A wind turbine generator capacity reduction control method and system, an electronic device, and a storage medium

Abstract

The application provides a wind turbine capacity reduction control method, system, electronic equipment and storage medium. The method comprises the following steps: acquiring the required output rotating speed of a wind turbine and an initial rotating speed-torque curve when the wind turbine is cooled; determining the corrected torque of the wind turbine according to the required output rotating speed of the wind turbine; correcting the initial rotating speed-torque curve according to the corrected torque of the wind turbine to obtain a corrected rotating speed-torque curve; and controlling the wind turbine to reduce the power generation capacity based on the corrected rotating speed-torque curve. The technical scheme provided by the application uses the corrected rotating speed-torque curve to meet the cooling requirement by reducing the rotating speed in the wind turbine, and compared with the original rotating speed-torque curve, the power generation capacity of the unit is obviously improved, and the power generation loss under the cooling requirement can be effectively reduced.

Description

Technical Field

[0001] This application relates to the field of wind turbine control, and more particularly to a wind turbine derating control method, system, electronic device and storage medium. Background Technology

[0002] The heat generated by components such as gearbox oil and bearings in wind turbine generators is positively correlated with generator speed. When component temperatures are too high, the cooling system's heat dissipation capacity reaches its maximum. At this point, it is necessary to reduce the generator speed to effectively lower the component temperatures. To reduce the generator speed, the unit needs to be reduced to the optimal tip speed ratio range according to the generator speed-torque curve. However, the generator's power generation capacity is typically below 50% of its rated capacity in the optimal tip speed ratio range. Therefore, using conventional capacity reduction methods to lower the temperature of components such as gearbox oil and bearings will result in significant power generation losses. Summary of the Invention

[0003] This application provides a wind turbine derating control method, system, electronic equipment, and storage medium to at least solve the technical problem that conventional derating methods result in significant power generation losses.

[0004] The first aspect of this application provides a method for derating control of wind turbine generators, the method comprising:

[0005] Obtain the required output speed of the generator set and the initial speed-torque curve when the wind turbine is cooling down;

[0006] The corrected torque of the generator set is determined based on the required output speed of the generator set;

[0007] The initial speed-torque curve is corrected based on the corrected torque of the generator set to obtain the corrected speed-torque curve;

[0008] The wind turbine is controlled to reduce its power generation capacity based on the modified speed-torque curve.

[0009] Preferably, determining the corrected torque of the generator set based on the required output speed of the generator set includes:

[0010] Determine the speed range to which the required output speed of the generator set belongs;

[0011] The corrected torque of the generator set is determined based on the speed range to which the speed belongs.

[0012] Furthermore, determining the corrected torque of the generator set based on the speed range to which the speed belongs includes:

[0013] When the speed range to which the specified speed belongs is the first speed range, the corrected torque of the generator set is determined to be... ,in, This represents the gain for the optimal tip speed ratio segment of a wind turbine. This refers to the required output speed of the generator set;

[0014] When the speed range to which the specified speed belongs is the second speed range, the corrected torque of the generator set is determined to be... ,in, This is the lower limit of the generator set's speed. This is the generator's rated speed. This is the generator's rated torque. This is the lower limit of the generator set's torque.

[0015] When the speed range to which the specified speed belongs is the third speed range, the corrected torque of the generator set is determined to be... ;

[0016] The first speed range includes: greater than or equal to zero and less than the lower limit of the generator set speed;

[0017] The second speed range includes: greater than or equal to the lower limit of the generator set's speed and less than the generator's rated speed;

[0018] The third speed range includes speeds greater than or equal to the generator's rated speed.

[0019] Furthermore, the step of correcting the initial speed-torque curve based on the corrected torque of the generator set to obtain the corrected speed-torque curve includes:

[0020] The torque value corresponding to the required output speed of the generator set in the initial speed-torque curve is modified to the corrected torque value of the generator set, and then the curve is connected to obtain the corrected speed-torque curve.

