CN115111125A

CN115111125A - Control method and device for icing wind turbine generator, wind turbine generator and storage medium

Info

Publication number: CN115111125A
Application number: CN202210883899.0A
Authority: CN
Inventors: 孙少华; 卢坤鹏; 曹学铭; 符鹏程
Original assignee: Guangdong Jianheng Offshore Wind Electricity Detection Authentication Center Co ltd; Jianheng Weideyi Guangdong Testing And Certification Co ltd; Zhangbei Jianheng Renewable Energy Technology Service Co ltd; CHINA GENERAL CERTIFICATION CENTER; Huaneng Clean Energy Research Institute
Current assignee: Guangdong Jianheng Offshore Wind Electricity Detection Authentication Center Co ltd; Jianheng Weideyi Guangdong Testing And Certification Co ltd; Zhangbei Jianheng Renewable Energy Technology Service Co ltd; CHINA GENERAL CERTIFICATION CENTER; Huaneng Clean Energy Research Institute
Priority date: 2022-07-26
Filing date: 2022-07-26
Publication date: 2022-09-27

Abstract

The embodiment of the disclosure provides a control method and device for a wind turbine generator after icing, the wind turbine generator and a storage medium, wherein the method comprises the following steps: acquiring operating state parameters and environmental meteorological parameters of the wind turbine generator, and switching the wind turbine generator from a normal operating state to a shutdown state under the condition that the icing level is higher than a first preset icing level; the method comprises the steps of converting the wind turbine from the upwind direction to the downwind direction, switching the wind turbine from the shutdown state to the preset operation state, and switching the wind turbine from the preset operation state to the shutdown state when the first output power meets a first preset condition so as to realize the vibration deicing function of the blades of the wind turbine. By the control method, the icing state of the wind turbine can be monitored, an active yawing downwind direction wind-to-wind control strategy is executed, and crushed ice falls along the downwind direction after the icing melts due to the rise of the air temperature, so that the risk of smashing parts such as a hub cover, a flow guide cover and a box transformer substation is effectively reduced, and the safe and reliable operation of the wind turbine is ensured.

Description

Control method and device for icing wind turbine generator, wind turbine generator and storage medium

Technical Field

The embodiment of the disclosure relates to the technical field of wind power, in particular to a control method and device for a wind turbine generator after icing, the wind turbine generator and a storage medium.

Background

With the development of wind power technology, wind generating sets are widely installed in different regions, but are affected by extreme environmental conditions, and the installed wind generating sets are frequently subjected to icing disasters, which are generally classified into icing in clouds and precipitation icing. Under the environment with high altitude, high humidity and low temperature, such as plateaus, ridges, mountaintops and the like, which are frequently encountered in icing disasters, and icing areas are mainly concentrated on the front edges of the blades, the economic benefit of a wind power plant and the safe operation safety of the unit are seriously influenced, after the blades are iced, the pneumatic performance is reduced, the power generation performance is reduced, and the service life loss of the wind generating set is increased due to unbalanced blade icing.

At present, the main deicing means are technologies such as electric heating deicing, gas heating deicing, hydrophobic material deicing and the like, and from the application condition of the current industry, the deicing and falling ice of the blade after being coated with ice seriously affect the safety of the equipment and the personal safety of operation and maintenance personnel, and the effect is limited.

Disclosure of Invention

In view of the above problems in the prior art, the embodiments of the present disclosure provide a method and an apparatus for controlling a wind turbine generator after icing, a wind turbine generator, and a storage medium, so as to solve the following problems in the prior art: after technologies such as electric heating deicing, gas heating deicing, hydrophobic material deicing and the like are adopted for deicing, the deicing and falling of ice after blade icing seriously affect the safety of equipment and the personal safety of operation and maintenance personnel, and meanwhile, a method for deicing the blades is provided, a reference is provided for recovering the safe operation of the wind generating set, and the operation risk of the operation and maintenance personnel is reduced.

In order to solve the above problems, the technical solution provided by the embodiments of the present disclosure is: a control method for a wind turbine generator after icing, the method comprising:

acquiring the running state parameters and the environmental meteorological parameters of the wind turbine generator;

detecting whether the icing grade of the blades of the wind turbine generator is greater than a first preset icing grade or not based on the operating state parameters and the environmental meteorological parameters;

under the condition that the icing grade is greater than the first preset icing grade, switching the running state of the wind turbine generator from the normal running state to a shutdown state;

converting the nose direction of the wind turbine generator from an upwind direction to a downwind direction, and switching the running state of the wind turbine generator from the shutdown state to a preset running state, wherein the first output power corresponding to the preset running state is smaller than the second output power corresponding to the normal running state;

and when the first output power meets a first preset condition, switching the running state of the wind turbine generator from the preset running state to the shutdown state so as to realize the vibration deicing function of the blades of the wind turbine generator.

