Wind turbine generator capacity reduction control method and system, electronic equipment and storage medium

Abstract

The invention provides a wind turbine generator capacity reduction control method and system, electronic equipment and a storage medium. The method comprises the steps that the rotating speed needing to be output by a generator set and an initial rotating speed-torque curve when the wind turbine generator is cooled are obtained; according to the rotating speed needing to be output by the generator set, the correction torque of the generator set is determined; the initial rotating speed-torque curve is corrected according to the correction torque of the generator set, and a corrected rotating speed-torque curve is obtained; and controlling the wind turbine generator to reduce the power generation capacity based on the corrected rotating speed-torque curve. According to the technical scheme provided by the invention, for the situation that the cooling requirement needs to be met by reducing the rotating speed in the wind turbine generator, the corrected rotating speed-torque curve is used, compared with an original rotating speed-torque curve, the generating capacity of the generator set is obviously improved, and the generating capacity loss under the cooling requirement can be effectively reduced.

Description

Technical Field

[0001] The present application relates to the field of wind turbine control, and in particular to a method, system, electronic device and storage medium for controlling wind turbine capacity reduction. Background Art

[0002] The heat generated by components like wind turbine gearbox oil and bearings is positively correlated with generator speed. When component temperatures are excessively high, the cooling system's heat dissipation capacity has reached its maximum, requiring the generator speed to be reduced to effectively lower component temperatures. To reduce generator speed, the unit must be driven down to the optimal tip speed ratio according to the generator speed-torque curve. At this optimal tip speed ratio, the unit's generating capacity is typically below 50% of rated capacity. Therefore, using conventional derating methods to reduce the temperature of components like gearbox oil and bearings can result in significant power generation losses. Summary of the Invention

[0003] The present application provides a wind turbine capacity reduction control method, system, electronic device and storage medium to at least solve the technical problem that conventional capacity reduction methods result in large power generation losses.

[0004] The first embodiment of the present application provides a method for controlling capacity reduction of a wind turbine generator system, the method comprising:

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

[0006] determining a correction torque of the generator set according to the speed required to be output by the generator set;

[0007] Correcting the initial speed-torque curve according to the corrected torque of the generator set to obtain a corrected speed-torque curve;

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

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

[0010] Determining the speed range to which the speed required to be output by the generator set belongs;

[0011] The correction torque of the generator set is determined according to the speed range to which the speed belongs.

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

[0013] When the speed range to which the speed belongs is the first speed range, the correction torque of the generator set is determined to be Kopt W 2 , where K opt is the optimal tip speed ratio gain of the wind turbine, and W is the required output speed of the generator set;

[0014] When the speed range to which the speed belongs is the second speed range, the correction torque of the generator set is determined to be Among them, W L1 is the lower limit of the generator speed, W r is the rated speed of the generator, T r is the rated torque of the generator, T L1 is the lower limit of the speed of the generator set;

[0015] When the speed range to which the speed belongs is the third speed range, the correction torque of the generator set is determined to be T r ;

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

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

[0018] The third speed range includes: greater than or equal to the rated speed of the generator.

[0019] Furthermore, the initial speed-torque curve is corrected according to the corrected torque of the generator set to obtain a corrected speed-torque curve, including:

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

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

[0022] determining a reference value of the power generation capacity to be reduced according to the corrected 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] The second embodiment of the present application provides a wind turbine derating control system, including:

[0025] An acquisition module is used to obtain the speed required to be output by the wind turbine generator set and an initial speed-torque curve when the wind turbine generator set is cooled;

[0026] a determination module, configured to determine a correction torque of the generator set according to a speed required to be output by the generator set;

[0027] a correction module, configured to correct the initial speed-torque curve according to the corrected torque of the generator set to obtain a corrected speed-torque curve;

[0028] The control module is configured to control the wind turbine generator set to reduce power generation capacity based on the corrected speed-torque curve.

[0029] Preferably, the determining module includes:

[0030] A first determining unit, configured to determine a speed range to which the speed required to be output by the generator set belongs;

[0031] The second determining unit is configured to determine a correction torque of the generator set according to a speed range to which the speed belongs.

