Method and device for obtaining control curve of wind turbine generator set

Abstract

The application provides a kind of wind turbine control curve acquisition method and device, it is related to modeling technical field.The method comprises: according to simulation pitch angle and actual pitch angle, pitch angle deviation value is calculated, and under the condition of same wind speed and same speed, simulation pitch angle of model wind turbine is adjusted according to pitch angle deviation value;When actual wind turbine power is equal to model wind turbine power, pitch angle deviation value is determined as target pitch angle deviation value, the target pitch angle deviation value is superimposed to the actual pitch angle, and the first control curve above the rated wind speed of actual wind turbine is obtained.The device executes the above method.The method and device provided in the embodiment of the application can obtain wind turbine control curve.

Description

Technical Field

[0001] The present invention relates to the technical field of modeling, and in particular to a method and device for obtaining a control curve of a wind turbine generator set. Background Art

[0002] Wind energy is a clean, renewable energy source with a strategically important position and has experienced rapid development. However, due to outdated design technologies and inappropriate site selection in the early stages, its power generation performance and operational stability lag behind those of current units. Furthermore, after a period of operation, units may experience performance degradation or require improvement. Inefficient wind turbines can be improved through retrofitting, such as by lengthening blades or installing power-enhancing accessories, or by optimizing control laws to increase performance and power generation. Extensive research has been conducted on the technical retrofitting of older units, and this has been successfully implemented and applied in some wind farms, resulting in significant efficiency gains.

[0003] However, the implementation of technical transformation measures itself also brings certain safety risks. Currently, there are many technical transformation failure incidents in the industry. Therefore, the technical transformation of wind turbines requires consistency estimation and safety verification of the performance of the units before and after the transformation. This requires the establishment of aerodynamic and structural simulation models of the wind turbines. The detailed geometric parameters required for wind turbine modeling (such as the aerodynamic parameters of the airfoil, the distribution of blade chord length, twist angle, etc. along the span) are usually unavailable due to incomplete data preservation or technical confidentiality. Therefore, it is impossible to use conventional modeling methods to accurately establish a complete model of the old wind turbine, and it is impossible to reasonably evaluate the performance of the units before and after the transformation.

[0004] Currently, when modeling a wind turbine, existing wind turbine modeling technology requires collecting detailed geometric data of the blades, aerodynamic parameters within the full angle of attack range of the airfoil used, and control laws within the full wind speed range of the turbine to complete the wind turbine modeling. If the precise geometric data of the wind turbine is missing, an accurate calculation model cannot be established, and the wind turbine control curve cannot be obtained. Summary of the Invention

[0005] In response to the problems in the prior art, embodiments of the present invention provide a method and device for obtaining a control curve of a wind turbine generator set, which can at least partially solve the problems in the prior art.

[0006] In one aspect, the present invention provides a method for obtaining a control curve of a wind turbine generator system, comprising:

[0007] Determine an actual wind energy utilization coefficient corresponding to both the actual tip speed ratio and the actual pitch angle according to a first data mapping relationship corresponding to the actual wind turbine generator set, and calculate a simulated wind energy utilization coefficient according to a rotor radius of the model wind turbine generator set, a rotor radius of the actual wind turbine generator set, and the actual wind energy utilization coefficient;

[0008] Determining a simulated pitch angle corresponding to both the simulated wind energy utilization coefficient and the simulated tip speed ratio according to a second data mapping relationship corresponding to the model wind turbine generator set;

[0009] The pitch angle deviation value is calculated based on the simulated pitch angle and the actual pitch angle, and the simulated pitch angle of the model wind turbine is adjusted according to the pitch angle deviation value under the same wind speed and the same rotation speed conditions;

[0010] The pitch angle deviation value when the actual wind turbine power is equal to the model wind turbine power is determined as the target pitch angle deviation value, and the target pitch angle deviation value is superimposed on the actual pitch angle to obtain a first control curve above the rated wind speed of the actual wind turbine.

[0011] The calculation of the simulated wind energy utilization coefficient based on the model wind turbine rotor radius, the actual wind turbine rotor radius and the actual wind energy utilization coefficient includes:

[0012] The simulated wind energy utilization coefficient is calculated according to the following formula:

[0013]

[0014] Among them, C pm To simulate the wind energy utilization coefficient, R m is the rotor radius of the model wind turbine, R is the actual rotor radius of the wind turbine, C p is the actual wind energy utilization coefficient.

[0015] The simulated tip speed ratio is calculated according to the following formula:

[0016]

[0017] Among them, λ m To simulate the tip speed ratio, n x is the xth speed, R m is the rotor radius of the model wind turbine.

[0018] The actual tip speed ratio is calculated according to the following formula:

[0019]

[0020] Among them, λ x is the actual tip speed ratio, n x is the x-th speed, and R is the actual wind turbine rotor radius.

[0021] The method for obtaining a control curve of a wind turbine generator system further comprises:

[0022] acquire the generator torque of the actual wind turbine, and acquire the second control curve below the rated wind speed of the actual wind turbine according to the corresponding relationship between the generator torque and the generator speed;

[0023] merge the first control curve and the second control curve to obtain the control curve in the full wind speed range of the actual wind turbine.

