Transmission chain control method, device, equipment, medium and program of wind driven generator

Abstract

The invention discloses a transmission chain control method and device of a wind driven generator, equipment, a medium and a program, which are used for dragging test of an experiment table transmission chain and drive a generator of the wind driven generator to drive an impeller side of the transmission chain to rotate according to a first torque value through a frequency converter of the wind driven generator. In response to the fact that the position identification on the impeller side reaches the set position, the frequency converter is controlled to stop driving the generator, a first angle value of rotation of the impeller side under the inertia effect after the frequency converter stops driving the generator is determined, and the first torque value is corrected based on the relation between the first angle value and the second angle value to obtain a second torque value; the second angle value is an angle value between the set position and a preset expected stop position, the frequency converter drives the generator to drive the impeller side to rotate according to the second torque value until the position identifier reaches the set position, and the frequency converter is controlled to stop driving the generator, so that the position identifier can finally stop at the expected stop position.

Description

Technical Field

[0001] This application belongs to the technical field of wind power generation, and particularly relates to a control method, device, equipment, medium and program for the drive chain of a wind turbine generator. Background Art

[0002] A wind turbine generator includes an impeller, a generator and a drive chain. The drive chain is a rotational transmission system for transmitting the power generated by the impeller under the action of wind to the generator and enabling it to obtain a corresponding rotational speed. The drive chain usually includes a gearbox, a first transmission shaft and a second transmission shaft. Among them, the input end of the gearbox is connected to the hub of the impeller through the first transmission shaft, and the output end of the gearbox is connected to the generator through the second transmission shaft. When the wind turbine generator is operating, its working principle is that wind energy drives the impeller to rotate, the impeller drives the first transmission shaft to rotate, after the speed is increased by the gearbox inside the gearbox, it is transmitted to the second transmission shaft, and the second transmission shaft drives the moving coil of the generator to rotate. Usually, the rotational speed of the impeller is very low, far from reaching the rotational speed required for the generator to generate electricity. After the speed is increased by the gearbox, the required rotational speed for the generator to generate electricity can be reached. Therefore, the gearbox is also called a speed increaser.

[0003] Before installing the drive chain on site, dragging and testing the drive chain on a test bench is an important link for detecting the product quality of the wind turbine generator. In order to ensure the correctness of the installation position during the hoisting of the on-site unit, it is necessary to stop the impeller side at the desired stop position after the drive chain dragging test on the test bench.

[0004] Currently, in order to stop the impeller side at the desired stop position, the commonly used method is the manual experience method. This method means dragging the drive chain to rotate at a low speed. When the tester determines based on experience that the impeller side is about to reach the desired stop position, the inverter enable is disconnected. This method relies on the tester's experience on the one hand, and on the other hand, for models with a large moment of inertia, multiple operations are required. Therefore, both the accuracy and efficiency are relatively low. In view of this, a solution that can quickly and accurately stop the impeller side of the drive chain at the desired stop position is needed. Summary of the Invention

[0005] The embodiments of this application provide a control method, device, equipment, medium and program for the drive chain of a wind turbine generator, which can accurately stop the impeller side of the drive chain at the desired stop position.

[0006] In a first aspect, the embodiments of this application provide a control method for the drive chain of a wind turbine generator, which is used for the dragging test of the drive chain on a test bench. A position identifier for positioning is set on the impeller side of the drive chain. The method includes:

[0007] Drive the generator in the wind turbine generator to drive the impeller side of the drive chain to rotate according to a first torque value through the inverter in the wind turbine generator;

[0008] In response to the position identifier on the impeller side reaching the set position, control the frequency converter to stop driving the generator;

[0009] Determine a first angle value by which the impeller side rotates under the inertial action after the frequency converter stops driving the generator;

[0010] Based on the relationship between the first angle value and the second angle value, correct the first torque value to obtain a second torque value, where the second angle value is the angle value between the set position and the preset expected stop position;

[0011] Drive the generator through the frequency converter to drive the impeller side to rotate according to the second torque value until the position identifier reaches the set position, and control the frequency converter to stop driving the generator.

[0012] In a second aspect, an embodiment of the present application provides a drive chain control device for a wind turbine, which is used for the drag test of the drive chain of the test bench. A position identifier for positioning is provided on the impeller side of the drive chain. The device includes:

[0013] A control module for driving the generator in the wind turbine to drive the impeller side of the drive chain to rotate according to a first torque value through the frequency converter in the wind turbine;

[0014] The control module is further configured to control the frequency converter to stop driving the generator in response to the position identifier on the impeller side reaching the set position;

[0015] An angle determination module for determining a first angle value by which the impeller side rotates under the inertial action after the frequency converter stops driving the generator;

[0016] A torque correction module for correcting the first torque value based on the relationship between the first angle value and the second angle value to obtain a second torque value, where the second angle value is the angle value between the set position and the set expected stop position;

[0017] The control module is further configured to drive the generator through the frequency converter to drive the impeller side to rotate according to the second torque value until the position identifier reaches the set position, and control the frequency converter to stop driving the generator.

[0018] In a third aspect, an embodiment of the present application provides an electronic device, which includes: a processor and a memory storing computer program instructions;

[0019] When the processor executes the computer program instructions, it implements the drive chain control method of the wind turbine as in the first aspect.

[0020] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which computer program instructions are stored. When the computer program instructions are executed by a processor, the drive chain control method of the wind turbine as in the first aspect is implemented.

[0021] In a fifth aspect, an embodiment of the present application provides a computer program product. When instructions in the computer program product are executed by a processor of an electronic device, the electronic device is caused to execute the method for controlling a drive train of a wind turbine as described in the first aspect.

