Method and system for determining rated wind speed of unit in wind farm

Abstract

This application proposes a method and system for determining the rated wind speed of turbine units within a wind farm. The method includes: obtaining the wind speed probability distribution and feasible wind speed domain for each wind turbine location within a preset period in the wind farm; determining the wind speed corresponding to the maximum probability value in the wind speed probability distribution within the preset period for each wind turbine location; and determining the rated wind speed of the wind turbine units at each wind turbine location within the wind farm based on the wind speed corresponding to the maximum probability value in the wind speed probability distribution within the preset period for each wind turbine location and the feasible wind speed domain for each wind turbine location. The technical solution proposed in this application calculates the required rated wind speed for turbine units at different locations based on the wind speed distribution at different locations, thereby selecting turbine units with different rated wind speeds, effectively improving wind energy utilization efficiency.

Description

Technical Field

[0001] This application relates to the field of rated wind speed determination, and in particular to a method and system for determining the rated wind speed of turbines in a wind farm. Background Technology

[0002] The selection of wind turbines in a wind farm is based on the projected total scale of the wind farm and local wind conditions, calculating the turbine selection scheme that minimizes cost and maximizes power generation. However, for the sake of convenience in procurement and low prices from bulk purchases, wind farms often use the same type of turbines with the same rated wind speed parameters.

[0003] Under the existing technical solutions, although using the same model of turbines in the same wind farm can reduce procurement costs, the wind speed distribution at different locations in the actual operation of the wind farm is not the same. As a result, the wind turbines at most locations cannot reach their designed rated wind speed for most of the year, resulting in low wind energy utilization efficiency. Summary of the Invention

[0004] This application provides a method and system for determining the rated wind speed of wind turbines in a wind farm, in order to at least solve the technical problem that wind turbines at most locations cannot reach their designed rated wind speed for most of the year, resulting in low wind energy utilization efficiency.

[0005] The first aspect of this application proposes a method for determining the rated wind speed of turbine units in a wind farm, the method comprising:

[0006] Obtain the wind speed probability distribution and the wind speed feasible region of each wind turbine location within a preset period in the wind farm.

[0007] Determine the wind speed corresponding to the maximum probability value in the wind speed probability distribution of each wind turbine location within a preset period;

[0008] The rated wind speed of the wind turbine units at each wind turbine location within the wind farm is determined based on the wind speed corresponding to the maximum probability value in the wind speed probability distribution within a preset period for each wind turbine location and the feasible wind speed region for each wind turbine location.

[0009] Preferably, the feasible wind speed region at the i-th wind turbine location in the wind farm is {vin}. i ,vin i +1,vin i +2,...,vout i};

[0010] Among them, vin i vout is the cut-in wind speed of wind turbine location i in the wind farm, and vout is the cut-out wind speed of wind turbine location i in the wind farm.

[0011] i∈[1~N], where N is the total number of wind turbine locations in the wind farm.

[0012] Furthermore, determining the rated wind speed of the wind turbine units at each wind turbine location within the wind farm based on the wind speed corresponding to the maximum probability value in the wind speed probability distribution within a preset period for each wind turbine location and the feasible wind speed region for each wind turbine location includes:

[0013] Based on the feasible wind speed domain of each wind turbine location, the wind speed corresponding to the maximum probability value in the wind speed probability distribution within the preset period of each wind turbine location is optimized to obtain the initial rated wind speed of the wind turbine unit at each wind turbine location.

[0014] The rated wind speed of the wind turbines at each wind turbine location is determined based on the initial rated wind speed of the wind turbines at each wind turbine location and the cut-in and cut-out wind speeds in the feasible wind speed domain of each wind turbine location.

[0015] Furthermore, determining the rated wind speed of the wind turbines at each wind turbine location within the wind farm based on the initial rated wind speed of the wind turbines at each wind turbine location and the cut-in and cut-out wind speeds within the feasible wind speed domain at each wind turbine location includes:

[0016] When the number of the wind turbine location is 1, the initial rated wind speed of the wind turbine at the wind turbine location shall be taken as the rated wind speed of the wind turbine at the wind turbine location.

[0017] When the number of the wind turbine location is greater than 1, the rated wind speed of the wind turbine at each wind turbine location is determined based on the initial rated wind speed of the wind turbine at each wind turbine location, the rated wind speed of the wind turbine at the wind turbine location with the previous number, and the cut-in wind speed and cut-out wind speed in the feasible wind speed domain of each wind turbine location.