[0024] The present application provides a control curve using method based on the control curve acquisition method of the wind turbine, comprising:

[0025] The control curve is used for wind turbine control law optimization and / or fault diagnosis.

[0026] In one aspect, the present application provides a control curve acquisition device of a wind turbine, comprising:

[0027] The calculation unit is configured to determine an actual wind energy utilization coefficient corresponding to the actual tip speed ratio and the actual pitch angle according to a first data mapping relationship corresponding to the actual wind turbine, and calculate a simulation wind energy utilization coefficient according to the model wind turbine rotor radius, the actual wind turbine rotor radius and the actual wind energy utilization coefficient;

[0028] The determination unit is configured to determine a simulation pitch angle corresponding to the simulation wind energy utilization coefficient and the simulation tip speed ratio according to a second data mapping relationship corresponding to the model wind turbine;

[0029] The adjustment unit is configured to calculate a pitch angle deviation value according to the simulation pitch angle and the actual pitch angle, and adjust the simulation pitch angle of the model wind turbine according to the pitch angle deviation value under the condition of the same wind speed and the same speed;

[0030] The acquisition unit is configured to determine a target pitch angle deviation value when the actual wind turbine power is equal to the model wind turbine power, and add the target pitch angle deviation value to the actual pitch angle to obtain a first control curve above the rated wind speed of the actual wind turbine.

[0031] In still another aspect, the present application provides a computer device, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the following method when executing the computer program:

[0032] determine an actual wind energy utilization coefficient corresponding to the actual tip speed ratio and the actual pitch angle according to a first data mapping relationship corresponding to the actual wind turbine, and calculate a simulation wind energy utilization coefficient according to the model wind turbine rotor radius, the actual wind turbine rotor radius and the actual wind energy utilization coefficient;

[0033] determine the simulation pitch angle corresponding to both the simulation wind energy utilization coefficient and the simulation tip speed ratio according to a second data mapping relationship corresponding to the model wind turbine;

[0034] calculate the pitch angle deviation value according to the simulation pitch angle and the actual pitch angle, and adjust the simulation pitch angle of the model wind turbine according to the pitch angle deviation value under the condition of the same wind speed and the same rotating speed;

[0035] determine the pitch angle deviation value when the power of the actual wind turbine is equal to the power of the model wind turbine as the target pitch angle deviation value, superimpose the target pitch angle deviation value to the actual pitch angle to obtain the first control curve of the actual wind turbine above the rated wind speed.

[0036] The embodiment of the present application provides a computer readable storage medium, comprising:

[0037] The computer readable storage medium stores a computer program, and the computer program is executed by a processor to realize the following method:

[0038] determine the actual wind energy utilization coefficient corresponding to both the actual tip speed ratio and the actual pitch angle according to a first data mapping relationship corresponding to the actual wind turbine, and calculate the simulation wind energy utilization coefficient according to the wind wheel radius of the model wind turbine, the wind wheel radius of the actual wind turbine and the actual wind energy utilization coefficient;

[0039] determine the simulation pitch angle corresponding to both the simulation wind energy utilization coefficient and the simulation tip speed ratio according to a second data mapping relationship corresponding to the model wind turbine;

[0040] calculate the pitch angle deviation value according to the simulation pitch angle and the actual pitch angle, and adjust the simulation pitch angle of the model wind turbine according to the pitch angle deviation value under the condition of the same wind speed and the same rotating speed;

[0041] determine the pitch angle deviation value when the power of the actual wind turbine is equal to the power of the model wind turbine as the target pitch angle deviation value, superimpose the target pitch angle deviation value to the actual pitch angle to obtain the first control curve of the actual wind turbine above the rated wind speed.

[0042] The embodiment of the present application further provides a computer program product, the computer program product comprising a computer program, and the computer program is executed by a processor to realize the following method:

[0043] determine the actual wind energy utilization coefficient corresponding to both the actual tip speed ratio and the actual pitch angle according to a first data mapping relationship corresponding to the actual wind turbine, and calculate the simulation wind energy utilization coefficient according to the wind wheel radius of the model wind turbine, the wind wheel radius of the actual wind turbine and the actual wind energy utilization coefficient;

[0044] Determining a simulated pitch angle corresponding to both the simulated wind energy utilization coefficient and the simulated tip speed ratio according to a second data mapping relationship corresponding to the model wind turbine generator set;

[0045] The pitch angle deviation value is calculated based on the simulated pitch angle and the actual pitch angle, and the simulated pitch angle of the model wind turbine is adjusted according to the pitch angle deviation value under the same wind speed and the same rotation speed conditions;

[0046] The pitch angle deviation value when the actual wind turbine power is equal to the model wind turbine power is determined as the target pitch angle deviation value, and the target pitch angle deviation value is superimposed on the actual pitch angle to obtain a first control curve above the rated wind speed of the actual wind turbine.

