De-icing control methods, devices, wind turbines, wind power generation systems and media

Abstract

This invention provides a de-icing control method, device, wind turbine, wind power generation system, and medium, belonging to the field of wind power technology. The de-icing control method includes: determining whether to enter a de-icing mode or a preventative icing mode based on acquired environmental and icing information; in de-icing mode, stopping the wind turbine operation and controlling the total power of all heaters to perform de-icing heating at a first heating power based on the internal blade temperature and heater temperature of the wind turbine, until the heating time reaches a preset heating time, then restarting the wind turbine; in preventative icing mode, controlling the total power of all heaters to perform anti-icing heating at a second heating power based on the internal blade temperature and heater temperature. Therefore, the wind turbine can maintain efficient operation in cold environments while reducing downtime and maintenance costs caused by icing.

Description

Technical Field

[0001] This invention relates to the field of wind power technology, specifically to a de-icing control method, device, wind turbine, wind power generation system, and medium. Background Technology

[0002] Wind power systems are a crucial support for building a new type of power system based on new energy sources. In winter, icing on wind turbine blades leads to widespread grid disconnection, severely impacting the safe, stable operation of the power grid and reliable power supply. Wind turbine blades are the most fundamental and critical components of a wind turbine unit. When ice forms on the blade surface, it alters the aerodynamic characteristics of the blades, increasing the dynamic load on the wind turbine unit and thus affecting the stable operation of the wind power system. Furthermore, iced blades increase weight and drag, leading to reduced power generation efficiency, unstable output power, and potentially even mechanical failures, resulting in shutdowns. Therefore, to ensure the stable operation of wind power systems, more stringent requirements are placed on effective anti-icing and de-icing operations for wind turbine units. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of this application is to provide a de-icing control method, device, wind turbine, wind power generation system and medium.

[0004] To achieve the above objectives, the first aspect of this application provides a de-icing control method, comprising:

[0005] Based on the acquired environmental and icing information, determine whether to enter de-icing mode or anti-icing mode;

[0006] When entering de-icing mode, the wind turbine is stopped from operating, and based on the internal temperature of the wind turbine blades and the temperature of the heaters, the total power of all heaters is controlled to perform heating and de-icing at the first heating power until the heating time reaches the preset heating time, and then the wind turbine is started.

[0007] When entering the anti-icing mode, based on the internal temperature of the blades and the temperature of the heaters, the total power of all heaters is controlled to perform heating anti-icing control at a second heating power, wherein the second heating power is less than the first heating power.

[0008] In this embodiment of the application, environmental information includes temperature. Determining whether to enter de-icing mode or anti-icing mode based on the acquired environmental information and icing information includes:

[0009] When the temperature is below the preset low temperature threshold, it is determined whether icing occurs based on icing information;

[0010] If icing occurs and the icing thickness is greater than or equal to a preset thickness threshold, enter de-icing mode.

[0011] In the absence of icing, or in the presence of icing but with an ice thickness less than a preset thickness threshold, it is determined whether the actual power of the wind turbine is less than a first power threshold, wherein the first power threshold is determined based on a first threshold coefficient and the theoretical power corresponding to the wind speed.

[0012] If the actual power is less than the first power threshold, enter the de-icing mode;

[0013] If the actual power is greater than or equal to the first power threshold, enter the anti-icing mode.

[0014] In this embodiment of the application, based on the internal temperature of the wind turbine blades and the heater temperature, the total power of all heaters is controlled to perform heating and de-icing control at a first heating power, including:

[0015] If the heater temperature is less than or equal to the first heater threshold and / or the blade internal temperature of the wind turbine is less than or equal to the first blade temperature threshold, control the total power of all heaters to operate at the first heating power until the heater temperature is greater than the second heater threshold and / or the blade internal temperature is greater than the second blade temperature threshold, then control all heaters to stop operating, wherein the second heater threshold is greater than the first heater threshold and the second blade temperature threshold is greater than the first blade temperature threshold.

[0016] In this embodiment of the application, when the heater temperature is less than or equal to a first heater threshold and / or the internal temperature of the wind turbine blades is less than or equal to a first blade temperature threshold, the total power of all heaters is controlled to operate at a first heating power until the heater temperature is greater than a second heater threshold and / or the internal temperature of the blades is greater than a second blade temperature threshold, at which point all heaters are controlled to stop operating, including:

[0017] When the heater temperature is less than or equal to the first heater threshold and / or the internal temperature of the wind turbine blades is less than or equal to the first blade temperature threshold, control the total power of all heaters to operate at the first heating power.

