CN106644372A - Method and device for detecting fluid pneumatic data of wind turbine generator - Google Patents

Abstract

A method and apparatus for detecting hydropneumatic data of a wind turbine are provided. The method comprises the following steps: predetermining a relationship between wind speed of at least one altitude of at least one wind measuring area preset around a predetermined wind turbine and fluid aerodynamic data at the predetermined wind turbine; detecting a wind speed at a predetermined altitude of a predetermined wind sensing area of the at least one wind sensing area; determining fluid aerodynamic data at the predetermined wind turbine corresponding to the detected wind speed according to a predetermined relationship. According to the method and the device, the fluid pneumatic data at the wind turbine can be determined before the incoming flow reaches the wind turbine, so that the influence of the incoming flow on the wind turbine can be known in advance.

Description

Method and device for detecting fluid aerodynamic data of a wind turbine

technical field

The invention relates to the field of wind power generation. More specifically, it relates to a method and device for detecting fluid aerodynamic data of a wind turbine.

Background technique

As a clean and renewable energy, wind energy has been paid more and more attention, and the installed capacity of wind turbines is also increasing.

The fluid aerodynamic data at the wind turbine plays a very important role in the control and various monitoring of the wind turbine. However, at present, when detecting the fluid aerodynamic data at the wind turbine, it is necessary to install sensors at the positions to be detected, resulting in high cost. In addition, it is also difficult to know the fluid aerodynamic data of each position of the wind turbine in such a way.

Contents of the invention

The object of the present invention is to provide a method and device for detecting fluid aerodynamic data of a wind turbine.

According to an aspect of the present invention, there is provided a method for detecting fluid aerodynamic data of a wind turbine, the method comprising: predetermining the wind speed at least one altitude of at least one wind measurement area preset around the predetermined wind turbine and the wind speed at the predetermined wind turbine the relationship between the fluid aerodynamic data at the predetermined wind turbine; detect the wind speed at the predetermined altitude of the predetermined wind measurement area in the at least one wind measurement area; The fluid aerodynamic data at the predetermined wind turbine.

Optionally, the relationship is a predetermined database, the predetermined database stores a plurality of wind speeds at at least one altitude at the at least one wind measuring area, and a wind speed corresponding to each wind speed at each wind measuring area at Fluid aerodynamic data at the predetermined wind turbine.

Optionally, the fluid aerodynamic data at the predetermined wind turbine unit corresponding to any wind speed at any altitude at any wind measuring area is obtained by obtaining the wind speed at any wind measuring area and the function of altitude; using the obtained function as the inlet boundary condition, establishing a large eddy simulation model; using the established large eddy simulation model to determine fluid aerodynamic data corresponding to any wind speed at the predetermined wind turbine.

Optionally, the function is one of the following functions: a relationship function between wind speed and altitude, a relationship function between wind speed, wind friction speed, and altitude, and a relationship between wind speed, altitude, and atmospheric thermal stability. relationship function.

Optionally, the step of establishing a large eddy simulation model includes: establishing a three-dimensional model of the terrain within a predetermined range including the predetermined wind turbine and the predetermined wind measurement area; performing grid division on the established three-dimensional model; setting an inlet boundary Conditions and turbulence model; use the meshed 3D model and the set inlet boundary conditions and turbulence model to establish a large eddy simulation model.

Optionally, when performing grid division on the established 3D model, the more rugged the actual geographic location, the denser the grid.

Optionally, the step of establishing the large eddy simulation model also includes: setting the wall function, using the three-dimensional model after meshing and the set inlet boundary condition and turbulence model to establish the large eddy simulation model. The 3D model and the set inlet boundary conditions, turbulence model and wall function are used to establish the large eddy simulation model. The wall function is as follows:

U=U _f ×K×ln((z+z ₀ )/z ₀ ),

Among them, U is the average wind speed, U _f is the friction speed of the wind, K is the Karman constant, z ₀ is the length of the surface roughness, and z is the vertical coordinate.

Optionally, the step of using the established large eddy simulation model to determine the fluid aerodynamic data corresponding to the arbitrary wind speed at the predetermined wind turbine includes:

According to the coordinates of the predetermined position on the predetermined wind turbine, the fluid aerodynamic data corresponding to the arbitrary wind speed at the predetermined position is determined through the established large eddy simulation model.

Optionally, the fluid aerodynamic data includes at least one of wind speed, turbulence intensity and inflow angle.

