WO2023045121A1

WO2023045121A1 - Power control method and device for wind generating set

Info

Publication number: WO2023045121A1
Application number: PCT/CN2021/138299
Authority: WO
Inventors: 曹学铭; 余梦婷; 肖硕文; 刘忠朋; 张虓赫; 张田野
Original assignee: 北京金风科创风电设备有限公司
Priority date: 2021-09-22
Filing date: 2021-12-15
Publication date: 2023-03-30
Also published as: CN115839304A

Abstract

A power control method for a wind generating set, comprising: acquiring an ambient temperature, rotational speed, and pitch angle of the wind generating set during running (S101); determining electrical boundary power of the wind generating set according to the ambient temperature and the rotational speed (S102); determining stall boundary power of the wind generating set according to the ambient temperature, the rotational speed, and the pitch angle (S103); determining set power of the wind generating set according to the electrical boundary power and the stall boundary power of the wind generating set (S104); and controlling output of the wind generating set according to the set power (S105). The set power of the set is adjusted according to the ambient temperature, the electric generating capacity is improved when the temperature is low, and the safety of the set is ensured when the temperature is high, thereby improving the competence of the set. Also involved are a power control device for a wind generating set, a computer readable storage medium, a computing device, and a computer program product.

Description

Wind turbine power control method and device

technical field

The present disclosure relates to the technical field of wind power generation. More specifically, the present disclosure relates to a power control method and device for a wind turbine.

Background technique

According to wind power market research and unit economic evaluation, the basic operating parameters of the unit, such as power, speed, torque, etc., will be initially determined in the development stage of the whole unit, and then the related hardware equipment of the unit will also be selected according to the operating parameters of the unit and relevant standards. Determination and structural design to ensure safe operation of the unit. In the development of the whole machine, the hardware equipment and structure are generally designed according to the standard environmental parameters or scope to meet the operating requirements of the unit and meet the cost requirements. Therefore, there are relatively strict and clear operating boundaries for the hardware equipment or structure of the unit. However, due to the fact that the hardware equipment or structural performance will be affected by the actual environment, the power boundary of the unit will also change.

Contents of the invention

Exemplary embodiments of the present disclosure are to provide a power control method and device for a wind turbine unit, to adjust the set power of the unit according to the actual ambient temperature, to increase the power generation when the temperature is low, and to ensure the safety of the unit when the temperature is high, so as to increase the power of the unit. competitiveness.

According to one or more exemplary embodiments, a power control method of a wind turbine is provided, including: acquiring the ambient temperature, rotation speed and pitch angle of the wind turbine during operation; determining the electrical boundary of the wind turbine based on the ambient temperature and rotation speed Power; determine the stall boundary power of the wind turbine based on the ambient temperature, rotational speed and pitch angle; determine the set power of the wind turbine based on the electrical boundary power and stall boundary power of the wind turbine; control the wind turbine according to the set power output of the unit.

According to one or more exemplary embodiments, there is provided a power control device for a wind turbine, including: a data acquisition unit configured to acquire the ambient temperature, rotational speed and pitch angle of the wind turbine during operation; a first power determination unit, It is configured to determine the electrical boundary power of the wind turbine based on the ambient temperature and the rotational speed; the second power determination unit is configured to determine the stall boundary power of the wind turbine based on the ambient temperature, rotational speed and pitch angle; the set power is determined A unit configured to determine a set power of the wind turbine based on the electrical boundary power and the stall boundary power of the wind turbine; and an output control unit configured to control the output of the wind turbine according to the set power.

According to one or more exemplary embodiments, there is provided a computer-readable storage medium on which computer program instructions are stored, and when the computer program instructions are executed by a processor, the wind power system according to the exemplary embodiments of the present disclosure is realized. The power control method of the unit.

According to one or more exemplary embodiments, there is provided a computing device, comprising: at least one processor; at least one memory storing computer program instructions, when the computer program instructions are executed by the at least one processor, the A power control method for a wind turbine according to an exemplary embodiment of the present disclosure.

According to one or more exemplary embodiments, a computer program product is provided, and instructions in the computer program product can be executed by a processor of a computer device to implement a power control method for a wind turbine according to an exemplary embodiment of the present disclosure.

According to the power control method and device of a wind turbine set in one or more exemplary embodiments, by obtaining the ambient temperature, rotation speed and pitch angle of the wind turbine set during operation, the electrical boundary power of the wind turbine set is determined based on the ambient temperature and rotation speed, Determine the stall boundary power of the wind turbine based on the ambient temperature, rotational speed and pitch angle, determine the set power of the wind turbine based on the electrical boundary power and the stall boundary power of the wind turbine, and control the wind turbine according to the set power The output can adjust the set power of the unit according to the actual ambient temperature, increase the power generation when the temperature is low, and ensure the safety of the unit when the temperature is high, thereby enhancing the competitiveness of the unit.