[0047] The control curve acquisition method and device of a wind turbine provided by an embodiment of the present invention determine the actual wind energy utilization coefficient corresponding to both the actual tip speed ratio and the actual pitch angle according to a first data mapping relationship corresponding to the actual wind turbine, and calculate the simulated wind energy utilization coefficient according to the rotor radius of the model wind turbine, the rotor radius of the actual wind turbine and the actual wind energy utilization coefficient; determine the simulated pitch angle corresponding to both the simulated wind energy utilization coefficient and the simulated tip speed ratio according to a second data mapping relationship corresponding to the model wind turbine; calculate the pitch angle deviation value according to the simulated pitch angle and the actual pitch angle, and adjust the simulated pitch angle of the model wind turbine according to the pitch angle deviation value under the same wind speed and the same rotation speed conditions; determine the pitch angle deviation value when the actual wind turbine power is equal to the model wind turbine power as the target pitch angle deviation value, and superimpose the target pitch angle deviation value on the actual pitch angle to obtain a first control curve above the rated wind speed of the actual wind turbine, so that the wind turbine control curve can be obtained even if the precise geometric data of the wind turbine is missing. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0049] Figure 1 The figure is a flow chart of a method for obtaining a control curve of a wind turbine generator system provided by an embodiment of the present invention.

[0050] Figure 2 This is a Cp-λ relationship curve diagram of an actual wind turbine generator system provided by an embodiment of the present invention.

[0051] Figure 3It is a schematic diagram of a process for determining a pitch angle deviation value provided by an embodiment of the present invention.

[0052] Figure 4 This is a first control curve diagram after superimposing the target pitch angle deviation value provided by an embodiment of the present invention.

[0053] Figure 5 This is a graph showing actual wind turbine generator torque and speed control according to an embodiment of the present invention.

[0054] Figure 6 It is a structural schematic diagram of a control curve acquisition device for a wind turbine generator system provided by an embodiment of the present invention.

[0055] Figure 7 A schematic diagram of the physical structure of a computer device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0056] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention. It should be noted that, unless there is a conflict, the embodiments and features in the embodiments of this application can be combined with each other in any manner.

[0057] Figure 1 FIG. 1 is a flow chart of a method for obtaining a control curve of a wind turbine generator system according to an embodiment of the present invention. Figure 1 As shown, the control curve acquisition method of a wind turbine generator system provided by an embodiment of the present invention includes:

[0058] Step S1: Determine the actual wind energy utilization coefficient corresponding to the actual tip speed ratio and the actual pitch angle based on the first data mapping relationship corresponding to the actual wind turbine generator set, and calculate the simulated wind energy utilization coefficient based on the rotor radius of the model wind turbine generator set, the rotor radius of the actual wind turbine generator set and the actual wind energy utilization coefficient.

[0059] Step S2: determining a simulated pitch angle corresponding to both the simulated wind energy utilization coefficient and the simulated tip speed ratio according to a second data mapping relationship corresponding to the model wind turbine generator set.

[0060] Step S3: Calculate a pitch angle deviation value based on the simulated pitch angle and the actual pitch angle, and adjust the simulated pitch angle of the model wind turbine according to the pitch angle deviation value under the same wind speed and the same rotation speed conditions.

[0061] Step S4: determining the pitch angle deviation value when the actual wind turbine power is equal to the model wind turbine power as the target pitch angle deviation value, and superimposing the target pitch angle deviation value on the actual pitch angle to obtain a first control curve above the rated wind speed of the actual wind turbine.

[0062] In the above step S1, the device determines the actual wind energy utilization coefficient corresponding to the actual tip speed ratio and the actual pitch angle based on the first data mapping relationship corresponding to the actual wind turbine, and calculates the simulated wind energy utilization coefficient based on the rotor radius of the model wind turbine, the rotor radius of the actual wind turbine and the actual wind energy utilization coefficient. The device can be a computer device that executes the method, such as a server. The acquisition, storage, use, and processing of data in the technical solution of this application comply with the relevant provisions of national laws and regulations. The actual wind turbine can be understood as the wind turbine that needs to be modeled. The power performance parameters of the actual wind turbine at different pitch angles ξ, full wind speeds, and full speeds can be collected, and a functional relationship or scatter table of P=P(v, n, ξ) can be constructed, where P is the actual unit power during operation, v is the wind speed, n is the rotor speed (corresponding to "speed"), and ξ is the pitch angle.

[0063] The specific instructions are as follows:

[0064] Determine the rotor speed range n_min-n_max, the cut-in and cut-out wind speed range v_in-v_out, the rotor radius R and the rated power. The rated power can be taken from the unit power P during actual operation.

[0065] Collect the power performance parameters of actual wind turbines at different pitch angles, wind speeds, and rotational speeds, and construct a functional relationship or scatter table of P = P(v, n, ξ). The range of pitch angle, wind speed, and rotational speed should cover as many operating conditions as possible during actual operation. The functional relationship or scatter table of P = P(v, n, ξ) can also be replaced by the relationship or scatter table of Cp = Cp(λ, ξ);

[0066] Among them, Cp is the actual wind energy utilization coefficient, and λ is the actual tip speed ratio.

