A wind turbine variable pitch system identification test method, device and storage medium

Abstract

The present application relates to the technical field of wind turbine, especially refers to a wind turbine variable pitch system identification test method, device, equipment and computer storage medium. The wind turbine variable pitch system identification test method provided by the present application only needs to set part of parameters in the evaluation process, and the subsequent test system is automatically completed according to the set test evaluation steps, so that the dispersion of the variable pitch system identification test process is reduced, the automation level of the test process is improved, the professional requirement of the implementation personnel for the test work is reduced, and the work efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of wind turbine technology, and in particular to a method, apparatus, equipment, and computer storage medium for identifying and testing the pitch system of a wind turbine. Background Technology

[0002] For variable pitch wind turbines, pitch regulation is used to stabilize the rotor speed. In controller design and load simulation calculations, wind turbine manufacturers consider the performance of the pitch system to directly impact the safety margin of the wind turbine, thus affecting the overall construction and operating costs. Companies using wind turbines for power generation monitor the performance of the pitch system over long-term operation to ensure it meets design requirements and to identify any significant performance degradation. Failure to meet design requirements or performance degradation can lead to decreased operational stability, reduced turbine availability, and power generation losses. Therefore, the performance of the pitch system is crucial in both the design and operation phases of wind turbines, making system identification and performance evaluation of the pitch system essential.

[0003] Pitch system identification is typically conducted during wind turbine prototype testing. It requires specialized testing personnel to complete the process step-by-step according to a test outline. Much of the work is done manually, and the outputs are scattered. After on-site testing, the data needs to be compiled and analyzed by professionals to ultimately produce a pitch system identification report. The entire pitch system identification process is time-consuming, labor-intensive, and relatively inefficient. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the entire process of pitch system identification in the prior art is time-consuming, labor-intensive, and relatively inefficient.

[0005] To address the aforementioned technical problems, this invention provides a method for identifying and testing the pitch system of a wind turbine, comprising:

[0006] Set the sine test parameters, step test parameters, and pitch system transfer model;

[0007] Real-time acquisition of data timestamps, blade pitch angle requirements, measured blade pitch angle values, and measured blade pitch angular rate values;

[0008] The pitch control command for the test phase is set to add an offset to the blade pitch angle requirement, and the pitch test is performed according to the test outline process based on the pitch control command.

[0009] The data from the testing phase is input into the pitch system to pass the model fitting parameters, and the pitch system identification results are obtained.

[0010] Preferably, the sine test parameters include the sine amplitude and period, and the step test parameters include the step change amplitude.

[0011] Preferably, the transfer model of the pitch system is a first-order or second-order transfer function.

[0012] Preferably, the sampling period for the real-time data acquisition timestamp, blade pitch angle requirement, measured blade pitch angle, and measured blade pitch angular rate is the minimum execution period of the control system.

[0013] Preferably, the pitch control command for the test phase is to add an offset to the blade pitch angle requirement, and the pitch test is performed according to the test outline process based on the pitch control command, including:

[0014] Step a: Set the initial offset of the blade pitch angle. When the current measured value of the blade pitch angle reaches the sum of the initial offset of the blade pitch angle and the required blade pitch angle and remains stable, update the blade pitch angle offset according to the sinusoidal variation parameter.

[0015] Step b: When the measured value of the current blade pitch angle reaches the sum of the initial blade pitch angle offset, the required blade pitch angle, and the current blade pitch angle offset, and remains stable, stop the sine test of this wheel.

[0016] Step c: Repeat the test process of steps a and b multiple times for the current set of parameters;

[0017] Step d: Adjust the parameters multiple times, and repeat the test process of step ac after each adjustment to complete all sine tests.

[0018] Preferably, after completing all sine tests, the method further includes:

[0019] Step e: Update the blade pitch angle offset according to the step change parameters;

[0020] Step f: When the measured value of the current blade pitch angle reaches the sum of the initial offset of the blade pitch angle, the required blade pitch angle, and the current offset of the blade pitch angle, and remains stable, stop the wheel step test;

[0021] Step g: Repeat the test process of step ef multiple times for the current set of parameters;

[0022] Step h: Adjust the parameters multiple times, and repeat the test process in step eg after each adjustment to complete all step tests.

[0023] Preferably, after inputting the test phase data into the pitch system transfer model fitting parameters to obtain the pitch system identification result, the method further includes:

[0024] The deviation between the pitch system identification results and the pitch system design parameters is calculated to obtain a pitch system identification and analysis report.

