Wind turbine blade icing detection method, device and system

Abstract

The present disclosure relates to a wind turbine blade icing detection method, device and system. The method comprises: in the power generation state of the wind turbine, obtaining a current wind speed value and a current pitch angle and a current power value of the wind turbine; selecting a first expected power value matched with the current pitch angle and the current power value from a preset three-dimensional mapping relationship diagram; the three-dimensional mapping relationship diagram comprises a first mapping relationship of the pitch angle, the power value and the wind speed value of the wind turbine in the non-icing condition; comparing the current power value with the first expected power value to obtain a comparison result; and determining whether the wind turbine blade is iced according to the comparison result. The present scheme improves the blade icing detection efficiency.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of wind power generation, and particularly relates to a wind turbine blade icing detection method, device and system. BACKGROUND

[0002] In the related art, when the wind turbine blade surface is covered with ice, the ice load on each blade is different, which increases the unbalanced load of the unit, thereby reducing the service life of the wind turbine parts, causing great harm to the unit; the original aerodynamic shape of the blade will change, reducing the wind energy utilization coefficient of the unit, thereby reducing the power generation power, and in severe cases, the wind turbine unit may not start normally; if the wind turbine continues to run at this time, the ice layer fragments or large ice blocks falling out may harm the wind turbine itself and people or objects nearby. One of the traditional icing detection methods is to additionally install a detection device, such as an optical fiber sensor, ultrasonic detection, image detection, and the cost of this method based on data is high; another traditional icing detection method needs to generate a wind speed power trend curve based on the collected data, and then compares the wind speed power trend curve with a preset wind speed power curve to determine whether icing occurs, which requires a large amount of data and results in slow detection speed. SUMMARY

[0003] To overcome the problems in the related art, the present disclosure provides a wind turbine blade icing detection method, device and system.

[0004] According to a first aspect of the embodiments of the present disclosure, a wind turbine blade icing detection method is provided, comprising:

[0005] In the wind turbine power generation state, a current wind speed value and a current pitch angle and a current power value of the wind turbine are obtained;

[0006] A first expected power value matched with the current pitch angle and the current power value is selected from a preset three-dimensional mapping relationship diagram; the three-dimensional mapping relationship diagram includes a first mapping relationship of the pitch angle, the power value and the wind speed value of the wind turbine in the non-icing state;

[0007] The current power value and the first expected power value are compared to obtain a comparison result;

[0008] Whether the wind turbine blade is iced is determined according to the comparison result.

[0009] In some embodiments of the present disclosure, the comparison of the current power value and the first expected power value to obtain the comparison result comprises:

[0010] According to the current wind speed value and the current pitch angle, a first preset ratio corresponding to the wind turbine is obtained.

[0011] determining a product of the first preset ratio and the first expected power value, to obtain a first threshold value;

[0012] comparing the current power value with the first threshold value, to obtain a comparison result;

[0013] determining whether the wind turbine blade is iced according to the comparison result, including:

[0014] in a case where the comparison result is that the current power value is less than or equal to the first threshold value, determining that the wind turbine blade is iced.

[0015] In some embodiments of the present disclosure, before the first preset ratio corresponding to the wind turbine is obtained according to the current wind speed value and the current pitch angle, the method can further include:

[0016] using a wind turbine simulation model, simulating a process in which the wind turbine runs at different pitch angles and different wind speed values in the blade icing state according to the mapping relationship between the pitch angle and the wind speed value in the three-dimensional mapping relationship diagram, to obtain a simulation power value and a second mapping relationship of simulation power value, pitch angle and wind speed value;

[0017] for each simulation power value, selecting a second expected power value corresponding to the pitch angle and the wind speed value matched with the simulation power value from the three-dimensional mapping relationship diagram, calculating a proportion value of the target simulation power value in the second expected power value, to obtain a first preset ratio corresponding to the simulation power value.

[0018] In some embodiments of the present disclosure, the determination of whether the wind turbine blade is iced according to the comparison result includes:

[0019] obtaining a current air temperature of an area where the wind turbine is located;

[0020] in a case where the current air temperature is less than 4℃ and the comparison result does not meet a preset condition, determining that the wind turbine blade is iced.

[0021] In some embodiments of the present disclosure, the method further includes:

[0022] in a case where it is determined that the wind turbine blade has been in the icing state for a preset length of time, controlling the wind turbine blade to stop running.

