A method, system and medium for simulating start-up of a fan in head and tail wind

Abstract

The application provides a fan forward and reverse wind starting simulation test method, system and medium, the method comprises the following steps: controlling the output driving torque of the dynamometer motor according to the set rotating speed to simulate external wind information; controlling the rotation of the load motor according to the preset load characteristic curve to output the load torque; controlling the passive rotation of the measured motor to the balance rotating speed under the action of the driving torque and the load torque, and acquiring the running state information of the measured motor in real time; analyzing whether the measured motor reaches the preset cut-in condition information, if yes, starting the control strategy of the measured motor to control the measured motor to cut into the forward wind working condition or the reverse wind working condition; when cutting into the forward wind working condition, controlling the forward rotation of the dynamometer motor, and outputting the electromagnetic torque according to the difference between the target rotating speed and the current rotating speed; when the measured motor cuts into the reverse wind working condition, controlling the reverse rotation of the dynamometer motor, and outputting the forward driving torque to start the measured motor to the target rotating speed; the forward and reverse wind working condition simulation can be completed through the dynamometer test bench, and the test precision and efficiency are improved.

Description

Technical Field

[0001] This application relates to the field of wind turbine simulation testing technology, and more specifically, to a wind turbine start-up simulation testing method, system, and medium in the direction of wind and in the direction of wind. Background Technology

[0002] As an important type of fluid machinery, fans are widely used in air purification, ventilation, and industrial production. The control performance of the fan motor directly affects the fan's operating efficiency and reliability. In practical applications, fans frequently encounter external wind forces, especially when the fan is stopped. In this case, the external wind force may drive the fan impeller to rotate, and the fan motor is in a passive rotation state. Based on the relationship between the external wind direction and the fan's normal rotation direction, the operating conditions can be divided into downwind and upwind conditions. In downwind conditions, the external wind direction is the same as the fan's normal rotation direction; in upwind conditions, the external wind direction is opposite to the fan's normal rotation direction. These two operating conditions place different technical requirements on the fan motor's start-up control.

[0003] Existing methods for verifying the control functions of wind turbine motors primarily rely on wind tunnel testing. In wind tunnel testing, different external wind conditions are simulated by adjusting the wind speed and direction to verify the start-up and operational performance of the wind turbine motor under tailwind and headwind conditions. However, wind tunnel equipment is expensive, with a medium-sized wind tunnel typically costing several million yuan or more, and its operation and maintenance costs are also high. Furthermore, the use of wind tunnel equipment requires scheduling, resulting in long test preparation periods, often several days or even weeks, thus extending product development and verification cycles. In addition, the adjustable range of wind field parameters in wind tunnel equipment is limited, making it difficult to accurately simulate certain specific wind conditions, and the airflow within the wind tunnel exhibits some fluctuation, leading to poor test repeatability. Summary of the Invention

[0004] The purpose of this application is to provide a method, system and medium for simulating wind turbine start-up in both directions. The simulation of wind and tailwind conditions can be completed using a dynamometer, and the two extreme start-up conditions of shutdown in both directions can be stably reproduced. The entire process is carried out under closed-loop control of the dynamometer, which improves the accuracy and efficiency of the test.

[0005] This application embodiment also provides a method for simulating wind turbine start-up in both directions, including: controlling the output drive torque of the dynamometer motor according to a set speed, and simulating external wind force information according to the drive torque;

[0006] The load motor is controlled to rotate according to a preset load characteristic curve, and the load torque is output.

[0007] The tested motor is controlled to passively rotate to a balanced speed under the action of the driving torque and the load torque, and the operating status information of the tested motor is acquired in real time.

[0008] Analyze whether the motor under test has reached the preset cutting condition information based on the motion state information of the motor under test;

[0009] If the preset entry conditions are met, the control strategy of the tested motor is activated to control the tested motor to enter either a tailwind or headwind operating condition.

[0010] When the tested motor enters a downwind operating condition, the dynamometer motor is controlled to rotate forward, and the load motor is controlled to output a resistance torque in the opposite direction to the rotation speed. The tested motor outputs electromagnetic torque based on the difference between the target speed and the current speed.

[0011] When the tested motor enters a headwind condition, the dynamometer motor is controlled to reverse, and the load motor is controlled to output a driving torque in the same direction as the rotation speed. After the tested motor outputs braking torque to reduce the speed to zero, it outputs positive driving torque to start the tested motor to the target speed.

[0012] Optionally, in the wind turbine start-up simulation test method described in the embodiments of this application, the dynamometer motor outputs drive torque according to a set speed, and external wind force information is simulated based on the drive torque, specifically including:

[0013] Based on the correspondence between wind force level and wind turbine input speed, set the set speed of the dynamometer motor corresponding to the target wind force;

[0014] Input the set speed and select the speed closed-loop control mode. The motor speed is stabilized to the set value through PID regulation, and the matching drive torque is output.

[0015] Establish a mapping model between driving torque and external wind force, and convert the driving torque into corresponding external wind force information based on the mapping model.

