Wind turbine generator blade deicing method, system and equipment and medium

Abstract

The invention belongs to the technical field of wind power generation, and relates to a wind turbine generator blade deicing method, system and equipment and a medium. Comprising the following steps: acquiring environment temperature and humidity; determining that the environment temperature and humidity meet icing conditions; acquiring the generating capacity of the wind turbine generator and the power consumption of the deicing system in the future set time; determining that the generating capacity of the wind turbine generator is greater than the power consumption of the deicing system; and the deicing system is started to deice the iced blade. The power generation gain caused by operation of the deicing system can be improved, and the safety risk caused by deicing is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power generation, and relates to a method, system, equipment and medium for deicing blades of a wind turbine set. Background Art

[0002] With the rapid development of my country's wind power industry, the scale of wind turbines has continued to expand, and wind power production is moving towards efficiency, safety and economy. This trend has put forward higher technical requirements for the auxiliary equipment of wind power systems, especially under extreme climatic conditions. How to ensure the stable operation of wind turbines has become the focus of industry attention. Taking the southwestern region of my country as an example, the climate in this region is low temperature and high humidity in winter, and ice is easily formed on the surface of wind turbine blades. Blade ice will not only significantly reduce the aerodynamic performance of wind turbines, resulting in reduced power generation efficiency, but may also cause problems such as unit vibration and load imbalance. In severe cases, it may even cause unit shutdown or equipment damage. In addition, after the ice falls off, it may cause safety hazards to nearby facilities and personnel. For example, falling ice may damage ground equipment or threaten personnel safety, further increasing the risk of wind farm operation.

[0003] At present, the mainstream deicing system in my country mainly adopts technologies such as electric heating, gas heating and coating, aiming to achieve ice protection and removal on the blade surface by heating or surface treatment. The control system usually uses temperature and humidity as the core judgment parameters: when the ambient temperature is lower than the set threshold and the humidity reaches the icing condition, the system automatically starts the deicing equipment; when the temperature and humidity do not meet the icing condition, the system stops the operation of the deicing equipment. Although this control method based on environmental parameters has the advantages of simplicity and reliability, and can meet the basic deicing needs to a certain extent, it still has the following obvious defects: First, the existing de-icing system does not fully consider economic factors during operation. The startup and operation of de-icing equipment consumes a lot of electricity or other energy, but the existing technology does not evaluate whether the de-icing operation can bring positive power generation benefits. For example, in low wind speed or low temperature environment, even if the de-icing operation is completed, the power generation of the wind turbine may not cover the energy consumption cost of the de-icing equipment, resulting in energy waste and economic losses.

[0004] Secondly, the existing technology does not adequately control safety during the de-icing process. Although the de-icing system can effectively remove ice from the blade surface, during the de-icing process, the ice that falls off may cause secondary damage to the wind turbine itself and surrounding facilities. For example, falling ice may damage the tower, nacelle or other power generation equipment, and even threaten the safety of on-site workers. Summary of the invention

[0005] The object of the present invention is to provide a method, system, equipment and medium for deicing blades of a wind turbine generator set to solve the problems in the prior art, improve the power generation gain brought by the operation of the deicing system, and reduce the safety risks brought by deicing.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a method for deicing blades of a wind turbine generator system, comprising the following steps: Get ambient temperature and humidity; Determining that the ambient temperature and humidity meet icing conditions; Obtain the power generation of the wind turbines and the power consumption of the de-icing system within a set time in the future; Make sure the power generated by the wind turbine is greater than the power consumption of the de-icing system; Activate the de-icing system to remove iced blades.

[0007] Preferably, the operating modes of the deicing system include a deicing mode and an anti-icing mode; and the power consumption of the deicing system includes the power consumption in the deicing mode and the power consumption in the anti-icing mode.

[0008] Preferably, the calculation formula for the power consumption of the deicing system is:

[0009] in, The power consumption of the de-icing system; The time required for de-icing mode; is the power consumption in de-icing mode; To set the time; is the power consumption in the anti-icing mode; < .

[0010] Preferably, the setting time range is: 2h< <10h.

[0011] Preferably, the calculation formula for the power generation of the wind turbine is:

[0012] in, is the power generation capacity of the wind turbine.

[0013] Preferably, the specific steps of starting the deicing system to de-ice the iced blades are: starting the deicing system to enter the deicing mode, continuing to run until all the iced blades are completely cleared of ice, and then the deicing system enters the anti-icing mode.