[0018] Furthermore, when the number of the wind turbine location is greater than 1, the formula for calculating the rated wind speed of the wind turbine unit at the i-th wind turbine location is as follows:

[0019]

[0020] In the formula, vnom i Let vwindmax be the rated wind speed of the wind turbine at the i-th wind turbine location. i Let vnom be the initial rated wind speed of the wind turbine at the i-th wind turbine location. j Let be the rated wind speed of the wind turbine unit at the j-th wind turbine location.

[0021] A second aspect of this application provides a system for determining the rated wind speed of turbine units in a wind farm, the system comprising:

[0022] The acquisition module is used to acquire the wind speed probability distribution of each wind turbine location within a preset period and the feasible wind speed domain of each wind turbine location within the wind farm.

[0023] The first determining module is used to determine the wind speed corresponding to the maximum probability value in the wind speed probability distribution of each wind turbine location within a preset period.

[0024] The second determining module is used to determine the rated wind speed of the wind turbine units at each wind turbine location in the wind farm based on the wind speed corresponding to the maximum probability value in the wind speed probability distribution within a preset period of each wind turbine location and the feasible wind speed region of each wind turbine location.

[0025] Preferably, the feasible wind speed region at the i-th wind turbine location in the wind farm is {vin}. i ,vin i +1,vin i +2,...,vout i};

[0026] Among them, vin i vout is the cut-in wind speed of wind turbine location i in the wind farm, and vout is the cut-out wind speed of wind turbine location i in the wind farm.

[0027] i∈[1~N], where N is the total number of wind turbine locations in the wind farm.

[0028] Furthermore, the second determining module includes:

[0029] The optimization unit is used to optimize the wind speed corresponding to the maximum probability value in the wind speed probability distribution within a preset period of each wind turbine location based on the feasible wind speed domain of each wind turbine location, so as to obtain the initial rated wind speed of the wind turbine unit at each wind turbine location.

[0030] The first determining unit is used to determine the rated wind speed of the wind turbine at each wind turbine location within the wind farm based on the initial rated wind speed of the wind turbine at each wind turbine location and the cut-in wind speed and cut-out wind speed in the feasible wind speed domain of each wind turbine location.

[0031] Furthermore, the first determining unit is used to:

[0032] When the number of the wind turbine location is 1, the initial rated wind speed of the wind turbine at the wind turbine location shall be taken as the rated wind speed of the wind turbine at the wind turbine location.

[0033] When the number of the wind turbine location is greater than 1, the rated wind speed of the wind turbine at each wind turbine location is determined based on the initial rated wind speed of the wind turbine at each wind turbine location, the rated wind speed of the wind turbine at the wind turbine location with the previous number, and the cut-in wind speed and cut-out wind speed in the feasible wind speed domain of each wind turbine location.

[0034] Furthermore, when the number of the wind turbine location is greater than 1, the formula for calculating the rated wind speed of the wind turbine unit at the i-th wind turbine location is as follows:

[0035]

[0036] In the formula, vnom i Let vwindmax be the rated wind speed of the wind turbine at the i-th wind turbine location. i Let vnom be the initial rated wind speed of the wind turbine at the i-th wind turbine location. j Let be the rated wind speed of the wind turbine unit at the j-th wind turbine location.

[0037] The technical solutions provided by the embodiments of this application bring at least the following beneficial effects:

[0038] This application proposes a method and system for determining the rated wind speed of turbine units within a wind farm. The method includes: obtaining the wind speed probability distribution and feasible wind speed domain for each wind turbine location within a preset period in the wind farm; determining the wind speed corresponding to the maximum probability value in the wind speed probability distribution within the preset period for each wind turbine location; and determining the rated wind speed of the wind turbine units at each wind turbine location within the wind farm based on the wind speed corresponding to the maximum probability value in the wind speed probability distribution within the preset period for each wind turbine location and the feasible wind speed domain for each wind turbine location. The technical solution proposed in this application calculates the required rated wind speed for turbine units at different locations based on the wind speed distribution at different locations, thereby selecting turbine units with different rated wind speeds, effectively improving wind energy utilization efficiency.

[0039] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0040] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0041] Figure 1 This is a flowchart illustrating a method for determining the rated wind speed of a turbine in a wind farm, according to an embodiment of this application.

[0042] Figure 2 This is a structural diagram of a system for determining the rated wind speed of a turbine in a wind farm, according to an embodiment of this application.