[0025] The present invention also provides a wind turbine pitch system identification and testing device, comprising:

[0026] The parameter definition module is used to set the sine test parameters, step test parameters, and pitch system transfer model;

[0027] The data recording module is used to collect data timestamps, blade pitch angle requirements, measured blade pitch angle values, and measured blade pitch angular rate values ​​in real time.

[0028] The pitch test module is used to set the pitch control command during the test phase to add an offset to the blade pitch angle requirement, and to perform pitch test according to the test outline process based on the pitch control command.

[0029] The system identification module is used to input the data from the testing phase into the pitch system to pass model fitting parameters and obtain the pitch system identification results.

[0030] The present invention also provides a wind turbine pitch system identification and testing device, comprising:

[0031] Memory, used to store computer programs;

[0032] A processor is used to implement the steps of the above-described wind turbine pitch system identification and testing method when executing the computer program.

[0033] The present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the above-described wind turbine pitch system identification and testing method.

[0034] The technical solution of the present invention has the following advantages compared with the prior art:

[0035] The wind turbine pitch system identification and testing method described in this invention only requires setting some parameters during the evaluation process. The subsequent testing and evaluation steps are automatically completed by the testing system, which reduces the dispersion of the pitch system identification and testing process, improves the automation level of the testing process, reduces the professional requirements of the personnel implementing the testing work, and improves work efficiency. Attached Figure Description

[0036] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0037] Figure 1This is a flowchart illustrating the implementation of a wind turbine pitch system identification and testing method provided by the present invention.

[0038] Figure 2 This is a schematic diagram of the pitch test process;

[0039] Figure 3 This is a schematic diagram of the wind turbine pitch system identification and testing method provided in one embodiment of the present invention;

[0040] Figure 4 This is a structural block diagram of a wind turbine pitch system identification and testing device provided in an embodiment of the present invention. Detailed Implementation

[0041] The core of this invention is to provide a method, apparatus, equipment, and computer storage medium for identifying and testing wind turbine pitch systems, which effectively improves work efficiency.

[0042] To enable those skilled in the art to better understand the present invention, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please refer to Figure 1 , Figure 1 The flowchart illustrates the implementation of a wind turbine pitch system identification and testing method provided by this invention; the specific operation steps are as follows:

[0044] S101: Set the sine test parameters, step test parameters, and pitch system transfer model;

[0045] Set the required parameters for the pitch test, including the sinusoidal amplitude and period, the step change amplitude, and the pitch system design values.

[0046] The transfer model of the pitch system is a first-order or second-order transfer function.

[0047] S102: Data collection timestamp, blade pitch angle requirement, measured blade pitch angle value, and measured blade pitch angular rate value;

[0048] The sampling period is the minimum execution cycle of the control system. The data required for the pitch system identification are collected. The recorded information includes at least the timestamp, blade pitch angle requirement, measured blade pitch angle, and measured blade pitch angular rate.

[0049] S103: Set the pitch control command for the test phase to add an offset to the blade pitch angle requirement, and perform pitch test according to the pitch control command and the test outline process.

[0050] The pitch test was performed according to the test outline procedure. The pitch control command output during the test phase was to add an offset to the original blade pitch angle requirement command of the control system.

[0051] S104: Input the data from the test phase into the pitch system to transfer the model fitting parameters and obtain the pitch system identification results.

[0052] Using the data recorded during the test, and based on the transfer model used in the design of the wind turbine pitch system, the pitch system identification results are output.

[0053] Testing and evaluation are conducted to continuously monitor the performance of the pitch system throughout the entire lifecycle of a wind turbine. This involves two aspects: firstly, assessing whether the pitch system performance matches the design; and secondly, evaluating whether performance degradation has occurred after long-term continuous operation. The wind turbine pitch system identification and testing method described in this invention requires only the setting of certain parameters during the evaluation process. The subsequent testing and evaluation steps are automatically completed by the testing system, reducing the fragmentation of the pitch system identification and testing process, improving the level of automation, lowering the professional requirements for personnel, and increasing work efficiency.

[0054] like Figure 2 As shown, based on the above embodiments, this embodiment will provide a detailed description of step S103:

[0055] Step a: Set the initial offset of the blade pitch angle. When the current measured value of the blade pitch angle reaches the sum of the initial offset of the blade pitch angle and the required blade pitch angle and remains stable, update the blade pitch angle offset according to the sinusoidal variation parameter.

[0056] Step b: When the measured value of the current blade pitch angle reaches the sum of the initial blade pitch angle offset, the required blade pitch angle, and the current blade pitch angle offset, and remains stable, stop the sine test of this wheel.

