Yaw multi-transmission control system, method, device and terminal for wind generating set

Abstract

The invention provides a yaw multi-transmission control system, method and device for a wind generating set, a terminal and a medium. The system comprises a fan controller, a fan rectification unit and k inversion units, the fan rectification unit and the k inversion units are connected with the fan controller through communication lines; the fan rectification unit is connected in parallel with the k inversion units through a bus; and the k inversion units are respectively connected with a yaw motor. According to the method, the rotating speed and torque data of a single yaw motor are obtained in the mode that one inverter controls one yaw motor, and the output condition of the whole yaw motor is controlled in the mode that the target rotating speed of the motor with too large output is reduced and the target rotating speed of the motor with too small output is increased in the whole yaw process. And the suppression of the unbalanced output of the yaw motor is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a yaw multi-transmission control system, method, device, terminal and medium for a wind generator set. Background Art

[0002] As a clean and renewable energy form, wind power generation has received widespread attention and application around the world in recent years. As the core equipment of wind power generation, the stability and reliability of the performance of wind turbines are directly related to the power generation efficiency and economic benefits of the entire wind power system. The yaw system is an important component of the wind turbine. It is responsible for driving the nacelle of the wind turbine to perform yaw movement to ensure that the blades of the wind turbine are always aligned with the wind direction, thereby maximizing the capture of wind energy.

[0003] At present, the yaw system of wind turbines generally adopts a design scheme in which multiple yaw motors of the same model jointly drive the yaw bearing. The advantage of this design scheme is that the driving ability and reliability of the yaw system can be improved by running multiple motors in parallel. However, in practical applications, this control mode also exposes some obvious problems.

[0004] Specifically, the current yaw motor control mode mainly relies on a yaw inverter or a soft starter to drive multiple yaw motors in parallel to run synchronously. Although this control method achieves the synchronous operation of the yaw motors to a certain extent, it cannot accurately control the current and torque output of each yaw motor. Due to the parameter differences between the motors, uneven load distribution, and environmental factors, the yaw motor output is often uneven in actual operation.

[0005] Uneven yaw motor output will not only reduce the stability of yaw motion and affect the power generation efficiency of wind turbines, but may also cause serious faults such as broken teeth of yaw reduction gearboxes in extreme cases. This will not only increase the maintenance cost of wind turbines, but also pose a threat to the safe operation of wind power systems. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention proposes a wind turbine yaw multi-transmission control system, method, device, terminal and medium to solve the technical problems in the prior art.

[0007] The technical solution adopted by the present invention is:

[0008] A first aspect of the present embodiment provides a yaw multi-transmission control system for a wind turbine generator set, the system comprising:

[0009] A fan controller, a fan rectifier unit and k inverter units;

[0010] The fan rectifier unit and the k inverter units are connected to the fan controller via a communication line;

[0011] The fan rectifier unit is connected in parallel to the k inverter units via a busbar;

[0012] The k inverter units are respectively connected to yaw motors.

[0013] A second aspect of the present embodiment provides a yaw multi-transmission control method for a wind turbine generator set, which is applied to a yaw multi-transmission control system for a wind turbine generator set. The yaw multi-transmission control system for a wind turbine generator set includes a wind turbine controller, a wind turbine rectifier unit, and k inverter units. The method includes:

[0014] The wind turbine controller obtains the target speed information and current torque information of k yaw motors, and the k yaw motors correspond one-to-one to the k inverter units;

[0015] The fan controller compares the current torque information of each yaw motor with the preset torque, and if there is a first yaw motor among the k yaw motors, determines whether the target speed information of the first yaw motor is less than or equal to 97% of the rated speed, and the current torque information of the first yaw motor is greater than the preset torque.

[0016] If the target speed information of the first yaw motor is less than or equal to 97% of the rated speed, and the target speed information of the other current yaw motors is greater than or equal to 102% of the rated speed, the other current yaw motors are not controlled;

[0017] If the target speed information of the first yaw motor is less than or equal to 97% of the rated speed, and the current target speed information of the other yaw motors is less than 102% of the rated speed, then the current target speed information of the other yaw motors is increased by 0.2% of the rated speed;

[0018] If the target speed information of the first yaw motor is greater than 97% of the rated speed, reducing the target speed information of the first yaw motor by 0.3% of the rated speed;

[0019] If the first yaw motor does not exist among the k yaw motors, it is determined whether the target speed information of the k yaw motors is equal to the rated speed; if there is a yaw motor whose target speed information of the second yaw motor is not equal to the rated speed, the target speed information of the second yaw motor is adjusted to be equal to the rated speed in steps of 1% of the rated speed.