[0021] Preferably, controlling the wind turbine to reduce its power generation capacity based on the modified speed-torque curve includes:

[0022] The required reduction in power generation capacity reference value is determined based on the revised speed-torque curve.

[0023] Based on the power generation capacity reference value, the power generation capacity of the wind turbine is controlled to decrease to the power generation capacity reference value.

[0024] A second aspect of this application provides a derating control system for wind turbine generators, comprising:

[0025] The acquisition module is used to acquire the required output speed of the generator set and the initial speed-torque curve when the wind turbine is cooling down;

[0026] The determination module is used to determine the corrected torque of the generator set based on the required output speed of the generator set;

[0027] The correction module is used to correct the initial speed-torque curve according to the correction torque of the generator set, so as to obtain the corrected speed-torque curve.

[0028] The control module is used to control the wind turbine to reduce its power generation capacity based on the modified speed-torque curve.

[0029] Preferably, the determining module includes:

[0030] The first determining unit is used to determine the speed range to which the required output speed of the generator set belongs;

[0031] The second determining unit is used to determine the corrected torque of the generator set based on the speed range to which the speed belongs.

[0032] Furthermore, the second determining unit is also used for:

[0033] When the speed range to which the specified speed belongs is the first speed range, the corrected torque of the generator set is determined to be... ,in, This represents the gain for the optimal tip speed ratio segment of a wind turbine. This refers to the required output speed of the generator set;

[0034] When the speed range to which the specified speed belongs is the second speed range, the corrected torque of the generator set is determined to be... ,in, This is the lower limit of the generator set's speed. This is the generator's rated speed. This is the generator's rated torque. This is the lower limit of the generator set's torque.

[0035] When the speed range to which the specified speed belongs is the third speed range, the corrected torque of the generator set is determined to be... ;

[0036] The first speed range includes: greater than or equal to zero and less than the lower limit of the generator set speed;

[0037] The second speed range includes: greater than or equal to the lower limit of the generator set's speed and less than the generator's rated speed;

[0038] The third speed range includes speeds greater than or equal to the generator's rated speed.

[0039] A third aspect of this application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, it implements the method described in the first aspect embodiment.

[0040] A fourth aspect of this application provides a computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the method described in the first aspect.

[0041] The technical solutions provided by the embodiments of this application bring at least the following beneficial effects:

[0042] This application proposes a method, system, electronic device, and storage medium for derating wind turbine generators. The method includes: acquiring the required output speed of the generator set and an initial speed-torque curve during cooling; determining the corrected torque of the generator set based on the required output speed; correcting the initial speed-torque curve based on the corrected torque to obtain a corrected speed-torque curve; and controlling the wind turbine generator to reduce its power generation capacity based on the corrected speed-torque curve. The technical solution proposed in this application addresses the need for cooling in wind turbine generators by reducing their speed. By using the corrected speed-torque curve, the power generation capacity of the generator is significantly increased compared to using the original speed-torque curve, effectively reducing power generation losses under such cooling requirements.

[0043] 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

[0044] 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:

[0045] Figure 1 This is a flowchart of a wind turbine derating control method according to an embodiment of this application;

[0046] Figure 2 This is a schematic diagram of a speed-torque curve provided according to an embodiment of this application;

[0047] Figure 3 This is a structural diagram of a wind turbine derating control system according to an embodiment of this application;

[0048] Figure 4 This is a structural diagram of a determining module provided according to an embodiment of this application;

[0049] Figure 5This is a structural diagram of a control module provided according to an embodiment of this application. Detailed Implementation

[0050] 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.

[0051] This application proposes a method, system, electronic device, and storage medium for controlling the derating of wind turbine generators. The method includes: acquiring the required output speed of the generator set and an initial speed-torque curve during cooling; determining the corrected torque of the generator set based on the required output speed; correcting the initial speed-torque curve based on the corrected torque to obtain a corrected speed-torque curve; and controlling the wind turbine generator to reduce its power generation capacity based on the corrected speed-torque curve. The technical solution proposed in this application addresses the need for wind turbine generators to reduce speed to meet cooling requirements. By using the corrected speed-torque curve, the power generation capacity of the generator set is significantly increased compared to using the original speed-torque curve, effectively reducing power generation losses under such cooling requirements.

