High-voltage capacitor electricity taking device

Abstract

The invention discloses a high-voltage capacitance electricity taking device, and relates to the field of electric energy storage, the high-voltage capacitance electricity taking device comprises an electricity taking device shell, an electromagnetic unit and a flowing part, an insulating sleeve is arranged on the electricity taking device shell, a capacitance voltage divider is arranged in the insulating sleeve, a spiral cavity is formed in the electricity taking device shell, and a power source is arranged in the spiral cavity. A first flowing opening and a second flowing opening are formed in the inner side wall of the electricity taking device shell, and the spiral cavity communicates with the electricity taking device shell through the first flowing opening and the second flowing opening. When a high-voltage power transmission circuit is switched on and the environment temperature and humidity are relatively high, the flowing part works to enable the locally overheated insulating oil of the electromagnetic unit to circularly flow, and the wind wheel on the connecting shaft rotates to form airflow to perform air-cooling heat dissipation on the expanded heat dissipation fins, so that the insulating oil entering the heat dissipation fins is cooled, and the heat dissipation efficiency is improved. The temperature of the insulating oil is further reduced, and the situation that the insulating oil is decomposed to generate a large amount of gas to damage the shell of the power taking device under the action of long-time high temperature and high electric field intensity is avoided.

Description

Technical Field

[0001] The present invention relates to the field of electric energy storage, and more specifically, to a high-voltage capacitive power-taking device. Background Art

[0002] A high-voltage capacitive power-taking device is a device that can obtain energy from a high-voltage power line. It converts high-voltage electricity into low-voltage electricity through components such as capacitors and voltage transformers, and then supplies it to electrical appliances for use. This device has a wide range of applications in the power system, such as providing power for power metering equipment, monitoring equipment, etc.;

[0003] However, in the prior art, due to the high grid voltage, high environmental humidity, and difficult heat dissipation, when the capacitive power-taking device is under the action of high temperature and high electric field intensity for a long time, a large amount of gas is generated by the decomposition of insulating oil, resulting in the explosion of the box shell and insulating sleeve; and the power supply capacity of the storage battery often decreases rapidly during long-term use, unable to provide sufficient power for the FTU, and even unable to perform the operation of opening and closing the switch; affecting the monitoring of the power grid; For this reason, we have designed a high-voltage capacitive power-taking device. Summary of the Invention

[0004] Aiming at the problems in the prior art that the capacitive power-taking device has difficulty in heat dissipation in high-temperature and high-humidity environments and the power supply capacity of the storage battery often decreases rapidly during long-term use, affecting the normal monitoring of the power grid, the purpose of the present invention is to provide a high-voltage capacitive power-taking device.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A high-voltage capacitive power-taking device includes a power-taking device housing, an electromagnetic unit, and a flow part. An insulating sleeve is provided on the power-taking device housing, and a capacitive voltage divider is provided inside the insulating sleeve. A spiral cavity is provided inside the power-taking device housing, and a flow port one and a flow port two are provided on the inner side wall of the power-taking device housing. The spiral cavity is connected to the power-taking device housing through the flow port one and the flow port two. An installation frame is provided below the power-taking device housing;

[0007] The electromagnetic unit is arranged inside the power-taking device housing. The electromagnetic unit is electrically connected to the capacitive voltage divider, and a first power supply and a second power supply are connected to the output end of the electromagnetic unit;

[0008] The flow part is arranged on the power-taking device housing. The power-taking device housing is filled with insulating oil. The flow part includes a plurality of stirring wheels for circulating the insulating oil in the spiral cavity.

[0009] Further, power supply boxes are provided on both sides of the housing of the power taking device. The first power supply and the second power supply are respectively arranged in a pair of power supply boxes. A plurality of heat dissipation fins are provided on the power supply boxes. A communication cavity is provided in the side wall of the power supply box below the heat dissipation fins, and a plurality of the heat dissipation fins are all communicated with the communication cavity.

[0010] Further, the electromagnetic unit includes:

[0011] A medium-voltage transformer fixedly installed in the housing of the power taking device. A compensation reactor is connected in series in the circuit of the medium-voltage transformer. A damping element is connected to the output end circuit of the medium-voltage transformer. The first power supply and the second power supply are connected to the output end circuit of the medium-voltage transformer, and the first power supply and the second power supply are arranged in parallel in the circuit;

[0012] The capacitor voltage divider is divided into a high-voltage capacitor area and a medium-voltage capacitor area. A medium-voltage tap is provided at the medium-voltage capacitor area, and the medium-voltage transformer is connected to the medium-voltage tap in the circuit.