[0020] Furthermore, before the fan controller obtains the target speed information and current torque information of the k yaw motors, the method further includes:

[0021] The inverter unit receives and analyzes the target speed information and current torque information of the yaw motor associated therewith;

[0022] The fan controller obtains target speed information and current torque information of k yaw motors from the inverter unit.

[0023] Furthermore, the preset torque is set as a threshold value of 10% higher than the average value of current torque information of all yaw motors.

[0024] Furthermore, the average value of the current torque information of all yaw motors is greater than the rated torque.

[0025] A third aspect of the present embodiment provides a yaw multi-transmission control device for a wind turbine generator set, the device comprising:

[0026] An information acquisition unit is used for the wind turbine controller to obtain target speed information and current torque information of k yaw motors, where the k yaw motors correspond one-to-one to the k inverter units;

[0027] A torque comparison unit, used for the wind turbine controller to compare the current torque information of each yaw motor with the preset torque to obtain a comparison result;

[0028] an overload motor speed adjustment unit, for determining whether the target speed information of the first yaw motor is less than or equal to 97% of the rated speed if there is a first yaw motor among the k yaw motors, and the first yaw motor is a yaw motor whose current torque information is greater than the preset torque;

[0029] If the target speed information of the first yaw motor is less than or equal to 97% of the rated speed, and the target speed information of the other current yaw motors is greater than or equal to 102% of the rated speed, the other current yaw motors are not controlled;

[0030] If the target speed information of the first yaw motor is less than or equal to 97% of the rated speed, and the current target speed information of the other yaw motors is less than 102% of the rated speed, then the current target speed information of the other yaw motors is increased by 0.2% of the rated speed;

[0031] If the target speed information of the first yaw motor is greater than 97% of the rated speed, reducing the target speed information of the first yaw motor by 0.3% of the rated speed;

[0032] The non-overload motor speed adjustment unit is used to determine whether the target speed information of the k yaw motors is equal to the rated speed if the first yaw motor does not exist among the k yaw motors; if there is a yaw motor whose target speed information of the second yaw motor is not equal to the rated speed, adjust the target speed information of the second yaw motor to be equal to the rated speed in steps of 1% of the rated speed.

[0033] A fourth aspect of this embodiment provides a terminal, comprising a processor, an input device, an output device and a memory, wherein the processor, the input device, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program comprises program instructions, and the processor is configured to call the program instructions to execute any method described in the second aspect of this embodiment.

[0034] A fifth aspect of this embodiment provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, wherein the computer program includes program instructions, and when the program instructions are executed by a processor, the processor executes any method described in the second aspect of this embodiment.

[0035] It can be seen from the above technical solution that the beneficial technical effects of the present invention are as follows:

[0036] 1. In order to suppress the problem of unbalanced yaw motor output and avoid the resulting yaw failure and broken teeth damage of the yaw reduction gearbox, the present invention adopts a yaw multi-transmission control method for wind turbine generator sets: first, a single yaw motor is controlled by an inverter to obtain its speed and torque data. Then, during the entire yaw process, the target speed of each motor is dynamically adjusted - specifically, the target speed of the motor with too large an output is lowered, and the target speed of the motor with too small an output is raised. The present invention ensures balanced output of each motor by optimizing the output of the entire yaw motor system. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0038] Figure 1 This is a system framework diagram of an embodiment of the present invention;

[0039] Figure 2 This is a flow chart of a method according to an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of the device framework of the embodiment of the invention;

[0041] Figure 4 It is a schematic diagram of the terminal of the present invention. DETAILED DESCRIPTION

[0042] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0043] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0044] Example

[0045] This embodiment provides a wind turbine yaw multi-transmission control system, including: a wind turbine controller, a wind turbine rectifier unit and k inverter units;

[0046] The fan rectifier unit and the k inverter units are connected to the fan controller via a communication line;

[0047] The fan rectifier unit is connected in parallel to the k inverter units via a busbar;

[0048] The k inverter units are respectively connected to yaw motors.

[0049] The wind turbine generator set yaw multi-transmission control system of this embodiment is as follows: Figure 1 As shown, it includes: a fan controller, a fan rectifier unit and four inverter units (inverter unit 10, inverter unit 11, inverter unit 12 and inverter unit 13);

[0050] The fan rectifier unit and the four inverter units are connected to the fan controller via a communication line;

[0051] The fan rectifier unit is connected in parallel to the four inverter units via a busbar;

[0052] The inverter unit 10 is connected to the yaw motor 20 , the inverter unit 11 is connected to the yaw motor 21 , the inverter unit 12 is connected to the yaw motor 22 , and the inverter unit 13 is connected to the yaw motor 23 .