[0023] According to a second aspect of the embodiments of the present disclosure, a wind turbine blade icing detection device is provided, characterized in that it includes:

[0024] The acquisition unit is configured to acquire a current wind speed value and current pitch angle and current power value of the wind turbine generator set in a power generation state of the wind turbine generator set.

[0025] The selection unit is configured to select, from a preset three-dimensional mapping relationship diagram, a first expected power value that matches the current pitch angle and current power value and the current wind speed value, wherein the three-dimensional mapping relationship diagram includes a first mapping relationship between the pitch angle, power value and wind speed value of the wind turbine generator set in a non-icing condition.

[0026] The comparison unit is configured to compare the current power value with the first expected power value to obtain a comparison result.

[0027] The determination unit is configured to determine whether the blades of the wind turbine generator set are iced according to the comparison result.

[0028] In some embodiments of the present disclosure, the comparison unit is specifically configured to:

[0029] acquire a first preset ratio corresponding to the wind turbine generator set according to the current wind speed value and the current pitch angle;

[0030] determine a first threshold value by multiplying the first preset ratio and the first expected power value;

[0031] compare the current power value with the first threshold value to obtain the comparison result;

[0032] determine whether the blades of the wind turbine generator set are iced according to the comparison result, including:

[0033] in a case where the comparison result is that the current power value is less than or equal to the first threshold value, determining that the blades of the wind turbine generator set are iced.

[0034] According to a third aspect of embodiments of the present disclosure, an electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the method according to any one of the first aspect when executing the computer program.

[0035] According to a fourth aspect of embodiments of the present disclosure, a computer readable storage medium is provided, and the computer readable storage medium stores a computer program, and the computer program is executable on a processor to implement the method according to any one of the first aspect.

[0036] According to a fifth aspect of embodiments of the present disclosure, a computer program product is provided, and the computer program product includes a computer program, and the computer program is executable on a processor to implement the method according to any one of the first aspect.

[0037] The technical scheme provided by the embodiment of the present disclosure can have the following beneficial effects: by obtaining the current wind speed value and the current pitch angle and the current power value of the wind turbine generator set in the power generation state of the wind turbine generator set, selecting the first expected power value matched with the current pitch angle and the current power value from the preset three-dimensional mapping relationship diagram from the current pitch angle and the current wind speed value, the three-dimensional mapping relationship diagram includes the first mapping relationship of the pitch angle, the power value and the wind speed value of the wind turbine generator set in the non-icing condition, comparing the current power value with the first expected power value to obtain a comparison result, and determining whether the wind turbine generator set blade is iced according to the comparison result, the three-dimensional mapping relationship diagram can be used to quickly and accurately determine whether the wind turbine generator set blade is iced, and the blade icing detection efficiency is improved.

[0038] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0039] The accompanying drawings, which are incorporated into and form part of the specification, illustrate an embodiment consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0040] Figure 1 FIG. 1 is a flowchart of a wind turbine generator set blade icing detection method according to an exemplary embodiment.

[0041] Figure 2 FIG. 2 is a stable working point wind speed-pitch angle relationship curve according to an embodiment of the present disclosure.

[0042] Figure 3 FIG. 3 is a three-dimensional mapping relationship diagram according to an embodiment of the present disclosure.

[0043] Figure 4 FIG. 4 is a block diagram of a wind turbine generator set blade icing detection device according to an exemplary embodiment.

[0044] Figure 5 FIG. 5 is a block diagram of a device for a wind turbine generator set blade icing detection method according to an exemplary embodiment. DETAILED DESCRIPTION

[0045] The exemplary embodiments will be described in detail herein with reference to the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present disclosure. Instead, they are merely examples of apparatuses and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0046] The terminology used in the disclosure of the embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting thereof. As used herein, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0047] It is to be understood that the terms first, second, third, etc. can be employed merely for distinguishing between information entities of a same type, and not necessarily for describing a sequence or order. Accordingly, these terms are used herein merely to distinguish one information entity from another information entity of a same type.

[0048] In addition, the steps of various forms shown in the disclosure can be reordered, added or deleted. For example, the steps described in the present application can be executed in parallel, sequentially or in different order, as long as the desired results of the technical solutions disclosed in the disclosure can be achieved, which is not limited herein.

