Wind power generation device, wind turbine blade ice melting system and control method

Abstract

The application discloses a wind power generation device, a fan blade ice melting system and a control method. The blade heating module of the ice melting system comprises a heating element arranged on each fan blade. The blade temperature monitoring module is used for monitoring the current real-time temperature of the PS surface part and the blade leading edge part of the fan blade in real time. The ambient temperature monitoring module is used for monitoring the current ambient temperature of the fan blade in real time. The heating control module is electrically connected with the blade temperature monitoring module, the heating element and the ambient temperature monitoring module. The heating control module is used for adjusting the heating temperature of the heating element according to the current real-time temperature signal fed back by the blade temperature monitoring module. The heating control module is used for controlling the start and stop of the heating element according to the current ambient temperature signal fed back by the ambient temperature monitoring module. The application sets the heating element on the PS surface part and the blade leading edge part of the fan blade, focuses on solving the icing problem of the blade leading edge and the PS surface, and the aerodynamic efficiency of the laying area should be more than 70%.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of wind power generation, and particularly relates to a wind power generation device, a wind turbine blade ice melting system and a control method. BACKGROUND

[0002] With the accelerated construction of new power systems, the proportion of new energy such as wind power is increasing, but wind turbines are prone to icing in winter, which leads to large-area disconnection, seriously affecting the safe operation of the power grid and the reliability of social power supply. Therefore, it is urgent to carry out research on wind turbine deicing technology and equipment to improve winter wind power output and ensure reliable power supply for the whole society.

[0003] Wind turbine deicing is currently a worldwide problem. Since the blade is a high-speed rotating component with a length of nearly 100 meters, the icing mechanism and heat dissipation characteristics of the blade under different meteorological environments and unit operating conditions are not clear. Therefore, there is currently no blade icing monitoring means. During the icing development and ice melting process of the wind turbine, the icing condition of the blade cannot be accurately grasped, and only the deviation of the wind turbine power generation power or artificial visual observation can be used to judge the icing, which seriously affects the operation control of the wind turbine start-stop machine and the deicing system. SUMMARY

[0004] The purpose of the present application is to provide a wind power generation device, a wind turbine blade ice melting system and a control method to solve the technical problem that wind turbine blades are prone to icing in winter.

[0005] In order to achieve the above-mentioned purpose, one aspect of the present application provides a wind turbine blade ice melting system, comprising:

[0006] A blade heating module comprising a heating element arranged on each of the wind turbine blades, the number of the heating elements being two and arranged on the PS surface part and the blade leading edge part of the wind turbine blades, respectively;

[0007] A blade temperature monitoring module for monitoring the current real-time temperature of the PS surface part and the blade leading edge part of the wind turbine blades in real time;

[0008] An environmental temperature monitoring module for monitoring the current environmental temperature where the wind turbine blades are located in real time;

[0009] A heating control module electrically connected with the blade temperature monitoring module, the heating element and the environmental temperature monitoring module, the heating control module being configured to adjust the heating temperature of the heating element according to the current real-time temperature signal fed back by the blade temperature monitoring module, and the heating control module being configured to control the start-stop of the heating element according to the current environmental temperature signal fed back by the environmental temperature monitoring module.

[0010] In some embodiments, the PS surface part and the blade leading edge part are each provided with a first plane, and each of the heating elements comprises:

[0011] a heating element body, which is a carbon fiber heating film;

[0012] a power supply electrode, which includes a positive electrode and a negative electrode, the positive electrode being located on the first plane, and the carbon fiber heating film being located between the positive electrode and the negative electrode.

[0013] In some embodiments, the blade temperature monitoring module includes:

[0014] a wireless sensor unit, which includes a first temperature sensor arranged on a PS surface portion of each blade and a second temperature sensor arranged on a leading edge portion of the blade, the first temperature sensor being configured to detect a first temperature of the PS surface portion, and the second temperature sensor being configured to detect a second temperature of the leading edge portion of the blade;

[0015] a signal receiving unit arranged inside a nacelle, the signal receiving unit being configured to receive the first temperature signal and the second temperature signal transmitted by the wireless sensor unit and transmit the first temperature signal and the second temperature signal to the heating control module.

[0016] In some embodiments, the blade temperature monitoring module further includes a solar energy storage module configured to supply power to the wireless sensor unit, the solar energy storage module being arranged on a side of the fan blade facing the sun.

