Control method and device for wind turbine after ice coating, wind turbine and storage medium

Abstract

The disclosed embodiment provides a control method, device, wind turbine and storage medium for a wind turbine after ice coating, the method comprising: obtaining the operating state parameters and environmental meteorological parameters of the wind turbine, and based on the above, confirming that when the ice coating level is greater than a first preset ice coating level, switching the wind turbine from a normal operating state to a shutdown state; turning the wind turbine from an upwind direction to a downwind direction, switching the wind turbine from a shutdown state to a predetermined operating state, and when a first output power meets a first preset condition, switching the wind turbine from a predetermined operating state to a shutdown state to realize the vibration deicing function of the wind turbine blades. The control method disclosed in the present invention can monitor the ice coating state of the wind turbine, and execute an active yaw downwind wind control strategy. After the ice coating melts due to the increase in temperature, the broken ice will fall in the downwind direction, which can effectively reduce the risk of damaging the hub cover, the deflector and the box transformer, and ensure the safe and reliable operation of the wind turbine.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the field of wind power technology, and in particular to a control method and device for a wind turbine generator set after ice coating, a wind turbine generator set, and a storage medium. Background Art

[0002] With the development of wind power technology, wind turbines have been widely installed in different regions. However, due to extreme environmental conditions, installed wind turbines are often subject to icing disasters, which are usually divided into cloud icing and precipitation icing. Icing disasters often occur in environments with high altitudes, high humidity, and low temperatures, such as plateaus, ridges, and mountain tops. The icing area is mainly concentrated on the leading edge of the blades, which seriously affects the economic benefits of the wind farm and the safe operation of the unit. After the blades are covered with ice, the aerodynamic performance is reduced, resulting in reduced power generation performance. Unbalanced blade icing increases the life loss of the wind turbine.

[0003] Currently, the main means of de-icing are electric heating de-icing, gas heating de-icing and hydrophobic material de-icing technologies. Judging from the current application situation in the industry, the melting and falling of ice after the blades are covered with ice seriously affect the safety of the equipment itself and the personal safety of the operation and maintenance personnel, and the effect is limited. Summary of the invention

[0004] In view of the above-mentioned problems existing in the prior art, the embodiments of the present disclosure provide a control method, device, wind turbine and storage medium for a wind turbine after being covered with ice, so as to solve the following problems in the prior art: after deicing by electric heating deicing, gas heating deicing and hydrophobic material deicing, the melting and falling of ice on the blades after being covered with ice seriously affect the safety of the equipment itself and the personal safety of the operation and maintenance personnel. At the same time, a method for deicing blades is provided to provide a reference for restoring the safe operation of the wind turbine and reduce the operating risks of the operation and maintenance personnel.

[0005] In order to solve the above problems, the technical solution provided by the embodiment of the present disclosure is: a control method for a wind turbine after ice coating, the method comprising:

[0006] Obtaining operating status parameters and environmental meteorological parameters of the wind turbine generator set;

[0007] Based on the operating state parameter and the environmental meteorological parameter, detecting whether the ice coverage level of the wind turbine blade is greater than a first preset ice coverage level;

[0008] When the ice coverage level is greater than the first preset ice coverage level, switching the operating state of the wind turbine generator set from the normal operating state to the shutdown state;

[0009] The nose direction of the wind turbine set is changed from upwind to downwind, and the operation state of the wind turbine set is switched from the shutdown state to a predetermined operation state, wherein a first output power corresponding to the predetermined operation state is less than a second output power corresponding to the normal operation state;

[0010] When the first output power meets a first preset condition, the operating state of the wind turbine generator set is switched from the predetermined operating state to the shutdown state to realize the vibration deicing function of the blades of the wind turbine generator set.

[0011] Furthermore, the operating state parameters of the wind turbine generator set at least include: the current output power and wind speed of the wind turbine generator set, and the environmental meteorological parameters at least include the temperature and humidity of the environment in which the wind turbine generator set is located;

[0012] The step of determining the ice coverage level of the wind turbine blade based on the operating state parameter and the ambient meteorological parameter includes:

[0013] When the temperature is lower than a first preset temperature, the humidity is higher than a preset humidity, and the current output power of the wind turbine generator is different from a second output power corresponding to the wind speed of the wind turbine generator, it is determined that the icing level of the wind turbine generator blades exceeds the first preset icing level.

[0014] Furthermore, before switching the operating state of the wind turbine generator set from the shutdown state to the predetermined operating state, the method further includes:

[0015] Determine whether the current temperature of the environment where the wind turbine generator set is located is higher than a second preset temperature and whether the current light intensity of the environment where the wind turbine generator set is located is greater than a preset light threshold;

[0016] When the temperature is higher than the second preset temperature and the light intensity is greater than the preset light threshold, the operating state of the wind turbine generator set is switched from the shutdown state to the predetermined operating state.

[0017] Further, after switching the operating state of the wind turbine generator set from the predetermined operating state to the shutdown state to realize the vibration deicing function of the blades of the wind turbine generator set, the method includes:

[0018] When the ice coverage level is less than or equal to the first preset ice coverage level, the operating state of the wind turbine generator set is switched from the shutdown state to the normal operating state.

[0019] The embodiment of the present disclosure further provides a control device for a wind turbine after being covered with ice, the device comprising:

[0020] An acquisition module, used to acquire operating status parameters and environmental meteorological parameters of the wind turbine generator set;

[0021] A detection module, configured to detect whether an ice coverage level of the wind turbine blade is greater than a first preset ice coverage level based on the operating state parameter and the environmental meteorological parameter;

[0022] A first switching module, configured to switch the operation state of the wind turbine generator set from the normal operation state to the shutdown state when the ice coverage level is greater than the first preset ice coverage level;

[0023] A second switching module is used to change the nose direction of the wind turbine set from upwind to downwind, and switch the operation state of the wind turbine set from the shutdown state to a predetermined operation state, wherein a first output power corresponding to the predetermined operation state is less than a second output power corresponding to the normal operation state;

[0024] The third switching module is used to switch the operating state of the wind turbine generator set from the predetermined operating state to the shutdown state when the first output power meets the first preset condition, so as to realize the vibration deicing function of the blades of the wind turbine generator set.

[0025] Furthermore, the operating state parameters of the wind turbine generator set at least include: the current output power and wind speed of the wind turbine generator set, and the environmental meteorological parameters at least include the temperature and humidity of the environment in which the wind turbine generator set is located;

[0026] The device also includes a determination module;

[0027] The determination module is used to determine that the ice coating level of the wind turbine blades exceeds the first preset ice coating level when the temperature is lower than a first preset temperature, the humidity is higher than a preset humidity, and the current output power of the wind turbine is different from the second output power corresponding to the wind speed of the wind turbine.

[0028] Furthermore, the second switching module is further used to determine whether the current temperature of the environment where the wind turbine generator set is located is higher than a second preset temperature, and whether the current light intensity of the environment where the wind turbine generator set is located is greater than a preset light threshold;

[0029] When the temperature is higher than the second preset temperature and the light intensity is greater than the preset light threshold, the operating state of the wind turbine generator set is switched from the shutdown state to the predetermined operating state.