Further, the operating state parameters of the wind turbine include at least: the current output power and wind speed of the wind turbine generator, and the environmental meteorological parameters at least comprise the temperature and humidity of the environment where the wind turbine generator is located;

the determining the icing grade of the wind turbine blade based on the operating state parameter and the environmental meteorological parameter comprises:

and under the conditions that 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, determining that the icing grade of the blades of the wind turbine generator exceeds a first preset icing grade.

Further, before the operating state of the wind turbine generator is switched from the shutdown state to the predetermined operating state, the method further includes:

judging whether the current temperature of the environment where the wind turbine generator is located is higher than a second preset temperature or not and whether the current illumination intensity of the environment where the wind turbine generator is located is greater than a preset illumination threshold or not;

and switching the running state of the wind turbine generator from the shutdown state to the preset running state under the conditions that the temperature is higher than the second preset temperature and the illumination intensity is greater than the preset illumination threshold value.

Further, after the operation state of the wind turbine generator is switched from the predetermined operation state to the shutdown state to realize the vibration deicing function of the blades of the wind turbine generator, the method includes:

and switching the running state of the wind turbine generator from the shutdown state to the normal running state under the condition that the icing grade is less than or equal to the first preset icing grade.

The embodiment of the present disclosure further provides a control device for a wind turbine generator after icing, the device includes:

the acquisition module is used for acquiring the running state parameters and the environmental meteorological parameters of the wind turbine generator;

the detection module is used for detecting whether the icing grade of the blades of the wind turbine generator is greater than a first preset icing grade or not based on the running state parameters and the environmental meteorological parameters;

the first switching module is used for switching the running state of the wind turbine generator from the normal running state to a shutdown state under the condition that the icing grade is greater than the first preset icing grade;

the second switching module is used for switching the head direction of the wind turbine generator from an upwind direction to a downwind direction and switching the running state of the wind turbine generator from the shutdown state to a preset running state, wherein the first output power corresponding to the preset running state is smaller than the second output power corresponding to the normal running state;

and the third switching module is used for switching the running state of the wind turbine generator from the preset running state to the shutdown state when the first output power meets a first preset condition so as to realize the vibration deicing function of the blades of the wind turbine generator.

the apparatus also includes a determination module;

the determining module is used for determining that the icing grade of the blades of the wind generation set exceeds the first preset icing grade under the conditions that 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 generation set is different from the second output power corresponding to the wind speed of the wind generation set.

Further, the second switching module is further configured to determine whether the current temperature of the environment where the wind turbine generator is located is higher than a second preset temperature, and whether the current illumination intensity of the environment where the wind turbine generator is located is greater than a preset illumination threshold;

Further, the apparatus further comprises a fourth switching module;

the fourth switching module is configured to switch the running state of the wind turbine generator from the shutdown state to the normal running state when the icing level is less than or equal to the first preset icing level.

The embodiment of the disclosure also provides a wind turbine generator, which comprises the control device for the wind turbine generator after icing.

The embodiment of the disclosure also provides a storage medium, which stores a computer program, and the computer program is executed by a processor to implement the steps of the control method for the wind turbine generator after icing.

The beneficial effects of this disclosed embodiment lie in: by the control method, the icing state of the wind turbine can be monitored, an active yaw downwind direction wind control strategy is executed, broken ice falls along the downwind direction after the icing melts due to the rise of the air temperature, the risk of smashing parts such as a hub cover, a flow guide cover and a box transformer substation can be effectively reduced, and the safe and reliable operation of the wind turbine is guaranteed.

Drawings

Fig. 1 is a schematic flow chart of a control method of a wind turbine generator set after icing according to a first embodiment of the disclosure;

fig. 2 is a schematic structural diagram of a control device of a wind turbine generator set after icing according to a second embodiment of the disclosure.

Detailed Description

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

It will be understood that various modifications may be made to the embodiments of the present application. Accordingly, the foregoing description should not be construed as limiting, but merely as exemplifications of embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the application.