[0013] Further, an installation disc is provided on the insulating sleeve. A high-voltage wiring terminal board is provided on the installation disc. One end of the high-voltage wiring terminal board is connected to the capacitor voltage divider in the circuit, and the other end is connected to the high-voltage transmission line.

[0014] Further, the flow part further includes:

[0015] An installation box provided on the side wall of the housing of the power taking device. A driving motor is fixedly installed in the installation box. A connecting shaft is coaxially and fixedly connected to the stirring wheel. The connecting shaft is rotatably connected to the side wall of the housing of the power taking device. A wind wheel is coaxially and fixedly connected to the end of the connecting shaft away from the stirring wheel;

[0016] A same belt one is wound between the output end of the driving motor and one of the connecting shafts, and a belt two is wound between a plurality of the connecting shafts.

[0017] Further, the spiral cavity is communicated with the communication cavity, and a plurality of the wind wheels are arranged opposite to the heat dissipation fins.

[0018] Further, a heat dissipation fan is installed on the side wall of the power supply box, and a dust-proof heat dissipation net is provided on the side wall of the power supply box opposite to the heat dissipation fan.

[0019] Further, an installation plate is provided on the power supply box. A plurality of bolt installation holes are provided on the power supply box. A plurality of installation bolts are provided on the installation plate. The installation plate and the power supply box are assembled and installed through the installation bolts and the bolt installation holes. A plug-in interface is provided on the power supply box. The first power supply and the second power supply are respectively connected to a group of plug-in interfaces in the circuit.

[0020] Compared with the prior art, the beneficial effects of the present invention:

[0021] (1) When this application is connected to a high-voltage transmission line and the ambient temperature and humidity are relatively high, the flowing part works to circulate the insulating oil with local overheating of the electromagnetic unit, and the wind wheel on the connecting shaft rotates to form an air flow to cool the expanded heat dissipation fins by air cooling, dissipating the heat of the insulating oil entering the heat dissipation fins, further reducing the temperature of the insulating oil, and avoiding damage to the power-taking device housing caused by the decomposition of a large amount of gas generated by the insulating oil under the action of high temperature and high electric field intensity for a long time.

[0022] (2) When the temperature inside the power-taking device housing is normal, due to the air flow at high altitude, the wind wheel rotates. By installing a generator in the power supply box and driving one of the connecting shafts with the output end of the generator, it is convenient for the generator to generate electricity, making full use of wind energy to convert it into electrical energy of the power supply, facilitating the supply of electrical energy for the flowing part and the cooling fan to work, and ensuring the normal working environment of the electromagnetic unit and the power supply.

[0023] (3) This application sets the cooling fan on one side of the power supply box, and a dust-proof and heat-dissipating net is set on the side opposite to the cooling fan, facilitating the circulating flow of air inside the power supply box to cool the power supply. And by connecting the first power supply and the second power supply in parallel, it is ensured that when one power supply fails, the other power supply can immediately take over the power supply, ensuring the reliable electrical energy supply for the normal monitoring of the power grid. Description of the Drawings

[0024] Figure 1 is the overall structure schematic diagram of a high-voltage capacitor power-taking device provided by an embodiment of this application;

[0025] Figure 2 is the schematic diagram of another perspective of the overall structure of a high-voltage capacitor power-taking device provided by an embodiment of this application;

[0026] Figure 3 is the internal structure schematic diagram of a high-voltage capacitor power-taking device provided by an embodiment of this application;

[0027] Figure 4 is Figure 1 the enlarged schematic diagram of part A in

[0028] Figure 5 is the installation structure schematic diagram of the flowing part and the spiral cavity of a high-voltage capacitor power-taking device provided by an embodiment of this application;

[0029] Figure 6 is the structural schematic diagram of the stirring assembly of a high-voltage capacitor power-taking device provided by an embodiment of this application;

[0030] Figure 7 is the working circuit diagram of a high-voltage capacitor power-taking device provided by an embodiment of this application.