[0053] In the yaw multi-transmission control system of the wind turbine generator set in this embodiment, the wind turbine controller exchanges data with the yaw rectifier unit and the inverter unit through the communication line, and sends control instructions to control the rectifier and inverter units while receiving real-time data fed back by the rectifier and inverter units.

[0054] This embodiment provides a method for controlling the yaw multi-transmission of a wind turbine generator set. Figure 2 As shown, the method includes:

[0055] The wind turbine controller obtains the target speed information and current torque information Tx of k yaw motors, and the k yaw motors correspond one-to-one to the k inverter units;

[0056] The fan controller compares the current torque information Tx of each yaw motor with the preset torque, and if there is a first yaw motor among the k yaw motors, determines whether the target speed information of the first yaw motor is less than or equal to 97% of the rated speed, and the first yaw motor is a yaw motor whose current torque information Tx is greater than the preset torque;

[0057] In this embodiment, the preset torque is set as a threshold value of 10% higher than the current torque information average value Tavg of all yaw motors, and the current torque information average value Tavg of all yaw motors is greater than the rated torque Tn;

[0058] If the target speed information of the first yaw motor is less than or equal to 97% of the rated speed, and the target speed information of the other current yaw motors is greater than or equal to 102% of the rated speed, the other current yaw motors are not controlled;

[0059] If the target speed information of the first yaw motor is less than or equal to 97% of the rated speed, and the current target speed information of the other yaw motors is less than 102% of the rated speed, then the current target speed information of the other yaw motors is increased by 0.2% of the rated speed;

[0060] If the target speed information of the first yaw motor is greater than 97% of the rated speed, reducing the target speed information of the first yaw motor by 0.3% of the rated speed;

[0061] If the first yaw motor does not exist among the k yaw motors, it is determined whether the target speed information of the k yaw motors is equal to the rated speed; if there is a yaw motor whose target speed information of the second yaw motor is not equal to the rated speed, the target speed information of the second yaw motor is adjusted to be equal to the rated speed in steps of 1% of the rated speed.

[0062] Specifically, before the fan controller obtains the target speed information and current torque information of the k yaw motors, the method further includes:

[0063] The inverter unit receives and analyzes the target speed information and current torque information of the yaw motor associated therewith;

[0064] The fan controller obtains target speed information and current torque information of k yaw motors from the inverter unit.

[0065] This embodiment provides a wind turbine yaw multi-transmission control device, such as Figure 3 As shown, the device comprises:

[0066] The information acquisition unit 101 is used for the wind turbine controller to obtain target speed information and current torque information of k yaw motors, and the k yaw motors correspond to the k inverter units one by one.

[0067] The torque comparison unit 102 is used for the wind turbine controller to compare the current torque information of each yaw motor with the preset torque to obtain a comparison result.

[0068] an overload motor speed adjustment unit 103, for determining whether the target speed information of the first yaw motor is less than or equal to 97% of the rated speed if there is a first yaw motor among the k yaw motors, and the first yaw motor is a yaw motor whose current torque information is greater than the preset torque;

[0069] If the target speed information of the first yaw motor is less than or equal to 97% of the rated speed, and the target speed information of the other current yaw motors is greater than or equal to 102% of the rated speed, the other current yaw motors are not controlled;

[0070] If the target speed information of the first yaw motor is less than or equal to 97% of the rated speed, and the current target speed information of the other yaw motors is less than 102% of the rated speed, then the current target speed information of the other yaw motors is increased by 0.2% of the rated speed;

[0071] If the target rotation speed information of the first yaw motor is greater than 97% of the rated rotation speed, the target rotation speed information of the first yaw motor is reduced by 0.3% of the rated rotation speed.

[0072] The no-overload motor speed adjustment unit 104 is used to determine whether the target speed information of the k yaw motors is equal to the rated speed if the first yaw motor does not exist among the k yaw motors; if there is a yaw motor whose target speed information of the second yaw motor is not equal to the rated speed, adjust the target speed information of the second yaw motor to be equal to the rated speed in steps of 1% of the rated speed.

[0073] like Figure 4 As shown, this embodiment provides a terminal, including a processor, an input device, an output device and a memory, wherein the processor, the input device, the output device and the memory are interconnected, wherein the memory is used to store a computer program, and the computer program includes program instructions, and the processor is configured to call the program instructions to execute part or all of the steps described in a wind turbine yaw multi-transmission control method provided in this embodiment.