[0022] The method, device, equipment, medium and program for controlling the drive train of the wind turbine according to the embodiments of the present application are used for the drag test of the drive train of the test bench. Through the frequency converter in the wind turbine, the generator in the wind turbine is driven to drive the impeller side of the drive train to rotate according to a first torque value. In response to the position identifier on the impeller side reaching a set position, the frequency converter is controlled to stop driving the generator, and a first angle value of the impeller side rotating under the inertia effect after the frequency converter stops driving the generator is determined. The first torque value is corrected based on the relationship between the first angle value and a second angle value to obtain a second torque value. The second angle value is the angle value between the set position and a preset expected stop position. The generator is driven by the frequency converter to drive the impeller side to rotate according to the second torque value until the position identifier reaches the set position, and then the frequency converter is controlled to stop driving the generator. In this way, the position identifier can finally stop at the expected stop position. Compared with controlling the drive train based on manual experience, controlling the drive train according to the embodiments of the present application can reduce the uncertainty during manual control of shutdown, is not affected by personnel experience, and can make the drive train quickly and accurately stop at the expected stop position. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0024] Figure 1 is a schematic flowchart of the method for controlling the drive train of the wind turbine provided by the embodiment of the present application;

[0025] Figure 2 is a schematic diagram of the drive train provided by the embodiment of the present application;

[0026] Figure 3 is a schematic diagram of the impeller side provided by the embodiment of the present application;

[0027] Figure 4 is a schematic diagram of the impeller side provided by the embodiment of the present application;

[0028] Figure 5 is a schematic structural diagram of the device for controlling the drive train of the wind turbine provided by the embodiment of the present application;

[0029] Figure 6 is a schematic structural diagram of the electronic device provided by the embodiment of the present application. Detailed implementation manners

[0030] The features and exemplary embodiments of various aspects of the present application will be described in detail below. To make the objectives, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than limiting the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by showing examples of the present application.

[0031] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0032] After a drag test is performed on the drive chain on the test bench, the impeller side of the drive chain can accurately stop at the desired stop position. Embodiments of the present application provide a drive chain control method, device, equipment, medium and program for a wind turbine. The drive chain control method, device, equipment, medium and program provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings, through specific embodiments and their application scenarios.

[0033] The drive chain control method for a wind turbine provided by the embodiments of the present application can be used to control the drive chain in the drag test scenario of the drive chain of a wind turbine. The following combines Figures 1 - 4 The drive chain control method for a wind turbine provided by the embodiments of the present application will be described in detail. It should be noted that the execution subject of the drive chain control method for a wind turbine provided by the embodiments of the present application can be a drive chain control device of a wind turbine. In the embodiments of the present application, taking the drive chain control device of a wind turbine executing the drive chain control method of a wind turbine as an example, the drive chain control method for a wind turbine provided by the embodiments of the present application is described.

[0034] See Figure 1, is a schematic flowchart of the drive chain control method for the wind turbine provided by the embodiment of the present application. As Figure 1 shown, the method may include the following steps S11 - S15, which will be specifically described below.

[0035] Step S11, drive the generator in the wind turbine to drive the impeller side of the drive chain to rotate according to the first torque value through the frequency converter in the wind turbine.

[0036] The drive chain control method for the wind turbine provided by the embodiment of the present application can control the drive chain when performing a drag test on the drive chain of the wind turbine.

[0037] In some embodiments of the present application, refer to Figure 2 , is a schematic structural diagram of the drive chain in the wind turbine. As Figure 2 shown, the drive chain 210 includes a gearbox 211, a first transmission shaft 212, and a second transmission shaft 213. The input end of the gearbox 211 is connected to the hub of the impeller 220 in the wind turbine through the first transmission shaft 212. The end of the first transmission shaft 212 used to connect to the hub of the impeller 220 is referred to as the impeller side of the drive chain 210. The output end of the gearbox 211 is connected to the generator 230 of the wind turbine through the second transmission shaft 213.

[0038] When performing a drag test on the drive chain 210, the test power supply system of the test bench is used to provide a test power supply. The frequency converter in the wind turbine can apply a voltage to the winding coils of the generator 230. At this time, under the action of electromagnetic induction, the moving coil of the generator 230 starts to rotate and drives the second transmission shaft 213 to rotate. After the rotation of the second transmission shaft 213 is decelerated by the gearbox in the gearbox 211, it is transmitted to the first transmission shaft 212, thereby driving the first transmission shaft 212 to rotate, that is, driving the impeller side of the drive chain 210 to rotate. Based on this, in the above step S11, the user can set the first torque value according to the test requirements, and then control the frequency converter to apply a voltage to the winding coils of the generator 230 based on the first torque value, so that the generator 230 can drive the second transmission shaft 213 in the drive chain 210 to rotate according to the first torque value, and then drive the first transmission shaft 212 to rotate, thereby driving the impeller side of the drive chain 210 to rotate.

[0039] Step S12, in response to the position identifier on the impeller side reaching the set position, control the frequency converter to stop driving the generator.

[0040] In some embodiments of the present application, a position identifier for positioning is provided on the impeller side of the drive chain. The position and style of the position identifier can be set according to the actual situation of the drive chain. For example, a certain component on the impeller side can be designated as the position identifier or a marking line can be set on the impeller side. This embodiment does not make specific limitations on this.

[0041] In some embodiments of the present application, referring to Figure 3 , it is a schematic diagram of the impeller side 310 of the drive chain, which includes a position identifier 311, as Figure 3 shown, and the position identifier therein is a marking line provided on the impeller side.