Optionally, according to the coordinates of a predetermined position on the predetermined wind turbine, the step of determining the fluid aerodynamic data corresponding to any wind speed at the predetermined position through the established large eddy simulation model includes: according to the The coordinates of a predetermined position on the wind turbine are predetermined, and the wind speed and/or turbulence intensity at the predetermined position corresponding to any wind speed is determined through the established large eddy simulation model.

Optionally, according to the coordinates of the predetermined position on the predetermined wind turbine, the step of determining the fluid aerodynamic data at the predetermined position corresponding to the arbitrary wind speed through the established large eddy simulation model further includes: according to the determined The wind speed in the fluid aerodynamic data determines the inflow angle.

Optionally, when using the established large eddy simulation model to determine the fluid aerodynamic data at the predetermined wind turbine corresponding to the arbitrary wind speed, the arbitrary altitude and the arbitrary wind speed are used as the large eddy Initial boundary conditions for the simulation model.

Optionally, the predetermined wind measuring area is on the windward side of the predetermined wind turbine.

Optionally, the predetermined wind measurement area is located in front of the predetermined wind turbine.

Optionally, when there is an object around the wind turbine that affects the incoming flow of the predetermined wind turbine, a wind measurement area is set upwind of the object.

Another aspect of the present invention provides a device for detecting fluid aerodynamic data of a wind turbine, the device comprising: a pre-detection unit, which predetermines the wind speed of at least one altitude in at least one wind measurement area preset around a predetermined wind turbine and the relationship between the fluid aerodynamic data at the predetermined wind turbine; the wind speed detection unit detects the wind speed at a predetermined altitude in the predetermined wind measurement area in the at least one wind measurement area; the fluid aerodynamic data detection unit detects the wind speed according to the predetermined The determined relationship is used to determine fluid aerodynamic data corresponding to the detected wind speed at the predetermined wind turbine.

Optionally, the relationship is a predetermined database, the predetermined database stores a plurality of wind speeds at at least one altitude at the at least one wind measuring area, and a wind speed corresponding to each wind speed at each wind measuring area at Fluid aerodynamic data at the predetermined wind turbine.

Optionally, the pre-detection unit obtains the fluid aerodynamic data at the predetermined wind turbine corresponding to any wind speed at any altitude at any wind measurement area in the following manner: acquiring function of wind speed and altitude; use the obtained function as the inlet boundary condition, establish a large eddy simulation model; use the established large eddy simulation model to determine the fluid aerodynamic force at the predetermined wind turbine corresponding to any wind speed data.

Optionally, the function is one of the following functions: a relationship function between wind speed and altitude, a relationship function between wind speed, wind friction speed, and altitude, and a relationship between wind speed, altitude, and atmospheric thermal stability. relationship function.

Optionally, the pre-detection unit establishes a large eddy simulation model in the following manner: establishes a three-dimensional model of the terrain within a predetermined range including the predetermined wind turbine and the predetermined wind measurement area; performs grid division on the established three-dimensional model; Set the inlet boundary conditions and turbulence model; use the meshed 3D model and the set inlet boundary conditions and turbulence model to establish a large eddy simulation model.

Optionally, when the pre-detection unit performs grid division on the established three-dimensional model, the more rugged the actual geographical location, the denser the grid.

Optionally, the pre-detection unit also sets the wall function, and the pre-detection unit uses the 3D model after meshing and the set inlet boundary conditions, turbulence model and wall function to establish a large eddy simulation model,

The wall function is as follows:

U=U _f ×K×ln((z+z ₀ )/z ₀ ),

Among them, U is the average wind speed, U _f is the friction speed of the wind, K is the Karman constant, z ₀ is the length of the surface roughness, and z is the vertical coordinate.

Optionally, the pre-detection unit determines fluid aerodynamic data corresponding to any wind speed at the predetermined position through the established large eddy simulation model according to the coordinates of the predetermined position on the predetermined wind turbine.

Optionally, the fluid aerodynamic data includes at least one of wind speed, turbulence intensity and inflow angle.

Optionally, the pre-detection unit determines the wind speed and/or turbulence intensity corresponding to any wind speed at the predetermined position through the established large eddy simulation model according to the coordinates of the predetermined position on the predetermined wind turbine.

Optionally, the pre-detection unit determines the inflow angle according to the determined wind speed in the fluid aerodynamic data.

