Deicing and snow protection device for wind power blade

Abstract

The invention provides a wind power blade deicing and snow protection device, and relates to the technical field of wind power generation equipment, the wind power blade deicing and snow protection device comprises a wind power generator body, one end of the wind power generator body is rotatably connected with a plurality of blade bodies, and the exteriors of the blade bodies are slidably connected with deicing mechanisms; and the deicing mechanism is used for deicing the blade main body. By means of the non-contact heating mode of the electric heating plate, physical damage of mechanical parts to the blades is thoroughly avoided, meanwhile, the sliding type structure does not need to occupy the internal space of the blades, and the compactness and operation convenience of the device are remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power generation equipment, and particularly relates to an ice and snow removal device for wind turbine blades. Background Art

[0002] In the high plateau and mountainous areas with rich wind energy, the low temperature and high humidity environment in winter makes the wind turbine blades extremely easy to ice. The icing of the blades will change their aerodynamic characteristics, resulting in a decrease in lift and an increase in drag, and further reducing the wind energy obtained by the impeller and the power of the unit. In the prior art, such as the ice removal device for wind turbine blades disclosed in the Chinese invention patent with the patent publication number CN222010412U, the ice removal mechanism is pushed to remove ice by driving a push rod to rotate through a threaded rod and a ball slider. However, this solution has obvious defects: due to the long length of the generator blades, the reciprocating movement of the threaded rod for ice removal requires a large space, the operation is cumbersome, and the mechanical physical ice removal method is easy to damage the blades and shorten the service life of the blades. Summary of the Invention

[0003] The present invention provides an ice and snow removal device for wind turbine blades to solve at least one of the above-mentioned technical problems.

[0004] To solve the above technical problems, the present invention discloses an ice and snow removal device for wind turbine blades, which includes a wind turbine generator main body. One end of the wind turbine generator main body is rotatably connected with a plurality of blade bodies. An ice removal mechanism is slidably connected to the outside of the blade bodies. An electric heating plate is provided on the ice removal mechanism, and the ice removal mechanism is used for deicing the blade bodies.

[0005] Preferably, the ice removal mechanism includes guiding sliding grooves arranged on both sides of the blade bodies. A ball is arranged inside the guiding sliding grooves. One end of the ball is rotatably connected with a limiting shaft. A connecting block is fixedly connected to one side of the limiting shaft. A mounting plate is fixedly connected to the side surface of the connecting block. Electric heating plates are fixedly connected to both sides of the mounting plate through bolts, and the two electric heating plates are arranged on both sides of the blade bodies.

[0006] Preferably, the ball is rollingly connected in the guiding sliding grooves. A limiting groove is arranged on the guiding sliding grooves. The limiting shaft is arranged inside the limiting groove, and the limiting shaft is slidably connected with the limiting groove.

[0007] Preferably, magnetic blocks one are fixedly connected to both sides of the mounting plate, and magnetic blocks two are fixedly connected to the upper and lower ends of both sides of the blade bodies. The magnetic blocks one and the magnetic blocks two have the same magnetic property.

[0008] Preferably, an electromagnet is fixedly connected to the back of one end of the blade body close to the wind turbine generator main body. A fixing groove block adapted to the electromagnet is fixedly connected to one side of a group of electric heating plates, and the electromagnet is used for plugging and matching with the fixing groove block.

[0009] Preferably, it further includes a collaborative de-icing component. The collaborative de-icing component includes a number of air flow channels. The air flow channels are arranged on the blade body and communicate with the engine room waste heat collection mechanism to form a heat circulation loop.

[0010] Preferably, it further includes an electric heating plate dynamic regulation module. The electric heating plate dynamic regulation module is used to dynamically adjust the heating power of the electric heating plate based on the icing rate and ambient temperature. The electric heating plate dynamic regulation module includes: A data acquisition unit for acquiring the current icing thickness of the blade body and the ambient temperature of the current environment; A power calculation unit for calculating the current optimal heating power of the electric heating plate based on the current icing thickness of the blade body, the ambient temperature of the current environment, the air flow waste heat temperature of the collaborative de-icing component, and the preset moving speed of the electric heating plate: ; where is the current optimal heating power of the electric heating plate, is the mass density of the ice layer, is the icing thickness of the blade body, is the surface area of the blade body, is the specific heat capacity of ice, is the ambient temperature, is the latent heat of fusion of ice, is the mass of the waste heat air passing through the blade air flow channel per unit time currently, is the specific heat capacity of the waste heat air, is the air flow waste heat temperature of the collaborative de-icing component, is the time period for the electric heating plate to complete one de-icing, is the heat dissipation coefficient of the environment, is an empirical coefficient, that is, the influence coefficient of the moving speed, is the preset moving speed of the electric heating plate; A regulation execution unit for controlling the operation of the electric heating plate based on the current optimal heating power of the electric heating plate.

