Wind farm wake wind speed calculation method in yaw control mode, medium and equipment
Patent Information
- Application Number
- CN202611237988.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-14
- Publication Date
- 2026-10-27
AI Technical Summary
尾流效应不仅会降低风电场的发电量，还会加剧风电场内机组的风况非均匀性，导致部分机组承受较高的疲劳载荷，增加风电场的故障概率和维护成本
[0048]与现有技术相比，本发明实施例所提供的一种在偏航控制工况下的风电场尾流风速计算方法、介质及设备所达到的有益效果包括：
Smart Images
Figure CN122987758A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a method, medium, and equipment for calculating the wake wind speed of a wind farm under yaw control conditions, belonging to the technical field of active wake control of wind farms and wind power generation operation. Background Technology
[0002] With the rapid development of the wind power industry, the spacing between wind turbines in wind farms is gradually shortening, and the wake effect is increasingly affecting the output power of wind turbines in large wind farms. The wake effect not only reduces the power generation of wind farms, but also exacerbates the non-uniformity of wind conditions within the wind farm, causing some turbines to bear higher fatigue loads, increasing the probability of failure and maintenance costs of wind farms.
[0003] While classic models such as the Jensen wake model are simple in principle and effective, and widely used in wind farm control engineering, they are only applicable when the wind turbine is directly facing the wind speed. They are not suitable for the impact of the turbine on the wake when it yaws. When the turbine's yaw angle deviates from the wind direction, it causes the wake centerline to be skewed, thereby changing the wake effect area of downstream turbines.
[0004] Currently, Active Wake Control (AWC) reduces the wake effect on downstream turbines by adjusting the yaw angle of upstream turbines to deflect the wake centerline. This is an important means to improve wind farm power generation and even out fatigue loads. To achieve active wake control that reduces the wake effect on downstream turbines by adjusting the yaw angle, a calculation method that accurately reflects the wake wind speed distribution under yaw conditions is urgently needed. Summary of the Invention
[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method, medium, and equipment for calculating the wake wind speed of a wind farm under yaw control conditions, which can improve the accuracy of wind farm wake wind speed calculation. To achieve the above objective, this invention is implemented using the following technical solution:
[0006] In a first aspect, the present invention provides a method for calculating the wake wind speed of a wind farm under yaw control conditions, comprising:
[0007] Obtain the location coordinates and incoming wind direction data of each wind turbine in the wind farm;
[0008] The position coordinates are transformed based on the incoming wind direction data, and the windward sequence of each unit along the incoming wind direction is determined based on the transformed coordinates.
[0009] Obtain the yaw angle of the upstream unit in the windward sequence, and use the yaw wake model to update the center position of the wake influence area of the upstream unit in the rotor area of the downstream unit according to the yaw angle.
[0010] Based on the updated center position, calculate the area of the overlapping region between the wake influence area and the downstream turbine rotor area, and determine the area ratio based on the overlapping area.
[0011] Based on the overlapping area and area ratio, the final inflow wind speed of the downstream unit under yaw control conditions is calculated.
[0012] In conjunction with the first aspect, optionally, the step of transforming the position coordinates based on the incoming wind direction data and determining the windward sequence of each unit along the incoming wind direction based on the transformed coordinates includes:
[0013] Taking due north as 0° and taking values sequentially in a clockwise direction, the coordinate system is rotated when the incoming wind direction changes. When the angle is adjusted, the position coordinates of each wind turbine are rotated and transformed, as expressed by the following formula:
[0014] ,
[0015] in, For the first The transformed position coordinates of the generator set. For the first Position coordinates of the generator set before the transformation. The angle by which the wind farm coordinate system is rotated due to the direction of the incoming wind;
[0016] The transformed coordinates are arranged from largest to smallest according to the Y-axis coordinate values to determine the windward sequence of each unit under the current incoming wind direction.