[0017] In some embodiments, the heating control module includes, which is arranged on a tower foundation:

[0018] a main control cabinet, which is configured to receive the temperature signal transmitted by the signal receiving unit, perform arithmetic processing on the temperature signal, and output a control signal;

[0019] a power supply cabinet, which is connected to the heating element through a cable and configured to output power from the power supply cabinet to the heating element of each fan blade;

[0020] a blade control cabinet, which is electrically connected to the main control cabinet and the power supply cabinet, and configured to receive the control signal output by the main control cabinet after arithmetic processing, and control the power supply cabinet to work according to the control signal.

[0021] In some embodiments, the fan blade deicing system further includes a lightning protection module, the lightning protection module including:

[0022] a flow guide strip, which is arranged on an outer surface of the fan blade, the flow guide strip being made of an insulating material and having a discharge channel;

[0023] a primary main power lightning protection device, which is arranged in a cavity of the fan blade and configured to protect the fan blade from lightning;

[0024] A lightning strike monitoring assembly is arranged inside the fan blade and used to monitor the lightning strike state of the fan blade.

[0025] A lightning protection power supply is arranged on the tower base and used to protect the heating control module from lightning.

[0026] In some embodiments, the outer surface of the fan blade is provided with a mounting groove, the inner circumferential wall of the mounting groove is coated with an adhesive, and the flow guide strip is embedded in the mounting groove and sealed and bonded with the inner circumferential wall of the mounting groove.

[0027] The second aspect of the present application provides a wind power generation device comprising the fan blade deicing system as described above.

[0028] The third aspect of the present application provides a fan blade deicing control method, which is applied to the fan blade deicing system as described above, and comprises the following steps:

[0029] Obtaining a first current ambient temperature and a current humidity at which the fan blade is located;

[0030] In the case that the first current ambient temperature is less than a first preset temperature and the current humidity is greater than a preset humidity, the heating element is controlled to be turned on and heated at a preset power;

[0031] During the heating of the PS surface part and the blade leading edge part of the fan blade by the heating element, a second current ambient temperature at which the fan blade is located is obtained in real time;

[0032] When the second current ambient temperature is greater than or equal to the first preset temperature, the heating element is controlled to stop heating.

[0033] In some embodiments, the fan blade deicing control method further comprises the following steps:

[0034] During the heating of the PS surface part and the blade leading edge part of the fan blade by the heating element, a first temperature of the PS surface part and a second temperature of the blade leading edge part are obtained in real time, respectively;

[0035] The heating parameters of the heating element are adjusted according to the first temperature and the second temperature.

[0036] Through the above technical solutions, the wind power generation device, the fan blade deicing system and the control method provided by the embodiments of the present application have the following beneficial effects:

[0037] The fan blade ice melting system of the present application comprises a blade heating module, a blade temperature monitoring module, an ambient temperature monitoring module and a heating control module; the blade heating module comprises a heating element arranged on each fan blade, and the present application uses two heating elements, and the heating elements are arranged on the PS surface part and the blade leading edge part of the fan blade, thereby focusing on solving the icing problem of the blade leading edge and the PS surface, and the aerodynamic efficiency of the laying area should account for more than 70%, and the overlapping part of the PS surface part and the blade leading edge part also has a part of the overlapping heating elements. In addition, the fan blade ice melting system can also monitor the surface temperature of the fan blade in real time, and the output power of the heating element is adjusted through the current real-time temperature information fed back by the blade temperature monitoring module, so that the heating temperature of the heating element can be changed to ensure the safe operation of the system. Further, the fan blade ice melting system of the present application further comprises an ambient temperature monitoring module, which monitors the ambient temperature in real time, and determines whether the heating element needs to be started according to the monitored ambient temperature, so as to improve the energy utilization rate of the whole system.

[0038] Other features and advantages of the embodiments of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0039] The accompanying drawings are included to provide a further understanding of the embodiments of the present application, and constitute a part of the specification, and are used together with the following specific embodiments to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor. In the drawings:

[0040] Figure 1 It is a structural schematic diagram of the fan blade ice melting system of the present application;

[0041] Figure 2 It is a flowchart of the fan blade ice melting control method of the present application.