[0031] Description of reference numerals in the figure:

[0032] 1. Power-taking device housing; 11. First flow port; 12. Second flow port; 13. Spiral cavity; 14. Insulating sleeve; 15. High-voltage terminal board; 16. Power supply box; 161. Cooling fan; 162. Dust-proof and heat-dissipating net; 163. Heat-dissipating fins; 164. Mounting plate; 17. Mounting bracket; 2. Electromagnetic unit; 21. Medium-voltage transformer; 22. Compensation reactor; 23. Damping element; 24. Capacitor voltage divider; 241. High-voltage capacitor area; 242. Medium-voltage capacitor area; 25. Mounting disc; 26. First power supply; 27. Second power supply; 28. Plug-in interface; 3. Flow part; 31. Installation box; 32. First belt; 33. Wind wheel; 331. Connecting shaft; 34. Stirring wheel; 35. Second belt. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Embodiment 1, please refer to Figures 1 to 7 , which is the first embodiment of the present invention. This embodiment provides a high-voltage capacitor power-taking device, which includes a power-taking device housing 1, an electromagnetic unit 2, and a flow part 3. An insulating sleeve 14 is provided on the power-taking device housing 1, and a capacitor voltage divider 24 is provided inside the insulating sleeve 14. A spiral cavity 13 is provided inside the power-taking device housing 1, and a first flow port 11 and a second flow port 12 are provided on the inner side wall of the power-taking device housing 1. The spiral cavity 13 is connected to the power-taking device housing 1 through the first flow port 11 and the second flow port 12, and a mounting bracket 17 is provided below the power-taking device housing 1;

[0035] And a mounting disc 25 is provided on the insulating sleeve 14, and a high-voltage terminal board 15 is provided on the mounting disc 25. One end of the high-voltage terminal board 15 is circuit-connected to the capacitor voltage divider 24, and the other end is connected to a high-voltage transmission line;

[0036] Its usage process: The high-voltage electricity of the high-voltage transmission line connected to the high-voltage terminal board 15 is converted into low-voltage electricity through the capacitor voltage divider 24 and the electromagnetic unit 2, and the converted low-voltage electricity is transmitted to the power supply and supplied to the electrical appliance for use;

[0037] By arranging a spiral cavity 13 inside the side wall of the power-taking device housing 1, a first flow port 11 and a second flow port 12 are formed on the inner wall of the power-taking device housing 1. The two ends of the spiral cavity 13 are respectively communicated with the inner wall of the power-taking device housing 1 through the first flow port 11 and the second flow port 12, and then the temperature inside the power-taking device housing 1 is monitored by a temperature and humidity monitor.

[0038] Embodiment 2, as Figures 3 to 6 shown, is the second embodiment of the present invention. Different from the previous embodiment, this embodiment provides a flow part 3 of a high-voltage capacitor power-taking device. The flow part 3 is arranged on the power-taking device housing 1. The power-taking device housing 1 is filled with insulating oil. The flow part 3 includes a plurality of stirring wheels 34 for circulating the insulating oil in the spiral cavity 13; the flow part 3 further includes:

[0039] An installation box 31 arranged on the side wall of the power-taking device housing 1. A driving motor is fixedly installed inside the installation box 31. A connecting shaft 331 is coaxially and fixedly connected to the stirring wheel 34. The connecting shaft 331 is rotationally connected to the side wall of the power-taking device housing 1. One end of the connecting shaft 331 away from the stirring wheel 34 is coaxially and fixedly connected to a wind wheel 33;

[0040] A same first belt 32 is wound between the output end of the driving motor and one of the connecting shafts 331, and a second belt 35 is wound between the plurality of connecting shafts 331;

[0041] During the use process: when it is monitored that the power-taking device housing 1 continuously generates relatively high heat due to the long-term operation of the electromagnetic unit 2, since one of the connecting shafts 331 is connected to the output end of the driving motor through the first belt 32, and the plurality of connecting shafts 331 are driven by a plurality of second belts 35, when the output end of the driving motor works, the plurality of connecting shafts 331 respectively drive the plurality of stirring wheels 34 to rotate, and convey the insulating oil in the spiral cavity 13;

[0042] The insulating oil inside the power-taking device housing 1 flows through the spiral cavity 13, circulates the insulating oil with local overheating of the electromagnetic unit 2, prevents local overheating of the electromagnetic unit 2, and ensures the normal operation of the electromagnetic unit 2;

