Test platform for testing wind generating set

Abstract

The invention provides a test platform for testing a wind generating set. The test platform comprises a data acquisition system used for acquiring mechanical characteristic parameters of a tested unit in real time; the dynamic real-time simulation system is used for performing real-time simulation to obtain working environment data of the tested unit and performing real-time simulation to obtain a torque control signal and a load control signal based on the working environment data and the mechanical characteristic parameters; the dragging system is used for simulating an impeller system of the tested unit to provide rotation dragging energy for the tested unit according to the torque control signal; and the load loading system is used for simulating the impeller system to apply a load to the tested unit according to the load control signal.

Description

Technical Field

[0001] The present disclosure generally relates to the field of wind power generation technology, and more particularly, to a test platform for testing a wind turbine generator set. Background Art

[0002] For large wind turbines (hereinafter referred to as wind turbines), full-scale ground test platforms are usually used to test the whole machine to verify the performance of the machine. Accurate simulation of actual working conditions on site is the premise that the full-scale test platform test can effectively replace the on-site prototype test. In order to achieve this goal, hardware-in-the-loop simulation experiment technology is needed.

[0003] Hardware-in-the-loop experimental technology is divided into signal-level and power-level hardware-in-the-loop. Most of the existing hardware-in-the-loop test platforms for wind turbines use signal-level hardware-in-the-loop simulation. In this test platform, only the physical controller of the test unit can be connected to the simulation loop, and power exchange cannot be performed between the actual power equipment of the test unit and the digital simulation system. Therefore, the power equipment body can only be modeled and simulated in the real-time simulation system. Because the power equipment body of the test unit is still a model simulation, the signal-level hardware-in-the-loop can only complete the performance test of the physical controller, but cannot perform the performance test of the physical power equipment. To solve this problem, it is necessary to develop a large-scale wind turbine power-level hardware-in-the-loop test platform to introduce the power equipment entity of the test unit into the experimental system, so as to comprehensively test the unit performance. Summary of the invention

[0004] An exemplary embodiment of the present disclosure provides a test platform for testing a wind turbine generator set, which has the ability to test a power device entity of the tested set.

[0005] According to an embodiment of the present disclosure, a test platform for testing a wind turbine generator set is provided, comprising: a data acquisition system for acquiring mechanical characteristic parameters of the test set in real time; a dynamic real-time simulation system for simulating and obtaining working environment data of the test set in real time, and based on the working environment data and the mechanical characteristic parameters, simulating and obtaining a torque control signal and a load control signal in real time; a drag system for simulating the impeller system of the test set to provide rotational drag energy for the test set according to the torque control signal; and a load loading system for simulating the impeller system to apply a load to the test set according to the load control signal.

[0006] Optionally, the real-time dynamic simulation system simulates the hub center load signal of the impeller system in real time based on the working environment data and the mechanical characteristic parameters, and decouples the hub center load signal according to the fluid-solid coupling characteristics to obtain the torque control signal and the load control signal.

[0007] Optionally, the real-time dynamic simulation system obtains the working environment data through real-time simulation using a working environment simulation model, and obtains the torque control signal and the load control signal through real-time simulation using an impeller simulation model and a tower simulation model of the test unit based on the working environment data and the mechanical characteristic parameters.

[0008] Optionally, the load loading system is a five-degree-of-freedom load loading system; the loads applied by the load loading system to the test unit include: axial force, radial force, and bending moment.

[0009] Optionally, the data acquisition system is also used to acquire the electrical characteristic parameters of the test unit in real time; wherein the test platform also includes: a real-time power simulation system, used to obtain a voltage control signal based on the real-time simulation of the electrical characteristic parameters; a power grid simulation system, used to simulate the power grid applying a strong power signal to the grid connection point of the test unit according to the voltage control signal.

[0010] Optionally, the electric power real-time simulation system obtains the voltage control signal based on the electrical characteristic parameters through a power grid simulation model.