[0049] In the related art, when the surface of the fan blade is iced, the imbalance load of the unit is increased due to the different ice loads on each blade, thereby reducing the service life of the parts of the fan, causing great harm to the unit; the original aerodynamic shape of the blade will change, reducing the wind energy utilization coefficient of the unit, thereby reducing the power generation power, and in severe cases, the wind turbine generator set cannot start normally; if the fan continues to run at this time, the ice layer fragments or large ice blocks that fall out may harm the fan itself and people or objects near it. One of the traditional icing detection methods is to additionally install a detection device, such as an optical fiber sensor, ultrasonic detection, image detection, and the cost of this method based on data is high; another traditional icing detection method needs to generate a wind speed power trend curve based on the collected data first, and then compares the wind speed power trend curve with the preset wind speed power curve to determine whether icing occurs, which requires a large amount of data and results in slow detection speed.

[0050] To solve the above problems, the present disclosure provides a wind turbine blade icing detection method, device and system. In the power generation state of the wind turbine, the current wind speed value and the current pitch angle and current power value of the wind turbine are obtained. The pitch angle and the current wind speed value are selected from a preset three-dimensional mapping relationship diagram to obtain a first expected power value matched with the current pitch angle and current power value. The three-dimensional mapping relationship diagram includes a first mapping relationship of the pitch angle, power value and wind speed value of the wind turbine in the non-icing state. The current power value is compared with the first expected power value to obtain a comparison result. Whether the wind turbine blade is icing is determined according to the comparison result, so that the three-dimensional mapping relationship diagram can be used to quickly and accurately determine whether the wind turbine blade is icing, and the blade icing detection efficiency is improved.

[0051] Figure 1 A flowchart of a wind turbine blade icing detection method according to an exemplary embodiment is shown in FIG. 1. As shown in FIG. 1, it should be noted that the wind turbine blade icing detection method of the present embodiment is applied to a wind turbine blade icing detection device. As shown in FIG. 2, the method can include the following steps: Figure 1 Figure 1

[0052] Step 101, in the power generation state of the wind turbine, the current wind speed value and the current pitch angle and current power value of the wind turbine are obtained.

[0053] It should be noted that according to the basic theory of wind power generation:

[0054]

[0055] Where P is the active power of the unit, p is the air density, R is the radius of the impeller, C p is the wind energy utilization rate, l is the tip speed ratio, G is the gear box speed ratio, 1 for direct drive unit, and w is the generator speed.

[0056] During the maximum wind energy capture period below the rated wind speed, the pitch angle is generally 0°. At this time, the unit operates at the optimal tip speed ratio, and the power is related to the wind speed.

[0057] When the steady state working point is above the rated wind speed, the input torque of the wind turbine is shown as follows:

[0058]

[0059] Where T r is the input torque of the wind turbine. T0 is the input torque of the wind turbine at the stable working point x0, v is the wind speed at the hub of the wind wheel, b is the pitch angle of the wind turbine, and w r is the rotational speed of the wind wheel at the stable working point. ​​

[0060] Let wherein, wherein, k v is a sensitive coefficient of wind speed to torque, k β is a sensitive coefficient of pitch angle to torque, k Ω is a sensitive coefficient of rotating speed to torque, then

[0061] ΔT r = k v *Δv + k β *Δβ + k Ω *ΔΩ r

[0062] Because working at the rated rotating speed stable point Ω r , because the stable working point, the power is invariable, thus k v *Δv + k β *Δβ = 0.

[0063] The wind speed and pitch angle relationship curve diagram of the wind turbine at the stable working point is shown in Figure 2 .

[0064] Therefore, it can be understood that, in the case that the wind turbine blade is not icing, the power value and the pitch angle and the wind speed exist mapping relationship.

[0065] Therefore, the current wind speed value and the current pitch angle and the current power value of the wind turbine can be collected in the power generation state of the wind turbine, so as to judge whether the blade icing condition exists. In addition, the present disclosure only detects whether the blade is iced based on the pitch angle, wind speed and power, without the need for additional installation of detection devices, thereby reducing the detection cost.

[0066] Step 102, selecting a first expected power value matched with the current pitch angle and the current power value from the preset three-dimensional mapping relationship diagram.