[0016] Optionally, in the wind turbine start-up simulation test method described in the embodiments of this application, the tested motor is controlled to passively rotate to a balance speed under the action of the driving torque and the load torque, and the operating status information of the tested motor is acquired in real time, specifically including:

[0017] Obtain the current status information of the motor under test and determine whether the current status information indicates that the motor is in a stopped state;

[0018] If the machine is in a stopped state, start the motor under test and the load motor, control the dynamometer motor to output drive torque and the load motor to output corresponding load torque to act on the motor under test, and drive the motor under test to rotate.

[0019] The speed information of the motor under test is acquired in real time, and it is determined whether the speed information is within the set stable range.

[0020] If the value is within the set stable range, the tested motor is determined to have rotated to the equilibrium speed.

[0021] The operating status information of the tested motor is obtained in real time based on the balanced speed of the tested motor.

[0022] Optionally, in the wind turbine start-up simulation test method described in the embodiments of this application, the control logic for the start-up under the wind condition is as follows:

[0023] When the target speed ntarget is greater than the current speed n, the tested motor outputs positive torque acceleration Te>0 until the target speed is reached;

[0024] When the target speed ntarget is less than the current speed n, the measured motor outputs a negative torque deceleration Te<0; the controller enters the feedback operation state.

[0025] Optionally, in the wind turbine start-up simulation test method described in the embodiments of this application, the control strategy construction method of the motor under test is as follows:

[0026] Establish torque balance motion models for cut-in control under tailwind and headwind conditions;

[0027] Based on the torque balance motion model, the simulation conditions for torque and speed are constructed, and a simulation system including the dynamometer motor, the motor under test, the load motor and the corresponding controller is built to obtain the dynamometer test bench.

[0028] Based on the control logic of the dynamometer for both tailwind and headwind conditions, a control strategy is generated.

[0029] Optionally, in the wind turbine start-up simulation test method described in the embodiments of this application, the motion model satisfies the torque balance relationship before the shutdown with the wind condition is switched into control:

[0030] Tw-TL=Jdw / dt, the wind drives the fan to accelerate until Tw equals TL, at which point the fan speed tends to stabilize;

[0031] Before switching control under shutdown headwind conditions, the torque balance relationship must be satisfied:

[0032] Tw = TL + Jdw / dt, the wind drives the fan to reverse and accelerate until Tw equals TL, at which point the fan speed tends to stabilize;

[0033] Where Tw represents the torque generated by wind, TL represents the load torque of the wind turbine, J represents the moment of inertia, and dw / dt represents the acceleration of the wind turbine.

[0034] Secondly, this application provides a wind turbine start-up simulation test system with and without wind. The system includes a memory and a processor. The memory includes a program for a wind turbine start-up simulation test method with and without wind. When the program for the wind turbine start-up simulation test method with and without wind is executed by the processor, the following steps are implemented: controlling the output drive torque of the dynamometer motor according to the set speed, and simulating external wind force information according to the drive torque.

[0035] The load motor is controlled to rotate according to a preset load characteristic curve, and the load torque is output.

[0036] The tested motor is controlled to passively rotate to a balanced speed under the action of the driving torque and the load torque, and the operating status information of the tested motor is acquired in real time.

[0037] Analyze whether the motor under test has reached the preset cutting condition information based on the motion state information of the motor under test;

[0038] If the preset entry conditions are met, the control strategy of the tested motor is activated to control the tested motor to enter either a tailwind or headwind operating condition.

[0039] When the tested motor enters a downwind operating condition, the dynamometer motor is controlled to rotate forward, and the load motor is controlled to output a resistance torque in the opposite direction to the rotation speed. The tested motor outputs electromagnetic torque based on the difference between the target speed and the current speed.

[0040] When the tested motor enters a headwind condition, the dynamometer motor is controlled to reverse, and the load motor is controlled to output a driving torque in the same direction as the rotation speed. After the tested motor outputs braking torque to reduce the speed to zero, it outputs positive driving torque to start the tested motor to the target speed.

[0041] Optionally, in the wind turbine start-up simulation test system described in this application embodiment, the dynamometer motor outputs drive torque according to a set speed, and external wind force information is simulated based on the drive torque, specifically including:

[0042] Based on the correspondence between wind force level and wind turbine input speed, set the set speed of the dynamometer motor corresponding to the target wind force;

[0043] Input the set speed and select the speed closed-loop control mode. The motor speed is stabilized to the set value through PID regulation, and the matching drive torque is output.

[0044] Establish a mapping model between driving torque and external wind force, and convert the driving torque into corresponding external wind force information based on the mapping model.

[0045] Optionally, in the wind turbine start-up simulation test system described in this application embodiment, the tested motor is controlled to passively rotate to a balance speed under the action of the driving torque and the load torque, and the operating status information of the tested motor is acquired in real time, specifically including:

[0046] Obtain the current status information of the motor under test and determine whether the current status information indicates that the motor is in a stopped state;

[0047] If the machine is in a stopped state, start the motor under test and the load motor, control the dynamometer motor to output drive torque and the load motor to output corresponding load torque to act on the motor under test, and drive the motor under test to rotate.

