-shaped filter screen 21 can coarsely filter external impurities to prevent more impurities and garbage from falling into the rainwater collection pool 4 and affecting the liquid output of the first automatic discharge valve 8. Moreover, its mesh size is large and will not affect the rainwater falling into the rainwater collection pool 4.

[0052] A method for using a grounding resistance reduction device for an oil-immersed transformer 1 comprises the following steps:

[0053] S1. Drill multiple holes around the ground electrode 3, insert the liquid distribution pipe 6 with the soil monitoring unit 22 into the corresponding holes, and install the rainwater collection tank 4 on the ground;

[0054] S2, the soil monitoring unit 22 and the water level monitoring unit respectively transmit the detected electrical signals to the control module, which converts the electrical signal transmitted by the soil monitoring unit 22 into a conductivity detection value and converts the electrical signal detected by the water level monitoring unit into a water level detection value. If the conductivity detection value is greater than or equal to the set conductivity threshold, the first automatic discharge valve 8 and the second automatic discharge valve 9 do not operate;

[0055] S3. If the conductivity detection value is less than the set conductivity threshold, and the water level detection value is greater than the set water level threshold, the control module simultaneously sends a start signal to the second automatic discharge valve 9 and the drive motor 18 respectively. The second automatic discharge valve 9 opens the discharge port according to the start signal. The opening time is 10-30s. The opening time can be set according to the discharge amount of the second automatic discharge valve 9. At the same time, the first stirring shaft 11 drives the first stirring blade 12 to rotate and stir the rainwater and the conductive material released from the conductive material chamber 5;

[0056] S4, after the stirring assembly stirs for the set time, the control module sends a start signal to the first automatic discharge valve 8, and the first automatic discharge valve 8 opens the liquid outlet according to the start signal. The opening time is 1-10 minutes, and the opening time can be set according to the liquid discharge volume of the first automatic discharge valve 8 per second;

[0057] S5. After the liquid outlet of the first automatic discharge valve 8 is closed, the control module sends a closing signal to the drive motor 18, and the drive motor 18 stops running according to the closing signal;

[0058] S6. The soil monitoring unit 22 continuously monitors the conductivity of the soil and regularly sends an electrical signal to the control module. If the conductivity detection value is less than the set conductivity threshold, S3 is executed;

[0059] If the conductivity detection value is greater than or equal to the set conductivity threshold, S2 is executed.

Claims

1. A grounding resistance reduction device for an oil-immersed transformer, arranged on one side of the body of the oil-immersed transformer (1), wherein the oil-immersed transformer is provided with a grounding wire (2), and the grounding wire (2) is connected to a grounding electrode (3) inserted into the ground, characterized in that: A resistance reduction device is provided directly above the ground electrode (3), the resistance reduction device comprising a rainwater collection pool (4) located on the ground, a conductive material chamber (5) disposed therein, and a plurality of liquid distribution pipes (6) connected to the rainwater collection pool (4). The plurality of liquid distribution pipes (6) are inserted underground and located around the ground electrode (3). The liquid distribution pipes (6) are provided with a plurality of liquid outlet holes (61) facing the ground electrode (3). A soil monitoring unit (22) is provided at the lower portion of the liquid distribution pipes (6); The lower part of the rainwater collection pool (4) is provided with a first automatic discharge valve (8), which is provided with a water level monitoring unit. The lower part of the first automatic discharge valve (8) has a liquid outlet, and the upper parts of the plurality of liquid distribution pipes (6) are all connected to the liquid outlet. The conductive material chamber (5) is located at the upper portion of the inner side of the rainwater collection pool (4); a second automatic discharge valve (9) is provided at the lower portion of the conductive material chamber (5); and a drainage hole (10) is provided on one side of the rainwater collection pool (4) and is located below the discharge port of the second automatic discharge valve (9); The rainwater collection pool (4) is provided with a filter assembly on its upper portion and a stirring assembly inside thereof, wherein the stirring assembly comprises a first stirring shaft (11) and a first stirring blade (12) arranged thereon, wherein the first stirring shaft (11) passes through the drain hole (10) in a horizontal direction and is rotatably connected to the rainwater collection pool (4), and one end of the first stirring shaft (11) extends to the outside of the rainwater collection pool (4) and is provided with a first stirring shaft driving member. The soil monitoring unit (22), the first automatic discharge valve (8), and the second automatic discharge valve (9) are electrically connected to an external control module respectively.

