Wind turbine, storage medium, carbon brush wear monitoring device and monitoring method

Abstract

The present invention relates to the technical field of wind power generation equipment, and in particular to a wind turbine, a storage medium, a carbon brush wear monitoring device and a monitoring method. The carbon brush wear monitoring device includes: a first carbon powder concentration detection component, which is used to detect the concentration of carbon powder formed after the carbon brush of the wind turbine is worn; a prompting unit, which is used to issue a prompt; a controller, which is electrically connected to the first carbon powder concentration detection component and the prompting unit, and the controller controls the prompting unit to operate according to the concentration of carbon powder detected by the first carbon powder concentration detection component. The present invention can detect the concentration of carbon powder formed after the carbon brush of the wind turbine is worn in real time, and then monitor the wear amount of the carbon brush in real time, and then control the prompting unit to perform corresponding actions according to the first carbon powder concentration, so as to facilitate the timely replacement of the carbon brush.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation equipment, and particularly relates to a wind turbine generator, a storage medium, a carbon brush wear monitoring device and a monitoring method. Background Art

[0002] Currently, a wind turbine generator includes a generator and a slip ring chamber. A slip ring and carbon brushes are provided in the slip ring chamber. The slip ring is a key structure for the output of the rotor current of the generator. The carbon brushes are in high-speed contact with the slip ring to generate high temperature, causing the carbon powder to quickly fall off, which is likely to pollute the generator and the surrounding environment, and even cause serious faults such as short circuits. However, during the operation of the generator, the wear amount of the carbon brushes cannot be monitored in real time. Therefore, it is necessary to monitor the wear amount of the carbon brushes for timely replacement. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the wear amount of the carbon brushes in the prior art cannot be monitored in real time, so as to provide a wind turbine generator, a storage medium, a carbon brush wear monitoring device and a monitoring method.

[0004] To solve the above problems, the present invention provides a carbon brush wear monitoring device, including: a first carbon powder concentration detection component for detecting the concentration of carbon powder formed after the wear of the carbon brushes of the wind turbine generator; a prompting part for giving a prompt; a controller electrically connected to the first carbon powder concentration detection component and the prompting part, and the controller controls the action of the prompting part according to the concentration of carbon powder detected by the first carbon powder concentration detection component.

[0005] Optionally, it further includes: a second carbon powder concentration detection component for detecting the concentration of carbon powder in the nacelle of the wind turbine generator; a rotational speed detection component for detecting the rotational speed of the cooling fan of the wind turbine generator; wherein, the concentration of carbon powder detected by the first carbon powder concentration detection component is the first carbon powder concentration, the concentration of carbon powder detected by the second carbon powder concentration detection component is the second carbon powder concentration, the controller is electrically connected to the second carbon powder concentration detection component and the rotational speed detection component, the controller controls the action of the prompting part according to the first carbon powder concentration and the wear amount of the carbon brushes, the air volume of the cooling fan is proportional to the rotational speed of the cooling fan, and the wear amount of the carbon brushes is the product of the difference between the first carbon powder concentration and the second carbon powder concentration and the air volume of the cooling fan.

[0006] Optionally, the first carbon powder concentration detection component is arranged in the slip ring chamber of the wind turbine generator, or the first carbon powder concentration detection component is arranged in the carbon discharge pipe of the wind turbine generator. A carbon discharge port is opened on the slip ring chamber, and the carbon discharge port is connected to the carbon discharge pipe.

[0007] The present invention also provides a wind turbine generator, including: the above-mentioned carbon brush wear monitoring device.

[0008] The present invention also provides a method for monitoring carbon brush wear, comprising the following steps: obtaining a first carbon powder concentration detected by a first carbon powder concentration detection component for carbon powder formed after wear of a carbon brush of a wind turbine; and controlling a prompting action based on the first carbon powder concentration.

[0009] Optionally, the step of controlling a prompting action based on the first carbon powder concentration includes: determining whether the first carbon powder concentration is greater than or equal to a first threshold; when the first carbon powder concentration is greater than or equal to the first threshold, adjusting the rotation speed of a cooling fan of the wind turbine or the power of the wind turbine; after adjusting the rotation speed of the cooling fan or the power of the wind turbine for a preset time, determining whether the first carbon powder concentration is greater than or equal to the first threshold, and when the first carbon powder concentration is greater than or equal to the first threshold, controlling a prompting action to be issued.