[0048] The speed information of the motor under test is acquired in real time, and it is determined whether the speed information is within the set stable range.

[0049] If the value is within the set stable range, the tested motor is determined to have rotated to the equilibrium speed.

[0050] The operating status information of the tested motor is obtained in real time based on the balanced speed of the tested motor.

[0051] Thirdly, embodiments of this application also provide a computer-readable storage medium, which includes a wind turbine start-up simulation test method program. When the wind turbine start-up simulation test method program is executed by a processor, it implements the steps of the wind turbine start-up simulation test method as described in any of the above claims.

[0052] As can be seen from the above, the wind turbine start-up simulation test method, system, and medium provided in this application embodiment control the output drive torque of the dynamometer motor according to the set speed, and simulate external wind force information according to the drive torque; control the rotation of the load motor according to the preset load characteristic curve, and output load torque; control the tested motor to passively rotate to the equilibrium speed under the action of drive torque and load torque, and acquire the operating status information of the tested motor in real time; analyze whether the tested motor has reached the preset cut-off condition information based on the motion status information of the tested motor; if the preset cut-off condition information is reached, the control strategy of the tested motor is activated, and the tested motor is controlled to switch to the downwind or upwind condition. Operating conditions: When the motor under test enters a downwind operating condition, the dynamometer motor is controlled to rotate forward, and the load motor is controlled to output a resistance torque in the opposite direction of the rotation speed. The motor under test outputs electromagnetic torque based on the difference between the target speed and the current speed. When the motor under test enters a headwind operating condition, the dynamometer motor is controlled to rotate in reverse, and the load motor is controlled to output a driving torque in the same direction as the rotation speed. After the motor under test outputs braking torque to reduce the speed to zero, it outputs forward driving torque to start the motor under test to the target speed. The simulation of downwind and headwind operating conditions can be completed through the dynamometer test bench, which can stably reproduce the two extreme start-up conditions of shutdown with the wind and shutdown with the wind. The entire process is carried out under the closed-loop control of the bench, which improves the testing accuracy and efficiency. Attached Figure Description

[0053] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 A flowchart of the wind turbine start-up simulation test method provided in the embodiments of this application;

[0055] Figure 2 A block diagram of a wind-driven startup and operation simulation system provided in an embodiment of this application;

[0056] Figure 3 A block diagram of a wind-driven startup and operation simulation system provided in an embodiment of this application;

[0057] Figure 4 This is a schematic diagram of the downwind fan speed-load characteristics provided in an embodiment of this application. Detailed Implementation

[0058] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0059] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0060] Please refer to Figures 1-4 This wind turbine start-up simulation test method is used in terminal equipment and includes the following steps:

[0061] S101 controls the output drive torque of the dynamometer motor according to the set speed, and simulates external wind information based on the drive torque.

[0062] S102 controls the rotation of the load motor according to the preset load characteristic curve and outputs the load torque;

[0063] S103 controls the tested motor to passively rotate to the equilibrium speed under the action of drive torque and load torque, and acquires the operating status information of the tested motor in real time.

[0064] S104, Analyze whether the motor under test has reached the preset entry condition information based on the motion state information of the motor under test;

[0065] S105 If the preset entry condition information is met, the control strategy of the tested motor is activated to control the tested motor to enter the downwind or upwind operating condition.

[0066] S106, when the tested motor enters the downwind working condition, the dynamometer motor is controlled to rotate forward, and the load motor is controlled to output a resistance torque in the opposite direction of the rotation speed. The tested motor outputs electromagnetic torque according to the difference between the target speed and the current speed.

[0067] When the tested motor enters a headwind condition, the control dynamometer motor is reversed, and the load motor is controlled to output a driving torque in the same direction as the rotation speed. After the tested motor outputs braking torque to reduce the speed to zero, the positive driving torque is output to start the tested motor to the target speed.

[0068] According to an embodiment of the present invention, the output drive torque of the dynamometer motor is controlled according to a set rotation speed, and external wind force information is simulated based on the drive torque, specifically including:

[0069] Based on the correspondence between wind force level and wind turbine input speed, set the set speed of the dynamometer motor corresponding to the target wind force;

[0070] Input the set speed and select the speed closed-loop control mode. The motor speed is stabilized to the set value through PID regulation, and the matching drive torque is output.

[0071] Establish a mapping model between driving torque and external wind force, and convert the driving torque into corresponding external wind force information based on the mapping model.

[0072] It should be noted that the speed parameter calibration is set as follows:

[0073] Based on the classification of external wind force levels in actual wind turbine operation, the range of wind turbine input speed corresponding to different wind force levels is clearly defined, and a correspondence table of "wind force level - wind turbine input speed" is established. This correspondence needs to be calibrated based on the wind turbine PQ characteristic curve and actual wind tunnel test data to ensure that the speed setting matches the actual wind force scenario.

[0074] Based on the simulation test requirements (tailwind or headwind conditions), determine the target wind force level for this test, extract the wind turbine input speed corresponding to the wind force level from the above correspondence table, and use it as the set speed of the dynamometer motor. The set speed must be controlled within 50% of the rated speed of the motor under test to avoid exceeding the equipment load range.

