Simulation test method and system for variable pitch system of wind turbine generator

Abstract

The invention discloses a simulation test method and system for a variable pitch system of a wind turbine generator, and the method comprises the steps: obtaining a wind field operation data time sequence file which comprises torque data and variable pitch data which are correlated with each other, and the torque data and the variable pitch data are sorted according to the sampling time; and based on the wind field operation data time sequence file, sending a moment loading control instruction to a loading system and sending a variable pitch control instruction to a tested variable pitch product at the same time. The system comprises a main control system, a loading system, a tested variable pitch product and a variable pitch transmission chain. When the variable pitch system is subjected to simulation test, the fan operation condition can be simulated on the ground according to the blade load and the angle change time sequence, the synchronous irregular change of the loading torque and the variable pitch angle is realized, and the authenticity of the simulation test can be ensured; and reliable test data can be provided for fan fault research, fan performance optimization research and the like.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and specifically to a simulation test method and system for a wind turbine pitch system. Background Technology

[0002] Currently, pitch control system testing systems typically consist of a loading system, the pitch product under test (DUT), and a simulation controller. The loading system comprises a host computer operating system, a loading PLC, a loading driver, and a loading motor. The host computer operating system provides the interface for issuing commands, the loading PLC receives input from the operating system and runs the program, the loading driver receives commands from the loading PLC and outputs voltage and current, and the loading motor converts the voltage and current input into output torque to simulate wind load. The DUT consists of a pitch driver and a pitch motor. The simulation controller consists of a simulation controller operating system and a simulation controller PLC. The loading system can typically achieve a set torque output form through the host computer operating system, such as constant torque, sinusoidal torque, triangular wave torque, or square wave torque. The DUT operates according to a set blade angle or speed by receiving commands from the simulation controller. In this type of pitch test system, the loading torque and pitch angle are controlled separately, making synchronous and irregular changes impossible, and it cannot simulate the transmission chain of a real pitch mechanism. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a simulation test method and system for wind turbine pitch system. When simulating the pitch system, the method can simulate the wind turbine operating conditions on the ground according to the timing of blade load and angle changes, realize the synchronous and irregular changes of loading torque and pitch angle, thereby ensuring the authenticity of the simulation test and providing reliable test data for wind turbine fault research, wind turbine performance optimization research, etc.

[0004] A simulation test method for a wind turbine pitch system according to the present invention includes: Obtain a wind farm operation data time series file, which includes interrelated torque data and pitch data, both of which are sorted by sampling time. Based on the wind farm operation data timeline file, torque loading control commands are simultaneously sent to the loading system and pitch control commands are sent to the pitch product under test.

[0005] Furthermore, it also includes: Obtain the actual test run data time sequence file, which includes the actual torque loading data fed back by the loading system and the actual pitch data fed back by the pitch product under test. The actual torque loading data and the actual pitch data are sorted according to the feedback time. Based on the actual test operation data time series file, determine whether the wind farm operation data time series file needs to be optimized.

[0006] Furthermore, determining whether the wind farm operation data time series file needs to be optimized based on the actual test operation data time series file includes: The actual test data time series file is compared and analyzed with the wind farm operation data time series file to determine whether the degree of distortion of the simulation test meets the requirements. If it does, there is no need to optimize the wind farm operation data time series file. If it does not, the wind farm operation data time series file is updated to extend the time interval between two adjacent sampling time points.

[0007] Furthermore, the wind farm operation data time series file is wind farm operation data collected on-site or simulation load data.

[0008] Furthermore, the pitch data is blade angle data or blade speed data, and the pitch control command is a blade angle control command or a blade speed control command.