Additional aspects and/or advantages of the general inventive concept of the present disclosure will be partially set forth in the following description, and some of them will be clear from the description, or can be learned through implementation of the general inventive concept of the present disclosure.

Description of drawings

The above and other objects and features of exemplary embodiments of the present disclosure will become more apparent through the following description in conjunction with the accompanying drawings exemplarily showing the embodiments, in which:

Fig. 1A shows a flowchart of a power control method of a wind turbine according to one or more exemplary embodiments;

Fig. 1B shows a logic diagram of power control of a wind turbine according to one or more exemplary embodiments;

Fig. 2 shows a block diagram of a power control device of a wind turbine according to one or more exemplary embodiments;

Fig. 3 shows a block diagram of a first power determination unit according to one or more exemplary embodiments;

Fig. 4 shows a block diagram of a power control device of a wind turbine according to one or more exemplary embodiments; and

FIG. 5 illustrates a schematic diagram of a computing device according to one or more exemplary embodiments.

Detailed ways

Reference will now be made in detail to the exemplary embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like numerals refer to like elements throughout. The embodiments are described below in order to explain the present disclosure by referring to the figures.

Referring to FIG. 1 , in step S101 , the ambient temperature, rotational speed and pitch angle of the wind turbine during operation are obtained.

In one or more exemplary embodiments of the present disclosure, the ambient temperature may be acquired by an ambient temperature sensor installed outside the nacelle of the wind turbine. Specifically, depending on the configuration of the wind turbine, there will be two situations: one is equipped with one set of ambient temperature sensors, and the other is equipped with two sets of ambient temperature sensors. If it is equipped with a set of sensors, when there is no abnormality in the sensor and temperature data, use the temperature data to calculate the electrical boundary power; The temperature data is used to calculate the electrical boundary power. Otherwise, when it is judged that there is no abnormality in the spare sensor and temperature data, the temperature data is used to calculate the electrical boundary power. Otherwise, the calculation output is not performed.

In step S102, the electrical boundary power of the wind turbine is determined based on the ambient temperature and the rotational speed.

In one or more exemplary embodiments of the present disclosure, when determining the electrical boundary power of the wind turbine based on the ambient temperature and rotational speed, the electrical boundary current of a predetermined component of the wind turbine may be firstly determined based on the ambient temperature, where the predetermined component may be Including at least one of a generator, a converter and a cable. Then determine the minimum value among the electrical boundary currents of the predetermined components as the electrical boundary current of the wind turbine, and determine the electrical boundary power of the wind turbine based on the ambient temperature, the rotational speed and the electrical boundary current of the wind turbine. For example, when the generator, converter, and cable are all determined as predetermined components, the minimum value among the electrical boundary current of the generator, the electrical boundary current of the converter, and the electrical boundary current of the cable can be determined as the Electrical boundary currents.

That is to say, the current bearing boundary is an important factor affecting the power electrical boundary of wind turbines. For example, the current bearing capacity of the generator is mainly affected by the altitude and ambient temperature under the condition of certain type selection. The lower the current is; the current bearing capacity of the converter is mainly affected by the ambient temperature under the condition of determining the type selection. The higher the temperature, the smaller the current it can withstand, and the lower the power that can be set; The withstand capacity is also mainly affected by the ambient temperature under the condition of the selected model. The higher the ambient temperature, the smaller the current it can withstand, and the lower the power that can be set.

In one or more exemplary embodiments of the present disclosure, when determining the electrical boundary power of the wind turbine based on the ambient temperature, rotational speed, and electrical boundary current of the wind turbine, the rated power, rated current, and power loss of the wind turbine may first be obtained , and then calculate the electrical boundary power of the wind turbine based on the rated power, rated current, power loss, generator winding temperature, electrical boundary current, speed and ambient temperature of the wind turbine.

For example, the electrical boundary power of the wind turbine can be calculated according to the following formula.

Here, Pwr_ _Elec represents the electrical boundary power, P _rate represents the rated power of the wind turbine, I _elec represents the electrical boundary current, T _test represents the temperature of the generator winding tested in the laboratory, t represents the ambient temperature, and I _rate represents the rated current of the wind turbine , Pwr_Loss represents the power loss of the wind turbine, ω represents the current speed of the wind turbine, and ωrate represents the rated speed of the wind turbine. That is to say, the electrical boundary power at different temperatures t is proportional to the value of the power calculated according to the electrical current boundary minus the loss power of the unit.

In one or more exemplary embodiments of the present disclosure, when the predetermined component is a generator, the electrical boundary current of the generator includes a first current limit value and a second current limit value of the generator. Here, the first current limit refers to the generator current limit based on stability, the second current limit refers to the generator current limit based on temperature rise, and the temperature rise refers to the temperature and temperature of the generator winding in the running state. The temperature difference of the cooling medium. That is to say, when calculating the generator current boundary, the current boundary that needs to be considered mainly includes the temperature rise limit value for the generator current, and the stability limit value for the generator current.