[0032] Furthermore, the second determining unit is further configured to:

[0033] When the speed range to which the speed belongs is the first speed range, the correction torque of the generator set is determined to be K opt W 2 , where K opt is the optimal tip speed ratio gain of the wind turbine, and W is the required output speed of the generator set;

[0034] When the speed range to which the speed belongs is the second speed range, the correction torque of the generator set is determined to be Among them, W L1 is the lower limit of the generator speed, W r is the rated speed of the generator, T r is the rated torque of the generator, T L1 is the lower limit of the speed of the generator set;

[0035] When the speed range to which the speed belongs is the third speed range, the correction torque of the generator set is determined to be T r ;

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

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

[0038] The third speed range includes: greater than or equal to the rated speed of the generator.

[0039] The third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method described in the first aspect is implemented.

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

[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 controlling wind turbine capacity reduction. The method includes: obtaining the speed required to be output by the generator set and the initial speed-torque curve when the wind turbine is cooling down; determining the corrected torque of the generator set based on the speed required to be output by the generator set; correcting the initial speed-torque curve based on the corrected torque of the generator set to obtain a corrected speed-torque curve; and controlling the wind turbine to reduce its power generation capacity based on the corrected speed-torque curve. The technical solution proposed in this application uses a corrected speed-torque curve for wind turbines that need to reduce their speed to meet cooling requirements. Compared with using the original speed-torque curve, the power generation capacity of the unit is significantly improved, and the power generation loss under such cooling requirements can be effectively reduced.

[0043] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0045] Figure 1 This is a flow chart of a wind turbine generator set capacity reduction control method provided according to one embodiment of the present application;

[0046] Figure 2 A schematic diagram of a speed-torque curve provided according to one embodiment of the present application;

[0047] Figure 3 This is a structural diagram of a wind turbine derating control system provided according to one embodiment of the present application;

[0048] Figure 4 This is a structural diagram of a determination module provided according to one embodiment of the present application;

[0049] Figure 5The figure is a structural diagram of a control module provided according to one embodiment of the present application. DETAILED DESCRIPTION

[0050] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0051] The present application proposes a method, system, electronic device, and storage medium for controlling wind turbine capacity reduction. The method includes: obtaining the speed required to be output by the generator set and the initial speed-torque curve when the wind turbine is cooling down; determining the corrected torque of the generator set based on the speed required to be output by the generator set; correcting the initial speed-torque curve based on the corrected torque of the generator set to obtain a corrected speed-torque curve; and controlling the wind turbine to reduce its power generation capacity based on the corrected speed-torque curve. The technical solution proposed in the present application uses a corrected speed-torque curve for wind turbines that need to reduce their speed to meet cooling requirements. Compared with using the original speed-torque curve, the power generation capacity of the unit is significantly improved, and the power generation loss under such cooling requirements can be effectively reduced.

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

[0053] Example 1

[0054] Figure 1 This is a flow chart of a wind turbine capacity reduction control method provided according to one embodiment of the present application, such as Figure 1 As shown, the method includes:

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

[0056] It should be noted that the heat generated by wind turbine gearbox oil, bearings and other components 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 according to the required output speed of the generator set.

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

[0059] Step 2-1: Determine the speed range to which the speed required to be output by 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, the step 2-2 includes:

[0062] When the speed range to which the speed belongs is the first speed range, the correction torque of the generator set is determined to be K opt W 2 , where K opt is the optimal tip speed ratio gain of the wind turbine, and W is the required output speed of the generator set;

[0063] When the speed range to which the speed belongs is the second speed range, the correction torque of the generator set is determined to be Among them, W L1 is the lower limit of the generator speed, W r is the rated speed of the generator, T r is the rated torque of the generator, T L1 is the lower limit of the speed of the generator set;

[0064] When the speed range to which the speed belongs is the third speed range, the correction torque of the generator set is determined to be T r ;

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

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

[0067] The third speed range includes: greater than or equal to the rated speed of the generator.