[0042] BRIEF DESCRIPTION OF DRAWINGS

[0043] 100 fan blade 400 slip ring

[0044] 200 nacelle 500 heating control module

[0045] 300 tower base 600 heating element DETAILED DESCRIPTION

[0046] The specific embodiments of the present application will be described in detail below in combination with the drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0047] A wind power generation device, a wind turbine blade ice melting system and a method according to the present application are described below with reference to the accompanying drawings.

[0048] As shown in Figure 1 The present application provides a wind turbine blade ice melting system, which comprises a blade heating module, a blade temperature monitoring module, an ambient temperature monitoring module and a heating control module 500; the blade heating module comprises heating elements 600 arranged on each wind turbine blade 100, and the number of the heating elements 600 is two and they are arranged on the PS surface part and the blade leading edge part of the wind turbine blade 100 respectively; the blade temperature monitoring module is used to monitor the current real-time temperature of the PS surface part and the blade leading edge part of the wind turbine blade 100 in real time; the ambient temperature monitoring module is used to monitor the current ambient temperature where the wind turbine blade 100 is located in real time; the heating control module 500 is electrically connected with the blade temperature monitoring module, the heating elements 600 and the ambient temperature monitoring module, and the heating control module 500 is used to adjust the heating temperature of the heating elements 600 according to the current real-time temperature signal fed back by the blade temperature monitoring module, and the heating control module 500 is used to control the start and stop of the heating elements 600 according to the current ambient temperature signal fed back by the ambient temperature monitoring module.

[0049] Wherein, when the wind turbine blade 100 is divided into regions, the wind turbine blade 100 is taken as an example of an elliptical structure, the center line is drawn along the axial direction, and when the wind turbine blade 100 rotates counterclockwise, the side toward the rotating direction is the PS surface part, and the side close to the inside is the blade leading edge part when a line is drawn along the direction perpendicular to the axial center line. As is well known, the PS surface part and the blade leading edge part are the regions of the wind turbine blade 100 that are prone to icing. Therefore, the present application uses two heating elements 600, and the heating elements 600 are arranged on the PS surface part and the blade leading edge part of the wind turbine blade 100, which focuses on solving the icing problem of the blade leading edge and the PS surface, and the laying area aerodynamic efficiency ratio should be more than 70%, wherein the heating elements 600 in the overlapping part of the PS surface part and the blade leading edge part also overlap. In addition, the wind turbine blade ice melting system can also monitor the surface temperature of the wind turbine blade 100 in real time, and adjust the output power of the heating elements 600 through the current real-time temperature information fed back by the blade temperature monitoring module, so as to change the heating temperature of the heating elements 600, so as to ensure the safe operation of the system. Further, since the ambient temperature affects the ice melting state of the wind turbine blade 100, the wind turbine blade ice melting system of the present application also comprises an ambient temperature monitoring module, which monitors the ambient temperature in real time through the ambient temperature monitoring module, and determines whether the heating elements 600 need to be started according to the monitored ambient temperature, so as to improve the energy utilization rate of the whole system.

[0050] In some embodiments, the PS surface part and the blade leading edge part are each provided with a first plane, each heating element 600 includes a heating body and a power supply electrode; the heating body is a carbon fiber heating film; the power supply electrode includes a positive electrode and a negative electrode, the positive electrode is located on the first plane, and the carbon fiber heating film is located between the positive electrode and the negative electrode.

[0051] In the PS surface part and the blade leading edge part, the paint putty is polished to form a first plane. The glass fiber cloth is integrally injection molded to form a second plane, so that the carbon fiber heating film layer is completely between the first plane and the second plane, forming a heating layer with heating and heat preservation effects.

[0052] In addition, holes are made in the side wall of the inner cavity of the fan blade 100, and the power supply electrode of the heating element 600 and the power supply are arranged in the inner cavity of the fan blade 100 through the holes, and one end of the positive electrode and the negative electrode is directly connected to the carbon fiber heating film between the first plane and the second plane, and the other end is connected to the power supply cabinet of the heating control module 500 arranged in the tower foundation 300 through the slip ring 400 and the tower cable clamp. When the carbon fiber heating film is used to heat the PS surface part and the blade leading edge part prone to icing, the heating area can be heated and infrared rays can be emitted by the carbon fiber heating, so that the temperature of the surrounding objects is increased. The advantage of this radiation heating method is that compared with traditional heaters, energy waste is reduced, faster and more uniform heating is achieved, and air pollution and fluctuations that interfere with other electronic devices are avoided.

