Wind power blade deicing method, system and equipment and storage medium

Abstract

The invention belongs to the field of wind power generation, and particularly relates to a wind power blade deicing method, system and equipment and a storage medium, whether the surface of a wind power blade is iced or not is judged by collecting the actual average temperature rise rate and the standard temperature rise rate of the wind power blade, then the wind power blade is heated under the icing condition, and according to different icing thicknesses, the wind power blade is deiced. According to the method, different temperature parameters are determined to judge whether ice on the wind power blade is melted or not, and different temperature parameters are selected under different ice thicknesses, so that whether the ice is melted or not can be accurately and effectively determined, and therefore, the time for closing the heating film can be accurately obtained; energy consumption during heating can be saved, and the situation that the temperature of the wind power blade is too high due to continuous heating can be prevented.

Description

Technical Field

[0001] The present invention belongs to the field of wind power generation, and in particular relates to a wind power blade deicing method, system, equipment and storage medium. Background Art

[0002] As a clean energy, wind power is widely used in wind power generation. However, in some low-temperature areas, wind power generation blades will freeze. After the blades are frozen, the load of the wind turbine will increase, affecting the life of the blades. In addition, the ice load on each blade is different, which increases the unbalanced load of the unit. Continuing to operate when the blades are frozen will cause great harm to the unit. When the ice is serious, the unit has to be disconnected from the grid and shut down, which greatly reduces the utilization rate of the unit in low-temperature areas for a long time. Therefore, it is necessary to remove the ice on the blades after the blades are frozen.

[0003] In the related art, heating is mainly used to treat ice on wind turbine blades. Ice sensors installed on the wind turbine blades are used to monitor whether ice is formed on the wind turbine blades. If ice is formed, heating is performed to melt the ice on the wind turbine blades. The heating program is then turned off after the ice melts and falls off.

[0004] With respect to the above-mentioned related technologies, during the heating process, an ice cover sensor is used to detect whether the ice layer has melted. Since the thickness of the ice layer is not very thick, the monitoring result is inaccurate, which may cause the heating time to be too long and consume unnecessary energy. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a wind turbine blade deicing method, system, equipment and storage medium, which can achieve deicing with minimum energy consumption and ensure the normal operation of the wind turbine blades.

[0006] A wind turbine blade deicing method, comprising:

[0007] Heating the wind turbine blades to obtain an actual average heating rate of the wind turbine blades;

[0008] If the actual average heating rate is less than the standard average heating rate, it is confirmed that the wind turbine blades are frozen, and a heating program is started to heat the wind turbine blades;

[0009] Obtain the ice thickness on the wind turbine blades;

[0010] Determining a temperature parameter of the wind turbine blade according to the ice thickness, and judging whether the ice on the wind turbine blade has melted according to the temperature parameter;

[0011] If the ice has not melted, increase the de-icing heating power.

[0012] Optionally, the ice coating thickness includes a first range, a second range and a third range, and the ice coating thicknesses in the first range, the second range and the third range increase sequentially.

[0013] Optionally, determining a temperature parameter of the wind turbine blade according to the ice thickness, and judging whether the ice on the wind turbine blade has melted according to the temperature parameter includes:

[0014] When the ice thickness is within the first range, obtaining a first temperature fluctuation of an ice-covered area on the wind turbine blade and a second temperature fluctuation of an un-ice-covered area on the wind turbine blade, wherein the first temperature fluctuation and the second temperature fluctuation are the temperature parameters;

[0015] Determining whether the first temperature fluctuation is less than a preset first fluctuation value and whether the second temperature fluctuation is greater than a preset second fluctuation value;

[0016] If the first temperature fluctuation is smaller than a first fluctuation value and the second temperature fluctuation is larger than a second fluctuation value, it is determined that the ice covering the wind turbine blade has melted.

[0017] Optionally, determining a temperature parameter of the wind turbine blade according to the ice thickness, and judging whether the ice on the wind turbine blade has melted according to the temperature parameter includes:

[0018] When the ice thickness is within the second range, obtaining the temperature fluctuation at the end of the last minute of heating within the preset heating time period, and using the temperature fluctuation at the end as the temperature parameter;

[0019] Determining whether the absolute value of the end temperature fluctuation is less than a preset end fluctuation value;

[0020] If the absolute value of the end temperature fluctuation is less than the end fluctuation value, it is determined that the ice covering the wind turbine blades has melted;

[0021] If the absolute value of the terminal temperature fluctuation is greater than or equal to the terminal fluctuation value, it is determined that the ice covering the wind turbine blades has not melted.