[0067] For example, the rated power of an actual wind turbine is 3.4MW, the rotor radius is 70m, the rotor speed range is 6.5-11.3rpm, the wind speed range is 3.5-25m / s, and the tip speed ratio range is 3-18. The Cp(λ,ξ) curve is drawn as follows: Figure 2 shown.

[0068] The first data mapping relationship can be as follows Figure 2 The corresponding relationship between Cp, λ and three is shown, and the value of ξ corresponds to Figure 2 The angle value in the equation is that if any two of the three are known, we can Figure 2 The curve shown determines another one.

[0069] It is also necessary to determine a model wind turbine with a detailed geometric shape. The rated power of the model wind turbine must be greater than the rated power of the actual wind turbine. Calculate the power value of the model wind turbine at different pitch angles under full wind speed and full speed range to obtain P m =P m (v, n, ξ) functional relationship or scatter table, or calculate the simulated wind energy utilization coefficient C under the full blade tip speed ratio range pm =C pm (ξ, λ). The full wind speed and full speed range refers to the same wind speed and speed range as the actual wind turbine. The full tip speed ratio range can be converted according to the actual wind turbine tip speed ratio range: (λ min ~λ max )×R m / R;

[0070] where λ min and λ max are the minimum and maximum tip speed ratios of actual wind turbines, R m is the rotor radius of the model wind turbine.

[0071] If a NREL 5MW wind turbine with publicly available geometric data is used as a model wind turbine, and the rotor radius of the model wind turbine is 63m, then the full wind speed range that needs to be calculated is 3.5-25m / s, the full rotation speed is 6.5-11.3rpm, and the tip speed ratio range is 2.7-16.2. The actual wind turbine and the model wind turbine are operated at the same wind speed and rotation speed. The pitch angle ξ of the model wind turbine is adjusted by adjusting the pitch angle deviation value Δξ so that the power of the actual wind turbine and the model wind turbine is the same, that is, P(v, n, ξ) = P m (v, n, ξ+Δξ), the determination process of Δξ is as follows Figure 3 shown.

[0072] The step of calculating the simulated wind energy utilization coefficient based on the model wind turbine rotor radius, the actual wind turbine rotor radius, and the actual wind energy utilization coefficient includes:

[0073] The simulated wind energy utilization coefficient is calculated according to the following formula:

[0074]

[0075] Among them, C pm To simulate the wind energy utilization coefficient, R m is the rotor radius of the model wind turbine, R is the actual rotor radius of the wind turbine, C p is the actual wind energy utilization coefficient.

[0076] The actual tip speed ratio is calculated according to the following formula:

[0077]

[0078] wherein λ x is the actual tip speed ratio, n x is the xth rotational speed, and R is the actual wind turbine rotor radius.

[0079] In the above step S2, the device determines the simulation pitch angle corresponding to both the simulation wind energy utilization coefficient and the simulation tip speed ratio according to the second data mapping relationship corresponding to the model wind turbine. The second data mapping relationship can refer to the curve shown in Figure 2 , the difference being that the numerical values are different, and the simulation pitch angle is ξ m .

[0080] The simulation tip speed ratio is calculated according to the following formula:

[0081]

[0082] wherein λ m is the simulation tip speed ratio, n x is the xth rotational speed, and R m is the rotor radius of the model wind turbine. The xth rotational speed corresponds to the xth wind speed and the xth pitch angle, wherein the total number of rotational speeds can be denoted as i, the total number of wind speeds can be denoted as j, and the total number of pitch angles can be denoted as k, i, j, and k can be the same or different. Figure 3 Figure 3 In the above step S3, the device calculates the pitch angle deviation value according to the simulation pitch angle and the actual pitch angle, and adjusts the simulation pitch angle of the model wind turbine according to the pitch angle deviation value under the condition of the same wind speed and the same rotational speed. The difference between the simulation pitch angle ξ m and ξ is taken as the pitch angle deviation value Δξ, and by , the Δξ corresponding to each (n x , v x , ξ x ) can be obtained.

[0083] Figure 3 In the above step S4, the device determines the pitch angle deviation value when the actual wind turbine power is equal to the model wind turbine power as the target pitch angle deviation value, and superimposes the target pitch angle deviation value on the actual pitch angle to obtain the first control curve of the actual wind turbine above the rated wind speed. The target pitch angle deviation value Δξ' is superimposed on ξ, that is, ξ = ξ + Δξ' is substituted into ξ in P = P(v, n, ξ), and the first control curve of the actual wind turbine above the rated wind speed can be calculated, as shown in

[0084] In the above step S4, the device determines the pitch angle deviation value when the actual wind turbine power is equal to the model wind turbine power as the target pitch angle deviation value, and superimposes the target pitch angle deviation value on the actual pitch angle to obtain the first control curve of the actual wind turbine above the rated wind speed. The target pitch angle deviation value Δξ' is superimposed on ξ, that is, ξ = ξ + Δξ' is substituted into ξ in P = P(v, n, ξ), and the first control curve of the actual wind turbine above the rated wind speed can be calculated, as shown in Figure 4 Figure 4 ​​The upper middle curve is the first control curve after superimposing the target pitch angle deviation value.