In one or more exemplary embodiments of the present disclosure, when determining the electrical boundary current of a predetermined component of the wind turbine based on the ambient temperature, the stability-based generator current limit of the wind turbine may be first determined based on the ambient temperature, and then The temperature rise-based generator current limit of the wind turbine is determined based on the ambient temperature.

In one or more exemplary embodiments of the present disclosure, when determining the stability-based generator current limit of the wind turbine based on the ambient temperature, the unstable power of the generator of the wind turbine at the ambient temperature may be obtained first, The current of the generator under the unstable power is determined based on the unstable power, and then the current value of the generator under the unstable power is determined as the generator current limit value based on the stability. Here, the unstable power refers to the upper limit of the load of the generator.

The load of the generator has a certain upper limit. When this value is exceeded, the generator will have the risk of instability. This upper limit is called the unstable power. The unstable power of the motor is also different under different ambient temperatures, and the unstable power has a positive correlation with the temperature.

For example, the generator current under unstable power can be calculated according to the formula I _instability =((1-T _test *0.0011)*I _rate )/(P _rate *(P _test /(1-T _instability *0.0011)). Here, I _instability represents the current of the generator under unstable power, T _test represents the temperature of the generator winding, I _rate represents the rated current of the wind turbine, P _rate represents the rated power of the wind turbine, P _test represents the unstable power, and T _instability Indicates the instability temperature.

In one or more exemplary embodiments of the present disclosure, when determining the temperature-rise-based generator current limit of the wind turbine based on the ambient temperature, the current limit of the generator temperature-rise can be firstly determined according to the ambient temperature in different geographical locations. value, and then calculate the generator current limit based on temperature rise based on the ambient temperature, the rated current of the wind turbine, and the correction factor.

The temperature rise is the difference between the winding temperature and the cooling medium temperature when the generator is running under certain conditions. This difference has an upper limit according to the design level. The corresponding temperature rise value under different currents is the temperature rise curve. Therefore, in order to make the temperature rise meet the requirements, the current needs to be within a certain range. Since the temperature rise is also affected by the altitude and ambient temperature, the temperature rise measured at different altitudes and ambient temperatures is different. Certain corrections, so when calculating the current range that meets the temperature rise requirements, certain corrections need to be made according to different altitudes and temperatures. After the electrical professional team test, the corresponding relationship between the correction coefficient and the altitude and temperature is shown in Table 1. shown.

Table 1 Correction coefficient of generator temperature rise current limit

As shown in Table 1, the altitude is divided into 4 gears, and the altitude of the gear closest to the actual altitude (called the equivalent altitude ASL) is used to find the correction coefficient. Therefore, when calculating the correction value K, first determine the equivalent altitude ASL and its column position L (L=1/2/3/4), and then calculate the correction value K according to the linear interpolation of the temperature.

For example, according to the formula

Calculates the correction factor for the generator temperature rise current limit. Here, K represents the correction coefficient of the generator temperature rise current limit, K _1L represents the correction coefficient of the generator temperature rise current limit at T ₁ temperature, and K _2L represents the generator temperature rise current limit at T ₂ temperature The correction coefficient, t represents the ambient temperature, _T1 represents the temperature corresponding to the correction coefficient K _1L of the generator temperature rise current limit, and _T2 represents the temperature corresponding to the correction coefficient K _2L of the generator temperature rise current limit. Then, according to the formula

Calculates the generator current limit based on temperature rise. Here, I _TempUp represents the generator current limit based on temperature rise, T _test represents the generator winding temperature, t represents the ambient temperature, I _rate represents the rated current of the wind turbine, and K represents the correction factor.

In one or more exemplary embodiments of the present disclosure, when the predetermined component is a converter, when determining the electrical boundary current of the predetermined component of the wind turbine based on the ambient temperature, it may first be based on the ambient temperature and the current limit of the converter The corresponding relationship of values determines the current limit of the converter corresponding to the ambient temperature, and then determines the current limit of the converter corresponding to the ambient temperature as the electrical boundary current of the converter.

For example, when the ambient temperature is in the first range (for example, t≤T3), the current boundary of the converter of the wind turbine is determined to be the first current limit value I ₃ of the converter. When the ambient temperature is in the second range (for example, T3<t≤T4), according to the formula

Calculate the current bounds of the converter of the wind turbine. Here, I _cnv represents the current limit of the converter of the wind turbine, I ₃ represents the first current limit of the converter, I ₄ represents the second current limit of the converter, t represents the ambient temperature, T ₃ represents the first The upper limit temperature of the first range, _T4 represents the upper limit temperature of the second range.