[0043] Figure 3 This is a structural diagram of a second determining module provided according to an embodiment of this application. Detailed Implementation

[0044] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0045] This application proposes a method and system for determining the rated wind speed of turbine units within a wind farm. The method includes: obtaining the wind speed probability distribution and feasible wind speed domain for each wind turbine location within a preset period in the wind farm; determining the wind speed corresponding to the maximum probability value in the wind speed probability distribution within the preset period for each wind turbine location; and determining the rated wind speed of the wind turbine units at each wind turbine location based on the wind speed corresponding to the maximum probability value in the wind speed probability distribution within the preset period for each wind turbine location and the feasible wind speed domain for each wind turbine location. The technical solution proposed in this application calculates the required rated wind speed for turbine units at different locations based on the wind speed distribution at different locations, thereby selecting turbine units with different rated wind speeds, effectively improving wind energy utilization efficiency.

[0046] The following describes, with reference to the accompanying drawings, a method and system for determining the rated wind speed of turbines in a wind farm according to an embodiment of this application.

[0047] Example 1

[0048] Figure 1 This is a flowchart illustrating a method for determining the rated wind speed of a wind turbine in a wind farm, according to an embodiment of this application. Figure 1 As shown, the method includes:

[0049] Step 1: Obtain the wind speed probability distribution and the feasible wind speed domain of each wind turbine location within a preset period in the wind farm.

[0050] It should be noted that the preset period can be one year;

[0051] The feasible region of wind speed at the i-th wind turbine location in the wind farm is {vin} i ,vin i +1,vin i +2,...,vout i};

[0052] Among them, vin i vout is the cut-in wind speed of wind turbine location i in the wind farm, and vout is the cut-out wind speed of wind turbine location i in the wind farm.

[0053] i∈[1~N], where N is the total number of wind turbine locations in the wind farm;

[0054] All values ​​within the feasible wind speed range are integers.

[0055] Step 2: Determine the wind speed corresponding to the maximum probability value in the wind speed probability distribution within the preset period for each wind turbine location;

[0056] Step 3: Determine the rated wind speed of the wind turbine units at each wind turbine location within the wind farm based on the wind speed corresponding to the maximum probability value in the wind speed probability distribution within the preset period for each wind turbine location and the feasible wind speed region for each wind turbine location.

[0057] In this embodiment of the disclosure, step 3 specifically includes:

[0058] Step 3-1: Based on the feasible wind speed domain of each wind turbine location, optimize the wind speed corresponding to the maximum probability value in the wind speed probability distribution within the preset period of each wind turbine location to obtain the initial rated wind speed of the wind turbine unit at each wind turbine location.

[0059] It should be noted that when the wind speed corresponding to the maximum probability is not an integer, the wind speed corresponding to the maximum probability needs to be optimized based on the value within the feasible region. For example, if the wind speed corresponding to the maximum probability is 6.3, it is between 6 and 7 in the feasible region, but it is closer to 6, so the wind speed corresponding to the maximum probability is optimized to 6.

[0060] Step 3-2: Determine the rated wind speed of the wind turbines at each wind turbine location based on the initial rated wind speed of the wind turbines at each wind turbine location and the cut-in and cut-out wind speeds in the feasible wind speed domain of each wind turbine location.

[0061] Furthermore, step 3-2 specifically includes:

[0062] When the number of the wind turbine location is 1, the initial rated wind speed of the wind turbine at the wind turbine location shall be taken as the rated wind speed of the wind turbine at the wind turbine location.

[0063] When the number of the wind turbine location is greater than 1, the rated wind speed of the wind turbine at each wind turbine location is determined based on the initial rated wind speed of the wind turbine at each wind turbine location, the rated wind speed of the wind turbine at the wind turbine location with the previous number, and the cut-in wind speed and cut-out wind speed in the feasible wind speed domain of each wind turbine location.

[0064] When the number of the wind turbine location is greater than 1, the formula for calculating the rated wind speed of the wind turbine unit at the i-th wind turbine location is as follows:

[0065]

[0066] In the formula, vnom i Let vwindmax be the rated wind speed of the wind turbine at the i-th wind turbine location. i Let vnom be the initial rated wind speed of the wind turbine at the i-th wind turbine location.j Let be the rated wind speed of the wind turbine unit at the j-th wind turbine location.