[0018] Monitor the heater temperature and obtain the heater's heating rate within a preset time range;

[0019] If the heater temperature is greater than the first heater threshold and less than the second heater threshold, and the heating rate is greater than the first rate threshold, then the total power of all heaters is controlled to operate at the third heating power, wherein the third heating power is less than the first heating power.

[0020] If the heater temperature is greater than the first heater threshold and less than the second heater threshold, and the heating rate is less than the first rate threshold and greater than the second rate threshold, then the total power of all heaters is controlled to operate at the fourth heating power, wherein the fourth heating power is less than the third heating power.

[0021] If the heater temperature exceeds the second heater threshold and / or the blade internal temperature exceeds the second blade temperature threshold, control all heaters to stop operating.

[0022] In this embodiment, based on the internal temperature of the blades and the temperature of the heaters, the total power of all heaters is controlled to perform heating and anti-icing control at a second heating power, including:

[0023] If the heater temperature is less than or equal to the first heater threshold and / or the internal temperature of the wind turbine blade is less than or equal to the first blade temperature threshold, control the total power of all heaters to operate at the second heating power until the heater temperature is greater than the second heater threshold and / or the internal temperature of the blade is greater than the second blade temperature threshold, then control all heaters to stop operating, wherein the second heater threshold is greater than the first heater threshold and the second blade temperature threshold is greater than the first blade temperature threshold.

[0024] In this embodiment of the application, the de-icing control method further includes:

[0025] Based on a preset delay start time, the total power of all heaters is controlled to perform heating and de-icing control at a first heating power, or the total power of all heaters is controlled to perform heating and anti-icing control at a second heating power.

[0026] A second aspect of this application provides a de-icing control device, comprising:

[0027] The memory is configured to store instructions;

[0028] The processor is configured to retrieve instructions from memory and, when executing the instructions, to implement the de-icing control method as described in the above embodiments.

[0029] A third aspect of this application provides a wind turbine generator, comprising:

[0030] De-icing control device as described in the above embodiments;

[0031] blade;

[0032] Wind turbine.

[0033] The fourth aspect of this application provides a wind power generation system, comprising:

[0034] The wind turbine unit as described in the above embodiment;

[0035] Energy storage subsystem, used to store electrical energy;

[0036] Grid connection control system is used to transmit the electrical energy generated by the wind power generation system to the power grid.

[0037] A fifth aspect of this application provides a machine-readable storage medium storing instructions for causing a machine to perform the de-icing control method as described in the above embodiments.

[0038] The above technical solution determines whether to enter de-icing mode or anti-icing mode based on acquired environmental and icing information. In de-icing mode, the wind turbine is shut down, and the total power of all heaters is controlled at a first heating power for de-icing based on the internal blade temperature and heater temperature, until the preset heating time is reached, at which point the wind turbine is restarted. In anti-icing mode, the total power of all heaters is controlled at a second heating power for anti-icing based on the internal blade temperature and heater temperature. Therefore, the wind turbine can maintain efficient operation in cold environments while reducing downtime and maintenance costs caused by icing.

[0039] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0040] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0041] Figure 1 The schematic diagram illustrates a flow chart of a de-icing control method according to an embodiment of this application;

[0042] Figure 2 The illustration shows a detailed flowchart of a de-icing control method according to an embodiment of this application. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of the embodiments of this application and are not intended to limit the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0044] It should be noted that the acquisition, transmission, storage, use, and processing of data in the technical solution of this application all comply with the relevant provisions of national laws and regulations. In the embodiments of this application, certain existing industry solutions such as software, components, and models may be mentioned. These should be considered exemplary, intended only to illustrate the feasibility of implementing the technical solution of this application, and do not imply that the applicant has already used or necessarily used such solutions.

[0045] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0046] Figure 1 A schematic flowchart illustrating a de-icing control method according to an embodiment of this application is shown. Figure 1 As shown in the figure, this application provides a de-icing control method, which may include the following steps:

[0047] Step 100: Based on the acquired environmental and icing information, determine whether to enter de-icing mode or anti-icing mode;

[0048] In this embodiment, it should be noted that environmental information refers to relevant information about the external environment in which the wind turbine is located, including information such as temperature, humidity, and wind speed; icing information includes whether the wind turbine blades are iced, and the thickness of the icing if the blades are icy, which can be detected by sensors installed on the blades, such as icing sensors. Based on the collected environmental and icing information, a decision is made whether to enter de-icing mode or anti-icing mode under the current operating conditions. If the blades are detected to be icy or the risk of icing is high, such as extremely low temperature and high humidity, de-icing mode is entered. If environmental conditions may lead to icing but the risk is low, or to prevent possible future icing, or if there is slight icing but the wind turbine has a high power output, anti-icing mode is entered.