In one or more exemplary embodiments of the present disclosure, when the predetermined component is a cable, when determining the electrical boundary current of the predetermined component of the wind turbine based on the ambient temperature, the range of the ambient temperature may be determined first, and then based on the environmental The range in which the temperature lies determines the current limit of the cables of the wind turbine.

For example, when the ambient temperature is in the third range (for example, t≤T5), it is determined that the current boundary of the cable of the wind turbine is the third current limit I ₅ . When the ambient temperature is in the fourth range (for example, T5<t≤T6), according to the formula

Calculation of current bounds for cables of wind turbines. Here, I _cab represents the current boundary of the cable of the wind turbine, I ₅ represents the third current limit, I ₆ represents the fourth current limit, t represents the ambient temperature, T ₅ represents the upper limit temperature of the third range, T ₆ represents the third limit Four ranges of upper temperature. When the ambient temperature is in the fifth range (for example, t>T6), according to the formula

Calculate the current boundary of the cable of the wind turbine, where I _cab represents the current boundary of the cable of the wind turbine, I ₆ represents the fourth current limit, I ₇ represents the fifth current limit, t represents the ambient temperature, and T ₆ represents the fourth The upper limit temperature of the range, T ₇ represents the upper limit temperature of the fifth range.

In step S103, the stall boundary power of the wind turbine is determined based on the ambient temperature, rotational speed and pitch angle.

In one or more exemplary embodiments of the present disclosure, when determining the stall boundary power of a wind turbine based on ambient temperature, rotational speed, and pitch angle, it may first be determined based on the corresponding relationship between rotational speed, pitch angle, and stall wind speed and the rotational speed The stall wind speed corresponding to the pitch angle, and obtain the wind energy utilization coefficient when the wind turbine is running, the air density at ambient temperature, and the impeller radius of the wind turbine, and then calculate the wind power based on the stall wind speed, wind energy utilization coefficient, air density, and impeller radius The stall boundary power of the unit. Here, the air density at ambient temperature is calculated based on the ambient temperature.

When determining the stall wind speed corresponding to the speed and pitch angle based on the corresponding relationship between the speed, pitch angle, and stall wind speed, since the stall wind speed has a linear relationship with the speed and pitch angle, in order to avoid too many parameters, you can first Carry out curve fitting, and then calculate the stall wind speed in real time according to the fitting relationship between the stall wind speed and the rotational speed and pitch angle.

The wind energy utilization coefficient Cp when the unit is running can be obtained by looking up the table according to the real-time pitch angle and tip speed ratio. The horizontal axis of the table is the pitch angle (PitAng), the vertical axis is the tip speed ratio (Lamda), and the corresponding is Cp/(Lamda) ³ .

Since the air density is affected by altitude and temperature, it is necessary to calculate the air density based on the actual altitude of the site and the real-time temperature.

For example, according to the formula

to calculate the air density. Here, ρ represents the air density, ASL represents the equivalent altitude, H represents the unit tower height, and t represents the ambient temperature. After calculating the stall wind speed and air density, the stall boundary power of the wind turbine can be calculated according to the formula Pwr _Stall =0.5*ρ*PI*Cp*R ² *WindSpd_Stall ³ . Here, Pwr _Stall represents the stall boundary power of the wind turbine, ρ represents the air density, PI represents the circumference ratio, Cp represents the wind energy utilization coefficient, R represents the impeller radius, and WindSpd_Stall represents the stall wind speed.

In step S104, the set power of the wind turbine is determined based on the electrical boundary power and the stall boundary power of the wind turbine.

In an exemplary embodiment of the present disclosure, when determining the set power of the wind turbine based on the electrical boundary power and the stall boundary power of the wind turbine, the electrical boundary power of the wind turbine and the stall boundary power can be compared first, and then the electrical The minimum value of the boundary power and the stall boundary power is used as the set power of the wind turbine.

In step S105, the output of the wind turbine is controlled according to the set power.

In one or more exemplary embodiments of the present disclosure, when the output of the wind turbine is controlled according to the set power, if the set power is greater than the rated power, the wind turbine is controlled to output in an over-power state; if the set power is less than the rated power, the wind turbine is controlled to output in a power-limited state.

In one or more exemplary embodiments of the present disclosure, as shown in FIG. 1B , after determining the set power of the wind turbine based on the electrical boundary power and stall boundary power of the wind turbine, the set power can also be used as The upper limit of active power is input to the management system (energy management platform). Here, the management system is used for power scheduling according to grid demand and active power cap. For example, the management system can set the power setting for over-delivery to no more than 1.05 times the original rated power.

In addition, according to one or more exemplary embodiments of the present disclosure, there is also provided a computer-readable storage medium on which computer program instructions are stored. When the computer program instructions are executed, the exemplary The power control method of the wind turbine of the embodiment.