[0057] Step c: Repeat the test process of steps a and b multiple times for the current set of parameters;

[0058] Step d: Adjust the parameters multiple times, and repeat the test process of step ac after each adjustment to complete all sine tests.

[0059] Step e: Update the blade pitch angle offset according to the step change parameters;

[0060] Step f: When the measured value of the current blade pitch angle reaches the sum of the initial offset of the blade pitch angle, the required blade pitch angle, and the current offset of the blade pitch angle, and remains stable, stop the wheel step test;

[0061] Step g: Repeat the test process of step ef multiple times for the current set of parameters;

[0062] Step h: Adjust the parameters multiple times, and repeat the test process in step eg after each adjustment to complete all step tests.

[0063] It should be noted that the blade pitch angle test of the present invention is not limited to sine curves and step curves, but can also be other forms of test curves such as ramps.

[0064] Based on the above embodiments, after obtaining the pitch system identification result, the following further steps are included:

[0065] The deviation between the pitch system identification results and the pitch system design parameters is calculated, and an evaluation conclusion is output based on the expert experience database to form a pitch system identification and analysis report.

[0066] like Figure 3 Based on the above embodiments, this embodiment provides a complete identification and testing method for wind turbine pitch systems, with the specific steps as follows:

[0067] The wind turbine is in normal power generation mode and will continue to operate below its rated power for some time to come.

[0068] 1) Set the amplitude period for the sine wave test, the amplitude for the step wave test, and the transfer model of the pitch system (first-order or second-order transfer function).

[0069] 2) Start data acquisition and record data timestamps, blade pitch angle requirements, measured blade pitch angle values, and measured blade pitch angular rate values.

[0070] 3) Adjust the initial offset β of the blade pitch angle o Waiting for the measured blade pitch angle to reach β c +β o 4) Set the pitch angle offset β according to the sinusoidal variation parameter, which is continuous, stable and does not change. s The control system generates a propeller pitch angle requirement β. c +β o +β s

[0071] 5) Stop the sine wave test and measure the pitch angle offset β. s Setting it to 0 ensures that the blade pitch angle of the pitch system remains stable and unchanged.

[0072] 6) Test the same set of parameters multiple times, following steps 4) and 5).

[0073] 7) Adjust the parameters and repeat steps 4)-6) until all sine tests are completed.

[0074] 8) Set the pitch angle offset β according to the step change parameters.j The control system generates a propeller pitch angle requirement β. c +β o +β j

[0075] 9) Stop the step test, and adjust the pitch angle offset β. j Setting it to 0 ensures that the blade pitch angle of the pitch system remains stable and unchanged.

[0076] 10) Test the same set of parameters multiple times, process 8)-9).

[0077] 11) Adjust the parameters and repeat steps 8)-10) until all step tests are completed.

[0078] 12) Stop data acquisition

[0079] 13) The system identification module reads the test data and fits the parameters according to the set transfer function model.

[0080] 14) The analysis report module compares the fitting results with the deviation of the design parameters and draws test conclusions.

[0081] Please refer to Figure 4 , Figure 4 A structural block diagram of a wind turbine pitch system identification and testing device provided in an embodiment of the present invention; the specific device may include:

[0082] The parameter definition module is used to set the sine test parameters, step test parameters, and pitch system transfer model;

[0083] The data recording module is used to collect data timestamps, blade pitch angle requirements, measured blade pitch angle values, and measured blade pitch angular rate values.

[0084] The pitch test module is used to set the pitch control command during the test phase to add an offset to the blade pitch angle requirement, and to perform pitch test according to the test outline process based on the pitch control command.

[0085] The system identification module is used to input the data from the testing phase into the pitch system to pass model fitting parameters and obtain the pitch system identification results.

[0086] The wind turbine pitch system identification and testing device of this embodiment is used to implement the aforementioned wind turbine pitch system identification and testing method. Therefore, the specific implementation of the wind turbine pitch system identification and testing device can be found in the embodiment section of the wind turbine pitch system identification and testing method above. For example, the parameter definition module, data recording module, pitch testing module, and system identification module are used to implement steps S101, S102, S103, and S104 in the above-mentioned wind turbine pitch system identification and testing method. Therefore, its specific implementation can be referred to the description of the corresponding embodiments, which will not be repeated here.

[0087] A specific embodiment of the present invention also provides a wind turbine pitch system identification and testing device, comprising: a memory for storing a computer program; and a processor for executing the computer program to implement the steps of the wind turbine pitch system identification and testing method described above.

[0088] A specific embodiment of the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the above-described wind turbine pitch system identification and testing method.

