Method and device for determining range of sector affected by wake flow

Abstract

The invention provides a method and a device for determining a wake flow influence sector range. The method for determining the wake flow influence sector range comprises the steps that a preset wind speed attenuation range and geographic position information of a first unit and a second unit are obtained, and the preset wind speed attenuation range represents an acceptable range of wind speed attenuation brought by unit wake flow; based on the preset wind speed attenuation range, the radius of a wake flow influence area, with the specific position on the central axis of a hub as the circle center and perpendicular to the central axis of the hub, of the first unit under the target wind condition is determined, and the specific position is related to the geographic position information; and on the basis of the geographical location information and the radius of the wake flow influence area, the wind direction range, influenced by the wake flow of the first unit, of the second unit under the target wind condition is determined.

Description

Technical Field

[0001] The present disclosure generally relates to the field of wind power generation technology, and more specifically, to a method and device for determining a wake impact sector range. Background Art

[0002] A wind turbine generator set (hereinafter referred to as the set) is a device that converts wind energy in flowing air into electrical energy. After the set absorbs part of the energy in the air and applies disturbance, a wake zone affected by the set will be formed downstream of the set. Relative to the free flow, the air speed in the wake zone decreases and the turbulence increases. The sets in a wind farm will be affected by the wake of other nearby sets, causing power generation losses, and will also increase fatigue loads and affect the service life of the sets. The adverse effects of wakes in wind farms can be reduced through wake control. Specifically, the degree to which the downwind sets are affected by the wake of the upwind sets can be reduced by changing the operating status of some sets in the wind farm (such as pitch angle, yaw angle, etc.).

[0003] Accurately evaluating the wind direction range in which downstream units are affected by the wake of upstream units is the basis for effective wake control. However, the wind direction range in which downstream units are affected by the wake of upstream units assessed by existing evaluation methods is not accurate enough. Summary of the invention

[0004] An exemplary embodiment of the present disclosure is to provide a method and device for determining the range of a wake influence sector, which can improve the accuracy of evaluating the wind direction range of a downstream unit affected by the wake of an upstream unit.

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided a method for determining a wake influence sector range, comprising: obtaining a preset wind speed attenuation range and geographic location information of a first unit and a second unit, wherein the preset wind speed attenuation range represents an acceptable range of wind speed attenuation caused by the unit wake; based on the preset wind speed attenuation range, determining a radius of a wake influence area of ​​the first unit under target wind conditions, the radius of the wake influence area being centered at a specific position on the hub centerline and perpendicular to the hub centerline, wherein the specific position is related to the geographic location information; based on the geographic location information and the radius of the wake influence area, determining a wind direction range in which the second unit is affected by the wake of the first unit under the target wind conditions.

[0006] Optionally, the target wind condition includes: the wind speed in front of the impeller of the first unit is the target wind speed and the turbulence intensity is the target turbulence intensity; wherein, based on the preset wind speed attenuation range, the step of determining the radius of the wake influence area of ​​the first unit under the target wind condition, which is centered at a specific position on the hub centerline and perpendicular to the hub centerline, includes: determining the axial thrust coefficient of the first unit when the wind speed in front of the impeller of the first unit is the target wind speed; determining the radius of the wake influence area based on the target turbulence intensity, the axial thrust coefficient and the preset wind speed attenuation range.

[0007] Optionally, the geographical location information includes: longitude and latitude and altitude of the location.

[0008] Optionally, the target wind condition includes: the wind speed in front of the impeller of the first unit is the target wind speed and the turbulence intensity is the target turbulence intensity; wherein, based on the preset wind speed attenuation range, the step of determining the radius of the wake influence area of ​​the first unit under the target wind condition with a specific position on the hub centerline as the center and perpendicular to the hub centerline includes: based on the longitude and latitude of the locations of the first unit and the second unit and the impeller radius of the second unit, determining the correlation between the axial distance of the specific position from the impeller of the first unit and the radius of the wake influence area; determining the radius of the wake influence area based on the correlation, the target turbulence intensity, the target wind speed, and the preset wind speed attenuation range.

[0009] Optionally, the association relationship is: the square of the horizontal distance between the first unit and the second unit is equal to the square of the sum of the radius of the wake influence area and the impeller radius of the second unit plus the square of the axial distance.