[0017] In conjunction with the first aspect, optionally, the yaw wake model is the Jensen wake model, and the wake radius and wake speed of the upstream unit in the rotor region of the downstream unit are calculated by the following formula:
[0018] ,
[0019] in, The wake radius of the upstream unit in the rotor region of the downstream unit. The radius of the wind turbine of the downstream unit. The wake attenuation factor, Let X be the diameter of the turbine rotor. The ratio, where X is the distance from the location where the wake wind speed is calculated to the upstream unit; The wind speed at the location used to calculate the wake wind speed. For the incoming wind speed, This is the thrust coefficient.
[0020] In conjunction with the first aspect, optionally, the step of using the yaw wake model to update the center position of the wake influence area of the upstream unit in the rotor area of the downstream unit according to the yaw angle includes:
[0021] Obtaining the upstream units in the windward sequence With downstream units The relative positional relationship, wherein the relative positional relationship includes the distance between the two units. and the azimuth angles of the two units ;
[0022] According to the upstream units in the windward sequence Yaw angle And the thrust coefficient, determine the offset of the wake centerline relative to the wake centerline under the non-yaw condition. ,in The deflection coefficient of the yaw wake;
[0023] Based on offset The angle by which the wind farm coordinate system is rotated, taking into account the relative positional relationship and the direction of the incoming wind. The axial and radial distances of the downstream unit in the wake of the upstream unit are calculated and expressed by the following formula:
[0024] ,
[0025] in, For downstream units Upstream units The axial distance in the wake, For downstream units Upstream units The radial distance in the wake.
[0026] In conjunction with the first aspect, optionally, under yaw control conditions, the output power of the wind turbine and the maximum output power when no yaw occurs satisfy a cubic relationship, expressed by the following formula:
[0027] ,
[0028] in, Yaw angle The output power of the wind turbine unit below This represents the maximum output power when yaw occurs.
[0029] In conjunction with the first aspect, optionally, the step of calculating the overlapping area of the wake influence region and the downstream turbine rotor region based on the updated center position, and determining the area ratio based on the overlapping area, includes:
[0030] Determine the radial distance of the downstream unit in the wake of the upstream unit within the updated wake influence area. ;
[0031] Based on radial distance The wake radius of the upstream unit in the rotor region of the downstream unit and the rotor radius of downstream units Determine the intersection state between the wake section and the downstream turbine rotor region;
[0032] Under yaw control conditions, the wake section partially overlaps with the rotor region. This partial overlap includes... and Two scenarios:
[0033] when When the overlapping area is reached, the area is calculated using the following formula:
[0034] ,
[0035] when When the overlapping area is reached, the area is calculated using the following formula:
[0036] ,
[0037] in, The area of the overlapping region. The vertical distance from the center of the downstream turbine rotor region to the common chord of the two circles is denoted as . It is half the length of the common chord of the two circles.
[0038] In conjunction with the first aspect, optionally, the area ratio is the ratio of the overlapping area to the area of the downstream turbine rotor region, expressed by the following formula:
[0039] ,
[0040] in, For downstream units Upstream units The area ratio in the wake.
[0041] In conjunction with the first aspect, optionally, the calculation of the final inflow wind speed of the downstream unit under yaw control conditions based on the overlapping area and area ratio is expressed by the following formula:
[0042] ,
[0043] in, For downstream units The final inflow wind speed under yaw control conditions For the incoming wind speed, For downstream units Upstream units The area ratio in the wake, To consider only upstream wind turbines For downstream wind turbines The wake effect occurs at the downstream fan. The wind speed calculated at that location, For upstream units The actual inflow velocity at the location.
[0044] In a second aspect, the present invention provides a computer-readable storage medium having a computer program / instruction stored thereon, which, when executed by a processor, implements the steps of the wind farm wake wind speed calculation method under yaw control conditions as described in the first aspect.
[0045] Thirdly, the present invention provides a computer device, comprising:
[0046] Memory, used to store computer programs / instructions;
[0047] A processor is configured to execute the computer program / instructions to implement the steps of the wind farm wake wind speed calculation method under yaw control conditions as described in the first aspect.