[0030] Furthermore, the device also includes a fourth switching module;

[0031] The fourth switching module is used to switch the operating state of the wind turbine generator set from the shutdown state to the normal operating state when the ice coverage level is less than or equal to the first preset ice coverage level.

[0032] An embodiment of the present disclosure further provides a wind turbine generator set, comprising the above-mentioned control device for the wind turbine generator set after ice coating.

[0033] An embodiment of the present disclosure further provides a storage medium storing a computer program, wherein when the computer program is executed by a processor, the steps of the above-mentioned control method for a wind turbine after ice coating are implemented.

[0034] The beneficial effect of the embodiments of the present disclosure is that the control method of the present disclosure can monitor the icing state of the wind turbine and execute an active yaw downwind wind control strategy. After the ice melts due to rising temperature, the broken ice will fall in the downwind direction, which can effectively reduce the risk of damaging components such as the hub cover, the fairing and the transformer box, thereby ensuring the safe and reliable operation of the wind turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic flow chart of a control method for a wind turbine after ice coating provided in the first embodiment of the present disclosure;

[0036] Figure 2 A schematic structural diagram of a control device for a wind turbine after ice coating provided in the second embodiment of the present disclosure. DETAILED DESCRIPTION

[0037] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0038] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present application will occur to those skilled in the art.

[0039] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0040] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0041] It should also be understood that although the present application has been described with reference to some specific examples, those skilled in the art will be able to readily implement many other equivalent forms of the present application.

[0042] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0043] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that obscure the present application. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0044] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0045] my country has rich reserves of wind energy resources, and wind turbines are widely installed in the three northern regions and the southeastern coastal areas. In recent years, due to extreme environmental conditions, icing disasters have occurred frequently. Icing disasters often occur in environments with high altitudes, high humidity, and low temperatures, such as plateaus, ridges, and mountain tops. The icing area is mainly concentrated on the leading edge of the blades, which seriously affects the economic benefits of wind farms and the safe operation of the units. After the blades are covered with ice, the aerodynamic performance is reduced, resulting in reduced power generation performance. The unbalanced icing of the blades increases the life loss of the wind turbines. In addition, the melting and falling of the blades after icing seriously affect the safety of the equipment and the personal safety of the operation and maintenance personnel. The hazard control of blade icing should consider the melting of ice during the icing process and the deicing after icing. The former needs to start from the perspective of blade melting, and consider electric heating deicing, gas heating deicing, and hydrophobic material deicing. From the current application situation in the industry, the effect is limited.

[0046] In order to solve the above technical problems, the embodiments of the present invention provide a control method for a wind turbine after being covered with ice, which can solve the problem that after the existing de-icing technologies such as electric heating de-icing, gas heating de-icing and hydrophobic material de-icing are used, the ice melting and falling after the blades are covered with ice seriously affect the safety of the equipment itself and the personal safety of the operation and maintenance personnel. At the same time, a method for de-icing blades is provided to provide a reference for restoring the safe operation of the wind turbine and reduce the operating risks of the operation and maintenance personnel.

[0047] The first embodiment of the present disclosure provides a control method for a wind turbine after being covered with ice, which can be applied to smart terminal devices, various types of wind turbines and other equipment. The method can effectively de-ice the blades of the wind turbine and can also effectively prevent falling ice from affecting the wind turbine. Figure 1 A flow chart of a control method for a wind turbine after ice coating according to an embodiment of the present disclosure is provided, which mainly includes steps S101 to S105:

[0048] S101, obtaining operating status parameters and environmental meteorological parameters of a wind turbine generator set.

[0049] In the embodiment of the present disclosure, when the wind turbine generator set is in normal operation, the operating status parameters of the wind turbine generator set obtained include at least the output power of the wind turbine generator set and the wind speed of the wind turbine generator set.

[0050] The wind speed of a wind turbine mainly refers to the current wind speed of the wind turbine, which may be the wind speed measured by an anemometer in the nacelle of the wind turbine.

[0051] The output power of a wind turbine generator set refers to the actual current output power of the wind turbine generator set, and the magnitude of the output power is related to the current wind speed of the wind turbine generator set.

[0052] The environmental meteorological parameters at least include the temperature and humidity of the environment in which the wind turbine is located. In specific implementation, the temperature of the wind turbine is preferably the temperature near the center height of the wind turbine hub, or the temperature of the environment around the wind turbine. The specific temperature can be detected according to actual conditions.

[0053] The humidity of the wind turbine generator set is preferably the humidity near the center height of the hub of the wind turbine generator set, and the humidity of the environment surrounding the wind turbine generator set may also be selected. The specific humidity may be detected according to actual conditions.

[0054] S102: Based on the operating state parameters and the ambient meteorological parameters, detecting whether the ice coverage level of the wind turbine blades is greater than a first preset ice coverage level.

[0055] In the disclosed embodiment, the ice coverage level of the wind turbine blade represents the amount of ice on the wind turbine blade, and the higher the ice coverage level, the greater the amount of ice on the blade. For example, the ice coverage level can be in the form of 1-10 levels, and the larger the number, the higher the level, and the greater the amount of ice on the blade.

[0056] The environment in which the wind turbine is located is extremely complex and changeable. Therefore, before detecting the ice coverage level of the wind turbine blades, it is necessary to judge the wind turbine itself and the environment in which it is located. Therefore, when the ambient temperature of the wind turbine is lower than the first preset temperature, the humidity of the environment is lower than the preset humidity, and the current output power of the wind turbine is different from the second output power corresponding to the wind speed of the wind turbine, we can determine that the blades of the wind turbine are already in an ice-covered state.

[0057] In specific implementation, although the wind turbine is already in an ice-covered state, the degree of ice coverage of wind turbines in different environments is also different. Not all ice-covered wind turbines need to be de-iced. Therefore, in order to confirm whether the current degree of ice coverage of the wind turbine blades can affect the operation of the wind turbine itself, it is necessary to further detect whether the current degree of ice coverage of the wind turbine blades can affect the operation of the wind turbine. We can determine whether the ice coverage level of the wind turbine blades is greater than the first preset ice coverage level based on the current output power, wind speed and temperature and humidity of the environment in which the wind turbine is located. When the ice coverage level of the wind turbine blades is greater than the first preset ice coverage level, it means that the wind turbine blades need to be de-iced, otherwise the wind turbine can continue to operate.

[0058] Among them, the second output power corresponding to the wind speed of the wind turbine mainly refers to the ideal output power of the wind turbine at a certain wind speed. Because when the wind turbine is running at a certain wind speed, due to environmental, wind turbine itself and human factors, there is a certain loss when the wind turbine uses wind to generate electricity, so the actual output power of the wind turbine is very different from its ideal power.