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

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

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

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

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

[0073] Step 4-1: determining a reference value of the power generation capacity to be reduced according to 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, according to the design parameters of the wind turbine, the minimum generator speed W1, the rated generator speed W r , generator rated torque T r , optimal tip speed ratio gain K opt Follow the steps below to get the corrected generator speed-torque curve:

[0076] 1. Due to factors such as the converter's allowable operating range and the stall of the rotor blades, the wind turbine generator torque at each speed is limited. The lower speed limit W when the generator torque and speed are adjusted synchronously can be obtained. L1 , so the maximum torque of the generator at each speed satisfies the following conditions

[0077]

[0078] 2. Adjust the output generator speed setting value W according to the component temperature rt , use the formula in 1 to calculate the generator torque setting value T rt , then the generating capacity after the unit is reduced is P rt =W rt ×T rt ;

[0079] 3. The speed-torque curve of the unit changes from the original ABCD to ABC after adjustment and correction based on component temperature. rt -D rt ,like Figure 2 As shown;

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

[0081]

[0082] 5. When using the modified speed-torque curve derating method, the unit's capacity increase P compared to the initial curve d As follows, Figure 2 Middle curve C rt -D rt part

[0083]

[0084] From the above, it can be seen that the power generation capacity of the unit is significantly improved when using the corrected speed-torque curve compared to using the original speed-torque curve.

[0085] In summary, the wind turbine capacity reduction control method proposed in this embodiment uses a modified speed-torque curve for wind turbines that need to meet the cooling requirement by reducing the speed. Compared with using the original speed-torque curve, the power generation capacity of the unit is significantly improved, and the power generation loss under such cooling requirement can be effectively reduced.

[0086] Example 2

[0087] Figure 3 This is a structural diagram of a wind turbine derating control system provided according to one embodiment of the present application, such as Figure 3 As shown, the system includes:

[0088] An acquisition module 100 is used to acquire the speed required to be output by the wind turbine generator set and an initial speed-torque curve when the wind turbine generator set is cooled;

[0089] A determination module 200 is configured to determine a correction torque of the generator set according to a required output speed of the generator set;

[0090] a correction module 300 for correcting the initial speed-torque curve according to the corrected torque of the generator set to obtain a corrected speed-torque curve;

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

[0092] In the embodiment of the present disclosure, Figure 4 As shown, the determination module 200 includes:

[0093] The first determining unit 201 is configured to determine a speed range to which the speed required to be output by the generator set belongs;

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

[0095] Furthermore, the second determining unit 202 is further configured to:

[0096] When the speed range to which the speed belongs is the first speed range, the correction torque of the generator set is determined to be K opt W 2 , where K opt is the optimal tip speed ratio gain of the wind turbine, and W is the required output speed of the generator set;

[0097] When the speed range to which the speed belongs is the second speed range, the correction torque of the generator set is determined to be Among them, W L1 is the lower limit of the generator speed, W r is the rated speed of the generator, T r is the rated torque of the generator, T L1 is the lower limit of the speed of the generator set;

[0098] When the speed range to which the speed belongs is the third speed range, the correction torque of the generator set is determined to be T r ;

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

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

[0101] The third speed range includes: greater than or equal to the rated speed of the generator.

[0102] In the embodiment of the present disclosure, the correction module 300 is specifically configured to:

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

[0104] In the embodiment of the present disclosure, Figure 5 As shown, the control module 400 includes:

[0105] A third determining unit 401 is configured to determine a reference value of the power generation capacity to be reduced to according to the modified speed-torque curve;

[0106] The control unit 402 is configured to control the power generation capacity of the wind turbine generator set 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 uses a modified speed-torque curve for the wind turbine that needs to meet the cooling requirement by reducing the speed. Compared with using the original speed-torque curve, the power generation capacity of the unit is significantly improved, and the power generation loss under such cooling requirement can be effectively reduced.

[0108] Example 3

[0109] To implement the above embodiments, the present disclosure further proposes an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method described in the first embodiment is implemented.