[0042] In some embodiments of the present application, the user can specify a position on the circumference of the impeller side as a set position according to the actual situation. During the process of driving the impeller side to rotate by the generator, it is possible to detect in real time whether the position identifier reaches the set position. After determining that the position identifier reaches the set position, the frequency converter is controlled to stop driving the generator, that is, the frequency converter is controlled to stop applying voltage to the winding coils of the generator. Among them, the set position can be a position other than the expected stop position specified by the user according to the actual situation. The expected stop position is the position where the user hopes the impeller side to stop after the dragging test ends, that is, the position where the position identifier stops after the user hopes the impeller side to stop rotating. The expected stop position can also be a position specified by the user on the circumference of the impeller side according to the actual situation. Exemplarily, the expected stop position can be the 12 o'clock position or the centering position of the drive chain. Referring to Figure 3 , the position where the position identifier 311 stops is the 12 o'clock position.

[0043] Step S13: Determine the first angle value of the rotation of the impeller side under the inertial action after the frequency converter stops driving the generator.

[0044] In some embodiments of the present application, after the frequency converter stops driving the generator, due to the large rotational inertia when the drive chain stops, the drive chain will continue to rotate for a period of time under the action of the moment of inertia. The angle turned by the impeller side during this period is the first angle of the rotation of the impeller side under the inertial action. Based on this, when the frequency converter stops driving the generator, the angle of rotation of the impeller side is measured until it is measured that the impeller side stops rotating, and the angle value measured during this period is used as the first angle value of the rotation of the impeller side under the inertial action. This first angle value is also the angle value of the position identifier on the impeller side rotating under the inertial action.

[0045] Step S14: Modify the first torque value based on the relationship between the first angle value and the second angle value to obtain the second torque value. The second angle value is the angle value between the set position and the preset expected stop position.

[0046] In some embodiments of the present application, both the set position and the expected stop position are positions on the circumference of the impeller side specified by the user. Therefore, the angle value between the set position and the expected stop position can also be obtained by measurement in advance, and this angle value is used as the second angle value.

[0047] The drive chain control method for a wind turbine provided by an embodiment of the present application aims to make the position identifier stop at the desired stop position when the impeller side stops rotating. Its control principle is that before the position identifier reaches the desired stop position, that is, when it reaches the set position, the frequency converter is controlled to stop driving the generator, and then under the action of inertia, the position identifier stops at the desired stop position.

[0048] However, considering that different drive chains have different inertias, it is difficult to obtain the moment of inertia required for the impeller side to rotate from the set position to the desired stop position in a short time. After the frequency converter drives the generator 230 to rotate, through the speed regulation and power transmission functions of the gearbox 211, the high-speed rotation of the generator is converted into the low-speed rotation of the impeller. Since the design parameters of the gearboxes of different unit models are different, the inertia of the drive chain is manifested as different.

[0049] Therefore, the frequency converter drives the generator to rotate according to the first torque value, and when the position identifier reaches the set position, the frequency converter is controlled to stop driving the generator, so as to determine the first angle value that the impeller side can rotate under the inertia corresponding to the first torque value. Then, according to the characteristic that the acceleration of the impeller side is constant under the action of inertia, by comparing the first angle value with the second angle value and based on the relationship between the two, the first torque value is corrected, so as to obtain the second torque value that can make the position identifier of the impeller side stop at the desired stop position under the action of inertia.

[0050] Step S15: The frequency converter drives the generator to drive the impeller side to rotate according to the second torque value until the position identifier reaches the set position, and the frequency converter is controlled to stop driving the generator.

[0051] In some embodiments of the present application, after obtaining the second torque value, the frequency converter drives the generator to drive the impeller side to rotate according to the second torque value again until the position identifier reaches the set position, and the frequency converter is controlled to stop driving the generator. In this way, after the frequency converter stops driving the generator, the impeller side continues to rotate under inertial rotation, and the desired stop position where the position identifier stops later can be achieved.

[0052] The drive chain control method for a wind turbine provided by an embodiment of the present application drives a generator in the wind turbine to drive the impeller side of the drive chain to rotate according to a first torque value through an inverter in the wind turbine. In response to a position identifier on the impeller side reaching a set position, the inverter is controlled to stop driving the generator, and a first angle value of the impeller side rotating under the inertia effect after the inverter stops driving the generator is determined. The first torque value is corrected based on the relationship between the first angle value and a second angle value to obtain a second torque value. The second angle value is the angle value between the set position and a preset expected stop position. The generator is driven by the inverter to drive the impeller side to rotate according to the second torque value until the position identifier reaches the set position, and then the inverter is controlled to stop driving the generator. In this way, the position identifier can finally stop at the expected stop position. Compared with controlling the drive chain based on manual experience, controlling the drive chain according to the embodiment of the present application can reduce the uncertainty during manual control shutdown, is not affected by personnel experience, and can make the drive chain quickly and accurately stop at the expected stop position, especially suitable for models with a large moment of inertia.

[0053] The drive chain control method for a wind turbine provided by an embodiment of the present application can correct the torque value in a short time, so it is less affected by the temperature of the gearbox, and is applicable to different seasons, climates, and wind turbines. At the same time, correcting the torque value in a short time can reduce the influence of the flow state of the gear oil inside the gearbox.