In one or more exemplary embodiments of the present disclosure, the computer-readable storage medium may carry one or more programs, and when the computer program instructions in the programs are executed, the following steps may be implemented: obtaining wind turbine Ambient temperature, rotational speed and pitch angle during operation; determine the electrical boundary power of the wind turbine based on the ambient temperature; determine the stall boundary power of the wind turbine based on the ambient temperature, rotational speed and pitch angle; determine the electrical boundary power and stall boundary of the wind turbine based on the ambient temperature, rotational speed and pitch angle The power determines the set power of the wind turbine; the output of the wind turbine is controlled according to the set power.

A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to, electrical connections with one or more wires, portable computer diskettes, hard disks, random access memory (RAM), read-only memory (ROM), erasable Programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above.

In one or more embodiments of the present disclosure, a computer-readable storage medium may be any tangible medium that contains or stores a computer program that can be used by or in conjunction with an instruction execution system, apparatus, or device. A computer program embodied on a computer readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above. A computer-readable storage medium may be included in any device; and may exist independently without being incorporated into the device.

In addition, according to one or more exemplary embodiments of the present disclosure, there is also provided a computer program product, the instructions in the computer program product can be executed by a processor of a computer device to complete the wind turbine generator set according to the exemplary embodiments of the present disclosure method of power control.

The power control method of the wind turbine according to the exemplary embodiment of the present disclosure has been described above with reference to FIG. 1A and FIG. 1B . Hereinafter, a power control device for a wind turbine and units thereof according to an exemplary embodiment of the present disclosure will be described with reference to FIGS. 2 to 4 .

Referring to FIG. 2 , the power control device of a wind turbine includes a data acquisition unit 21 , a first power determination unit 22 , a second power determination unit 23 , a set power determination unit 24 and an output control unit 25 .

The data acquisition unit 21 is configured to acquire the ambient temperature, rotational speed and pitch angle of the wind turbine during operation.

The first power determination unit 22 is configured to determine the electrical boundary power of the wind turbine based on the ambient temperature and the rotational speed.

In one or more exemplary embodiments of the present disclosure, the first power determination unit 22 may be configured to: determine the electrical boundary current of predetermined components of the wind turbine based on the ambient temperature, where the predetermined components may include generators, converters at least one of the transformer and the cable; determine the minimum value of the electrical boundary current of the predetermined component as the electrical boundary current of the wind turbine; determine the electrical boundary power of the wind turbine based on the ambient temperature, the rotational speed and the electrical boundary current of the wind turbine. When the generator, converter, and cable are all determined as predetermined components, the minimum value of the electrical boundary current of the generator, the electrical boundary current of the converter and the electrical boundary current of the cable can be determined as the electrical boundary of the wind turbine current.

In one or more exemplary embodiments of the present disclosure, the first power determination unit 22 may be configured to: obtain the rated power, rated current and power loss of the wind turbine; , generator winding temperature and electrical boundary current, speed and ambient temperature to calculate the electrical boundary power of the wind turbine.

In one or more exemplary embodiments of the present disclosure, when the predetermined component is a generator, the electrical boundary current of the generator may include a first current limit value and a second current limit value of the generator, wherein the first current The limit value refers to the generator current limit value based on stability, the second current limit value refers to the generator current limit value based on temperature rise, and the temperature rise refers to the difference between the temperature of the generator winding and the temperature of the cooling medium in the running state Difference.

In one or more exemplary embodiments of the present disclosure, the first power determination unit 22 may include at least one of a first determination unit 221 , a second determination unit 222 and a third determination unit 223 . FIG. 3 shows an example in which the first power determination unit 22 includes a first determination unit 221 , a second determination unit 222 and a third determination unit 223 .

In one or more exemplary embodiments of the present disclosure, the first determination unit 221 may be configured to determine the stability-based generator current limit of the wind turbine based on the ambient temperature; generator current limit.

In one or more exemplary embodiments of the present disclosure, the first determination unit 221 may be configured to: obtain the unsteady power of the generator of the wind turbine at the ambient temperature, where the unsteady power refers to the upper limit of the load of the generator; The current of the generator under the unstable power is determined based on the unstable power; the current value of the generator under the unstable power is determined as the current limit value of the generator based on the stability.

In one or more exemplary embodiments of the present disclosure, the first determination unit 221 may be configured to: determine the correction coefficient of the current limit value of the temperature rise of the generator according to the ambient temperature in different geographic locations; The rated current, and the correction factor are calculated based on the temperature rise of the generator current limit.

In one or more exemplary embodiments of the present disclosure, the second determination unit 222 may be configured to: when the predetermined component is a converter, determine the ambient temperature according to the correspondence between the ambient temperature and the current limit value of the converter The corresponding current limit of the converter; the current limit of the converter corresponding to the ambient temperature is determined as the electrical boundary current of the converter.