[0059] In one embodiment, taking the current environment temperature of the wind turbine as -1°C, the humidity as 90%, and the actual output power corresponding to the current wind speed A of the wind turbine as 1000w as an example, when the temperature of the environment in which the wind turbine is located -1°C is lower than the first preset temperature of 0°C, the humidity is 90% higher than the preset humidity of 85%, and the second output power of 1200w (ideal output power) corresponding to the current wind speed A of the wind turbine is different from the actual output power of 1000w (current output power of the wind turbine), we can determine that the blades of the wind turbine have been covered with ice, so we can determine that the ice coverage level on the blades of the wind turbine is level 5 based on the current actual output power, wind speed of the wind turbine and the temperature and humidity of the environment in which the wind turbine is located, and the ice coverage level of the wind turbine (level 5) is greater than level 3 (the first preset ice coverage level), which means that the wind turbine needs to be de-iced.

[0060] In the embodiment of the present disclosure, if the determined icing level of the wind turbine generator set is level 2 icing, since level 3 icing is less than level 4 icing, the wind turbine generator set needs to perform de-icing operation.

[0061] The ice coverage level can be divided into different levels from 1 to 10. The larger the number, the greater the degree of ice coverage on the wind turbine blades. English letters or special symbols can also be used to indicate the ice coverage level, which can be set according to actual conditions.

[0062] In order to ensure the accuracy of the icing level obtained by the subsequent operating status parameters, parameters such as the rotational speed and pitch angle of the wind turbine blades can also be obtained to assist in determining the icing level of the wind turbine, thereby ensuring that the obtained icing level is more accurate.

[0063] S103: When the ice coverage level is greater than a first preset ice coverage level, switching the operation state of the wind turbine generator set from a normal operation state to a shutdown state.

[0064] In the disclosed embodiment, during the normal operation of the wind turbine, if the blades of the wind turbine are severely covered with ice, it will seriously affect the normal operation of the wind turbine. Therefore, in order to ensure the safety and normal operation of the wind turbine, the wind turbine needs to be shut down. Taking the ice coverage level as 1-10 as an example, if the ice coverage level obtained through steps S101-S102 is level 4, which is greater than the level 3 we set, then we can confirm that the ice coverage level of the wind turbine is enough to affect the operation of the wind turbine, and it is necessary to stop the operation of the wind turbine and switch to the shutdown state. If the determined ice coverage level of the wind turbine is less than the first preset ice coverage level, it means that the current ice coverage level of the wind turbine will not affect its own operation, so no de-icing operation is required.

[0065] S104, the direction of the head of the wind turbine generator set is changed from upwind to downwind, and the operating state of the wind turbine generator set is switched from a shutdown state to a predetermined operating state.

[0066] In the disclosed embodiment, the upwind direction of the wind turbine generator set mainly refers to the direction in which the nose of the wind turbine generator set faces the wind, and the downwind direction of the wind turbine generator set mainly refers to the direction in which the nose of the wind turbine generator set faces the wind.

[0067] In order to reduce the consumption of electric energy during the deicing process, the first output power corresponding to the predetermined operating state is less than the second output power corresponding to the normal operating state. Preferably, the output power corresponding to the predetermined operating state is less than or equal to 50% of the output power corresponding to the normal operating state, and the output power under the specific operating state can be set according to actual conditions.

[0068] In specific implementation, before switching the operating state of the wind turbine from the shutdown state to the predetermined operating state, in order to ensure the safety of de-icing of the wind turbine, it is necessary to detect the current environment of the wind turbine. The specific process is as follows:

[0069] Determine whether the current temperature of the environment in which the wind turbine is located is higher than the second preset temperature and whether the current light intensity of the environment in which the wind turbine is located is greater than the preset light threshold. When the temperature is higher than the second preset temperature and the light intensity is greater than the preset light threshold, switch the operating state of the wind turbine from the shutdown state to the predetermined operating state.

[0070] For example, according to step 104, after the nose direction of the wind turbine is turned from upwind to downwind, the current ambient temperature of the wind turbine to be de-iced is detected to be 1°C and the light intensity is 3. According to the pre-established de-icing rules, the current ambient temperature of the wind turbine to be de-iced is greater than 0°C, and the light intensity is greater than 2. The conditions of whether the current temperature of the environment in which the wind turbine is located is higher than the second preset temperature and whether the current light intensity of the environment in which the wind turbine is located is greater than the preset light threshold are met. Therefore, the operating state of the wind turbine to be de-iced can be switched from the shutdown state to the predetermined operating state.

[0071] When the current ambient temperature of the wind turbine to be de-iced is less than 0°C or / and the light intensity of the current environment of the wind turbine to be de-iced is 1, the wind turbine cannot be de-iced. By detecting the current environment of the wind turbine, it can be better ensured that the wind turbine is in a good de-icing environment and the safety of the de-icing process of the wind turbine is also ensured.

[0072] S105, when the first output power meets the first preset condition, switching the operating state of the wind turbine generator set from a predetermined operating state to a shutdown state, so as to realize the vibration deicing function of the blades of the wind turbine generator set.

[0073] In the embodiment of the present disclosure, the first output power refers to the actual output power corresponding to the current wind speed of the wind turbine generator set when the wind turbine generator set is in a predetermined operating state.

[0074] In the specific implementation, in order to ensure that the wind turbine does not waste electric energy during the de-icing process, the wind turbine needs to be operated in a predetermined operating state, that is, the current output power of the wind turbine must be less than the predetermined power value. The specific process is as follows:

[0075] When the wind turbine enters the predetermined operating state, the current output power of the wind turbine is controlled not to exceed the predetermined output power. After this condition is met, the operating state of the wind turbine is switched from the predetermined operating state to the shutdown state. During this shutdown process, since the wind turbine suddenly enters the shutdown state, the blades vibrate and the ice is broken and separated from the blades, thereby realizing the de-icing function.

[0076] Due to the complexity of the wind turbine environment, in order to ensure that the wind turbine can generate sufficiently large vibrations during the shutdown process, after the wind turbine enters the predetermined operating state, not only the current output power of the wind turbine is controlled not to exceed the predetermined output power, but the current output power of the wind turbine must be greater than the minimum output power. After this condition is met, when the operating state of the wind turbine is switched from the predetermined operating state to the shutdown state, the wind turbine suddenly enters the shutdown state to make the blades vibrate, break the ice and remove it from the blades, thereby realizing the de-icing function.

[0077] In order to ensure the completion of the de-icing work on the wind turbine blades, if the current ice coverage level of the wind turbine is still greater than the first preset ice coverage level, it is necessary to continue to de-ice the wind turbine. When the current ice coverage level of the wind turbine is less than or equal to the first preset ice coverage level, the operating state of the wind turbine will be switched from the shutdown state to the normal operating state.