Optionally, when using the established large eddy simulation model to determine the fluid aerodynamic data at the predetermined wind turbine corresponding to the arbitrary wind speed, the arbitrary altitude and the arbitrary wind speed are used as the large eddy Initial boundary conditions for the simulation model.

Optionally, the predetermined wind measuring area is on the windward side of the predetermined wind turbine.

Optionally, the predetermined wind measurement area is located in front of the predetermined wind turbine.

Optionally, when there is an object around the wind turbine that affects the incoming flow of the predetermined wind turbine, there is a wind measurement area set upwind of the object in the at least one wind measurement area.

According to the method and device for detecting fluid aerodynamic data of a wind turbine of the present invention, the fluid aerodynamic data at the wind turbine can be determined before the incoming flow reaches the wind turbine, so that the impact of the incoming flow on the wind turbine can be known in advance. In addition, according to the method and device for detecting fluid aerodynamic data of a wind turbine of the present invention, without installing a sensor specially used for detecting fluid aerodynamic data on the wind turbine, the desired position on the wind turbine can be obtained as required Fluid aerodynamic data, and finer-grained fluid aerodynamic data can be obtained, so that fluid aerodynamic data of more locations can be obtained at a lower cost.

Description of drawings

The above-mentioned and other objects, features and advantages of the present invention will become more clear through the following detailed description in conjunction with the accompanying drawings, wherein:

FIG. 1 shows a flowchart of a method for detecting fluid aerodynamic data of a wind turbine according to an embodiment of the present invention;

Fig. 2 shows a flow chart of obtaining fluid aerodynamic data at the predetermined wind turbine corresponding to any wind speed at any altitude at any wind measurement area according to an embodiment of the present invention;

Fig. 3 shows a flow chart of establishing a large eddy simulation model according to an embodiment of the present invention;

Fig. 4 shows a block diagram of a device for detecting fluid aerodynamic data of a wind turbine according to an embodiment of the present invention.

detailed description

Various example embodiments will now be described more fully with reference to the accompanying drawings.

In the method for detecting fluid aerodynamic data of a wind turbine of the present invention, a wind measurement area is set around the wind turbine, and the fluid aerodynamic data at a predetermined wind turbine is determined by wind data in the wind measurement area. In this way, the fluid aerodynamic data at the predetermined wind turbine can be determined before the incoming flow reaches the wind turbine.

Fig. 1 shows a flowchart of a method for detecting fluid aerodynamic data of a wind turbine according to an embodiment of the present invention.

Referring to FIG. 1 , in step S110 , the relationship between the wind speed at at least one altitude in at least one preset wind measuring area around the predetermined wind turbine and the fluid aerodynamic data at the predetermined wind turbine is determined in advance. It should be understood that the wind speed here is a vector, including the magnitude and direction of the wind speed.

In this embodiment, at least one wind measurement area is preset around the predetermined wind turbine. Preferably, when there is an object around the predetermined wind turbine that affects the incoming flow of the predetermined wind turbine, a wind measurement area is set upwind of the object (that is, the object is located between the wind measurement area and the predetermined wind turbine). ). The objects affected by the incoming flow may be, for example, obstacles (eg, mountains, woods), pits (eg, canyons, lakes, rivers, etc.), and other topographic features that affect the incoming flow.

In one embodiment, a wind measuring area may be set at every predetermined angle around the predetermined wind turbine.

The relationship may be represented by a predetermined database. The predetermined database stores a plurality of wind speeds at at least one altitude at the at least one wind measuring area, and fluid aerodynamic data at the predetermined wind turbines corresponding to each wind speed at each wind measuring area. In other words, the predetermined database stores fluid aerodynamic data at the predetermined wind turbines corresponding to altitudes and wind speeds at different wind measurement areas. In this case, when a certain altitude and a certain wind speed of a certain wind measuring area are obtained, the corresponding fluid aerodynamic data at the predetermined wind turbine can be found from the predetermined database. The predetermined database can be established by using a large eddy simulation model, and the process of obtaining data in the predetermined database will be described in detail later.

In step S120, a wind speed at a predetermined altitude of a predetermined wind measurement area in the at least one wind measurement area is detected. Here, the predetermined altitude is one of the at least one altitude. It should be understood that the wind speed here is a vector, including the magnitude and direction of the wind speed.