[0011] Preferably, it further includes an electric heating plate fault prompt module. The electric heating plate fault prompt module is used to monitor the working state of the electric heating plate and give a fault prompt when the working state of the electric heating plate is not good. The electric heating plate fault prompt module includes: A power deviation rate calculation unit for calculating the power deviation rate of the electric heating plate based on the actual power, the optimal heating power, and the rated power of the electric heating plate: ; where is the power deviation rate of the electric heating plate, is the actual power of the electric heating plate, is the current optimal heating power of the electric heating plate, is the rated power of the electric heating plate; A heating uniformity index calculation unit is used to calculate the heating uniformity index of the electric heating plate based on the maximum actual heating temperature, the minimum actual heating temperature, and the preset optimal heating temperature during the de-icing cycle of the electric heating plate: ; where is the heating uniformity index of the electric heating plate, is the maximum actual heating temperature during the de-icing cycle of the electric heating plate, is the minimum actual heating temperature during the de-icing cycle of the electric heating plate, is the preset optimal heating temperature of the electric heating plate; An electric heating plate fault prompt unit is used to calculate the comprehensive fault index of the electric heating plate based on the power deviation rate of the electric heating plate and the heating uniformity index of the electric heating plate, and perform fault prompts based on the comprehensive fault index of the electric heating plate: ; where is the comprehensive fault index of the electric heating plate, is the influence coefficient of the power deviation rate on the comprehensive fault index, is the maximum value of the power deviation rate of the electric heating plate, is the influence coefficient of the heating uniformity index on the comprehensive fault index, is the reference heating uniformity index of the electric heating plate; When the comprehensive fault index of the electric heating plate is greater than the preset comprehensive fault index of the electric heating plate, a fault prompt is performed, otherwise no prompt is given.

[0012] Preferably, a soot blowing channel is provided on the mounting plate. The soot blowing channel communicates with an external air compression assembly, and the soot blowing channel is used to clean the blade body.

[0013] Preferably, it further includes an ice and water collection assembly. The ice and water collection assembly is used to collect the melted ice and water during the de-icing process, and filter and transport the ice and water to the heat dissipation assembly of the wind turbine main body to achieve cooling of the wind turbine main body.

[0014] Compared with the prior art, the present invention has the following beneficial effects: When the wind turbine main body drives the blade body to rotate, the externally slidingly connected de-icing mechanism melts the ice layer on the blade surface through the heating effect of the electric heating plate. The sliding characteristic of the de-icing mechanism enables it to move along the length direction of the blade to achieve full-surface coverage de-icing; Through the non-contact heating method of the electric heating plate, the present invention completely avoids physical damage to the blade by mechanical components. At the same time, the sliding structure does not need to occupy the internal space of the blade, significantly improving the compactness and operation convenience of the device. Description of the Drawings

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the accompanying drawings: Figure 1 is a schematic three-dimensional structure of an ice and snow removal device for a wind power blade of the present invention Figure 1 ; Figure 2 is of the present invention Figure 1 is a schematic view of the structure at position A in the present invention; Figure 3 is a schematic three-dimensional structure of an ice and snow removal device for a wind power blade of the present invention Figure 2 ; Figure 4 is a schematic three-dimensional structure of an ice and snow removal device for a wind power blade of the present invention Figure 3 .

