A wind turbine control method and apparatus

Abstract

The application provides a wind turbine control method and device. In the application, the actual air density of the area where the wind turbine is located is obtained. The target pitch angle corresponding to the maximum power generation of the wind turbine under the actual air density is obtained. The pitch angle of the blade in the wind turbine is adjusted from the current pitch angle to the target pitch angle based on the pitch drive. The target torque corresponding to the maximum power generation of the wind turbine under the actual air density is obtained. The torque of the generator in the wind turbine is adjusted from the current torque to the target torque based on the torque controller. The scheme of the application controls the pitch angle of the blade in the wind turbine and the torque of the generator in the wind turbine based on the actual air density of the area where the wind turbine is located, which can effectively consider the influence of the air density on the power generation of the wind turbine, improve the power generation of the wind turbine, and improve the power generation efficiency of the wind turbine.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power generation, and particularly relates to a wind turbine control method and device. BACKGROUND

[0002] Wind energy is a clean and renewable energy. In recent years, with the rapid development of the wind power industry, the control requirements for the operation of wind turbines are also increasingly high. Below the rated wind speed, the wind turbine usually takes maximum power tracking as the control target, that is, the pitch angle of the blades of the wind turbine is kept unchanged, and the generator torque is controlled to ensure that the wind turbine operates at the optimal power coefficient, so as to realize the maximum power generation at the specified incoming wind speed. SUMMARY

[0003] The present application shows a wind turbine control method and device.

[0004] In a first aspect, the present application shows a wind turbine control method, the method comprising:

[0005] obtaining an actual air density of a region where the wind turbine is located;

[0006] obtaining a target pitch angle corresponding to the maximum power generation of the wind turbine under the actual air density; adjusting the pitch angle of the blades in the wind turbine from a current pitch angle to the target pitch angle based on a pitch drive; obtaining a target torque corresponding to the maximum power generation of the wind turbine under the actual air density; adjusting the torque of the generator in the wind turbine from a current torque to the target torque based on a torque controller.

[0007] In a second aspect, the present application shows a wind turbine control device, the device comprising:

[0008] a first obtaining module configured to obtain an actual air density of a region where the wind turbine is located;

[0009] a second obtaining module configured to obtain a target pitch angle corresponding to the maximum power generation of the wind turbine under the actual air density; a first adjusting module configured to adjust the pitch angle of the blades in the wind turbine from a current pitch angle to the target pitch angle based on a pitch drive; a third obtaining module configured to obtain a target torque corresponding to the maximum power generation of the wind turbine under the actual air density; and a second adjusting module configured to adjust the torque of the generator in the wind turbine from a current torque to the target torque based on a torque controller.

[0010] In a third aspect, the present application shows an electronic device, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute the method of any of the above aspects.

[0011] In a fourth aspect, the present application shows a non-transitory computer-readable storage medium, when instructions in the storage medium are executed by a processor of an electronic device, the electronic device is enabled to perform the method according to any one of the preceding aspects.

[0012] In a fifth aspect, the present application shows a computer program product, when instructions in the computer program product are executed by a processor of an electronic device, the electronic device is enabled to perform the method according to any one of the preceding aspects.

[0013] The technical scheme provided by the present application can include the following beneficial effects:

[0014] In the present application, the actual air density of the area where the wind turbine generator is located is obtained. The target pitch angle corresponding to the maximum power generation of the wind turbine generator under the actual air density is obtained. The pitch angle of the blade in the wind turbine generator is adjusted from the current pitch angle to the target pitch angle based on the pitch drive. The target torque corresponding to the maximum power generation of the wind turbine generator under the actual air density is obtained. The torque of the generator in the wind turbine generator is adjusted from the current torque to the target torque based on the torque controller.

[0015] The scheme of the present application is based on the actual air density of the area where the wind turbine generator is located to control the pitch angle of the blade in the wind turbine generator and control the torque of the generator in the wind turbine generator, which can effectively consider the influence of air density on the power generation of the wind turbine generator, and can improve the power generation of the wind turbine generator and improve the power generation efficiency of the wind turbine generator. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a step flow chart of a wind turbine generator control method according to the present application.

[0017] Figure 2 is a step flow chart of a method for obtaining a target torque according to the present application.

[0018] Figure 3 is a schematic diagram of a wind turbine generator control system according to the present application.

[0019] Figure 4 is a schematic diagram of the power generation of a wind turbine generator according to the present application.

[0020] Figure 5 is a structural block diagram of a wind turbine generator control device according to the present application.

[0021] Figure 6 is a block diagram of an electronic device according to the present application.

[0022] Figure 7 is a block diagram of an electronic device according to the present application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0024] The inventor has found that, in addition to the incoming flow wind speed, the power generation of a wind turbine (a wind power generator set) is also affected by environmental parameters such as air density, that is, both the wind speed and the air density determine the size of wind energy, but currently, the optimal control curve is calculated according to the standard air density in the design stage of the wind turbine, so the control mainly targets the change of the wind speed, and the change of the air density is not considered.

[0025] The inventor has also found that, once the designed model is applied under a non-standard air density, the actual operation of the unit will deviate from the optimal power generation curve, and the best power generation efficiency cannot be obtained.