2. The grounding resistance reduction device for an oil-immersed transformer according to claim 1, characterized in that: A second stirring shaft (15) is rotatably provided in the conductive material chamber (5) and is parallel to the first stirring shaft (11). A second stirring blade (16) is provided on the second stirring shaft (15). The second stirring shaft (15) passes through the conductive material chamber (5) and the rainwater collection pool (4) and is connected to a second stirring shaft driving member outside the rainwater collection pool (4).

3. The grounding resistance reduction device for an oil-immersed transformer according to claim 1, characterized in that: The leakage hole (10) comprises a central hole (101) and a plurality of through holes (102) arranged along its periphery, and the first stirring shaft (11) is connected to the central hole (101) via a bearing (14) sleeved thereon.

4. The grounding resistance reduction device for an oil-immersed transformer according to claim 1, characterized in that: The first stirring shaft driving member and the second stirring shaft driving member are arranged alternately up and down.

5. The grounding resistance reduction device for an oil-immersed transformer according to claim 4, characterized in that: The first stirring shaft driving component includes a first windmill (13), and the second stirring shaft driving component includes a second windmill (17). The blade length of the first windmill (13) is greater than the blade length of the second windmill (17), and the vertical spacing between the first windmill (13) and the second windmill (17) in the horizontal direction is greater than twice the blade length of the first windmill (13).

6. The grounding resistance reduction device for an oil-immersed transformer according to claim 5, characterized in that: A drive motor (18) is provided at one end of the first stirring shaft (11) away from the first windmill (13); the drive motor (18) is electrically connected to a plurality of solar panels (19) arranged outside the rainwater collection tank (4); and the drive motor (18) is electrically connected to a control module.

7. The grounding resistance reduction device for an oil-immersed transformer according to claim 1, characterized in that: The filter assembly comprises a flat filter (20) and a curved filter (21) located thereon. The flat filter (20) is arranged at the upper port of the rainwater collection pool (4). The mesh of the curved filter (21) is larger than the mesh of the flat filter (20).

8. A method for using the grounding resistance reduction device for an oil-immersed transformer according to any one of claims 1 to 7, characterized in that: The steps include: S1. Drill multiple holes downward around the ground electrode (3), insert the liquid distribution pipe (6) with the soil monitoring unit (22) into the corresponding holes, and install the rainwater collection tank (4) on the ground; S2, the soil monitoring unit (22) and the water level monitoring unit respectively transmit the detected electrical signals to the control module, and the control module converts the electrical signal transmitted by the soil monitoring unit (22) into a conductivity detection value, and converts the electrical signal detected by the water level monitoring unit into a water level detection value. If the conductivity detection value is greater than or equal to a set conductivity threshold, the first automatic discharge valve (8) and the second automatic discharge valve (9) do not operate; S3. If the conductivity detection value is less than the set conductivity threshold value, and the water level detection value is greater than the set water level threshold value, the control module simultaneously sends a start signal to the second automatic discharge valve (9) and the drive motor (18), respectively. The second automatic discharge valve (9) opens the discharge port according to the start signal, and the opening time is 10-30 seconds. At the same time, the first stirring shaft (11) drives the first stirring blade (12) to rotate and stir the rainwater and the conductive material discharged from the conductive material chamber (5); S4, after the stirring component stirs for a set time, the control module sends a start signal to the first automatic discharge valve (8), and the first automatic discharge valve (8) opens the liquid outlet according to the start signal, and the opening time is 1-10 minutes; S5. After the liquid outlet of the first automatic discharge valve (8) is closed, the control module sends a closing signal to the drive motor (18), and the drive motor (18) stops running according to the closing signal; S6, the soil monitoring unit (22) continuously monitors the conductivity of the soil and regularly sends an electrical signal to the control module. If the conductivity detection value is less than the set conductivity threshold, S3 is executed; If the conductivity detection value is greater than or equal to the set conductivity threshold, S2 is executed.

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