[0053] In some embodiments, the blade temperature monitoring module includes a wireless sensor unit and a signal receiving unit; the wireless sensor unit includes a first temperature sensor arranged on the PS surface part of each blade and a second temperature sensor arranged on the blade leading edge part, the first temperature sensor is used to detect the first temperature of the PS surface part, and the second temperature sensor is used to detect the second temperature of the blade leading edge part, the first temperature sensor and the second temperature sensor transmit real-time data to the heating control module 500 through 4G and LORA communication technology; the signal receiving unit is arranged inside the cabin 200, and the signal receiving unit is used to receive the first temperature signal and the second temperature signal sent by the wireless sensor unit and send them to the heating control module 500.

[0054] In this embodiment, the current temperatures of the PS surface part and the blade leading edge part are monitored in real time by the first temperature sensor and the second temperature sensor respectively, and the current temperatures of the PS surface part and the blade leading edge part are compared with the temperature borne by the fan blade 100, and then the heating control module 500 is adjusted, so that the heating control module 500 controls to change the heating parameters of the corresponding heating unit, to prevent the PS surface part and the blade leading edge part from being damaged due to too high temperature, and also to prevent the PS surface part and the blade leading edge part from not being able to melt ice due to too low temperature.

[0055] In some embodiments, the blade temperature monitoring module further comprises a solar energy storage module for powering the wireless sensor unit, the solar energy storage module is arranged on the side of the fan blade 100 facing the sun, and the solar energy storage module is exposed to light to supplement energy during operation and maintain stable operation. Among them, the solar energy storage module collects sunlight and converts it into electrical energy that can power the wireless sensor unit.

[0056] In some embodiments, the heating control module 500 comprises a main control cabinet, a power supply cabinet and a blade control cabinet arranged on the tower base 300, the main control cabinet is used to receive the temperature signal sent by the signal receiving unit and perform operation processing and output the control signal; the power supply cabinet is connected with the heating element 600 through the cable and is used to output the power of the power supply cabinet to the heating element 600 of each fan blade 100; the blade control cabinet is electrically connected with the main control cabinet and the power supply cabinet, and the blade control cabinet is used to receive the control signal sent by the main control cabinet after operation processing, and control the power supply cabinet according to the control signal.

[0057] Among them, the main control cabinet is controlled by PLC, receives the temperature and icing wireless sensor signal through the signal receiving unit, outputs the switch signal to the blade control cabinet after operation processing, and finally controls the conduction and shutdown of the main power supply. The power supply cabinet is used to control the power supply and the main power supply introduction, and is connected with the original scene auxiliary variable cabinet through the cable, and is connected with the tower base 300 control cabinet to the cabin 200. The blade control cabinet outputs the power to the heating element 600 laid on each fan blade 100 through PLC logic control, and collects the temperature signal.

[0058] Further, due to the weak lightning protection performance and low deicing efficiency of the existing fan deicing system, and the frequent lightning strikes of the wind farm, the deicing system fails frequently and cannot operate reliably during the icing period in winter. In order to solve the above problems, the fan blade deicing system of the present application further comprises a lightning protection module, the lightning protection module comprises a flow guide strip, a first main power supply lightning protection, a lightning strike monitoring assembly and a second control power supply lightning protection; the flow guide strip is arranged on the outer surface of the fan blade 100, the flow guide strip is made of insulating material and has a discharge channel; the first main power supply lightning protection is arranged in the inner cavity of the fan blade 100 and is used for lightning protection of the fan blade 100; the lightning strike monitoring assembly is arranged inside the fan blade 100 and is used for monitoring the lightning strike state of the fan blade 100, so as to realize real-time tracking of the state of the fan blade 100; the second control power supply lightning protection is arranged on the tower base 300 and is used for lightning protection of the heating control module 500.

[0059] The flow guide strip is artificially added on the surface of the insulating material to form a discharge channel for lightning flashover by using the skin effect of lightning current or high-frequency current. The lightning strike monitoring component has lightning strike frequency recording, switch state monitoring, temperature measurement, three-phase power grid voltage monitoring, and ground state monitoring, and transmits data in real time through an RS485 bus. The secondary control power supply lightning protection includes a 220V surge protector and a 24V surge protector. In addition, the primary power supply lightning protection arranged in the inner cavity of the fan blade 100 isolates the ground wire PE of the main power supply cable from the cabinet using an insulator, and also isolates the PE wire from the shielding layer at the position of the slip ring 400, so that the electric charge carried by the PE wire can be directly discharged into the ground through a single channel.