[0026] Due to the influence of geographical conditions and the environment, the air densities of different wind farms are different. Although some wind farms will make slight adjustments to the optimal power generation curve according to the actual operation of the wind turbine and the measured environmental data during grid connection debugging, even in the same wind farm, the air density will change greatly due to the temperature changes caused by factors such as day and night and seasons, thereby affecting the power control and power output of the wind turbine, and the best power generation efficiency cannot be obtained.

[0027] Therefore, if the influence of the change of the air density on the operation of the wind turbine is not considered, the unit will not operate in the best working condition in the maximum power tracking area, causing power generation loss.

[0028] In view of this, the present application proposes a wind turbine control method capable of considering the change of the air density, thereby reducing the power generation loss of the wind turbine caused by the change of the air density.

[0029] Referring to Figure 1 , a step flowchart of a wind turbine control method of the present application is shown, which can be applied to an electronic device, which can be a computing terminal in a wind turbine and the like, and has computing capability, wherein the method can specifically include the following steps:

[0030] In step S101, the actual air density of the area where the wind turbine is located is obtained.

[0031] In an embodiment of the present application, the actual temperature of the area where the wind turbine is located, the actual air pressure of the area where the wind turbine is located, and the actual humidity of the area where the wind turbine is located can be acquired.

[0032] The actual temperature of the area where the wind turbine is located can be acquired by a thermometer arranged on the wind turbine, for example, the thermometer arranged on the wind turbine detects the actual temperature of the area where the wind turbine is located, and transmits the detected actual temperature of the area where the wind turbine is located to the electronic device, and the electronic device can receive the actual temperature of the area where the wind turbine is located transmitted by the thermometer arranged on the wind turbine.

[0033] The actual air pressure of the area where the wind turbine is located can be acquired by an air pressure gauge arranged on the wind turbine, for example, the air pressure gauge arranged on the wind turbine detects the actual air pressure of the area where the wind turbine is located, and transmits the detected actual air pressure of the area where the wind turbine is located to the electronic device, and the electronic device can receive the actual air pressure of the area where the wind turbine is located transmitted by the air pressure gauge arranged on the wind turbine.

[0034] The actual humidity of the area where the wind turbine is located can be acquired by a humidity gauge arranged on the wind turbine, for example, the humidity gauge arranged on the wind turbine detects the actual humidity of the area where the wind turbine is located, and transmits the detected actual humidity of the area where the wind turbine is located to the electronic device, and the electronic device can receive the actual humidity of the area where the wind turbine is located transmitted by the humidity gauge arranged on the wind turbine.

[0035] Then, the actual air density can be calculated according to the actual temperature, the actual air pressure, and the actual humidity.

[0036] For example, the actual air density can be calculated according to the actual temperature, the actual air pressure, and the actual humidity, according to the following formula:

[0037]

[0038] e = E * f

[0039]

[0040] In the above formula, ρ real is the actual air density, the unit is kg / m 3 , t is the actual temperature, the unit is ℃, p is the actual air pressure, the unit is hPa, f is the actual humidity, which can be represented by “%”. “*” is the multiplication symbol.

[0041] It should be noted that, after the actual air density of the area where the wind turbine generator is located is obtained in step S101, and before steps S102 and S103 are performed, the pitch angle of the blade in the wind turbine generator at this time is the current pitch angle, and the torque of the generator in the wind turbine generator is the current torque.

[0042] Further, after the actual air density of the area where the wind turbine generator is located is obtained in step S101, and before steps S102 and S103 are performed, it can be determined whether the difference between the actual air density and the reference air density is greater than the preset difference. For example, the absolute value of the difference between the actual air density and the reference air density can be calculated and used as the difference between the actual air density and the reference air density.

[0043] The preset difference can include 0.09, 0.1 or 0.11, etc., and can be determined according to actual conditions, which is not limited in the present application.

[0044] It should be noted that the pitch angle corresponding to the maximum power generation of the wind turbine generator under the reference air density is the current pitch angle, and the torque corresponding to the maximum power generation of the wind turbine generator under the reference air density is the current torque.

[0045] In the case where the difference between the actual air density and the reference air density is greater than the preset difference, it indicates that the air density changes greatly, and the great change of the air density has a certain influence on the power generation of the wind turbine generator. Therefore, step S102 can be performed, and step S103 can be performed to improve the power generation of the wind turbine generator.

[0046] Alternatively, in the case where the difference between the actual air density and the reference air density is less than or equal to the preset difference, it indicates that the air density has not changed or has changed little, and the change of the air density has little influence on the power generation of the wind turbine generator. Therefore, step S102 can not be performed, step S103 can not be performed, the process can be ended, or a certain period of time can be returned to perform step S101.

[0047] In step S102, the target pitch angle corresponding to the maximum power generation of the wind turbine generator under the actual air density is obtained. The pitch angle of the blade in the wind turbine generator is adjusted from the current pitch angle to the target pitch angle based on the pitch drive.

[0048] After the electronic device obtains the target pitch angle, the electronic device can transmit the target pitch angle to the pitch drive in the wind turbine generator, so that the pitch drive adjusts the pitch angle of the blade in the wind turbine generator from the current pitch angle to the target pitch angle, to improve the power generation of the wind turbine generator under the actual air density, and reduce the loss of the power generation of the wind turbine generator caused by the change of the air density.