[0010] Optionally, based on the geographic location information and the radius of the wake influence area, the step of determining the wind direction range in which the second unit is affected by the wake of the first unit under the target wind condition includes: determining the azimuth from the first unit to the second unit in the horizontal direction based on the longitude and latitude of the locations of the first unit and the second unit; determining the altitude difference between the hub of the first unit and the hub of the second unit based on the altitude and hub height of the locations of the first unit and the second unit; determining the wind direction range based on the azimuth, the altitude difference and the radius of the wake influence area.

[0011] Optionally, the determination method also includes: under the target wind condition, if the wind direction belongs to the wind direction range, calculating the integral factor of the wind speed attenuation coefficient of the second unit affected by the wake of the first unit; in response to the integral factor of the wind speed attenuation coefficient reaching a preset threshold, executing a wake control strategy for the first unit and the second unit.

[0012] Optionally, the step of executing the wake control strategy for the first unit and the second unit includes: controlling the operating state of the first unit and / or the second unit to reduce the wake impact of the first unit on the second unit.

[0013] Optionally, the determination method further includes: under the target wind condition, marking the unit data of the second unit in the time period when the wind direction belongs to the wind direction range as the unit data when the second unit is affected by the wake of the first unit.

[0014] According to a second aspect of an embodiment of the present disclosure, there is provided a device for determining a wake influence sector range, comprising: an information acquisition unit, configured to acquire a preset wind speed attenuation range and geographic location information of a first unit and a second unit, wherein the preset wind speed attenuation range represents an acceptable range of wind speed attenuation caused by the wake of the units; a wake zone radius determination unit, configured to determine, based on the preset wind speed attenuation range, a radius of a wake influence area of ​​the first unit under target wind conditions, with a specific position on the center axis of the hub as the center and perpendicular to the center axis of the hub as the center, wherein the specific position is related to the geographic location information; a wind direction range determination unit, configured to determine, based on the geographic location information and the radius of the wake influence area, a wind direction range in which the second unit is affected by the wake of the first unit under the target wind conditions.

[0015] Optionally, the target wind condition includes: the wind speed in front of the impeller of the first unit is the target wind speed and the turbulence intensity is the target turbulence intensity; wherein the wake area radius determination unit is configured to: determine the axial thrust coefficient of the first unit when the wind speed in front of the impeller of the first unit is the target wind speed; and determine the radius of the wake influence area based on the target turbulence intensity, the axial thrust coefficient, and the preset wind speed attenuation range.

[0016] Optionally, the geographical location information includes: longitude and latitude and altitude of the location.

[0017] Optionally, the target wind conditions include: the wind speed in front of the impeller of the first unit is the target wind speed and the turbulence intensity is the target turbulence intensity; wherein the wake area radius determination unit is configured to: determine the correlation relationship between the axial distance of the specific position from the impeller of the first unit and the radius of the wake impact area based on the longitude and latitude of the locations of the first unit and the second unit and the impeller radius of the second unit; determine the radius of the wake impact area based on the correlation relationship, the target turbulence intensity, the target wind speed, and the preset wind speed attenuation range.

[0018] Optionally, the association relationship is: the square of the horizontal distance between the first unit and the second unit is equal to the square of the sum of the radius of the wake influence area and the impeller radius of the second unit plus the square of the axial distance.

[0019] Optionally, the wind direction range determination unit is configured to: determine the azimuth from the first unit to the second unit in the horizontal direction based on the longitude and latitude of the locations of the first unit and the second unit; determine the altitude difference between the hub of the first unit and the hub of the second unit based on the altitude and hub height of the locations of the first unit and the second unit; determine the wind direction range based on the azimuth, the altitude difference and the radius of the wake influence area.

[0020] Optionally, the determination device also includes: a wake control unit, configured to calculate the wind speed attenuation coefficient integral factor of the second unit affected by the wake of the first unit under the target wind condition if the wind direction belongs to the wind direction range; in response to the wind speed attenuation coefficient integral factor reaching a preset threshold, execute a wake control strategy for the first unit and the second unit.

[0021] Optionally, the wake control unit is configured to: control the operating state of the first unit and / or the second unit to reduce the wake impact of the first unit on the second unit.

[0022] Optionally, the determination device also includes: a data marking unit, configured to mark the unit data of the second unit in the time period when the wind direction belongs to the wind direction range as the unit data when the second unit is affected by the wake of the first unit under the target wind condition.

[0023] According to a third aspect of an embodiment of the present disclosure, a computer-readable storage medium storing a computer program is provided. When the computer program is executed by a processor, the processor is prompted to execute the method for determining the wake impact sector range as described above.