[0085] The method for obtaining a control curve of a wind turbine generator set further includes:

[0086] The generator torque of the actual wind turbine is obtained, and a second control curve below the rated wind speed of the actual wind turbine is obtained according to the corresponding relationship between the generator torque and the generator speed.

[0087] The actual wind turbine generator torque can be calculated according to the following formula:

[0088] T e =9549×P / n gen

[0089] Among them, T e is the actual generator torque of the wind turbine, P is the actual power of the wind turbine during operation, n gen is the generator speed.

[0090] The corresponding relationship between the generator torque and the generator speed can be input into the existing tool software, and the second control curve below the rated wind speed of the actual wind turbine can be obtained through the existing tool software, such as Figure 5 shown.

[0091] The first control curve and the second control curve are combined to obtain a control curve within the full wind speed range of the actual wind turbine.

[0092] An embodiment of the present invention provides a method for using a control curve based on the above-mentioned method for obtaining a control curve of a wind turbine generator, comprising:

[0093] The control curve is used to optimize the control law of the wind turbine generator set and / or perform fault diagnosis.

[0094] In response to the problem of missing precise geometric data of wind turbines and inability to establish precise calculation models, the control curve acquisition method for wind turbines provided in an embodiment of the present invention establishes an aerodynamic model of the wind turbine (corresponding to the model wind turbine) and a control model (first control curve and second control curve) through data mapping, which can perform relatively accurate modeling under the premise that the detailed geometric shape of the wind wheel cannot be obtained; at the same time, the present invention can be used in subsequent optimization of wind turbine control laws, fault diagnosis, and other occasions where an aerodynamic model needs to be established.

[0095] The control curve acquisition method of a wind turbine provided by an embodiment of the present invention determines an actual wind energy utilization coefficient corresponding to both an actual tip speed ratio and an actual pitch angle according to a first data mapping relationship corresponding to an actual wind turbine, and calculates a simulated wind energy utilization coefficient according to a rotor radius of a model wind turbine, a rotor radius of an actual wind turbine and the actual wind energy utilization coefficient; determines a simulated pitch angle corresponding to both the simulated wind energy utilization coefficient and the simulated tip speed ratio according to a second data mapping relationship corresponding to the model wind turbine; calculates a pitch angle deviation value according to the simulated pitch angle and the actual pitch angle, and adjusts the simulated pitch angle of the model wind turbine according to the pitch angle deviation value under the same wind speed and the same rotation speed conditions; determines the pitch angle deviation value when the actual wind turbine power is equal to the model wind turbine power as a target pitch angle deviation value, and superimposes the target pitch angle deviation value on the actual pitch angle to obtain a first control curve above the rated wind speed of the actual wind turbine, which can achieve the purpose of obtaining a wind turbine control curve even if there is a lack of precise geometric data of the wind turbine.

[0096] Furthermore, the calculation of the simulated wind energy utilization coefficient based on the model wind turbine rotor radius, the actual wind turbine rotor radius and the actual wind energy utilization coefficient includes:

[0097] The simulated wind energy utilization coefficient is calculated according to the following formula:

[0098]

[0099] Among them, C pm To simulate the wind energy utilization coefficient, R m is the rotor radius of the model wind turbine, R is the actual rotor radius of the wind turbine, C p is the actual wind energy utilization coefficient. Please refer to the above description and do not elaborate on it again.

[0100] Furthermore, the simulated tip speed ratio is calculated according to the following formula:

[0101]

[0102] Among them, λ m To simulate the tip speed ratio, n x is the xth speed, R m is the radius of the rotor of the model wind turbine. Please refer to the above description and do not elaborate on it here.

[0103] Furthermore, the actual tip speed ratio is calculated according to the following formula:

[0104]

[0105] Among them, λ x is the actual tip speed ratio, n xis the x-th speed, and R is the actual wind turbine rotor radius. For details, please refer to the above description and will not be repeated here.

[0106] Furthermore, the method for obtaining a control curve of a wind turbine generator system further includes:

[0107] The generator torque of the actual wind turbine is obtained, and the second control curve below the rated wind speed of the actual wind turbine is obtained according to the corresponding relationship between the generator torque and the generator speed; please refer to the above description and no further details will be given.

[0108] The first control curve and the second control curve are combined to obtain a control curve within the full wind speed range of the actual wind turbine.

[0109] Furthermore, the present invention provides a method for using a control curve based on the above-mentioned method for obtaining a control curve of a wind turbine generator system, comprising:

[0110] The control curve is used to optimize the control law of the wind turbine and / or diagnose faults. Please refer to the above description and no further details will be given.