[0009] The present invention provides a wind turbine pitch system simulation test system for implementing the aforementioned wind turbine pitch system simulation test method. The wind turbine pitch system simulation test system includes: The main control system is configured to: acquire a wind farm operation data time series file, the wind farm operation data time series file including interrelated torque data and pitch data, the torque data and the pitch data being sorted according to the sampling time; and based on the wind farm operation data time series file, simultaneously send a torque loading control command to the loading system and a pitch control command to the pitch product under test. A loading system includes a loading driver and a loading motor. The loading driver is used to receive the torque loading control command and control the loading motor to work based on the torque loading control command. The pitch product under test includes a pitch driver and a pitch motor. The pitch driver is used to receive the pitch control command and control the pitch motor to work based on the pitch control command. And a pitch drive chain, which is connected to the loading motor and the pitch motor.

[0010] Furthermore, the pitch drive train includes a loading gearbox, a pitch gearbox, a pitch bearing, and a hub. The loading motor, loading gearbox, and pitch bearing are sequentially connected in a driving relationship. The pitch motor, pitch gearbox, and pitch bearing are sequentially connected in a driving relationship. The pitch bearing is mounted on the hub.

[0011] Furthermore, the main control system includes an input control module, a load control module, and a pitch control module. The input control module is used to acquire wind farm operation data timing files and, based on these files, simultaneously send torque data to the load control module and pitch control data to the pitch control module. The load control module is used to send torque loading control commands to the load driver based on the torque data. The pitch control module is used to send pitch control commands to the pitch driver based on the pitch data.

[0012] Furthermore, the main control system also includes a data feedback module, which is configured to: acquire an actual test operation data timing file, the actual test operation data timing file including interrelated actual torque loading data fed back by the loading system and actual pitch data fed back by the pitch product under test, the actual torque loading data and the actual pitch data being sorted by feedback time; and based on the actual test operation data timing file, determine whether the wind farm operation data timing file needs to be optimized.

[0013] Furthermore, determining whether the wind farm operation data time series file needs to be optimized based on the actual test operation data time series file includes: The actual test data time series file is compared and analyzed with the wind farm operation data time series file to determine whether the degree of distortion of the simulation test meets the requirements. If it does, there is no need to optimize the wind farm operation data time series file. If it does not, the wind farm operation data time series file is updated to extend the time interval between two adjacent sampling time points.

[0014] Furthermore, the wind farm operation data time series file is wind farm operation data collected on-site or simulated load data; the pitch data is blade angle data or blade speed data, and the pitch control command is blade angle control command or blade speed control command.

[0015] The beneficial effects of this invention are: (1) After parsing the wind farm operation data timing file, the main control system of the present invention synchronously sends torque loading control commands to the loading system and pitch control commands to the pitch product under test, so that the loading system controls the loading motor to work according to the torque change of the wind farm operation data collected on site, and the pitch product under test controls the pitch motor to work according to the blade angle of the wind farm operation data collected on site. Thus, when the pitch system is simulated for testing, the wind turbine operation conditions can be simulated on the ground according to the timing of blade load and angle changes, and the loading torque and pitch angle can be synchronously and irregularly changed, thereby ensuring the authenticity of the simulation test and providing reliable test data for wind turbine fault research, wind turbine performance optimization research, etc.

[0016] (2) The pitch transmission chain of the present invention includes a loading gearbox, a pitch gearbox, a pitch bearing and a hub, which can simulate the transmission chain of a real pitch mechanism. Attached Figure Description

[0017] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration: Figure 1 This is a flowchart illustrating the simulation test method for the wind turbine pitch system of the present invention. Figure 2 This is an example diagram of wind farm operation data collected in the field according to the present invention; Figure 3 This is an architecture diagram of the wind turbine pitch system simulation test system of the present invention (single pitch motor). Figure 4 This is an architecture diagram of the wind turbine pitch system simulation test system (dual pitch motor) of the present invention. Figure 5 This is a control principle diagram of the wind turbine pitch system simulation test system of the present invention. Detailed Implementation

[0018] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0019] Example 1: like Figure 1 As shown in this embodiment, a simulation test method for a wind turbine pitch system includes the following steps: S1. Obtain the wind farm operation data time series file, which includes interrelated torque data and pitch data, and the torque data and pitch data are sorted according to the sampling time. The pitch data refers to either blade angle data or blade velocity data. When used for simulation tests involving synchronous, irregular changes in applied torque and blade angle, the pitch data is blade angle data; when used for simulation tests involving synchronous, irregular changes in applied torque and blade velocity, the pitch data is blade velocity data. This embodiment uses blade angle data as an example for illustration.