[0075] The set speed is calibrated with precision. The initial speed of the dynamometer motor is monitored in real time by the speed acquisition module of the dynamometer test bench. The speed control parameters are adjusted to ensure that the fluctuation range of the set speed does not exceed ±1%, thus ensuring the stability of the subsequent drive torque output.

[0076] Dynamometer motor drive torque output control:

[0077] Start the dynamometer motor control system, input the calibrated set speed to the dynamometer motor controller, select the dynamometer motor operating mode as the speed closed-loop control mode, and ensure that the dynamometer motor can stably track the set speed.

[0078] The dynamometer motor controller dynamically outputs drive current based on the difference between the set speed and the real-time speed of the motor through a PID adjustment algorithm, thereby controlling the rotor rotation of the dynamometer motor and gradually adjusting the motor speed to the set speed.

[0079] Once the dynamometer motor reaches the set speed and operates stably, the controller, based on the dynamometer motor's mechanical characteristic curve (speed-torque relationship), controls the motor to output a drive torque that matches the set speed. The magnitude of the drive torque is acquired in real time by a torque sensor to ensure that the torque output error does not exceed ±2%.

[0080] The controller continuously monitors the speed and drive torque of the dynamometer motor. If speed fluctuations or torque deviations occur, the controller adjusts the drive current in real time to maintain stable drive torque and ensure the continuity and stability of simulated wind force.

[0081] Simulation of the mapping between drive torque and external wind information:

[0082] A driving torque-external wind force mapping model is established. Based on the aerodynamic characteristics of the wind turbine and combined with actual test data, the model clarifies the correspondence between driving torque and external wind speed and wind force torque (Tw). That is, the driving torque output by the dynamometer motor is used to reverse map the corresponding external wind speed and wind force effect.

[0083] Once the dynamometer motor outputs a stable driving torque, according to the above mapping model, the driving torque is converted into corresponding external wind force information (including wind speed, wind torque magnitude and direction). Specifically: under downwind conditions, the direction of the driving torque is consistent with the agreed positive rotation direction of the motor under test, simulating the positive thrust of the wind on the fan; under headwind conditions, the direction of the driving torque is opposite to the agreed positive rotation direction of the motor under test, simulating the reverse thrust of the headwind on the fan.

[0084] Real-time synchronization of drive torque and external wind information data feeds back the simulated external wind information to the test system, providing accurate wind parameters to support subsequent load motor torque adjustment, passive rotation control of the tested motor, and cut-in condition judgment.

[0085] If the simulated wind force level needs to be adjusted during the test, the set speed and the driving torque of the dynamometer motor should be recalibrated to achieve accurate simulation of different wind force scenarios.

[0086] Process monitoring and anomaly handling:

[0087] During the test, the dynamometer's operating parameters, such as speed, drive torque, and drive current, are collected in real time through the monitoring module of the dynamometer, while the accuracy of the simulated external wind force information is also monitored.

[0088] If any abnormal situation occurs, such as the dynamometer motor speed deviating from the set value, the drive torque fluctuation exceeding the allowable range, or the wind power simulation information not matching the drive torque, the alarm mechanism will be triggered immediately to stop the dynamometer motor from running and troubleshoot the speed control parameters, torque sensor, drive circuit, and other fault points.

[0089] After troubleshooting, the dynamometer motor was restarted to ensure stable drive torque output and accurate external wind simulation, meeting the requirements of subsequent tailwind and headwind start-up simulation tests.

[0090] According to an embodiment of the present invention, controlling the tested motor to passively rotate to a balance speed under the action of driving torque and load torque, and acquiring the operating status information of the tested motor in real time, specifically includes:

[0091] Obtain the current status information of the motor under test and determine whether the current status information indicates that the motor is in a stopped state;

[0092] If the machine is in a stopped state, start the motor under test and the load motor, control the dynamometer motor to output drive torque and the load motor to output corresponding load torque to act on the motor under test, and drive the motor under test to rotate.

[0093] The speed information of the motor under test is acquired in real time, and it is determined whether the speed information is within the set stable range.

[0094] If the value is within the set stable range, the tested motor is determined to have rotated to the equilibrium speed.

[0095] The operating status information of the tested motor is obtained in real time based on the balanced speed of the tested motor.

[0096] It should be noted that the initial state of the motor under test is confirmed as follows:

[0097] Confirm that the motor under test is in a stopped state, disconnect its active drive control circuit, and ensure that the motor can rotate freely and passively; check the shaft connection status of the motor under test, the dynamometer motor, and the load motor to ensure that the connection is firm and free from jamming, so as to avoid affecting the smoothness of rotation.

[0098] Passive rotary start-up and process control:

[0099] The dynamometer motor and the load motor are started synchronously, so that the dynamometer motor outputs drive torque and the load motor outputs corresponding load torque. The two work together to drive the motor under test to rotate passively. The operating parameters of the dynamometer motor and the load motor are kept stable throughout the process to avoid torque fluctuations that could cause abnormal rotation of the motor under test.