[0049] Step 200: When entering the de-icing mode, stop the operation of the wind turbine and control the total power of all heaters to perform heating and de-icing control at the first heating power based on the internal temperature of the wind turbine blades and the heater temperature, until the heating time reaches the preset heating time, and then start the wind turbine.

[0050] It should be noted that in de-icing mode, the wind turbine is first shut down to ensure safety. Next, based on the internal blade temperature and heater temperature, the total power of all heaters is adjusted to the initial heating power. This initial heating power is relatively high to quickly melt the ice on the blades. The heating process continues until the preset heating time is reached. This time is typically determined based on factors such as blade size, ice thickness, and heating efficiency. After heating is complete, the wind turbine is restarted.

[0051] Step 300: When entering the anti-icing mode, based on the internal temperature of the blades and the temperature of the heaters, control the total power of all heaters to perform heating anti-icing control at a second heating power, wherein the second heating power is less than the first heating power.

[0052] It should be noted that in anti-icing mode, the total power of the heaters is also adjusted based on the internal blade temperature and the heater temperature, but the total power of all heaters is the second heating power. This second heating power is lower than the first heating power in de-icing mode. The purpose is to maintain the blades within a temperature range where icing is unlikely, rather than directly melting the ice. This mode can be used in conditions where the ambient temperature is low but has not yet reached the freezing point, or as a continuing protection measure after de-icing.

[0053] It is understandable that this embodiment controls the heating intensity based on controlling the total power of the heaters. Controlling the total power of all heaters to achieve a first heating power for defrosting can be done by controlling multiple lower-power heaters to operate simultaneously, by controlling a single higher-power heater to operate alone, or by simultaneously controlling one or more heaters of varying power, as long as the total power of all heaters equals the first heating power. The method for controlling the total power of all heaters to reach a second heating power is similar to the method for controlling the total power of all heaters to reach the first heating power.

[0054] In this embodiment, the system determines whether to enter de-icing mode or anti-icing mode based on acquired environmental and icing information. In de-icing mode, the wind turbine is stopped, and based on the blade internal temperature and heater temperature, the total power of all heaters is controlled at a first heating power for de-icing until the preset heating time is reached, at which point the wind turbine is restarted. In anti-icing mode, based on the blade internal temperature and heater temperature, the total power of all heaters is controlled at a second heating power for anti-icing control. Therefore, the wind turbine can maintain efficient operation in cold environments while reducing downtime and maintenance costs caused by icing.

[0055] In one embodiment, environmental information includes temperature, and determining whether to enter de-icing mode or anti-icing mode based on the acquired environmental information and icing information includes:

[0056] When the temperature is below the preset low temperature threshold, it is determined whether icing occurs based on icing information;

[0057] If icing occurs and the icing thickness is greater than or equal to a preset thickness threshold, enter de-icing mode.

[0058] In the absence of icing, or in the presence of icing but with an ice thickness less than a preset thickness threshold, it is determined whether the actual power of the wind turbine is less than a first power threshold, wherein the first power threshold is determined based on a first threshold coefficient and the theoretical power corresponding to the wind speed.

[0059] If the actual power is less than the first power threshold, enter the de-icing mode;

[0060] If the actual power is greater than or equal to the first power threshold, enter the anti-icing mode.

[0061] In this embodiment, it should be noted that the environmental information includes temperature. When determining whether to enter de-icing mode or anti-icing mode, the temperature information can be used to further refine the control, thereby improving the precision of wind turbine de-icing and anti-icing control. (Reference) Figure 2 First, the current ambient temperature is acquired and compared to a preset low-temperature threshold. This preset low-temperature threshold is set based on historical meteorological data and icing risk in the wind turbine's location. If the temperature is greater than or equal to the preset low-temperature threshold, the icing risk is low, and de-icing or icing prevention work is not required. If the temperature is lower than the preset low-temperature threshold, de-icing or icing prevention work is necessary. Specifically, when the temperature is lower than the preset low-temperature threshold, icing information is further used to determine if icing occurs. If icing occurs, the current icing thickness is compared to a preset thickness threshold.