[0067] As shown in Figure 3 , the three-dimensional mapping relationship diagram includes a first mapping relationship of the pitch angle, the power value and the wind speed value of the wind turbine in the non-icing case.

[0068] In one embodiment, the above-mentioned three-dimensional mapping relationship diagram can be generated by using the historical operation data of the wind turbine in the non-icing case, and the above-mentioned three-dimensional mapping relationship diagram can also be generated by using the simulation model to simulate the operation process of the above-mentioned wind turbine in the non-icing case, obtaining the simulation operation data, and using the simulation operation data to generate the above-mentioned three-dimensional mapping relationship diagram.

[0069] It can be understood that the above-mentioned first expected power value is the power value in the case that the blade is not iced, that is, the power value in the normal operation case of the wind turbine.

[0070] Step 103, comparing the current power value with the first expected power value to obtain a comparison result.

[0071] It can be understood that the current power value of the wind turbine generator is compared with the first expected power value corresponding to the wind turbine generator normally operating under the same wind speed and the same pitch angle under the current operating state, so as to determine whether there is icing.

[0072] In some embodiments of the present disclosure, step 103 can specifically include the following steps:

[0073] Step a1, obtaining a first preset ratio corresponding to the wind turbine generator according to the current wind speed value and the current pitch angle;

[0074] Step a2, determining a product of the first preset ratio and the first expected power value to obtain a first threshold value;

[0075] Step a3, comparing the current power value with the first threshold value to obtain a comparison result;

[0076] Step 104 can specifically include:

[0077] In the case that the comparison result is that the current power value is less than or equal to the first threshold value, it is determined that the wind turbine generator blade is iced.

[0078] It can be understood that due to measurement errors and some slight operating state differences, there will be a certain difference between the current power value and the corresponding first expected power value even if the wind turbine generator is not iced, and therefore, whether the blade is iced can be determined according to the difference between the current power value and the corresponding first expected power value.

[0079] In addition, different first preset ratios can be assigned to different wind turbine generators according to actual conditions, and a first preset ratio matching the wind turbine generator to be detected can be selected.

[0080] In one embodiment, the first preset ratio can be multiplied by the first expected power value to obtain the first threshold value, and in the case that the current power value is less than or equal to the first threshold value, it indicates that the difference between the current power value and the first expected power value is large, and it is determined that the wind turbine generator blade is iced.

[0081] In some embodiments of the present disclosure, before step a1, the method can further include the following steps:

[0082] The wind turbine generator simulation model is adopted to simulate the process of the wind turbine generator operating under different pitch angles and different wind speed values under the blade icing state according to the mapping relationship of the pitch angle and the wind speed value in the three-dimensional mapping relationship diagram, to obtain a simulation power value and a second mapping relationship of the simulation power value, the pitch angle and the wind speed value.

[0083] For each simulated power value, a second expected power value matched with the pitch angle and the wind speed value corresponding to the simulated power value is selected from the three-dimensional mapping relationship diagram, a proportion value of the target simulated power value in the second expected power value is calculated, and a first preset ratio value corresponding to the simulated power value is obtained.

[0084] In one embodiment, a wind turbine simulation model can be used to simulate the simulated power value of the wind turbine under the condition of blade icing, different wind speeds and different pitch angles, so as to determine the proportion value of the simulated power value in the second expected power value, so as to obtain the first preset ratio value, and further determine when the blade starts to ice when the difference between the actual power value and the expected power value of the wind turbine is how much, thereby improving the accuracy of blade icing detection.

[0085] Step 104, determining whether the wind turbine blade is iced according to the comparison result.

[0086] In one embodiment, the difference between the current power value and the first expected power value is determined according to the comparison result, and in the case that the difference is large enough, it is determined that the wind turbine blade is iced, and in the case that the difference is small, it is determined that the wind turbine blade is not iced.

[0087] It should be noted that the present disclosure directly compares the real-time collected wind speed value, the current pitch angle and the current power value of the wind turbine with the three-dimensional mapping relationship diagram to obtain the blade icing detection result, the required data amount for detection is extremely small, and there is no need to accumulate data, which effectively improves the detection speed, and further improves the timeliness of identifying the blade icing of the wind turbine, so as to avoid the risk and loss caused by the blade in time.