[0010] Optionally, when the first carbon powder concentration is less than the first threshold, obtaining a second carbon powder concentration detected by a second carbon powder concentration detection component and the rotation speed of the cooling fan; determining the wear amount of the carbon brush based on the first carbon powder concentration, the second carbon powder concentration and the rotation speed of the cooling fan; and controlling a prompting action to be issued based on the wear amount of the carbon brush; wherein, the air volume of the cooling fan is proportional to the rotation speed of the cooling fan, and the wear amount of the carbon brush is the product of the difference between the first carbon powder concentration and the carbon powder concentration and the air volume of the cooling fan.

[0011] Optionally, the step of controlling a prompting action based on the wear amount of the carbon brush includes: determining whether the wear amount of the carbon brush is greater than or equal to a preset wear amount; when the wear amount of the carbon brush is greater than or equal to the preset wear amount, controlling a prompting action to be issued.

[0012] Optionally, when the wear amount of the carbon brush is less than the preset wear amount, determining whether the second carbon powder concentration is greater than or equal to a second threshold; when the second carbon powder concentration is greater than or equal to the second threshold, determining that the carbon discharge pipe leaks and controlling a prompting action to be issued.

[0013] The present invention also provides a storage medium, on which computer instructions are stored, and when the instructions are executed by a processor, the above-mentioned method for monitoring carbon brush wear is implemented.

[0014] The present invention has the following advantages:

[0015] 1. The first carbon powder concentration detection component sends the detected first carbon powder concentration to the controller, and the controller can detect in real time the concentration of carbon powder formed after wear of the carbon brush of the wind turbine, and then monitor in real time the wear amount of the carbon brush, and then control the prompting part to perform corresponding actions based on the first carbon powder concentration, so as to facilitate timely replacement of the carbon brush.

[0016] 2. The difference between the first toner concentration and the second toner concentration is the actual concentration of the toner formed after the carbon brush wears. Combining with the air volume of the air, the discharge amount of the toner per unit time can be calculated, which is also the wear amount of the carbon brush. According to the wear amount of the carbon brush, the wear condition of the carbon brush can be accurately reflected, which is convenient for replacing the carbon brush in time and can also extend the service life of the carbon brush.

[0017] 3. When the carbon brush wears too fast, it is necessary to take measures to reduce the wear speed of the carbon brush, which can protect the carbon brush and extend its service life. Adjusting the rotation speed of the cooling fan of the wind turbine or the power of the wind turbine specifically means increasing the rotation speed of the cooling fan or reducing the power of the generator. The higher the rotation speed of the cooling fan is increased, the faster the air flow can be accelerated, and then the carbon brush can be quickly cooled down to reduce the wear speed of the carbon brush; reducing the power of the generator can reduce the rotation speed of the rotor of the generator, and then reduce the wear speed of the carbon brush. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 Fig. shows a simplified schematic diagram of a wind turbine according to an embodiment of the present invention;

[0020] Figure 2 Fig. shows a flowchart of a carbon brush wear monitoring method according to an embodiment of the present invention.

[0021] DESCRIPTION OF THE REFERENCE NUMERALS:

[0022] 10. First toner concentration detection component; 20. Second toner concentration detection component; 41. Generator; 42. Machine nacelle; 43. Slip ring chamber; 44. Carbon discharge pipe; 45. Cooling fan. SPECIFIC EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. 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.

[0024] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] As Figure 1 shown, the carbon brush wear monitoring device of this embodiment includes: a first carbon powder concentration detector 10, a prompting part, and a controller. The first carbon powder concentration detector 10 is used to detect the concentration of the carbon powder formed after the carbon brush of the wind turbine is worn; the prompting part is used to issue a prompt; the controller is electrically connected to the first carbon powder concentration detector 10 and the prompting part, and the controller controls the prompting part to act according to the concentration of the carbon powder detected by the first carbon powder concentration detector 10. Among them, the concentration of the carbon powder detected by the first carbon powder concentration detector 10 is the first carbon powder concentration.