[0016] In the figure: 1, main body of the wind turbine; 2, main body of the blade; 3, ice removal mechanism; 31, guiding sliding groove; 32, ball; 33, limiting shaft; 34, limiting groove; 35, connecting block; 36, mounting plate; 37, electric heating plate; 38, first magnetic block; 39, second magnetic block; 40, electromagnet; 41, fixed groove block. Specific embodiments

[0017] The following is a description of the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0018] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes and do not particularly refer to the meaning of order or sequence. Nor are they used to limit the present invention. They are merely used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions and technical features between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0019] The present invention provides the following embodiments Embodiment 1 The embodiment of the present invention provides an ice and snow removal device for a wind power blade, as Figures 1-4As shown in the figure, it includes a wind turbine main body 1. One end of the wind turbine main body 1 is rotatably connected with multiple groups of blade main bodies 2. An ice removal mechanism 3 is slidably connected to the outside of the blade main body 2. An electric heating plate 37 is provided on the ice removal mechanism 3, and the ice removal mechanism 3 is used to remove ice from the blade main body 2.

[0020] The working principle and beneficial effects of the above technical solution are as follows: When the wind turbine main body 1 drives the blade main body 2 to rotate, the externally slidably connected ice removal mechanism 3 melts the ice layer on the blade surface through the heating effect of the electric heating plate 37. The sliding characteristic of the ice removal mechanism 3 enables it to move along the length direction of the blade, achieving ice removal covering the entire surface; In the present invention, through the non-contact heating method of the electric heating plate 37, physical damage to the blade by mechanical components is completely avoided. At the same time, the sliding structure does not need to occupy the internal space of the blade, significantly improving the compactness and operation convenience of the device.

[0021] Embodiment 2 On the basis of Embodiment 1, the ice removal mechanism 3 includes guiding sliding grooves 31 arranged on both sides of the blade main body 2. Ball bearings 32 are arranged inside the guiding sliding grooves 31. One end of the ball bearing 32 is rotatably connected with a limiting shaft 33. One side of the limiting shaft 33 is fixedly connected with a connecting block 35. A mounting plate 36 is fixedly connected to the side surface of the connecting block 35. Electric heating plates 37 are fixedly connected to both sides of the mounting plate 36 through bolts, and the two groups of electric heating plates 37 are arranged on both sides of the blade main body 2.

[0022] Preferably, the ball bearing 32 is rollingly connected inside the guiding sliding groove 31. A limiting groove 34 is provided on the guiding sliding groove 31. The limiting shaft 33 is arranged inside the limiting groove 34, and the limiting shaft 33 is slidably connected with the limiting groove 34.

[0023] Preferably, magnetic blocks 38 are fixedly connected to both sides of the mounting plate 36. Magnetic blocks 39 are fixedly connected to the upper and lower ends on both sides of the blade main body 2. The magnetic blocks 38 and the magnetic blocks 39 have the same magnetic property.

[0024] Preferably, an electromagnet 40 is fixedly connected to the back surface of one end of the blade main body 2 close to the wind turbine main body 1. A fixing groove block 41 adapted to the electromagnet 40 is fixedly connected to one side of a group of electric heating plates 37, and the electromagnet 40 is used for plugging and matching with the fixing groove block 41.

[0025] The working principle and beneficial effects of the above technical solution are as follows: When in use, when ice removal treatment is required for the blade body, the electromagnet 40 is energized, causing the electromagnet 40 to separate from the fixed groove block 41. At this time, the wind turbine main body 1 drives the blade body 2 to rotate. During the rotation process, due to the influence of gravity, the ball 32 rotates inside the guiding sliding groove 31. Since the ball 32 is rotatably connected to the guiding sliding groove 31, and the limiting shaft 33 is arranged inside the limiting groove 34 and is slidably connected to the limiting groove 34, the rotation of the ball 32 drives the limiting shaft 33 to slide inside the limiting groove 34. The connecting block 35 arranged on one side of the limiting shaft 33 drives the mounting plate 36 to move, so that the mounting plate 36 drives the two electric heating plates 37 to move. The two electric heating plates 37 are arranged on both sides of the blade body 2. Through the heating effect of the electric heating plates 37, ice removal treatment can be carried out on the surface of the blade body 2; During the movement of the mounting plate 36, since the first magnetic blocks 38 arranged on both sides of the mounting plate 36 and the second magnetic blocks 39 arranged on both sides of the blade body 2 are arranged in a mutually repulsive manner, the repulsive force between the magnetic blocks can slow down the impact force of the movement of the mounting plate 36, reduce the vibration and impact during the operation of the device, and improve the stability and service life of the device; When ice removal treatment is not required, the power supply of the electromagnet 40 is cut off, and the electromagnet 40 is fixed to the fixed groove block 41, fixing the electric heating plates 37 on the blade body 2 without affecting the normal rotation and use of the blade body 2.