[0020] In this step, the wind farm operation data time series file is either field-collected wind farm operation data or simulation load data. An example of field-collected wind farm operation data is shown below. Figure 2 As shown, Figure 2 The left vertical axis represents the torque data, in N·m. In this example, all torque data are positive. The torque data collected in the field may be positive or negative. When the torque data is positive, the loading motor is controlled to rotate forward; when the torque data is negative, the loading motor is controlled to rotate in reverse. Figure 2The vertical axis on the right represents the blade angle, in degrees. Figure 2 The horizontal axis represents the sampling time point, with an interval of 10ms between two adjacent sampling time points. Figure 2 It can be seen that the torque data and blade angle of the wind farm operation data collected on site change synchronously and irregularly.

[0021] Wind farm operation data is obtained through on-site collection or by using simulated load data. A time series file of wind farm operation data in TXD or CSV format is generated and then input to the input control module of the main control system via data transmission.

[0022] S2. Based on the wind farm operation data timing file, simultaneously send torque loading control commands to the loading system and pitch control commands to the pitch product under test.

[0023] Traditional technical solutions control the loading torque and pitch angle separately during simulation testing. Furthermore, the loading torque is set as a preset value, using sine waves, triangle waves, square waves, etc., which significantly differs from actual wind farm operating data, failing to guarantee the realism of the simulation test. In this embodiment, the main control system parses the wind farm operating data timing file and simultaneously sends torque loading control commands to the loading system and pitch control commands to the pitch control product under test. This allows the loading system to control the loading motor according to the torque changes in the actual wind farm operating data, and the pitch control product to control the pitch motor according to the blade angle changes in the actual wind farm operating data. This enables the simulation testing of the pitch system to simulate wind turbine operating conditions on the ground according to the timing of blade load and angle changes, achieving synchronous and irregular changes in loading torque and pitch angle. This ensures the realism of the simulation test and provides reliable experimental data for wind turbine fault research and performance optimization studies.

[0024] S3. Obtain the actual test operation data timing file, which includes the actual torque loading data fed back by the loading system and the actual pitch data fed back by the pitch product under test. The actual torque loading data and the actual pitch data are sorted according to the feedback time.

[0025] Both the loading system and the pitch product under test are equipped with corresponding sensors, such as torque sensors and position sensors, to collect the torque output by the loading motor and the angle control output by the pitch motor, and then output the collected information to the data feedback module.

[0026] S4. Based on the actual test operation data time series file, determine whether the wind farm operation data time series file needs to be optimized. This step includes: comparing and analyzing the actual test operation data time series file with the wind farm operation data time series file to determine whether the degree of simulation test distortion meets the requirements; if it does, then the wind farm operation data time series file does not need to be optimized; if it does not, then the wind farm operation data time series file is updated, and the time interval between two adjacent sampling time points is extended.

[0027] Since the process of parsing, sending, responding, and outputting takes a certain amount of time, and the change in motor output torque or angle is also a process, the actual torque loading data and actual pitch data may differ from the torque data and pitch data in the wind farm operation data timing file.

[0028] After comparing and analyzing the actual test data time series file with the wind farm operation data time series file, if the simulation test distortion level does not meet the requirements, it is considered that the sampling time interval of the wind farm operation data time series file is too short, and the change frequency of torque data and pitch data is too fast. This results in the load driver, load motor, pitch driver, and pitch motor being unable to respond promptly and accurately, leading to poor simulation test performance. In this case, the time interval between two adjacent sampling time points can be extended to reduce the change frequency of torque data and pitch data, thereby achieving a balance between high sampling accuracy and distortion-free simulation testing. Initially, the time interval between two adjacent sampling time points is 10ms. If the simulation test distortion level does not meet the requirements, the time interval will be increased by 5ms or 10ms.