[0049] In the present application, the actual air density ρ (kg / m3) can be divided into multiple air density intervals in advance, for example, [0.8-0.9), [0.9-1.0), [1.0-1.1), [1.1-1.2), and [1.2-1.3), and so on. The above intervals are only suitable examples, and the length of the interval can be determined according to the actual situation, which can be larger or smaller, and there can be more air density intervals, which are not limited in the present application.

[0050] For the wind turbine, for any air density interval, the power generation of the wind turbine can be tested under the condition that the air density of the region where the wind turbine is located is in the air density interval and the pitch angle of the blade in the wind turbine is each pitch angle. The pitch angle of the blade at the maximum power generation of the wind turbine is taken as the pitch angle corresponding to the maximum power generation of the wind turbine under the air density interval, and then the air density interval and the pitch angle corresponding to the maximum power generation of the wind turbine under the air density interval form a corresponding table item and are stored in the corresponding relationship between the air density interval and the pitch angle corresponding to the maximum power generation of the wind turbine. For each other air density interval, the above operation is also performed.

[0051] In this way, when obtaining the target pitch angle corresponding to the maximum power generation of the wind turbine under the actual air density, the pitch angle corresponding to the air density interval where the actual air density is located can be found in the corresponding relationship between the air density interval and the pitch angle corresponding to the maximum power generation of the wind turbine, and taken as the target pitch angle, so as to improve the efficiency of obtaining the target pitch angle.

[0052] In addition, the power generation of the wind turbine can be tested under the condition that the air density of the region where the wind turbine is located is the standard air density (1.225 kg / m3) and the pitch angle of the blade in the wind turbine is each pitch angle. The pitch angle of the blade at the maximum power generation of the wind turbine (for example, 2°-5°) is taken as the pitch angle corresponding to the maximum power generation of the wind turbine under the standard air density and is stored for subsequent possible use.

[0053] Under the standard air density, the pitch angle of the wind turbine is a constant value (usually 2°-5°), and the power generation of the wind turbine is the maximum. However, when the air density decreases, the power generation of the wind turbine will also decrease, at this time, the wind turbine is not running at the maximum power generation state, so the size of the pitch angle of the blade in the wind turbine can be adjusted to improve the power generation of the wind turbine, to compensate for the impact of the decrease of the air density on the power generation of the wind turbine.

[0054] In step S103, a target torque corresponding to the maximum power generation of the wind turbine under the actual air density is obtained. The torque of the generator in the wind turbine is adjusted from the current torque to the target torque based on the torque controller.

[0055] In the present application, step S102 and step S103 can be executed in parallel after step S101 is executed, or step S102 and step S103 can be executed in sequence.

[0056] The process of obtaining the target torque corresponding to the maximum power generation of the wind turbine under the actual air density can be seen in the embodiment shown in the following Figure 2 , which will not be described in detail here.

[0057] After the electronic device obtains the target torque, the electronic device can transmit the target torque to the torque controller in the wind turbine, so that the torque controller adjusts the torque of the generator in the wind turbine from the current torque to the target torque, so as to improve the power generation of the wind turbine under the actual air density and reduce the loss of power generation of the wind turbine caused by the change of air density.

[0058] In the present application, the actual air density of the area where the wind turbine is located is obtained. A target pitch angle corresponding to the maximum power generation of the wind turbine under the actual air density is obtained. The pitch angle of the blade in the wind turbine is adjusted from the current pitch angle to the target pitch angle based on the pitch drive. A target torque corresponding to the maximum power generation of the wind turbine under the actual air density is obtained. The torque of the generator in the wind turbine is adjusted from the current torque to the target torque based on the torque controller.

[0059] The scheme of the present application is based on the actual air density of the area where the wind turbine is located to control the pitch angle of the blade in the wind turbine and control the torque of the generator in the wind turbine, which can effectively consider the influence of air density on the power generation of the wind turbine, can improve the power generation of the wind turbine and improve the power generation efficiency of the wind turbine.

[0060] In an embodiment of the present application, referring to Figure 2 , the process of obtaining the target torque corresponding to the maximum power generation of the wind turbine under the actual air density in step S103 includes:

[0061] In step S201, a target torque gain parameter corresponding to the maximum power generation of the wind turbine under the actual air density is obtained, and the actual speed of the generator in the wind turbine is obtained.

[0062] In an embodiment of the present application, this step can be realized by the following process, including:

[0063] 2011, obtaining a standard torque gain parameter corresponding to the maximum power generation of the wind turbine under the standard air density.

[0064] In an embodiment of the present application, the standard air density, the optimal power coefficient of the wind turbine, the rotor radius of the wind turbine, the gearbox ratio of the wind turbine and the optimal tip speed ratio of the wind turbine can be obtained.

[0065] The standard air density can be 1.225 kg / m 3 .

[0066] The optimal power coefficient of the wind turbine is a constant value for the wind turbine, and the optimal power coefficients of different types of wind turbines are not all the same or all different.

[0067] The rotor radius of the wind turbine is a constant value for the wind turbine, and the rotor radii of different types of wind turbines are not all the same or all different.

[0068] The gearbox ratio of the wind turbine is a constant value for the wind turbine, and the gearbox ratios of different types of wind turbines are not all the same or all different.