[0052] The following description, with reference to the accompanying drawings, describes a wind turbine derating control method, system, electronic device, and storage medium according to embodiments of this application.

[0053] Example 1

[0054] Figure 1 The flowchart below shows a wind turbine derating control method according to an embodiment of this application. Figure 1 As shown, the method includes:

[0055] Step 1: Obtain the required output speed of the generator set and the initial speed-torque curve when the wind turbine is cooling down.

[0056] It should be noted that the heat generated by components such as gearbox oil and bearings in wind turbines is positively correlated with the generator speed. When the component temperature is too high, the heat dissipation capacity of the cooling system has reached its maximum. At this time, it is necessary to reduce the generator speed to effectively reduce the component temperature.

[0057] Step 2: Determine the corrected torque of the generator set based on the required output speed of the generator set.

[0058] In this embodiment of the disclosure, step 2 specifically includes:

[0059] Step 2-1: Determine the speed range to which the required output speed of the generator set belongs;

[0060] Step 2-2: Determine the corrected torque of the generator set according to the speed range to which the speed belongs.

[0061] Furthermore, step 2-2 includes:

[0062] When the speed range to which the specified speed belongs is the first speed range, the corrected torque of the generator set is determined to be... ,in, This represents the gain for the optimal tip speed ratio segment of a wind turbine. This refers to the required output speed of the generator set;

[0063] When the speed range to which the specified speed belongs is the second speed range, the corrected torque of the generator set is determined to be... ,in, This is the lower limit of the generator set's speed. This is the generator's rated speed. This is the generator's rated torque. This is the lower limit of the generator set's torque.

[0064] When the speed range to which the specified speed belongs is the third speed range, the corrected torque of the generator set is determined to be... ;

[0065] The first speed range includes: greater than or equal to zero and less than the lower limit of the generator set speed;

[0066] The second speed range includes: greater than or equal to the lower limit of the generator set's speed and less than the generator's rated speed;

[0067] The third speed range includes speeds greater than or equal to the generator's rated speed.

[0068] Step 3: Correct the initial speed-torque curve according to the corrected torque of the generator set to obtain the corrected speed-torque curve.

[0069] In this embodiment of the disclosure, step 3 specifically includes:

[0070] The torque value corresponding to the required output speed of the generator set in the initial speed-torque curve is modified to the corrected torque value of the generator set, and then the curve is connected to obtain the corrected speed-torque curve.

[0071] Step 4: Control the wind turbine to reduce its power generation capacity based on the corrected speed-torque curve.

[0072] In this embodiment of the disclosure, step 4 specifically includes:

[0073] Step 4-1: Determine the reference value for the required reduction in power generation capacity based on the corrected speed-torque curve;

[0074] Step 4-2: Based on the power generation capacity reference value, control the power generation capacity of the wind turbine to decrease to the power generation capacity reference value.

[0075] Specifically, based on the wind turbine design parameters, the minimum generator speed Generator rated speed Generator rated torque Optimal tip speed ratio gain The corrected generator speed-torque curve is obtained by following these steps:

[0076] 1. Due to factors such as the allowable operating range of the converter and the stall of the wind turbine blades, the generator torque of the wind turbine is limited at various speeds. Therefore, the lower limit of the speed at which the generator torque and speed are synchronized can be obtained. Therefore, the maximum generator torque at each speed satisfies the following condition.

[0077] (1)

[0078] 2. Adjust the generator speed setting value based on component temperature. The generator torque setpoint is calculated using the formula in section 1. The reduced power generation capacity of the unit ;

[0079] 3. The unit's speed-torque curve has changed from the original ABCD to an ABC curve corrected based on component temperature regulation. rt -D rt ,like Figure 2 As shown;

[0080] 4. The power generation capacity based on the derating method according to the initial speed-torque curve is:

[0081]

[0082] 5. When using the derating method based on the modified speed-torque curve, the increase in generator capacity compared to the initial curve is... As follows, Figure 2 medium curve C rt -D rt part

[0083]

[0084] As can be seen from the above, using the modified speed-torque curve significantly improves the unit's power generation capacity compared to using the original speed-torque curve.