[0022] Optionally, determining a temperature parameter of the wind turbine blade according to the ice thickness, and judging whether the ice on the wind turbine blade has melted according to the temperature parameter includes:

[0023] When the ice coating thickness is within the third range, determining the temperature parameter of the wind turbine blade according to the ice coating thickness, and judging whether the ice coating on the wind turbine blade has melted according to the temperature parameter includes:

[0024] When the ice thickness is within the third range, a third average heating rate when the temperature of the wind turbine blade rises to zero degrees, a temperature fluctuation per minute in a preset heating time period after the temperature rises to 0 degrees, and a fourth average heating rate in the preset heating time period are obtained, and the third average heating rate, the fourth average heating rate and the temperature fluctuation are used as temperature parameters;

[0025] Determining whether the temperature fluctuation is greater than a preset third fluctuation value or whether the fourth average heating rate is greater than the third average heating rate;

[0026] If the temperature fluctuation is greater than the third fluctuation value or the fourth average temperature rise rate is greater than the third average temperature rise rate, it is determined that the ice on the wind turbine blade has melted.

[0027] Optionally, the first range is an ice coating thickness of less than 2 mm, the second range is an ice coating thickness of 2 mm-7 mm, and the third range is an ice coating thickness of greater than 7 mm.

[0028] Optionally, if the ice has not melted, increasing the de-icing heating power includes:

[0029] When the ice thickness is within a third range, turning on the second heating film and the first heating film;

[0030] When the ice thickness is within the first range or the second range, turning on the first heating film and increasing the deicing heating power;

[0031] The first heating film is close to the leading edge of the wind turbine blade, and the second heating film is located on a side of the wind turbine blade close to the trailing edge of the wind turbine blade and close to the tip of the wind turbine blade.

[0032] A wind turbine blade deicing system, comprising:

[0033] Heating the wind turbine blades to obtain an actual average heating rate;

[0034] Determining whether the absolute value of the difference between the actual average heating rate and the standard average heating rate is within a first preset range;

[0035] If the absolute value of the difference between the actual average heating rate and the standard average heating rate is not within the first preset range, it is confirmed that the wind turbine blade is frozen, and a heating program is started to heat the wind turbine blade;

[0036] Obtain the ice thickness on the wind turbine blades;

[0037] Determining a temperature parameter of the wind turbine blade according to the ice thickness, and judging whether the ice on the wind turbine blade has melted according to the temperature parameter;

[0038] If the ice has not melted, increase the de-icing heating power.

[0039] A wind turbine blade deicing system, comprising:

[0040] A first acquisition module is used to heat the wind turbine blades to obtain an actual average heating rate;

[0041] A heating module, configured to confirm that the wind turbine blades are frozen and start a heating program to heat the wind turbine blades if the actual average heating rate is less than the standard average heating rate;

[0042] The second acquisition module is used to obtain the ice thickness on the wind turbine blades;

[0043] A judgment module, used to determine a temperature parameter of the wind turbine blade according to the ice thickness, and judge whether the ice on the wind turbine blade has melted according to the temperature parameter;

[0044] The execution module is used to increase the de-icing heating power if the ice has not melted.

[0045] A terminal device comprises a memory and a processor. The memory stores a computer program that can be run on the processor. When the processor loads and executes the computer program, a wind turbine blade deicing method is adopted.

[0046] A computer-readable storage medium stores a computer program. When the computer program is loaded and executed by a processor, a wind turbine blade deicing method is adopted.

[0047] The beneficial effects of the present invention are:

[0048] Whether the surface of the wind turbine blade is frozen is determined by collecting the actual average heating rate and the standard heating rate of the wind turbine blade. Then, in the case of ice, the wind turbine blade is heated. Different temperature parameters are determined according to different ice thicknesses to determine whether the ice on the wind turbine blade has melted. When the ice thickness is in the first range, whether the ice on the wind turbine blade has melted is determined according to the temperature fluctuation per unit time after the temperature rises to 0 degrees. In the second range, after heating to 0 degrees, whether the ice has melted is determined according to the temperature fluctuation in the last minute of the preset time period. If the temperature fluctuation in the last minute is greater than the preset ending fluctuation value, it indicates that the ice has melted. In the third range, if the temperature fluctuation is greater than the third fluctuation value or the fourth average heating rate is greater than the third average heating rate, it is determined that the ice on the wind turbine blade has melted. Under different ice thicknesses, different temperature parameters are selected to accurately and effectively determine whether the ice has melted, thereby accurately obtaining the time to turn off the heating film, which can save energy consumption during heating and prevent the wind turbine blade from overheating due to continuous heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1It is a schematic diagram of the structure of the wind turbine blade of the present invention;

