A method, device and computer-readable storage medium for de-icing a wind turbine blade

Abstract

The present invention discloses a method, device and computer-readable storage medium for de-icing a wind turbine blade, which relates to the field of wind turbine blade de-icing. An electrically adjustable air valve is provided on the housing of the wind turbine blade, and the electrically adjustable air valve is connected to a controller. As de-icing progresses, the air inside the wind turbine blade only exits through the drain holes and does not enter, resulting in a reduction in the air inside the wind turbine blade. When the controller detects that the power of the heater of the wind turbine blade de-icing device drops below a preset power, the controller controls the electrically adjustable air valve to admit air into the inner cavity of the wind turbine blade, increasing the air inside the wind turbine blade and raising the air density inside the wind turbine blade, causing the power of the heater of the wind turbine blade de-icing device to rise to the preset power, making the heat of the air heated by the heater of the wind turbine blade de-icing device higher and improving the de-icing efficiency of the wind turbine blade device.

Description

Technical Field

[0001] The present invention relates to the field of de - icing of wind turbine blades, and particularly to a method, device and computer - readable storage medium for de - icing wind turbine blades. Background Art

[0002] Wind energy is one of the important green energies. Its safe, clean and inexhaustible power generation form contains huge energy and business opportunities. Wind energy resources are particularly rich in plateaus, cold regions, ridges and mountaintops, with great development value. However, in these places, the altitude is high, the humidity is high, and the temperature is low, which easily causes icing of the wind turbine blades for wind energy development. The aerodynamic performance of the wind turbine blades is affected by icing. On the one hand, it will cause the overload of the wind turbine blades and uneven load distribution of the wind turbine blades, thus greatly affecting the continuously generated wind energy. On the other hand, when the wind turbine blades are rotating, it is extremely easy to have operating accidents caused by the falling off of ice blocks. Therefore, it is very important to de - ice the wind turbine blades.

[0003] In the prior art, a blade inlet cover plate is provided on the housing of the wind turbine blade, and drainage holes are also provided at the blade tips. The wind turbine blade de - icing device is installed inside the housing of the wind turbine blade. After the wind turbine blade de - icing device is installed, the blade inlet cover plate is generally covered, so that a relatively closed space is formed inside the wind turbine blade. As the de - icing progresses, the heater in the wind turbine blade de - icing device blows hot air through the ventilation pipe to the drainage holes. The air inside the wind turbine blade will continuously be discharged through the drainage holes. Since the blade inlet cover plate is sealed after being covered, the air inside the wind turbine blade only goes out through the drainage holes and does not come in, eventually resulting in a reduction in the air inside the wind turbine blade and a decrease in the air density inside the wind turbine blade. Also, since the power of the heater is positively linearly correlated with the air density inside the wind turbine blade, the decrease in the air density inside the wind turbine blade will also cause the power of the heater to decrease, thereby making the energy of the blown hot air lower and ultimately resulting in a deterioration of the de - icing effect. Summary of the Invention

[0004] The purpose of the present invention is to provide a method, device and computer - readable storage medium for de - icing wind turbine blades, which improve the de - icing efficiency of the wind turbine blade device.

[0005] To solve the above - mentioned technical problems, the present invention provides a method for de - icing wind turbine blades, which is applied to a controller in a wind turbine blade de - icing device. The wind turbine blade de - icing device further includes: a housing, a centrifugal fan, a heater, a ventilation pipe and an electrically - adjustable air valve provided on the housing; the controller is respectively connected to the electrically - adjustable air valve, the centrifugal fan and the heater, and the centrifugal fan, the heater and the ventilation pipe are connected in sequence; the method includes:

[0006] When the heater is working, obtaining the power of the heater;

[0007] Compare the power of the heater with a preset power.

[0008] If the power of the heater is lower than the preset power, control the electric regulating air valve to open so as to allow air to enter the inner cavity of the wind turbine blade and return to the step of obtaining the power of the heater until the power of the heater is equal to the preset power.