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

These and other characteristics of the present application will become apparent from the following description of preferred forms of embodiment, given as non-limiting examples, with reference to the attached drawings.

It is also to be understood that although the present application has been described with reference to some specific examples, those skilled in the art are able to ascertain many other equivalents to the practice of the present application.

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.

Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the application, which can be embodied in various forms. Well-known and/or repeated functions and constructions are not described in detail to avoid obscuring the application of unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present application in virtually any appropriately detailed structure.

The specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the application.

The wind energy resource reserves in China are abundant, wind generating sets are widely installed in the regions of the three north and the south east, the coastal regions and the like, in recent years, icing disasters frequently occur due to the influence of extreme environmental conditions, the icing disasters frequently occur in the environments with high altitude, high humidity and low temperature, such as plateaus, ridges, tops of mountains and the like, and icing areas are mainly concentrated on the front edges of blades, so that the economic benefit of a wind power plant and the safe operation safety of the wind generating sets are seriously influenced. After the blades are covered with ice, the pneumatic performance is reduced, so that the power generation performance is reduced, the service life loss of the wind generating set is increased due to the unbalanced blade ice covering, and in addition, the ice melting and falling of the blades after the blades are covered with ice seriously affect the safety of the equipment and the personal safety of operation and maintenance personnel. The damage control of blade icing needs to consider the ice melting in the icing process and the ice removing after icing, the former needs to start from the angle of blade ice melting, consider electric heating ice removing, gas heating ice removing and hydrophobic material ice removing, and has limited effect from the application condition of the current industry.

In order to solve the technical problems, the embodiment of the disclosure provides a control method for a wind turbine generator after icing, which can solve the problem that the ice melting and ice falling of blades after icing seriously affect the safety of equipment and the personal safety of operation and maintenance personnel due to the fact that the ice melting and ice falling of the blades after icing are caused after the existing deicing technologies such as electrical heating deicing, gas heating deicing and hydrophobic material deicing are adopted, and meanwhile, the method for deicing the blades is provided, so that a reference is provided for recovering the safe operation of the wind turbine generator, and the problem of operation risk of the operation and maintenance personnel is reduced.

The first embodiment of the disclosure provides a control method for a wind turbine generator after icing, which can be applied to intelligent terminal equipment, various wind turbine generators and other equipment, can effectively deice blades of the wind turbine generator, and can also effectively prevent ice falling from affecting the wind turbine generator. Fig. 1 shows a schematic flow diagram of a control method of a wind turbine generator set after icing according to an embodiment of the present disclosure, which mainly includes steps S101 to S105:

s101, obtaining the running state parameters and the environmental meteorological parameters of the wind turbine generator.

In the embodiment of the disclosure, in the normal operation state of the wind turbine, the operation state parameters of the wind turbine at least include the output power of the wind turbine and the wind speed of the wind turbine.

The wind speed of the wind turbine mainly refers to the current wind speed of the wind turbine, and can be the wind speed measured by an engine room anemometer of the wind turbine.

The output power of the wind turbine refers to the current actual output power of the wind turbine, and the magnitude of the output power is related to the current wind speed of the wind turbine.

The environmental meteorological parameters at least comprise the temperature and the humidity of the environment where the wind turbine generator is located. During specific implementation, the temperature of the wind turbine is preferably the temperature near the hub center height of the wind turbine, the temperature of the environment around the wind turbine can also be selected, and the specific temperature can be detected according to actual conditions.

The humidity of the wind turbine generator is preferably the humidity near the hub center height of the wind turbine generator, and the humidity of the surrounding environment of the wind turbine generator can also be selected, and the specific humidity can be detected according to the actual situation.

S102, detecting whether the icing grade of the blades of the wind turbine generator is larger than a first preset icing grade or not based on the operation state parameters and the environmental meteorological parameters.

In the embodiment of the disclosure, the icing grade of the blades of the wind turbine generator represents the icing quantity on the blades of the wind turbine generator, and the higher the icing grade is, the larger the icing quantity on the blades is. For example, the ice coating rating may be on a scale of 1-10, with a larger number indicating a higher rating and a greater amount of ice coating on the blade.

The environment where the wind turbine generator is located is extremely complex and changeable, so that the self of the wind turbine generator and the environment where the wind turbine generator is located need to be judged before the icing level of the blades of the wind turbine generator is detected, and therefore under the conditions that the environment temperature where the wind turbine generator is located is lower than a first preset temperature, the humidity of the environment where the wind turbine generator is located is lower than a 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, the blades of the wind turbine generator can be determined to be in an icing state.