[0062] The de-icing mode is triggered when the ice thickness is greater than or equal to a preset thickness threshold, indicating severe icing requiring immediate de-icing. The wind turbine is the core component of the wind turbine unit, primarily responsible for energy conversion. In cases where icing is absent, or icing exists but the ice thickness is less than the preset thickness threshold, the system will further determine whether to enter de-icing or anti-icing mode based on the actual power of the wind turbine. Specifically, if the actual power is less than a first power threshold when icing is absent or exists but the ice thickness is less than the preset thickness threshold, the system will enter de-icing mode. The first power threshold is determined based on the theoretical power corresponding to the current wind speed and a first threshold coefficient, used to assess whether the wind turbine unit's performance has been impaired due to icing.

[0063] In one embodiment, in cases where ice thickness is not directly detected (e.g., due to icing sensor malfunction or installation failure), the possibility of icing causing a performance degradation in the wind turbine is further considered to improve the accuracy of the judgment. The decision to enter de-icing mode is based on the actual power output of the wind turbine. That is, even if ice thickness is not directly detected, the system will still enter de-icing mode if the temperature is below a preset low-temperature threshold and the actual power output of the wind turbine is below a first power threshold.

[0064] It should be noted that the triggering conditions for the anti-icing mode include: if there is no icing, or if there is icing but the ice thickness is less than a preset thickness threshold, and the actual power of the wind turbine is greater than or equal to a first power threshold, it indicates that although the current environmental conditions may lead to icing, the risk is low, or the performance of the wind turbine is not significantly affected. In this case, the system enters the anti-icing mode, using methods such as low-power heating to prevent possible future icing.

[0065] In this embodiment, the de-icing mode or anti-icing mode is intelligently selected based on real-time environmental information and icing conditions, thereby ensuring continuous, efficient and safe operation in cold environments.

[0066] In one embodiment, based on the internal temperature of the wind turbine blades and the heater temperature, controlling the total power of all heaters to perform heating and de-icing control at a first heating power includes:

[0067] If the heater temperature is less than or equal to the first heater threshold and / or the blade internal temperature of the wind turbine is less than or equal to the first blade temperature threshold, control the total power of all heaters to operate at the first heating power until the heater temperature is greater than the second heater threshold and / or the blade internal temperature is greater than the second blade temperature threshold, then control all heaters to stop operating, wherein the second heater threshold is greater than the first heater threshold and the second blade temperature threshold is greater than the first blade temperature threshold.

[0068] In this embodiment, it should be noted that the heater temperature reflects the heater's operating status and temperature level, and can be detected by a temperature sensor installed at the heater outlet. The blade internal temperature reflects the temperature conditions inside the blade, and can be detected by a temperature sensor installed on the wind deflector.

[0069] Heating and de-icing control is activated when the heater temperature is below or equal to the first heater threshold, or the blade internal temperature is below or equal to the first blade temperature threshold, or both the heater temperature and the blade internal temperature are below or equal to the first blade temperature threshold. At this time, the total power of all heaters is controlled to operate at the first heating power to heat the blades and remove any possible ice. When the heater temperature is above the second heater threshold, or the blade internal temperature is above the second blade temperature threshold, or both the heater temperature and the blade internal temperature are above the second blade temperature threshold, operation of all heaters is stopped. This indicates that the blade and heater temperatures have reached a safe range and further heating is unnecessary. It should be noted that the first heater threshold, second heater threshold, first blade temperature threshold, and second blade temperature threshold can be adaptively adjusted according to the climate conditions and blade material characteristics of the wind turbine's location. The adjustment benchmark aims to ensure effective ice removal while avoiding overheating and damage to the blades or heaters. The first heating power can be dynamically adjusted based on the actual icing condition of the blades and the ambient temperature. For example, in cases of extreme low temperatures or severe icing, the first heating power can be appropriately increased to accelerate the de-icing process.

[0070] In this embodiment, by monitoring the internal temperature of the wind turbine blades and the heater temperature, flexible control of de-icing and anti-icing inside the wind turbine is achieved, ensuring the stable operation of the wind turbine.