[0028] Applying the carbon brush wear monitoring device of this embodiment, the first carbon powder concentration detector 10 sends the detected first carbon powder concentration to the controller. The controller can detect the concentration of the carbon powder formed after the carbon brush of the wind turbine is worn in real time, and then monitor the wear amount of the carbon brush in real time. Then, it controls the prompting part to perform corresponding actions according to the first carbon powder concentration, so as to facilitate the timely replacement of the carbon brush.

[0029] In this embodiment, the carbon brush wear monitoring device further includes: a second carbon powder concentration detector 20 and a rotation speed detector. The second carbon powder concentration detector 20 is used to detect the concentration of carbon powder in the nacelle 42; the rotation speed detector is used to detect the rotation speed of the cooling fan 45 of the wind turbine. Among them, the concentration of carbon powder detected by the first carbon powder concentration detector 10 is the first carbon powder concentration ρ1, and the concentration of carbon powder detected by the second carbon powder concentration detector 20 is the second carbon powder concentration ρ2. The controller is electrically connected to the second carbon powder concentration detector 20 and the rotation speed detector. The controller controls the prompt part to act according to the first carbon powder concentration and the wear amount of the carbon brush. The air volume Q1 of the cooling fan 45 is proportional to the rotation speed n of the cooling fan 45. The wear amount W1 of the carbon brush is the product of the difference between the first carbon powder concentration and the second carbon powder concentration and the air volume of the cooling fan 45, that is, W1 = (ρ1 - ρ2) × Q1. Specifically, the second carbon powder concentration detector 20 is arranged in the nacelle 42 of the wind turbine. Since the air inhaled by the air inlet of the cooling fan 45 is the air in the nacelle 42, the difference between the first carbon powder concentration and the second carbon powder concentration is the actual concentration of the carbon powder formed after the carbon brush wears. Combining with the air volume of the air, the discharge amount of the carbon powder per unit time, that is, the wear amount of the carbon brush, can be calculated. If the total wear amount of the carbon brush calculated is greater than or equal to a certain threshold, it is determined that the carbon brush wears greatly and needs to be replaced. Specifically, Q1 = Kn, where K is the cross-sectional area of the carbon discharge pipe 44. The wind turbine includes a carbon discharge pipe 44 and a slip ring chamber 43. The carbon discharge pipe 44 is communicated with the slip ring chamber 43. The slip ring chamber 43 is provided with a slip ring and a carbon brush.

[0030] In this embodiment, the first carbon powder concentration detector 10 is arranged in the carbon discharge pipe 44 of the wind turbine. A carbon discharge port is opened on the slip ring chamber 43, and the carbon discharge port is connected to the carbon discharge pipe 44. For an in-service unit, only need to drill a hole in the carbon discharge pipe 44 to install the first carbon powder concentration detector 10, and the installation is simple. It can be understood that as an alternative embodiment, the first carbon powder concentration detector 10 is arranged in the slip ring chamber 43 of the wind turbine.

[0031] Specifically, the first carbon powder concentration detector 10 is a first carbon powder concentration sensor. The first carbon powder concentration sensor can monitor the concentration of carbon powder in the static or flowing air in the carbon discharge pipe 44, and the unit of the concentration of carbon powder is mg / l. The output signal of the first carbon powder concentration sensor can be an analog signal such as a voltage signal, a current signal, a frequency signal, etc., or a digital quantity signal such as modbus, Tcp / ip, etc. After the first carbon powder concentration sensor is converted into an analog quantity or a digital quantity output, it can be connected to the programmable logic controller (English abbreviation PLC) of the wind turbine to achieve the purpose of real-time monitoring of the carbon powder concentration. For example, under a certain power generation condition, when the concentration of carbon powder in the carbon discharge pipe 44 is greater than or equal to the first threshold, it is determined that the carbon brush wears abnormally under this condition, and the wear reason needs to be analyzed and countermeasures need to be taken. For example, the first threshold is 50mg / m 3 .