[0014] Preferably, the specific steps of starting the deicing system to enter the deicing mode and continuously operating until all iced blades are completely cleared of ice are: Get the yaw of iced blades; Determining that the icing blade is yawed to within the ice falling control sector; Performing ice coverage detection on the iced blades and generating corresponding detection results; If the detection result is ice coating, the rotation of the iced blade is stopped; Starting the de-icing system to enter the de-icing mode to perform de-icing on the iced blades; Until all frozen blades are completely clear of ice.

[0015] In a second aspect, the present invention provides a wind turbine blade deicing system, comprising: The first module is used to obtain the ambient temperature and humidity; The second module determines that the ambient temperature and humidity meet the icing conditions; The third module obtains the power generation of the wind turbine and the power consumption of the de-icing system within a set time in the future; The fourth module determines that the power generation of the wind turbine is greater than the power consumption of the de-icing system; The fifth module starts the de-icing system to de-ice the iced blades.

[0016] In a third aspect, the present invention provides a computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of a method for deicing blades of a wind turbine when executing the computer program.

[0017] In a fourth aspect, the present invention provides a computer-readable storage medium storing a computer program, wherein the computer program implements the steps of a method for deicing blades of a wind turbine when executed by a processor.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The present invention compares the power generation income of the wind turbine set with the energy consumed by the deicing system within a set future time before performing the deicing operation, thereby ensuring that the energy utilization efficiency and economic benefits can be maximized while ensuring the safe operation of the wind turbine set, thereby avoiding energy waste.

[0019] Furthermore, the present invention ensures through the ice-fall control sector that when the wind turbine blades are covered with ice and ice cubes may fall, no safety hazard will be caused to the surrounding equipment, personnel and the environment; by stopping the rotation of the ice-covered blades, the blades are prevented from generating strong centrifugal force during rotation, causing the ice to fall off the blade surface and be thrown out at a high speed to form the "flying ice" phenomenon, thereby further enhancing the safety of the de-icing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 The present invention is a flow chart of the method for deicing blades of a wind turbine generator set. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings: The first object of the present invention is to provide a method for deicing blades of a wind turbine generator system. Figure 1 As shown, the following steps are included: Get ambient temperature and humidity; Determining that the ambient temperature and humidity meet icing conditions; Obtain the power generation of the wind turbines and the power consumption of the de-icing system within a set time in the future; Make sure the power generated by the wind turbine is greater than the power consumption of the de-icing system; Activate the de-icing system to remove iced blades.

[0029] When the ambient temperature and humidity meet the icing conditions, the de-icing system will not start immediately, but will first conduct an economic analysis to ensure that the power generation benefits of the wind turbine within the set time can be greater than the energy consumed by the de-icing operation. The analysis process is based on a comprehensive consideration of multiple factors such as the current weather, environmental conditions and wind speed. Specifically, the real-time collected environmental data (such as temperature, humidity and wind speed) and the meteorological forecast model predict the wind speed and temperature within the future set time. On this basis, the power generation of the wind turbine during this time period and the power consumption of the de-icing system are further calculated. The power generation of the wind turbine is closely related to the wind speed. The faster the wind speed, the higher the power generation of the wind turbine, and vice versa. The power consumption of the de-icing system is mainly affected by the temperature. The lower the temperature, the thicker and harder the ice layer, and the de-icing system needs to consume more energy to melt the ice layer, so the power consumption increases significantly, and vice versa. By comparing the power generation of the wind turbine and the power consumption of the de-icing system within a set time in the future, the system can determine whether the de-icing operation is economical: if the power generation is greater than the power consumption, it means that the de-icing operation is economically feasible, and the system will start the de-icing procedure; if the power consumption exceeds the power generation, the de-icing operation will not have any economic benefits, and de-icing will be delayed or other energy-saving measures will be taken to avoid energy waste; in actual situations, the severity of the icing risk can be comprehensively considered. If icing may cause blade damage, even if the economic analysis results do not support immediate de-icing, the de-icing operation can be started first to ensure equipment safety, ensuring that the energy utilization efficiency and economic benefits can be maximized while ensuring the safe operation of the wind turbine.