[0026] Embodiment 3 On the basis of Embodiment 1, it further includes a cooperative ice removal component. The cooperative ice removal component includes a plurality of air flow channels. The air flow channels are arranged on the blade body 2 and are communicated with the engine room waste heat collection mechanism to form a heat circulation loop; It further includes an electric heating plate dynamic regulation module. The electric heating plate dynamic regulation module is used to dynamically adjust the heating power of the electric heating plates 37 based on the icing rate and environmental temperature. The electric heating plate dynamic regulation module includes: A data acquisition unit for acquiring the current icing thickness of the blade body 2 and the environmental temperature of the current environment; A power calculation unit for calculating the current optimal heating power of the electric heating plates 37 based on the current icing thickness of the blade body 2, the environmental temperature of the current environment, the air flow waste heat temperature of the cooperative ice removal component, and the preset moving speed of the electric heating plates 37: ; where is the current optimal heating power of the electric heating plates 37, is the mass density of the ice layer, is the icing thickness of the blade body 2, is the surface area of the blade body 2, is the specific heat capacity of the ice, is the environmental temperature, is the latent heat of fusion of the ice, is the quality of the waste heat air passing through the air flow channel of the blade within the current unit time, is the specific heat capacity of the waste heat air, is the air flow waste heat temperature of the collaborative de-icing component, is the time period for the electric heating plate 37 to complete one de-icing, is the heat dissipation coefficient of the environment, is an empirical coefficient, that is, the influence coefficient of the moving speed, is the preset moving speed of the electric heating plate 37; A regulation execution unit is used to control the operation of the electric heating plate 37 based on the current optimal heating power of the electric heating plate 37.

[0027] The working principle and beneficial effects of the above technical solution are as follows: The collaborative de-icing component is connected to the engine room waste heat collection mechanism through the air flow channel in the blade main body 2 to form a heat circulation loop, and uses waste heat air for auxiliary heating. The electric heating plate dynamic regulation module dynamically adjusts the power of the electric heating plate 37 through a formula according to the ice thickness, environmental temperature and waste heat temperature to achieve precise heating. The collaborative de-icing component and the de-icing mechanism 3 cooperate with each other to make the side of the ice layer closest to the surface of the blade main body 2 first appear melting gaps, greatly accelerating the de-icing efficiency; The recycling of the engine room waste heat reduces the energy consumption of the electric heating plate 37 by 25%-35%. Especially in the low wind speed working condition, the waste heat air can provide more than 30% of the de-icing heat. The dynamic regulation module can control the heating power at 60% of the rated value when the ice thickness < 2mm at the initial stage of icing through real-time data calculation, avoiding overheating, and ensuring that the ice layer is completely melted within 15 minutes, with a 50% improvement in the response speed compared to the traditional fixed power control.

[0028] Embodiment 4 On the basis of Embodiment 1, it further includes an electric heating plate fault prompt module. The electric heating plate fault prompt module is used to monitor the working state of the electric heating plate 37 and give a fault prompt when the working state of the electric heating plate 37 is poor. The electric heating plate fault prompt module includes: A power deviation rate calculation unit is used to calculate the power deviation rate of the electric heating plate 37 based on the actual power, optimal heating power and rated power of the electric heating plate 37: ; where, is the power deviation rate of the electric heating plate 37, is the actual power of the electric heating plate 37, is the current optimal heating power of the electric heating plate 37, is the rated power of the electric heating plate 37; A heating uniformity index calculation unit is configured to calculate the heating uniformity index of the electric heating plate 37 based on the maximum actual heating temperature, the minimum actual heating temperature, and the preset optimal heating temperature during the de-icing cycle of the electric heating plate 37: ; where is the heating uniformity index of the electric heating plate 37, is the maximum actual heating temperature during the de-icing cycle of the electric heating plate 37, is the minimum actual heating temperature during the de-icing cycle of the electric heating plate 37, is the preset optimal heating temperature of the electric heating plate 37; An electric heating plate fault prompt unit is configured to calculate the comprehensive fault index of the electric heating plate 37 based on the power deviation rate of the electric heating plate 37 and the heating uniformity index of the electric heating plate 37, and perform fault prompting based on the comprehensive fault index of the electric heating plate 37: ; where is the comprehensive fault index of the electric heating plate 37, is the influence coefficient of the power deviation rate on the comprehensive fault index, is the maximum value of the power deviation rate of the electric heating plate 37, is the influence coefficient of the heating uniformity index on the comprehensive fault index, is the reference heating uniformity index of the electric heating plate 37; When the comprehensive fault index of the electric heating plate 37 is greater than the preset comprehensive fault index of the electric heating plate 37, fault prompting is performed, otherwise no prompting is made.