[0069] The optimal tip speed ratio of the wind turbine is a constant value for the wind turbine, and the optimal tip speed ratios of different types of wind turbines are not all the same or all different.

[0070] The standard air density, the optimal power coefficient of the wind turbine, the rotor radius of the wind turbine, the gearbox ratio of the wind turbine and the optimal tip speed ratio of the wind turbine can all be stored in an electronic device, so that the electronic device can directly read the stored standard air density, the optimal power coefficient of the wind turbine, the rotor radius of the wind turbine, the gearbox ratio of the wind turbine and the optimal tip speed ratio of the wind turbine.

[0071] Then, the standard torque gain parameter can be calculated according to the standard air density, the optimal power coefficient of the wind turbine, the rotor radius of the wind turbine, the gearbox ratio of the wind turbine and the optimal tip speed ratio of the wind turbine.

[0072] For example, the standard torque gain parameter can be calculated according to the standard air density, the optimal power coefficient of the wind turbine, the rotor radius of the wind turbine, the gearbox ratio of the wind turbine and the optimal tip speed ratio of the wind turbine according to the following formula:

[0073]

[0074] In the above formula, K opt_std is the standard torque gain parameter. C pis an optimal power coefficient of the wind turbine. R is a rotor radius of the wind turbine. G is a gearbox ratio of the wind turbine. λ opt is an optimal tip speed ratio of the wind turbine. p std is a standard air density.

[0075] The above formula is: calculating a first product between π and C p , calculating a second product between the first product and R 5 , calculating a third product between the second product and p std . Calculating a fourth product between the value 2 and G, calculating a fifth product between the fourth product and λ opt 3 . Calculating a ratio between the third product and the fifth product.

[0076] 2012, in the case that the actual air density is the same as the standard air density, obtaining the target torque gain parameter according to the standard torque gain parameter.

[0077] In the present application, in the case that the actual air density is the same as the standard air density, it is explained that the air density has not changed, so the torque gain parameter corresponding to the maximum power generation of the wind turbine has not changed, so the target torque gain parameter corresponding to the maximum power generation of the wind turbine under the actual air density is the same as the standard torque gain parameter corresponding to the maximum power generation of the wind turbine under the standard air density, so the standard torque gain parameter corresponding to the maximum power generation of the wind turbine under the standard air density can be determined as the target torque gain parameter corresponding to the maximum power generation of the wind turbine under the actual air density.

[0078] 2013, in the case that the actual air density is different from the standard air density, obtaining the standard air density, calculating the target torque gain parameter according to the standard air density, the actual air density and the standard torque gain parameter.

[0079] In the present application, in the case that the actual air density is different from the standard air density, it is explained that the air density has changed, so the torque gain parameter corresponding to the maximum power generation of the wind turbine will change, so the target torque gain parameter corresponding to the maximum power generation of the wind turbine under the actual air density is different from the standard torque gain parameter corresponding to the maximum power generation of the wind turbine under the standard air density, it is necessary to calculate the target torque gain parameter according to the actual air density, for example, obtaining the standard air density, calculating the target torque gain parameter according to the standard air density, the actual air density and the standard torque gain parameter.

[0080] In one embodiment of the present application, the target torque gain parameter can be calculated according to the standard air density, the actual air density and the standard torque gain parameter according to the following formula:

[0081]

[0082] In the above formula, K opt_real is the target torque gain parameter, K opt_std is the standard torque gain parameter, p real is the actual air density, p std is the standard air density.

[0083] The above formula is to calculate the ratio between K opt_std and p std , and then calculate the product between the ratio and p real .

[0084] Step 2012 and step 2013 are two different branches, and the two branches are the logical relationship of "or".

[0085] In step S202, the target torque is calculated according to the target torque gain parameter and the actual speed.

[0086] In one embodiment of the present application, the target torque can be calculated according to the target torque gain parameter and the actual speed according to the following formula:

[0087] T g = K opt_real ω g 2

[0088] In the above formula, T g is the target torque, ω g is the actual speed, K opt_real is the target torque gain parameter. The above formula is to calculate the product between the two.

[0089] Figure 3 A schematic diagram of a wind turbine control system of the present application is shown.

[0090] The control system includes: 1 - low speed rotating shaft, 2 - gearbox, 3 - high speed rotating shaft, 4 - generator, 5 - torque controller, 6 - torque gain adjustment center, 7 - air density calculation center, 8 - pitch angle adjustment center, 9 - wind turbine blade, 10 - variable pitch drive.

[0091] In the following, one embodiment of the present application is described in detail in combination with a wind turbine control system, and the flow includes:

[0092] 1. Within the tracking range of the maximum power generation of the wind turbine, simulate the wind turbine, establish a lookup table between the two parameters of air density range and pitch angle, and save the lookup table to the 8-pitch angle adjustment center.

[0093] 2. Input the three parameters of temperature (t), air pressure (p), and humidity (f) of the area where the wind turbine is located into the 7-Air Density Calculation Center to calculate the actual air density (ρ) of the area where the wind turbine is located. real .

[0094] 3. The actual air density ρ in the area where the wind turbine is located. real Compared with standard air density ρ std If the absolute value of the difference between the two is Δ≥θ, proceed to the next step; otherwise, ignore the impact of air density changes on the operation of the wind turbine and end the process.