[0085] In summary, the wind turbine derating control method proposed in this embodiment addresses the need for wind turbines to reduce speed to meet cooling requirements. By using a modified speed-torque curve, the power generation capacity of the turbine is significantly improved compared to the original speed-torque curve, effectively reducing power generation losses under such cooling requirements.

[0086] Example 2

[0087] Figure 3 This is a structural diagram of a wind turbine derating control system according to an embodiment of this application, as shown below. Figure 3 As shown, the system includes:

[0088] The acquisition module 100 is used to acquire the required output speed of the generator set and the initial speed-torque curve when the wind turbine is cooling down;

[0089] The determining module 200 is used to determine the corrected torque of the generator set based on the required output speed of the generator set;

[0090] The correction module 300 is used to correct the initial speed-torque curve according to the correction torque of the generator set to obtain the corrected speed-torque curve.

[0091] The control module 400 is used to control the wind turbine to reduce its power generation capacity based on the modified speed-torque curve.

[0092] In the embodiments disclosed herein, such as Figure 4 As shown, the determining module 200 includes:

[0093] The first determining unit 201 is used to determine the speed range to which the required output speed of the generator set belongs;

[0094] The second determining unit 202 is used to determine the corrected torque of the generator set according to the speed range to which the speed belongs.

[0095] Furthermore, the second determining unit 202 is also used for:

[0096] When the speed range to which the specified speed belongs is the first speed range, the corrected torque of the generator set is determined to be... ,in, This represents the gain for the optimal tip speed ratio segment of a wind turbine. This refers to the required output speed of the generator set;

[0097] When the speed range to which the specified speed belongs is the second speed range, the corrected torque of the generator set is determined to be... ,in, This is the lower limit of the generator set's speed. This is the generator's rated speed. This is the generator's rated torque. This is the lower limit of the generator set's torque.

[0098] When the speed range to which the specified speed belongs is the third speed range, the corrected torque of the generator set is determined to be... ;

[0099] The first speed range includes: greater than or equal to zero and less than the lower limit of the generator set speed;

[0100] The second speed range includes: greater than or equal to the lower limit of the generator set's speed and less than the generator's rated speed;

[0101] The third speed range includes speeds greater than or equal to the generator's rated speed.

[0102] In this embodiment of the disclosure, the correction module 300 is specifically used for:

[0103] The torque value corresponding to the required output speed of the generator set in the initial speed-torque curve is modified to the corrected torque value of the generator set, and then the curve is connected to obtain the corrected speed-torque curve.

[0104] In the embodiments disclosed herein, such as Figure 5 As shown, the control module 400 includes:

[0105] The third determining unit 401 is used to determine the reference value of the power generation capacity to be reduced according to the modified speed-torque curve.

[0106] Control unit 402 is used to control the power generation capacity of the wind turbine to decrease to the power generation capacity reference value based on the power generation capacity reference value.

[0107] In summary, the wind turbine derating control system proposed in this embodiment addresses the need for wind turbines to reduce speed to meet cooling requirements. By using a modified speed-torque curve, the power generation capacity of the turbine is significantly increased compared to the original speed-torque curve, effectively reducing power generation losses under such cooling requirements.

[0108] Example 3

[0109] To implement the above embodiments, this disclosure also proposes an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, it implements the method described in Embodiment 1.

[0110] Example 4

[0111] To implement the above embodiments, this disclosure also proposes a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method described in Embodiment 1.

[0112] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is 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.

[0113] 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.