In the concrete implementation, although the wind turbine generator is already in the icing state, the icing degrees of the wind turbine generator in different environments are different, and not all the iced wind turbine generators need to be deiced, so in order to confirm that the current icing degree of the blades of the wind turbine generator can influence the operation of the wind turbine generator, whether the current icing degree of the wind turbine generator can influence the operation of the wind turbine generator needs to be further detected, we can determine whether the icing grade of the blades of the wind turbine generator is greater than a first preset icing grade based on the current output power and wind speed of the wind turbine generator and the temperature and humidity of the environment where the wind turbine generator is located, and when the icing grade of the blades of the wind turbine generator is greater than the first preset icing grade, the blades of the wind turbine generator need to be deiced, otherwise, the wind turbine generator can continue to operate.

The second output power corresponding to the wind speed of the wind turbine mainly refers to the corresponding ideal output power of the wind turbine at a certain wind speed. When the wind turbine generator runs at a certain wind speed, certain loss exists when the wind turbine generator generates electricity by utilizing wind due to environment, the wind turbine generator and human factors, so that the actual output power of the wind turbine generator is greatly different from the ideal power of the wind turbine generator.

In an embodiment, taking the temperature of the current environment of the wind turbine generator as-1 ℃, the humidity as 90%, and the actual output power (the current output power of the wind turbine generator) corresponding to the current wind speed a of the wind turbine generator as 1000w as an example, when the temperature of the environment of the wind turbine generator-1 ℃ is lower than the first preset temperature by 0 ℃, the humidity is higher than the preset humidity by 85%, and the second output power 1200w (ideal output power) corresponding to the current wind speed a of the wind turbine generator is different from the actual output power 1000w (the current output power of the wind turbine generator), we can determine that the icing level of the blade of the wind turbine generator is 5-level icing, and the icing level (5-level icing) of the wind turbine generator is greater than 3-level icing (the first preset icing level), representing the need for de-icing of the wind turbine.

In the embodiment of the disclosure, if the determined icing grade of the wind turbine generator is 2-grade icing, the 3-grade icing is less than 4-grade icing, so that the wind turbine generator needs to be deiced.

The icing grade can be divided by adopting 1-10 different grades, and the larger the number is, the larger the icing degree of the blades of the wind turbine generator is. English letters and special symbols can be used for representing the icing grade, and the icing grade can be set according to actual conditions.

In order to ensure that the icing grade obtained by using the operating state parameters subsequently is accurate, the parameters such as the rotating speed and the pitch angle of the blades of the wind turbine generator can be obtained, the icing grade of the wind turbine generator is determined in an auxiliary mode, and the obtained icing grade is more accurate.

S103, under the condition that the icing grade is larger than the first preset icing grade, the running state of the wind turbine generator is switched from the normal running state to the shutdown state.

In the embodiment of the disclosure, if the blades of the wind turbine are heavily iced during the normal operation of the wind turbine, the normal operation of the wind turbine is seriously affected, therefore, in order to ensure the safe and normal operation of the wind turbine, the wind turbine needs to be stopped, taking the ice coating grade classification of 1-10 as an example, if the ice coating grade obtained through the steps S101-S102 is grade 4 ice coating, if the grade is greater than the grade 3 icing set by people, people can confirm that the icing degree of the wind turbine generator can influence the operation of the wind turbine generator, the operation of the wind turbine generator needs to be stopped, and the wind turbine generator is switched to a stop state, the current icing degree of the wind turbine generator is represented without influencing the operation of the wind turbine generator, so that the deicing operation is not needed.

And S104, converting the nose direction of the wind turbine generator from an upwind direction to a downwind direction, and switching the running state of the wind turbine generator from a shutdown state to a preset running state.

In the embodiment of the disclosure, the upwind direction of the wind turbine mainly refers to the windward direction of the nose of the wind turbine, and the downwind direction of the wind turbine mainly refers to the leeward direction of the nose of the wind turbine.

In order to ensure that the consumption of electric energy is reduced in the deicing process, the first output power corresponding to the preset operation state is smaller than the second output power corresponding to the normal operation state. Preferably, the output power corresponding to the predetermined operation state is lower than or equal to 50% of the output power corresponding to the normal operation state, and the output power in the specific operation state can be set according to the actual situation.