[0089] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0090] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0091] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0092] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0093] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method for identifying and testing a wind turbine pitch system, characterized in that, include: Set the sine test parameters, step test parameters, and pitch system transfer model; Real-time acquisition of data timestamps, blade pitch angle requirements, measured blade pitch angle values, and measured blade pitch angular rate values; The pitch control command for the testing phase is set to add an offset to the blade pitch angle requirement. Based on the pitch control command, pitch testing is performed according to the test outline procedure, including: Step a: Set the initial offset of the blade pitch angle. When the current measured value of the blade pitch angle reaches the sum of the initial offset of the blade pitch angle and the required blade pitch angle and remains stable, update the blade pitch angle offset according to the sinusoidal variation parameter. Step b: When the measured value of the current blade pitch angle reaches the sum of the initial offset of the blade pitch angle, the required blade pitch angle, and the current offset of the blade pitch angle, and remains stable, stop the sine test of this wheel. Step c: Repeat the test process of steps a and b multiple times for the current set of parameters; Step d: Adjust the parameters multiple times, and repeat the test process of step ac after each adjustment to complete all sine tests; Step e: Update the blade pitch angle offset according to the step change parameters; Step f: When the measured value of the current blade pitch angle reaches the sum of the initial offset of the blade pitch angle, the required blade pitch angle, and the current offset of the blade pitch angle, and remains stable, stop the wheel step test; Step g: Repeat the test process of step ef multiple times for the current set of parameters; Step h: Adjust the parameters multiple times, and repeat the test process in step eg after each adjustment to complete all step tests; The data from the testing phase is input into the pitch system to pass the model fitting parameters, and the pitch system identification results are obtained.

2. The wind turbine pitch system identification and testing method according to claim 1, characterized in that, The sine test parameters include the sine amplitude and period, and the step test parameters include the step change amplitude.

3. The wind turbine pitch system identification and testing method according to claim 1, characterized in that, The transfer model of the pitch system is a first-order or second-order transfer function.

4. The wind turbine pitch system identification and testing method according to claim 1, characterized in that, The sampling period for the real-time data acquisition timestamp, blade pitch angle requirement, measured blade pitch angle, and measured blade pitch angular rate is the minimum execution cycle of the control system.

5. The wind turbine pitch system identification and testing method according to claim 1, characterized in that, After inputting the test phase data into the pitch system to transfer model fitting parameters and obtaining the pitch system identification result, the process further includes: The deviation between the pitch system identification results and the pitch system design parameters is calculated to obtain a pitch system identification and analysis report.

6. A wind turbine pitch system identification and testing device, characterized in that, include: The parameter definition module is used to set the sine test parameters, step test parameters, and pitch system transfer model; The data recording module is used to collect data timestamps, blade pitch angle requirements, measured blade pitch angle values, and measured blade pitch angular rate values ​​in real time. The pitch control module is used to set the pitch control command during the testing phase to add an offset to the blade pitch angle requirement, and to perform pitch testing according to the test outline based on the pitch control command, including: Step a: Set the initial offset of the blade pitch angle. When the current measured value of the blade pitch angle reaches the sum of the initial offset of the blade pitch angle and the required blade pitch angle and remains stable, update the blade pitch angle offset according to the sinusoidal variation parameter. Step b: When the measured value of the current blade pitch angle reaches the sum of the initial offset of the blade pitch angle, the required blade pitch angle, and the current offset of the blade pitch angle, and remains stable, stop the sine test of this wheel. Step c: Repeat the test process of steps a and b multiple times for the current set of parameters; Step d: Adjust the parameters multiple times, and repeat the test process of step ac after each adjustment to complete all sine tests; Step e: Update the blade pitch angle offset according to the step change parameters; Step f: When the measured value of the current blade pitch angle reaches the sum of the initial offset of the blade pitch angle, the required blade pitch angle, and the current offset of the blade pitch angle, and remains stable, stop the wheel step test; Step g: Repeat the test process of step ef multiple times for the current set of parameters; Step h: Adjust the parameters multiple times, and repeat the test process in step eg after each adjustment to complete all step tests; The system identification module is used to input the data from the testing phase into the pitch system to pass model fitting parameters and obtain the pitch system identification results.

7. A wind turbine pitch system identification and testing device, characterized in that, include: Memory, used to store computer programs; A processor, configured to implement the steps of the wind turbine pitch system identification and testing method as described in any one of claims 1 to 5 when executing the computer program.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the wind turbine pitch system identification and testing method as described in any one of claims 1 to 5.

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