[0071] In one embodiment, when the heater temperature is less than or equal to a first heater threshold and / or the internal temperature of the wind turbine blades is less than or equal to a first blade temperature threshold, the total power of all heaters is controlled to operate at a first heating power until the heater temperature exceeds a second heater threshold and / or the internal temperature of the blades exceeds a second blade temperature threshold, at which point all heaters are controlled to stop operating, including:

[0072] When the heater temperature is less than or equal to the first heater threshold and / or the internal temperature of the wind turbine blades is less than or equal to the first blade temperature threshold, control the total power of all heaters to operate at the first heating power.

[0073] Monitor the heater temperature and obtain the heater's heating rate within a preset time range;

[0074] If the heater temperature is greater than the first heater threshold and less than the second heater threshold, and the heating rate is greater than the first rate threshold, then the total power of all heaters is controlled to operate at the third heating power, wherein the third heating power is less than the first heating power.

[0075] If the heater temperature is greater than the first heater threshold and less than the second heater threshold, and the heating rate is less than the first rate threshold and greater than the second rate threshold, then the total power of all heaters is controlled to operate at the fourth heating power, wherein the fourth heating power is less than the third heating power.

[0076] If the heater temperature exceeds the second heater threshold and / or the blade internal temperature exceeds the second blade temperature threshold, control all heaters to stop operating.

[0077] It should be noted that, to ensure the wind turbine operates within an appropriate temperature range, thereby maintaining its performance and efficiency, in this embodiment, when the heater temperature is less than or equal to a first heater threshold and / or the internal temperature of the wind turbine blades is less than or equal to a first blade temperature threshold, the total power of all heaters is controlled to operate using a first heating power, i.e., all heaters are controlled to start fully or partially, so that the total power reaches the first heating power. During heater operation, the heater temperature is continuously monitored, and the heater heating rate is calculated within a preset time range. As the heater temperature rises, if the heater temperature rises to a level greater than the first heater threshold but less than the second heater threshold, it is determined whether the heater heating rate is too high. The first rate threshold is a relatively large threshold used as reference data for whether the heater heating rate is too high. If the heater heating rate is greater than the first rate threshold, the total power of all heaters is reduced to a third heating power. If the heating rate is less than the first rate threshold but greater than the second rate threshold, the total power of all heaters is further reduced to a fourth heating power. The smaller the heating rate, the closer the current heating power is to the ideal state, so the total power can be further reduced to the fourth heating power to save energy or avoid overheating. Meanwhile, different heating conditions are distinguished by a first rate threshold and a second rate threshold. When the heater temperature exceeds the second heater threshold and / or the internal temperature of the blade exceeds the second blade temperature threshold, all heaters are controlled to stop operating.

[0078] In this embodiment, the total power of the heater is flexibly adjusted by combining two factors: temperature and heating rate, so as to optimize energy use and avoid overheating problems while keeping the wind turbine within an appropriate temperature range.

[0079] In one embodiment, based on the internal temperature of the blades and the heater temperature, controlling the total power of all heaters to a second heating power for anti-icing control includes:

[0080] If the heater temperature is less than or equal to the first heater threshold and / or the internal temperature of the wind turbine blade is less than or equal to the first blade temperature threshold, control the total power of all heaters to operate at the second heating power until the heater temperature is greater than the second heater threshold and / or the internal temperature of the blade is greater than the second blade temperature threshold, then control all heaters to stop operating, wherein the second heater threshold is greater than the first heater threshold and the second blade temperature threshold is greater than the first blade temperature threshold.

[0081] In this embodiment, it should be noted that when the heater temperature is less than or equal to the first heater threshold and / or the internal temperature of the wind turbine blades is less than or equal to the first blade temperature threshold, it is considered that there is a risk of icing or preheating is required. Therefore, the total power of all heaters is controlled to operate at the second heating power. The second heating power is a preset, moderate heating power designed to provide sufficient heat to prevent icing while avoiding overheating. When the heater temperature is greater than the second heater threshold and / or the internal temperature of the blades is greater than the second blade temperature threshold, it is considered that the purpose of preventing icing has been achieved and there is no risk of overheating. At this time, all heaters are controlled to stop operating.

[0082] In one embodiment, if the temperature is below a preset low-temperature threshold and there is no icing, or if icing occurs but the ice thickness is less than a preset thickness threshold, and the actual power is greater than or equal to a first power threshold, an anti-icing mode is entered. In this mode, the total power of all heaters is controlled to operate at a second heating power until the actual power is greater than or equal to the second power threshold, at which point all heaters are stopped. It is understood that when the actual power reaches or exceeds the second power threshold, the blade temperature is considered sufficiently high, or the heater output has exceeded a safe range, thus all heaters are stopped. The second power threshold is greater than the first power threshold to ensure sufficient power margin in the anti-icing mode to cope with emergencies and provide additional heating capacity when necessary.