[0095] 4. Calculate the actual air density ρ real Input 8-pitch angle adjustment center, and use the lookup table between air density and pitch angle to obtain ρ real Corresponding pitch angle β real , will β real The signal input 10-pitch driver realizes the adjustment of the pitch angle of the blades in the 9-wind turbine, thereby improving the power generation of the wind turbine.

[0096] 5. Calculate the actual air density ρ real Input 6 - Torque Gain Adjustment Center, calculate the wind turbine torque gain parameter K. opt_real Then K opt_real Input 5 - Torque controller to calculate the torque T of the wind turbine generator. g Finally, by adjusting the torque of the high-speed shaft of unit 3, the operation control of the wind turbine unit 4-generator is achieved, further increasing the power generation of the wind turbine unit.

[0097] 6. By adjusting the blade pitch angle and generator torque, wind turbine operation control that takes into account changes in air density can be achieved.

[0098] Furthermore, such as Figure 4 As shown, under standard air density, the wind turbine operates at its theoretical optimal operating point A. However, when air density changes, because the turbine control system does not consider the impact of air density changes, the turbine will actually operate at point B, resulting in a decrease in power generation. This application, by adjusting the blade pitch angle and generator torque, allows the wind turbine to operate at point C, increasing its power generation compared to point B and effectively reducing the impact of air density changes on its power generation.

[0099] It should be noted that, for the method embodiments, the sequences of the actions described for implementing the methods are merely illustrative, and do not limit the present application. In some embodiments, the sequences of the actions can be performed in other sequences or at the same time, or with additional actions, without departing from the scope of the present application. Additionally, those skilled in the art will appreciate that embodiments described in the detailed description can include other elements in addition to those necessary for an enabling disclosure of the present application.

[0100] With reference to Figure 5 , a structural block diagram of a wind turbine control device is shown, which comprises:

[0101] The first obtaining module 11 is configured to obtain an actual air density of a region where the wind turbine is located.

[0102] The second obtaining module 12 is configured to obtain a target pitch angle corresponding to the maximum power generation of the wind turbine under the actual air density; the first adjusting module 13 is configured to adjust the pitch angle of the blades in the wind turbine from a current pitch angle to the target pitch angle based on a pitch drive; the third obtaining module 14 is configured to obtain a target torque corresponding to the maximum power generation of the wind turbine under the actual air density; and the second adjusting module 15 is configured to adjust the torque of the generator in the wind turbine from a current torque to the target torque based on a torque controller.

[0103] In an optional implementation, the device further comprises:

[0104] The determining module is configured to determine whether a difference between the actual air density and a reference air density is greater than a preset difference after obtaining the actual air density of the region where the wind turbine is located.

[0105] Wherein, the pitch angle corresponding to the maximum power generation of the wind turbine under the reference air density is the current pitch angle, and the torque corresponding to the maximum power generation of the wind turbine under the reference air density is the current torque.

[0106] The second obtaining module is further configured to, in the case that the difference between the actual air density and the reference air density is greater than the preset difference, obtain again the target pitch angle corresponding to the maximum power generation of the wind turbine under the actual air density.

[0107] The third obtaining module is further configured to, in the case that the difference between the actual air density and the reference air density is greater than the preset difference, obtain again the target torque corresponding to the maximum power generation of the wind turbine under the actual air density.

[0108] In an optional implementation, the first obtaining module comprises:

[0109] The first obtaining unit is configured to obtain an actual temperature of an area where the wind turbine is located, an actual air pressure of the area where the wind turbine is located, and an actual humidity of the area where the wind turbine is located.

[0110] The first calculating unit is configured to calculate the actual air density according to the actual temperature, the actual air pressure, and the actual humidity.

[0111] In an optional implementation, the first calculating unit includes:

[0112] The first calculating sub-unit is configured to calculate the actual air density according to the actual temperature, the actual air pressure, and the actual humidity, according to the following formula:

[0113]

[0114] e = E * f

[0115]

[0116] In the above formula, ρ real is the actual air density, t is the actual temperature, p is the actual air pressure, and f is the actual humidity.

[0117] In an optional implementation, the second obtaining module includes:

[0118] The searching unit is configured to search, in a correspondence between air density intervals and pitch angles corresponding to maximum power generation of the wind turbine, a pitch angle corresponding to an air density interval in which the actual air density is located, and take the pitch angle as the target pitch angle.

[0119] In an optional implementation, the third obtaining module includes:

[0120] The second obtaining unit is configured to obtain a target torque gain parameter corresponding to the maximum power generation of the wind turbine at the actual air density, and obtain an actual rotating speed of a generator in the wind turbine.

[0121] The second calculating unit is configured to calculate the target torque according to the target torque gain parameter and the actual rotating speed.

[0122] In an optional implementation, the second obtaining unit includes:

[0123] The first obtaining sub-unit is configured to obtain a standard torque gain parameter corresponding to the maximum power generation of the wind turbine at a standard air density.

[0124] the standard air density is same as the actual air density, the target torque gain parameter is obtained according to the standard torque gain parameter;

[0125] or,

[0126] the third obtaining sub-unit is configured to, in a case where the actual air density is different from the standard air density, obtain a standard air density, and the second calculating sub-unit is configured to calculate the target torque gain parameter according to the standard air density, the actual air density and the standard torque gain parameter.