[0111] Figure 6 FIG. 1 is a schematic diagram of a control curve acquisition device for a wind turbine generator system according to an embodiment of the present invention. Figure 6 As shown, the control curve acquisition device for a wind turbine provided by an embodiment of the present invention includes a calculation unit 601, a determination unit 602, an adjustment unit 603, and an acquisition unit 604, wherein:

[0112] The calculation unit 601 is used to determine the actual wind energy utilization coefficient corresponding to the actual tip speed ratio and the actual pitch angle according to the first data mapping relationship corresponding to the actual wind turbine generator set, and calculate the simulated wind energy utilization coefficient according to the rotor radius of the model wind turbine generator set, the rotor radius of the actual wind turbine generator set and the actual wind energy utilization coefficient; the determination unit 602 is used to determine the simulated pitch angle corresponding to the simulated wind energy utilization coefficient and the simulated tip speed ratio according to the second data mapping relationship corresponding to the model wind turbine generator set; the adjustment unit 603 is used to calculate the pitch angle deviation value according to the simulated pitch angle and the actual pitch angle, and adjust the simulated pitch angle of the model wind turbine generator set according to the pitch angle deviation value under the same wind speed and the same speed conditions; the acquisition unit 604 is used to determine the pitch angle deviation value when the actual wind turbine generator set power is equal to the model wind turbine generator set power as the target pitch angle deviation value, and superimpose the target pitch angle deviation value on the actual pitch angle to obtain a first control curve above the rated wind speed of the actual wind turbine generator set.

[0113] Specifically, the calculation unit 601 in the device is used to determine the actual wind energy utilization coefficient corresponding to the actual tip speed ratio and the actual pitch angle according to the first data mapping relationship corresponding to the actual wind turbine generator set, and calculate the simulated wind energy utilization coefficient according to the rotor radius of the model wind turbine generator set, the rotor radius of the actual wind turbine generator set and the actual wind energy utilization coefficient; the determination unit 602 is used to determine the simulated pitch angle corresponding to the simulated wind energy utilization coefficient and the simulated tip speed ratio according to the second data mapping relationship corresponding to the model wind turbine generator set; the adjustment unit 603 is used to calculate the pitch angle deviation value according to the simulated pitch angle and the actual pitch angle, and adjust the simulated pitch angle of the model wind turbine generator set according to the pitch angle deviation value under the same wind speed and the same speed conditions; the acquisition unit 604 is used to determine the pitch angle deviation value when the actual wind turbine generator set power is equal to the model wind turbine generator set power as the target pitch angle deviation value, and superimpose the target pitch angle deviation value on the actual pitch angle to obtain a first control curve above the rated wind speed of the actual wind turbine generator set.

[0114] The control curve acquisition device of a wind turbine provided by an embodiment of the present invention determines an actual wind energy utilization coefficient corresponding to both an actual tip speed ratio and an actual pitch angle according to a first data mapping relationship corresponding to an actual wind turbine, and calculates a simulated wind energy utilization coefficient according to a rotor radius of a model wind turbine, a rotor radius of an actual wind turbine and the actual wind energy utilization coefficient; determines a simulated pitch angle corresponding to both the simulated wind energy utilization coefficient and the simulated tip speed ratio according to a second data mapping relationship corresponding to the model wind turbine; calculates a pitch angle deviation value according to the simulated pitch angle and the actual pitch angle, and adjusts the simulated pitch angle of the model wind turbine according to the pitch angle deviation value under the same wind speed and the same rotation speed conditions; determines the pitch angle deviation value when the actual wind turbine power is equal to the model wind turbine power as a target pitch angle deviation value, and superimposes the target pitch angle deviation value on the actual pitch angle to obtain a first control curve above the rated wind speed of the actual wind turbine, so that the wind turbine control curve can be obtained even if there is a lack of precise geometric data of the wind turbine.

[0115] Furthermore, the calculation unit 601 is specifically configured to:

[0116] The simulated wind energy utilization coefficient is calculated according to the following formula:

[0117]

[0118] Among them, C pm To simulate the wind energy utilization coefficient, R m is the rotor radius of the model wind turbine, R is the actual rotor radius of the wind turbine, C p is the actual wind energy utilization coefficient.

[0119] Furthermore, the determining unit 602 is specifically configured to:

[0120]

[0121] Among them, λ m To simulate the tip speed ratio, n x is the xth speed, R m is the rotor radius of the model wind turbine.

[0122] Furthermore, the calculation unit 601 is specifically configured to:

[0123]

[0124] Among them, λ x is the actual tip speed ratio, n x is the x-th speed, and R is the actual wind turbine rotor radius.

[0125] Furthermore, the control curve acquisition device of the wind turbine generator set is further used for:

[0126] Obtaining the actual generator torque of the wind turbine generator set, and obtaining a second control curve below the rated wind speed of the actual wind turbine generator set according to the corresponding relationship between the generator torque and the generator speed;

[0127] The first control curve and the second control curve are combined to obtain a control curve within the full wind speed range of the actual wind turbine.