[0009] If the power of the heater is equal to the preset power, control the electric regulating air valve to close.

[0010] Preferably, the deicing device for the wind turbine blade further includes a ventilation pipe with a gradually changing diameter, which is connected to the ventilation pipe, and the outer diameter of the ventilation pipe with a gradually changing diameter gradually increases from the end connected to the ventilation pipe to the other end.

[0011] Preferably, before obtaining the power of the heater, it further includes:

[0012] Determine the air volume of the centrifugal fan.

[0013] Obtain the inlet temperature of the heater.

[0014] Obtain the outlet temperature of the heater.

[0015] Judge whether the air volume is within a preset air volume range, whether the inlet temperature is within a preset inlet temperature range, and whether the outlet temperature is within a preset outlet temperature range.

[0016] If the air volume is within the preset air volume range, the inlet temperature is within the preset inlet temperature range, and the outlet temperature is within the preset outlet temperature range, then enter the step of obtaining the power of the heater.

[0017] Preferably, determining the air volume of the centrifugal fan includes:

[0018] Obtain the rotational speed of the centrifugal fan.

[0019] Judging whether the air volume is within a preset air volume range includes:

[0020] Judge whether the rotational speed is within a preset rotational speed range.

[0021] If so, determine that the air volume is within the preset air volume range.

[0022] If not, determine that the air volume is not within the preset air volume range.

[0023] Preferably, obtaining the inlet temperature of the heater includes;

[0024] Obtain the inlet temperature of the heater through a first temperature sensor disposed at the air inlet of the heater;

[0025] Obtain the outlet temperature of the heater, including:

[0026] Obtain the outlet temperature of the heater through a second temperature sensor disposed at the air outlet of the heater.

[0027] Preferably, if the power of the heater is lower than the preset power, it further includes:

[0028] Control the alarm module to issue an alarm.

[0029] Preferably, controlling the electric regulating air valve to open includes:

[0030] Perform PI regulation on the difference between the preset power and the power of the heater to obtain the opening angle of the electric regulating air valve;

[0031] Control the electric regulating air valve to open at the opening angle.

[0032] Preferably, controlling the electric regulating air valve to open includes:

[0033] Obtain the preset opening angle of the electric regulating air valve;

[0034] Control the electric regulating air valve to open at the preset opening angle.

[0035] To solve the above technical problems, the present invention also provides a de-icing device for a wind turbine blade, including: a controller, a housing, a centrifugal fan, a heater, a ventilation pipe, and an electric regulating air valve disposed on the housing; the controller is respectively connected to the electric regulating air valve, the centrifugal fan, and the heater, and the centrifugal fan, the heater, and the ventilation pipe are connected in sequence;

[0036] The controller is configured to implement the steps of the above-mentioned de-icing method for a wind turbine blade.

[0037] To solve the above technical problems, the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the above-mentioned de-icing method for a wind turbine blade.

[0038] The object of the present invention is to provide a method and device for de-icing a wind turbine blade and a computer-readable storage medium. An electrically adjustable air valve is provided on the housing of the wind turbine blade and connected to a controller. As de-icing progresses, the air inside the wind turbine blade only exits through the drain holes and does not enter, reducing the air inside the wind turbine blade. When the controller detects that the power of the heater of the wind turbine blade de-icing device drops below a preset power, the controller controls the electrically adjustable air valve to admit air into the inner cavity of the wind turbine blade. The air inside the wind turbine blade increases, the air density inside the wind turbine blade rises, causing the power of the heater of the wind turbine blade de-icing device to increase to the preset power, and making the heat of the air heated by the heater of the wind turbine blade de-icing device higher, thus improving the de-icing efficiency of the wind turbine blade device. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the prior art and the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0040] Figure 1 It is a process flow chart of a method for de-icing a wind turbine blade provided by the present invention;

[0041] Figure 2 It is a process flow chart of another method for de-icing a wind turbine blade provided by the present invention;

[0042] Figure 3 It is a process flow chart of another method for de-icing a wind turbine blade provided by the present invention;

[0043] Figure 4 It is a structural schematic diagram of a device for de-icing a wind turbine blade provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] The core of the present invention is to provide a method and device for de-icing a wind turbine blade and a computer-readable storage medium, which improve the de-icing efficiency of the wind turbine blade device.