[0083] In this embodiment, the output of the heater is automatically adjusted to prevent the wind turbine blades from icing, while ensuring that the equipment is not damaged due to overheating.

[0084] In one embodiment, the de-icing control method further includes:

[0085] Based on a preset delay start time, the total power of all heaters is controlled to perform heating and de-icing control at a first heating power, or the total power of all heaters is controlled to perform heating and anti-icing control at a second heating power.

[0086] In this embodiment, it should be noted that upon receiving a start signal, for example, due to the detection that the blade temperature is below a certain threshold or the prediction of impending icing conditions, a preset delay start-up time will be initiated. This preset delay start-up time is to ensure that the system has sufficient time to assess the current environmental conditions and blade status before activating the heaters. After the delay start-up time ends, the heating power to be used will be determined based on the current blade temperature, environmental conditions (such as humidity, temperature, etc.), and the potential risk of icing. If there is a high risk of icing, or if it is necessary to quickly remove the formed ice layer, the total power of all heaters will be controlled at a first heating power for de-icing control. The first heating power is typically higher, designed to quickly increase the blade temperature, thereby melting the ice layer. If the current risk of icing is low, or if it is only necessary to maintain the blades within a certain temperature range to prevent icing, the total power of all heaters will be controlled at a second heating power for anti-icing control. The second heating power is typically lower, designed to provide continuous heat to maintain the blade temperature while avoiding overheating and energy waste. During the heating process, the system will continuously monitor the blade temperature and the status of the heaters. If the blade temperature reaches the preset safety threshold or the heater malfunctions, the system will automatically adjust the heating power or stop heating to ensure the safety of the equipment and blades.

[0087] In one embodiment, a delay control for the blower is also included, where a certain time, such as 10 seconds, is waited after the blower starts before allowing the heater to start. This sequential control ensures that the blower has built up sufficient airflow before the heater begins heating, effectively distributing heat across the entire wind turbine blades. This helps prevent localized overheating of the heater and improves heating efficiency. Before each attempt to start the heater, the system delays for a certain time, such as 60 seconds, to prevent frequent starts in a short period, thus avoiding unnecessary thermal and mechanical stress on the heater and extending its service life. A longer delay, such as 120 seconds, is also placed before attempting to start the blower to protect it from damage caused by frequent starts in a short period. The blower is typically more sensitive to frequent starts than the heater, thus requiring a longer delay to ensure stable operation.

[0088] In this embodiment, a preset delay start-up time and different heating powers are combined to flexibly respond to different icing risks and heating requirements. By automatically adjusting the heating power, the system can effectively perform heating de-icing or anti-icing control while ensuring blade safety.

[0089] This application provides a de-icing control device, including:

[0090] The memory is configured to store instructions;

[0091] The processor is configured to retrieve instructions from memory and, when executing the instructions, to implement the de-icing control method as described in the above embodiments.

[0092] This application provides a wind turbine generator set, including:

[0093] De-icing control device as described in the above embodiments;

[0094] blade;

[0095] Wind turbine.

[0096] This application provides a wind power generation system, including:

[0097] The wind turbine unit as described in the above embodiments;

[0098] Energy storage subsystem, used to store electrical energy;

[0099] Grid connection control system is used to transmit the electrical energy generated by the wind power generation system to the power grid.

[0100] This application provides a machine-readable storage medium storing instructions that cause a machine to perform the de-icing control method as described in the above embodiments.