[0127] In an optional implementation, the first obtaining sub-unit is specifically configured to: obtain a standard air density, an optimal power coefficient of the wind turbine, a rotor radius of the wind turbine, a gearbox transmission ratio of the wind turbine and an optimal tip speed ratio of the wind turbine; and calculate the standard torque gain parameter according to the standard air density, the optimal power coefficient of the wind turbine, the rotor radius of the wind turbine, the gearbox transmission ratio of the wind turbine and the optimal tip speed ratio of the wind turbine.

[0128] In an optional implementation, the first obtaining sub-unit is specifically configured to: calculate the standard torque gain parameter according to the standard air density, the optimal power coefficient of the wind turbine, the rotor radius of the wind turbine, the gearbox transmission ratio of the wind turbine and the optimal tip speed ratio of the wind turbine according to the following formula:

[0129]

[0130] In the above formula, K opt_std is the standard torque gain parameter; C p is the optimal power coefficient; R is the rotor radius; G is the gearbox transmission ratio; λ opt is the optimal tip speed ratio, and ρ std is the standard air density.

[0131] In an optional implementation, the second calculating sub-unit is specifically configured to:

[0132] calculate the target torque gain parameter according to the standard air density, the actual air density and the standard torque gain parameter according to the following formula:

[0133]

[0134] In the above formula, K opt_real is the target torque gain parameter, K opt_std is the standard torque gain parameter, ρ realρ std is the standard air density.

[0135] In an alternative implementation, the second calculating unit comprises:

[0136] A third calculating sub-unit is configured to calculate the target torque according to the target torque gain parameter and the actual rotating speed according to the following formula:

[0137] T g = K opt_real ω g 2

[0138] In the above formula, T g is the target torque; ω g is the actual rotating speed, and K opt_real is the target torque gain parameter.

[0139] In the present application, the actual air density of the area where the wind turbine generator is located is obtained. The target pitch angle corresponding to the maximum power generation of the wind turbine generator under the actual air density is obtained. The pitch angle of the blades in the wind turbine generator is adjusted from the current pitch angle to the target pitch angle based on the pitch drive. The target torque corresponding to the maximum power generation of the wind turbine generator under the actual air density is obtained. The torque of the generator in the wind turbine generator is adjusted from the current torque to the target torque based on the torque controller.

[0140] The scheme of the present application is based on the actual air density of the area where the wind turbine generator is located to control the pitch angle of the blades in the wind turbine generator and control the torque of the generator in the wind turbine generator, which can effectively consider the influence of air density on the power generation of the wind turbine generator, can improve the power generation of the wind turbine generator, and improve the power generation efficiency of the wind turbine generator.

[0141] For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the related parts refer to the part of the method embodiment.

[0142] Optionally, the present application also provides an electronic device, comprising: a processor, a memory, a computer program stored in the memory and executable on the processor, which implements each process of the above-mentioned method embodiment when executed by the processor and achieves the same technical effect, and the same technical effect is not repeated here.

[0143] The embodiment of the present application further provides a computer readable storage medium, and the computer readable storage medium stores a computer program. The computer program is executed by a processor to realize each process of the method embodiment and achieve the same technical effects. To avoid repetition, details are not described herein. The computer readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0144] Figure 6 is a block diagram of an electronic device 800 shown in the present application. For example, the electronic device 800 can be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0145] Referring to Figure 6 , the electronic device 800 can include one or more of the following components: a processing component 802, a memory 804, a power supply component 806, a multimedia component 808, an audio component 810, an input / output (I / O) interface 812, a sensor component 814, and a communication component 816.

[0146] The processing component 802 generally controls the overall operation of the electronic device 800 such as operations associated with displaying, making phone calls, data communications, camera operations, and recording operations. The processing component 802 can include one or more processors 820 to execute instructions to complete all or part of steps of the above methods. In addition, the processing component 802 can include one or more modules to facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate the interaction between the multimedia component 808 and the processing component 802.

[0147] The memory 804 is configured to store various types of data to support operations of the device 800. Examples of these data include instructions for any application or method operating on the electronic device 800, contact data, phonebook data, messages, images, videos, etc. The memory 804 can be implemented by any type of volatile or non-volatile storage devices or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0148] The power component 806 provides power to the various components of the electronic device 800. The power component 806 can include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the electronic device 800.

[0149] The multimedia component 808 includes a screen providing an output interface between the electronic device 800 and a user. In some embodiments, the screen can include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes the touch panel, the screen can be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense a touch, a slide, and a gesture on the touch panel. The touch sensor can not only sense a boundary of a touching or a sliding action, but also detect duration and pressure related to the touching or sliding action. In some embodiments, the multimedia component 808 includes a front camera and / or a rear camera. When the electronic device 800 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each of the front camera and the rear camera can be a fixed optical lens system or have a focal length and optical zoom capability.

[0150] The audio component 810 is configured to output and / or input an audio signal. For example, the audio component 810 includes a microphone (MIC) configured to receive an external audio signal when the electronic device 800 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal can be further stored in the memory 804 or transmitted via the communication component 816. In some embodiments, the audio component 810 also includes a speaker for outputting an audio signal.