[0050] Figure 2 A schematic diagram of a process of deicing a wind turbine blade according to the present invention;

[0051] Figure 3 This is a schematic diagram of the temperature change of a wind turbine blade when ice with a thickness of less than 2 mm melts according to the present invention;

[0052] Figure 4 This is a schematic diagram of the temperature change of a wind turbine blade when ice with a thickness of 2mm-7mm melts according to the present invention;

[0053] Figure 5 This is a schematic diagram of the temperature change of a wind turbine blade when ice with a thickness of more than 7 mm melts according to the present invention;

[0054] Explanation of the reference numerals: 1. wind turbine blade; 2. first heating film; 3. second heating film. DETAILED DESCRIPTION

[0055] A wind turbine blade deicing device includes: Figure 1 As shown, a deicing unit is located on a wind turbine blade, and the deicing unit includes a first heating film and a second heating film; the first heating film is close to the leading edge of the wind turbine blade, and the second heating film is located on the side of the wind turbine blade close to the trailing edge of the wind turbine blade and close to the tip of the wind turbine blade.

[0056] Specifically, the leading edge position of the wind turbine blade ( Figure 1 The red line in the middle refers to the edge of the blade that first contacts the wind flow when rotating, that is, the side of the blade edge close to the wind. It is the first contact point for converting wind energy into mechanical energy. From the perspective of airfoil structure, the leading edge is usually circular, and the first point of the arc line in the airfoil is called the leading edge of the airfoil. The trailing edge of the wind turbine blade ( Figure 1 The middle blue line position) refers to the edge of the blade that last contacts the wind flow when rotating, that is, the side of the blade edge facing away from the wind. In the airfoil structure, the trailing edge is usually sharp, and the last point of the arc line of the airfoil is called the trailing edge of the airfoil.

[0057] During the operation of wind turbine blades, the leading edge of the wind turbine blades is usually prone to ice formation, so the first heating film is laid near the leading edge of the wind turbine blades, and the second heating film is located on the side of the wind turbine blades near the trailing edge of the wind turbine blades and near the blade tip. During the actual laying, since there are many devices at the root of the blade, the heating film is usually laid near the blade tip.

[0058] A wind turbine blade deicing method, such as Figure 2 As shown, the present invention includes:

[0059] S100: heating the wind turbine blades to obtain an actual average heating rate.

[0060] Specifically, the actual average heating rate refers to the temperature change per unit time during the temperature rise process within a period of time when the currently running wind turbine blades are heated. The actual average heating rate is collected when the temperature of the wind turbine blades is below 0 degrees.

[0061] S110: If the actual average heating rate is less than the standard average heating rate, it is determined that the wind turbine blades are frozen, and a heating program is started to heat the wind turbine blades.

[0062] Specifically, the standard average heating rate refers to the data of the temperature change of the wind turbine blade over time collected when the wind turbine blade is heated when the wind turbine blade is not frozen, and the temperature curve is plotted. The average heating rate can be calculated through the temperature curve. In this implementation, the standard heating rate is obtained by gradually heating when the blade is not frozen, the ambient humidity is greater than 85%, the length of the wind turbine blade is 98m, the power generation is 5.56MW-6.25MW, the operating wind speed is generally 3-25m / s, and the ambient temperature is below 5 degrees. The commonly used heating power is 1000w.

[0063] Specifically, the first preset range is a temperature error value for determining whether a wind turbine blade is frozen. In this embodiment, the first preset range is set to 0.1°C. The first preset range is to prevent errors caused by the device itself when collecting temperature or errors caused by ambient temperature.

[0064] S120: Obtain the ice thickness on the wind turbine blades.

[0065] Specifically, the ice thickness on the wind turbine blades is the ice thickness roughly obtained by the ice sensor. Under different ice thicknesses, the way of judging the melting of the ice is different. In this embodiment, the ice thickness is divided into a first range, a second range and a third range. The ice thicknesses in the first range, the second range and the third range increase successively. Specifically, the first range is an ice thickness less than 2 mm, the second range is an ice thickness between 2 mm and 7 mm, and the third range is an ice thickness greater than 7 mm.