[0088] In some embodiments of the present disclosure, step 104 can specifically include the following steps:

[0089] Obtaining the current air temperature of the area where the wind turbine is located;

[0090] In the case that the current air temperature is less than 4℃ and the comparison result does not satisfy the preset condition, it is determined that the wind turbine blade is iced.

[0091] It can be understood that, in order to more accurately determine whether the large difference between the current power value and the first expected power value is caused by blade icing, it can be determined whether the current air temperature is 4℃, if the current temperature is greater than 4℃, the blade will not be iced, and it may be caused by other reasons.

[0092] Therefore, in one embodiment, in a case that the current air temperature is less than 4℃ and the comparison result does not satisfy the preset condition, it is determined that the wind turbine blade is iced, thereby avoiding the problem of inaccurate icing detection result caused by the current power value being lower than the expected power value due to other reasons, and improving the accuracy of the detection result.

[0093] In some embodiments of the present disclosure, the method can further include the following steps:

[0094] In a case that the wind turbine blade is determined to be in the icing state for a preset length of time, the wind turbine blade is controlled to stop running.

[0095] It can be understood that, in order to ensure the stable and safe running of the wind turbine, in a case that the wind turbine blade is determined to be in the icing state for a preset length of time, the wind turbine blade needs to be controlled to stop running in time, so as to avoid affecting the service life of the parts of the wind turbine and to avoid the ice on the blade falling to cause damage to the wind turbine itself and the surrounding personnel and equipment.

[0096] According to the wind turbine blade icing detection method provided in the embodiments of the present disclosure, in the power generation state of the wind turbine, the current wind speed value and the current pitch angle and the current power value of the wind turbine are obtained; the first expected power value matched with the current pitch angle and the current power value is selected from a preset three-dimensional mapping relationship diagram; the three-dimensional mapping relationship diagram includes a first mapping relationship of the pitch angle, the power value and the wind speed value of the wind turbine in the non-icing state; the current power value is compared with the first expected power value to obtain a comparison result; and whether the wind turbine blade is iced is determined according to the comparison result, so that the three-dimensional mapping relationship diagram can be used to quickly and accurately determine whether the wind turbine blade is iced, and the blade icing detection efficiency is improved.

[0097] Figure 4 is a wind turbine blade icing detection device block diagram according to an exemplary embodiment. Referring to Figure 4 The device includes an acquisition unit 401, a selection unit 402, a comparison unit 403 and a determination unit 404.

[0098] The acquisition unit 401 is configured to, in the power generation state of the wind turbine, acquire the current wind speed value and the current pitch angle and the current power value of the wind turbine.

[0099] The selection unit 402 is configured to select the first expected power value matched with the current pitch angle and the current power value from a preset three-dimensional mapping relationship diagram; the three-dimensional mapping relationship diagram includes a first mapping relationship of the pitch angle, the power value and the wind speed value of the wind turbine in the non-icing state.

[0100] The comparison unit 403 is configured to compare the current power value with the first expected power value to obtain a comparison result.

[0101] The determination unit 404 is configured to determine whether the blades of the wind turbine generator are iced according to the comparison result.

[0102] In some embodiments of the present disclosure, the comparison unit 403 is specifically configured to:

[0103] obtain a first preset ratio corresponding to the wind turbine generator according to the current wind speed value and the current pitch angle;

[0104] determine a first threshold value by multiplying the first preset ratio and the first expected power value;

[0105] compare the current power value with the first threshold value to obtain the comparison result;

[0106] determine whether the blades of the wind turbine generator are iced according to the comparison result, including:

[0107] in a case where the comparison result is that the current power value is less than or equal to the first threshold value, it is determined that the blades of the wind turbine generator are iced.

[0108] In some embodiments of the present disclosure, the device can further include:

[0109] The simulation unit is configured to simulate, by using a simulation model of the wind turbine generator, a process in which the wind turbine generator operates at different pitch angles and different wind speed values in the blade icing state according to a mapping relationship between the pitch angle and the wind speed value in the three-dimensional mapping relationship diagram to obtain a simulation power value and a second mapping relationship between the simulation power value, the pitch angle and the wind speed value.

[0110] The calculation unit is configured to, for each simulation power value, select a second expected power value corresponding to the pitch angle and the wind speed value matched with the simulation power value from the three-dimensional mapping relationship diagram, calculate a proportion value of the target simulation power value in the second expected power value to obtain a first preset ratio corresponding to the simulation power value.