[0151] The I / O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which can be a keypad, a click wheel, buttons, and the like. The buttons can include, but are not limited to, a home button, a volume button, a start button, and a lock button.

[0152] The sensor component 814 includes one or more sensors for providing status assessments for various aspects of the electronic device 800. For example, the sensor component 814 can detect an open / closed position of the device 800, relative positioning of components, such as a display and a keypad of the electronic device 800, a change in position of the electronic device 800 or a component of the electronic device 800, presence or absence of user contact with the electronic device 800, orientation or acceleration / deceleration / g-force and temperature of the electronic device 800. The sensor component 814 can include an optical sensor for detecting ambient light, a proximity sensor for detecting nearby objects without any physical touch, a CMOS or CCD image sensor for use in imaging applications, or an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor in some embodiments.

[0153] The communication component 816 is configured to facilitate wired or wireless communication between the electronic device 800 and other devices. The electronic device 800 can access a wireless network based on a communication standard, such as WiFi, a cellular network (e.g., 2G, 3G, 4G, or 5G), or a combination thereof. In an example embodiment, the communication component 816 receives broadcast signals or broadcast operation information from an external broadcast management system via a broadcast channel. In an example embodiment, the communication component 816 can further include a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on Radio Frequency Identification (RFID) techniques, infrared data association (IrDA) techniques, ultra-wideband (UWB) techniques, Bluetooth (BT) techniques, and other techniques.

[0154] In an example embodiment, the electronic device 800 can be implemented using one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic elements for performing the above-described methods.

[0155] In an example embodiment, a non-transitory computer-readable storage medium including instructions, such as the memory 804 including instructions, is also provided, which can be executed by the processor 820 of the electronic device 800 to implement the above-described methods. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disc, and an optical data storage device, etc.

[0156] Figure 7is a block diagram of an electronic device 1900 shown in the present application. For example, the electronic device 1900 can be provided as a server.

[0157] Referring to Figure 7 The electronic device 1900 includes a processing component 1922, which further includes one or more processors, and a memory resource represented by a memory 1932, for storing instructions, such as an application program, executable by the processing component 1922. The application program stored in the memory 1932 can include one or more than one module each corresponding to a set of instructions. In addition, the processing component 1922 is configured to execute the instructions to perform the above-mentioned method.

[0158] The electronic device 1900 can also include a power supply component 1926 configured to perform power management of the electronic device 1900, a wired or wireless network interface 1950 configured to connect the electronic device 1900 to a network, and an input / output (I / O) interface 1958. The electronic device 1900 can operate based on an operating system stored in the memory 1932, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM or the like.

[0159] It should be noted that in this paper, the term "include", "contain" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0160] From the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment method can be realized by means of software and necessary general hardware platform, of course, it can also be realized by hardware, but in many cases the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes a plurality of instructions for making a terminal (which can be a mobile phone, computer, server, air conditioner or network device, etc.) execute the method described in each embodiment of the present application.

[0161] The embodiments of the present application are described above with reference to the accompanying drawings, but the present application is not limited to the specific embodiments described above, and the specific embodiments described above are merely illustrative, but not restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims.

[0162] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed in the embodiments of the present application can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0163] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0164] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0165] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected to achieve the purpose of the embodiments of the present application according to actual needs.

[0166] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0167] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the parts that contribute to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes various media that can store program codes, such as a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk or an optical disk, etc.

[0168] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A wind turbine generator control method characterized by, The method comprises: obtaining the actual air density of the area where the wind turbine generator is located; obtaining the target pitch angle corresponding to the maximum power generation of the wind turbine generator under the actual air density; adjusting the pitch angle of the blade in the wind turbine generator from the current pitch angle to the target pitch angle based on the pitch drive; obtaining the target torque corresponding to the maximum power generation of the wind turbine generator under the actual air density; adjusting the torque of the generator in the wind turbine generator from the current torque to the target torque based on the torque controller; The method further comprises: After obtaining the actual air density of the area where the wind turbine generator is located, determine whether the difference between the actual air density and the reference air density is greater than the preset difference; Wherein, the pitch angle corresponding to the maximum power generation of the wind turbine generator under the reference air density is the current pitch angle, and the torque corresponding to the maximum power generation of the wind turbine generator under the reference air density is the current torque; If the difference between the actual air density and the reference air density is greater than the preset difference, the step of obtaining the target pitch angle corresponding to the maximum power generation of the wind turbine generator under the actual air density is executed again, and the step of obtaining the target torque corresponding to the maximum power generation of the wind turbine generator under the actual air density is executed again; The step of obtaining the target torque corresponding to the maximum power generation of the wind turbine generator under the actual air density comprises: obtaining the target torque gain parameter corresponding to the maximum power generation of the wind turbine generator under the actual air density, and obtaining the actual speed of the generator in the wind turbine generator; calculating the target torque according to the target torque gain parameter and the actual speed; The step of obtaining the target torque gain parameter corresponding to the maximum power generation of the wind turbine generator under the actual air density comprises: obtaining the standard torque gain parameter corresponding to the maximum power generation of the wind turbine generator under the standard air density; In the case that the actual air density is the same as the standard air density, the target torque gain parameter is obtained according to the standard torque gain parameter; Or, In the case that the actual air density is different from the standard air density, obtaining the standard air density, and calculating the target torque gain parameter according to the standard air density, the actual air density and the standard torque gain parameter; The step of calculating the target torque gain parameter according to the standard air density, the actual air density and the standard torque gain parameter comprises: calculating the target torque gain parameter according to the standard air density, the actual air density and the standard torque gain parameter according to the following formula: In the above equation, K opt_real is the target torque gain parameter, K opt_std is the standard torque gain parameter, p real is the actual air density, p std is the standard air density.