[0078] In some embodiments, due to the complexity of the environment in which the wind turbine generator set is located, in order to ensure the safety of the deicing process, it is possible to manually determine whether the wind turbine generator set needs deicing. The specific process is as follows:

[0079] The ice on the blades of the wind turbine is slowly and gradually increasing. The wind farm operation and maintenance personnel determine whether de-icing is needed based on the on-site conditions. When the ambient temperature of the wind turbine is lower than the first preset temperature, the ambient light intensity is lower than the preset light threshold, and while reducing the power generation loss, the wind farm operation and maintenance personnel should evaluate the safe distance for blade de-icing and observe from a distance. Specifically, when the wind speed in the environment where the wind turbine is located is lower than the preset wind speed, the wind turbine is started (the operating state of the wind turbine is switched from the shutdown state to the predetermined operating state), the output power of the wind turbine is controlled not to exceed 50% of the ideal power and is shut down normally. During the startup process, the ice on the blades is thrown out by centrifugal force. After normal shutdown, the blades vibrate to break the ice and then separate it from the blades. The wind farm operation and maintenance personnel determine the number of start-stop cycles based on the degree of ice and the de-icing effect on site to complete the blade de-icing.

[0080] The beneficial effect of the embodiments of the present disclosure is that the control method of the present disclosure can monitor the icing state of the wind turbine and execute an active yaw downwind wind control strategy. After the ice melts due to rising temperature, the broken ice will fall in the downwind direction, which can effectively reduce the risk of damaging components such as the hub cover, the fairing and the transformer box, thereby ensuring the safe and reliable operation of the wind turbine.

[0081] A second embodiment of the present disclosure provides a control device for a wind turbine after being covered with ice.

[0082] Figure 2 A schematic diagram of a control device for a wind turbine after ice coating according to an embodiment of the present disclosure is provided.

[0083] like Figure 2 As shown, the control device for the wind turbine after ice coating includes:

[0084] An acquisition module 201 is used to acquire operating status parameters and environmental meteorological parameters of the wind turbine generator set; a detection module 202 is used to detect whether the ice coverage level of the wind turbine generator set blades is greater than a first preset ice coverage level based on the operating status parameters and the environmental meteorological parameters; a first switching module 203 is used to switch the operating status of the wind turbine generator set from a normal operating status to a shutdown status when the ice coverage level is greater than the first preset ice coverage level; a second switching module 204 is used to change the nose direction of the wind turbine generator set from an upwind direction to a downwind direction, and to switch the operating status of the wind turbine generator set from a shutdown status to a predetermined operating status, wherein a first output power corresponding to the predetermined operating status is less than a second output power corresponding to the normal operating status; a third switching module 105 is used to switch the operating status of the wind turbine generator set from a predetermined operating status to a shutdown status when the first output power meets a first preset condition, so as to realize the vibration de-icing function of the wind turbine generator set blades.

[0085] In the embodiment of the present disclosure, when the wind turbine generator set is in normal operation, the acquisition module 201 acquires the operating status parameters of the wind turbine generator set including at least the output power of the wind turbine generator set and the wind speed of the wind turbine generator set.

[0086] The wind speed of a wind turbine mainly refers to the current wind speed of the wind turbine, which may be the wind speed measured by an anemometer in the nacelle of the wind turbine.

[0087] The output power of a wind turbine generator set refers to the actual current output power of the wind turbine generator set, and the magnitude of the output power is related to the current wind speed of the wind turbine generator set.

[0088] The environmental meteorological parameters at least include the temperature and humidity of the environment in which the wind turbine is located. In specific implementation, the temperature of the wind turbine is preferably the temperature near the center height of the wind turbine hub, or the temperature of the environment around the wind turbine can be selected, which can be measured by a thermometer. The specific temperature can be detected according to actual conditions.

[0089] The humidity of the wind turbine generator set is preferably the humidity near the center height of the hub of the wind turbine generator set, and the humidity of the environment surrounding the wind turbine generator set may also be selected. The specific humidity may be detected according to actual conditions.

[0090] In the disclosed embodiment, the upwind direction of the wind turbine generator set mainly refers to the direction in which the nose of the wind turbine generator set faces the wind, and the downwind direction of the wind turbine generator set mainly refers to the direction in which the nose of the wind turbine generator set faces the wind.

[0091] In order to reduce the consumption of electric energy during the deicing process, the first output power corresponding to the predetermined operating state is less than the second output power corresponding to the normal operating state. Preferably, the output power corresponding to the predetermined operating state is less than or equal to 50% of the output power corresponding to the normal operating state, and the output power under the specific operating state can be set according to actual conditions.

[0092] In a specific implementation, the control device after the wind turbine is covered with ice also includes a determination module, which is used to determine that the ice coverage level of the wind turbine blades exceeds a first preset ice coverage level when the temperature is lower than a first preset temperature, the humidity is higher than a preset humidity, and the current output power of the wind turbine is different from the second output power corresponding to the wind speed of the wind turbine.

[0093] In the disclosed embodiment, the ice coverage level of the wind turbine blade represents the amount of ice on the wind turbine blade, and the higher the ice coverage level, the greater the amount of ice on the blade. For example, the ice coverage level can be in the form of 1-10 levels, and the larger the number, the higher the level, and the greater the amount of ice on the blade.

[0094] The environment in which the wind turbine is located is extremely complex and changeable. Therefore, before detecting the ice coverage level of the wind turbine blades, it is necessary to judge the wind turbine itself and the environment in which it is located. Therefore, when the ambient temperature of the wind turbine is lower than the first preset temperature, the humidity of the environment is lower than the preset humidity, and the current output power of the wind turbine is different from the second output power corresponding to the wind speed of the wind turbine, we can determine that the blades of the wind turbine are already in an ice-covered state.

[0095] In specific implementation, although the wind turbine is already in an ice-covered state, the degree of ice coverage of wind turbines in different environments is also different. Not all ice-covered wind turbines need to be de-iced. Therefore, in order to confirm whether the current degree of ice coverage of the wind turbine blades can affect the operation of the wind turbine itself, it is necessary to further detect whether the current degree of ice coverage of the wind turbine blades can affect the operation of the wind turbine. We can determine whether the ice coverage level of the wind turbine blades is greater than the first preset ice coverage level based on the current output power, wind speed and temperature and humidity of the environment in which the wind turbine is located. When the ice coverage level of the wind turbine blades is greater than the first preset ice coverage level, it means that the wind turbine blades need to be de-iced, otherwise the wind turbine can continue to operate.

[0096] Among them, the second output power corresponding to the wind speed of the wind turbine mainly refers to the ideal output power of the wind turbine at a certain wind speed. Because when the wind turbine is running at a certain wind speed, due to environmental, wind turbine itself and human factors, there is a certain loss when the wind turbine uses wind to generate electricity, so the actual output power of the wind turbine is very different from its ideal power.

[0097] In one embodiment, taking the current environment temperature of the wind turbine as -1°C, the humidity as 90%, and the actual output power corresponding to the current wind speed A of the wind turbine as 1000w as an example, when the temperature of the environment in which the wind turbine is located -1°C is lower than the first preset temperature of 0°C, the humidity is 90% higher than the preset humidity of 85%, and the second output power of 1200w (ideal output power) corresponding to the current wind speed A of the wind turbine is different from the actual output power of 1000w (current output power of the wind turbine), we can determine that the blades of the wind turbine have been covered with ice, so we can determine that the ice coverage level on the blades of the wind turbine is level 5 based on the current actual output power, wind speed of the wind turbine and the temperature and humidity of the environment in which the wind turbine is located, and the ice coverage level of the wind turbine (level 5) is greater than level 3 (the first preset ice coverage level), which means that the wind turbine needs to be de-iced.