[0054] In addition, in the prior art, in addition to using the manual experience method to control the drive chain to stop at the desired stop position, the high-speed end brake method or the frequency converter excitation control can also be used. Among them, the high-speed end brake method means that when the drive chain reaches the desired stop position, the frequency converter is controlled to stop driving the generator, and the high-speed end, that is, the second transmission shaft connected to the generator, is braked. On the one hand, this method is limited by the test environment of the wind turbine test bench. Since the drive chain is only a part of the wind turbine and has not been spliced with the nacelle part, there is no braking function. Even if there is a braking function, there is no fixed position for the braking device, so it is difficult to implement braking. On the other hand, braking when the second transmission shaft is rotating may also cause brake pad friction or displacement or even overturning of the drive chain. The drive chain control method provided by the embodiments of the present application does not require braking, is easier to implement, and because there is no need for braking, there will be no brake pad friction, which is safer. The frequency converter excitation control means that when the drive chain reaches the desired stop position, the frequency converter is controlled to apply a braking torque in the reverse direction. However, due to the large rotational inertia of the drive chain during shutdown, and different wind turbines have different inertias, it is difficult to obtain an accurate braking torque value in a short time. In addition, the torque direction involves the phase sequence at the frequency converter end, and it is difficult to quickly switch the phase sequence in a short time when the drive chain is being dragged. The drive chain control method provided by the embodiments of the present application does not require calculating the braking torque value and controlling the frequency converter to change the torque direction, and is easier to implement. It can be seen that the drive chain control method provided by the embodiments of the present application is simpler and more reliable. Compared with other methods, it is less affected by the external environment, operation method, and operation duration, and can reduce the duration of unit testing.

[0055] Moreover, the drive chain control method provided by the embodiments of the present application can also reflect the mechanical state during the rotation of the drive chain, which is of great significance for improving the quality and efficiency of factory inspection and the safety of on-site operation.

[0056] In some embodiments of the present application, according to the characteristic that the acceleration of the impeller side is constant under the action of inertia, it can be considered that under the action of inertia, the position identifier on the impeller side makes a uniformly accelerated circular motion around the center of the impeller side. According to the velocity formula V = at and displacement formula S = 0.5at of uniformly accelerated motion 2 , it can be obtained that:

[0057] When the position identifier on the impeller side moves at V 1 , according to V 1 = at 1 , it can be obtained that the velocity of the position identifier drops from V 1 to 0, that is, the time required to stop moving

[0058] Since the position identifier undergoes a uniformly accelerated circular motion, the displacement of its motion is the arc length it has turned, which can also be understood as the angle it has turned. Therefore, S can represent the angle value that the position identifier has turned. Based on it can be obtained that the angle S through which the position identifier rotates from velocity V 1 to the velocity equal to 0 is 1 as follows:

[0059]

[0060] Similarly, the time required for the position identifier to rotate from velocity V 2 to the velocity equal to 0 and the angle S through which it rotates are as follows: 2 as follows:

[0061]

[0062] Since the acceleration a is the same, it can be obtained that:

[0063]

[0064] Furthermore, it can be obtained that:

[0065]

[0066] Among them, the velocity V and the torque value T of the generator are in a direct proportional relationship. Therefore, it can be further obtained that:

[0067]

[0068] It can be seen from this that according to the ratio of the angles through which the position identifier rotates, the ratio of the torques of the generator required for the rotation angles can be obtained. Based on this, when the first angle value through which the position identifier rotates under the action of the first torque value and the second torque value is known, and the second angle value that the position identifier actually needs to rotate is known, the second torque value can be calculated according to the above formula.

[0069] Specifically, in step S14 above, correcting the first torque value based on the relationship between the first angle value and the second angle value to obtain the second torque value may include:

[0070] Determining a first ratio of the first angle value and the second angle value;

[0071] Correcting the first torque value according to the first ratio to obtain the second torque value.

[0072] Furthermore, correcting the first torque value according to the first ratio to obtain the second torque value may include:

[0073] Taking the arithmetic square root of the first ratio as a second ratio of the first torque value and the second torque value;

[0074] Use the quotient of the first torque value and the second ratio as the second torque value.

[0075] In the above manner, the second torque value required for the position identifier to rotate from the set position to the desired stop position under the action of inertia can be obtained.

[0076] In some embodiments of the present application, a plurality of rotation speed measurement holes are uniformly distributed along the circumference on the impeller side. The wind turbine further includes a first proximity switch disposed outside the impeller side and capable of being triggered by the plurality of rotation speed measurement holes. Here, the rotation speed measurement holes and the first proximity switch can be the original structures in the wind turbine for measuring the rotation speed of the impeller side. For example Figure 3 As shown, which shows a rotation speed measurement hole 312 provided on the impeller side 310 and a first proximity switch 320 located outside the impeller side 310. Based on this, in the above step S13, determining the first angle value of the impeller side rotating under the action of inertia after the frequency converter stops driving the generator may include:

[0077] During the rotation of the impeller side under the action of inertia, detect the first rotation speed measurement hole that triggers the first proximity switch through the first proximity switch;

[0078] Use the angular value between the rotation speed measurement hole that first triggers the first proximity switch and the rotation speed measurement hole that finally triggers the first proximity switch among the first rotation speed measurement holes as the first angle value.

[0079] Here, the rotation speed measurement holes on the impeller side are uniformly distributed along the circumference. Therefore, the angle between any two adjacent rotation speed measurement holes is fixed and consistent, and is equal to where m is the total number of rotation speed measurement holes provided on the impeller side. Thus, after determining the first rotation speed measurement hole, the first angle value can be calculated according to the number of the first rotation speed measurement holes. For example, if a total of 36 measurement holes are provided on the impeller side, the angle between any two adjacent rotation speed measurement holes is 10°. If the number of the first rotation speed measurement holes is n, the first angle value is n * 10°.