2. The method of claim 1, wherein, The step of obtaining the actual air density of the area where the wind turbine generator is located comprises: obtaining the actual temperature of the area where the wind turbine generator is located, the actual air pressure of the area where the wind turbine generator is located and the actual humidity of the area where the wind turbine generator is located; calculating the actual air density according to the actual temperature, the actual air pressure and the actual humidity.

3. The method of claim 2, wherein, The calculating the actual air density according to the actual temperature, the actual air pressure and the actual humidity comprises: The calculating the actual air density according to the actual temperature, the actual air pressure and the actual humidity comprises: In the above equation, p real is the actual air density, t is the actual temperature, p is the actual air pressure, and f is the actual humidity.

4. The method of claim 1, wherein, The obtaining the target torque gain parameter corresponding to the maximum power generation of the wind turbine under the standard air density comprises: In a corresponding relationship between air density intervals and the pitch angles corresponding to the maximum power generation of the wind turbine, a pitch angle corresponding to an air density interval in which the actual air density is located is searched and taken as the target pitch angle.

5. The method of claim 1, wherein, The obtaining the target torque gain parameter corresponding to the maximum power generation of the wind turbine under the standard air density comprises: The obtaining the target torque gain parameter corresponding to the maximum power generation of the wind turbine under the standard air density comprises: The obtaining the target torque gain parameter corresponding to the maximum power generation of the wind turbine under the standard air density comprises:

6. The method of claim 5, wherein, The obtaining the target torque gain parameter corresponding to the maximum power generation of the wind turbine under the standard air density comprises: The calculating the target torque according to the target torque gain parameter and the actual rotating speed comprises: In the above equation, K opt_std is the standard torque gain parameter; C p is the optimal power coefficient; R is the rotor radius; G is the gearbox ratio; λ opt is the optimal tip speed ratio, p std is the standard air density.

7. The method of claim 1, wherein, The calculating the target torque according to the target torque gain parameter and the actual rotating speed comprises: The device comprises: In the above equation, T g is the target torque; ω g is the actual rotational speed, K opt_real is the target torque gain parameter.

8. A wind turbine generator control device characterized by comprising: The first obtaining module is configured to obtain an actual air density of a region in which a wind turbine is located. The second obtaining module is configured to obtain a target pitch angle corresponding to the maximum power generation of the wind turbine under the actual air density. The third obtaining module is configured to obtain a target torque corresponding to the maximum power generation of the wind turbine under the actual air density. The second adjusting module is configured to adjust a torque of a generator in the wind turbine from a current torque to the target torque based on a torque controller. The device further comprises: The determining module is configured to, after obtaining the actual air density of the region in which the wind turbine is located, determine whether a difference between the actual air density and a reference air density is greater than a preset difference. The current pitch angle is a pitch angle corresponding to the maximum power generation of the wind turbine under the reference air density, and the current torque is a torque corresponding to the maximum power generation of the wind turbine under the reference air density. The second obtaining module is further configured to: in a case where a difference between the actual air density and the reference air density is greater than a preset difference, re-obtain a target pitch angle corresponding to the maximum power generation of the wind turbine under the actual air density; The third obtaining module is further configured to: in a case where a difference between the actual air density and the reference air density is greater than a preset difference, re-obtain a target torque corresponding to the maximum power generation of the wind turbine under the actual air density; The third obtaining module comprises: The second obtaining unit is configured to obtain a target torque gain parameter corresponding to the maximum power generation of the wind turbine under the actual air density, and obtain an actual rotating speed of a generator in the wind turbine; The second calculation unit is configured to calculate the target torque according to the target torque gain parameter and the actual rotating speed; The second obtaining unit comprises: The first obtaining sub-unit is configured to obtain a standard torque gain parameter corresponding to the maximum power generation of the wind turbine under a standard air density; The second obtaining sub-unit is configured to, in a case where the actual air density is the same as the standard air density, obtain the target torque gain parameter according to the standard torque gain parameter; Or, The third obtaining sub-unit is configured to, in a case where the actual air density is different from the standard air density, obtain a standard air density, and the second calculation sub-unit is configured to calculate the target torque gain parameter according to the standard air density, the actual air density and the standard torque gain parameter; The second calculation sub-unit is specifically configured to: calculate the target torque gain parameter according to the standard air density, the actual air density and the standard torque gain parameter, according to the following formula: In the above equation, K opt_real is the target torque gain parameter, K opt_std is the standard torque gain parameter, p real is the actual air density, p std is the standard air density.

9. An electronic device, comprising: comprise: a processor, a memory, and a computer program stored in the memory and executable on the processor, and the computer program, when executed by the processor, implements the method in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the computer program, when executed by a processor, implements the method in any one of claims 1 to 7.

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