[0024] According to a fourth aspect of an embodiment of the present disclosure, an electronic device is provided, comprising: a processor; and a memory storing a computer program, wherein when the computer program is executed by the processor, the processor is prompted to execute the method for determining the wake impact sector range as described above.

[0025] According to the method and device for determining the wake influence sector range of the exemplary embodiment of the present invention, a sector range determination method that takes into account the wake trail area of ​​the unit and the wind speed attenuation range is proposed to determine the wind direction sector affected by the wake between units, which can improve the accuracy of the assessment of the wind direction range of the downstream unit affected by the wake of the upstream unit.

[0026] In the following description, some aspects and / or advantages of the general inventive concept will be set forth, and some other aspects and / or advantages will be known through the following description or the implementation of the general inventive concept. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] These and / or other aspects and advantages of the present application will become clearer and easier to understand from the following detailed description of the embodiments of the present application in conjunction with the accompanying drawings, in which:

[0028] Figure 1 A flow chart showing a method for determining a wake impact sector range according to an exemplary embodiment of the present disclosure;

[0029] Figure 2 A flow chart showing a method for determining a radius of a wake influence area according to an exemplary embodiment of the present disclosure;

[0030] Figure 3 A flow chart showing a method for determining a wind direction range in which a second unit is affected by a wake of a first unit according to an exemplary embodiment of the present disclosure;

[0031] Figure 4 An example is shown in which a second unit portion is located in a wake influence area of ​​a first unit according to an exemplary embodiment of the present disclosure;

[0032] Figure 5 An example is shown in which the second unit is just not located in the wake influence area of ​​the first unit according to an exemplary embodiment of the present disclosure;

[0033] Figure 6 An example of determining a wind direction range in which a second unit is affected by a wake of a first unit according to an exemplary embodiment of the present disclosure is shown;

[0034] Figure 7 A comparison diagram showing the estimated effects of the wake influence area according to an exemplary embodiment of the present disclosure;

[0035] Figure 8A structural block diagram of a device for determining a wake impact sector range according to an exemplary embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0036] Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like parts throughout. The embodiments will be described below with reference to the drawings in order to explain the present disclosure.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0038] It should be noted that the phrase "at least one of the items" in the present disclosure includes three types of parallel situations: "any one of the items", "a combination of any number of the items", and "all of the items". For example, "including at least one of A and B" includes the following three parallel situations: (1) including A; (2) including B; (3) including A and B. Another example is "executing at least one of step 1 and step 2" which means the following three parallel situations: (1) executing step 1; (2) executing step 2; (3) executing step 1 and step 2.

[0039] Figure 1 A flow chart showing a method for determining a wake influence sector range according to an exemplary embodiment of the present disclosure.

[0040] As an example, the method for determining the wake impact sector range according to the exemplary embodiment of the present disclosure may be performed by a unit controller (e.g., the controller of the first unit and / or the second unit described below) or a field-level controller of a wind farm. In addition, the method for determining the wake impact sector range according to the exemplary embodiment of the present disclosure may be performed by an electronic device with data processing capabilities, for example, the electronic device may be a terminal (such as a personal notebook, a desktop computer, etc.), or a server (such as an independent server, a server cluster, a cloud platform, etc.). The embodiments of the present disclosure are not limited to this.

[0041] Reference Figure 1 In step S101, a preset wind speed attenuation range and geographical location information of the first unit and the second unit are obtained.

[0042] The preset wind speed attenuation range represents the acceptable range of wind speed attenuation caused by the unit wake. It should be understood that the acceptable wind speed attenuation range (i.e., the preset wind speed attenuation range) can be set according to actual conditions and specific needs. For example, the preset wind speed attenuation range ΔU can be set to be less than 0.05m / s. Correspondingly, the area where the wind speed attenuation is less than 0.05m / s due to the unit wake will not be considered as the wake influence area (also referred to as the wake area) generated by the unit; only the area where the wind speed attenuation is greater than or equal to 0.05m / s due to the unit wake will be considered as the wake influence area generated by the unit.

[0043] As an example, the geographic location information of the first unit and the second unit may include: the longitude and latitude and altitude of the location of the first unit, and the longitude and latitude and altitude of the location of the second unit.

[0044] As an example, the first unit and the second unit are units in the same wind farm, for example, the first unit may be a unit around the second unit.

[0045] As an example, the geographical location information of the first unit and the second unit may be obtained from wind farm operation data.