[0048] Compared with the prior art, the beneficial effects achieved by the wind farm wake wind speed calculation method, medium and equipment under yaw control conditions provided by the embodiments of the present invention include:
[0049] This invention acquires the position coordinates and incoming wind direction data of each wind turbine in a wind farm; transforms the position coordinates based on the incoming wind direction data, and determines the windward sequence of each turbine along the incoming wind direction based on the transformed coordinates; this invention enables wake calculation to adapt to different incoming wind directions by rotating and reordering the coordinates of all turbines in the field according to the incoming wind direction, and can realize dynamic determination of the windward sequence in changing wind direction scenarios, making the method applicable to complex wind conditions;
[0050] This invention obtains the yaw angle of the upstream unit in the windward sequence and uses the yaw wake model to update the center position of the wake influence area of the upstream unit in the rotor area of the downstream unit based on the yaw angle. This invention introduces the yaw angle as an active control variable into the wake model, calculates the spatial offset of the wake centerline caused by yaw and updates the center position of the wake influence area at the downstream unit accordingly, thus making up for the inherent defect of the classic Jensen wake model, which is only applicable to the case where the unit is facing the incoming flow and cannot handle the wake skew caused by yaw. This enables the wake calculation method to have the ability to respond to yaw control commands in real time.
[0051] This invention calculates the overlapping area of the wake influence region and the downstream turbine rotor region based on the updated center position, and determines the area ratio based on the overlapping area. Compared with the traditional method where the wake center extends in a straight line along the wind direction and the overlapping area is statically fixed, this invention can accurately reflect the change in the actual wind-receiving area of the downstream turbine during continuous changes in the yaw angle. This invention specifically distinguishes two partially overlapping geometric cases and provides area calculation formulas for them, taking into account the characteristics of wake center offset caused by yaw. This avoids the problem of calculation distortion in the traditional single line segment method under yaw conditions and significantly improves the calculation accuracy of the overlapping area under yaw control.
[0052] This invention calculates the final inflow wind speed of downstream units under yaw control conditions based on the area and area ratio of overlapping regions. This invention overcomes the shortcomings of traditional superposition models that cannot distinguish the true contribution of each upstream unit under yaw conditions, and provides a calculation framework that conforms to the principle of energy conservation for the accurate solution of the inflow wind speed of downstream units. Attached Figure Description
[0053] Figure 1 This is a flowchart illustrating a method for calculating the wake wind speed of a wind farm under yaw control conditions, provided in Embodiment 1 of the present invention.
[0054] Figure 2 This is a schematic diagram of the Jensen wake model in a wind farm wake wind speed calculation method under yaw control conditions provided in Embodiment 1 of the present invention.
[0055] Figure 3 This is a schematic diagram of the turbine wake skew in a wind farm wake wind speed calculation method under yaw control conditions provided in Embodiment 1 of the present invention.
[0056] Figure 4 This is a curve showing the influence of yaw angle on the output power of a wind turbine in a wind farm wake wind speed calculation method under yaw control conditions, provided in Embodiment 1 of the present invention.
[0057] Figure 5 This is a schematic diagram of the wind turbine overlapping part in a wind farm wake wind speed calculation method under yaw control conditions provided in Embodiment 1 of the present invention;
[0058] Figure 6 This is a schematic diagram of the wind farm unit position and coordinate system rotation in a wind farm wake wind speed calculation method under yaw control conditions provided in Embodiment 1 of the present invention. Detailed Implementation
[0059] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.
[0060] Example 1:
[0061] like Figure 1 As shown in the figure, this embodiment provides a method for calculating the wake wind speed of a wind farm under yaw control conditions, including:
[0062] Obtain the location coordinates and incoming wind direction data of each wind turbine in the wind farm;
[0063] The position coordinates are transformed based on the incoming wind direction data, and the windward sequence of each unit along the incoming wind direction is determined based on the transformed coordinates.
[0064] Obtain the yaw angle of the upstream unit in the windward sequence, and use the yaw wake model to update the center position of the wake influence area of the upstream unit in the rotor area of the downstream unit according to the yaw angle.