[0128] Furthermore, the present invention provides a control curve using device based on the control curve acquiring device of the wind turbine generator set, wherein the control curve using device is used to:

[0129] The control curve is used to optimize the control law of the wind turbine generator set and / or perform fault diagnosis.

[0130] The embodiment of the control curve acquisition device for a wind turbine generator system provided by the present invention can be used to execute the processing flow of the above-mentioned method embodiments. Its functions are not described in detail here, and reference can be made to the detailed description of the above-mentioned method embodiments.

[0131] Figure 7 A schematic diagram of the physical structure of a computer device provided in an embodiment of the present invention is shown in FIG. Figure 7 As shown, the computer device includes: a memory 701, a processor 702, and a computer program stored in the memory 701 and executable on the processor 702. When the processor 702 executes the computer program, the following method is implemented:

[0132] Determine an actual wind energy utilization coefficient corresponding to both the actual tip speed ratio and the actual pitch angle according to a first data mapping relationship corresponding to the actual wind turbine generator set, and calculate a simulated wind energy utilization coefficient according to a rotor radius of the model wind turbine generator set, a rotor radius of the actual wind turbine generator set, and the actual wind energy utilization coefficient;

[0133] Determining a simulated pitch angle corresponding to both the simulated wind energy utilization coefficient and the simulated tip speed ratio according to a second data mapping relationship corresponding to the model wind turbine generator set;

[0134] The pitch angle deviation value is calculated based on the simulated pitch angle and the actual pitch angle, and the simulated pitch angle of the model wind turbine is adjusted according to the pitch angle deviation value under the same wind speed and the same rotation speed conditions;

[0135] The pitch angle deviation value when the actual wind turbine power is equal to the model wind turbine power is determined as the target pitch angle deviation value, and the target pitch angle deviation value is superimposed on the actual pitch angle to obtain a first control curve above the rated wind speed of the actual wind turbine.

[0136] This embodiment discloses a computer program product, which includes a computer program. When the computer program is executed by a processor, the following method is implemented:

[0137] Determine an actual wind energy utilization coefficient corresponding to both the actual tip speed ratio and the actual pitch angle according to a first data mapping relationship corresponding to the actual wind turbine generator set, and calculate a simulated wind energy utilization coefficient according to a rotor radius of the model wind turbine generator set, a rotor radius of the actual wind turbine generator set, and the actual wind energy utilization coefficient;

[0138] Determining a simulated pitch angle corresponding to both the simulated wind energy utilization coefficient and the simulated tip speed ratio according to a second data mapping relationship corresponding to the model wind turbine generator set;

[0139] The pitch angle deviation value is calculated based on the simulated pitch angle and the actual pitch angle, and the simulated pitch angle of the model wind turbine is adjusted according to the pitch angle deviation value under the same wind speed and the same rotation speed conditions;

[0140] The pitch angle deviation value when the actual wind turbine power is equal to the model wind turbine power is determined as the target pitch angle deviation value, and the target pitch angle deviation value is superimposed on the actual pitch angle to obtain a first control curve above the rated wind speed of the actual wind turbine.

[0141] This embodiment provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program. When the computer program is executed by a processor, the following method is implemented:

[0142] Determine an actual wind energy utilization coefficient corresponding to both the actual tip speed ratio and the actual pitch angle according to a first data mapping relationship corresponding to the actual wind turbine generator set, and calculate a simulated wind energy utilization coefficient according to a rotor radius of the model wind turbine generator set, a rotor radius of the actual wind turbine generator set, and the actual wind energy utilization coefficient;

[0143] Determining a simulated pitch angle corresponding to both the simulated wind energy utilization coefficient and the simulated tip speed ratio according to a second data mapping relationship corresponding to the model wind turbine generator set;

[0144] The pitch angle deviation value is calculated based on the simulated pitch angle and the actual pitch angle, and the simulated pitch angle of the model wind turbine is adjusted according to the pitch angle deviation value under the same wind speed and the same rotation speed conditions;

[0145] The pitch angle deviation value when the actual wind turbine power is equal to the model wind turbine power is determined as the target pitch angle deviation value, and the target pitch angle deviation value is superimposed on the actual pitch angle to obtain a first control curve above the rated wind speed of the actual wind turbine.

[0146] Compared with the technical solutions in the prior art, the embodiments of the present invention determine the actual wind energy utilization coefficient corresponding to the actual tip speed ratio and the actual pitch angle according to the first data mapping relationship corresponding to the actual wind turbine generator set, and calculate the simulated wind energy utilization coefficient according to the rotor radius of the model wind turbine generator set, the rotor radius of the actual wind turbine generator set and the actual wind energy utilization coefficient; determine the simulated pitch angle corresponding to the simulated wind energy utilization coefficient and the simulated tip speed ratio according to the second data mapping relationship corresponding to the model wind turbine generator set; calculate the pitch angle deviation value according to the simulated pitch angle and the actual pitch angle, and adjust the simulated pitch angle of the model wind turbine generator set according to the pitch angle deviation value under the same wind speed and the same speed conditions; determine the pitch angle deviation value when the actual wind turbine generator set power is equal to the model wind turbine generator set power as the target pitch angle deviation value, and superimpose the target pitch angle deviation value on the actual pitch angle to obtain a first control curve above the rated wind speed of the actual wind turbine generator set, so that the wind turbine generator set control curve can be obtained even if the precise geometric data of the wind turbine generator set is missing.