[0011] Optionally, the working environment data includes at least one of the following items: wind resource data, wave impact data; and / or, the mechanical characteristic parameters include at least one of the following items: rotational speed, torque, pitch angle, vibration, deformation; and / or, the electrical characteristic parameters include at least one of the following items: current at the grid connection point, voltage at the grid connection point, phase at the grid connection point, frequency at the grid connection point, converter grid-side voltage, converter grid-side current.

[0012] Optionally, the test platform also includes: a coupling for connecting the drag system and the load loading system to transmit the torque generated by the drag system to the test unit via the load loading system and prevent the load generated by the load loading system from being transmitted back to the drag system.

[0013] Optionally, the test platform further includes: an evaluation system for evaluating the mechanical performance and electrical performance of the tested unit based on the data acquired by the data acquisition system.

[0014] Optionally, the test platform also includes: a power distribution system for providing power to the test platform; wherein the power distribution system includes: an AC bus, a power supply, a first transformer and a second transformer; wherein one side of the first transformer is connected to the grid connection point via the power grid simulation system, and the other side of the first transformer is connected to the AC bus; the traction system is connected to the AC bus via the second transformer; and the power supply is connected to the AC bus.

[0015] According to the test platform for testing a wind turbine generator set according to the exemplary embodiment of the present disclosure, it is possible to test the physical entity of the power equipment of the tested set, thereby improving the accuracy, effectiveness and comprehensiveness of the set performance test.

[0016] In the following description, some aspects and / or advantages of the general inventive concept will be set forth, and some other aspects and / or advantages will be known through the following description or the implementation of the general inventive concept. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] These and / or other aspects and advantages of the present application will become clearer and easier to understand from the following detailed description of the embodiments of the present application in conjunction with the accompanying drawings, in which:

[0018] Figure 1 A structural block diagram showing a test platform for testing a wind turbine generator set according to a first exemplary embodiment of the present disclosure;

[0019] Figure 2 A structural block diagram showing a test platform for testing a wind turbine generator set according to a second exemplary embodiment of the present disclosure;

[0020] Figure 3 A structural block diagram of a test platform for testing a wind turbine generator system according to a third exemplary embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0021] Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like parts throughout. The embodiments will be described below with reference to the drawings in order to explain the present disclosure.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0023] It should be noted that the phrase "at least one of the items" in the present disclosure includes three types of parallel situations: "any one of the items", "a combination of any number of the items", and "all of the items". For example, "including at least one of A and B" includes the following three parallel situations: (1) including A; (2) including B; (3) including A and B. Another example is "executing at least one of step 1 and step 2" which means the following three parallel situations: (1) executing step 1; (2) executing step 2; (3) executing step 1 and step 2.

[0024] Figure 1 A structural block diagram of a test platform 100 for testing a wind turbine generator system according to a first exemplary embodiment of the present disclosure is shown.

[0025] like Figure 1 As shown, a test platform 100 for testing a wind turbine generator set according to a first exemplary embodiment of the present disclosure includes: a data acquisition system 101 , a dynamic real-time simulation system 102 , a towing system 103 , and a load loading system 104 .

[0026] The data acquisition system 101 is used to acquire in real time the mechanical characteristic parameters of the tested unit 200. As an example, the mechanical characteristic parameters may include but are not limited to at least one of the following items: rotation speed, torque, pitch angle, vibration, and deformation.

[0027] The dynamic real-time simulation system 102 is used to obtain the working environment data of the tested unit 200 through real-time simulation, and based on the working environment data and mechanical characteristic parameters, obtain the torque control signal and the load control signal through real-time simulation.

[0028] The drag system 103 is used to simulate the impeller system of the tested unit 200 according to the torque control signal to provide rotational drag energy for the tested unit 200. Specifically, the rotational drag energy is provided for the mechanical transmission system entity of the tested unit 200.