[0065] Based on the updated center position, calculate the area of the overlapping region between the wake influence area and the downstream turbine rotor area, and determine the area ratio based on the overlapping area.
[0066] Based on the overlapping area and area ratio, the final inflow wind speed of the downstream unit under yaw control conditions is calculated.
[0067] The specific steps include:
[0068] Step 1: Obtain the location coordinates and incoming wind direction data of each wind turbine in the wind farm.
[0069] It accesses real-time operating data of each wind turbine in a large wind farm. The real-time operating data includes the position coordinates of each wind turbine and the incoming wind direction data, which is used to provide basic data support for subsequent coordinate transformation, windward sorting and yaw wake calculation.
[0070] In this embodiment, a global rectangular coordinate system is established with the southwest corner of the wind farm as the origin, and the position and initial coordinates of each unit are determined in this coordinate system.
[0071] Step 2: Transform the position coordinates according to the incoming wind direction data, and determine the windward sequence of each unit along the incoming wind direction based on the transformed coordinates.
[0072] With true north as 0°, the incoming wind direction is taken sequentially in a clockwise direction. The current incoming wind direction angle is read; when the incoming wind direction changes, the coordinate system is rotated. When the angle is adjusted, the position coordinates of each wind turbine are rotated and transformed, as expressed by the following formula:
[0073] ,
[0074] in, For the first The transformed position coordinates of the generator set. For the first The position coordinates of the generator set before the transformation. The angle by which the wind farm coordinate system rotates due to the direction of the incoming wind flow.
[0075] The transformed new coordinates are arranged from largest to smallest according to the Y-axis coordinate value to establish the order of wake influence from upstream to downstream, thereby determining the windward sequence of each unit under the current incoming wind direction.
[0076] like Figure 6 As shown, when the incoming wind direction changes, the wind farm coordinate system rotates with the wind direction, the coordinates of each turbine change accordingly, and the windward sequence is dynamically adjusted. Through the above coordinate transformation and sorting, the wake calculation can adapt to different incoming wind directions, realizing the dynamic determination of the windward sequence in changing wind direction scenarios, effectively expanding the applicability of the method to complex wind conditions.
[0077] Step 3: Obtain the yaw angle of the upstream unit in the windward sequence, and use the yaw wake model to update the center position of the wake influence area of the upstream unit in the rotor area of the downstream unit based on the yaw angle.
[0078] Step 3.1: The yaw wake model is the Jensen wake model. The wake radius and wake wind speed of the upstream unit in the rotor region of the downstream unit are calculated using the following formula:
[0079] ,
[0080] in, The wake radius of the upstream unit in the rotor region of the downstream unit. The radius of the wind turbine of the downstream unit. The wake attenuation factor, Let X be the diameter of the turbine rotor. The ratio, where X is the distance from the location where the wake wind speed is calculated to the upstream unit; The wind speed at the location used to calculate the wake wind speed. For the incoming wind speed, This is the thrust coefficient.
[0081] wake attenuation factor The constant is used when calculating the wake of onshore wind turbines. The value is typically taken as 0.075 when calculating the wake of offshore wind turbines. The typical value is 0.04.
[0082] In this embodiment, an axial induction factor is introduced. According to the momentum theory of wind turbines, the relationship between momentum and thrust coefficient is expressed as follows: ;
[0083] Substituting the values, we get the wind speed in the wake region:
[0084] .
[0085] like Figure 2 As shown, the geometric relationship of the linear expansion of the wake radius in the downstream direction in the Jensen wake model is illustrated.
[0086] Step 3.2: Use the yaw wake model to update the center position of the wake influence area of the upstream unit in the rotor area of the downstream unit according to the yaw angle.
[0087] Step 3.2.1: Obtain the upstream unit in the windward sequence With downstream units The relative positional relationship, wherein the relative positional relationship includes the distance between the two units. and the azimuth angles of the two units .