[0043] Please refer to Figure 3 , power supply boxes 16 are arranged on both sides of the power-taking device housing 1. A first power supply 26 and a second power supply 27 are respectively arranged in a pair of power supply boxes 16. A plurality of heat dissipation fins 163 are arranged on the power supply boxes 16. A communication cavity is arranged inside the side wall of the power supply box 16 below the heat dissipation fins 163. The plurality of heat dissipation fins 163 are all communicated with the communication cavity; the spiral cavity 13 is communicated with the communication cavity, and a plurality of wind wheels 33 are arranged opposite to the heat dissipation fins 163;

[0044] Meanwhile, a plurality of heat dissipation fins 163 and communication cavities are provided on both the upper and lower side walls of the power supply box 16. The communication cavities are connected to the spiral cavity 13, and a plurality of heat dissipation fins 163 are all connected to the communication cavities. When the temperature inside the power taking device housing 1 rises, the heat dissipation fins 163 expand;

[0045] And the wind wheel 33 on the connecting shaft 331 rotates to form an air flow to perform air cooling on the expanded heat dissipation fins 163, dissipate the insulating oil entering the heat dissipation fins 163, further reduce the temperature of the insulating oil, ensure the normal working environment of the electromagnetic unit 2 inside the power taking device housing 1, and avoid damage to the power taking device housing 1 caused by a large amount of gas generated by the decomposition of the insulating oil under the action of high temperature and high electric field intensity for a long time.

[0046] Embodiment 3, as Figure 3 and Figure 7 shown, is the third embodiment of the present invention. Different from the previous embodiment, this embodiment provides an electromagnetic unit 2 of a high-voltage capacitor power taking device. The electromagnetic unit 2 is arranged inside the power taking device housing 1. The electromagnetic unit 2 is circuit-connected to the capacitor voltage divider 24, and the output end of the electromagnetic unit 2 is connected with a first power supply 26 and a second power supply 27; The electromagnetic unit 2 includes:

[0047] A medium-voltage transformer 21 fixedly installed inside the power taking device housing 1, a compensation reactor 22 is connected in series with the medium-voltage transformer 21 in the circuit, a damping element 23 is connected to the output end of the medium-voltage transformer 21 in the circuit, the first power supply 26 and the second power supply 27 are connected to the output end of the medium-voltage transformer 21 in the circuit, and the first power supply 26 and the second power supply 27 are arranged in parallel in the circuit;

[0048] Among them, the capacitor voltage divider 24 is divided into a high-voltage capacitor area 241 and a medium-voltage capacitor area 242. A medium-voltage tap is provided at the medium-voltage capacitor area 242, and the medium-voltage transformer 21 is circuit-connected to the medium-voltage tap;

[0049] Here, as Figure 7 shown, U 1 is the voltage received by the high-voltage transmission line of the power grid; D 1 is the high-voltage terminal board 15; C 1 is the high-voltage capacitor area 241; C 2 is the medium-voltage capacitor area 242; D 2 is the medium-voltage tap; N 1 is the low-voltage terminal; N 2 is the grounding terminal; X is the compensation reactor 22; Rd is the damping element 23; U 2 is the voltage after the medium-voltage transformer 21 steps down the voltage; p 1 is the first power supply 26; p 2 is the second power supply 27;

[0050] The high voltage of the high voltage transmission line connected to the high voltage terminal board 15 is converted into low voltage electricity through the capacitive voltage divider 24 and the electromagnetic unit 2, and the converted low voltage electricity is stored in the first power supply 26 and the second power supply 27, and is supplied to the electrical appliances by the first power supply 26 and the second power supply 27.