[0111] In some embodiments of the present disclosure, the determination unit 404 is specifically configured to:

[0112] obtain a current air temperature of a region where the wind turbine generator is located;

[0113] in a case where the current air temperature is less than 4 DEG C and the comparison result does not satisfy a preset condition, it is determined that the blades of the wind turbine generator are iced.

[0114] In some embodiments of the present disclosure, the device can further include:

[0115] The control unit is configured to control the wind turbine blades to stop running when it is determined that the wind turbine blades are in the icing state for a preset length of time.

[0116] As to the apparatus in the above embodiments, the specific manners in which various modules perform operations have been described in detail in the embodiments of the method, and thus will not be described in detail here.

[0117] The wind turbine blade icing detection apparatus according to the embodiments of the present disclosure can obtain the current wind speed value and the current pitch angle and the current power value of the wind turbine under the power generation state of the wind turbine, select a first expected power value matched with the current pitch angle and the current power value from a preset three-dimensional mapping relationship diagram, and the three-dimensional mapping relationship diagram includes a first mapping relationship of the pitch angle, the power value and the wind speed value of the wind turbine under the non-icing condition, compare the current power value with the first expected power value to obtain a comparison result, and determine whether the wind turbine blade is iced according to the comparison result, so that the three-dimensional mapping relationship diagram can be used to quickly and accurately determine whether the wind turbine blade is iced, and the blade icing detection efficiency is improved.

[0118] Figure 5 FIG. 5 is a block diagram of an apparatus for a wind turbine blade icing detection method according to an exemplary embodiment. For example, the apparatus 500 can be an electronic device, such as a programmable logic controller (PLC) or a computer.

[0119] Referring to Figure 5 , the apparatus 500 can include one or more of the following components: a processing component 502, a memory 504, an electric power component 506, a multimedia component 508, a sensor component 514, and a communication component 516.

[0120] The processing component 502 usually controls overall operations of the apparatus 500, such as display, data communication. The processing component 502 can include one or more processors 520 to execute instructions to complete all or part of steps of the methods described above. In addition, the processing component 502 can include one or more modules to facilitate the interaction between the processing component 502 and other components. For example, the processing component 502 can include a multimedia module to facilitate the interaction between the multimedia component 508 and the processing component 502.

[0121] The memory 504 is configured to store various types of data to support the operation of the device 500. Examples of these data include instructions for any application or method operating on the device 500. The memory 504 can be implemented by any type of volatile or nonvolatile storage devices or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable programmable read only memory (EPROM), programmable read only memory (PROM), read only memory (ROM), magnetic storage or flash memory.

[0122] The power component 506 provides power to the various components of the device 500. The power component 506 can include a power management system, one or more power sources, and other components associated with generating, managing and distributing power for the device 500.

[0123] The multimedia component 508 includes a screen providing an output interface between the device 500 and a user. In some embodiments, the screen can include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense a touch, a slide and a gesture on the touch panel. The touch sensor can not only sense a boundary of a touching or a sliding action, but also detect duration and pressure related to the touching or sliding action.

[0124] The sensor component 514 includes one or more sensors to provide an assessment of various aspects of the state of the device 500. For example, the sensor component 514 can include an absolute encoder to assess the orientation of the impeller, the rotational speed of the impeller, and can also include an anemometer to assess the wind speed, and in addition, can include other sensors for wind turbines, such as a vibration sensor, an incremental encoder, an anemometer wind vane, a temperature sensor, a pressure sensor.

[0125] The communication component 516 is configured to facilitate wired or wireless communication between the device 500 and other devices. For example, an industrial bus such as modbus-tcp, modbus-rtu, canopen, profibus, etc. can be used to implement wind turbine network communication.

[0126] In exemplary embodiments, the device 500 can be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic elements for executing the above-described methods.

[0127] In an exemplary embodiment, there is also provided a non-transitory computer- readable storage medium, such as the memory 504 including instructions, which can be executed by the processor 520 of the apparatus 500 to perform the above-described method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disc, and optical data storage device, etc.

[0128] In an exemplary embodiment, there is also provided a computer program product comprising a computer program which, when executed by the processor 520 of the apparatus 500, implements the above-described method.