[0067] To more clearly illustrate the implementation process of a method for determining the rated wind speed of a wind turbine in a wind farm according to an embodiment of this application, a specific method embodiment will be described in detail below:

[0068] 1) Mark the locations of wind turbines in the wind farm as 1-N, which correspond to wind turbine units No. 1-N;

[0069] 2) Based on the wind measurement tower data, input the wind speed probability distribution p1(vwind)-pN(vwind) within a preset period for N points, where the feasible region of wind speed at the i-th wind turbine location in the wind farm is {vin i ,vin i +1,vin i +2,...,vout i};

[0070] 3) Let i = 1;

[0071] 4) Calculate the rated wind speed value vnom required for the i-th wind turbine. i :

[0072] When the number of the wind turbine location is 1, vnom1 = vwindmax1;

[0073] When the number of the wind turbine location is greater than 1,

[0074] Among them, vwindmax i Let be the initial rated wind speed of the wind turbine unit at the i-th wind turbine location;

[0075] 5) Determine if i is less than or equal to N. If yes, let i = i + 1 and return to 4); otherwise, proceed to 6).

[0076] 6) The calculation is complete. Output the rated wind speed of the 1-N wind turbine units at this time.

[0077] In summary, the method for determining the rated wind speed of turbines in a wind farm proposed in this embodiment calculates the rated wind speed that turbines at different locations should possess based on the wind speed distribution within a period at different points in the wind farm, thereby selecting turbines with different rated wind speeds and effectively improving the overall wind energy utilization efficiency during the operation of the wind farm.

[0078] Example 2

[0079] Figure 2 This is a structural diagram of a system for determining the rated wind speed of a wind turbine in a wind farm, according to an embodiment of this application. Figure 2As shown, the system includes:

[0080] The acquisition module 100 is used to acquire the wind speed probability distribution of each wind turbine location within a preset period and the feasible wind speed domain of each wind turbine location within the wind farm.

[0081] The first determining module 200 is used to determine the wind speed corresponding to the maximum probability value in the wind speed probability distribution of each wind turbine location within a preset period.

[0082] The second determining module 300 is used to determine the rated wind speed of the wind turbine unit at each wind turbine location in the wind farm based on the wind speed corresponding to the maximum probability value in the wind speed probability distribution within a preset period of each wind turbine location and the feasible wind speed region of each wind turbine location.

[0083] In this embodiment of the disclosure, the feasible region of wind speed at the i-th wind turbine location in the wind farm is {vin}. i ,vin i +1,vin i +2,...,vout i};

[0084] Among them, vin i vout is the cut-in wind speed of wind turbine location i in the wind farm, and vout is the cut-out wind speed of wind turbine location i in the wind farm.

[0085] i∈[1~N], where N is the total number of wind turbine locations in the wind farm.

[0086] In the embodiments disclosed herein, such as Figure 3 As shown, the second determining module 300 includes:

[0087] The optimization unit 301 is used to optimize the wind speed corresponding to the maximum probability value in the wind speed probability distribution within a preset period of each wind turbine location based on the wind speed feasible domain of each wind turbine location, so as to obtain the initial rated wind speed of the wind turbine unit at each wind turbine location.

[0088] The first determining unit 302 is used to determine the rated wind speed of the wind turbine at each wind turbine location within the wind farm based on the initial rated wind speed of the wind turbine at each wind turbine location and the cut-in wind speed and cut-out wind speed in the feasible wind speed domain of each wind turbine location.

[0089] Furthermore, the first determining unit 302 is used for:

[0090] When the number of the wind turbine location is 1, the initial rated wind speed of the wind turbine at the wind turbine location shall be taken as the rated wind speed of the wind turbine at the wind turbine location.

[0091] When the number of the wind turbine location is greater than 1, the rated wind speed of the wind turbine at each wind turbine location is determined based on the initial rated wind speed of the wind turbine at each wind turbine location, the rated wind speed of the wind turbine at the wind turbine location with the previous number, and the cut-in wind speed and cut-out wind speed in the feasible wind speed domain of each wind turbine location.

[0092] Wherein, when the number of the wind turbine location is greater than 1, the formula for calculating the rated wind speed of the wind turbine unit at the i-th wind turbine location is as follows:

[0093]

[0094] In the formula, vnom i Let vwindmax be the rated wind speed of the wind turbine at the i-th wind turbine location. i Let vnom be the initial rated wind speed of the wind turbine at the i-th wind turbine location. j Let be the rated wind speed of the wind turbine unit at the j-th wind turbine location.

[0095] In summary, the system for determining the rated wind speed of turbines in a wind farm proposed in this embodiment calculates the rated wind speed required for turbines at different locations based on the periodic wind speed distribution at different points in the wind farm, thereby selecting turbines with different rated wind speeds and effectively improving the overall wind energy utilization efficiency during wind farm operation.