[0088] Step 3.2.2: Based on the upstream units in the windward sequence Yaw angle And the thrust coefficient, determine the offset of the wake centerline relative to the wake centerline under the non-yaw condition. ,in The deflection coefficient of the yaw wake.
[0089] The deflection coefficient of the yaw wake is used to characterize the effect of the unit's yaw angle on the deflection of the wake centerline. In this embodiment, the value is taken as 0.3.
[0090] Step 3.2.3: Based on the offset The angle by which the wind farm coordinate system is rotated, taking into account the relative positional relationship and the direction of the incoming wind. The axial and radial distances of the downstream unit in the wake of the upstream unit are calculated and expressed by the following formula:
[0091] ,
[0092] in, For downstream units Upstream units The axial distance in the wake, For downstream units Upstream units The radial distance in the wake.
[0093] like Figure 3 As shown, upstream units After yaw, the wake centerline shifted spatially relative to the non-yaw condition, affecting downstream units. The axial and radial distances in the wake change accordingly. This embodiment introduces the yaw angle as an active control variable into the wake model. By calculating the spatial offset of the wake centerline caused by yaw and updating the center position of the wake influence area at the downstream unit, it overcomes the inherent defect of the classic Jensen wake model, which is only applicable to the case where the unit is facing the incoming flow and cannot handle the wake skew caused by yaw. This enables the wake calculation method to have the ability to respond to yaw control commands in real time.
[0094] Under yaw control conditions, the output power of the wind turbine follows a cubic relationship with the maximum output power when yaw is not occurring, as expressed by the following formula:
[0095] ,
[0096] in, Yaw angle The output power of the wind turbine unit below This represents the maximum output power when yaw occurs.
[0097] like Figure 4 As shown, the output power of the wind turbine decreases cubically with increasing yaw angle. This relationship provides a quantitative assessment method for the power cost of yaw action in active wake control, taking into account both wake wind speed calculation and power generation assessment, thus providing an effective cost constraint for optimal yaw angle decision-making.
[0098] Step 4: Based on the updated center position, calculate the overlapping area of the wake influence area and the downstream turbine rotor area, and determine the area ratio based on the overlapping area.
[0099] Step 4.1: Calculate the area of the overlapping region between the wake influence area and the downstream turbine rotor area.
[0100] Determine the radial distance of the downstream unit in the wake of the upstream unit within the updated wake influence area. , which is the radial distance between the center of the wake section of the updated wake influence area and the center of the downstream turbine rotor area.
[0101] Based on radial distance The wake radius of the upstream unit in the rotor region of the downstream unit and the rotor radius of downstream units Determine the intersection status between the wake section and the downstream turbine rotor area.
[0102] Under yaw control conditions, the wake section partially overlaps with the rotor region. This partial overlap includes... and Two scenarios:
[0103] when When the overlapping area is reached, the area is calculated using the following formula:
[0104] ,
[0105] when When the overlapping area is reached, the area is calculated using the following formula:
[0106] ,
[0107] in, The area of the overlapping region. The vertical distance from the center of the downstream turbine rotor region to the common chord of the two circles is denoted as . It is half the length of the common chord of the two circles.
[0108] like Figure 5 As shown, under yaw control conditions, due to the shift in the wake center, the wake cross-section and the wind turbine area no longer maintain a concentric or complete coverage relationship, but rather exhibit partial overlap. Compared to the traditional method where the wake center extends linearly along the wind direction and the overlapping area is statically fixed, this embodiment can accurately reflect the change in the actual wind-receiving area of the downstream unit during continuous changes in the yaw angle. This embodiment specifically distinguishes between two partially overlapping geometric cases and provides area calculation formulas for each, addressing the wake center shift characteristics caused by yaw. This avoids the calculation distortion problem of the traditional single-segment method under yaw conditions and significantly improves the calculation accuracy of the overlapping area under yaw control.
[0109] Step 4.2: Determine the area ratio based on the area of the overlapping region.