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0046] Please refer to Figure 1, Figure 1 This is a process flow chart of a de-icing method for a wind turbine blade provided by the present invention. This method is applied to the controller 5 in the wind turbine blade de-icing device. The wind turbine blade de-icing device further includes: a housing, a centrifugal fan 1, a heater 2, a ventilation pipe 3, and an electric regulating air valve 4 provided on the housing; the controller 5 is respectively connected to the electric regulating air valve 4, the centrifugal fan 1, and the heater 2, and the centrifugal fan 1, the heater 2, and the ventilation pipe 3 are connected in sequence; this method includes:

[0047] S10: When the heater 2 is working, obtain the power of the heater 2;

[0048] S11: Compare the power of the heater 2 with the preset power;

[0049] S12: If the power of the heater 2 is lower than the preset power, control the electric regulating air valve 4 to open, so as to let air enter the inner cavity of the wind turbine blade and return to the step of obtaining the power of the heater 2 until the power of the heater 2 is equal to the preset power;

[0050] S13: If the power of the heater 2 is equal to the preset power, control the electric regulating air valve 4 to close.

[0051] In the present invention, in order to solve the problem that the power of the heater 2 decreases during operation, first, the controller 5 will obtain the power of the heater 2 during operation, and in order to determine whether the power of the heater 2 decreases at this time, the power of the heater 2 at this time is compared with the preset power, and it is judged whether the power of the heater 2 decreases at this time through the comparison result. If the power of the heater 2 is lower than the preset power, that is, the power of the heater 2 decreases at this time, then the controller 5 will control the electric regulating air valve 4 provided on the housing of the wind turbine blade de-icing device to open, so as to let air enter the inner cavity of the wind turbine blade, and after the air enters, the density of the air in the inner cavity of the wind turbine blade increases. Because the power calculation formula of the heater 2 is: P = V * ρ * C * (To - Ti) * 1000 / 3600, where: P: power of the heater 2 W, V: air volume of the centrifugal fan 1 m 3 / h, ρ: air density 1.293 kg / m 3, C: Specific heat capacity of air is 1.003 kJ / (kg*K), To: Outlet temperature of heater 2 in °C, Ti: Inlet temperature of heater 2 in °C. Thus, when the power of heater 2 decreases, air enters the inner cavity of the wind turbine blade and the density of the air in the inner cavity of the wind turbine blade increases, thereby increasing the power of heater 2. However, the power of heater 2 has an upper limit. Therefore, after the electric control air valve 4 is opened and air enters the inner cavity of the wind turbine blade, it is necessary to re-judge the increased power of heater 2 until the power of heater 2 is equal to the preset power. When the power of heater 2 is equal to the preset power, the electric control air valve 4 is controlled to close, thus forming a closed-loop control. Moreover, when the power of heater 2 is equal to the preset power, automatically closing the electric control air valve 4 can prevent external cold air from continuing to enter the blade inner cavity, ensuring the reliability of the de-icing process.

[0052] It should be noted that the way for the controller 5 to obtain the power of heater 2 is to obtain the current flowing through heater 2 and the voltage across heater 2, and calculate the power of heater 2 through the voltage and current.

[0053] It also should be noted that the method for comparing the power of heater 2 with the preset power can be to obtain the power error amount by taking the difference between the preset power and the power of heater 2, and then compare the power error amount with the preset power error amount. If the power error amount is less than the preset power error amount, it is determined that the power of heater 2 is equal to the preset power; if the power error amount is not less than the preset power error amount, it is determined that the power of heater 2 is lower than the preset power or other methods.

[0054] In practical applications, heater 2 and the ventilation pipe 3 can be insulated with aerogel insulation materials, which can greatly reduce the heat loss of the hot air during the transmission process of heater 2 and the ventilation pipe 3.