[0074] This embodiment also provides a computer-readable storage medium, which stores a computer program. The computer program includes program instructions. When the program instructions are executed by a processor, the processor executes part or all of the steps described in a wind turbine yaw multi-transmission control method provided in this embodiment.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A wind turbine yaw multi-transmission control system, characterized in that: The system comprises: A fan controller, a fan rectifier unit and k inverter units; The fan rectifier unit and the k inverter units are connected to the fan controller via a communication line; The fan rectifier unit is connected in parallel to the k inverter units via a busbar; The k inverter units are respectively connected to yaw motors.

2. A yaw multi-transmission control method for a wind turbine generator set, characterized in that: The method is applied to a yaw multi-transmission control system of a wind turbine generator set, the yaw multi-transmission control system of the wind turbine generator set includes a wind turbine controller, a wind turbine rectifier unit and k inverter units, and the method includes: The wind turbine controller obtains the target speed information and current torque information of k yaw motors, and the k yaw motors correspond one-to-one to the k inverter units; The fan controller compares the current torque information of each yaw motor with the preset torque, and if there is a first yaw motor among the k yaw motors, determines whether the target speed information of the first yaw motor is less than or equal to 97% of the rated speed, and the current torque information of the first yaw motor is greater than the preset torque. If the target speed information of the first yaw motor is less than or equal to 97% of the rated speed, and the target speed information of the other current yaw motors is greater than or equal to 102% of the rated speed, the other current yaw motors are not controlled; If the target speed information of the first yaw motor is less than or equal to 97% of the rated speed, and the current target speed information of the other yaw motors is less than 102% of the rated speed, then the current target speed information of the other yaw motors is increased by 0.2% of the rated speed; If the target speed information of the first yaw motor is greater than 97% of the rated speed, reducing the target speed information of the first yaw motor by 0.3% of the rated speed; If the first yaw motor does not exist among the k yaw motors, it is determined whether the target speed information of the k yaw motors is equal to the rated speed; if there is a yaw motor whose target speed information of the second yaw motor is not equal to the rated speed, the target speed information of the second yaw motor is adjusted to be equal to the rated speed in steps of 1% of the rated speed.

3. A yaw multi-transmission control method for a wind turbine generator set according to claim 2, characterized in that: Before the fan controller obtains the target speed information and current torque information of the k yaw motors, the method further includes: The inverter unit receives and analyzes the target speed information and current torque information of the yaw motor associated therewith; The fan controller obtains target speed information and current torque information of k yaw motors from the inverter unit.

4. A yaw multi-transmission control method for a wind turbine generator set according to any one of claims 2-3, characterized in that: The preset torque is set as a threshold value of 10% above the average value of current torque information of all yaw motors.

5. A yaw multi-transmission control method for a wind turbine generator set according to claim 4, characterized in that: The average value of the current torque information of all yaw motors is greater than the rated torque.

6. A yaw multi-transmission control device for a wind turbine generator set, characterized in that: The device comprises: An information acquisition unit is used for the wind turbine controller to obtain target speed information and current torque information of k yaw motors, where the k yaw motors correspond one-to-one to the k inverter units; A torque comparison unit, used for the wind turbine controller to compare the current torque information of each yaw motor with the preset torque to obtain a comparison result; an overload motor speed adjustment unit, for determining whether the target speed information of the first yaw motor is less than or equal to 97% of the rated speed if there is a first yaw motor among the k yaw motors, and the first yaw motor is a yaw motor whose current torque information is greater than the preset torque; If the target speed information of the first yaw motor is less than or equal to 97% of the rated speed, and the target speed information of the other current yaw motors is greater than or equal to 102% of the rated speed, the other current yaw motors are not controlled; If the target speed information of the first yaw motor is less than or equal to 97% of the rated speed, and the current target speed information of the other yaw motors is less than 102% of the rated speed, then the current target speed information of the other yaw motors is increased by 0.2% of the rated speed; If the target speed information of the first yaw motor is greater than 97% of the rated speed, reducing the target speed information of the first yaw motor by 0.3% of the rated speed; The non-overload motor speed adjustment unit is used to determine whether the target speed information of the k yaw motors is equal to the rated speed if the first yaw motor does not exist among the k yaw motors; if there is a yaw motor whose target speed information of the second yaw motor is not equal to the rated speed, adjust the target speed information of the second yaw motor to be equal to the rated speed in steps of 1% of the rated speed.

7. A terminal, characterized in that: The method comprises a processor, an input device, an output device and a memory, wherein the processor, the input device, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program comprises program instructions, and the processor is configured to call the program instructions to execute the method according to any one of claims 2 to 5.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, wherein the computer program includes program instructions, and when the program instructions are executed by a processor, the processor is caused to perform the method according to any one of claims 2 to 5.

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