[0066] S130: Determine a temperature parameter of the wind turbine blade according to the ice thickness, and determine whether the ice on the wind turbine blade has melted according to the temperature parameter.

[0067] Specifically, during the heating process, temperature parameters on the wind turbine blades are collected, such as an average heating rate, temperature fluctuations within a certain period of time, etc., to determine whether the ice covering the wind turbine blades has melted.

[0068] S140: If the ice has not melted, increase the de-icing heating power.

[0069] Specifically, if the ice covering the wind turbine blades has not melted, the deicing heating power of the first heating film is increased to melt the ice covering.

[0070] In one implementation manner of this embodiment, step S140, i.e., determining the temperature parameter of the wind turbine blade according to the ice thickness, and judging whether the ice on the wind turbine blade has melted according to the temperature parameter, includes:

[0071] S200. When the ice thickness is within the first range, obtain a first temperature fluctuation after the temperature of the ice-covered area on the wind turbine blade rises to 0 degrees and a second temperature fluctuation after the temperature of the non-ice-covered area on the wind turbine blade rises to 0 degrees, wherein the first temperature fluctuation and the second temperature fluctuation are the temperature parameters.

[0072] S210: Determine whether the first temperature fluctuation is less than a preset first fluctuation value and whether the second temperature fluctuation is greater than a preset second fluctuation value.

[0073] S220: If the first temperature fluctuation is smaller than a first fluctuation value and the second temperature fluctuation is larger than a second fluctuation value, it is determined that the ice covering the wind turbine blade has melted.

[0074] Specifically, when the ice on the surface of the wind turbine blade is thin (less than 2 mm), after the heating is turned on, the heat provided is used for: heat absorption by the blade body, heat absorption by phase change of ice melting, heat absorption by overall temperature rise of the ice, and convection heat exchange and radiation with the air. During the heating process, the ice gradually melts. Figure 3 As shown, at a certain moment ( Figure 3 When the ice on the blade melts completely (at point B), the blade will directly exchange heat with the environment through convection and radiation, and the heat exchange to the outside will increase, causing the surface temperature to first drop and then level off. Therefore, when the temperature drops significantly, it means that the de-icing is complete.

[0075] During the ice-covered blade heating process, it is necessary to determine whether the temperature has risen to 0°C. If it has not risen to 0°C, continue heating; if it has risen to 0°C, continue heating for 5 minutes, and calculate the first temperature fluctuation △T1 per minute in the ice-covered area and the second temperature fluctuation △T2 per minute in the un-ice-covered area. If the temperature fluctuation △T1 < 0.5°C and △T2 > 1°C occurs, it means that the thin ice covering the surface has completely melted, and the de-icing is completed and the heating program is turned off. The preset first fluctuation value and the second fluctuation value are selected based on past experimental data. In different environments and wind turbine blades of different sizes, the preset first fluctuation value and the second fluctuation value have different values.

[0076] Compared with judging only by the ice sensor, since the thickness of the ice cover itself is not thick, the ice sensor cannot obtain accurate values ​​at all, which may result in the failure to timely and accurately monitor the situation of still heating after the ice cover melts. Judging whether the ice cover has melted by the temperature parameters on the blade surface can more accurately judge whether the ice cover has melted, thereby obtaining the accurate time to shut down the heating film and saving energy.

[0077] In one implementation manner of this embodiment, step S140, i.e., determining the temperature parameter of the wind turbine blade according to the ice thickness, and judging whether the ice on the wind turbine blade has melted according to the temperature parameter, includes:

[0078] S300, when the ice thickness is in the second range (2-7 mm), obtaining the temperature fluctuation at the end of the last minute of heating in a preset heating time period, and using the temperature fluctuation at the end as a temperature parameter;

[0079] S310: Determine whether the absolute value of the end temperature fluctuation is less than a preset end fluctuation value.

[0080] S320: If the absolute value of the terminal temperature fluctuation is smaller than the terminal fluctuation value, it is determined that the ice covering the wind turbine blades has melted.

[0081] S330: If the absolute value of the terminal temperature fluctuation is greater than or equal to the terminal fluctuation value, it is determined that the ice covering the wind turbine blades has not melted.