[0080] In this way, the first angle value can be quickly and accurately determined by determining the rotation speed measurement holes passing through the first proximity switch.

[0081] Correspondingly, according to the above content, when measuring the angle value through the rotation speed measurement holes and the first proximity switch, it is only necessary to determine the number of rotation speed measurement holes corresponding to the angle value, because the angle value is in a proportional relationship with the number of rotation speed measurement holes corresponding to the angle value. Based on this, when determining the first ratio of the first angle value and the second angle value, the following steps may be included:

[0082] Determine the first number of the first rotation speed measurement holes;

[0083] Determine a second rotational speed measurement hole corresponding to the set position and a third rotational speed measurement hole corresponding to the desired stop position among multiple rotational speed measurement holes;

[0084] Determine the second quantity of rotational speed measurement holes located between the second rotational speed measurement hole and the third rotational speed measurement hole along the rotational direction on the impeller side;

[0085] Determine the ratio of the first quantity to the second quantity as the first ratio of the first angle value to the second angle value.

[0086] In some embodiments of the present application, the position identifier operates at a constant speed under the first torque value T 1 When reaching the set position, control the frequency converter to stop driving the generator, record the first quantity N of rotational speed measurement holes passed by the impeller side due to inertia, and count the second quantity M of rotational speed measurement holes between the set position and the desired stop position. Since the angular values between any two adjacent rotational speed measurement holes are equal, therefore Based on this, the second torque value T can be calculated according to the following formula 2 :

[0087]

[0088] In this way, there is no need to calculate the specific first angle value and second angle value, and only the quantities of rotational speed measurement holes corresponding to the two angle values need to be known, which is convenient and fast.

[0089] In some embodiments of the present application, a first stopper is provided on the impeller side, and the wind turbine further includes a second proximity switch provided outside the impeller side and capable of being triggered by the first stopper. Among them, the first stopper corresponds to the set position. When the first stopper triggers the second proximity switch, it is determined that the position identifier reaches the set position. For example, taking the set position being set opposite the second proximity switch, that is, the included angle with the second proximity switch being 180°, see Figure 3 and Figure 4 , which shows that a first stopper 313 is provided on the impeller side 310 and a second proximity switch 330 is located outside the impeller side 310. It can be seen from Figure 4 that when the first stopper 313 triggers the second proximity switch 330, that is, when the first stopper 313 is located at the position corresponding to the second proximity switch 330, the position identifier 311 is located opposite the second proximity switch 330, that is, at the set position forming an angle of 180° with the second proximity switch 330.

[0090] Based on the above settings, the step S12 of controlling the frequency converter to stop driving the generator in response to the position identifier reaching the set position may include:

[0091] In response to the second proximity switch being triggered by the first stopper, control the frequency converter to stop driving the generator.

[0092] When the frequency converter drives the generator to rotate, it is possible to detect whether the second proximity switch is triggered by the first stopper. When it is detected that the second proximity switch is triggered by the first stopper, it is determined that the position identifier has reached the set position, thereby controlling the frequency converter to stop driving the generator.

[0093] In this way, compared with manually controlling the frequency converter to stop driving the generator by humans, controlling based on the action of the mechanical switch is more accurate and timely.

[0094] In some embodiments of the present application, in addition to the first stopper on the impeller side, other stoppers capable of triggering the position of the second proximity switch except the first stopper may be provided, for example Figure 4 As shown, a total of 9 stoppers are provided on the impeller side 310, and all these 9 stoppers can trigger the second proximity switch 330. Based on this, in order to avoid other stoppers except the first stopper from triggering the second proximity switch and causing incorrect control of the frequency converter to stop driving the generator, before controlling the frequency converter to stop driving the generator in response to the first stopper triggering the second proximity switch, the following steps may be executed first:

[0095] In response to the second proximity switch being triggered by the stopper before the first stopper, start the frequency converter enable cancellation program before the second proximity switch is triggered by the first stopper. The frequency converter enable cancellation program is used to cancel the enable of the frequency converter after the second proximity switch is triggered.

[0096] Correspondingly, controlling the frequency converter to stop driving the generator in response to the second proximity switch being triggered by the first stopper includes:

[0097] In response to the second proximity switch being triggered by the first stopper, cancel the enable of the frequency converter based on the frequency converter enable cancellation program, so that the frequency converter stops driving the generator.

[0098] A frequency converter enable cancellation program can be preset in the wind turbine generator. Only after the frequency converter enable cancellation program is started, when a stopper triggers the second proximity switch, the enable of the frequency converter is cancelled. Otherwise, when a stopper triggers the second proximity switch, the enable of the frequency converter is not cancelled. In this way, it is possible to avoid incorrect stopping of the generator by the frequency converter by other stoppers, and at the same time, the drive chain control method provided by the embodiments of the present application can be applied to the drive chain with multiple stoppers provided on the impeller side, without the need to modify or transform the wind turbine unit, which is more convenient for workshop operation and implementation.

[0099] In some embodiments of the present application, a wind turbine may include an HMI interface for human-machine interaction. A control for starting the frequency converter enable cancellation program may be provided in the HMI interface. After determining that the second proximity switch is triggered by the previous stop block of the first stop block and before the first stop block triggers the second proximity switch, a tester can start the frequency converter enable cancellation program by operating the control for starting the frequency converter enable cancellation program, so that when the first stop block triggers the second proximity switch, the enable of the frequency converter can be cancelled through the frequency converter enable cancellation program.