[0055] The present invention provides a method for de-icing a wind turbine blade. An electric control air valve 4 is provided on the housing of the wind turbine blade, and the electric control air valve 4 is connected to the controller 5. As the de-icing progresses, the air inside the wind turbine blade only goes out but not in through the drain holes, and the air inside the wind turbine blade decreases. When the controller 5 detects that the power of the heater 2 of the wind turbine blade de-icing device drops below the preset power, the controller 5 controls the electric control air valve 4 to supply air into the inner cavity of the wind turbine blade. The air inside the wind turbine blade increases, and the density of the air inside the wind turbine blade rises, causing the power of the heater 2 of the wind turbine blade de-icing device to increase to the preset power, making the heat of the air heated by the heater 2 of the wind turbine blade de-icing device higher and improving the de-icing efficiency of the wind turbine blade device.

[0056] Based on the above embodiments:

[0057] As a preferred embodiment, the ice removal device for wind turbine blades further includes: a ventilation pipe 3 with a gradually changing diameter, which is connected to the ventilation pipe 3, and the outer diameter of the ventilation pipe 3 with a gradually changing diameter gradually increases from the end connected to the ventilation pipe 3 to the other end.

[0058] In the present invention, a ventilation pipe 3 with a gradually changing diameter is added to the ice removal device for wind turbine blades. The outer diameter of the ventilation pipe 3 with a gradually changing diameter gradually increases from the end connected to the ventilation pipe 3 to the other end. Through this structure, the heated air by the heater 2 is sequentially transmitted to the drain holes through the ventilation pipe 3 and the ventilation pipe 3 with a gradually changing diameter, and the air duct will not suddenly become larger. This solves the problem of huge loss of wind pressure in the prior art that the heated air by the heater 2 is directly transmitted to the drain holes through the ventilation pipe 3, that is, the sudden enlargement of the air duct at this time will cause a great loss of wind pressure, making the hot air unable to be better transmitted to the drain holes. The ice removal efficiency is improved.

[0059] Please refer to Figure 2 , Figure 2 which is a process flow chart of another ice removal method for wind turbine blades provided by the present invention.

[0060] As a preferred embodiment, before obtaining the power of the heater 2, it further includes:

[0061] S20: Determine the air volume of the centrifugal fan 1;

[0062] S21: Obtain the inlet temperature of the heater 2;

[0063] S22: Obtain the outlet temperature of the heater 2;

[0064] S23: Judge whether the air volume is within the preset air volume range, whether the inlet temperature is within the preset inlet temperature range, and whether the outlet temperature is within the preset outlet temperature range;

[0065] If the air volume is within the preset air volume range, the inlet temperature is within the preset inlet temperature range, and the outlet temperature is within the preset outlet temperature range, then enter the step of obtaining the power of the heater 2.

[0066] In the present invention, since the power calculation formula of the heater 2 is: P = V * ρ * C * (To - Ti) * 1000 / 3600, where: P: the power of the heater 2 W, V: the air volume of the centrifugal fan 1 m 3 / h, ρ: the air density 1.293 kg / m 3, C: Specific heat capacity of air is 1.003 kJ / (kg*K), To: Outlet temperature of heater 2 in °C, Ti: Inlet temperature of heater 2 in °C. It can be seen from the power calculation formula of heater 2 that the power of heater 2 is positively correlated with the air volume of centrifugal fan 1, air density, inlet temperature of heater 2, and outlet temperature of heater 2. Because when the power of heater 2 decreases, mainly by opening the electric regulating air valve 4 to let air into the inner cavity of the wind turbine blade and increasing the air density in the inner cavity of the wind turbine blade, the power of heater 2 can be increased. Therefore, before obtaining the power of heater 2, it is necessary to first obtain the air volume of centrifugal fan 1, the inlet temperature of heater 2, and the outlet temperature of heater 2, and respectively judge whether the air volume is within the preset air volume range, whether the inlet temperature is within the preset inlet temperature range, and whether the outlet temperature is within the preset outlet temperature range. If the conditions that the air volume is within the preset air volume range, the inlet temperature is within the preset inlet temperature range, and the outlet temperature is within the preset outlet temperature range are all met at the same time, it means that the decrease in the power of heater 2 is only related to the decrease in the air density in the inner cavity of the wind turbine blade; if one or more of these conditions are not met, it means that the decrease in the power of heater 2 is not only related to the decrease in the air density in the inner cavity of the wind turbine blade, but also related to one or more of the air volume of centrifugal fan 1, the inlet temperature of heater 2, and the outlet temperature of heater 2. However, the power of heater 2 can still be increased by opening the electric regulating air valve 4 to let air into the inner cavity of the wind turbine blade and increasing the air density in the inner cavity of the wind turbine blade. The advantage is that it verifies the specific reasons for the decrease in the power of heater 2 and improves the accuracy of the de-icing process.