[0110] Example 4

[0111] In order to implement the above embodiments, the present disclosure further proposes a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the method described in the first embodiment is implemented.

[0112] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0113] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0114] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A wind turbine capacity reduction control method, characterized in that: The method comprises: Obtain the required output speed and initial speed-torque curve of the wind turbine generator set when the wind turbine generator set is cooled; determining a correction torque of the generator set according to the speed required to be output by the generator set; Correcting the initial speed-torque curve according to the corrected torque of the generator set to obtain a corrected speed-torque curve; The wind turbine generator set is controlled to reduce power generation capacity based on the corrected speed-torque curve.

2. The method according to claim 1, wherein The step of determining the corrected torque of the generator set according to the required output speed of the generator set includes: Determining the speed range to which the speed required to be output by the generator set belongs; The correction torque of the generator set is determined according to the speed range to which the speed belongs.

3. The method according to claim 2, wherein The determining the corrected torque of the generator set according to the speed range to which the speed belongs includes: When the speed range to which the speed belongs is the first speed range, the correction torque of the generator set is determined to be K opt W 2 , where K opt is the optimal tip speed ratio gain of the wind turbine, and W is the required output speed of the generator set; When the speed range to which the speed belongs is the second speed range, the correction torque of the generator set is determined to be Among them, W L1 is the lower limit of the generator speed, W r is the rated speed of the generator, T r is the rated torque of the generator, T L1 is the lower limit of the speed of the generator set; When the speed range to which the speed belongs is the third speed range, the correction torque of the generator set is determined to be T r ; The first speed range includes: a speed greater than or equal to zero and less than the lower limit of the speed of the generator set; The second speed range includes: greater than or equal to the lower speed limit of the generator set and less than the rated speed of the generator; The third speed range includes: greater than or equal to the rated speed of the generator.

4. The method according to claim 3, wherein The step of correcting the initial speed-torque curve according to the corrected torque of the generator set to obtain a corrected speed-torque curve includes: The torque value corresponding to the speed required to be output by the generator set in the initial speed-torque curve is modified to the corrected torque value of the generator set, and then connected to obtain a corrected speed-torque curve.

5. The method according to claim 1, wherein The controlling the wind turbine to reduce power generation capacity based on the modified speed-torque curve includes: determining a reference value of the power generation capacity to be reduced according to the corrected 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.

6. A wind turbine derating control system, characterized in that: The system comprises: An acquisition module is used to obtain the speed required to be output by the wind turbine generator set and an initial speed-torque curve when the wind turbine generator set is cooled; a determination module, configured to determine a correction torque of the generator set according to a speed required to be output by the generator set; a correction module, configured to correct the initial speed-torque curve according to the corrected torque of the generator set to obtain a corrected speed-torque curve; The control module is configured to control the wind turbine generator set to reduce power generation capacity based on the corrected speed-torque curve.

7. The system according to claim 6, wherein: The determining module includes: A first determining unit, configured to determine a speed range to which the speed required to be output by the generator set belongs; The second determining unit is configured to determine a correction torque of the generator set according to a speed range to which the speed belongs.

8. The system according to claim 7, wherein: The second determining unit is further configured to: When the speed range to which the speed belongs is the first speed range, the correction torque of the generator set is determined to be K opt W 2 , where K opt is the optimal tip speed ratio gain of the wind turbine, and W is the required output speed of the generator set; When the speed range to which the speed belongs is the second speed range, the correction torque of the generator set is determined to be Among them, W L1 is the lower limit of the generator speed, W r is the rated speed of the generator, T r is the rated torque of the generator, T L1 is the lower limit of the speed of the generator set; When the speed range to which the speed belongs is the third speed range, the correction torque of the generator set is determined to be T r ; The first speed range includes: a speed greater than or equal to zero and less than the lower limit of the speed of the generator set; The second speed range includes: greater than or equal to the lower speed limit of the generator set and less than the rated speed of the generator; The third speed range includes: greater than or equal to the rated speed of the generator.

9. 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 when the processor executes the program, the method according to any one of claims 1 to 5 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

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