[0147] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0148] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0149] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0150] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 Figure 1 A step that specifies a function in one or more boxes.

[0151] Throughout this specification, reference to terms such as "one embodiment," "a specific embodiment," "some embodiments," "for example," "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 invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0152] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for obtaining a control curve of a wind turbine generator system, characterized in that: include: Determine an actual wind energy utilization coefficient corresponding to both the actual tip speed ratio and the actual pitch angle according to a first data mapping relationship corresponding to the actual wind turbine generator set, and calculate a simulated wind energy utilization coefficient according to a rotor radius of the model wind turbine generator set, a rotor radius of the actual wind turbine generator set, and the actual wind energy utilization coefficient; Determining a simulated pitch angle corresponding to both the simulated wind energy utilization coefficient and the simulated tip speed ratio according to a second data mapping relationship corresponding to the model wind turbine generator set; The pitch angle deviation value is calculated based on the simulated pitch angle and the actual pitch angle, and the simulated pitch angle of the model wind turbine is adjusted according to the pitch angle deviation value under the same wind speed and the same rotation speed conditions; Determine the pitch angle deviation value when the actual wind turbine power is equal to the model wind turbine power as the target pitch angle deviation value, and superimpose the target pitch angle deviation value on the actual pitch angle to obtain a first control curve for the wind turbine power above the rated wind speed of the actual wind turbine; The method for obtaining a control curve of a wind turbine generator set further includes: Obtaining the actual generator torque of the wind turbine generator set, and obtaining a second control curve below the rated wind speed of the actual wind turbine generator set according to the corresponding relationship between the generator torque and the generator speed; Combining the first control curve and the second control curve to obtain a control curve within the full wind speed range of the actual wind turbine; The control curve is used to optimize the control law of the wind turbine generator set and / or perform fault diagnosis.

2. The method for obtaining a control curve of a wind turbine according to claim 1, characterized in that: The step of calculating the simulated wind energy utilization coefficient based on the model wind turbine rotor radius, the actual wind turbine rotor radius, and the actual wind energy utilization coefficient includes: The simulated wind energy utilization coefficient is calculated according to the following formula: Among them, C pm To simulate the wind energy utilization coefficient, R m is the rotor radius of the model wind turbine, R is the actual rotor radius of the wind turbine, C p is the actual wind energy utilization coefficient.

3. The method for obtaining a control curve of a wind turbine according to claim 1, wherein: The simulated tip speed ratio is calculated according to the following formula: Among them, λ m To simulate the tip speed ratio, n x is the xth speed, R m is the rotor radius of the model wind turbine.

4. The method for obtaining a control curve of a wind turbine according to claim 1, wherein: The actual tip speed ratio is calculated according to the following formula: Among them, λ x is the actual tip speed ratio, n x is the x-th speed, and R is the actual wind turbine rotor radius.

5. A control curve acquisition device for a wind turbine generator system, characterized in that: include: a calculation unit, configured to determine an actual wind energy utilization coefficient corresponding to both the actual tip speed ratio and the actual pitch angle according to a first data mapping relationship corresponding to the actual wind turbine generator set, and calculate a simulated wind energy utilization coefficient according to a rotor radius of the model wind turbine generator set, a rotor radius of the actual wind turbine generator set, and the actual wind energy utilization coefficient; a determining unit, configured to determine a simulated pitch angle corresponding to both the simulated wind energy utilization coefficient and the simulated tip speed ratio according to a second data mapping relationship corresponding to the model wind turbine generator set; an adjustment unit, configured to calculate a pitch angle deviation value based on the simulated pitch angle and the actual pitch angle, and adjust the simulated pitch angle of the model wind turbine according to the pitch angle deviation value under the same wind speed and the same rotation speed conditions; an acquisition unit, configured to determine a pitch angle deviation value when the actual wind turbine generator set power is equal to the model wind turbine generator set power as a target pitch angle deviation value, and superimpose the target pitch angle deviation value on the actual pitch angle to obtain a first control curve for the turbine generator set power above the rated wind speed of the actual wind turbine generator set; The control curve acquisition device of the wind turbine generator set is further used for: Obtaining the actual generator torque of the wind turbine generator set, and obtaining a second control curve below the rated wind speed of the actual wind turbine generator set according to the corresponding relationship between the generator torque and the generator speed; Combining the first control curve and the second control curve to obtain a control curve within the full wind speed range of the actual wind turbine; The control curve is used to optimize the control law of the wind turbine generator set and / or perform fault diagnosis.

6. A computer 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 computer program, the method according to any one of claims 1 to 4 is implemented.

7. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

8. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

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