[0046] In step S102, based on a preset wind speed attenuation range, the radius r of the wake influence area of ​​the first unit with a specific position on the hub centerline as the center is determined under target wind conditions.

[0047] Specifically, the wake influence region whose radius is to be determined may be a wake influence region of the first unit that takes a specific position on the center axis of the hub as a circle center and is perpendicular to the center axis of the hub.

[0048] The specific location is related to the geographic location information of the first unit and the second unit. As an example, in the horizontal direction, the distance from the hub of the second unit to the specific location is: the sum of the impeller radius of the second unit and the radius r of the wake influence area.

[0049] As an example, the target wind condition may include: the wind speed in front of the impeller of the first unit is the target wind speed and the turbulence intensity is the target turbulence intensity. For example, the wind speed in front of the impeller of the first unit may specifically refer to the average wind speed at the hub height of the first unit, and the turbulence intensity in front of the impeller of the first unit may specifically refer to the average turbulence intensity at the hub height of the first unit.

[0050] As an example, the axial thrust coefficient of the first unit can be determined when the wind speed in front of the impeller of the first unit is the target wind speed; then, based on the target turbulence intensity, the determined axial thrust coefficient, and the preset wind speed attenuation range, the radius r of the wake influence area can be determined.

[0051] As an example, the axial thrust coefficient C of the first unit at the target wind speed can be obtained by looking up the table. T For example, the impeller diameter of the first unit is 140m, and its wind speed-axial thrust coefficient correspondence table can be shown in Table 1. The C under the wind speed of 7m / s can be determined from Table 1. T The value is 0.8012.

[0052] Table 1 Wind speed-axial thrust coefficient correspondence table

[0053] Wind speed <![CDATA[C T Value]]> 2.5 0.9988 3 0.9681 3.5 0.9355 4 0.845 4.5 0.8011 5 0.8013 5.5 0.8011 6 0.8013 6.5 0.8012 7 0.8012 … … 20 0.0479

[0054] According to an exemplary embodiment of the present disclosure, the radius of the wake influence area is determined based on factors such as the wind speed attenuation range, the unit thrust coefficient, and the turbulence size, so that the accuracy of the radius of the wake influence area can be improved.

[0055] In step S103, based on the geographical location information of the first unit and the second unit and the radius r of the wake influence area, the wind direction range in which the second unit is affected by the wake of the first unit under the target wind condition is determined. In other words, when the wind direction belongs to the determined wind direction range, the second unit will be affected by the wake of the first unit.

[0056] According to the method for determining the wake influence sector range of the exemplary embodiment of the present disclosure, a method for determining the sector range that takes into account the wake trail area of ​​the unit, the wind speed attenuation range, and the unit thrust coefficient is proposed, which can improve the accuracy of the assessment of the wind direction range in which the downstream unit is affected by the wake of the upstream unit.

[0057] The following will be combined Figures 2 to 6 An exemplary embodiment of step S102 and step S103 will be described.

[0058] Figure 2 A flow chart showing a method of determining a radius of a wake influence area according to an exemplary embodiment of the present disclosure.

[0059] Reference Figure 2 In step S201, based on the longitude and latitude of the locations of the first unit and the second unit and the impeller radius of the second unit, the correlation between the axial distance AB of a specific location from the impeller of the first unit and the radius r of the wake influence area is determined.

[0060] As an example, the correlation between the axial distance AB from the specific position to the first unit impeller and the radius r of the wake influence area can be understood as: based on the radius r of the wake influence area, the relationship between the axial distance AB from the specific position to the first unit impeller can be obtained.

[0061] Figure 4An example is shown in which a second unit according to an exemplary embodiment of the present disclosure is partially located in the wake influence area of ​​the first unit. It can be seen that when the wake influence radius circle of the first unit is tangent to the impeller radius circle of the second unit, the second unit is just not affected by the wake of the first unit. Figure 5 An example is shown in which the second unit according to an exemplary embodiment of the present disclosure is just not located in the wake influence area of ​​the first unit, point A represents the hub of the first unit, point B represents a specific position on the center axis of the hub of the first unit, and point C represents the hub of the second unit.