[0098] In the embodiment of the present disclosure, if the determined icing level of the wind turbine generator set is level 2 icing, since level 3 icing is less than level 4 icing, the wind turbine generator set needs to perform de-icing operation.

[0099] The ice coverage level can be divided into different levels from 1 to 10. The larger the number, the greater the degree of ice coverage on the wind turbine blades. English letters or special symbols can also be used to indicate the ice coverage level, which can be set according to actual conditions.

[0100] In order to ensure that the icing level obtained by using the operating status parameters is accurate, the acquisition module 201 can also obtain parameters such as the rotation speed and pitch angle of the wind turbine blades to assist in determining the icing level of the wind turbine and ensure that the obtained icing level is more accurate.

[0101] In specific implementation, the second switching module 204 is also used to determine whether the current temperature of the environment in which the wind turbine is located is higher than the second preset temperature, and whether the current light intensity of the environment in which the wind turbine is located is greater than the preset light threshold. When the temperature is higher than the second preset temperature and the light intensity is greater than the preset light threshold, the operating state of the wind turbine is switched from the shutdown state to the predetermined operating state.

[0102] In the implementation of the present disclosure, before switching the operating state of the wind turbine generator set from the shutdown state to the predetermined operating state, in order to ensure the safety of de-icing of the wind turbine generator set, it is necessary to detect the current environment of the wind turbine generator set. The specific process is as follows:

[0103] Determine whether the current temperature of the environment in which the wind turbine is located is higher than the second preset temperature and whether the current light intensity of the environment in which the wind turbine is located is greater than the preset light threshold. When the temperature is higher than the second preset temperature and the light intensity is greater than the preset light threshold, switch the operating state of the wind turbine from the shutdown state to the predetermined operating state.

[0104] For example, according to step 104, after the nose direction of the wind turbine is turned from upwind to downwind, the current ambient temperature of the wind turbine to be de-iced is detected to be 1°C and the light intensity is 3. According to the pre-established de-icing rules, the current ambient temperature of the wind turbine to be de-iced is greater than 0°C, and the light intensity is greater than 2. The conditions of whether the current temperature of the environment in which the wind turbine is located is higher than the second preset temperature and whether the current light intensity of the environment in which the wind turbine is located is greater than the preset light threshold are met. Therefore, the operating state of the wind turbine to be de-iced can be switched from the shutdown state to the predetermined operating state.

[0105] When the current ambient temperature of the wind turbine to be de-iced is less than 0°C or / and the light intensity of the current environment of the wind turbine to be de-iced is 1, the wind turbine cannot be de-iced. By detecting the current environment of the wind turbine, it can be better ensured that the wind turbine is in a good de-icing environment and the safety of the de-icing process of the wind turbine is also ensured.

[0106] In a specific implementation, the control device for the wind turbine after ice coating also includes a fourth switching module, which is used to switch the operating state of the wind turbine from the shutdown state to the normal operating state when the ice coating level is less than or equal to the first preset ice coating level.

[0107] In the disclosed embodiment, during the normal operation of the wind turbine, if the blades of the wind turbine are severely covered with ice, it will seriously affect the normal operation of the wind turbine. Therefore, in order to ensure the safety and normal operation of the wind turbine, the wind turbine needs to be shut down. Taking the ice coverage level as 1-10 as an example, if the obtained ice coverage level is level 4, which is greater than the level 3 we set, then we can confirm that the ice coverage level of the wind turbine is enough to affect the operation of the wind turbine, and it is necessary to stop the operation of the wind turbine and switch it to the shutdown state. If the determined ice coverage level of the wind turbine is less than the first preset ice coverage level, it means that the current ice coverage level of the wind turbine will not affect its own operation, so no de-icing operation is required.

[0108] In the specific implementation, in order to ensure that the wind turbine does not waste electric energy during the de-icing process, the wind turbine needs to be operated in a predetermined operating state, that is, the current output power of the wind turbine must be less than the predetermined power value. The specific process is as follows:

[0109] When the wind turbine enters the predetermined operating state, the current output power of the wind turbine is controlled not to exceed the predetermined output power. After this condition is met, the operating state of the wind turbine is switched from the predetermined operating state to the shutdown state. During this shutdown process, since the wind turbine suddenly enters the shutdown state, the blades vibrate and the ice is broken and separated from the blades, thereby realizing the de-icing function.

[0110] Due to the complexity of the wind turbine environment, in order to ensure that the wind turbine can generate sufficiently large vibrations during the shutdown process, after the wind turbine enters the predetermined operating state, not only the current output power of the wind turbine is controlled not to exceed the predetermined output power, but the current output power of the wind turbine must be greater than the minimum output power. After this condition is met, when the operating state of the wind turbine is switched from the predetermined operating state to the shutdown state, the wind turbine suddenly enters the shutdown state to make the blades vibrate, break the ice and remove it from the blades, thereby realizing the de-icing function.

[0111] In order to ensure the completion of the de-icing work on the wind turbine blades, if the current ice coverage level of the wind turbine is still greater than the first preset ice coverage level, it is necessary to continue to de-ice the wind turbine. When the current ice coverage level of the wind turbine is less than or equal to the first preset ice coverage level, the operating state of the wind turbine will be switched from the shutdown state to the normal operating state.

[0112] In some embodiments, due to the complexity of the environment in which the wind turbine generator set is located, in order to ensure the safety of the deicing process, it is possible to manually determine whether the wind turbine generator set needs deicing. The specific process is as follows:

[0113] The ice on the blades of the wind turbine is slowly and gradually increasing. The wind farm operation and maintenance personnel determine whether de-icing is needed based on the on-site conditions. When the ambient temperature of the wind turbine is lower than the first preset temperature, the ambient light intensity is lower than the preset light threshold, and while reducing the power generation loss, the wind farm operation and maintenance personnel should evaluate the safe distance for blade de-icing and observe from a distance. Specifically, when the wind speed in the environment where the wind turbine is located is lower than the preset wind speed, the wind turbine is started (the operating state of the wind turbine is switched from the shutdown state to the predetermined operating state), the output power of the wind turbine is controlled not to exceed 50% of the ideal power and is shut down normally. During the startup process, the ice on the blades is thrown out by centrifugal force. After normal shutdown, the blades vibrate to break the ice and then separate it from the blades. The wind farm operation and maintenance personnel determine the number of start-stop cycles based on the degree of ice and the de-icing effect on site to complete the blade de-icing.

[0114] The control method disclosed in the present invention can monitor the icing status of the wind turbine and execute an active yaw downwind wind control strategy. After the ice melts due to rising temperature, the broken ice will fall in the downwind direction, which can effectively reduce the risk of damaging components such as the hub cover, fairing and transformer, thereby ensuring the safe and reliable operation of the wind turbine.