[0082] Specifically, Figure 4 As shown in the figure, when the blade is in a static state for de-icing, the ice gradually slides down under its own gravity after being heated until it falls off. However, when the ice is thin, it may not fall off in time after being heated. The ice on the blade surface is generally wrapped, and the closer to the trailing edge, the thinner the ice and the easier it is to be in a clear ice state. This means that after the heating film near the leading edge is heated under normal conditions, the melted water inside cannot be discharged in time, resulting in a large adhesion between the ice and the blade, which cannot fall off in time. For this reason, the temperature of the ice area after point B has been around 0°C.

[0083] Under normal conditions, the first heating film 2 of the blade is turned on. During the heating process of the blade covered with ice, it is necessary to determine whether the temperature rises to 0°C. If it does not rise to 0°C, continue heating; if it rises to 0°C, continue heating for 5 minutes, and calculate the temperature fluctuation △T per minute. If the temperature fluctuation △T difference within the 5th minute is less than 0.5°C (the preset end fluctuation value), it means that the ice layer has not fallen off in time after heating, then turn on the second heating film of the blade and continue heating. If the temperature fluctuation △T within the 5th minute is greater than 0.5°C, it means that the de-icing of the blade surface is completed. The end fluctuation value can be modified according to the actual environment and the size of the wind turbine blade.

[0084] In one implementation manner of this embodiment, step S140, i.e., determining the temperature parameter of the wind turbine blade according to the ice thickness, and judging whether the ice on the wind turbine blade has melted according to the temperature parameter, includes:

[0085] S400, when the ice thickness is within the third range (7 mm or more), obtaining a third average heating rate when the temperature of the wind turbine blade rises to zero degrees, a temperature fluctuation per minute in a preset heating time period after the temperature rises to 0 degrees, and a fourth average heating rate in the preset heating time period, and the third average heating rate, the fourth average heating rate and the temperature fluctuation are used as temperature parameters;

[0086] S410, determining whether the temperature fluctuation is greater than a preset third fluctuation value or whether the fourth average heating rate is greater than the third average heating rate;

[0087] S420: If the temperature fluctuation is greater than the third fluctuation value or the fourth average heating rate is greater than the third average heating rate, it is determined that the ice covering the wind turbine blades has melted.

[0088] Specifically, when the blades begin to ice up and heat, it is necessary to determine whether the temperature has risen to 0°C. If not, continue heating; if it has risen to 0°C, calculate the average heating rate V3 (third average heating rate) from the start of heating to the time it reaches 0°C. Then continue heating for 5 minutes (preset time period), and calculate the temperature fluctuation △T (temperature fluctuation) and the heating rate V4 (fourth average heating rate) per minute. Figure 5 As shown in the figure, if the temperature fluctuation is greater than 2°C or V4 is greater than V3 within a certain minute, it means that the ice layer has fallen and the surface temperature has risen, and the de-icing is completed. If the above situation does not occur, it means that the de-icing is not completed, which means that the ice is difficult to fall under this heating power. Consider increasing the heating power within the safety range and heating for another 5 minutes until the de-icing is completed and the heating system is turned off. The third fluctuation value is set based on historical experience and can be modified according to actual conditions.

[0089] In one implementation of this embodiment, step S140, i.e., if the ice is not melted, increasing the de-icing heating power, includes:

[0090] S500: When the ice coating thickness is within a second range, turn on the second heating film and the first heating film.

[0091] S510, when the ice thickness is within the first range or the third range, turning on the first heating film and increasing the deicing heating power;

[0092] The first heating film is close to the leading edge of the wind turbine blade, and the second heating film is located on a side of the wind turbine blade close to the trailing edge of the wind turbine blade and close to the tip of the wind turbine blade.

[0093] Specifically, under normal circumstances, it is only necessary to turn on the first heating film of the blade for heating. When the surface ice cannot fall off in time, that is, when the blade is in a static state for de-icing, the ice will gradually slide down under its own gravity after being heated until it falls off. However, when the ice is thin, the ice may not fall off in time after being heated. Among them, the ice on the surface of the blade is generally in the form of a wrap, and the closer to the trailing edge, the thinner the ice and the easier it is to be in a clear ice state. This makes it impossible for the melted water inside the heating film close to the leading edge to be discharged in time after being heated under normal conditions, resulting in a large adhesion between the ice and the blade, and it cannot fall off in time. For this reason, the temperature of the iced area is always around 0°C after the ice melts. At this time, the second heating film is turned on to melt the trailing edge of the ice, and the internal melted water flows out, reducing the adhesion between the ice and the blade, and accelerating the speed of ice falling.