[0067] In practical applications, the method for determining the air volume of centrifugal fan 1 can be to determine it by obtaining the rotational speed of centrifugal fan 1 or other determination methods; the method for obtaining the inlet temperature of heater 2 can be to obtain the inlet temperature of heater 2 through the first temperature sensor set at the air inlet of heater 2 or other obtaining methods; the method for obtaining the outlet temperature of heater 2 can be to obtain the outlet temperature of heater 2 through the second temperature sensor set at the air outlet of heater 2 or other obtaining methods.

[0068] As a preferred embodiment, determining the air volume of centrifugal fan 1 includes:

[0069] Obtaining the rotational speed of centrifugal fan 1;

[0070] Judging whether the air volume is within the preset air volume range includes:

[0071] Judging whether the rotational speed is within the preset rotational speed range;

[0072] If so, it is determined that the air volume is within the preset air volume range;

[0073] If not, it is determined that the air volume is not within the preset air volume range.

[0074] In the present invention, the method for determining the air volume of the centrifugal fan 1 is mainly achieved by obtaining the rotational speed of the centrifugal fan 1, because there is a certain corresponding relationship between the rotational speed of the centrifugal fan 1 and the air volume of the centrifugal fan 1. When the rotational speed of the centrifugal fan 1 is determined, the air volume of the centrifugal fan 1 is also determined accordingly. Correspondingly, the method for determining whether the air volume is within the preset air volume range is mainly by judging whether the rotational speed is within the preset rotational speed range. If the rotational speed is within the preset rotational speed range, it is determined that the air volume is within the preset air volume range; if the rotational speed is not within the preset rotational speed range, it is determined that the air volume is not within the preset air volume range. The air volume of the centrifugal fan 1 is accurately determined, improving the controllability of the deicing process.

[0075] As a preferred embodiment, obtaining the inlet temperature of the heater 2 includes:

[0076] Obtaining the inlet temperature of the heater 2 through a first temperature sensor disposed at the air inlet of the heater 2;

[0077] Obtaining the outlet temperature of the heater 2 includes:

[0078] Obtaining the outlet temperature of the heater 2 through a second temperature sensor disposed at the air outlet of the heater 2.

[0079] In the present invention, the method for obtaining the inlet temperature of the heater 2 is to obtain the inlet temperature of the heater 2 through a first temperature sensor disposed at the air inlet of the heater 2; the method for obtaining the outlet temperature of the heater 2 is to obtain the outlet temperature of the heater 2 through a second temperature sensor disposed at the air outlet of the heater 2. Using temperature sensors to measure the inlet temperature and outlet temperature of the heater 2 has a lower cost, and the measurement is accurate and timely.

[0080] As a preferred embodiment, if the power of the heater 2 is lower than the preset power, it further includes:

[0081] Controlling the alarm module to issue an alarm.

[0082] In the present invention, if the power of the heater 2 is lower than the preset power, that is, the power of the heater 2 drops. At this time, the controller 5 controls the alarm module to issue an alarm, which can facilitate the user to know the status of the heater 2 in a timely manner, improving the reliability of the deicing process.