[0051] Please refer to Figure 3 , a heat dissipation fan 161 is installed on the side wall of the power supply box 16, and a dust-proof heat dissipation net 162 is provided on the side wall of the power supply box 16 opposite to the heat dissipation fan 161; an installation plate 164 is provided on the power supply box 16, a plurality of bolt installation holes are opened on the power supply box 16, a plurality of installation bolts are provided on the installation plate 164, the installation plate 164 and the power supply box 16 are assembled and installed through the installation bolts and the bolt installation holes, a plug-in interface 28 is provided on the power supply box 16, and the first power supply 26 and the second power supply 27 are respectively circuit-connected to a group of plug-in interfaces 28;

[0052] During use: by arranging the heat dissipation fan 161 on one side of the power supply box 16 and arranging the dust-proof heat dissipation net 162 on the side opposite to the heat dissipation fan 161, it is convenient for the air in the power supply box 16 to circulate and flow, so as to cool the power supply. And by connecting the first power supply 26 and the second power supply 27 in parallel, it is ensured that when one power supply fails, the other power supply can immediately take over the power supply to ensure reliable electric energy for the normal monitoring of the power grid; the modular design makes the maintenance and replacement of the power supply convenient, and the use of dual power supplies reduces the maintenance cost;

[0053] By real-time monitoring the state of the battery, calculating the remaining power, recording the historical charge and discharge data of the battery, predicting the remaining life and usage status of the battery through data analysis algorithms, in the case of good battery state and suitable temperature, a fast charging mode is adopted to quickly restore the battery energy. After the battery is fully charged, it is switched to trickle charging to maintain the charging state of the battery and prevent overcharging.

[0054] It can be seen from the above that the working principle of this application is as follows:

[0055] First, a spiral cavity 13 is arranged inside the side wall of the power taking device housing 1. Flow ports one 11 and flow ports two 12 are opened on the inner wall of the power taking device housing 1. Both ends of the spiral cavity 13 are communicated with the inner wall of the power taking device housing 1 through the flow ports one 11 and the flow ports two 12 respectively, and the temperature inside the power taking device housing 1 is monitored through the temperature and humidity monitor;

[0056] When it is detected that the housing 1 of the power-taking device continuously generates a relatively high heat due to the long-term operation of the electromagnetic unit 2, since one of the connecting shafts 331 is connected to the output end of the driving motor through the first belt 32, and the multiple connecting shafts 331 are driven by multiple second belts 35, when the output end of the driving motor works, the multiple connecting shafts 331 drive the multiple stirring wheels 34 to rotate respectively, conveying the insulating oil in the spiral cavity 13, circulating the insulating oil in the housing 1 of the power-taking device through flowing in the spiral cavity 13, circulating the insulating oil with local overheating of the electromagnetic unit 2, preventing local overheating of the electromagnetic unit 2, and ensuring the normal operation of the electromagnetic unit 2;

[0057] Meanwhile, a plurality of heat dissipation fins 163 and communication cavities are provided on both the upper and lower side walls of the power supply box 16. The communication cavity is connected to the spiral cavity 13, and the plurality of heat dissipation fins 163 are all connected to the communication cavity. When the temperature in the housing 1 of the power-taking device rises, the heat dissipation fins 163 expand, and the air wheel 33 on the connecting shaft 33 rotates to form an air flow to perform air cooling on the expanded heat dissipation fins 163, dissipating the heat of the insulating oil entering the heat dissipation fins 163, further reducing the temperature of the insulating oil, ensuring the normal working environment of the electromagnetic unit 2 in the housing 1 of the power-taking device, and avoiding damage to the housing 1 of the power-taking device caused by a large amount of gas generated by the decomposition of the insulating oil under the action of high temperature and high electric field intensity for a long time;

[0058] In addition, when the temperature in the housing 1 of the power-taking device is normal, due to the air flow at high altitude, the air wheel 33 rotates. By installing a generator in the power supply box 16 and driving one of the connecting shafts 331 to the output end of the generator, it is convenient for the generator to generate electricity, making full use of wind energy to convert it into electrical energy of the power supply, and facilitating the supply of electrical energy for the operation of the mobile part 3 and the heat dissipation fan 161, ensuring the normal working environment of the electromagnetic unit 2 and the power supply;

[0059] By arranging the heat dissipation fan 161 on one side of the power supply box 16 and arranging a dust-proof and heat-dissipating net 162 on the side opposite to the heat dissipation fan 161, it is convenient for the air in the power supply box 16 to circulate and cool the power supply. And by connecting the first power supply 26 and the second power supply 27 in parallel, it is ensured that when one power supply fails, the other power supply can immediately take over the power supply, ensuring the reliable electrical energy supply for the normal monitoring of the power grid.