During concrete implementation, before the running state of the wind turbine is switched to a preset running state from a shutdown state, in order to ensure the deicing safety of the wind turbine, the current environment of the wind turbine needs to be detected, and the concrete process is as follows:

and judging whether the current temperature of the environment where the wind turbine generator is located is higher than a second preset temperature or not and whether the current illumination intensity of the environment where the wind turbine generator is located is greater than a preset illumination threshold or not, and switching the running state of the wind turbine generator from the shutdown state to the preset running state under the conditions that the temperature is higher than the second preset temperature and the illumination intensity is greater than the preset illumination threshold.

For example, according to step 104, after the nose direction of the wind turbine generator is changed from the upwind direction to the downwind direction, it is detected that the current ambient temperature of the wind turbine generator to be deiced is 1 ℃ and the illumination intensity is 3, according to a preset deicing rule, the current ambient temperature of the wind turbine generator to be deiced is greater than 0 ℃ and the illumination intensity is greater than 2, and it is satisfied whether the current temperature of the environment where the wind turbine generator is located is higher than a second preset temperature and whether the current illumination intensity of the environment where the wind turbine generator is located is greater than a preset illumination threshold, so that the operating state of the wind turbine generator to be deiced can be switched from the shutdown state to the preset operating state.

And under the conditions that the current environment temperature of the wind turbine generator to be deiced is less than 0 ℃ or/and the illumination intensity of the current environment of the wind turbine generator to be deiced is 1, the wind turbine generator cannot be deiced. Through the detection of the current environment of the wind turbine generator, the wind turbine generator can be better ensured to be in a good deicing environment, and the safety of the deicing process of the wind turbine generator is also ensured.

And S105, when the first output power meets a first preset condition, switching the running state of the wind turbine generator from a preset running state to a shutdown state so as to realize the vibration deicing function of the blades of the wind turbine generator.

In the embodiment of the present disclosure, the first output power refers to an actual output power corresponding to a current wind speed of the wind turbine generator in a predetermined operation state.

During specific implementation, in order to ensure that the wind turbine does not waste electric energy in the deicing process, the wind turbine needs to be operated in a preset operation state, that is, the current output power of the wind turbine needs to be smaller than a preset power value, and the specific process is as follows:

when the wind turbine generator enters a preset operation state, the current output power of the wind turbine generator is controlled not to exceed the preset output power, the operation state of the wind turbine generator is switched to a shutdown state from the preset operation state after the condition is met, and in the shutdown process, as the wind turbine generator suddenly enters the shutdown state, the blades vibrate along the blades, the ice cover is broken and separated from the blades, and the deicing function is realized.

Due to the complexity of the environment of the wind turbine generator, in order to ensure that the wind turbine generator can generate enough vibration in the shutdown process, after the wind turbine generator enters a preset operation state, the current output power of the wind turbine generator is controlled not to exceed the preset output power, and the current output power of the wind turbine generator needs to be greater than the minimum output power.

In order to ensure the completion of the deicing operation of the blades of the wind turbine generator, if the current icing grade of the wind turbine generator is still larger than the first preset icing grade, the deicing operation of the wind turbine generator needs to be continued, and when the current icing grade of the wind turbine generator is smaller than or equal to the first preset icing grade, the running state of the wind turbine generator is switched from the shutdown state to the normal running state.

In some embodiments, because the environment of the wind turbine generator is complex, in order to ensure the safety of the deicing process, whether the wind turbine generator needs to be deiced can be determined manually, and the specific process is as follows:

the blade icing of the wind turbine generator is slowly and gradually increased, the wind power plant operation and maintenance personnel judge whether the deicing needs to be carried out according to the field condition, when the ambient temperature of the wind turbine generator is lower than a first preset temperature and the ambient illumination intensity is lower than a preset illumination threshold value, and when the loss of the generated energy is reduced, the wind power plant operation and maintenance personnel need to evaluate the safety distance of the blade deicing and keep away from the observation. Specifically, the wind turbine generator is started (the running state of the wind turbine generator is switched to a preset running state from a shutdown state) under the condition that the wind speed of the environment where the wind turbine generator is located is smaller than a preset wind speed, the output power of the wind turbine generator is controlled not to exceed 50% of the ideal power, the wind turbine generator is normally shut down, the blades are covered with ice and thrown out under the action of centrifugal force in the starting process, the blades are vibrated along the blades after the blades are normally shut down, and the covered ice is separated from the blades after being vibrated and broken. And determining the number of start-stop cycles by operation and maintenance personnel in the wind power plant according to the icing degree and the deicing effect so as to finish the blade deicing.