[0060] In some embodiments, the outer surface of the fan blade 100 is provided with a mounting groove, and the inner circumferential wall of the mounting groove is coated with an adhesive. The flow guide strip is embedded in the mounting groove, and the flow guide strip and the inner circumferential wall of the mounting groove are sealingly bonded.

[0061] In the process of installing the flow guide strip, the surface of the blade in the target area is polished in advance using a grinding wheel to form a mounting groove for installing the flow guide strip. In the process of installation, the adhesive is uniformly applied in the mounting groove. The flow guide strip is pressed into the mounting groove to bond the flow guide strip and the inner circumferential wall of the mounting groove. A sealant is added to the edge of the flow guide strip to smoothly transition between the fan blade 100 and the flow guide strip.

[0062] The second aspect of the present application provides a wind power generation device comprising a plurality of fan blades 100 and a fan blade deicing system as described above. Since the wind power generation device adopts all the embodiments of the above-mentioned fan blade deicing system, it has all the beneficial effects brought by the above-mentioned fan blade deicing system, which will not be described in detail here.

[0063] As shown in Figure 2 The third aspect of the present application provides a fan blade deicing control method applied to the fan blade deicing system as described above. The fan blade deicing control method comprises the following steps:

[0064] S10: obtaining a first current ambient temperature and a current humidity of the fan blade 100;

[0065] S20: in the case that the first current ambient temperature is less than a first preset temperature and the current humidity is greater than a preset humidity, controlling the heating element 600 to start heating according to a preset power;

[0066] S30: in the process of heating the PS surface part and the blade leading edge part of the fan blade 100 by the heating element 600, obtaining a second current ambient temperature of the fan blade 100 in real time;

[0067] S40: When the second current ambient temperature is greater than or equal to the first preset temperature, the heating element 600 is controlled to stop heating.

[0068] In this embodiment, the first preset temperature represents the critical ambient temperature for the start and stop of the heating element 600, that is, the start and stop of the heating element 600 is determined by the ambient temperature of the fan blade 100. For example, when the first preset temperature is 5°C, if the ambient temperature is above 5°C and the ambient humidity is greater than 80%, icing of the fan blade 100 will not occur at this ambient temperature, so the heating element 600 does not need to be turned on at this time; when the ambient temperature is below 5°C, the ambient temperature is low, and the fan blade 100 is more likely to ice, so the heating element 600 needs to be turned on to heat the fan blade 100.

[0069] In addition, during the heating of the fan blade 100 by the heating element 600, the second current ambient temperature of the fan blade 100 also needs to be obtained in real time. When the second current ambient temperature is greater than or equal to the first preset temperature, it indicates that the probability of icing of the fan blade 100 is small at this time, and from the perspective of energy saving, the heating element 600 can be controlled to stop heating.

[0070] In some embodiments, the fan blade deicing control method further comprises the steps of:

[0071] During the heating of the PS surface portion and the leading edge portion of the fan blade 100 by the heating element 600, the first temperature of the PS surface portion and the second temperature of the leading edge portion are obtained in real time, respectively.

[0072] The heating parameters of the heating element 600 are adjusted according to the first temperature and the second temperature.

[0073] In this embodiment, in order to protect the fan blade 100, the first temperature of the PS surface portion and the second temperature of the leading edge portion need to be monitored in real time during heating, so as to adjust the heating parameters of the heating element 600 according to the monitored first temperature and second temperature. During the heating process, when the temperature of the fan blade 100 is too high, the high temperature will damage the fan blade 100, so the output power of the heating element 600 can be reduced to reduce the heating temperature of the heating element 600; when the temperature of the fan blade 100 is too low, it indicates that the heating parameters of the heating element 600 do not meet the deicing requirements at this time, so the output power of the heating element 600 needs to be increased at this time to increase the heating temperature of the heating element 600 and improve the deicing efficiency.

[0074] In the description of the application, it should be understood that the terms "first", "second" are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0075] In this application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or communicate with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0076] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application. In this specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0077] Although the embodiments of the application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be construed as limiting the application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the application.