[0115] A third embodiment of the present disclosure provides a wind turbine generator set, comprising at least one of the control devices for controlling wind turbine generator sets after ice coating according to the second aspect, such as Figure 2 As shown, the control device for the wind turbine after ice coating includes:

[0116] An acquisition module 201 is used to acquire operating status parameters and environmental meteorological parameters of the wind turbine generator set; a detection module 202 is used to detect whether the ice coverage level of the wind turbine generator set blades is greater than a first preset ice coverage level based on the operating status parameters and the environmental meteorological parameters; a first switching module 203 is used to switch the operating status of the wind turbine generator set from a normal operating status to a shutdown status when the ice coverage level is greater than the first preset ice coverage level; a second switching module 204 is used to change the nose direction of the wind turbine generator set from an upwind direction to a downwind direction, and to switch the operating status of the wind turbine generator set from a shutdown status to a predetermined operating status, wherein a first output power corresponding to the predetermined operating status is less than a second output power corresponding to the normal operating status; a third switching module 205 is used to switch the operating status of the wind turbine generator set from a predetermined operating status to a shutdown status when the first output power meets a first preset condition, so as to realize the vibration de-icing function of the wind turbine generator set blades.

[0117] In the embodiment of the present disclosure, when the wind turbine generator set is in normal operation, the acquisition module 201 acquires the operating status parameters of the wind turbine generator set including at least the output power of the wind turbine generator set and the wind speed of the wind turbine generator set.

[0118] The wind speed of a wind turbine mainly refers to the current wind speed of the wind turbine, which may be the wind speed measured by an anemometer in the nacelle of the wind turbine.

[0119] The output power of a wind turbine generator set refers to the actual current output power of the wind turbine generator set, and the magnitude of the output power is related to the current wind speed of the wind turbine generator set.

[0120] The environmental meteorological parameters at least include the temperature and humidity of the environment in which the wind turbine is located. In specific implementation, the temperature of the wind turbine is preferably the temperature near the center height of the wind turbine hub, or the temperature of the environment around the wind turbine can be selected, which can be measured by a thermometer. The specific temperature can be detected according to actual conditions.

[0121] The humidity of the wind turbine generator set is preferably the humidity near the center height of the hub of the wind turbine generator set, and the humidity of the environment surrounding the wind turbine generator set may also be selected. The specific humidity may be detected according to actual conditions.

[0122] In the disclosed embodiment, the upwind direction of the wind turbine generator set mainly refers to the direction in which the nose of the wind turbine generator set faces the wind, and the downwind direction of the wind turbine generator set mainly refers to the direction in which the nose of the wind turbine generator set faces the wind.

[0123] In order to reduce the consumption of electric energy during the deicing process, the first output power corresponding to the predetermined operating state is less than the second output power corresponding to the normal operating state. Preferably, the output power corresponding to the predetermined operating state is less than or equal to 50% of the output power corresponding to the normal operating state, and the output power under the specific operating state can be set according to actual conditions.

[0124] In a specific implementation, the control device after the wind turbine is covered with ice also includes a determination module, which is used to determine that the ice coverage level of the wind turbine blades exceeds a first preset ice coverage level when the temperature is lower than a first preset temperature, the humidity is higher than a preset humidity, and the current output power of the wind turbine is different from the second output power corresponding to the wind speed of the wind turbine.

[0125] In the disclosed embodiment, the ice coverage level of the wind turbine blade represents the amount of ice on the wind turbine blade, and the higher the ice coverage level, the greater the amount of ice on the blade. For example, the ice coverage level can be in the form of 1-10 levels, and the larger the number, the higher the level, and the greater the amount of ice on the blade.

[0126] The environment in which the wind turbine is located is extremely complex and changeable. Therefore, before detecting the ice coverage level of the wind turbine blades, it is necessary to judge the wind turbine itself and the environment in which it is located. Therefore, when the ambient temperature of the wind turbine is lower than the first preset temperature, the humidity of the environment is lower than the preset humidity, and the current output power of the wind turbine is different from the second output power corresponding to the wind speed of the wind turbine, we can determine that the blades of the wind turbine are already in an ice-covered state.

[0127] In specific implementation, although the wind turbine is already in an ice-covered state, the degree of ice coverage of wind turbines in different environments is also different. Not all ice-covered wind turbines need to be de-iced. Therefore, in order to confirm whether the current degree of ice coverage of the wind turbine blades can affect the operation of the wind turbine itself, it is necessary to further detect whether the current degree of ice coverage of the wind turbine blades can affect the operation of the wind turbine. We can determine whether the ice coverage level of the wind turbine blades is greater than the first preset ice coverage level based on the current output power, wind speed and temperature and humidity of the environment in which the wind turbine is located. When the ice coverage level of the wind turbine blades is greater than the first preset ice coverage level, it means that the wind turbine blades need to be de-iced, otherwise the wind turbine can continue to operate.

[0128] Among them, the second output power corresponding to the wind speed of the wind turbine mainly refers to the ideal output power of the wind turbine at a certain wind speed. Because when the wind turbine is running at a certain wind speed, due to environmental, wind turbine itself and human factors, there is a certain loss when the wind turbine uses wind to generate electricity, so the actual output power of the wind turbine is very different from its ideal power.

[0129] In one embodiment, taking the current environment temperature of the wind turbine as -1°C, the humidity as 90%, and the actual output power corresponding to the current wind speed A of the wind turbine as 1000w as an example, when the temperature of the environment in which the wind turbine is located -1°C is lower than the first preset temperature of 0°C, the humidity is 90% higher than the preset humidity of 85%, and the second output power of 1200w (ideal output power) corresponding to the current wind speed A of the wind turbine is different from the actual output power of 1000w (current output power of the wind turbine), we can determine that the blades of the wind turbine have been covered with ice, so we can determine that the ice coverage level on the blades of the wind turbine is level 5 based on the current actual output power, wind speed of the wind turbine and the temperature and humidity of the environment in which the wind turbine is located, and the ice coverage level of the wind turbine (level 5) is greater than level 3 (the first preset ice coverage level), which means that the wind turbine needs to be de-iced.

[0130] In the embodiment of the present disclosure, if the determined icing level of the wind turbine generator set is level 2 icing, since level 3 icing is less than level 4 icing, the wind turbine generator set needs to perform de-icing operation.

[0131] The ice coverage level can be divided into different levels from 1 to 10. The larger the number, the greater the degree of ice coverage on the wind turbine blades. English letters or special symbols can also be used to indicate the ice coverage level, which can be set according to actual conditions.

[0132] In order to ensure that the icing level obtained by using the operating status parameters is accurate, the acquisition module 201 can also obtain parameters such as the rotation speed and pitch angle of the wind turbine blades to assist in determining the icing level of the wind turbine and ensure that the obtained icing level is more accurate.