[0100] Balance speed determination:

[0101] The speed of the tested motor is monitored in real time. When the speed tends to stabilize (fluctuation range ≤ ±1%), and the driving torque of the dynamometer motor and the load torque of the load motor reach a balanced state (Te+Tw=TL), it is determined that the tested motor has reached the balanced speed and the continuous speed change phase stops.

[0102] Real-time collection of operational status information:

[0103] Throughout the entire process of the tested motor being passively rotated to its equilibrium speed, the testing system's acquisition module acquires real-time operating status information of the tested motor, including key parameters such as speed, back electromotive force, and shaft torque; ensuring that the acquisition frequency meets the testing requirements, data transmission is stable and without loss, and the acquired data is stored synchronously for backup.

[0104] According to embodiments of the present invention, such as Figure 2 As shown, the shutdown tailwind condition is as follows:

[0105] Based on the analysis results in the table above: Tw is "+", indicating that the drive fan rotates to the positive direction to balance the torque TL at speed n. The magnitude of n depends on the fan's PQ curve;

[0106] The effects of the speed band of a permanent magnet synchronous motor on the speed n:

[0107] The back electromotive force U of the motor will supply DC power.

[0108] The cut-in control varies depending on the rotational speed.

[0109] The motion model is as follows:

[0110] Before putting the system into operation:

[0111] Tw-TL = Jdw / dt;

[0112] The wind drives the fan to rotate, accelerating it; as the rotational speed increases, the fan's load torque TL increases. When the rotational speed reaches n:

[0113] Tw=TL; At this point, the fan stops accelerating. The rotational speed is entirely affected by the wind force; as the wind force increases, the rotational speed continues to rise; as the wind force decreases, the rotational speed drops.

[0114] After being put under control:

[0115] Te + Tw = TL + Jdw / dt;

[0116] As the motor is put into control, it generates electromagnetic torque Te; since the direction of the running speed is consistent with the target, it directly enters the target.

[0117] Cut-in control and its operational impact:

[0118] When the target speed ntarget > the current speed n, the motor under test needs to output positive torque to accelerate (Te>0) until the target speed is reached.

[0119] When the target speed ntarget < the current speed n, the tested motor needs to output negative torque to reduce speed (Te < 0); in this mode, the controller enters a feedback operation state. For products without rectifier control, the machine should be stopped.

[0120] Dynamometer start-up simulation scheme with tailwind:

[0121] Based on the model mentioned above, before control is initiated, there are two torques: Tw and TL, representing the positive drive torque generated by wind power and the wind turbine load torque (drag torque), respectively.

[0122] After the control is engaged, there are three torques: Tw, TL, and Te; compared to before the engagement, the electromagnetic torque Te generated by the tested motor is increased. Depending on the target speed, the electromagnetic torque Te can be either a positive drive torque or a reverse braking torque.

[0123] Considering the varying requirements based on different wind turbines and their tailwind start-up characteristics, the following flexible configuration scheme is adopted:

[0124] It mainly consists of three parts: dynamometer unit, motor under test, and load motor.

[0125] The simulation scheme works as follows:

[0126] Before control is initiated:

[0127] The dynamometer is operating in speed mode. The dynamometer is set to rotate forward, and the output power is limited.

[0128] Controller 2 generates a torque-speed curve based on the PQ characteristic curve to simulate a fan load. Note: The load motor should output resistance torque.

[0129] The dynamometer should be set to a speed less than 50% of its rated speed; the torque capacity of the motor being tested should be greater than or equal to the torque of the load motor.

[0130] After switching to control:

[0131] The tested motor is switched into control, and enters speed mode after stabilization; for the tested fan without PFC, the target speed should be greater than the switch-in speed.

[0132] Shutdown: After the tested motor is controlled to a speed with no input speed, turn off the control tube;

[0133] After the torque of controller 2 drops to 0, the machine is turned off, the dynamometer is set to 0 speed, and the machine stops.

[0134] According to an embodiment of the present invention, the cut-in control logic for tailwind conditions is as follows:

[0135] When the target speed ntarget is greater than the current speed n, the tested motor outputs positive torque acceleration Te>0 until the target speed is reached;

[0136] When the target speed ntarget is less than the current speed n, the measured motor outputs a negative torque deceleration Te<0; the controller enters the feedback operation state.

[0137] According to an embodiment of the present invention, the method for constructing the control strategy of the motor under test is as follows:

[0138] Establish torque balance motion models for cut-in control under tailwind and headwind conditions;

[0139] Based on the torque balance motion model, the simulation conditions for torque and speed are constructed, and a simulation system including the dynamometer motor, the motor under test, the load motor and the corresponding controller is built to obtain the dynamometer test bench.

[0140] Based on the control logic of the dynamometer for both tailwind and headwind conditions, a control strategy is generated.

[0141] According to an embodiment of the present invention, in the motion model, before the control is initiated under the downwind condition, the torque balance relationship is satisfied:

[0142] Tw-TL=Jdw / dt, the wind drives the fan to accelerate until Tw equals TL, at which point the fan speed tends to stabilize;

[0143] Before switching control under shutdown headwind conditions, the torque balance relationship must be satisfied:

[0144] Tw = TL + Jdw / dt, the wind drives the fan to reverse and accelerate until Tw equals TL, at which point the fan speed tends to stabilize;

[0145] Where Tw represents the torque generated by wind power, and TL represents the load torque of the wind turbine.