[0029] The load applying system 104 is used to simulate the impeller system to apply a load to the tested unit 200 according to the load control signal. Specifically, the load is applied to the mechanical transmission system of the tested unit 200.

[0030] As an example, the tested unit 200 may include but is not limited to the following items: a nacelle, a main shaft system, a generator assembly, a converter, a control system, and matching tooling. As an example, the control system may include: a main controller, in addition to which, it may also include but is not limited to at least one of the following items: a converter controller, a yaw controller, and a pitch controller. Here, the tested unit 200 does not include an impeller system, and the impeller system of the tested unit 200 is simulated by the drag system 103 and the load loading system 104. As an example, the mechanical transmission system of the tested unit 200 may include but is not limited to: a main shaft, a gearbox, and a generator; the electrical transmission system of the tested unit 200 may include but is not limited to: a generator and a converter.

[0031] Exemplary embodiments of the data acquisition system 101 , the dynamics real-time simulation system 102 , the dragging system 103 , and the load applying system 104 will be described in detail below.

[0032] The data acquisition system 101 may directly acquire the mechanical characteristic parameters of the tested machine group 200 , and / or acquire the mechanical characteristic parameters of the tested machine group 200 through a measuring device in the data acquisition system 101 .

[0033] As an example, the unit under test 200 can measure its own mechanical characteristic parameters through its own measuring devices (e.g., sensors), and these measuring devices will upload the measured mechanical characteristic parameters to the control system of the unit under test 200. Therefore, the data acquisition system 101 can directly obtain these mechanical characteristic parameters from the control system of the unit under test 200. In addition, for some mechanical characteristic parameters (e.g., pitch angle), although they cannot be obtained by directly measuring them, they can be obtained from the control system of the unit under test 200.

[0034] As an example, the data acquisition system 101 may include a three-component sensor, which is used to measure the torque from the drag system 103 and the load from the load loading system 104 on the test unit 200. On the one hand, the data measured by the three-component sensor can provide support for the energy transfer efficiency and reliability evaluation of the whole machine; on the other hand, the data measured by the three-component sensor can be used to verify whether the load generated by the load loading system 104 and the torque generated by the drag system 103 meet the expected goals.

[0035] As an example, the real-time dynamic simulation system 102 can simulate the hub center load signal of the impeller system of the test unit 200 in real time based on the working environment data and mechanical characteristic parameters, and decouple the hub center load signal according to the fluid-solid coupling characteristics to obtain a torque control signal and a load control signal.

[0036] As an example, the load loading system 104 may be a five-degree-of-freedom load loading system. As an example, the load applied by the load loading system 104 to the test unit 200 may include: axial force (Fx), radial force (Fy, Fz), bending moment (My, Mz). Thus, according to the exemplary embodiment of the present disclosure, a six-degree-of-freedom loading system consisting of the drag system 103 and the five-degree-of-freedom load loading system 104 is realized, where the six degrees of freedom specifically include: torque, axial force (Fx), radial force (Fy, Fz), bending moment (My, Mz).

[0037] As an example, the real-time dynamic simulation system 102 can obtain working environment data through real-time simulation of the working environment simulation model, and obtain torque control signals and load control signals through real-time simulation of the impeller simulation model and the tower simulation model of the test unit 200 based on the working environment data and mechanical characteristic parameters.

[0038] As an example, the working environment data may include but is not limited to at least one of the following items: wind resource data, wave impact data. As an example, the working environment simulation model may include but is not limited to: a turbulent wind simulation model.

[0039] As an example, real-time working environment data and mechanical characteristic parameters can be input into the impeller simulation model and the tower simulation model to obtain the hub center load signal of the impeller system simulated in real time by the model, and then the hub center load signal is decoupled to obtain the corresponding torque control signal and non-torque five-degree-of-freedom load control signal, which act in real time on the traction system 103 and the load loading system 104, and then the real-time simulated hub center load signal is applied to the mechanical transmission system of the test unit 200.