In one or more exemplary embodiments of the present disclosure, the third determination unit 223 may be configured to: determine the range of the ambient temperature when the predetermined component is a cable; determine the range of the wind power based on the range of the ambient temperature. The current boundary of the cable of the unit.

The second power determination unit 23 is configured to determine the stall boundary power of the wind turbine based on the ambient temperature, rotational speed and pitch angle.

In one or more exemplary embodiments of the present disclosure, the second power determination unit 23 may be configured to: determine the stall wind speed corresponding to the speed and the pitch angle based on the correspondence between the speed, the pitch angle, and the stall wind speed; obtain The wind energy utilization coefficient, the air density at ambient temperature, and the impeller radius of the wind turbine when the wind turbine is running, where the air density at ambient temperature is calculated based on the ambient temperature; based on the stall wind speed, wind energy utilization coefficient, air density, and impeller radius The radius calculates the stall boundary power of the wind turbine.

The set power determining unit 24 is configured to determine the set power of the wind turbine based on the electrical boundary power and the stall boundary power of the wind turbine.

In one or more exemplary embodiments of the present disclosure, the set power determining unit 24 may be configured to: compare the electrical boundary power of the wind turbine with the stall boundary power; The value is used as the set power of the wind turbine.

The output control unit 25 is configured to control the output of the wind turbine according to the set power.

In one or more exemplary embodiments of the present disclosure, the output control unit 25 may be configured to: if the set power is greater than the rated power, control the wind turbine to output in a super-power state; if the set power is less than the rated power, then Control wind turbines to output in power-limited state.

In one or more exemplary embodiments of the present disclosure, as shown in FIG. In addition to 25, the power control device may further include: the data management unit 26 is configured to input the set power as the upper limit of the active power of the wind turbine after determining the set power of the wind turbine based on the electrical boundary power and the stall boundary power of the wind turbine To the management system, the management system is used for power scheduling according to the grid demand and the upper limit of active power.

The power control device of the wind turbine according to the exemplary embodiment of the present disclosure has been described above with reference to FIGS. 2 to 4 . Next, a computing device according to an exemplary embodiment of the present disclosure will be described with reference to FIG. 5 .

Referring to FIG. 5 , a computing device 5 according to one or more exemplary embodiments of the present disclosure includes a memory 51 and a processor 52 , the memory 51 stores computer program instructions, and when the computer program instructions are executed by the processor 52 When executed, the power control method of the wind turbine according to the exemplary embodiment of the present disclosure is realized.

In one or more exemplary embodiments of the present disclosure, when the computer program instructions are executed by the processor 52, the following steps may be implemented: obtaining the ambient temperature, rotational speed and pitch angle of the wind turbine during operation; and speed to determine the electrical boundary power of the wind turbine; determine the stall boundary power of the wind turbine based on the ambient temperature, speed and pitch angle; determine the set power of the wind turbine based on the electrical boundary power and stall boundary power of the wind turbine; according to the set power Control the output of the wind turbine.

The computing device shown in FIG. 5 is only an example, and should not limit the functions and scope of use of the embodiments of the present disclosure.

The power control method and device of a wind turbine according to an exemplary embodiment of the present disclosure have been described above with reference to FIGS. 1 to 5 . However, it should be understood that: the power control device of the wind turbine shown in Fig. 2 to Fig. 4 and its units can be respectively configured as software, hardware, firmware or any combination of the above-mentioned items to perform specific functions. The illustrated computing device is not limited to include the components illustrated above, but some components may be added or deleted as needed, and the above components may also be combined.

According to the power control method and device of a wind turbine set in an exemplary embodiment of the present disclosure, by obtaining the ambient temperature, rotation speed and pitch angle of the wind turbine set during operation, the electrical boundary power of the wind turbine set is determined based on the ambient temperature and the rotation speed, and based on the ambient temperature , speed and pitch angle to determine the stall boundary power of the wind turbine, determine the set power of the wind turbine based on the electrical boundary power and stall boundary power of the wind turbine, and control the output of the wind turbine according to the set power, realizing the actual ambient temperature Adjust the power setting of the unit, increase the power generation when the temperature is low, and ensure the safety of the unit when the temperature is high, thereby enhancing the competitiveness of the unit.

While the present disclosure has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that changes may be made in form and detail without departing from the spirit and scope of the present disclosure as defined by the claims. various changes.