[0146] According to embodiments of the present invention, such as Figure 3 As shown, the analysis of the shutdown headwind condition is as follows:

[0147] Based on the analysis results of Table 1 (Wind Force-Operating Status Table): Tw is "-", driving the wind turbine to reverse to the balance torque TL at speed -n. The magnitude of n depends on the PQ curve of the wind turbine;

[0148] The effects of the speed band of a permanent magnet synchronous motor on the speed n:

[0149] The back electromotive force U of the motor will supply DC power.

[0150] The system switches to control, and the speed first drops to 0 before restarting.

[0151] Motion model:

[0152] Before putting the system into operation:

[0153] Tw = TL + Jdw / dt;

[0154] The wind drives the fan to rotate, accelerating it; as the rotational speed increases, the fan's load torque TL increases. When the rotational speed reaches n:

[0155] Tw=TL

[0156] At this point, the fan stops accelerating. The rotational speed is entirely affected by the wind force; as the wind force increases, the rotational speed continues to rise; as the wind force decreases, the rotational speed drops.

[0157] After being put under control:

[0158] Te+Tw= TL+ Jdw / dt, as the motor is put into control, the motor generates electromagnetic torque Te.

[0159] Cut-in control and its operational impact:

[0160] The motor needs to enter braking mode first, drag the speed down to 0, and then drive it to rotate in the forward direction.

[0161] The simulation scheme for starting the dynamometer against the wind is as follows:

[0162] Based on the model mentioned above, before control is initiated, there are two torques: Tw and TL; representing the reverse drive torque generated by the wind and the wind turbine load torque (driving torque), respectively.

[0163] After the control is engaged, there are three torques: Tw, TL, and Te; compared with before the engagement, the electromagnetic torque Te generated by the tested motor is increased.

[0164] Considering the varying requirements based on different wind turbines and their tailwind start-up characteristics, the following flexible configuration scheme is adopted:

[0165] It mainly consists of three parts: dynamometer unit, motor under test, and load motor.

[0166] The simulation scheme works as follows:

[0167] Before control is initiated:

[0168] The dynamometer is operating in speed mode;

[0169] The dynamometer is set to reverse to limit the output torque;

[0170] Controller 2 generates a torque-speed curve based on the PQ characteristic curve to simulate a fan load. Note: The load motor should output driving torque.

[0171] The dynamometer should be set to a speed less than 50% of its rated speed; the torque capacity of the motor being tested should be greater than or equal to the torque of the load motor.

[0172] Start after switching control:

[0173] The tested motor is switched to control;

[0174] The output drive torque of the tested motor will drag the motor to 0 speed;

[0175] The tested motor starts and enters speed control mode.

[0176] Shutdown:

[0177] After the tested motor is controlled to a speed at which no speed is required, the control tube is turned off.

[0178] The controller shuts down after the torque drops to 0.

[0179] Set the dynamometer to 0 RPM and stop the machine.

[0180] Table 1 Wind Power - Operating Status Table .

[0181] Secondly, this application provides a wind turbine start-up simulation test system with and without wind. The system includes a memory and a processor. The memory includes a program for a wind turbine start-up simulation test method with and without wind. When the program for the wind turbine start-up simulation test method with and without wind is executed by the processor, the following steps are implemented: controlling the output drive torque of the dynamometer motor according to the set speed, and simulating external wind force information according to the drive torque.

[0182] The load motor is controlled to rotate according to a preset load characteristic curve, and the load torque is output.

[0183] The test motor is controlled to passively rotate to the equilibrium speed under the action of drive torque and load torque, and the operating status information of the test motor is acquired in real time.

[0184] Analyze whether the motor under test has met the preset entry conditions based on the motion state information of the motor under test;

[0185] If the preset entry conditions are met, the control strategy of the tested motor is activated to control the tested motor to enter either tailwind or headwind operation.

[0186] When the tested motor enters a downwind operating condition, the dynamometer motor is controlled to rotate forward, and the load motor is controlled to output a resistance torque in the opposite direction to the rotation speed. The tested motor outputs electromagnetic torque based on the difference between the target speed and the current speed.

[0187] When the tested motor enters a headwind condition, the control dynamometer motor is reversed, and the load motor is controlled to output a driving torque in the same direction as the rotation speed. After the tested motor outputs braking torque to reduce the speed to zero, the positive driving torque is output to start the tested motor to the target speed.

[0188] According to an embodiment of the present invention, the output drive torque of the dynamometer motor is controlled according to a set rotation speed, and external wind force information is simulated based on the drive torque, specifically including:

[0189] Based on the correspondence between wind force level and wind turbine input speed, set the set speed of the dynamometer motor corresponding to the target wind force;

[0190] Input the set speed and select the speed closed-loop control mode. The motor speed is stabilized to the set value through PID regulation, and the matching drive torque is output.