[0133] In specific implementation, the second switching module 204 is also used to determine whether the current temperature of the environment in which the wind turbine is located is higher than the second preset temperature, and whether the current light intensity of the environment in which the wind turbine is located is greater than the preset light threshold. When the temperature is higher than the second preset temperature and the light intensity is greater than the preset light threshold, the operating state of the wind turbine is switched from the shutdown state to the predetermined operating state.

[0134] In the implementation of the present disclosure, before switching the operating state of the wind turbine generator set from the shutdown state to the predetermined operating state, in order to ensure the safety of de-icing of the wind turbine generator set, it is necessary to detect the current environment of the wind turbine generator set. The specific process is as follows:

[0135] Determine whether the current temperature of the environment in which the wind turbine is located is higher than the second preset temperature and whether the current light intensity of the environment in which the wind turbine is located is greater than the preset light threshold. When the temperature is higher than the second preset temperature and the light intensity is greater than the preset light threshold, switch the operating state of the wind turbine from the shutdown state to the predetermined operating state.

[0136] For example, according to step 104, after the nose direction of the wind turbine is turned from upwind to downwind, the current ambient temperature of the wind turbine to be de-iced is detected to be 1°C and the light intensity is 3. According to the pre-established de-icing rules, the current ambient temperature of the wind turbine to be de-iced is greater than 0°C, and the light intensity is greater than 2. The conditions of whether the current temperature of the environment in which the wind turbine is located is higher than the second preset temperature and whether the current light intensity of the environment in which the wind turbine is located is greater than the preset light threshold are met. Therefore, the operating state of the wind turbine to be de-iced can be switched from the shutdown state to the predetermined operating state.

[0137] When the current ambient temperature of the wind turbine to be de-iced is less than 0°C or / and the light intensity of the current environment of the wind turbine to be de-iced is 1, the wind turbine cannot be de-iced. By detecting the current environment of the wind turbine, it can be better ensured that the wind turbine is in a good de-icing environment and the safety of the de-icing process of the wind turbine is also ensured.

[0138] In a specific implementation, the control device for the wind turbine after ice coating also includes a fourth switching module, which is used to switch the operating state of the wind turbine from the shutdown state to the normal operating state when the ice coating level is less than or equal to the first preset ice coating level.

[0139] In the disclosed embodiment, during the normal operation of the wind turbine, if the blades of the wind turbine are severely covered with ice, it will seriously affect the normal operation of the wind turbine. Therefore, in order to ensure the safety and normal operation of the wind turbine, the wind turbine needs to be shut down. Taking the ice coverage level as 1-10 as an example, if the obtained ice coverage level is level 4, which is greater than the level 3 we set, then we can confirm that the ice coverage level of the wind turbine is enough to affect the operation of the wind turbine, and it is necessary to stop the operation of the wind turbine and switch it to the shutdown state. If the determined ice coverage level of the wind turbine is less than the first preset ice coverage level, it means that the current ice coverage level of the wind turbine will not affect its own operation, so no de-icing operation is required.

[0140] In the specific implementation, in order to ensure that the wind turbine does not waste electric energy during the de-icing process, the wind turbine needs to be operated in a predetermined operating state, that is, the current output power of the wind turbine must be less than the predetermined power value. The specific process is as follows:

[0141] When the wind turbine enters the predetermined operating state, the current output power of the wind turbine is controlled not to exceed the predetermined output power. After this condition is met, the operating state of the wind turbine is switched from the predetermined operating state to the shutdown state. During this shutdown process, since the wind turbine suddenly enters the shutdown state, the blades vibrate and the ice is broken and separated from the blades, thereby realizing the de-icing function.

[0142] Due to the complexity of the wind turbine environment, in order to ensure that the wind turbine can generate sufficiently large vibrations during the shutdown process, after the wind turbine enters the predetermined operating state, not only the current output power of the wind turbine is controlled not to exceed the predetermined output power, but the current output power of the wind turbine must be greater than the minimum output power. After this condition is met, when the operating state of the wind turbine is switched from the predetermined operating state to the shutdown state, the wind turbine suddenly enters the shutdown state to make the blades vibrate, break the ice and remove it from the blades, thereby realizing the de-icing function.

[0143] In order to ensure the completion of the de-icing work on the wind turbine blades, if the current ice coverage level of the wind turbine is still greater than the first preset ice coverage level, it is necessary to continue to de-ice the wind turbine. When the current ice coverage level of the wind turbine is less than or equal to the first preset ice coverage level, the operating state of the wind turbine will be switched from the shutdown state to the normal operating state.

[0144] In some embodiments, due to the complexity of the environment in which the wind turbine generator set is located, in order to ensure the safety of the deicing process, it is possible to manually determine whether the wind turbine generator set needs deicing. The specific process is as follows:

[0145] The ice on the blades of the wind turbine is slowly and gradually increasing. The wind farm operation and maintenance personnel determine whether de-icing is needed based on the on-site conditions. When the ambient temperature of the wind turbine is lower than the first preset temperature, the ambient light intensity is lower than the preset light threshold, and while reducing the power generation loss, the wind farm operation and maintenance personnel should evaluate the safe distance for blade de-icing and observe from a distance. Specifically, when the wind speed in the environment where the wind turbine is located is lower than the preset wind speed, the wind turbine is started (the operating state of the wind turbine is switched from the shutdown state to the predetermined operating state), the output power of the wind turbine is controlled not to exceed 50% of the ideal power and is shut down normally. During the startup process, the ice on the blades is thrown out by centrifugal force. After normal shutdown, the blades vibrate to break the ice and then separate it from the blades. The wind farm operation and maintenance personnel determine the number of start-stop cycles based on the degree of ice and the de-icing effect on site to complete the blade de-icing.

[0146] A fourth embodiment of the present disclosure provides a storage medium, which is specifically a computer-readable medium, storing a computer program. When the computer program is executed by a processor, the method provided by any embodiment of the present disclosure is implemented, including the following steps S31 to S35:

[0147] S31, obtaining operating status parameters and environmental meteorological parameters of the wind turbine generator set.

[0148] S32: Based on the operating state parameters and the ambient meteorological parameters, detecting whether the ice coverage level of the wind turbine blades is greater than a first preset ice coverage level.

[0149] S33: When the ice coverage level is greater than a first preset ice coverage level, switching the operation state of the wind turbine generator set from a normal operation state to a shutdown state.

[0150] S34, turning the nose direction of the wind turbine set from upwind to downwind, and switching the operating state of the wind turbine set from the shutdown state to a predetermined operating state, wherein a first output power corresponding to the predetermined operating state is less than a second output power corresponding to the normal operating state.

[0151] S35, when the first output power meets the first preset condition, switching the operating state of the wind turbine generator set from a predetermined operating state to a shutdown state, so as to realize the vibration deicing function of the blades of the wind turbine generator set.