[0083] It should be noted that in practical applications, the alarm module can be a display alarm device, a sound alarm device, or both a display alarm device and a sound alarm device or other alarm modules. The main function of the sound alarm module is to issue a sound alarm, such as a buzzer making a sound; the main function of the display alarm module is to issue a display alarm, such as an indicator light lighting up.

[0084] Please refer to Figure 3 ,Figure 3 The process flow chart of another ice removal method for a wind turbine blade provided by the present invention.

[0085] As a preferred embodiment, controlling the opening of the electric regulating air valve 4 includes:

[0086] Performing PI (Proportional Integral) regulation on the difference between the preset power and the power of the heater 2 to obtain the opening angle of the electric regulating air valve 4;

[0087] Controlling the electric regulating air valve 4 to open at the opening angle.

[0088] In the present invention, the opening angle of the electric regulating air valve 4 adopted is mainly to perform PI regulation on the difference between the power of the heater 2 and the preset power, and take the value obtained through PI regulation as the opening angle of the electric regulating air valve 4. The advantage is that it can timely select a suitable opening angle of the electric regulating air valve 4 according to the change of the current power of the heater 2, improving the efficiency of the ice removal process.

[0089] It should be noted that when the method for comparing the power of the heater 2 with the preset power is to obtain the power error amount by taking the difference between the preset power and the power of the heater 2, and then compare the power error amount with the preset power error amount. If the power error amount is less than the preset power error amount, it is determined that the power of the heater 2 is equal to the preset power; if the power error amount is not less than the preset power error amount, it is determined that the power of the heater 2 is lower than the preset power. In this case, the specific process is as Figure 3 shown. Figure 3 In which, p* is the preset power, P is the power of the heater 2, ΔPset is the preset power error amount, ΔP is the power error amount, Ψ* is the opening angle of the electric regulating air valve 4 after PI regulation, uT is the voltage of the heater 2, and iT is the current flowing through the heater 2.

[0090] As a preferred embodiment, controlling the opening of the electric regulating air valve 4 includes:

[0091] Obtaining the preset opening angle of the electric regulating air valve 4;

[0092] Controlling the electric regulating air valve 4 to open at the preset opening angle.

[0093] In the present invention, the opening angle of the electric regulating air valve 4 adopted is mainly to take the preset opening angle as the opening angle of the electric regulating air valve 4. The advantage is that it improves the stability of the ice removal process.

[0094] Please refer to Figure 4 , Figure 4Schematic structural diagram of an ice removal device for a wind turbine blade provided by the present invention. The device includes: a controller 5, a housing, a centrifugal fan 1, a heater 2, a ventilation pipe 3, and an electric regulating air valve 4 provided on the housing; the controller 5 is respectively connected to the electric regulating air valve 4, the centrifugal fan 1, and the heater 2, and the centrifugal fan 1, the heater 2, and the ventilation pipe 3 are connected in sequence;

[0095] The controller 5 is used to implement the steps of the wind turbine blade ice removal method as described above.

[0096] In the present invention, the controller 5 may include one or more processing cores, such as a 4-core controller 5, an 8-core controller 5, etc. The controller 5 may be implemented in at least one hardware form of a digital signal controller 5 (Digital Signal Processor, DSP), a field programmable gate array (Field-Programmable Gate Array, FPGA), or a programmable logic array (Programmable Logic Array, PLA). The controller 5 may also include a main controller 5 and a co-controller 5. The main controller 5 is a controller 5 used to process data in the wake state, also known as a central processing unit (Central Processing Unit, CPU); the co-controller 5 is a low-power controller 5 used to process data in the standby state. In some embodiments, the controller 5 may be integrated with a graphics processing unit (Graphics Processing Unit, GPU), and the GPU is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the controller 5 may further include an artificial intelligence (Artificial Intelligence, AI) controller 5, and the AI controller 5 is used to process computational operations related to machine learning.