[0114] 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 derating wind turbine generators, characterized in that, The method includes: Obtain the required output speed of the generator set and the initial speed-torque curve when the wind turbine is cooling down; The corrected torque of the generator set is determined based on the required output speed of the generator set; The initial speed-torque curve is corrected based on the corrected torque of the generator set to obtain the corrected speed-torque curve; The wind turbine is controlled to reduce its power generation capacity based on the modified speed-torque curve. Determining the corrected torque of the generator set based on the required output speed of the generator set includes: Determine the speed range to which the required output speed of the generator set belongs; The corrected torque of the generator set is determined based on the speed range to which the speed belongs; Determining the corrected torque of the generator set based on the speed range to which the speed belongs includes: When the speed range to which the specified speed belongs is the first speed range, the corrected torque of the generator set is determined to be... ,in, This represents the gain for the optimal tip speed ratio segment of a wind turbine. This refers to the required output speed of the generator set; When the speed range to which the specified speed belongs is the second speed range, the corrected torque of the generator set is determined to be... ,in, This is the lower limit of the generator set's speed. This is the generator's rated speed. This is the generator's rated torque. This is the lower limit of the generator set's torque. When the speed range to which the specified speed belongs is the third speed range, the corrected torque of the generator set is determined to be... ; The first speed range includes: greater than or equal to zero and less than the lower limit of the generator set speed; The second speed range includes: greater than or equal to the lower limit of the generator set's speed and less than the generator's rated speed; The third speed range includes: greater than or equal to the generator's rated speed; The step of correcting the initial speed-torque curve based on the corrected torque of the generator set to obtain the corrected speed-torque curve includes: The torque value corresponding to the required output speed of the generator set in the initial speed-torque curve is modified to the corrected torque value of the generator set, and then the lines are connected to obtain the corrected speed-torque curve. The method of controlling the wind turbine to reduce its power generation capacity based on the modified speed-torque curve includes: The required reduction in power generation capacity reference value is determined based on the revised speed-torque curve. Based on the power generation capacity reference value, the power generation capacity of the wind turbine is controlled to decrease to the power generation capacity reference value.

2. A derating control system for wind turbine generators, characterized in that, The system includes: The acquisition module is used to acquire the required output speed of the generator set and the initial speed-torque curve when the wind turbine is cooling down; The determination module is used to determine the corrected torque of the generator set based on the required output speed of the generator set; The correction module is used to correct the initial speed-torque curve according to the correction torque of the generator set, so as to obtain the corrected speed-torque curve. The control module is used to control the wind turbine to reduce its power generation capacity based on the corrected speed-torque curve; The determining module includes: The first determining unit is used to determine the speed range to which the required output speed of the generator set belongs; The second determining unit is used to determine the corrected torque of the generator set according to the speed range to which the speed belongs; The second determining unit is further configured to: When the speed range to which the specified speed belongs is the first speed range, the corrected torque of the generator set is determined to be... ,in, This represents the gain for the optimal tip speed ratio segment of a wind turbine. This refers to the required output speed of the generator set; When the speed range to which the specified speed belongs is the second speed range, the corrected torque of the generator set is determined to be... ,in, This is the lower limit of the generator set's speed. This is the generator's rated speed. This is the generator's rated torque. This is the lower limit of the generator set's torque. When the speed range to which the specified speed belongs is the third speed range, the corrected torque of the generator set is determined to be... ; The first speed range includes: greater than or equal to zero and less than the lower limit of the generator set speed; The second speed range includes: greater than or equal to the lower limit of the generator set's speed and less than the generator's rated speed; The third speed range includes: greater than or equal to the generator's rated speed; The correction module is also used for: The torque value corresponding to the required output speed of the generator set in the initial speed-torque curve is modified to the corrected torque value of the generator set, and then the lines are connected to obtain the corrected speed-torque curve. The control module is also used for: The required reduction in power generation capacity reference value is determined based on the revised speed-torque curve. Based on the power generation capacity reference value, the power generation capacity of the wind turbine is controlled to decrease to the power generation capacity reference value.

3. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the method as claimed in claim 1.

4. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method as described in claim 1.

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