The above wind speed can be detected in various ways. For example, an anemometer can be set in the predetermined wind measurement area to detect the wind speed at a predetermined altitude, and a wind turbine can be installed on the wind turbine to detect the wind speed at a predetermined altitude in the predetermined wind measurement area.

Preferably, the predetermined wind measurement area is the wind measurement area on the windward side of the predetermined wind turbine in the at least one wind measurement area. It should be understood that the upwind side here refers to the side of the incoming flow that is perpendicular to the current wind direction and passes through the straight line of the predetermined wind group. More preferably, the predetermined wind measurement area is a wind measurement area in front of the predetermined wind turbine (that is, the direction the blades are currently facing).

In step S130, fluid aerodynamic data corresponding to the detected wind speed at the predetermined wind turbine is determined according to a predetermined relationship.

In the case where the relationship is represented by a predetermined database, since the predetermined database stores a plurality of wind speeds at the predetermined altitude in the predetermined wind measurement area, corresponding to each wind speed at each wind measurement area The aerodynamic data of the fluid at the predetermined wind turbine, so the fluid aerodynamic data corresponding to the detected wind speed at the predetermined wind turbine is extracted from the predetermined database.

The predetermined wind measurement area is one or more wind measurement areas in the at least one wind measurement area. When the predetermined wind measuring area is a plurality of wind measuring areas, the fluid aerodynamic data corresponding to the wind speed detected in each wind measuring area may be extracted from the predetermined database at the predetermined wind turbine, and then the extracted The average or maximum value of the fluid aerodynamic data or the result after other processing is taken as the final result.

The process of obtaining fluid aerodynamic data at the predetermined wind turbine at different wind speeds at different altitudes at different wind measurement areas in the predetermined database will be described in detail below.

Different wind speeds at at least one altitude and fluid aerodynamic data corresponding to the different wind speeds at the predetermined wind turbines need to be obtained in advance for each wind measuring area.

For any wind measuring area, it is necessary to establish a corresponding large eddy simulation model to obtain different wind speeds at at least one altitude in any wind measuring area and the fluid aerodynamics at the predetermined wind turbines corresponding to different wind speeds data.

The process of obtaining fluid aerodynamic data corresponding to any wind speed at any altitude and any altitude at any wind measurement area will be described below with reference to FIG. 2 and FIG. 3 .

Fig. 2 shows a flow chart of obtaining fluid aerodynamic data at the predetermined wind power unit corresponding to any wind speed at any altitude at any wind measurement area according to an embodiment of the present invention.

In step S210, a function related to wind speed and altitude at any wind measurement area is obtained. In other words, it is necessary to obtain the influence of the geographical conditions at any wind measurement area on the wind speed at different altitudes.

The function about wind speed and altitude can be one of the following functions: the relationship function between wind speed and altitude, the relationship function between wind speed, wind friction speed, and altitude, and the relationship between wind speed, altitude, and atmospheric thermal stability. relationship between functions.

In step S220, a large eddy simulation model is established with the obtained function as an inlet boundary condition.

The following describes the process of establishing a large eddy simulation model with reference to FIG. 3 . Fig. 3 shows a flow chart of establishing a large eddy simulation model according to an embodiment of the present invention.

As shown in FIG. 3 , in step S310 , a three-dimensional model is established for the terrain within a predetermined range including the predetermined wind turbine and the predetermined wind measurement area. That is to say, the three-dimensional shape of the terrain within the predetermined range is converted into data for subsequent modeling.

In step S320, the established three-dimensional model is meshed. In a preferred embodiment, further considering the ruggedness of the actual terrain, when the established 3D model is divided into grids, the more rugged the actual geographical location, the denser the grid.

In step S330, the inlet boundary condition and the turbulence model are set. Here, the inlet boundary condition is a function determined in step S210. Compared with using the relationship function between wind speed and altitude as the inlet boundary condition, using the relationship function between wind speed, wind friction speed and altitude as the inlet boundary condition further considers the influence of surface roughness, and the final fluid Aerodynamic data will be more accurate. Compared with using the relationship function between wind speed, wind friction speed and altitude as the inlet boundary condition, using the relationship function between wind speed, altitude and atmospheric thermal stability as the inlet boundary condition can be used in different airflow environments Get more reliable fluid aerodynamic data. The turbulence model may use various turbulence models (for example, sub-grid models) for performing large eddy simulations, and the present invention is not limited thereto.