[0097] The wind turbine blade ice removal device provided in this embodiment corresponds to the above method, so it has the same beneficial effects as the above method. Therefore, for the embodiments of the wind turbine blade ice removal device, please refer to the description of the embodiments of the method part, and will not be elaborated here.

[0098] The present invention also provides an embodiment corresponding to a computer-readable storage medium. A computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, it implements the steps of the wind turbine blade ice removal method as described above.

[0099] The computer-readable storage medium provided in this embodiment corresponds to the above method, so it has the same beneficial effects as the above method. Therefore, for the embodiments of the computer-readable storage medium, please refer to the description of the embodiments of the method part, and will not be elaborated here.

[0100] The present invention also provides an embodiment corresponding to a de-icing system for a wind turbine blade, which is applied to a controller 5 in a de-icing device for a wind turbine blade. The de-icing device for a wind turbine blade further includes: a housing, a centrifugal fan 1, a heater 2, a ventilation pipe 3, and an electrically adjustable air valve 4 provided on the housing; the controller 5 is respectively connected to the electrically adjustable air valve 4, the centrifugal fan 1, and the heater 2, and the centrifugal fan 1, the heater 2, and the ventilation pipe 3 are connected in sequence; the system includes:

[0101] A heater 2 power acquisition unit, configured to acquire the power of the heater 2 when the heater 2 is operating;

[0102] A power comparison unit, configured to compare the power of the heater 2 with a preset power;

[0103] An electrically adjustable air valve 4 opening unit, configured to, if the power of the heater 2 is lower than the preset power, control the electrically adjustable air valve 4 to open, so as to introduce air into the inner cavity of the wind turbine blade and return to the step of acquiring the power of the heater 2 until the power of the heater 2 is equal to the preset power;

[0104] An electrically adjustable air valve 4 closing unit, configured to, if the power of the heater 2 is equal to the preset power, control the electrically adjustable air valve 4 to close.

[0105] As a preferred embodiment, it further includes:

[0106] An air volume determination unit, configured to determine the air volume of the centrifugal fan 1;

[0107] An inlet temperature acquisition unit, configured to acquire the inlet temperature of the heater 2;

[0108] An outlet temperature acquisition unit, configured to acquire the outlet temperature of the heater 2;

[0109] An air volume, inlet temperature, and outlet temperature judgment unit, configured to judge whether the air volume is within a preset air volume range, whether the inlet temperature is within a preset inlet temperature range, and whether the outlet temperature is within a preset outlet temperature range;

[0110] An entry unit, configured to, if the air volume is within the preset air volume range, the inlet temperature is within the preset inlet temperature range, and the outlet temperature is within the preset outlet temperature range, enter the step of acquiring the power of the heater 2.

[0111] As a preferred embodiment, the air volume determination unit includes:

[0112] A rotation speed acquisition unit, configured to acquire the rotation speed of the centrifugal fan 1;

[0113] The air volume judgment unit includes:

[0114] A rotation speed judgment unit, configured to judge whether the rotation speed is within a preset rotation speed range;

[0115] The first determination unit is configured to determine that the air volume is within the preset air volume range if yes;

[0116] The second determination unit is configured to determine that the air volume is not within the preset air volume range if no.

[0117] As a preferred embodiment, the inlet temperature acquisition unit includes;

[0118] The inlet temperature acquisition subunit is configured to acquire the inlet temperature of the heater 2 through the first temperature sensor disposed at the air inlet of the heater 2;

[0119] The outlet temperature acquisition unit includes:

[0120] The outlet temperature acquisition subunit is configured to acquire the outlet temperature of the heater 2 through the second temperature sensor disposed at the air outlet of the heater 2.

[0121] As a preferred embodiment, it further includes:

[0122] The alarm unit is configured to control the alarm module to issue an alarm.

[0123] As a preferred embodiment, the electric regulating air valve 4 opening unit includes:

[0124] The opening angle determination unit of the electric regulating air valve 4 is configured to perform PI regulation on the difference between the preset power and the power of the heater 2 to determine the opening angle of the electric regulating air valve 4;

[0125] The opening angle control unit of the electric regulating air valve 4 is configured to control the electric regulating air valve 4 to open at the opening angle.