[0110] The area ratio is the ratio of the overlapping area to the area of the downstream turbine rotor region, expressed by the following formula:
[0111] ,
[0112] in, For downstream units Upstream units The area ratio in the wake.
[0113] Step 5: Based on the overlapping area and area ratio, calculate the final inflow wind speed of the downstream unit under yaw control conditions.
[0114] This can be expressed by the following formula:
[0115] ,
[0116] in, For downstream units The final inflow wind speed under yaw control conditions For the incoming wind speed, For downstream units Upstream units The area ratio in the wake, To consider only upstream wind turbines For downstream wind turbines The wake effect occurs at the downstream fan. The wind speed calculated at that location, For upstream units The actual inflow velocity at the location.
[0117] This embodiment couples the dynamic area ratio as a multiplicative weighting coefficient into the energy conservation wake superposition model, so that the wake loss of each upstream unit is weighted and summed according to the actual physical interception amount. This can overcome the defect of the traditional superposition model that cannot distinguish the true contribution of each upstream unit under yaw conditions, and provide a calculation framework that conforms to the principle of energy conservation for the accurate solution of the inflow wind speed of the downstream unit.
[0118] This embodiment outputs the actual inflow wind speed of the downstream unit, which will be directly input into the active power control and fatigue uniform optimization control algorithm of the wind farm. This enables accurate calculation of the wake wind speed of the wind farm under yaw control conditions, while also taking into account the calculation of the wake center offset characteristics under the yaw condition of the unit. This can effectively improve the accuracy of the wake wind speed calculation of the wind farm and provide a reliable data model and calculation support for the active wake control strategy based on yaw angle optimization.
[0119] Example 2:
[0120] This embodiment provides a computer-readable storage medium storing a computer program / instruction. When the computer program / instruction is executed by a processor, it implements the steps of the wind farm wake wind speed calculation method under yaw control conditions as described in Embodiment 1.
[0121] Example 3:
[0122] This embodiment provides a computer device, including:
[0123] Memory, used to store computer programs / instructions;
[0124] A processor is used to execute the computer program / instructions to implement the steps of the wind farm wake wind speed calculation method under yaw control conditions as described in Embodiment 1.
[0125] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
[0126] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.
[0127] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.
[0128] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.
[0129] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.
Claims
1. A method for calculating the wake wind speed of a wind farm under yaw control conditions, characterized in that, include: Obtain the location coordinates and incoming wind direction data of each wind turbine in the wind farm; The position coordinates are transformed based on the incoming wind direction data, and the windward sequence of each unit along the incoming wind direction is determined based on the transformed coordinates. Obtain the yaw angle of the upstream unit in the windward sequence, and use the yaw wake model to update the center position of the wake influence area of the upstream unit in the rotor area of the downstream unit according to the yaw angle. Based on the updated center position, calculate the area of the overlapping region between the wake influence area and the downstream turbine rotor area, and determine the area ratio based on the overlapping area. Based on the overlapping area and area ratio, the final inflow wind speed of the downstream unit under yaw control conditions is calculated.
2. The method for calculating the wake wind speed of a wind farm under yaw control conditions according to claim 1, characterized in that, The process of transforming the position coordinates based on the incoming wind direction data and determining the windward sequence of each unit along the incoming wind direction based on the transformed coordinates includes: Taking due north as 0° and taking values sequentially in a clockwise direction, the coordinate system is rotated when the incoming wind direction changes. When the angle is adjusted, the position coordinates of each wind turbine are rotated and transformed, as expressed by the following formula: ， in, For the first The transformed position coordinates of the generator set. For the first Position coordinates of the generator set before the transformation. The angle by which the wind farm coordinate system is rotated due to the direction of the incoming wind; The transformed coordinates are arranged from largest to smallest according to the Y-axis coordinate values to determine the windward sequence of each unit under the current incoming wind direction.