In step S340, a large eddy simulation model is established by using the meshed three-dimensional model and the set inlet boundary conditions and turbulence model.

In a preferred embodiment, when establishing the large eddy simulation model, further consideration may be given to setting a wall function, so as to more accurately model some complex terrains (eg, mountainous areas). The wall function is shown in the following formula (1):

U＝U _f ×K×ln((z+z ₀ )/z ₀ ) (1)

Among them, U is the average wind speed, U _f is the friction speed of the wind, K is the Karman constant, z ₀ is the length of the surface roughness, and z is the vertical coordinate.

In step S230, the established large eddy simulation model is used to determine fluid aerodynamic data corresponding to the arbitrary wind speed at the predetermined wind turbine.

When using the established large eddy simulation model to determine the fluid aerodynamic data at the predetermined wind turbine corresponding to the arbitrary wind speed, the arbitrary altitude and the arbitrary wind speed are used as the initial stage of the large eddy simulation model Boundary conditions. After the initial boundary conditions are set for the large eddy simulation model, the fluid aerodynamic data at the measuring point can be obtained according to the coordinates of the measuring point.

In this case, fluid aerodynamic data at the predetermined position corresponding to any wind speed may be determined through the established large eddy simulation model according to the coordinates of the predetermined position on the predetermined wind turbine. For example, the predetermined position may be at least one position on the blade and/or the tower. It should be understood that the predetermined position is not limited thereto, and may be any position on the wind turbine where it is desired to obtain fluid aerodynamic data.

The wind speed and/or turbulence intensity at the predetermined position can be obtained directly through a large eddy simulation model. In addition, the inflow angle at the predetermined position can be further determined according to the wind speed in the obtained fluid aerodynamic data.

A device for detecting fluid aerodynamic data of a wind turbine according to an embodiment of the present invention will be described below with reference to FIG. 4 . Fig. 4 shows a block diagram of a device for detecting fluid aerodynamic data of a wind turbine according to an embodiment of the present invention.

Referring to FIG. 4 , a device 400 for detecting fluid aerodynamic data of a wind turbine according to an embodiment of the present invention includes a pre-detection unit 410 , a wind speed detection unit 420 , and a fluid aerodynamic data detection unit 430 .

The pre-detection unit 410 predetermines the relationship between the wind speed at at least one altitude in at least one preset wind measuring area around the predetermined wind turbine and the fluid aerodynamic data at the predetermined wind turbine. It should be understood that the wind speed here includes the magnitude and direction of the wind speed.

In this embodiment, at least one wind measurement area is preset around the predetermined wind turbine. Preferably, when there is an object around the predetermined wind turbine that affects the incoming flow of the predetermined wind turbine, a wind measurement area is set upwind of the object (that is, the object is located between the wind measurement area and the predetermined wind turbine). ). The objects affected by the incoming flow may be, for example, obstacles (eg, mountains, woods), pits (eg, canyons, lakes, rivers, etc.), and other topographic features that affect the incoming flow.

In one embodiment, a wind measuring area may be set at every predetermined angle around the predetermined wind turbine.

The relationship may be represented by a predetermined database. The predetermined database stores a plurality of wind speeds at at least one altitude at the at least one wind measuring area, and fluid aerodynamic data at the predetermined wind turbines corresponding to each wind speed at each wind measuring area. In other words, the predetermined database stores fluid aerodynamic data at the predetermined wind turbines corresponding to altitudes and wind speeds at different wind measurement areas. In this case, when a certain altitude and a certain wind speed of a certain wind measuring area are obtained, the corresponding fluid aerodynamic data at the predetermined wind turbine can be found from the predetermined database. The predetermined database can be established by using a large eddy simulation model, and the process of obtaining data in the predetermined database will be described in detail later.

The wind speed detection unit 420 detects a wind speed at a predetermined altitude of a predetermined wind measurement area in the at least one wind measurement area. Here, the predetermined altitude is one of the at least one altitude. It should be understood that the wind speed here includes the magnitude and direction of the wind speed.

The wind speed detection unit 420 may detect the above wind speed in various ways. For example, the wind speed detection unit 420 can detect the wind speed at a predetermined altitude by installing an anemometer in the predetermined wind measurement area, and detect the wind speed at a predetermined altitude in the predetermined wind measurement area by installing a laser wind radar on the wind turbine.