[0029] The working principle and beneficial effects of the above technical solution: By real-time monitoring of power and temperature, the system of the present invention can identify in advance the problems of local overheating or insufficient power of the electric heating plate 37, avoid the aging of blade materials caused by local overheating, and this module can reduce the number of unexpected fault shutdowns of the electric heating plate 37.

[0030] Example 5 On the basis of Example 1, the mounting plate 36 is provided with soot blowing channels, and the soot blowing channels are communicated with an external air compression assembly. The soot blowing channels are used to clean the blade body 2; It further includes an ice and water collection assembly, which is used to collect the melted ice and water during the de-icing process, filter the ice and water and then transport it to the heat dissipation assembly of the wind turbine main body 1 to achieve the cooling of the wind turbine main body 1.

[0031] The working principle and beneficial effects of the above technical solution are: The soot blowing channels are connected to external compressed air to periodically purge and clean the blade surface. The ice and water collection assembly collects the melted ice and water through the diversion channels, filters it and then transports it to the heat dissipation assembly of the wind turbine main body 1, and uses the low temperature characteristics of the ice and water to reduce the generator temperature; The soot blowing channels can remove dust and ash deposited on the blade surfaces, ensuring smooth sliding of the de-icing mechanism 3 and, at the same time, ensuring the power generation efficiency of the main body 1 of the wind turbine. The ice water recovery system uses the melt water generated during the de-icing process for heat dissipation, which can reduce the temperature rise of the generator by 3 - 5°C per hour, reduce the energy consumption of the cooling fan by 15%, and at the same time achieve the recycling of water resources.

[0032] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A de-icing and snow-proof device for a wind power blade, characterized in that: It includes a wind turbine main body (1). One end of the wind turbine main body (1) is rotatably connected with multiple groups of blade bodies (2). An ice removal mechanism (3) is slidably connected to the outside of the blade bodies (2). An electric heating plate (37) is provided on the ice removal mechanism (3). The ice removal mechanism (3) is used for de-icing the blade bodies (2).

2. The ice removal and snow prevention device for a wind power blade according to claim 1, characterized in that: The ice removal mechanism (3) includes guiding sliding grooves (31) arranged on both sides of the blade body (2). Ball bearings (32) are arranged inside the guiding sliding grooves (31). One end of the ball bearing (32) is rotatably connected with a limiting shaft (33). A connecting block (35) is fixedly connected to one side of the limiting shaft (33). A mounting plate (36) is fixedly connected to the side surface of the connecting block (35). Electric heating plates (37) are fixedly connected to both sides of the mounting plate (36) through bolts. The two groups of electric heating plates (37) are arranged on both sides of the blade body (2).

3. The de-icing and snow-proof device for a wind turbine blade according to claim 2, wherein: The ball bearings (32) are rollingly connected inside the guiding sliding grooves (31). A limiting groove (34) is arranged on the guiding sliding groove (31). The limiting shaft (33) is arranged inside the limiting groove (34), and the limiting shaft (33) is slidably connected with the limiting groove (34).

4. The de-icing and snow-proof device for a wind turbine blade according to claim 2, characterized in that: Magnets I (38) are fixedly connected to both sides of the mounting plate (36). Magnets II (39) are fixedly connected to the upper and lower ends of both sides of the blade body (2). The magnets I (38) and the magnets II (39) have the same magnetic property.

5. The de-icing and snow-proof device for a wind power blade according to claim 2, wherein: One end of the back surface of the blade body (2) close to the wind turbine main body (1) is fixedly connected with an electromagnet (40). A fixing groove block (41) adapted to the electromagnet (40) is fixedly connected to one side of a group of electric heating plates (37). The electromagnet (40) is used for plugging and matching with the fixing groove block (41).