[0129] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the present disclosure encompass any and all variations, uses, or adaptations of the application following the general principles thereof and including such modifications and alterations within the scope of the present disclosure. It is intended that the specification and examples be considered exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0130] It is to be understood that the application is not limited to the precise details of construction and the exemplary embodiments described above and illustrated in the drawings. The scope of the application is to be determined by the terms of the following claims.

Claims

1. A method of ice detection on a wind turbine blade, characterized in that, The method comprises: obtaining a current wind speed value and a current pitch angle and a current power value of the wind turbine generator set in a power generation state of the wind turbine generator set; selecting a first expected power value matching the current pitch angle and the current power value from a preset three-dimensional mapping relationship diagram, wherein the three-dimensional mapping relationship diagram comprises a first mapping relationship of the pitch angle, the power value and the wind speed value of the wind turbine generator set in a non-icing condition; comparing the current power value with the first expected power value to obtain a comparison result; determining whether the blades of the wind turbine generator set are iced according to the comparison result; wherein the comparison of the current power value with the first expected power value to obtain the comparison result comprises: obtaining a first preset ratio corresponding to the wind turbine generator set according to the current wind speed value and the current pitch angle; determining a first threshold value as a product of the first preset ratio and the first expected power value; comparing the current power value with the first threshold value to obtain the comparison result; determining whether the blades of the wind turbine generator set are iced according to the comparison result comprises: in a case where the comparison result is that the current power value is less than or equal to the first threshold value, determining that the blades of the wind turbine generator set are iced; wherein, before the obtaining of the first preset ratio corresponding to the wind turbine generator set according to the current wind speed value and the current pitch angle, the method further comprises: using a wind turbine generator set simulation model to simulate a process of the wind turbine generator set operating at different pitch angles and different wind speed values in a blade icing state according to the mapping relationship of the pitch angle and the wind speed value in the three-dimensional mapping relationship diagram, to obtain a simulation power value and a second mapping relationship of the simulation power value, the pitch angle and the wind speed value; for each simulation power value, selecting a second expected power value matching the pitch angle and the wind speed value corresponding to the simulation power value from the three-dimensional mapping relationship diagram, and calculating a proportion of the simulation power value in the second expected power value to obtain the first preset ratio corresponding to the simulation power value.

2. The wind turbine blade icing detection method of claim 1, wherein, The determination of whether the blades of the wind turbine generator set are iced according to the comparison result comprises: obtaining a current air temperature of a region where the wind turbine generator set is located; in a case where the current air temperature is less than 4°C and the comparison result does not satisfy a preset condition, determining that the blades of the wind turbine generator set are iced.

3. The wind turbine blade icing detection method of claim 1, wherein, The method further comprises: in a case where it is determined that the blades of the wind turbine generator set are continuously in an icing state for a preset time length, controlling the blades of the wind turbine generator set to stop operating.

4. An ice detection device for a wind turbine blade, characterized in that The method comprises: an obtaining unit configured to obtain a current wind speed value and a current pitch angle and a current power value of the wind turbine generator set in a power generation state of the wind turbine generator set; a selecting unit configured to select a first expected power value matching the current pitch angle and the current power value from a preset three-dimensional mapping relationship diagram, wherein the three-dimensional mapping relationship diagram comprises a first mapping relationship of the pitch angle, the power value and the wind speed value of the wind turbine generator set in a non-icing condition; and The comparison unit is configured to compare the current power value with the first expected power value to obtain a comparison result. The determination unit is configured to determine whether the blades of the wind turbine generator are iced according to the comparison result.

5. The wind turbine blade icing detection apparatus according to claim 4, wherein, The comparison unit is specifically configured to: obtain a first preset ratio corresponding to the wind turbine generator according to the current wind speed value and the current pitch angle; determine a first threshold value by multiplying the first preset ratio and the first expected power value; compare the current power value with the first threshold value to obtain the comparison result; determine whether the blades of the wind turbine generator are iced according to the comparison result, including: in a case where the comparison result is that the current power value is less than or equal to the first threshold value, it is determined that the blades of the wind turbine generator are iced.

6. An electronic device, comprising: The computer program is executed by the processor to implement the method according to any one of claims 1 to 3. The computer program is executed by the processor to implement the method according to any one of claims 1 to 3.

7. A computer readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the method according to any one of claims 1 to 3.

8. A computer program product comprising a computer program, characterized in that, ​

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