[0040] As an example, the traction system 103 may include: a transmission inverter and a traction motor. For example, the torque control signal may be sent to a controller of the transmission inverter, and the load control signal may be sent to a controller of the load loading system 104 .

[0041] As an example, the torque control signal and the load control signal generated by the dynamics real-time simulation system 102 can be transmitted to the drag system 103 and the load loading system 104 through the physical-digital interface to ensure that the total delay of the entire test system is less than the simulation step of the dynamics real-time simulation and to make the system error converge. For example, the interface algorithm used by the physical-digital interface may include but is not limited to: ideal transformer method (ITM), damped impedance method (DIM), SDIM-ITM interface algorithm.

[0042] According to an exemplary embodiment of the present disclosure, through a six-degree-of-freedom loading system (drag system 103 + five-degree-of-freedom load loading system 104) and a real-time dynamic simulation system 102, the mass difference, stiffness difference, and damping characteristic difference between the test unit on the test platform and the on-site unit are compensated, the center load of the unit hub is truly simulated, and the mechanical performance of the unit is tested.

[0043] Figure 2 A structural block diagram of a test platform 100 for testing a wind turbine generator system according to a second exemplary embodiment of the present disclosure is shown.

[0044] like Figure 2 As shown, the test platform 100 for testing wind turbine generator sets includes, in addition to a data acquisition system 101 , a dynamic real-time simulation system 102 , a towing system 103 , and a load loading system 104 , an electric power real-time simulation system 105 and a power grid simulation system 106 .

[0045] The data acquisition system 101 is also used to acquire in real time the electrical characteristic parameters of the tested unit 200. As an example, the electrical characteristic parameters may include but are not limited to at least one of the following items: current at the grid connection point, voltage at the grid connection point, phase at the grid connection point, frequency at the grid connection point, grid-side current of the converter, and grid-side voltage of the converter.

[0046] The power real-time simulation system 105 is used to obtain a voltage control signal based on the electrical characteristic parameters in real-time simulation. As an example, the power real-time simulation system 105 can obtain a voltage control signal based on the electrical characteristic parameters in real-time simulation through a power grid simulation model.

[0047] The power grid simulation system 106 is used to simulate the power grid to apply a strong power signal to the grid connection point of the tested unit 200 according to the voltage control signal, that is, to provide a power grid environment for the electrical drive system of the tested unit 200.

[0048] As an example, real-time electrical characteristic parameters can be input into the grid simulation model to obtain a real-time simulated voltage control signal of the grid connection point voltage amplitude, phase, frequency and other changes taking into account the wind power-grid interaction characteristics, and the voltage control signal is applied to the grid simulation system 106 in real time, and then the real-time simulated grid environment is applied to the electrical transmission system of the test unit 200.

[0049] As an example, the power grid environment simulated by the power grid simulation system 106 may include, but is not limited to, at least one of the following items: voltage fluctuation, frequency fluctuation, harmonic injection, voltage drop, and voltage surge.

[0050] As an example, the voltage control signal generated by the real-time power simulation system 105 can be transmitted to the power grid simulation system 106 through the physical-digital interface to ensure that the total delay of the entire test system is less than the simulation step of the real-time power simulation and to converge the system error. For example, the interface algorithm used by the physical-digital interface may include but is not limited to: ideal transformer method (ITM), damped impedance method (DIM), SDIM-ITM interface algorithm.

[0051] According to an exemplary embodiment of the present disclosure, through the real-time power simulation system 105 and the power grid simulation system 106, the real power grid operating condition simulation of the unit's grid-connected point is realized to verify the unit's grid-connected performance (grid adaptability, fault ride-through, power quality, etc.).