[0032] The second carbon powder concentration detection component 20 in the engine room 42 where the generator is located is a second carbon powder concentration sensor. Using the same method, the carbon powder concentration is converted into an analog or digital quantity and connected to the controller, which can monitor whether the carbon discharge pipe 44 is damaged or has poor sealing. For example, if the carbon powder concentration in the engine room 42 is greater than or equal to the second threshold value, it can be determined that there is carbon powder leakage in the carbon discharge pipe 44, and it is necessary to check for leakage points. For example, the second threshold value is 30mg / m 3 .

[0033] The present invention also provides a wind turbine, which includes: the above carbon brush wear monitoring device.

[0034] In this embodiment, as Figure 1 shown, the wind turbine further includes an engine room 42, a generator 41, a cooling fan 45, a slip ring chamber 43, a slip ring, a carbon brush, and a carbon discharge pipe 44, etc. The generator 41, the cooling fan 45, and the slip ring chamber 43 are all arranged in the engine room 42. The slip ring and the carbon brush are arranged in the slip ring chamber 43. The air inlet of the cooling fan 45 is communicated with the engine room 42, and the air outlet of the cooling fan 45 is communicated with the slip ring chamber 43. The carbon discharge pipe 44 is communicated with the slip ring chamber 43, and the carbon discharge pipe 44 is communicated with the external environment of the engine room 42. The cooling fan 45 sucks the air in the engine room 42 into the slip ring chamber 43, and the air can blow the carbon powder formed after the carbon brush wears into the carbon discharge pipe 44, and the carbon powder is discharged to the outside of the engine room 42 through the carbon discharge pipe 44. It should be noted that Figure 1 the solid arrows in Figure 1 refer to the carbon discharge path, and

[0035] For an in-service wind turbine, the first carbon powder concentration sensor of the carbon brush wear monitoring device is installed on the carbon discharge pipe 44 or in the slip ring chamber 43, and the second carbon powder concentration sensor of the carbon brush wear monitoring device is installed in the engine room 42. By monitoring the carbon powder concentration in the carbon discharge pipe 44, the carbon powder concentration in the engine room 42 and comparing with the threshold value, and comparing the estimated wear amount with the threshold value, the abnormal situation of the carbon powder can be monitored and corresponding countermeasures can be taken. Without modifying the carbon brush, the wear amount can be estimated; the working condition of large carbon brush wear can be diagnosed, and the diagnosis can be solved after analysis; the pollution of the generator and other components caused by carbon powder leakage can be avoided.

[0036] As Figure 2As shown, the present invention also provides a method for monitoring carbon brush wear. The method for monitoring carbon brush wear uses the above-mentioned carbon brush wear monitoring device, and the method for monitoring carbon brush wear includes the following steps: obtaining the first carbon powder concentration of the carbon powder formed after the carbon brush of the wind turbine is worn as detected by the first carbon powder concentration detector 10; controlling and issuing a prompt action according to the first carbon powder concentration. By adopting this method for monitoring carbon brush wear, the concentration of the carbon powder formed after the carbon brush of the wind turbine is worn can be detected in real time, and thus the wear amount of the carbon brush can be monitored in real time.

[0037] Preferably, the controller controls the prompt part to perform corresponding actions according to the first carbon powder concentration, so as to facilitate timely replacement of the carbon brush.

[0038] In this embodiment, the step of controlling and issuing a prompt action according to the first carbon powder concentration includes: judging whether the first carbon powder concentration is greater than or equal to the first threshold; when the first carbon powder concentration is greater than or equal to the first threshold, it is determined that the carbon brush wears too fast, and then the rotation speed of the cooling fan 45 of the wind turbine or the power of the wind turbine is adjusted; after adjusting the rotation speed of the cooling fan 45 or the power of the wind turbine and reaching the preset time, judge whether the first carbon powder concentration is greater than or equal to the first threshold. When the first carbon powder concentration is greater than or equal to the first threshold, control and issue a prompt action. When the carbon brush wears too fast, measures need to be taken to reduce the carbon brush wear speed, which can protect the carbon brush and extend the service life of the carbon brush. Adjusting the rotation speed of the cooling fan 45 of the wind turbine or the power of the wind turbine specifically means increasing the rotation speed of the cooling fan 45 or reducing the power of the generator. The higher the rotation speed of the cooling fan 45 is increased, the faster the air flow can be accelerated, and thus the carbon brush can be quickly cooled down to reduce the carbon brush wear speed; reducing the power of the generator can reduce the rotation speed of the rotor of the generator, and thus reduce the carbon brush wear speed. After taking measures to reduce the carbon brush wear speed and reaching the preset time, obtain the first carbon powder concentration detected by the first carbon powder concentration detector 10 at this time. If the first carbon powder concentration is still greater than or equal to the first threshold at this time, it is determined that the carbon brush wears greatly, and control and issue a prompt action, and the carbon brush needs to be replaced in time. For example, the rotation speed of the cooling fan is increased from 1300 rpm to 1400 rpm, and the power of the wind turbine is reduced from the rated power to 0.9 times the rated power. It can be understood that the rotation speed of the cooling fan 45 and the power of the wind turbine need to be determined according to specific situations and are not limited thereto.