The second embodiment of the disclosure provides a control device for a wind turbine generator set after icing.

Fig. 2 is a schematic diagram of a control device of a wind turbine generator set after icing according to an embodiment of the disclosure.

As shown in fig. 2, the control device for the wind turbine generator after icing includes:

the acquiring module 201 is used for acquiring running state parameters and environmental meteorological parameters of the wind turbine generator; the detection module 202 is used for detecting whether the icing grade of the blades of the wind turbine generator is greater than a first preset icing grade or not based on the operation state parameters and the environmental meteorological parameters; the first switching module 203 is used for switching the running state of the wind turbine generator from a normal running state to a shutdown state under the condition that the icing grade is greater than a first preset icing grade; the second switching module 204 is configured to change the nose direction of the wind turbine from an upwind direction to a downwind direction, and switch the operating state of the wind turbine from a shutdown state to a predetermined operating state, where a first output power corresponding to the predetermined operating state is smaller than a second output power corresponding to a normal operating state; and the third switching module 105 is configured to switch the operation state of the wind turbine generator from a predetermined operation state to a shutdown state when the first output power meets a first preset condition, so as to implement a vibration deicing function of the blades of the wind turbine generator.

In the embodiment of the present disclosure, in a normal operation state of the wind turbine, the obtaining module 201 obtains the operation state parameters of the wind turbine, which at least include the output power of the wind turbine and the wind speed of the wind turbine.

The environmental meteorological parameters at least comprise the temperature and the humidity of the environment where the wind turbine generator is located. In a specific implementation, the temperature of the wind turbine is preferably the temperature near the hub center height of the wind turbine, and the temperature of the environment around the wind turbine may also be selected and may be measured by a thermometer. The specific temperature can be detected according to actual conditions.

During specific implementation, the control device for the wind turbine generator after icing further comprises a determining module, and the determining module is used for determining that the icing grade of the blades of the wind turbine generator exceeds a first preset icing grade under the conditions that 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.

In the embodiment of the disclosure, the icing grade of the wind turbine blade represents the icing amount on the wind turbine blade, and the higher the icing grade is, the larger the icing amount on the blade is represented. For example, the icing grade may be on a scale of 1-10, with larger numbers representing higher grades with greater amounts of ice on the blade.

In an embodiment, taking the temperature of the current environment of the wind turbine generator as-1 ℃, the humidity as 90%, and the actual output power (the current output power of the wind turbine generator) corresponding to the current wind speed a of the wind turbine generator as 1000w as an example, when the temperature of the environment of the wind turbine generator-1 ℃ is lower than the first preset temperature by 0 ℃, the humidity by 90% is higher than the preset humidity by 85%, and the second output power 1200w (ideal output power) corresponding to the current wind speed a of the wind turbine generator is different from the actual output power 1000w (the current output power of the wind turbine generator), we can determine that the blade of the wind turbine generator is already covered with ice, so we can determine that the ice covering level of the blade covered with ice on the wind turbine generator is 5-level ice according to the current actual output power, the wind speed of the wind turbine generator, and the temperature and the humidity of the environment of the wind turbine generator-level ice covering (5-level ice covering) of the wind turbine generator is greater than 3-level ice covering (the first preset ice covering level), representing the need for de-icing of the wind turbine.

In order to ensure that the icing grade obtained by using the operating state parameters subsequently is accurate, the obtaining module 201 may further obtain parameters such as the rotating speed and the pitch angle of the blades of the wind turbine generator, assist in determining the icing grade of the wind turbine generator, and ensure that the obtained icing grade is more accurate.

During specific implementation, the second switching module 204 is further configured to determine whether the current temperature of the environment where the wind turbine generator is located is higher than a second preset temperature, and whether the current illumination intensity of the environment where the wind turbine generator is located is greater than a preset illumination threshold, and switch the running state of the wind turbine generator from the shutdown state to a predetermined running state under the condition that the temperature is higher than the second preset temperature and the illumination intensity is greater than the preset illumination threshold.

In the implementation of the present disclosure, 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 deicing of the wind turbine, the current environment of the wind turbine needs to be detected, and the specific process is as follows:

During specific implementation, the control device for the wind turbine generator after icing further comprises a fourth switching module, and the fourth switching module is used for switching the running state of the wind turbine generator from a shutdown state to a normal running state under the condition that the icing grade is less than or equal to the first preset icing grade.