Preferably, the predetermined wind measuring area is on the windward side of the predetermined wind turbine. It should be understood that the upwind side here refers to the side of the incoming flow that is perpendicular to the current wind direction and passes through the straight line of the predetermined wind group. More preferably, the predetermined wind measurement area is a wind measurement area in front of the predetermined wind turbine (that is, the direction the blades are currently facing).

The fluid aerodynamic data detecting unit 430 determines fluid aerodynamic data corresponding to the detected wind speed at the predetermined wind turbine according to a predetermined relationship.

In the case where the relationship is represented by a predetermined database, since the predetermined database stores a plurality of wind speeds at the predetermined altitude in the predetermined wind measurement area, corresponding to each wind speed at each wind measurement area Therefore, the fluid aerodynamic data detection unit 430 extracts the fluid aerodynamic data corresponding to the detected wind speed at the predetermined wind turbine from the predetermined database.

The predetermined wind measurement area is one or more wind measurement areas in the at least one wind measurement area. When the predetermined wind measurement area is a plurality of wind measurement areas, the fluid aerodynamic data detection unit 430 may extract the fluid at the predetermined wind turbine unit corresponding to the wind speed detected in each wind measurement area from the predetermined database aerodynamic data, and then obtain the mean or maximum value of the extracted fluid aerodynamic data or perform other processing results as the final result.

The following describes in detail how the pre-detection unit 410 obtains the fluid aerodynamic data at the predetermined wind turbine at different wind speeds at various altitudes at different wind measurement areas in the predetermined database.

The pre-detection unit 410 needs to obtain in advance different wind speeds at at least one altitude and fluid aerodynamic data corresponding to the different wind speeds at the predetermined wind turbine for each wind measurement area.

For any wind measurement area, the pre-detection unit 410 needs to establish a corresponding large eddy simulation model to obtain different wind speeds at at least one altitude of the any wind measurement area and the wind turbines at the predetermined wind turbines corresponding to the different wind speeds. fluid aerodynamic data.

Specifically, the pre-detection unit 410 first obtains the function of the wind speed and the altitude at any wind measurement area. In other words, it is necessary to obtain the influence of the geographical conditions at any wind measurement area on the wind speed at different altitudes.

The function about wind speed and altitude can be one of the following functions: the relationship function between wind speed and altitude, the relationship function between wind speed, wind friction speed, and altitude, and the relationship between wind speed, altitude, and atmospheric thermal stability. relationship between functions.

Subsequently, the pre-detection unit 410 uses the obtained function as an inlet boundary condition to establish a large eddy simulation model.

Then, the pre-detection unit 410 uses the established large eddy simulation model to determine fluid aerodynamic data corresponding to the arbitrary wind speed at the predetermined wind turbine.

When using the established large eddy simulation model to determine the fluid aerodynamic data at the predetermined wind turbine corresponding to the arbitrary wind speed, the arbitrary altitude and the arbitrary wind speed are used as the initial stage of the large eddy simulation model Boundary conditions. After the initial boundary conditions are set for the large eddy simulation model, the pre-detection unit 410 can obtain fluid aerodynamic data at the measuring point according to the coordinates of the measuring point.

In this case, the pre-detection unit 410 may determine fluid aerodynamic data corresponding to any wind speed at the predetermined position through the established large eddy simulation model according to the coordinates of the predetermined position on the predetermined wind turbine. For example, the predetermined position may be at least one position on the blade and/or the tower. It should be understood that the predetermined position is not limited thereto, and may be any position on the wind turbine where it is desired to obtain fluid aerodynamic data.

The pre-detection unit 410 may directly obtain the wind speed and/or turbulence intensity at the predetermined position through a large eddy simulation model. In addition, the pre-detection unit 410 can further determine the inflow angle at the predetermined position according to the wind speed in the obtained fluid aerodynamic data

In order to establish a large eddy simulation model corresponding to any wind measurement area, the pre-detection unit 410 first establishes a three-dimensional model of the terrain within a predetermined range including the predetermined wind turbine and the predetermined wind measurement area. That is to say, the three-dimensional shape of the terrain within the predetermined range is converted into data for subsequent modeling.

Subsequently, the pre-detection unit 410 meshes the established 3D model. In a preferred embodiment, further considering the ruggedness of the actual terrain, when the established 3D model is divided into grids, the more rugged the actual geographical location, the denser the grid.