[0039] Specifically, when the first carbon powder concentration is greater than or equal to the first threshold, control the prompt part to issue a prompt. The prompt part includes at least one of a light prompt device and a voice prompt device. At this time, the prompt is to remind the staff through light and / or voice. It can be understood that as an alternative implementation manner, the prompt part may not be provided, and the prompt may be a prompt message displayed on the display screen.

[0040] In this embodiment, when the first toner concentration is less than the first threshold, the second toner concentration detected by the second toner concentration detector 20 and the rotation speed of the cooling fan 45 are obtained; the wear amount of the carbon brush is determined according to the first toner concentration, the second toner concentration and the rotation speed of the cooling fan 45; a prompt action is controlled and issued according to the wear amount of the carbon brush; wherein, the air volume of the cooling fan 45 is proportional to the rotation speed of the cooling fan 45, and the wear amount of the carbon brush is the product of the difference between the first toner concentration and the toner concentration and the air volume of the cooling fan 45. Since the air inhaled by the air inlet of the cooling fan 45 is the air in the engine compartment 42, the difference between the first toner concentration and the second toner concentration is the actual concentration of the toner formed after the carbon brush wears, and combined with the air volume of the air, the discharge amount of the toner per unit time, which is also the wear amount of the carbon brush, can be calculated. The wear condition of the carbon brush can be accurately reflected according to the wear amount of the carbon brush, which is convenient for timely replacement of the carbon brush and can also extend the service life of the carbon brush.

[0041] In this embodiment, the steps of controlling and issuing a prompt action according to the wear amount of the carbon brush include: judging whether the wear amount of the carbon brush is greater than or equal to a preset wear amount; when the wear amount of the carbon brush is greater than or equal to the preset wear amount, it is determined that the carbon brush is worn greatly, and a prompt action is controlled and issued to remind the staff that the carbon brush needs to be replaced.

[0042] In this embodiment, when the wear amount of the carbon brush is less than the preset wear amount, it is judged whether the second toner concentration is greater than or equal to a second threshold; when the second toner concentration is greater than or equal to the second threshold, it is determined that the carbon discharge pipe 44 leaks and a prompt action is controlled and issued. Whether the carbon discharge pipe 44 leaks can be judged by monitoring the toner concentration in the engine compartment 42. When the carbon discharge pipe 44 leaks, the staff needs to repair the carbon discharge pipe 44 in time, which can protect other components in the engine compartment 42 and effectively avoid the pollution of the generator and other components caused by toner leakage.

[0043] The present invention also provides a storage medium, on which computer instructions are stored, and when the instructions are executed by a processor, the above-mentioned carbon brush wear monitoring method is implemented.

[0044] Specifically, the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD), etc.; the storage medium may also include a combination of the above-mentioned types of memories.

[0045] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0046] 1. A first toner concentration sensor is provided in the exhaust carbon tube 44, and a second toner concentration sensor is provided in the engine compartment 42. The toner concentration can be monitored, and then the wear amount of the carbon brush can be estimated through the air volume. Without modifying the carbon brush, the wear amount can be estimated, which is convenient for timely replacement of the carbon brush.

[0047] 2. By monitoring the toner concentration in the exhaust carbon tube 44, the working condition that has the greatest impact on the operation of the carbon brush can be judged, so as to extend the service life of the carbon brush.