[0126] As a preferred embodiment, the electric regulating air valve 4 opening unit includes:

[0127] The preset opening angle acquisition unit of the electric regulating air valve 4 is configured to acquire the preset opening angle of the electric regulating air valve 4;

[0128] The preset opening angle control unit of the electric regulating air valve 4 is configured to control the electric regulating air valve 4 to open at the preset opening angle.

[0129] The wind turbine blade de-icing system provided in this embodiment corresponds to the above method, so it has the same beneficial effects as the above method. Therefore, for the embodiments of the wind turbine blade de-icing system, please refer to the description of the embodiments in the method part, and will not be elaborated here for the time being.

[0130] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0131] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for deicing a wind turbine blade, characterized in that, A controller applied to a de-icing device for a wind turbine blade. The de-icing device for the wind turbine blade further includes: a housing, a centrifugal fan, a heater, a ventilation pipe, and an electric regulating air valve provided on the housing; the controller is respectively connected to the electric regulating air valve, the centrifugal fan, and the heater, and the centrifugal fan, the heater, and the ventilation pipe are connected in sequence; the method includes: When the heater is working, obtain the power of the heater; Compare the power of the heater with a preset power; If the power of the heater is lower than the preset power, control the electric regulating air valve to open so as to let air enter the inner cavity of the wind turbine blade and return to the step of obtaining the power of the heater until the power of the heater is equal to the preset power; If the power of the heater is equal to the preset power, control the electric regulating air valve to close; wherein: The de-icing device for the wind turbine blade further includes: a ventilation pipe with a gradually changing diameter, the ventilation pipe with a gradually changing diameter is connected to the ventilation pipe, and the outer diameter of the ventilation pipe with a gradually changing diameter gradually increases from the end connected to the ventilation pipe to the other end; Before obtaining the power of the heater, it further includes: determining the air volume of the centrifugal fan; obtaining the inlet temperature of the heater; obtaining the outlet temperature of the heater; judging whether the air volume is within a preset air volume range, whether the inlet temperature is within a preset inlet temperature range, and whether the outlet temperature is within a preset outlet temperature range; if the air volume is within the preset air volume range, the inlet temperature is within the preset inlet temperature range, and the outlet temperature is within the preset outlet temperature range, then enter the step of obtaining the power of the heater; Determining the air volume of the centrifugal fan includes: obtaining the rotation speed of the centrifugal fan; Judging whether the air volume is within a preset air volume range includes: judging whether the rotation speed is within a preset rotation speed range; if so, it is determined that the air volume is within the preset air volume range; if not, it is determined that the air volume is not within the preset air volume range; Controlling the electric regulating air valve to open includes: Performing PI regulation on the difference between the preset power and the power of the heater to obtain the opening angle of the electric regulating air valve; controlling the electric regulating air valve to open at the opening angle.

2. The de-icing method for a wind turbine blade according to claim 1, characterized in that, Obtaining the inlet temperature of the heater includes: Obtaining the inlet temperature of the heater through a first temperature sensor provided at the air inlet of the heater; Obtaining the outlet temperature of the heater includes: Obtaining the outlet temperature of the heater through a second temperature sensor provided at the air outlet of the heater.

3. The ice removal method for a wind turbine blade according to claim 1, characterized in that, If the power of the heater is lower than the preset power, it further includes: Controlling an alarm module to issue an alarm.

4. A de-icing device for a wind turbine blade, characterized in that, Includes: A controller, a housing, a centrifugal fan, a heater, a ventilation pipe, and an electric regulating air valve provided on the housing; The controller is respectively connected to the electric regulating air valve, the centrifugal fan, and the heater, and the centrifugal fan, the heater, and the ventilation pipe are connected in sequence; The controller is used to implement the steps of the de-icing method for the wind turbine blade according to any one of claims 1 to 3.

5. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the wind turbine blade de-icing method according to any one of claims 1 to 3 are implemented.

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