[0096] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0097] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0098] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for determining the rated wind speed of turbine units in a wind farm, characterized in that, The method includes: Obtain the wind speed probability distribution and the wind speed feasible region of each wind turbine location within a preset period in the wind farm. Determine the wind speed corresponding to the maximum probability value in the wind speed probability distribution of each wind turbine location within a preset period; The rated wind speed of the wind turbine units at each wind turbine location within the wind farm is determined based on the wind speed corresponding to the maximum probability value in the wind speed probability distribution within the preset period of each wind turbine location and the feasible wind speed region of each wind turbine location. The step of determining the rated wind speed of the wind turbine units at each wind turbine location within the wind farm based on the wind speed corresponding to the maximum probability value in the wind speed probability distribution within a preset period for each wind turbine location and the feasible wind speed region for each wind turbine location includes: Based on the feasible wind speed domain of each wind turbine location, the wind speed corresponding to the maximum probability value in the wind speed probability distribution within the preset period of each wind turbine location is optimized to obtain the initial rated wind speed of the wind turbine unit at each wind turbine location. When the number of the wind turbine location is 1, the initial rated wind speed of the wind turbine at the wind turbine location shall be taken as the rated wind speed of the wind turbine at the wind turbine location. When the number of the wind turbine location is greater than 1, the rated wind speed of the wind turbine at the wind turbine location is determined based on the initial rated wind speed of the wind turbine at each wind turbine location, the rated wind speed of the wind turbine at the wind turbine location with the previous number, and the cut-in wind speed and cut-out wind speed in the feasible wind speed domain of each wind turbine location. When the number of the wind turbine location is greater than 1, the formula for calculating the rated wind speed of the wind turbine unit at the i-th wind turbine location is as follows: In the formula, Let be the rated wind speed of the wind turbine unit at the i-th wind turbine location. Let be the initial rated wind speed of the wind turbine unit at the i-th wind turbine location. Let be the rated wind speed of the wind turbine unit at the j-th wind turbine location.

2. The method as described in claim 1, characterized in that, The feasible region of wind speed at the i-th wind turbine location in the wind farm is {vin} i vin i +1, vin i +2,...,vout i }; where vin i is the cut-in wind speed of the fan point numbered i in the wind farm, and vout is the cut-out wind speed of the fan point numbered i in the wind farm; , This represents the total number of wind turbine locations in the wind farm.

3. A system for determining the rated wind speed of turbine units in a wind farm, characterized in that, The system includes: The acquisition module is used to acquire the wind speed probability distribution of each wind turbine location within a preset period and the feasible wind speed domain of each wind turbine location within the wind farm. The first determining module is used to determine the wind speed corresponding to the maximum probability value in the wind speed probability distribution of each wind turbine location within a preset period. The second determining module is used to determine the rated wind speed of the wind turbine unit at each wind turbine location in the wind farm based on the wind speed corresponding to the maximum probability value in the wind speed probability distribution within a preset period of each wind turbine location and the feasible wind speed region of each wind turbine location. The second determining module includes: The optimization unit is used to optimize the wind speed corresponding to the maximum probability value in the wind speed probability distribution within a preset period of each wind turbine location based on the feasible wind speed domain of each wind turbine location, so as to obtain the initial rated wind speed of the wind turbine unit at each wind turbine location. The first determining unit is used for: When the number of the wind turbine location is 1, the initial rated wind speed of the wind turbine at the wind turbine location shall be taken as the rated wind speed of the wind turbine at the wind turbine location. When the number of the wind turbine location is greater than 1, the rated wind speed of the wind turbine at the wind turbine location is determined based on the initial rated wind speed of the wind turbine at each wind turbine location, the rated wind speed of the wind turbine at the wind turbine location with the previous number, and the cut-in wind speed and cut-out wind speed in the feasible wind speed domain of each wind turbine location. When the number of the wind turbine location is greater than 1, the formula for calculating the rated wind speed of the wind turbine unit at the i-th wind turbine location is as follows: In the formula, Let be the rated wind speed of the wind turbine unit at the i-th wind turbine location. Let be the initial rated wind speed of the wind turbine unit at the i-th wind turbine location. Let be the rated wind speed of the wind turbine unit at the j-th wind turbine location.

4. The system as described in claim 3, characterized in that, The feasible region of wind speed at the i-th wind turbine location in the wind farm is {vin} i vin i +1, vin i +2,...,vout i }; Among them, vin i vout is the cut-in wind speed of wind turbine location i in the wind farm, and vout is the cut-out wind speed of wind turbine location i in the wind farm. , This represents the total number of wind turbine locations in the wind farm.

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