[0029] When determining the degree of distortion in the simulation test, firstly, the torque data in the wind farm operation data time series file at each sampling time point is subtracted from the actual torque loading data in the corresponding actual test operation data time series file, and the absolute value is taken. The mean of the absolute values ​​is then calculated to see if it exceeds a preset torque difference threshold. If it does, the degree of distortion in the simulation test is considered unacceptable. Next, the blade angle data in the wind farm operation data time series file at each sampling time point is subtracted from the actual blade angle data in the corresponding actual test operation data time series file, and the absolute value is taken. The mean of the absolute values ​​is then calculated to see if it exceeds a preset angle difference threshold. If it does, the degree of distortion in the simulation test is considered unacceptable. Only when the differences in the absolute values ​​of torque and blade angle both meet the threshold is the degree of distortion in the simulation test considered acceptable.

[0030] To reduce system response time and ensure the accuracy of simulation testing, the main control system, loading system, and the pitch product under test in this embodiment all adopt the CAN protocol to shorten the communication cycle. Furthermore, the main control system communicates directly with the loading driver, without any other controllers or processors between them, and the main control system also communicates directly with the pitch driver, without any other controllers or processors between them, further shortening the communication cycle and reducing system response time, thus ensuring the accuracy of the simulation testing.

[0031] Example 2: like Figures 3-5 As shown, this embodiment provides a wind turbine pitch system simulation test system for implementing the wind turbine pitch system simulation test method in Embodiment 1. The wind turbine pitch system simulation test system includes: The main control system is configured to: acquire a wind farm operation data time series file, the wind farm operation data time series file including interrelated torque data and pitch data, the torque data and the pitch data being sorted according to the sampling time; and based on the wind farm operation data time series file, simultaneously send a torque loading control command to the loading system and a pitch control command to the pitch product under test. The loading system includes a loading driver and a loading motor. The loading driver receives the torque loading control command and controls the loading motor to work based on the torque loading control command. The loading motor can rotate forward or reverse. When the torque data is positive, the loading motor is controlled to rotate forward, and when the torque data is negative, the loading motor is controlled to rotate in reverse. The pitch control product under test includes a pitch driver and a pitch motor. The pitch driver receives the pitch control commands and controls the pitch motor to operate based on the pitch control commands. Figure 3 As shown, there can be one pitch motor, such as... Figure 4 As shown, there can be two pitch motors; And a pitch drive chain, which is connected to the loading motor and the pitch motor.

[0032] The pitch data refers to either blade angle data or blade velocity data. When used for simulation tests involving synchronous, irregular changes in applied torque and blade angle, the pitch data is blade angle data; when used for simulation tests involving synchronous, irregular changes in applied torque and blade velocity, the pitch data is blade velocity data. This embodiment uses blade angle data as an example for illustration.

[0033] In this step, the wind farm operation data time series file is either field-collected wind farm operation data or simulation load data. An example of field-collected wind farm operation data is shown below. Figure 3 As shown, Figure 3The left vertical axis represents the torque data, in N·m. In this example, all torque data are positive. The torque data collected in the field may be positive or negative. When the torque data is positive, the loading motor is controlled to rotate forward; when the torque data is negative, the loading motor is controlled to rotate in reverse. Figure 3 The vertical axis on the right represents the blade angle, in degrees. Figure 3 The horizontal axis represents the sampling time point, with an interval of 10ms between two adjacent sampling time points. Figure 3 It can be seen that the torque data and blade angle of the wind farm operation data collected on site change synchronously and irregularly.

[0034] Wind farm operation data is obtained through on-site collection or by using simulated load data. A time series file of wind farm operation data in TXD or CSV format is generated and then input to the input control module of the main control system via data transmission.