In the embodiment of the disclosure, in the normal operation of the wind turbine generator, if the blades of the wind turbine generator are heavily coated with ice, the normal operation of the wind turbine generator is seriously affected, so in order to ensure the safety and the normal operation of the wind turbine generator, the wind turbine generator needs to be stopped to operate, the operation of the wind turbine generator needs to be stopped according to the ice coating level of 1-10 as an example, if the obtained ice coating level is 4-level ice coating, and the level is greater than 3-level ice coating set by people, people can confirm that the ice coating level of the wind turbine generator can affect the operation of the wind turbine generator, and switch to a stop state, and if the determined ice coating level of the wind turbine generator is less than a first preset ice coating level, the current ice coating level of the wind turbine generator does not affect the operation of the wind turbine generator, so that the deicing operation is not needed.

By the control method, the icing state of the wind turbine can be monitored, an active yawing downwind direction wind-to-wind control strategy is executed, and crushed ice falls along the downwind direction after the icing melts due to the rise of the air temperature, so that the risk of smashing parts such as a hub cover, a flow guide cover and a box transformer substation is effectively reduced, and the safe and reliable operation of the wind turbine is ensured.

A third embodiment of the present disclosure provides a wind turbine generator, which at least includes a control device after any one of the wind turbine generators is covered with ice in the second aspect, as shown in fig. 2, the control device after the wind turbine generator is covered with ice includes:

the acquiring module 201 is used for acquiring the operating state parameters and the environmental meteorological parameters of the wind turbine generator; the detection module 202 is used for detecting whether the icing grade of the blades of the wind turbine generator is greater than a first preset icing grade or not based on the operation state parameters and the environmental meteorological parameters; the first switching module 203 is used for switching the running state of the wind turbine generator from a normal running state to a shutdown state under the condition that the icing grade is greater than a first preset icing grade; the second switching module 204 is configured to change the nose direction of the wind turbine from an upwind direction to a downwind direction, and switch the operating state of the wind turbine from a shutdown state to a predetermined operating state, where a first output power corresponding to the predetermined operating state is smaller than a second output power corresponding to a normal operating state; the third switching module 205 is configured to switch the operation state of the wind turbine generator from a predetermined operation state to a shutdown state when the first output power meets the first preset condition, so as to implement a vibration deicing function of the blades of the wind turbine generator.

In the embodiment of the disclosure, the icing grade of the wind turbine blade represents the icing amount on the wind turbine blade, and the higher the icing grade is, the larger the icing amount on the blade is represented. For example, the ice coating rating may be on a scale of 1-10, with a larger number indicating a higher rating and a greater amount of ice coating on the blade.

and judging whether the current temperature of the environment where the wind turbine generator is located is higher than a second preset temperature or not and whether the current illumination intensity of the environment where the wind turbine generator is located is higher than a preset illumination threshold or not, and switching the running state of the wind turbine generator from a shutdown state to a preset running state under the conditions that the temperature is higher than the second preset temperature and the illumination intensity is higher than the preset illumination threshold.

The method comprises the following steps that under the condition that the current environment temperature of the wind turbine generator to be deiced is less than 0 ℃ or/and the illumination intensity of the current environment of the wind turbine generator to be deiced is 1, the wind turbine generator cannot be deiced. Through the detection of the current environment of the wind turbine generator, the wind turbine generator can be better ensured to be in a good deicing environment, and the safety of the deicing process of the wind turbine generator is also ensured.

A fourth embodiment of the present disclosure provides a storage medium, which is specifically a computer-readable medium, storing a computer program, which when executed by a processor implements the method provided in any embodiment of the present disclosure, including the following steps S31 to S35:

and S31, acquiring the running state parameters and the environmental meteorological parameters of the wind turbine generator.

And S32, detecting whether the icing grade of the blades of the wind turbine generator is greater than a first preset icing grade or not based on the running state parameters and the environmental meteorological parameters.

And S33, switching the running state of the wind turbine generator from the normal running state to the shutdown state under the condition that the icing grade is greater than the first preset icing grade.

And S34, converting the head direction of the wind turbine generator from an upwind direction to a downwind direction, and switching the running state of the wind turbine generator from a shutdown state to a preset running state, wherein the first output power corresponding to the preset running state is smaller than the second output power corresponding to the normal running state.