[0048] 3. By monitoring the toner concentration in the engine compartment 42, it can be judged whether there is a leak in the exhaust carbon tube 44. The maintenance personnel can handle the toner leakage in real time to protect other components in the engine compartment and avoid pollution of the generator and other components caused by toner leakage.

[0049] Obviously, the above embodiments are only examples for clear illustration, and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A carbon brush wear monitoring device, characterized in that: include: A first carbon powder concentration detection element (10) is used to detect the concentration of carbon powder formed after the carbon brush of the wind turbine is worn; A prompting unit, used for issuing prompts; a controller electrically connected to the first toner concentration detection element (10) and the prompting unit, the controller controlling the action of the prompting unit according to the toner concentration detected by the first toner concentration detection element (10); A second carbon powder concentration detection element (20) for detecting the concentration of carbon powder in a nacelle (42) of a wind turbine generator; A rotation speed detection component, used to detect the rotation speed of a cooling fan (45) of the wind turbine; The toner concentration detected by the first toner concentration detector (10) is a first toner concentration, the toner concentration detected by the second toner concentration detector (20) is a second toner concentration, the controller is electrically connected to the second toner concentration detector (20) and the rotation speed detector, the controller controls the action of the prompting unit according to the first toner concentration and the amount of wear on the carbon brush, the air volume of the cooling fan (45) is proportional to the rotation speed of the cooling fan (45), and the amount of wear on the carbon brush is the product of the difference between the first toner concentration and the second toner concentration and the air volume of the cooling fan (45).

2. The carbon brush wear monitoring device according to claim 1, characterized in that: The first carbon powder concentration detection component (10) is arranged in a collector ring chamber (43) of the wind turbine generator, or the first carbon powder concentration detection component (10) is arranged in a carbon exhaust pipe (44) of the wind turbine generator, the collector ring chamber (43) is provided with a carbon exhaust port, and the carbon exhaust port is connected to the carbon exhaust pipe (44).

3. A wind turbine, characterized in that: include: The carbon brush wear monitoring device according to any one of claims 1 to 2.

4. A carbon brush wear monitoring method, characterized in that: The following steps are involved: Obtaining a first carbon powder concentration of carbon powder formed after a carbon brush of a wind turbine is worn; Controlling a prompt action according to the first toner concentration; The step of issuing a prompt action according to the first toner concentration control comprises: Determining whether the first toner concentration is greater than or equal to a first threshold; When the first carbon powder concentration is greater than or equal to the first threshold, adjusting the rotation speed of the cooling fan (45) of the wind turbine generator or the power of the wind turbine generator; After adjusting the rotation speed of the cooling fan (45) or the power of the wind turbine generator to reach a preset time, determining whether the first toner concentration is greater than or equal to a first threshold value, and when the first toner concentration is greater than or equal to the first threshold value, controlling a prompt action to be issued; When the first toner concentration is less than the first threshold value, obtaining a second toner concentration detected by a second toner concentration detection element (20) and a rotation speed of the cooling fan (45); determining the amount of wear of the carbon brush according to the first carbon powder concentration, the second carbon powder concentration and the rotation speed of the cooling fan (45); Controlling a prompt action according to the amount of wear of the carbon brush; The air volume of the cooling fan (45) is proportional to the rotation speed of the cooling fan (45), and the wear amount of the carbon brush is the product of the difference between the first carbon powder concentration and the second carbon powder concentration and the air volume of the cooling fan (45).

5. The carbon brush wear monitoring method according to claim 4, characterized in that: The step of controlling the prompt action according to the wear amount of the carbon brush comprises: Determining whether the wear amount of the carbon brush is greater than or equal to a preset wear amount; When the wear amount of the carbon brush is greater than or equal to the preset wear amount, the control sends a prompt action.

6. The carbon brush wear monitoring method according to claim 5, characterized in that: When the wear amount of the carbon brush is less than the preset wear amount, determining whether the second carbon powder concentration is greater than or equal to a second threshold; When the second carbon powder concentration is greater than or equal to the second threshold value, it is determined that the carbon exhaust pipe (44) is leaking and a prompt action is issued.

7. A storage medium having computer instructions stored thereon, characterized in that: When the computer instruction is executed by the processor, the carbon brush wear monitoring method described in any one of claims 4 to 6 is implemented.

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