Claims

A power control method for a wind turbine, the power control method comprising:

Obtain the ambient temperature, speed and pitch angle of the wind turbine during operation;

determining the electrical boundary power of the wind turbine based on the ambient temperature and the rotational speed;

determining the stall boundary power of the wind turbine based on the ambient temperature, rotational speed and pitch angle;

Determine the set power of the wind turbine based on the electrical boundary power and stall boundary power of the wind turbine;

The output of the wind turbine is controlled according to the set power.
The power control method according to claim 1, wherein said determining the electrical boundary power of the wind turbine based on the ambient temperature and the rotational speed comprises:

determining electrical boundary currents of predetermined components of the wind turbine based on the ambient temperature, wherein the predetermined components include generators, converters, and cables;

Determine the minimum value among the electrical boundary current of the generator, the electrical boundary current of the converter and the electrical boundary current of the cable as the electrical boundary current of the wind turbine;

The electrical boundary power of the wind turbine is determined based on the ambient temperature, the rotational speed and the electrical boundary current of the wind turbine.
The power control method according to claim 2, wherein said determining the electrical boundary power of the wind turbine based on the ambient temperature, the rotational speed and the electrical boundary current of the wind turbine comprises:

Obtain the rated power, rated current and power loss of the wind turbine;

The electrical boundary power of the wind turbine is calculated based on the rated power, rated current, power loss, generator winding temperature, electrical boundary current, rotation speed, and ambient temperature of the wind turbine.
The power control method according to claim 2, wherein when the predetermined component is a generator, the electrical boundary current of the generator includes a first current limit value and a second current limit value of the generator,

Wherein, the first current limit refers to the generator current limit based on stability, the second current limit refers to the generator current limit based on temperature rise, and the temperature rise refers to the The difference between the temperature of the generator winding and the temperature of the cooling medium,

Wherein, the determination of the electrical boundary current of predetermined components of the wind turbine based on the ambient temperature includes:

determining a stability-based generator current limit for the wind turbine based on the ambient temperature;

A temperature rise-based generator current limit value of the wind turbine is determined based on the ambient temperature.
The power control method according to claim 4, wherein said determining the stability-based generator current limit of the wind turbine based on the ambient temperature comprises:

Obtain the unstable power of the generator of the wind turbine at the ambient temperature, and the unstable power refers to the upper limit of the load of the generator;

determining a current of the generator at the jerk power based on the jerk power;

A current value of the generator at the unstable power is determined as a stability-based generator current limit.
The power control method according to claim 4, wherein said determining the temperature-rise-based generator current limit of the wind turbine based on the ambient temperature comprises:

Determine the correction factor for the current limit of the generator temperature rise according to the ambient temperature in different geographical locations;

The generator current limit value based on temperature rise is calculated based on the ambient temperature, the rated current of the wind turbine, and the correction coefficient.
The power control method according to claim 2, wherein when the predetermined component is a converter, determining the electrical boundary current of the predetermined component of the wind turbine based on the ambient temperature comprises:

Determine the current limit value of the converter corresponding to the ambient temperature according to the corresponding relationship between the ambient temperature and the current limit value of the converter;

The converter current limit corresponding to the ambient temperature is determined as the electrical boundary current of the converter.
The power control method according to claim 2, wherein when the predetermined component is a cable, determining the electrical boundary current of the predetermined component of the wind turbine based on the ambient temperature comprises:

determining the range of the ambient temperature;

The current boundary of the cable of the wind turbine is determined based on the range of the ambient temperature.
The power control method according to claim 1, wherein said determining the stall boundary power of the wind turbine based on the ambient temperature, rotational speed and pitch angle comprises:

Determine the stall wind speed corresponding to the speed and pitch angle based on the corresponding relationship between the speed, pitch angle and stall wind speed;

Obtain the wind energy utilization coefficient when the wind turbine is running, the air density at the ambient temperature, and the impeller radius of the wind turbine, wherein the air density at the ambient temperature is calculated based on the ambient temperature;

Calculate the stall boundary power of the wind turbine based on the stall wind speed, the wind energy utilization coefficient, the air density and the impeller radius.
The power control method according to any one of claims 1 to 9, wherein said determining the set power of the wind turbine based on the electrical boundary power and the stall boundary power of the wind turbine comprises:

Compare the electrical boundary power of the wind turbine with the stall boundary power;

The minimum value of the electrical boundary power and the stall boundary power is taken as the set power of the wind turbine.
The power control method according to any one of claims 1 to 9, wherein controlling the output of the wind turbine according to the set power includes:

If the set power is greater than the rated power, then control the wind turbine to output in an over-power state;

If the set power is less than the rated power, the wind turbine is controlled to output in a power-limited state.
The power control method according to any one of claims 1 to 9, wherein, after determining the set power of the wind turbine based on the electrical boundary power and stall boundary power of the wind turbine, further comprising:

The set power is input into the management system as the upper limit of the active power of the wind turbine, and the management system is used to perform power scheduling according to the demand of the grid and the upper limit of the active power.
A power control device for a wind turbine, the power control device comprising:

The data acquisition unit is configured to acquire the ambient temperature, rotational speed and pitch angle of the wind turbine during operation;

The first power determination unit is configured to determine the electrical boundary power of the wind turbine based on the ambient temperature and the rotational speed;