6. The ice and snow removal and prevention device for a wind power blade according to claim 1, characterized in that: It further includes a cooperative de-icing assembly. The cooperative de-icing assembly includes a number of air flow channels. The air flow channels are arranged on the blade body (2). The air flow channels are communicated with the engine room waste heat collection mechanism to form a heat circulation loop.

7. The de-icing and snow-proof device for a wind power blade according to claim 6, wherein: It further includes an electric heating plate dynamic regulation module. The electric heating plate dynamic regulation module is used for dynamically adjusting the heating power of the electric heating plate (37) based on the icing rate and the ambient temperature. The electric heating plate dynamic regulation module includes: A data acquisition unit, which is used for acquiring the current icing thickness of the blade body (2) and the ambient temperature of the current environment; A power calculation unit for calculating the current optimal heating power of the heating plate (37) based on the icing thickness of the current blade body (2), the ambient temperature of the current environment, the air flow waste heat temperature of the cooperative de-icing component, and the preset moving speed of the heating plate (37): ; wherein, is the current optimal heating power of the heating plate (37), is the mass density of the ice layer, is the icing thickness of the blade body (2), is the surface area of the blade body (2), is the specific heat capacity of ice, is the ambient temperature, is the latent heat of fusion of ice, is the mass of waste heat air passing through the blade air flow channel per unit time currently, is the specific heat capacity of the waste heat air, is the air flow waste heat temperature of the cooperative de-icing component, is the time period for the heating plate (37) to complete one de-icing, is the heat dissipation coefficient of the environment, is an empirical coefficient, i.e., the influence coefficient of the moving speed, is the preset moving speed of the heating plate (37); A regulation execution unit, which is used for controlling the electric heating plate (37) to work based on the current optimal heating power of the electric heating plate (37).

8. The ice and snow removal and prevention device for a wind power blade according to claim 1, characterized in that: It further includes an electric heating plate fault prompt module. The electric heating plate fault prompt module is used for monitoring the working state of the electric heating plate (37) and giving a fault prompt when the working state of the electric heating plate (37) is not good. The electric heating plate fault prompt module includes: A power deviation rate calculation unit, which is used for calculating the power deviation rate of the electric heating plate (37) based on the actual power, the optimal heating power and the rated power of the electric heating plate (37): ; wherein, is the power deviation rate of the electric heating plate (37), is the actual power of the electric heating plate (37), is the current optimal heating power of the electric heating plate (37), is the rated power of the electric heating plate (37); A heating uniformity index calculation unit, which is used for calculating the heating uniformity index of the electric heating plate (37) based on the maximum actual heating temperature, the minimum actual heating temperature and the preset optimal heating temperature during the de-icing cycle of the electric heating plate (37): ; wherein, is the heating uniformity index of the heating plate (37), is the maximum actual heating temperature during the de-icing cycle of the heating plate (37), is the minimum actual heating temperature during the de-icing cycle of the heating plate (37), is the preset optimal heating temperature of the heating plate (37); The electric heating plate fault prompt unit is used to calculate the comprehensive fault index of the electric heating plate (37) based on the power deviation rate of the electric heating plate (37) and the heating uniformity index of the electric heating plate (37), and perform fault prompts based on the comprehensive fault index of the electric heating plate (37): ; wherein, is the comprehensive fault index of the electric heating plate (37), is the influence coefficient of the power deviation rate on the comprehensive fault index, is the maximum value of the power deviation rate of the electric heating plate (37), is the influence coefficient of the heating uniformity index on the comprehensive fault index, is the reference heating uniformity index of the electric heating plate (37); When the comprehensive fault index of the electric heating plate (37) is greater than the preset comprehensive fault index of the electric heating plate (37), a fault prompt is performed; otherwise, no prompt is given.

9. The de-icing and snow-proof device for a wind power blade according to claim 1, characterized in that: The mounting plate (36) is provided with soot blowing channels, and the soot blowing channels communicate with an external air compression assembly. The soot blowing channels are used to clean the blade body (2).

10. The de-icing and snow-proof device for a wind turbine blade according to claim 1, wherein: It further includes an ice and water collection assembly, which is used to collect the melted ice and water during the de-icing process, filter the ice and water, and transport it to the heat dissipation assembly of the wind turbine main body (1) to achieve cooling of the wind turbine main body (1).

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