[0030] The working modes of the de-icing system include de-icing mode and anti-icing mode. The de-icing mode is used to remove ice from iced blades. By heating, vibration or hot air injection, the ice layer on the blade surface is quickly melted or peeled off, thereby restoring the aerodynamic performance of the blade and reducing the decrease in power generation efficiency and increase in mechanical load caused by ice. The anti-icing mode is used to prevent the blade from freezing again after the ice is removed. By continuously or intermittently providing heat or anti-icing coating to the blade surface, the blade surface temperature is always kept above the freezing point, thereby avoiding the re-formation of the ice layer.

[0031] The specific steps of starting the deicing system to de-ice the iced blades are: start the deicing system to enter the deicing mode, continue to operate until all the iced blades are completely cleared of ice, and then enter the anti-icing mode. In addition, the blades stop rotating in the deicing mode to prevent the melting or falling ice in the deicing mode from causing damage to equipment and personnel, and the wind turbine does not generate electricity at this time; when the deicing system switches from the deicing mode to the anti-icing mode, the blades rotate and the wind turbine starts to operate and generate electricity.

[0032] The calculation formula for the power consumption of the deicing system is:

[0033] in, The power consumption of the de-icing system; The time required for de-icing mode; is the power consumption in de-icing mode; To set the time; is the power consumption in the anti-icing mode; < .

[0034] The power consumption of the deicing system includes two parts, namely, the power consumption in the deicing mode and the power consumption in the anti-icing mode. The calculation of these two parts of power consumption is based on the temperature prediction within the future set time and the running time of each mode. Since the deicing operation requires a certain amount of time to complete, the running time required for the deicing mode is calculated according to the thickness, distribution and environmental conditions of the ice layer. The anti-icing mode is used to prevent the blades from freezing again after deicing. Its running time is usually the set time minus the time required for the deicing mode to ensure that the blades are always in a protected state during the entire set time. The power consumption in each mode is calculated based on the temperature prediction value within the future set time: in the deicing mode, the lower the temperature, the greater the hardness of the ice layer, the higher the power required for deicing, and the power consumption increases accordingly; in the anti-icing mode, the lower the temperature, the higher the power required to maintain the surface temperature of the blade, and the power consumption increases accordingly.

[0035] The calculation formula for the power generation of the wind turbine is:

[0036] in, is the power generation capacity of the wind turbine.

[0037] The power generation of wind turbines is calculated based on the predicted wind speed within a set time in the future, and its power generation capacity is closely related to the wind speed. In deicing mode, wind turbines need to suspend power generation to perform deicing operations, so their actual power generation time is not the entire set time, but the set time minus the operating time required for deicing mode.

[0038] Generally speaking, the length of modern wind turbine blades is usually between 50 meters and 100 meters. A wind turbine includes three blades. The deicing time of a single blade is about 15 to 30 minutes, and the deicing time of all three blades is about 45 to 90 minutes. In extremely cold or heavily icing conditions, the deicing time may be extended to more than 2 hours. Secondly, when deicing, it is best to do it during the day. The darkness at night may make it impossible to discover problems in the deicing process in time. In addition, the temperature is lower at night, which will further increase the power consumption of the anti-icing system. Therefore, the preferred deicing time is from 8:00 am to 6:00 pm, and the optional time period is a total of 10 hours. Therefore, the time range set in the present invention is: 2h< <10h.

[0039] The specific steps of starting the deicing system to enter the deicing mode and continue to operate until all iced blades are completely cleared of ice are: Get the yaw of iced blades; Determining that the icing blade is yawed to within the ice falling control sector; Performing ice coverage detection on the iced blades and generating corresponding detection results; If the detection result is ice coating, the rotation of the iced blade is stopped; Starting the de-icing system to enter the de-icing mode to perform de-icing on the iced blades; Until all frozen blades are completely clear of ice.

[0040] The ice falling control sectors are divided according to the actual layout of each wind turbine in the wind farm, the terrain conditions and the safety risk assessment results, to ensure that when the wind turbine blades are covered with ice and ice may fall, there will be no safety hazards to the surrounding equipment, personnel and environment. When ice is detected on the blade surface, the rotation of the blade is stopped to prevent the blade from generating strong centrifugal force during rotation, causing the ice to fall off the blade surface and be thrown out at a high speed, forming the "flying ice" phenomenon, which poses a serious threat to personnel and equipment in the surrounding area.

[0041] As another embodiment of the present invention, when the real-time ambient temperature is greater than zero degrees, if the de-icing system is in the de-icing mode, the de-icing system will stop working after all the iced blades are completely cleared of ice, and will not enter the anti-icing mode, because the external temperature at this time is not sufficient to support the blades to freeze again; if the real-time ambient temperature is greater than zero degrees and the de-icing system is already in the anti-icing mode, the de-icing system will stop working directly.