The second power determination unit is configured to determine the stall boundary power of the wind turbine based on the ambient temperature, rotational speed and pitch angle;

a set power determining unit configured to determine the set power of the wind turbine based on the electrical boundary power and the stall boundary power of the wind turbine; and

An output control unit configured to control the output of the wind turbine according to the set power.
The power control device according to claim 13, wherein the first power determining unit is configured to:

determining electrical boundary currents of predetermined components of the wind turbine based on the ambient temperature, wherein the predetermined components include generators, converters, and cables;

Determine the minimum value among the electrical boundary current of the generator, the electrical boundary current of the converter and the electrical boundary current of the cable as the electrical boundary current of the wind turbine;

The electrical boundary power of the wind turbine is determined based on the ambient temperature, the rotational speed and the electrical boundary current of the wind turbine.
The power control device according to claim 14, wherein the first power determination unit is configured to:

Obtain the rated power, rated current and power loss of the wind turbine;

The electrical boundary power of the wind turbine is calculated based on the rated power, rated current, power loss, generator winding temperature, electrical boundary current, rotation speed, and ambient temperature of the wind turbine.
The power control device according to claim 14, wherein when the predetermined component is a generator, the electrical boundary current of the generator includes a first current limit value and a second current limit value of the generator;

Wherein, the first current limit refers to the generator current limit based on stability, the second current limit refers to the generator current limit based on temperature rise, and the temperature rise refers to the The difference between the temperature of the generator winding and the temperature of the cooling medium,

Wherein, the first power determination unit includes a first determination unit configured to:

determining a stability-based generator current limit for the wind turbine based on the ambient temperature;

A temperature rise-based generator current limit value of the wind turbine is determined based on the ambient temperature.
The power control device according to claim 16, wherein the first determination unit is configured to:

Obtain the unstable power of the generator of the wind turbine at the ambient temperature, and the unstable power refers to the upper limit of the load of the generator;

determining a current of the generator at the jerk power based on the jerk power;

A current value of the generator at the unstable power is determined as a stability-based generator current limit.
The power control device according to claim 16, wherein the first determination unit is configured to:

Determine the correction factor for the current limit of the generator temperature rise according to the ambient temperature in different geographical locations;

The generator current limit value based on temperature rise is calculated based on the ambient temperature, the rated current of the wind turbine, and the correction coefficient.
The power control device according to claim 14, wherein the first power determination unit comprises a second determination unit configured to:

When the predetermined component is a converter, determine the current limit value of the converter corresponding to the ambient temperature according to the corresponding relationship between the ambient temperature and the current limit value of the converter;

The converter current limit corresponding to the ambient temperature is determined as the electrical boundary current of the converter.
The power control device according to claim 14, wherein the first power determining unit comprises a third determining unit configured to:

When the predetermined component is a cable, determine the range of the ambient temperature;

The current boundary of the cable of the wind turbine is determined based on the range of the ambient temperature.
The power control device according to claim 13, wherein the second power determination unit is configured to:

Determine the stall wind speed corresponding to the speed and pitch angle based on the corresponding relationship between the speed, pitch angle and stall wind speed;

Obtain the wind energy utilization coefficient when the wind turbine is running, the air density at the ambient temperature, and the impeller radius of the wind turbine, wherein the air density at the ambient temperature is calculated based on the ambient temperature;

The stall boundary power of the wind turbine is calculated based on the stall wind speed, the wind energy utilization coefficient, the air density and the impeller radius.
The power control device according to any one of claims 13 to 21, wherein the set power determining unit is configured to:

Compare the electrical boundary power of the wind turbine with the stall boundary power;

The minimum value of the electrical boundary power and the stall boundary power is taken as the set power of the wind turbine.
The power control device according to any one of claims 13 to 21, wherein the output control unit is configured to:

If the set power is greater than the rated power, then control the wind turbine to output in an over-power state;

If the set power is less than the rated power, the wind turbine is controlled to output in a power-limited state.
The power control device according to any one of claims 13 to 21, wherein the power control device further comprises:

The data management unit is configured to, after determining the set power of the wind turbine based on the electrical boundary power and the stall boundary power of the wind turbine, input the set power as the upper limit of the active power of the wind turbine to the management system, and the management system uses The power scheduling is performed according to the grid demand and the active power upper limit.
A computer-readable storage medium storing computer program instructions. When the computer program instructions are executed by a processor, the power control method for a wind turbine according to any one of claims 1 to 12 is realized.
A computing device comprising:

processor;

The memory stores computer program instructions, and when the computer program instructions are executed by the processor, the power control method for wind turbines according to any one of claims 1 to 12 is realized.
A computer program product having a program code, which is stored on a computer-readable storage medium, and when the program code is executed on a computer, the power control method for a wind turbine according to any one of claims 1 to 12 is realized .