[0094] A wind turbine blade deicing system, comprising:

[0095] Heating the wind turbine blades to obtain an actual average heating rate;

[0096] Determining whether the absolute value of the difference between the actual average heating rate and the standard average heating rate is within a first preset range;

[0097] If the absolute value of the difference between the actual average heating rate and the standard average heating rate is not within the first preset range, it is confirmed that the wind turbine blade is frozen, and a heating program is started to heat the wind turbine blade;

[0098] Obtain the ice thickness on the wind turbine blades;

[0099] Determining a temperature parameter of the wind turbine blade according to the ice thickness, and judging whether the ice on the wind turbine blade has melted according to the temperature parameter;

[0100] If the ice has not melted, increase the de-icing heating power.

[0101] A wind turbine blade deicing system, comprising:

[0102] A first acquisition module is used to heat the wind turbine blades to obtain an actual average heating rate;

[0103] A heating module, configured to confirm that the wind turbine blades are frozen and start a heating program to heat the wind turbine blades if the actual average heating rate is less than the standard average heating rate;

[0104] The second acquisition module is used to obtain the ice thickness on the wind turbine blades;

[0105] A judgment module, used to determine a temperature parameter of the wind turbine blade according to the ice thickness, and judge whether the ice on the wind turbine blade has melted according to the temperature parameter;

[0106] The execution module is used to increase the de-icing heating power if the ice has not melted.

[0107] The embodiment of the present application also discloses a terminal device, including a memory and a processor. The memory stores a computer program that can be run on the processor. When the processor loads and executes the computer program, a wind turbine blade deicing method is adopted.

[0108] The terminal device may be a computer device such as a desktop computer, a laptop computer or a cloud server, and the terminal device includes but is not limited to a processor and a memory. For example, the terminal device may also include input and output devices, a network access device and a bus.

[0109] Among them, the processor can adopt a central processing unit (CPU). Of course, according to actual usage, other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. can also be adopted. The general-purpose processor can adopt a microprocessor or any conventional processor, etc., and this application does not impose any restrictions on this.

[0110] Among them, the memory can be an internal storage unit of the terminal device, such as a hard disk or memory of the terminal device, or it can be an external storage device of the terminal device, such as a plug-in hard disk, a smart memory card (SMC), a secure digital card (SD) or a flash memory card (FC) equipped on the terminal device, etc., and the memory can also be a combination of an internal storage unit and an external storage device of the terminal device. The memory is used to store computer programs and other programs and data required by the terminal device. The memory can also be used to temporarily store data that has been output or is to be output, and this application does not impose any restrictions on this.

[0111] Among them, through this terminal device, a wind turbine blade deicing method in the above embodiment is stored in the memory of the terminal device, and is loaded and executed on the processor of the terminal device for easy use.

[0112] An embodiment of the present application further discloses a computer-readable storage medium, and the computer-readable storage medium stores a computer program, wherein when the computer program is executed by a processor, a wind turbine blade deicing method in the above embodiment is adopted.

[0113] Among them, the computer program can be stored in a computer-readable medium, the computer program includes computer program code, the computer program code can be in the form of source code, object code, executable file or certain middleware, etc. The computer-readable medium includes any entity or device that can carry the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the computer-readable medium includes but is not limited to the above-mentioned components.

[0114] Among them, through this computer-readable storage medium, a wind turbine blade deicing method in the above embodiment is stored in a computer-readable storage medium, and is loaded and executed on a processor to facilitate the storage and application of the above method.

[0115] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0116] One or more embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A method for deicing wind turbine blades, characterized in that: include: Heating the wind turbine blades to obtain an actual average heating rate of the wind turbine blades; If the actual average heating rate is less than the standard average heating rate, it is confirmed that the wind turbine blades are frozen, and a heating program is started to heat the wind turbine blades; Obtain the ice thickness on the wind turbine blades; Determining a temperature parameter of the wind turbine blade according to the ice thickness, and judging whether the ice on the wind turbine blade has melted according to the temperature parameter; If the ice has not melted, increase the de-icing heating power.