S35, when the first output power meets a first preset condition, the operation state of the wind turbine generator is switched to a stop state from a preset operation state, and therefore the vibration deicing function of the blades of the wind turbine generator is achieved.

The computer program is executed by the processor, and based on the running state parameters and the environmental meteorological parameters, when whether the icing grade of the blades of the wind turbine generator is greater than a first preset icing grade is detected, the following steps are specifically executed by the processor:

Before the computer program is executed by the processor to switch the running state of the wind generating set from the shutdown state to the preset running state, the following steps are also executed by the processor:

judging whether the current temperature of the environment where the wind turbine generator is located is higher than a second preset temperature or not and whether the current illumination intensity of the environment where the wind turbine generator is located is larger than a preset illumination threshold or not;

and switching the running state of the wind turbine generator from the shutdown state to a preset running state under the conditions that the temperature is higher than a second preset temperature and the illumination intensity is greater than a preset illumination threshold value.

The computer program is executed by the processor to switch the running state of the wind turbine generator from a preset running state to a shutdown state so as to realize the vibration deicing function of the blades of the wind turbine generator, and the following steps are specifically executed by the processor:

and switching the running state of the wind turbine generator from a shutdown state to a normal running state under the condition that the icing grade is less than or equal to a first preset icing grade.

By the control method, the icing state of the wind turbine can be monitored, an active yaw downwind direction wind control strategy is executed, broken ice falls along the downwind direction after the icing melts due to the rise of the air temperature, the risk of smashing parts such as a hub cover, a flow guide cover and a box transformer substation can be effectively reduced, and the safe and reliable operation of the wind turbine is guaranteed.

The device provided by the embodiment of the present disclosure can execute the processes and steps of the method embodiments, and also has functional modules corresponding to the method embodiments, which can execute corresponding operations, and have corresponding technical effects, and are not described herein again to avoid repetition.

The above embodiments are merely exemplary embodiments of the present disclosure, which is not intended to limit the present disclosure, and the scope of the present disclosure is defined by the claims. Various modifications and equivalents of the disclosure may occur to those skilled in the art within the spirit and scope of the disclosure, and such modifications and equivalents are considered to be within the scope of the disclosure.

Claims

1. A control method for a wind turbine generator after icing is characterized by comprising the following steps:

changing the nose direction of the wind turbine generator from an upwind direction to a downwind direction, and switching the running state of the wind turbine generator from the shutdown state to a preset running state, wherein the first output power corresponding to the preset running state is smaller than the second output power corresponding to the normal running state;

2. The method for controlling the wind turbine generator set after icing according to claim 1, wherein the operating state parameters of the wind turbine generator set at least comprise: the current output power and wind speed of the wind turbine generator, and the environmental meteorological parameters at least comprise the temperature and humidity of the environment where the wind turbine generator is located;

based on the operating state parameter and the environmental meteorological parameter, whether the icing grade of the wind turbine generator blade is greater than a first preset icing grade is detected, and the method comprises the following steps:

3. The method for controlling the wind turbine generator set after icing according to claim 1, wherein before the operation state of the wind turbine generator set is switched from a shutdown state to a preset operation state, the method further comprises:

4. The method for controlling the wind turbine generator set after the ice coating according to any one of claims 1 to 3, wherein the switching the operation state of the wind turbine generator set from the predetermined operation state to the shutdown state to realize the vibration deicing function of the blades of the wind turbine generator set comprises:

5. A control device of a wind turbine generator set after ice coating is characterized by comprising:

6. The control device of claim 5, wherein the operating state parameters of the wind turbine generator at least comprise: the current output power and wind speed of the wind turbine generator, and the environmental meteorological parameters at least comprise the temperature and humidity of the environment where the wind turbine generator is located;

the apparatus also includes a determination module;

7. The control device of the wind turbine generator set after icing according to claim 5, wherein the second switching module is further configured to determine whether a current temperature of an environment where the wind turbine generator set is located is higher than a second preset temperature, and whether a current illumination intensity of the environment where the wind turbine generator set is located is greater than a preset illumination threshold;

8. The control method of the wind turbine generator set after icing according to any one of claims 5 to 7, characterized in that the device further comprises a fourth switching module;

9. A wind turbine generator, comprising: control device of a wind turbine generator set after icing according to any of claims 5 to 8.

10. A storage medium storing a computer program, characterized in that the computer program, when executed by a processor, implements the steps of the method for controlling a wind turbine generator set after icing according to any one of claims 1 to 4.