[0191] Establish a mapping model between driving torque and external wind force, and convert the driving torque into corresponding external wind force information based on the mapping model.

[0192] According to an embodiment of the present invention, controlling the tested motor to passively rotate to a balance speed under the action of driving torque and load torque, and acquiring the operating status information of the tested motor in real time, specifically includes:

[0193] Obtain the current status information of the motor under test and determine whether the current status information indicates that the motor is in a stopped state;

[0194] If the machine is in a stopped state, start the motor under test and the load motor, control the dynamometer motor to output drive torque and the load motor to output corresponding load torque to act on the motor under test, and drive the motor under test to rotate.

[0195] The speed information of the motor under test is acquired in real time, and it is determined whether the speed information is within the set stable range.

[0196] If the value is within the set stable range, the tested motor is determined to have rotated to the equilibrium speed.

[0197] The operating status information of the tested motor is obtained in real time based on the balanced speed of the tested motor.

[0198] A third aspect of the present invention provides a computer-readable storage medium including a wind turbine start-up simulation test method program, wherein when the wind turbine start-up simulation test method program is executed by a processor, the wind turbine start-up simulation test method steps as described in any of the above claims are implemented.

[0199] This invention discloses a method, system, and medium for simulating wind turbine start-up in both tailwind and headwind conditions. The method involves controlling the output torque of a dynamometer motor based on a set rotational speed, simulating external wind force based on the driving torque; controlling the rotation of a load motor according to a preset load characteristic curve, outputting load torque; controlling the tested motor to passively rotate to a balanced speed under the action of the driving torque and load torque, and acquiring the tested motor's operating status information in real time; analyzing the tested motor's motion status information to determine if it has reached a preset cut-off condition; if so, activating the tested motor's control strategy to switch to either tailwind or headwind operation; when... When the motor under test enters a downwind condition, the dynamometer motor is controlled to rotate forward, and the load motor is controlled to output a resistance torque in the opposite direction of the rotation speed. The motor under test outputs electromagnetic torque based on the difference between the target speed and the current speed. When the motor under test enters a headwind condition, the dynamometer motor is controlled to rotate in reverse, and the load motor is controlled to output a driving torque in the same direction as the rotation speed. After the motor under test outputs braking torque to reduce the speed to zero, it outputs forward driving torque to start the motor under test to the target speed. The simulation of downwind and headwind conditions can be completed through the dynamometer test bench, which can stably reproduce the two extreme start-up conditions of shutdown with the wind and shutdown with the wind. The entire process is carried out under the closed-loop control of the bench, which improves the accuracy and efficiency of the test.

[0200] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be electrical, mechanical, or other forms.

[0201] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units. They may be located in one place or distributed across multiple network units. Some or all of the units may be selected to achieve the purpose of this embodiment according to actual needs.

[0202] In addition, in the various embodiments of the present invention, each functional unit can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0203] Those skilled in the art will understand that all or part of the steps of the above method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a readable storage medium. When the program is executed, it performs the steps of the above method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0204] Alternatively, if the integrated units of the present invention are implemented as software functional modules and sold or used as independent products, they can also be stored in a readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present invention, or the parts that contribute to the prior art, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, ROM, RAM, magnetic disks, or optical disks.

Claims

1. A method for simulating the start-up of a wind turbine in both forward and reverse wind conditions, characterized in that, include: The dynamometer motor outputs drive torque according to the set speed, and the drive torque is used to simulate external wind force information. The load motor is controlled to rotate according to a preset load characteristic curve, and the load torque is output. The tested motor is controlled to passively rotate to a balanced speed under the action of the driving torque and the load torque, and the operating status information of the tested motor is acquired in real time. Analyze whether the motor under test has reached the preset cutting condition information based on the motion state information of the motor under test; If the preset entry conditions are met, the control strategy of the tested motor is activated to control the tested motor to enter either a tailwind or headwind operating condition. When the tested motor enters a downwind operating condition, the dynamometer motor is controlled to rotate forward, and the load motor is controlled to output a resistance torque in the opposite direction to the rotation speed. The tested motor outputs electromagnetic torque based on the difference between the target speed and the current speed. When the tested motor enters a headwind condition, the dynamometer motor is controlled to reverse, and the load motor is controlled to output a driving torque in the same direction as the rotation speed. After the tested motor outputs braking torque to reduce the speed to zero, it outputs positive driving torque to start the tested motor to the target speed.

2. The wind turbine start-up simulation test method according to claim 1, characterized in that, The dynamometer motor outputs drive torque based on a set rotational speed, and simulates external wind force information based on this drive torque. Specifically, this includes: Based on the correspondence between wind force level and wind turbine input speed, set the set speed of the dynamometer motor corresponding to the target wind force; Input the set speed and select the speed closed-loop control mode. The motor speed is stabilized to the set value through PID regulation, and the matching drive torque is output. Establish a mapping model between driving torque and external wind force, and convert the driving torque into corresponding external wind force information based on the mapping model.