2. The wind turbine blade deicing method according to claim 1, characterized in that: The ice coating thickness includes a first range, a second range and a third range, and the ice coating thicknesses in the first range, the second range and the third range increase in sequence.

3. The wind turbine blade deicing method according to claim 2, characterized in that: Determining the temperature parameter of the wind turbine blade according to the ice thickness, and judging whether the ice on the wind turbine blade has melted according to the temperature parameter includes: When the ice thickness is within the first range, obtaining a first temperature fluctuation after the temperature of the ice-covered area on the wind turbine blade rises to 0 degrees and a second temperature fluctuation after the temperature of the non-ice-covered area on the wind turbine blade rises to 0 degrees, wherein the first temperature fluctuation and the second temperature fluctuation are the temperature parameters; Determining whether the first temperature fluctuation is less than a preset first fluctuation value and whether the second temperature fluctuation is greater than a preset second fluctuation value; If the first temperature fluctuation is smaller than a first fluctuation value and the second temperature fluctuation is larger than a second fluctuation value, it is determined that the ice covering the wind turbine blade has melted.

4. The wind turbine blade deicing method according to claim 2, characterized in that: Determining the temperature parameter of the wind turbine blade according to the ice thickness, and judging whether the ice on the wind turbine blade has melted according to the temperature parameter includes: When the ice thickness is within the second range, obtaining the temperature fluctuation at the end of the last minute of heating within the preset heating time period, and using the temperature fluctuation at the end as the temperature parameter; Determining whether the absolute value of the end temperature fluctuation is less than a preset end fluctuation value; If the absolute value of the end temperature fluctuation is less than the end fluctuation value, it is determined that the ice covering the wind turbine blades has melted; If the absolute value of the terminal temperature fluctuation is greater than or equal to the terminal fluctuation value, it is determined that the ice covering the wind turbine blades has not melted.

5. The wind turbine blade deicing method according to claim 2, characterized in that: Determining the temperature parameter of the wind turbine blade according to the ice thickness, and judging whether the ice on the wind turbine blade has melted according to the temperature parameter includes: When the ice thickness is within the third range, a third average heating rate when the temperature of the wind turbine blade rises to zero degrees, a temperature fluctuation per minute in a preset heating time period after the temperature rises to 0 degrees, and a fourth average heating rate in the preset heating time period are obtained, and the third average heating rate, the fourth average heating rate and the temperature fluctuation are used as temperature parameters; Determining whether the temperature fluctuation is greater than a preset third fluctuation value or whether the fourth average heating rate is greater than the third average heating rate; If the temperature fluctuation is greater than the third fluctuation value or the fourth average temperature rise rate is greater than the third average temperature rise rate, it is determined that the ice on the wind turbine blade has melted.

6. The wind turbine blade deicing method according to claim 2, characterized in that: The first range is that the ice coating thickness is less than 2 mm, the second range is that the ice coating thickness is between 2 mm and 7 mm, and the third range is that the ice coating thickness is greater than 7 mm.

7. The wind turbine blade deicing method according to claim 2, characterized in that: If the ice has not melted, increasing the de-icing heating power includes: When the ice coating thickness is within a second range, turning on the second heating film and the first heating film; When the ice thickness is within the first range or the third range, turning on the first heating film and increasing the deicing heating power; The first heating film is close to the leading edge of the wind turbine blade, and the second heating film is located on a side of the wind turbine blade close to the trailing edge of the wind turbine blade and close to the tip of the wind turbine blade.

8. A wind turbine blade deicing system, characterized in that: include: A first acquisition module is used to heat the wind turbine blades to obtain an actual average heating rate; A heating module, configured to confirm that the wind turbine blades are frozen and start a heating program to heat the wind turbine blades if the actual average heating rate is less than the standard average heating rate; The second acquisition module is used to obtain the ice thickness on the wind turbine blades; A judgment module, used to determine a temperature parameter of the wind turbine blade according to the ice thickness, and judge whether the ice on the wind turbine blade has melted according to the temperature parameter; The execution module is used to increase the de-icing heating power if the ice has not melted.

9. A terminal device, comprising a memory and a processor, characterized in that: The memory stores a computer program that can be run on the processor, and when the processor loads and executes the computer program, the method according to any one of claims 1 to 7 is adopted.

10. A computer-readable storage medium having a computer program stored therein, characterized in that: When the computer program is loaded and executed by a processor, the method according to any one of claims 1 to 7 is adopted.

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