[0035] Traditional technical solutions control the loading torque and pitch angle separately during simulation testing. Furthermore, the loading torque is set as a preset value, using sine waves, triangle waves, square waves, etc., which significantly differs from actual wind farm operating data, failing to guarantee the realism of the simulation test. In this embodiment, the main control system parses the wind farm operating data timing file and simultaneously sends torque loading control commands to the loading system and pitch control commands to the pitch control product under test. This allows the loading system to control the loading motor according to the torque changes in the actual wind farm operating data, and the pitch control product to control the pitch motor according to the blade angle changes in the actual wind farm operating data. This enables the simulation testing of the pitch system to simulate wind turbine operating conditions on the ground according to the timing of blade load and angle changes, achieving synchronous and irregular changes in loading torque and pitch angle. This ensures the realism of the simulation test and provides reliable experimental data for wind turbine fault research and performance optimization studies.

[0036] To reduce system response time and ensure the accuracy of simulation testing, the main control system, loading system, and the pitch product under test in this embodiment all adopt the CAN protocol to shorten the communication cycle. Furthermore, the main control system communicates directly with the loading driver, without any other controllers or processors between them, and the main control system also communicates directly with the pitch driver, without any other controllers or processors between them, further shortening the communication cycle and reducing system response time, thus ensuring the accuracy of the simulation testing.

[0037] In this embodiment, the pitch drive train includes a loading gearbox, a pitch gearbox, a pitch bearing, and a hub. The loading motor, loading gearbox, and pitch bearing are sequentially connected in a driving transmission manner. The pitch motor, pitch gearbox, and pitch bearing are sequentially connected in a driving transmission manner. The pitch bearing is mounted on the hub.

[0038] The pitch drive train can simulate the drive train of a real pitch mechanism.

[0039] The loading gearbox and pitch gearbox are both fixed to the hub via a fixture bracket. The pitch bearing is mounted on the hub. The pitch motor under test is connected to the pitch gearbox, and the pitch gearbox and pitch bearing are meshed via gears. The loading motor is connected to the loading gearbox, and the loading gearbox and pitch bearing are meshed via gears. The loading motor simulates the load of the wind turbine blades on the pitch bearing through the loading gearbox. The pitch motor drives the pitch bearing to move through the pitch gearbox and overcomes the load.

[0040] In this embodiment, the main control system includes an input control module, a load control module, and a pitch control module. The input control module is used to acquire wind farm operation data timing files and, based on the wind farm operation data timing files, simultaneously send torque data to the load control module and pitch control data to the pitch control module. The load control module is used to send torque loading control commands to the load driver based on the torque data. The pitch control module is used to send pitch control commands to the pitch driver based on the pitch data.

[0041] In this embodiment, the main control system further includes a data feedback module, which is configured to: acquire an actual test operation data timing file, the actual test operation data timing file including interrelated actual torque loading data fed back by the loading system and actual pitch data fed back by the pitch product under test, both the actual torque loading data and the actual pitch data being sorted by feedback time; and based on the actual test operation data timing file, determine whether the wind farm operation data timing file needs to be optimized. The data feedback module can also be used for data recording, storing the feedback data.

[0042] In this embodiment, determining whether the wind farm operation data time series file needs to be optimized based on the actual test operation data time series file includes: The actual test data time series file is compared and analyzed with the wind farm operation data time series file to determine whether the degree of distortion of the simulation test meets the requirements. If it does, there is no need to optimize the wind farm operation data time series file. If it does not, the wind farm operation data time series file is updated to extend the time interval between two adjacent sampling time points.

[0043] In this embodiment, the wind farm operation data time series file is wind farm operation data collected in the field or simulated load data; the pitch data is blade angle data or blade speed data, and the pitch control command is blade angle control command or blade speed control command.

[0044] In this embodiment, both the loading system and the pitch product under test are equipped with corresponding sensors, such as torque sensors and position sensors, to collect the torque output by the loading motor and the angle control output by the pitch motor, and then output the collected information to the data feedback module.

[0045] The loading system and the pitch product under test are also equipped with temperature sensors and fault detection devices to collect temperature and fault information of the loading system and the pitch product under test, and send the temperature and fault information to the data feedback module so that the data feedback module can determine whether the loading system and the pitch product under test are at risk of high temperature or have a fault.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A simulation test method for a wind turbine pitch system, characterized in that, include: Obtain a wind farm operation data time series file, which includes interrelated torque data and pitch data, both of which are sorted by sampling time. Based on the wind farm operation data timeline file, torque loading control commands are simultaneously sent to the loading system and pitch control commands are sent to the pitch product under test.