[0062] As an example, see Figure 5 The correlation between the axial distance AB and the radius r of the wake influence area can be: the square of the horizontal distance AC between the first unit and the second unit is equal to the radius r of the wake influence area (that is, Figure 5 DB in the figure) and the impeller radius d2 of the second unit (that is, Figure 5 The sum of the CDs in (i.e., Figure 5 The square of CB in the figure plus the square of the axial distance AB. That is, in, Among them, x1 represents the longitude of the first unit, x2 represents the longitude of the second unit, y1 represents the latitude of the first unit, and y2 represents the latitude of the second unit.

[0063] In step S202, the radius r of the wake influence area is determined based on the correlation between the axial distance AB and the radius r of the wake influence area, the target turbulence intensity, the target wind speed, and the preset wind speed attenuation range.

[0064] As an example, the axial thrust coefficient of the first unit can be determined when the wind speed in front of the impeller of the first unit is the target wind speed, and then the radius r of the wake influence area is determined based on the correlation between the axial distance AB and the radius r of the wake influence area, the target turbulence intensity, the axial thrust coefficient, and the preset wind speed attenuation range.

[0065] As an example, the radius r of the wake influence area of ​​the first unit with a specific position on the hub centerline as the center and perpendicular to the hub centerline under the target wind condition can be determined by the following formula:

[0066]

[0067] in,

[0068] R 9.5D =0.5(R nb +min(h1,R nb ));

[0069] Rnb =max(1.08D,1.08D+21.7D(I a -0.05);

[0070] Among them, C T I represents the axial thrust coefficient of the first unit when the wind speed in front of the impeller of the first unit is the target wind speed; a represents the target turbulence intensity; h1 represents the hub height of the first unit; D represents the diameter of the impeller of the first unit; R 9.5D represents the radius of the wake influence area at the position 9.5D downstream of the impeller of the first unit; D eff Indicates the effective diameter of the first unit; U ∞ represents the average inflow wind speed at the hub height of the first unit; ΔU represents the preset wind speed attenuation range; x0 represents the distance constant; c1 represents the dimensionless mixing length; A0 represents the impeller surface area of ​​the first unit; x represents the axial distance AB from the specific position to the impeller of the first unit.

[0071] According to an exemplary embodiment of the present disclosure, the wake influence area range is calculated for the case where the second unit is just not located in the wake influence area of ​​the first unit, so that the calculated wake influence area range is more reasonable and accurate.

[0072] Figure 3 A flow chart showing a method for determining a wind direction range in which a second unit is affected by a wake of a first unit according to an exemplary embodiment of the present disclosure.

[0073] Reference Figure 3 In step S301, based on the longitude and latitude of the locations of the first unit and the second unit, the azimuth from the first unit to the second unit in the horizontal direction is determined.

[0074] As an example, the azimuth angle from the first unit to the second unit in the horizontal direction is

[0075] In step S302, based on the altitudes and hub heights of the locations of the first unit and the second unit, the altitude difference between the hub of the first unit and the hub of the second unit is determined.

[0076] As an example, the altitude difference between the hub of the first unit and the hub of the second unit is ΔH=|z1-z2+h1-h2|, wherein z1 represents the altitude of the geographical location of the first unit, z2 represents the altitude of the geographical location of the second unit, h1 represents the hub height of the first unit, and h2 represents the hub height of the second unit.

[0077] In step S303, based on the azimuth angle from the first unit to the second unit in the horizontal direction, the altitude difference between the hub of the first unit and the hub of the second unit, and the radius r of the wake influence area, the wind direction range in which the second unit is affected by the wake of the first unit under the target wind condition is determined.

[0078] As an example, see Figure 6 , under the target wind condition, the wind direction range of the second unit affected by the wake of the first unit is: (a1-CAB′, a1+CAB′), where the angle between CA and AB′ is Among them, BB′=ΔH, BB′ is perpendicular to CB′ and BB′ is perpendicular to AB′.

[0079] In the existing related technologies, the estimated wake impact sector range is only related to the impeller diameter and the horizontal distance between the units, and does not take into account the influence of factors such as the altitude difference between the units, the unit thrust coefficient, and the size of turbulence, resulting in the estimated wake impact sector range being inaccurate. To address this problem, the present disclosure proposes an evaluation method that considers factors such as the altitude difference between the units, the unit wake area (i.e., the boundary area of ​​the wake), the wind speed attenuation range, the unit thrust coefficient, and the size of turbulence to determine the wind direction range in which the downstream unit is affected by the wake of the upstream unit.