[0152] When the computer program is executed by the processor to detect whether the ice coverage level of the wind turbine blades is greater than the first preset ice coverage level based on the operating state parameters and the environmental meteorological parameters, the processor specifically executes the following steps:

[0153] When the temperature is lower than the first preset temperature, the humidity is higher than the preset humidity, and the current output power of the wind turbine generator is different from the second output power corresponding to the wind speed of the wind turbine generator, it is determined that the icing level of the wind turbine generator blades exceeds the first preset icing level.

[0154] Before the computer program is executed by the processor to switch the operating state of the wind turbine generator set from the shutdown state to the predetermined operating state, the processor also executes the following steps:

[0155] Determine whether the current temperature of the environment where the wind turbine generator set is located is higher than the second preset temperature and whether the current light intensity of the environment where the wind turbine generator set is located is greater than the preset light threshold;

[0156] When the temperature is higher than the second preset temperature and the light intensity is greater than the preset light threshold, the operation state of the wind turbine generator set is switched from the shutdown state to the predetermined operation state.

[0157] After the computer program is executed by the processor to switch the operating state of the wind turbine generator set from a predetermined operating state to a shutdown state to realize the vibration deicing function of the blades of the wind turbine generator set, the processor specifically executes the following steps:

[0158] When the ice coverage level is less than or equal to the first preset ice coverage level, the operating state of the wind turbine generator set is switched from the shutdown state to the normal operating state.

[0159] The control method disclosed in the present invention can monitor the icing status of the wind turbine and execute an active yaw downwind wind control strategy. After the ice melts due to rising temperature, the broken ice will fall in the downwind direction, which can effectively reduce the risk of damaging components such as the hub cover, fairing and transformer, thereby ensuring the safe and reliable operation of the wind turbine.

[0160] The device provided by the implementation of the present disclosure can execute the process and steps of the above-mentioned method embodiment, and also has functional modules corresponding to the above-mentioned method embodiment, can perform corresponding operations, and has corresponding technical effects. To avoid repetition, it will not be repeated here.

[0161] The above embodiments are only exemplary embodiments of the present disclosure and are not intended to limit the present disclosure. The protection scope of the present disclosure is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present disclosure within the essence and protection scope of the present disclosure, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present disclosure.

Claims

1. A control method for a wind turbine after ice coating, characterized in that: The method comprises: Acquire the operating state parameters and environmental meteorological parameters of the wind turbine generator set, wherein the environmental meteorological parameters at least include the temperature and humidity of the environment in which the wind turbine generator set is located, wherein the temperature includes the temperature near the center height of the hub of the wind turbine generator set, and the humidity includes the humidity near the center height of the hub of the wind turbine generator set; Based on the operating state parameter and the environmental meteorological parameter, detecting whether the ice coverage level of the wind turbine blade is greater than a first preset ice coverage level; When the ice coverage level is greater than the first preset ice coverage level, switching the operating state of the wind turbine generator set from a normal operating state to a shutdown state; The nose direction of the wind turbine set is changed from upwind to downwind, and the operation state of the wind turbine set is switched from the shutdown state to a predetermined operation state, wherein a first output power corresponding to the predetermined operation state is less than a second output power corresponding to the normal operation state; When the first output power meets a first preset condition, switching the operating state of the wind turbine generator set from the predetermined operating state to the shutdown state to achieve a vibration deicing function of the blades of the wind turbine generator set; The operating status parameters of the wind turbine generator set at least include: the current output power and wind speed of the wind turbine generator set; The detecting, based on the operating state parameter and the ambient meteorological parameter, whether the ice coverage level of the wind turbine blade is greater than a first preset ice coverage level comprises: When the temperature is lower than a first preset temperature, the humidity is higher than a preset humidity, and the current output power of the wind turbine generator set is different from a second output power corresponding to the wind speed of the wind turbine generator set, determining that the ice coverage level of the wind turbine generator set blade exceeds the first preset ice coverage level; Before switching the operating state of the wind turbine generator set from the shutdown state to the predetermined operating state, the method further includes: Determine whether the current temperature of the environment where the wind turbine generator set is located is higher than a second preset temperature and whether the current light intensity of the environment where the wind turbine generator set is located is greater than a preset light threshold; When the temperature is higher than the second preset temperature and the light intensity is greater than the preset light threshold, the operating state of the wind turbine generator set is switched from the shutdown state to the predetermined operating state.

2. The control method for wind turbines after icing according to claim 1, characterized in that: After the operating state of the wind turbine generator set is switched from the predetermined operating state to the shutdown state to realize the vibration deicing function of the blades of the wind turbine generator set, the method includes: When the ice coverage level is less than or equal to the first preset ice coverage level, the operating state of the wind turbine generator set is switched from the shutdown state to the normal operating state.

3. A control device for wind turbines after ice coating, characterized in that: The device comprises: An acquisition module, used for acquiring the operating state parameters and environmental meteorological parameters of the wind turbine set, wherein the environmental meteorological parameters at least include the temperature and humidity of the environment in which the wind turbine set is located, wherein the temperature includes the temperature near the center height of the hub of the wind turbine set, and the humidity includes the humidity near the center height of the hub of the wind turbine set; A detection module, configured to detect whether an ice coverage level of the wind turbine blade is greater than a first preset ice coverage level based on the operating state parameter and the environmental meteorological parameter; A first switching module, configured to switch the operation state of the wind turbine generator set from a normal operation state to a shutdown state when the ice coverage level is greater than the first preset ice coverage level; A second switching module is used to change the nose direction of the wind turbine set from upwind to downwind, and switch the operation state of the wind turbine set from the shutdown state to a predetermined operation state, wherein a first output power corresponding to the predetermined operation state is less than a second output power corresponding to the normal operation state; a third switching module, configured to switch the operating state of the wind turbine generator set from the predetermined operating state to the shutdown state when the first output power satisfies a first preset condition, so as to realize a vibration deicing function of the blades of the wind turbine generator set; The operating status parameters of the wind turbine generator set at least include: the current output power and wind speed of the wind turbine generator set; The device also includes a determination module; The determination module is used to determine that the ice coverage level of the wind turbine blade exceeds the first preset ice coverage level when the temperature is lower than the first preset temperature, the humidity is higher than the preset humidity, and the current output power of the wind turbine is different from the second output power corresponding to the wind speed of the wind turbine; The second switching module is further used to determine whether the current temperature of the environment where the wind turbine generator set is located is higher than a second preset temperature, and whether the current light intensity of the environment where the wind turbine generator set is located is greater than a preset light threshold; When the temperature is higher than the second preset temperature and the light intensity is greater than the preset light threshold, the operating state of the wind turbine generator set is switched from the shutdown state to the predetermined operating state.

4. The control device for wind turbines after icing according to claim 3, characterized in that: The device also includes a fourth switching module; The fourth switching module is used to switch the operating state of the wind turbine generator set from the shutdown state to the normal operating state when the ice coverage level is less than or equal to the first preset ice coverage level.

5. A wind turbine generator set, characterized in that: It comprises the control device for a wind turbine after ice coating as claimed in any one of claims 3 to 4.

6. A storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the control method for a wind turbine after ice coating according to any one of claims 1 to 2 is implemented.

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