[0100] In some embodiments of the present application, a program for identifying stop blocks may also be provided in the wind turbine. After the second proximity switch is triggered, this program can automatically identify whether the stop block triggering the second proximity switch is the previous stop block of the first stop block. If it is determined to be the previous stop block, the frequency converter enable cancellation program is automatically started, so that when the first stop block triggers the second proximity switch, the enable of the frequency converter can be cancelled through the frequency converter enable cancellation program.

[0101] In this way, manual operation can be reduced and control accuracy can be improved.

[0102] In some embodiments of the present application, after the above step S15, the following steps may further be executed:

[0103] Determine a third angle value of the impeller side rotating under the inertia effect after the frequency converter stops driving the generator;

[0104] Determine whether the position identifier stops at the expected stop position;

[0105] In response to the position identifier not stopping at the expected stop position, correct the second torque value based on the relationship between the third angle value and the second angle value to obtain a third torque value;

[0106] Drive the generator through the frequency converter to drive the impeller side to rotate according to the third torque value until the position identifier reaches the set position, and control the frequency converter to stop driving the generator.

[0107] Here, the method for determining the third angle value is the same as the method for determining the first angle value, and the method for correcting the second torque value is the same as the method for correcting the first torque value, which will not be elaborated here.

[0108] Through the above method, continuous correction of the torque value can be achieved to ensure the accuracy of stop position control, so that the operation process will not be too long.

[0109] In some embodiments of the present application, a second stop block corresponding to the expected stop position may be provided on the impeller side. The second stop block can trigger the second proximity switch. Based on this, determining whether the position identifier stops at the expected stop position may include:

[0110] Determine whether the second stop block stops at the trigger position of the second proximity switch;

[0111] In response to the second stop block stopping at the trigger position of the second proximity switch, determine that the position identifier stops at the desired stop position;

[0112] In response to the second stop block not stopping at the trigger position of the second proximity switch, determine that the position identifier does not stop at the desired stop position.

[0113] Wherein, the trigger position of the second proximity switch refers to the position where the stop block can trigger the second proximity switch, that is, when the stop block is at the trigger position of the second proximity switch, the second proximity switch will be triggered.

[0114] In some embodiments of the present application, taking the desired stop position as the 12 o'clock position as an example, refer to Figure 3 and Figure 4 , a second stop block 314 is provided on the impeller side 310. It can be seen from Figure 3 that when the second stop block 314 is at the trigger position of the second proximity switch, the position identifier 311 is at the 12 o'clock position, that is, at the desired stop position.

[0115] Through the above method, it can be accurately identified whether the position identifier stops at the desired stop position.

[0116] Next, based on experimental data, the accuracy of the drive chain control method for the wind turbine provided by the embodiments of the present application will be described.

[0117] Taking the drive chain of a certain type of wind turbine as an example and testing it based on the drive chain control method for the wind turbine provided by the embodiments of the present application.

[0118] In this test, the desired stop position is set to the 12 o'clock position, the set position is set to the position opposite to the second proximity switch, the first torque value is set to 1500 Nm. After canceling the inverter enable, the impeller rotates through an angle of 8 speed measurement holes under the action of inertia. The number of speed measurement holes between the set position and the desired stop position is 27.5. According to the following formula:

[0119]

[0120] The calculated corrected second torque value is 2781.07 Nm. Use the torque value of 2781.07 Nm again to drag the drive chain to rotate at a constant speed. When reaching the set position, cancel the inverter enable. Under the action of inertia, the position identifier accurately stops at the desired stop position, and the second proximity switch is normally triggered by the second stop block. The test data and test results of the drive chain of this type of wind turbine are shown in Table 1.

[0121]

[0122] As can be seen, the drive chain control method of the wind turbine provided by the embodiment of the present application can accurately stop the impeller side at the desired stop position.

[0123] Based on the drive chain control method of the wind turbine provided by the above embodiment, correspondingly, the present application also provides a specific implementation manner of the drive chain control device of the wind turbine. Please refer to the following embodiments.

[0124] See Figure 5 , which is a schematic diagram of the drive chain control device of the wind turbine provided by the embodiment of the present application. This device is used for the drag test of the drive chain of the test bench. As Figure 5 shown, the drive chain control device 500 includes the following modules:

[0125] A control module 501, configured to drive a generator in the wind turbine to drive the impeller side of the drive chain to rotate according to a first torque value through an inverter in the wind turbine;

[0126] The control module 501 is further configured to control the inverter to stop driving the generator in response to the position identifier on the impeller side reaching the set position;

[0127] An angle determination module 502, configured to determine a first angle value of the impeller side rotating under the inertial action after the inverter stops driving the generator;

[0128] A torque correction module 503, configured to correct the first torque value based on the relationship between the first angle value and a second angle value to obtain a second torque value, where the second angle value is the angle value between the set position and the set desired stop position;

[0129] The control module 501 is further configured to drive the generator to drive the impeller side to rotate according to the second torque value through the inverter until the position identifier reaches the set position, and control the inverter to stop driving the generator.

[0130] The drive chain control device of the wind turbine provided by the embodiment of the present application drives the generator in the wind turbine to drive the impeller side of the drive chain to rotate according to a first torque value through an inverter in the wind turbine. In response to the position identifier on the impeller side reaching the set position, the inverter is controlled to stop driving the generator, and a first angle value of the impeller side rotating under the inertial action after the inverter stops driving the generator is determined. The first torque value is corrected based on the relationship between the first angle value and the second angle value to obtain a second torque value. The second angle value is the angle value between the set position and the expected stop position set in advance. The generator is driven by the inverter to drive the impeller side to rotate according to the second torque value until the position identifier reaches the set position, and the inverter is controlled to stop driving the generator. In this way, the position identifier can finally stop at the expected stop position. Compared with controlling the drive chain based on manual experience, controlling the drive chain according to the embodiment of the present application can reduce the uncertainty during manual control shutdown, is not affected by personnel experience, and can make the drive chain quickly and accurately stop at the expected stop position.