[0080] Figure 7 A comparison diagram showing the estimated effects of the wake influence area according to an exemplary embodiment of the present disclosure. Figure 7 The horizontal axis in the figure represents the axial distance from the impeller of the unit, and the vertical axis represents the estimated radius of the unit wake influence area. The coordinate value "5" in the figure represents 5 times the impeller diameter, and other coordinate values ​​are deduced by analogy. It can be seen that the wake influence area determined according to the exemplary embodiment of the present disclosure is smaller and more accurate.

[0081] As an example, the method for determining the wake impact sector range according to the exemplary embodiment of the present disclosure may also include: under the target wind conditions, if the wind direction belongs to the above-determined wind direction range, calculating the wind speed attenuation coefficient integral factor of the second unit affected by the wake of the first unit; in response to the calculated wind speed attenuation coefficient integral factor reaching a preset threshold, executing a wake control strategy for the first unit and the second unit.

[0082] As an example, the operating state (eg, pitch angle, yaw angle, etc.) of the first unit and / or the second unit may be controlled to reduce the wake effect of the first unit on the second unit.

[0083] Through the exemplary embodiments of the present disclosure, it is possible to obtain the wind direction range in which the second unit is affected by the wake of the first unit under any wind conditions (i.e., under different wind speeds and turbulence intensities). Therefore, it is possible to determine whether the second unit is affected by the wake of the first unit at the current moment according to the current wind conditions and wind direction. The greater the wake influence, the greater the area S of the overlapping area between the wake circle of the first unit and the impeller circle of the second unit. When the wind speed attenuation coefficient of each point in the overlapping area (|wind speed of the point - average inflow wind speed at the hub height of the first unit| / average inflow wind speed at the hub height of the first unit) is greater, if the integral factor β of the wind speed attenuation coefficient on the impeller surface (i.e., the value obtained by integrating the wind speed attenuation coefficients of each point in the overlapping area) reaches the threshold, the wake control strategy is triggered to adjust the control of the unit.

[0084] Through the exemplary embodiments of the present disclosure, it is possible to obtain the wind direction range in which one of any two units in a wind farm is affected by the wake of another unit under any wind conditions. In a large wind farm, the downstream unit will inevitably be affected by the wake of at least one upstream unit. In the process of estimating the wind farm power using the analytical wake model, the wake superposition model can be used to calculate the wake superposition effect in the wind farm. For example, the wake superposition model can be as follows:

[0085]

[0086] Among them, u i represents the average inflow wind speed before the i-th unit, u j represents the average inflow wind speed before the jth unit upstream, u ji represents the average inflow wind speed of the wake of the jth upstream unit at the ith unit, u0 represents the free flow wind speed, and n represents the total number of units.

[0087] As an example, the analytical wake model based on the exemplary embodiments according to the present disclosure may include, but is not limited to: Larsen wake model. For example, a wake model of CFD simulation may also be used.

[0088] According to the exemplary embodiment of the present disclosure, it is convenient to control the unit according to the wake influence index in real time to improve the overall power generation of the unit.

[0089] As an example, the method for determining the wake impact sector range according to the exemplary embodiment of the present disclosure may further include: under the target wind condition, marking the unit data of the second unit in the period when the wind direction belongs to the above-determined wind direction range as the unit data when the second unit is affected by the wake of the first unit. In order to distinguish the unit data of the period when the second unit is affected by the wake, it is convenient to classify the unit data, and the classified unit data can be used as the basis for other data processing.

[0090] Figure 8 A structural block diagram of a device for determining a wake impact sector range according to an exemplary embodiment of the present disclosure is shown.

[0091] Reference Figure 8 According to an exemplary embodiment of the present disclosure, a device for determining a wake influence sector range includes: an information acquisition unit 101 , a wake area radius determination unit 102 , and a wind direction range determination unit 103 .

[0092] Specifically, the information acquisition unit 101 is configured to acquire a preset wind speed attenuation range and geographical location information of the first unit and the second unit, wherein the preset wind speed attenuation range represents an acceptable range of wind speed attenuation caused by the wake of the unit.

[0093] The wake area radius determination unit 102 is configured to determine the radius of the wake influence area of ​​the first unit under the target wind conditions, with a specific position on the hub centerline as the center and perpendicular to the hub centerline, based on the preset wind speed attenuation range, wherein the specific position is related to the geographic location information.

[0094] The wind direction range determining unit 103 is configured to determine the wind direction range in which the second unit is affected by the wake of the first unit under the target wind condition based on the geographical location information and the radius of the wake influence area.

[0095] As an example, the target wind condition may include: the wind speed in front of the impeller of the first unit is the target wind speed and the turbulence intensity is the target turbulence intensity.