[0060] The above is only the preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. A high voltage capacitor power supply device, characterized in that: include: A power extraction device shell (1), an electromagnetic unit (2) and a flow portion (3), wherein the power extraction device shell (1) is provided with an insulating sleeve (14), a capacitive voltage divider (24) is provided in the insulating sleeve (14), a spiral cavity (13) is provided in the power extraction device shell (1), a flow port 1 (11) and a flow port 2 (12) are provided on the inner side wall of the power extraction device shell (1), the spiral cavity (13) is connected to the power extraction device shell (1) through the flow port 1 (11) and the flow port 2 (12), and a mounting frame (17) is provided below the power extraction device shell (1); The electromagnetic unit (2) is arranged in a power extraction device housing (1), the electromagnetic unit (2) is connected to a capacitive voltage divider (24) circuit, and the output end of the electromagnetic unit (2) is connected to a first power source (26) and a second power source (27); The flow portion (3) is arranged on the power extraction device housing (1), the power extraction device housing (1) is filled with insulating oil, and the flow portion (3) comprises a plurality of stirring wheels (34) for circulating the insulating oil in the spiral cavity (13).

2. A high voltage capacitor power extraction device according to claim 1, characterized in that: Power boxes (16) are provided on both sides of the power supply device housing (1); the first power supply (26) and the second power supply (27) are respectively arranged in a pair of power boxes (16); a plurality of heat dissipation fins (163) are provided on the power box (16); a connecting cavity is provided in the side wall of the power box (16) below the heat dissipation fins (163); and the plurality of heat dissipation fins (163) are all connected to the connecting cavity.

3. A high-voltage capacitor power extraction device according to claim 1, characterized in that: The electromagnetic unit (2) comprises: A medium-voltage transformer (21) is fixedly mounted in the housing (1) of the power taking device, the circuit of the medium-voltage transformer (21) is connected in series with a compensating reactor (22), the output circuit of the medium-voltage transformer (21) is connected with a damping element (23), the first power source (26) and the second power source (27) are connected to the output circuit of the medium-voltage transformer (21), and the first power source (26) and the second power source (27) are arranged in parallel; The capacitive voltage divider (24) is divided into a high-voltage capacitor area (241) and a medium-voltage capacitor area (242); a medium-voltage tap is provided at the medium-voltage capacitor area (242); and the medium-voltage transformer (21) is connected to the medium-voltage tap circuit.

4. A high-voltage capacitor power extraction device according to any one of claims 1 to 3, characterized in that: The insulating sleeve (14) is provided with a mounting plate (25), and the mounting plate (25) is provided with a high-voltage terminal board (15). One end of the high-voltage terminal board (15) is connected to the capacitive voltage divider (24) circuit, and the other end is connected to the high-voltage transmission line.

5. A high-voltage capacitor power extraction device according to claim 2, characterized in that: The flow part (3) further comprises: An installation box (31) is arranged on the side wall of the power extraction device housing (1), a driving motor is fixedly installed in the installation box (31), a connecting shaft (331) is coaxially fixedly connected to the stirring wheel (34), the connecting shaft (331) is rotatably connected to the side wall of the power extraction device housing (1), and a wind wheel (33) is coaxially fixedly connected to one end of the connecting shaft (331) away from the stirring wheel (34); A same belt one (32) is wound between the output end of the driving motor and one of the connecting shafts (331), and a belt two (35) is wound between a plurality of the connecting shafts (331).

6. A high-voltage capacitor power extraction device according to claim 5, characterized in that: The spiral cavity (13) is in communication with the connecting cavity, wherein a plurality of wind wheels (33) are arranged facing the heat dissipation fins (163).

7. A high-voltage capacitor power extraction device according to claim 2, characterized in that: A cooling fan (161) is installed on the side wall of the power box (16), and a dustproof cooling net (162) is provided on the side wall of the power box (16) opposite to the cooling fan (161).

8. A high-voltage capacitor power extraction device according to claim 7, characterized in that: The power box (16) is provided with a mounting plate (164), the power box (16) is provided with a plurality of bolt mounting holes, the mounting plate (164) is provided with a plurality of mounting bolts, the mounting plate (164) and the power box (16) are assembled and installed via the mounting bolts and the bolt mounting holes, the power box (16) is provided with a plug-in interface (28), and the first power supply (26) and the second power supply (27) are respectively connected to a group of plug-in interfaces (28) circuits.

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