[0042] In a second aspect, the present invention provides a wind turbine blade deicing system, which can significantly improve the economic benefits of a wind farm, including: The first module is used to obtain ambient temperature and humidity, providing accurate basic information for icing judgment and avoiding the lag and inaccuracy of traditional manual monitoring.

[0043] The second module determines whether the ambient temperature and humidity meet the icing conditions. Based on the preset icing condition threshold, it can quickly determine whether there is an icing risk, thereby improving the efficiency and reliability of icing detection.

[0044] The third module obtains the power generation of wind turbines and the power consumption of de-icing systems within a set time in the future. Based on the wind speed and temperature forecast data, it can obtain the power generation of wind turbines and the power consumption of de-icing systems within a set time in the future, providing a scientific basis for the rational use of energy.

[0045] The fourth module determines that the power generation of the wind turbine is greater than the power consumption of the de-icing system; The fifth module starts the de-icing system to de-ice the iced blades to prevent ice accumulation from causing greater damage to the blades and the unit.

[0046] The third object of the present invention is to provide a computer device, which includes a processor and a memory, wherein the memory is used to store a computer program, the computer program includes program instructions, and the processor is used to execute the program instructions stored in the computer storage medium. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, and is specifically suitable for loading and executing one or more instructions in the computer storage medium to implement the corresponding method flow or corresponding function; the processor described in the embodiment of the present invention can be used for the de-icing operation of wind turbine blades.

[0047] The fourth object of the present invention is to provide a storage medium, specifically a computer-readable storage medium (Memory), which is a memory device in a computer device for storing programs and data. It is understandable that the computer-readable storage medium here can include both built-in storage media in the computer device and, of course, extended storage media supported by the computer device. The computer-readable storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the corresponding steps of deicing the wind turbine blades in the above embodiment.

[0048] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented 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.

[0049] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0050] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0051] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for deicing blades of a wind turbine generator set, characterized in that: The following steps are involved: Get ambient temperature and humidity; Determining that the ambient temperature and humidity meet icing conditions; Obtain the power generation of wind turbines and the power consumption of de-icing systems within a set time in the future; Make sure the power generated by the wind turbine is greater than the power consumption of the de-icing system; Activate the de-icing system to remove iced blades.

2. A method for deicing blades of a wind turbine according to claim 1, characterized in that: The working modes of the deicing system include a deicing mode and an anti-icing mode; the power consumption of the deicing system includes the power consumption in the deicing mode and the power consumption in the anti-icing mode.

3. A method for deicing blades of a wind turbine according to claim 2, characterized in that: The calculation formula for the power consumption of the deicing system is: in, The power consumption of the de-icing system; The time required for de-icing mode; is the power consumption in de-icing mode; To set the time; is the power consumption in the anti-icing mode; < .

4. A method for deicing blades of a wind turbine according to claim 3, characterized in that: The setting time range is: 2h< <10h.

5. A method for deicing blades of a wind turbine according to claim 3, characterized in that: The calculation formula for the power generation of the wind turbine is: in, is the power generation capacity of the wind turbine.

6. A method for deicing blades of a wind turbine according to claim 2, characterized in that: The specific steps of starting the deicing system to de-ice the iced blades are: starting the deicing system to enter the deicing mode, continuing to run until all the iced blades are completely cleared of ice, and then the deicing system enters the anti-icing mode.

7. A method for deicing blades of a wind turbine according to claim 6, characterized in that: The specific steps of starting the deicing system to enter the deicing mode and continue to operate until all iced blades are completely cleared of ice are: Get the yaw of the iced blade; Determining that the icing blade is yawed to within the ice falling control sector; Performing ice coverage detection on the iced blades and generating corresponding detection results; If the detection result is ice coating, the rotation of the iced blade is stopped; Starting the de-icing system to enter the de-icing mode to perform de-icing on the iced blades; Until all frozen blades are completely clear of ice.

8. A wind turbine blade deicing system, characterized in that: include: The first module is used to obtain the ambient temperature and humidity; The second module determines that the ambient temperature and humidity meet the icing conditions; The third module obtains the power generation of the wind turbine and the power consumption of the de-icing system within a set future time; The fourth module determines that the power generation of the wind turbine is greater than the power consumption of the de-icing system; The fifth module starts the de-icing system to de-ice the iced blades.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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