2. The simulation test method for wind turbine pitch system according to claim 1, characterized in that, Also includes: Obtain the actual test run data time sequence file, which includes the actual torque loading data fed back by the loading system and the actual pitch data fed back by the pitch product under test. The actual torque loading data and the actual pitch data are sorted according to the feedback time. Based on the actual test operation data time series file, determine whether the wind farm operation data time series file needs to be optimized.

3. The simulation test method for wind turbine pitch system according to claim 2, characterized in that, The step of determining whether the wind farm operation data time series file needs to be optimized based on the actual test operation data time series file includes: The actual test data time series file is compared and analyzed with the wind farm operation data time series file to determine whether the degree of distortion of the simulation test meets the requirements. If it does, there is no need to optimize the wind farm operation data time series file. If it does not, the wind farm operation data time series file is updated to extend the time interval between two adjacent sampling time points.

4. The simulation test method for wind turbine pitch system according to claim 1, characterized in that: The wind farm operation data time series file consists of wind farm operation data collected on-site or simulation load data.

5. The simulation test method for wind turbine pitch system according to claim 1, characterized in that: The pitch data is blade angle data or blade speed data, and the pitch control command is a blade angle control command or a blade speed control command.

6. A simulation test system for a wind turbine pitch system, characterized in that, For implementing the wind turbine pitch system simulation test method as described in any one of claims 1-5, the wind turbine pitch system simulation test system comprises: The main control system is configured to: acquire a wind farm operation data time series file, the wind farm operation data time series file including interrelated torque data and pitch data, the torque data and the pitch data being sorted according to the sampling time; and based on the wind farm operation data time series file, simultaneously send a torque loading control command to the loading system and a pitch control command to the pitch product under test. A loading system includes a loading driver and a loading motor. The loading driver is used to receive the torque loading control command and control the loading motor to work based on the torque loading control command. The pitch product under test includes a pitch driver and a pitch motor. The pitch driver is used to receive the pitch control command and control the pitch motor to work based on the pitch control command. And a pitch drive chain, which is connected to the loading motor and the pitch motor.

7. The wind turbine pitch system simulation test system according to claim 6, characterized in that: The pitch drivetrain includes a loading gearbox, a pitch gearbox, a pitch bearing, and a hub. The loading motor, loading gearbox, and pitch bearing are sequentially connected in a driving relationship. The pitch motor, pitch gearbox, and pitch bearing are sequentially connected in a driving relationship. The pitch bearing is mounted on the hub.

8. The wind turbine pitch system simulation test system according to claim 6, characterized in that: The main control system includes an input control module, a load control module, and a pitch control module. The input control module acquires wind farm operation data timing files and, based on these files, simultaneously sends torque data to the load control module and pitch control data to the pitch control module. The load control module sends torque loading control commands to the load driver based on the torque data. The pitch control module sends pitch control commands to the pitch driver based on the pitch data.

9. The wind turbine pitch system simulation test system according to claim 8, characterized in that: The main control system also includes a data feedback module, which is configured to: acquire actual test operation data timing file, the actual test operation data timing file includes actual torque loading data fed back by the loading system and actual pitch data fed back by the pitch product under test, and the actual torque loading data and the actual pitch data are sorted according to the feedback time. The actual test data time series file is compared and analyzed with the wind farm operation data time series file to determine whether the degree of distortion of the simulation test meets the requirements. If it does, there is no need to optimize the wind farm operation data time series file. If it does not, the wind farm operation data time series file is updated to extend the time interval between two adjacent sampling time points.

10. The wind turbine pitch system simulation test system according to claim 6, characterized in that: The wind farm operation data time series file is wind farm operation data collected on-site or simulated load data; the pitch data is blade angle data or blade speed data, and the pitch control command is blade angle control command or blade speed control command.

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