[0131] In some embodiments of the present application, the torque correction module 503 includes:

[0132] A ratio calculation unit for determining a first ratio of the first angle value and the second angle value;

[0133] A correction unit for correcting the first torque value according to the first ratio to obtain a second torque value.

[0134] In some embodiments of the present application, a plurality of rotation speed measurement holes are uniformly distributed along the circumference on the impeller side, and a first proximity switch is arranged outside the impeller side. The angle determination module 502 is specifically used for:

[0135] During the rotation of the impeller side under the inertial action, the first rotation speed measurement hole that triggers the first proximity switch is detected through the first proximity switch;

[0136] The angle value between the rotation speed measurement hole that first triggers the first proximity switch and the rotation speed measurement hole that finally triggers the first proximity switch in the first rotation speed measurement holes is used as the first angle value.

[0137] In some embodiments of the present application, the ratio determination unit is specifically used for:

[0138] Determining a first quantity of the first rotation speed measurement holes;

[0139] Determining a second rotation speed measurement hole corresponding to the set position and a third rotation speed measurement hole corresponding to the expected stop position among the plurality of rotation speed measurement holes;

[0140] Determining a second quantity of the rotation speed measurement holes located between the second rotation speed measurement hole and the third rotation speed measurement hole along the rotation direction of the impeller side;

[0141] Determine the ratio of the first quantity to the second quantity as the first ratio of the first angular value to the second angular value.

[0142] In some embodiments of the present application, a first stopper is provided on the impeller side, and a second proximity switch capable of being triggered by the first stopper is further provided outside the impeller side. The control module 501 is specifically configured to:

[0143] In response to the second proximity switch being triggered by the first stopper, control the frequency converter to stop driving the generator.

[0144] In some embodiments of the present application, there are also stoppers other than the first stopper on the impeller side that can trigger the position of the second proximity switch. The control module 501 is further configured to:

[0145] Before responding to the first stopper triggering the second proximity switch and controlling the frequency converter to stop driving the generator, in response to the second proximity switch being triggered by the stopper before the first stopper, before the second proximity switch is triggered by the first stopper, start the frequency converter enable cancellation program. The frequency converter enable cancellation program is used to cancel the enable of the frequency converter after the second proximity switch is triggered;

[0146] The control module 501 is specifically configured to:

[0147] In response to the second proximity switch being triggered by the first stopper, cancel the enable of the frequency converter based on the frequency converter enable cancellation program, and cause the frequency converter to stop driving the generator.

[0148] The drive chain control device of the wind turbine provided by the embodiments of the present application can implement Figures 1 to 4 each process implemented by the method embodiments. To avoid repetition, it will not be elaborated here.

[0149] Figure 6 The schematic diagram of the hardware structure of the electronic device provided by the embodiments of the present application is shown.

[0150] The electronic device 600 may include a processor 601 and a memory 602 storing computer program instructions.

[0151] Specifically, the above-mentioned processor 601 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0152] The memory 602 may include a mass memory for data or instructions. By way of example and not limitation, the memory 602 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory 602 may include removable or non-removable (or fixed) media. Where appropriate, the memory 602 may be internal or external to the integrated gateway disaster recovery device. In a particular embodiment, the memory 602 is a non-volatile solid-state memory. The memory 602 may include a read-only memory (ROM), a random access memory (RAM), a disk storage media device, an optical storage media device, a flash memory device, an electrical, optical, or other physical / tangible memory storage device. Thus, generally, the memory 602 includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it can perform the operations described in any of the above-described wind turbine drive train control methods of the embodiments.

[0153] The processor 601 reads and executes the computer program instructions stored in the memory 602 to implement any of the above-described wind turbine drive train control methods of the embodiments.

[0154] In one example, the electronic device 600 may further include a communication interface 603 and a bus 610. Among them, as Figure 6 shown, the processor 601, the memory 602, and the communication interface 603 are connected through the bus 610 and complete communication with each other.

[0155] The communication interface 603 is mainly used to implement communication between the various modules, devices, units, and / or devices in the embodiments of the present application.

[0156] The bus 610 includes hardware, software, or both, and couples the components of the online data flow metering device to each other. By way of example and not limitation, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a MicroChannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or a combination of two or more of these. Where appropriate, the bus 610 may include one or more buses. Although the embodiments of the present application describe and illustrate specific buses, the present application contemplates any suitable bus or interconnect.

[0157] In addition, in combination with the drive train control method of the wind turbine in the above embodiments, an embodiment of the present application can be implemented by providing a computer storage medium. Computer program instructions are stored on the computer storage medium; when the computer program instructions are executed by a processor, any one of the drive train control methods of the wind turbine in the above embodiments is implemented.

[0158] It should be clear that the present application is not limited to the specific configurations and processes described above and illustrated in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and illustrated as examples. However, the method process of the present application is not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications, and additions, or change the order between the steps after understanding the spirit of the present application.

[0159] The functional blocks shown in the above structure block diagrams can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), appropriate firmware, a plug-in, a functional card, and so on. When implemented in software, the elements of the present application are programs or code segments used to perform the required tasks. The program or code segment can be stored in a machine-readable medium or transmitted via a data signal carried in a carrier wave on a transmission medium or a communication link. A "machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, Erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, and so on. The code segment can be downloaded via a computer network such as the Internet, an intranet, and so on.