[0096] As an example, the wake area radius determination unit 102 can be configured to: determine the axial thrust coefficient of the first unit when the wind speed in front of the impeller of the first unit is the target wind speed; based on the target turbulence intensity, the axial thrust coefficient, and the preset wind speed attenuation range, determine the radius of the wake influence area.

[0097] As an example, the geographic location information may include: the latitude, longitude and altitude of the location.

[0098] As an example, the wake area radius determination unit 102 can be configured to: determine the correlation between the axial distance of the specific position from the impeller of the first unit and the radius of the wake impact area based on the longitude and latitude of the locations of the first unit and the second unit and the impeller radius of the second unit; determine the radius of the wake impact area based on the correlation, the target turbulence intensity, the target wind speed, and the preset wind speed attenuation range.

[0099] As an example, the association relationship may be: the square of the horizontal distance between the first unit and the second unit is equal to the square of the sum of the radius of the wake influence area and the impeller radius of the second unit plus the square of the axial distance.

[0100] As an example, the wind direction range determination unit 103 can be configured to: determine the azimuth from the first unit to the second unit in the horizontal direction based on the longitude and latitude of the locations of the first unit and the second unit; determine the altitude difference between the hub of the first unit and the hub of the second unit based on the altitude and hub height of the locations of the first unit and the second unit; determine the wind direction range based on the azimuth, the altitude difference, and the radius of the wake influence area.

[0101] As an example, the device for determining the wake impact sector range according to the exemplary embodiment of the present disclosure may also include: a wake control unit (not shown), the wake control unit being configured to, under the target wind condition, if the wind direction belongs to the wind direction range, calculate the wind speed attenuation coefficient integral factor of the second unit affected by the wake of the first unit; in response to the wind speed attenuation coefficient integral factor reaching a preset threshold, execute a wake control strategy for the first unit and the second unit.

[0102] As an example, the wake control unit may be configured to: control the operating state of the first unit and / or the second unit to reduce the wake impact of the first unit on the second unit.

[0103] As an example, the device for determining the wake influence sector range according to the exemplary embodiment of the present disclosure may also include: a data marking unit (not shown), which is configured to mark the unit data of the second unit in the time period when the wind direction belongs to the wind direction range as the unit data when the second unit is affected by the wake of the first unit under the target wind condition.

[0104] It should be understood that the specific processing performed by the device for determining the wake impact sector range according to the exemplary embodiment of the present disclosure has been referred to in detail. Figures 1 to 7 The details have been described in detail and will not be repeated here.

[0105] It should be understood that the various units in the device for determining the wake impact sector range according to the exemplary embodiment of the present disclosure can be implemented as hardware components and / or software components. Those skilled in the art can implement the various units, for example, using a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC), according to the processing performed by the various units defined.

[0106] An exemplary embodiment of the present disclosure provides a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to execute the method for determining the wake impact sector range as described in the above exemplary embodiment. The computer-readable storage medium is any data storage device that can store data read by a computer system. Examples of computer-readable storage media include: read-only memory, random access memory, read-only optical disk, magnetic tape, floppy disk, optical data storage device, and carrier wave (such as data transmission through the Internet via a wired or wireless transmission path).

[0107] An electronic device according to an exemplary embodiment of the present disclosure includes: a processor (not shown) and a memory (not shown), wherein the memory stores a computer program, and when the computer program is executed by the processor, it prompts the processor to execute the method for determining the wake impact sector range as described in the above exemplary embodiment.

[0108] As an example, the electronic device may be a unit controller (e.g., a controller of the first unit and / or the second unit) or a field-level controller of a wind farm. In addition, it may also be other electronic devices with data processing capabilities, for example, the electronic device may be a terminal (e.g., a personal notebook, a desktop, etc.), or a server (e.g., an independent server, a server cluster, a cloud platform, etc.). The embodiments of the present disclosure are not limited to this.

[0109] Although some exemplary embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that modifications may be made to these embodiments without departing from the scope and spirit of the present disclosure as defined by the claims and their equivalents.

Claims

1. A method for determining the wake impact sector range, characterized in that: include: Acquire a preset wind speed attenuation range and geographical location information of the first unit and the second unit, wherein the preset wind speed attenuation range represents an acceptable range of wind speed attenuation caused by the wake of the unit; Based on the preset wind speed attenuation range, determine the radius of the wake influence area of ​​the first unit under the target wind condition, with a specific position on the hub centerline as the center and perpendicular to the hub centerline, wherein the specific position is related to the geographic location information; Based on the geographic location information and the radius of the wake influence area, a wind direction range in which the second unit is affected by the wake of the first unit under the target wind condition is determined.