Claims

1. A wind turbine blade de-icing system, characterized in that, The fan blade deicing system comprises: a blade heating module, comprising a heating element (600) arranged on each of the fan blades (100), the number of the heating element (600) being two and arranged on the PS surface part and the blade leading edge part of the fan blade (100) respectively; a blade temperature monitoring module for monitoring the current real-time temperature of the PS surface part and the blade leading edge part of the fan blade (100) in real time; an ambient temperature monitoring module for monitoring the current ambient temperature where the fan blade (100) is located in real time; a heating control module (500) electrically connected with the blade temperature monitoring module, the heating element (600) and the ambient temperature monitoring module, the heating control module (500) being used for adjusting the heating temperature of the heating element (600) according to the current real-time temperature signal fed back by the blade temperature monitoring module, and the heating control module (500) being used for controlling the start-stop of the heating element (600) according to the current ambient temperature signal fed back by the ambient temperature monitoring module; the PS surface part and the blade leading edge part are each provided with a first plane, and each of the heating element (600) comprises: a heating element body which is a carbon fiber heating film; a power supply electrode comprising a positive electrode and a negative electrode, the positive electrode being located on the first plane, and the carbon fiber heating film being located between the positive electrode and the negative electrode; the blade temperature monitoring module comprises: a wireless sensor unit comprising a first temperature sensor arranged on the PS surface part of each blade and a second temperature sensor arranged on the blade leading edge part, the first temperature sensor being used for detecting the first temperature of the PS surface part, and the second temperature sensor being used for detecting the second temperature of the blade leading edge part; a signal receiving unit arranged inside the cabin (200), the signal receiving unit being used for receiving the first temperature signal and the second temperature signal sent by the wireless sensor unit and sending the signals to the heating control module (500); a solar energy storage module for supplying power to the wireless sensor unit, the solar energy storage module being arranged on the side of the fan blade (100) facing the sun; the fan blade deicing system further comprises a lightning protection module, the lightning protection module comprising: a flow guide strip arranged on the outer surface of the fan blade (100), the flow guide strip being made of insulating material and having a discharge channel, the outer surface of the fan blade (100) being provided with a mounting groove, the inner circumferential wall of the mounting groove being coated with an adhesive, the flow guide strip being embedded in the mounting groove, and the flow guide strip and the inner circumferential wall of the mounting groove being sealed and bonded; a primary main power lightning protection device arranged in the inner cavity of the fan blade (100) and used for lightning protection of the fan blade (100); a lightning strike monitoring assembly arranged inside the fan blade (100) and used for monitoring the lightning strike state of the fan blade (100); a secondary control power lightning protection device arranged on the tower foundation (300) and used for lightning protection of the heating control module (500).

2. The wind turbine blade de-icing system of claim 1, wherein, the heating control module (500) comprises a lightning protection device arranged on the tower foundation (300). A main control cabinet is configured to receive the temperature signal transmitted by the signal receiving unit, perform arithmetic processing, and output a control signal. A power supply cabinet is connected to the heating element (600) through a cable and is configured to output power from the power supply cabinet to the heating element (600) of each fan blade (100). A blade control cabinet is electrically connected to the main control cabinet and the power supply cabinet, and is configured to receive the arithmetic processed control signal transmitted by the main control cabinet and control the power supply cabinet to work according to the control signal.

3. A wind power plant, characterized in that The fan blade deicing system according to any one of claims 1-2.

4. A method of ice melting control for a wind turbine blade, characterized in that, The fan blade deicing control method is applied to the fan blade deicing system according to any one of claims 1-2, and comprises the steps of: obtaining a first current ambient temperature and a current humidity at which the fan blade (100) is located; controlling the heating element (600) to start heating at a preset power when the first current ambient temperature is less than a first preset temperature and the current humidity is greater than a preset humidity; obtaining a second current ambient temperature at which the fan blade (100) is located in real time during the heating of the PS surface part and the blade leading edge part of the fan blade (100) by the heating element (600); stopping the heating of the heating element (600) when the second current ambient temperature is greater than or equal to the first preset temperature.

5. The method of ice accretion control for a wind turbine blade of claim 4, wherein, The fan blade deicing control method further comprises the steps of: obtaining a first temperature of the PS surface part and a second temperature of the blade leading edge part in real time during the heating of the PS surface part and the blade leading edge part of the fan blade (100) by the heating element (600); adjusting the heating parameters of the heating element (600) according to the first temperature and the second temperature.

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