3. The method for calculating the wake wind speed of a wind farm under yaw control conditions according to claim 1, characterized in that, The yaw wake model is the Jensen wake model. The wake radius and wake wind speed of the upstream unit in the rotor region of the downstream unit are calculated using the following formula: ， in, The wake radius of the upstream unit in the rotor region of the downstream unit. The radius of the wind turbine of the downstream unit. The wake attenuation factor, Let X be the diameter of the turbine rotor. The ratio, where X is the distance from the location where the wake wind speed is calculated to the upstream unit; The wind speed at the location used to calculate the wake wind speed. For the incoming wind speed, This is the thrust coefficient.
4. The method for calculating the wake wind speed of a wind farm under yaw control conditions according to claim 1, characterized in that, The method of using the yaw wake model to update the center position of the wake influence area of the upstream unit in the wind turbine area of the downstream unit according to the yaw angle includes: Obtaining the upstream units in the windward sequence With downstream units The relative positional relationship, wherein the relative positional relationship includes the distance between the two units. and the azimuth angles of the two units ; According to the upstream units in the windward sequence Yaw angle And the thrust coefficient, determine the offset of the wake centerline relative to the wake centerline under the non-yaw condition. ,in The deflection coefficient of the yaw wake; Based on offset The angle by which the wind farm coordinate system is rotated, taking into account the relative positional relationship and the direction of the incoming wind. The axial and radial distances of the downstream unit in the wake of the upstream unit are calculated and expressed by the following formula: ， in, For downstream units Upstream units The axial distance in the wake, For downstream units Upstream units The radial distance in the wake.
5. The method for calculating the wake wind speed of a wind farm under yaw control conditions according to claim 1, characterized in that, Under yaw control conditions, the output power of the wind turbine follows a cubic relationship with the maximum output power when yaw is not occurring, as expressed by the following formula: ， in, Yaw angle The output power of the wind turbine unit below This represents the maximum output power when yaw occurs.
6. The method for calculating the wake wind speed of a wind farm under yaw control conditions according to claim 1, characterized in that, Based on the updated center position, the overlapping area of the wake influence region and the downstream turbine rotor region is calculated, and the area ratio is determined according to the overlapping area, including: Determine the radial distance of the downstream unit in the wake of the upstream unit within the updated wake influence area. ; Based on radial distance The wake radius of the upstream unit in the rotor region of the downstream unit and the rotor radius of downstream units Determine the intersection state between the wake section and the downstream turbine rotor region; Under yaw control conditions, the wake section partially overlaps with the rotor region. This partial overlap includes... and Two scenarios: when When the overlapping area is reached, the area is calculated using the following formula: ， when When the overlapping area is reached, the area is calculated using the following formula: ， in, The area of the overlapping region. The vertical distance from the center of the downstream turbine rotor region to the common chord of the two circles is denoted as . It is half the length of the common chord of the two circles.
7. The method for calculating the wake wind speed of a wind farm under yaw control conditions according to claim 1, characterized in that, The area ratio is the ratio of the overlapping area to the area of the downstream turbine rotor region, expressed by the following formula: ， in, For downstream units Upstream units The area ratio in the wake.
8. The method for calculating the wake wind speed of a wind farm under yaw control conditions according to claim 1, characterized in that, The final inflow wind speed of the downstream unit under yaw control conditions, calculated based on the area and area ratio of the overlapping region, is expressed by the following formula: ， in, For downstream units The final inflow wind speed under yaw control conditions For the incoming wind speed, For downstream units Upstream units The area ratio in the wake, To consider only upstream wind turbines For downstream wind turbines The wake effect occurs at the downstream fan. The wind speed calculated at that location, For upstream units The actual inflow velocity at the location.
9. A computer-readable storage medium having a computer program / instructions stored thereon, characterized in that, When the computer program / instruction is executed by the processor, it implements the steps of the wind farm wake wind speed calculation method under yaw control conditions as described in any one of claims 1-8.
10. A computer device, characterized in that, include: Memory, used to store computer programs / instructions; A processor is configured to execute the computer program / instructions to implement the steps of the wind farm wake wind speed calculation method under yaw control conditions as described in any one of claims 1-8.