2. The determination method according to claim 1, characterized in that: The target wind condition includes: the wind speed in front of the impeller of the first unit is the target wind speed and the turbulence intensity is the target turbulence intensity; Wherein, based on the preset wind speed attenuation range, the step of determining the radius of the wake influence area of ​​the first unit under the target wind condition, which is centered at a specific position on the hub centerline and is perpendicular to the hub centerline, comprises: determining an axial thrust coefficient of the first unit when the wind speed in front of the impeller of the first unit is the target wind speed; The radius of the wake influence area is determined based on the target turbulence intensity, the axial thrust coefficient, and the preset wind speed attenuation range.

3. The determination method according to claim 1, characterized in that: The geographical location information includes: the latitude, longitude and altitude of the location.

4. The determination method according to claim 3, characterized in that: The target wind condition includes: the wind speed in front of the impeller of the first unit is the target wind speed and the turbulence intensity is the target turbulence intensity; Wherein, based on the preset wind speed attenuation range, the step of determining the radius of the wake influence area of ​​the first unit under the target wind condition, which is centered at a specific position on the hub centerline and is perpendicular to the hub centerline, comprises: Based on the longitude and latitude of the locations of the first unit and the second unit and the impeller radius of the second unit, determining a correlation relationship between the axial distance of the specific location from the impeller of the first unit and the radius of the wake influence area; The radius of the wake influence area is determined based on the association relationship, the target turbulence intensity, the target wind speed, and the preset wind speed attenuation range.

5. The determination method according to claim 4, characterized in that: The correlation relationship is: the square of the horizontal distance between the first unit and the second unit is equal to the square of the sum of the radius of the wake influence area and the impeller radius of the second unit plus the square of the axial distance.

6. The determination method according to claim 4, characterized in that: The step of determining, based on the geographical location information and the radius of the wake influence area, a wind direction range in which the second unit is affected by the wake of the first unit under the target wind condition comprises: Determine the azimuth angle from the first unit to the second unit in the horizontal direction based on the longitude and latitude of the locations of the first unit and the second unit; Determine the altitude difference between the hub of the first unit and the hub of the second unit based on the altitudes and hub heights of the locations of the first unit and the second unit; The wind direction range is determined based on the azimuth, the altitude difference, and the radius of the wake influence area.

7. The determination method according to claim 1, characterized in that: The determination method further comprises: Under the target wind condition, if the wind direction belongs to the wind direction range, calculating the integral factor of the wind speed attenuation coefficient of the second unit affected by the wake of the first unit; In response to the wind speed attenuation coefficient integral factor reaching a preset threshold, a wake control strategy is executed for the first unit and the second unit.

8. The determination method according to claim 7, characterized in that: The step of executing the wake control strategy for the first unit and the second unit includes: Control the operating state of the first unit and / or the second unit to reduce the wake effect of the first unit on the second unit.

9. The determination method according to claim 1, characterized in that: The determination method further includes: under the target wind condition, marking the unit data of the second unit in a period when the wind direction belongs to the wind direction range as the unit data when the second unit is affected by the wake of the first unit.

10. A device for determining the scope of wake impact sectors, characterized in that: include: An information acquisition unit is configured to acquire a preset wind speed attenuation range and geographical location information of the first unit and the second unit, wherein the preset wind speed attenuation range represents an acceptable range of wind speed attenuation caused by the wake of the unit; a wake zone radius determination unit, configured to determine, based on the preset wind speed attenuation range, a radius of a wake influence area of ​​the first unit under a target wind condition, the radius of the wake influence area having a specific position on the hub centerline as a circle center and being perpendicular to the hub centerline, wherein the specific position is related to the geographic location information; The wind direction range determination unit is configured to determine the wind direction range in which the second unit is affected by the wake of the first unit under the target wind condition based on the geographical location information and the radius of the wake influence area.

11. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the processor is prompted to execute the method for determining the wake influence sector range according to any one of claims 1 to 9.

12. An electronic device, characterized in that: The electronic device comprises: processor; A memory storing a computer program, which, when executed by a processor, prompts the processor to execute the method for determining the wake impact sector range according to any one of claims 1 to 9.

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