Then, the pre-detection unit 410 sets the inlet boundary conditions and the turbulence model. Here, the inlet boundary conditions are functions as determined above. Compared with using the relationship function between wind speed and altitude as the inlet boundary condition, using the relationship function between wind speed, wind friction speed and altitude as the inlet boundary condition further considers the influence of surface roughness, and the final fluid Aerodynamic data will be more accurate. Compared with using the relationship function between wind speed, wind friction speed and altitude as the inlet boundary condition, using wind speed, altitude and atmospheric thermal stability as the inlet boundary condition can obtain more reliable flow in different airflow environments. pneumatic data. For the turbulence model, various turbulence models used for large eddy simulation can be used, and the present invention is not limited thereto.

Subsequently, the pre-detection unit 410 uses the meshed three-dimensional model and the set inlet boundary conditions and turbulence model to establish a large eddy simulation model.

In a preferred embodiment, when establishing the large eddy simulation model, further consideration may be given to setting a wall function, so as to more accurately model some complex terrains (eg, mountainous areas). The wall function may be the above-mentioned formula (1).

According to the method and device for detecting fluid aerodynamic data of a wind turbine of the present invention, the fluid aerodynamic data at the wind turbine can be determined before the incoming flow reaches the wind turbine, so that the impact of the incoming flow on the wind turbine can be known in advance. In addition, according to the method and device for detecting fluid aerodynamic data of a wind turbine of the present invention, without installing a sensor specially used for detecting fluid aerodynamic data on the wind turbine, the desired position on the wind turbine can be obtained as required Fluid aerodynamic data, and finer-grained fluid aerodynamic data can be obtained, so that fluid aerodynamic data of more locations can be obtained at a lower cost.

Furthermore, the above-described methods according to exemplary embodiments of the present invention can be implemented as a computer program on a computer-readable medium so that when the program is executed, the above-described methods are implemented.

In addition, each unit in the above-described apparatus according to the exemplary embodiments of the present invention may be implemented as a hardware component or a software module. In addition, those skilled in the art can realize each hardware component by using a field programmable gate array (FPGA), an application specific integrated circuit (ASIC) or a processor, for example, according to the processing performed by each defined unit, and can be realized through programming technology individual software modules.

While the invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that changes may be made in form and detail without departing from the spirit and scope of the invention as defined by the claims. various changes.

Claims (20)