[0101] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0102] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0103] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0104] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0105] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0106] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0107] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0108] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0109] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A de-icing control method, characterized in that, include: Based on the acquired environmental and icing information, determine whether to enter de-icing mode or anti-icing mode; When the de-icing mode is entered, the operation of the wind turbine is stopped, and based on the internal temperature of the wind turbine blades and the temperature of the heaters, the total power of all heaters is controlled to perform heating and de-icing control at the first heating power until the heating time reaches the preset heating time, and then the wind turbine is started. When the anti-icing mode is entered, based on the internal temperature of the blade and the temperature of the heater, the total power of all heaters is controlled to perform heating anti-icing control at a second heating power, wherein the second heating power is less than the first heating power; The environmental information includes temperature and wind speed. The process of determining whether to enter de-icing mode or anti-icing mode based on the acquired environmental and icing information includes: If the temperature is lower than a preset low temperature threshold, it is determined whether icing occurs based on the icing information. If the icing phenomenon exists and the icing thickness is greater than or equal to a preset thickness threshold, enter the de-icing mode. In the absence of the icing phenomenon, or in the presence of the icing phenomenon but the icing thickness is less than the preset thickness threshold, it is determined whether the actual power of the wind turbine is less than a first power threshold, wherein the first power threshold is determined based on a first threshold coefficient and the theoretical power corresponding to the wind speed. If the actual power is less than the first power threshold, enter the de-icing mode; If the actual power is greater than or equal to the first power threshold, enter the anti-icing mode.

2. The de-icing control method according to claim 1, characterized in that, The control of heating and de-icing based on the internal temperature of the wind turbine blades and the heater temperature, using a first heating power, includes: If the heater temperature is less than or equal to a first heater threshold and / or the blade internal temperature of the wind turbine is less than or equal to a first blade temperature threshold, control the total power of all the heaters to operate at a first heating power until the heater temperature is greater than a second heater threshold and / or the blade internal temperature is greater than a second blade temperature threshold, then control all the heaters to stop operating, wherein the second heater threshold is greater than the first heater threshold and the second blade temperature threshold is greater than the first blade temperature threshold.

3. The de-icing control method according to claim 2, characterized in that, When the heater temperature is less than or equal to a first heater threshold and / or the internal temperature of the wind turbine blades is less than or equal to a first blade temperature threshold, the total power of all heaters is controlled to operate at a first heating power until the heater temperature exceeds a second heater threshold and / or the internal temperature of the blades exceeds a second blade temperature threshold, at which point all heaters are controlled to stop operating, including: When the heater temperature is less than or equal to the first heater threshold and / or the internal temperature of the wind turbine blades is less than or equal to the first blade temperature threshold, the total power of all the heaters is controlled to operate at the first heating power. Monitor the temperature of the heater and obtain the heating rate of the heater within a preset time range; If the heater temperature is greater than the first heater threshold and less than the second heater threshold, and the heating rate is greater than the first rate threshold, then the total power of all the heaters is controlled to operate at a third heating power, wherein the third heating power is less than the first heating power. If the heater temperature is greater than the first heater threshold and less than the second heater threshold, and the heating rate is less than the first rate threshold and greater than the second rate threshold, then the total power of all heaters is controlled to operate at a fourth heating power, wherein the fourth heating power is less than the third heating power. If the heater temperature exceeds the second heater threshold and / or the blade internal temperature exceeds the second blade temperature threshold, control all heaters to stop operating.

4. The de-icing control method according to claim 1, characterized in that, The method of controlling the total power of all heaters to a second heating power for anti-icing control based on the internal temperature of the blades and the heater temperature includes: If the heater temperature is less than or equal to the first heater threshold and / or the blade internal temperature of the wind turbine is less than or equal to the first blade temperature threshold, control the total power of all the heaters to operate at the second heating power until the heater temperature is greater than the second heater threshold and / or the blade internal temperature is greater than the second blade temperature threshold, then control all the heaters to stop operating, wherein the second heater threshold is greater than the first heater threshold and the second blade temperature threshold is greater than the first blade temperature threshold.

5. The de-icing control method according to claim 1, characterized in that, Also includes: Based on a preset delay start time, the total power of all the heaters is controlled to perform heating and de-icing control at the first heating power, or the total power of all the heaters is controlled to perform heating and anti-icing control at the second heating power.

6. A de-icing control device, characterized in that, include: The memory is configured to store instructions; The processor is configured to retrieve the instructions from the memory and, when executing the instructions, to implement the de-icing control method according to any one of claims 1 to 5.

7. A wind turbine generator set, characterized in that, include: The de-icing control device according to claim 6; blade; Wind turbine.

8. A wind power generation system, characterized in that, include: The wind turbine generator set according to claim 7; Energy storage subsystem, used to store electrical energy; A grid-connected control system is used to transmit the electrical energy generated by the wind power generation system to the power grid.

9. A machine-readable storage medium, characterized in that, The machine-readable storage medium stores instructions for causing the machine to perform the de-icing control method according to any one of claims 1 to 5.

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