3. The wind turbine start-up simulation test method according to claim 2, characterized in that, The tested motor is controlled to passively rotate to a balanced speed under the action of the driving torque and the load torque, and the operating status information of the tested motor is acquired in real time, specifically including: Obtain the current status information of the motor under test and determine whether the current status information indicates that the motor is in a stopped state; If the machine is in a stopped state, start the motor under test and the load motor, control the dynamometer motor to output drive torque and the load motor to output corresponding load torque to act on the motor under test, and drive the motor under test to rotate. The speed information of the motor under test is acquired in real time, and it is determined whether the speed information is within the set stable range. If the value is within the set stable range, the tested motor is determined to have rotated to the equilibrium speed. The operating status information of the tested motor is obtained in real time based on the balanced speed of the tested motor.

4. The wind turbine start-up simulation test method according to claim 3, characterized in that, The control logic for entering the tailwind mode is as follows: When the target speed ntarget is greater than the current speed n, the tested motor outputs positive torque acceleration Te>0 until the target speed is reached; When the target speed ntarget is less than the current speed n, the measured motor outputs a negative torque deceleration Te<0; The controller enters the feedback operation state.

5. The wind turbine start-up simulation test method according to claim 4, characterized in that, The method for constructing the control strategy for the motor under test is as follows: Establish torque balance motion models for cut-in control under tailwind and headwind conditions; Based on the torque balance motion model, the simulation conditions for torque and speed are constructed, and a simulation system including the dynamometer motor, the motor under test, the load motor and the corresponding controller is built to obtain the dynamometer test bench. Based on the control logic of the dynamometer for both tailwind and headwind conditions, a control strategy is generated.

6. The wind turbine start-up simulation test method according to claim 5, characterized in that, In the aforementioned motion model, before the control is initiated under the downwind operating condition, the torque balance relationship is satisfied: Tw-TL=Jdw / dt, the wind drives the fan to accelerate until Tw equals TL, at which point the fan speed tends to stabilize; Before switching control under shutdown headwind conditions, the torque balance relationship must be satisfied: Tw = TL + Jdw / dt, the wind drives the fan to reverse and accelerate until Tw equals TL, at which point the fan speed tends to stabilize; Where Tw represents the torque generated by wind, TL represents the load torque of the wind turbine, J represents the moment of inertia, and dw / dt represents the acceleration of the wind turbine.

7. A wind turbine start-up simulation test system with and against wind direction, characterized in that, The system includes a memory and a processor. The memory contains a program for a wind turbine start-up simulation test method with and without wind. When the processor executes the program for the wind turbine start-up simulation test method with and without wind, it performs the following steps: The dynamometer motor outputs drive torque according to the set speed, and the drive torque is used to simulate external wind force information. The load motor is controlled to rotate according to a preset load characteristic curve, and the load torque is output. The tested motor is controlled to passively rotate to a balanced speed under the action of the driving torque and the load torque, and the operating status information of the tested motor is acquired in real time. Based on the motion state information of the tested motor, analyze whether the tested motor has reached the preset cutting-in condition information. If the preset entry conditions are met, the control strategy of the tested motor is activated to control the tested motor to enter either a tailwind or headwind operating condition. When the tested motor enters a downwind operating condition, the dynamometer motor is controlled to rotate forward, and the load motor is controlled to output a resistance torque in the opposite direction to the rotation speed. The tested motor outputs electromagnetic torque based on the difference between the target speed and the current speed. When the tested motor enters a headwind condition, the dynamometer motor is controlled to reverse, and the load motor is controlled to output a driving torque in the same direction as the rotation speed. After the tested motor outputs braking torque to reduce the speed to zero, it outputs positive driving torque to start the tested motor to the target speed.

8. The wind turbine start-up simulation test system according to claim 7, characterized in that, The dynamometer motor outputs drive torque based on a set rotational speed, and simulates external wind force information based on this drive torque. Specifically, this includes: Based on the correspondence between wind force level and wind turbine input speed, set the set speed of the dynamometer motor corresponding to the target wind force; Input the set speed and select the speed closed-loop control mode. The motor speed is stabilized to the set value through PID regulation, and the matching drive torque is output. Establish a mapping model between driving torque and external wind force, and convert the driving torque into corresponding external wind force information based on the mapping model.

9. The wind turbine start-up simulation test system according to claim 8, characterized in that, The tested motor is controlled to passively rotate to a balanced speed under the action of the driving torque and the load torque, and the operating status information of the tested motor is acquired in real time, specifically including: Obtain the current status information of the motor under test and determine whether the current status information indicates that the motor is in a stopped state; If the machine is in a stopped state, start the motor under test and the load motor, control the dynamometer motor to output drive torque and the load motor to output corresponding load torque to act on the motor under test, and drive the motor under test to rotate. The speed information of the motor under test is acquired in real time, and it is determined whether the speed information is within the set stable range. If the value is within the set stable range, the tested motor is determined to have rotated to the equilibrium speed. The operating status information of the tested motor is obtained in real time based on the balanced speed of the tested motor.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a wind turbine start-up simulation test method program, which, when executed by a processor, implements the steps of the wind turbine start-up simulation test method as described in any one of claims 1 to 6.

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