1. A method for detecting fluid aerodynamic data of a wind turbine, characterized in that the method comprises: Predetermining the relationship between the wind speed at at least one altitude in at least one wind measuring area preset around the predetermined wind turbine and the fluid aerodynamic data at the predetermined wind turbine; detecting a wind speed at a predetermined altitude of a predetermined wind measuring area in the at least one wind measuring area; Fluid aerodynamic data corresponding to the detected wind speed at the predetermined wind turbine is determined according to a predetermined relationship. 2. The method according to claim 1, wherein the relationship is a predetermined database, and the predetermined database stores a plurality of wind speeds at at least one altitude at the at least one wind measuring area, and a relationship with each Fluid aerodynamic data at the predetermined wind turbines corresponding to each wind speed at each wind measuring area. 3. The method according to claim 1 or 2, characterized in that, the fluid aerodynamic data at the predetermined wind turbine corresponding to any wind speed at any altitude at any wind measurement area is obtained in the following manner : Obtaining a function about wind speed and altitude at any wind measuring area; Using the obtained function as the inlet boundary condition, a large eddy simulation model is established; Using the established large eddy simulation model to determine fluid aerodynamic data corresponding to the arbitrary wind speed at the predetermined wind turbine. 4. The method according to claim 3, wherein the function is one of the following functions: a relational function between wind speed and altitude, a wind speed, a frictional velocity of wind, a relational function between altitude, A function of the relationship between wind speed, altitude, and thermal stability of the atmosphere. 5. method according to claim 3, is characterized in that, the step of setting up large eddy simulation model comprises: building a three-dimensional model of the terrain within a predetermined range including the predetermined wind turbine and the predetermined wind measurement area; Mesh the established 3D model; Set the inlet boundary conditions and turbulence model; The large eddy simulation model is established by using the meshed 3D model and the set inlet boundary conditions and turbulent flow model. 6. The method according to claim 5, wherein the step of establishing a large eddy simulation model further comprises: setting a wall function, The steps of using the meshed 3D model and the set inlet boundary conditions and turbulence model to establish the large eddy simulation model include: using the meshed 3D model and the set inlet boundary conditions, turbulence model and wall function to establish a large eddy simulation model. vortex simulation model, The wall function is as follows: U=U _f ×K×ln((z+z ₀ )/z ₀ ), Among them, U is the average wind speed, U _f is the friction speed of the wind, K is the Karman constant, z ₀ is the length of the surface roughness, and z is the vertical coordinate. 7. The method according to claim 3, wherein the step of using the established large eddy simulation model to determine the fluid aerodynamic data at the predetermined wind turbine place corresponding to the arbitrary wind speed comprises: According to the coordinates of the predetermined position on the predetermined wind turbine, the fluid aerodynamic data corresponding to the arbitrary wind speed at the predetermined position is determined through the established large eddy simulation model. 8. The method of claim 3, wherein the fluid aerodynamic data includes at least one of wind speed, turbulence intensity, and inflow angle. 9. The method according to any one of claims 1 to 8, characterized in that when there is an object around the wind turbine that affects the incoming flow of the predetermined wind turbine, at the windward position of the object Set the wind measurement area. 10. The method according to any one of claims 1 to 8, wherein the predetermined wind measurement area is on the windward side of the predetermined wind turbine. 11. A device for detecting fluid aerodynamic data of a wind turbine, characterized in that the device comprises: A pre-detection unit, predetermining the relationship between the wind speed at at least one altitude in at least one wind measuring area preset around the predetermined wind turbine and the fluid aerodynamic data at the predetermined wind turbine; a wind speed detection unit for detecting a wind speed at a predetermined altitude of a predetermined wind measurement area in the at least one wind measurement area; The fluid aerodynamic data detecting unit determines fluid aerodynamic data corresponding to the detected wind speed at the predetermined wind turbine according to a predetermined relationship. 12. The device according to claim 11, wherein the relationship is a predetermined database, and the predetermined database stores a plurality of wind speeds at at least one altitude at the at least one wind measuring area, and a relationship with each Fluid aerodynamic data at the predetermined wind turbines corresponding to each wind speed at each wind measuring area. 13. The device according to claim 11 or 12, characterized in that the pre-detection unit obtains the wind turbine at the predetermined wind turbine corresponding to any wind speed at any altitude at any wind measurement area in the following manner Fluid Pneumatic Data: Obtaining a function about wind speed and altitude at any wind measuring area; Using the obtained function as the inlet boundary condition, a large eddy simulation model is established; Using the established large eddy simulation model to determine fluid aerodynamic data corresponding to the arbitrary wind speed at the predetermined wind turbine. 14. The device according to claim 12, wherein the function is one of the following functions: a relationship function between wind speed and altitude, a relationship function between wind speed, wind friction speed, and altitude, A function of the relationship between wind speed, altitude, and thermal stability of the atmosphere. 15. The device according to claim 12, wherein the pre-detection unit establishes a large eddy simulation model in the following manner: building a three-dimensional model of the terrain within a predetermined range including the predetermined wind turbine and the predetermined wind measurement area; Mesh the established 3D model; Set the inlet boundary conditions and turbulence model; The large eddy simulation model is established by using the meshed 3D model and the set inlet boundary conditions and turbulent flow model. 16. The device according to claim 14, characterized in that the pre-detection unit is also provided with a wall function, The pre-detection unit uses the 3D model after meshing and the set inlet boundary conditions, turbulence model and wall function to establish a large eddy simulation model. The wall function is as follows: U=U _f ×K×ln((z+z ₀ )/z ₀ ), Among them, U is the average wind speed, U _f is the friction speed of the wind, K is the Karman constant, z ₀ is the length of the surface roughness, and z is the vertical coordinate. 17. The device according to claim 12, characterized in that, the pre-detection unit determines, according to the coordinates of the predetermined position on the predetermined wind turbine, through the established large eddy simulation model Fluid pneumatic data at predetermined locations. 18. The apparatus of claim 12, wherein the fluid aerodynamic data includes at least one of wind speed, turbulence intensity, and inflow angle. 19. The device according to any one of claims 10 to 17, wherein when there is an object around the wind turbine that affects the incoming flow of the predetermined wind turbine, the at least one wind measurement area There is a wind measuring area set upwind of the object in . 20. The method according to any one of claims 10 to 17, wherein the predetermined wind measurement area is on the windward side of the predetermined wind turbine.