[0160] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps. That is, the steps can be executed in the order mentioned in the embodiments, or different from the order in the embodiments, or several steps can be executed simultaneously.

[0161] As described above with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems) and computer program products according to embodiments of the present disclosure. It should be understood that each block in the flowchart and / or block diagram, and the combination of blocks in the flowchart and / or block diagram, 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, or other programmable data processing device to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the functions / actions specified in one or more blocks of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It should also be understood that each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, can also be implemented by dedicated hardware that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0162] As described above, the above is only the specific implementation manner of this application. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described systems, modules, and units can refer to the corresponding processes in the foregoing method embodiments and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A control method for the drive chain of a wind turbine, used for the drag test of the drive chain on a test bench, characterized in that, a position identifier for positioning is provided on the impeller side of the drive chain, and the method includes: driving the generator in the wind turbine by the frequency converter in the wind turbine to drive the impeller side of the drive chain to rotate according to a first torque value; in response to the position identifier on the impeller side reaching a set position, controlling the frequency converter to stop driving the generator; determining a first angle value by which the impeller side rotates under the inertial action after the frequency converter stops driving the generator; correcting the first torque value based on the relationship between the first angle value and a second angle value to obtain a second torque value, where the second angle value is the angle value between the set position and a preset desired stop position; driving the generator by the frequency converter to drive the impeller side to rotate according to the second torque value until the position identifier reaches the set position, and controlling the frequency converter to stop driving the generator.

2. The method according to claim 1, characterized in that, the correcting the first torque value based on the relationship between the first angle value and the second angle value to obtain a second torque value includes: determining a first ratio between the first angle value and the second angle value; correcting the first torque value according to the first ratio to obtain a second torque value.

3. The method according to claim 2, characterized in that, a plurality of rotation speed measurement holes are evenly distributed along the circumference on the impeller side, and a first proximity switch is provided outside the impeller side. The determining the first angle value by which the impeller side rotates under the inertial action after the frequency converter stops driving the generator includes: during the rotation of the impeller side under the inertial action, detecting, by the first proximity switch, the first rotation speed measurement hole that triggers the first proximity switch; taking the angle value between the rotation speed measurement hole that first triggers the first proximity switch and the rotation speed measurement hole that last triggers the first proximity switch among the first rotation speed measurement holes as the first angle value.

4. The method according to claim 3, characterized in that, the determining the first ratio between the first angle value and the second angle value includes: determining a first quantity of the first rotation speed measurement holes; determining a second rotation speed measurement hole corresponding to the set position and a third rotation speed measurement hole corresponding to the desired stop position among the plurality of rotation speed measurement holes; determining a second quantity of the rotation speed measurement holes located between the second rotation speed measurement hole and the third rotation speed measurement hole along the rotation direction of the impeller side; taking the ratio of the first quantity to the second quantity as the first ratio between the first angle value and the second angle value.

5. The method according to any one of claims 1-4, characterized in that, a first stop block is provided on the impeller side, and a second proximity switch that can be triggered by the first stop block is further provided outside the impeller side. The in response to the position identifier reaching the set position, controlling the frequency converter to stop driving the generator includes: In response to the second proximity switch being triggered by the first stopper, control the frequency converter to stop driving the generator.

6. The method according to claim 5, wherein, on the impeller side, there are also stoppers other than the first stopper that can trigger the position of the second proximity switch. Before controlling the frequency converter to stop driving the generator in response to the first stopper triggering the second proximity switch, the method further includes: In response to the second proximity switch being triggered by the stopper before the first stopper, start the frequency converter enable cancellation program before the second proximity switch is triggered by the first stopper. The frequency converter enable cancellation program is used to cancel the enable of the frequency converter after the second proximity switch is triggered; The step of controlling the frequency converter to stop driving the generator in response to the second proximity switch being triggered by the first stopper includes: In response to the second proximity switch being triggered by the first stopper, cancel the enable of the frequency converter based on the frequency converter enable cancellation program, so that the frequency converter stops driving the generator.

7. A drive chain control device for a wind turbine, used for the drag test of the drive chain of the test bench, wherein, a position identifier for positioning is provided on the impeller side of the drive chain, and the device includes: a control module, configured to drive the generator in the wind turbine to drive the impeller side of the drive chain to rotate according to a first torque value through the frequency converter in the wind turbine; the control module is further configured to control the frequency converter to stop driving the generator in response to the position identifier on the impeller side reaching the set position; an angle determination module, configured to determine a first angle value of the impeller side rotating under the inertial action after the frequency converter stops driving the generator; a torque correction module, configured to correct the first torque value based on the relationship between the first angle value and a second angle value to obtain a second torque value, where the second angle value is the angle value between the set position and the set desired stop position; the control module is further configured to drive the generator to drive the impeller side to rotate according to the second torque value through the frequency converter until the position identifier reaches the set position, and control the frequency converter to stop driving the generator.

8. An electronic device, wherein, the electronic device includes: a processor and a memory storing computer program instructions; when the processor executes the computer program instructions, it implements the drive chain control method of the wind turbine according to any one of claims 1-6.

9. A computer-readable storage medium, wherein, computer program instructions are stored on the computer-readable storage medium, and when the computer program instructions are executed by a processor, they implement the drive chain control method of the wind turbine according to any one of claims 1-6.

10. A computer program product, wherein, when the instructions in the computer program product are executed by the processor of the electronic device, the electronic device is caused to execute the drive chain control method of the wind turbine according to any one of claims 1-6.

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