[0052] According to an exemplary embodiment of the present disclosure, the actual on-site operating conditions of the test unit (including wind conditions (for example, turbulent conditions), complex power grid conditions, etc.) are flexibly and accurately simulated through the dynamic real-time simulation system 102 and the power real-time simulation system 105, so as to achieve accurate restoration of the real operating conditions of the unit, thereby fully verifying the mechanical and electrical characteristics of the unit under real changing conditions and exploring the performance boundaries of the unit; through the six-degree-of-freedom loading system (drag system 103 + five-degree-of-freedom load loading system 104) and the power grid simulation system 106, the turbulent wind model, power grid model, etc. are power amplified, and the signal flow is converted into a power flow, so as to achieve testing of the power equipment entity of the test unit, rather than just testing of the unit control system.

[0053] According to the exemplary embodiments of the present disclosure, it is possible to ensure that the unit under test is directly connected to the test platform in the form of a physical body, and only the environment in which the unit is located and the coupling between the two need to be modeled and simulated in real time, without the need to model the unit power equipment body, and the test platform has both simulation flexibility and experimental accuracy. The exemplary embodiments of the present disclosure are suitable for performance testing of large wind turbine generator sets, subsystems, and components, without distinguishing between direct drive, semi-direct drive, double-fed and other technical routes.

[0054] Figure 3 A structural block diagram of a test platform 100 for testing a wind turbine generator system according to a third exemplary embodiment of the present disclosure is shown.

[0055] like Figure 3 As shown, the test platform 100 for testing a wind turbine generator set includes, in addition to a data acquisition system 101, a dynamic real-time simulation system 102, a drag system 103, a load loading system 104, a power real-time simulation system 105, and a power grid simulation system 106, at least one of a coupling 107, an evaluation system 108, and a power distribution system 109. It should be understood that the test platform 100 for testing a wind turbine generator set may also include other systems or devices, which are not limited by the present disclosure.

[0056] The coupling 107 is used to connect the drag system 103 and the load loading system 104 to transmit the torque generated by the drag system 103 to the test unit 200 via the load loading system 104 and prevent the load generated by the load loading system 104 from being transmitted back to the drag system 103 .

[0057] As an example, the drag system 103 can be connected to the test unit 200 via the coupling 107, the load loading system 104, and the three-component sensor in sequence. That is, the torque and speed provided by the drag system 103 are transmitted to the test unit 200 through the coupling 107, the load loading system 104, the three-component sensor and other shaft system components, and the load generated by the load loading system 104 is also transmitted to the test unit 200 via the three-component sensor.

[0058] As an example, the coupling 107 mainly realizes three functions: torque transmission: the torque generated by the drag system 103 is transmitted to the load loading system 104 through the coupling; five-degree-of-freedom deformation compensation: the load generated by the load loading system 104 is only required to be applied to the test unit 200, and is not allowed to be transmitted back to the drag system 103. The coupling 107 must compensate for the loads of the five degrees of freedom Fx, Fy, Fz, My, and Mz; convenient disassembly and assembly: the test platform 100 will be disassembled and assembled many times throughout its life cycle. The coupling 107 must avoid damage to the test unit 200 and the test platform 100 during disassembly and assembly.

[0059] The evaluation system 108 is used to evaluate the mechanical performance and electrical performance of the tested unit 200 based on the data acquired by the data acquisition system 101 .

[0060] The power distribution system 109 is used to provide power to the test platform 100 .

[0061] As an example, the power distribution system 109 may include an AC bus, a power supply, a first transformer, and a second transformer; one side of the first transformer is connected to the grid connection point via the power grid simulation system 106, and the other side of the first transformer is connected to the AC bus; the drive system 103 is connected to the AC bus via the second transformer; and the power supply is connected to the AC bus. According to an exemplary embodiment of the present disclosure, the electric energy generated by the test unit 200 can be provided to the power distribution system 109, so that the power distribution system 109 can realize closed-loop feedback of electric energy. In addition, the power distribution system 109 can also realize open-loop electric energy, which is not limited by the present disclosure.

[0062] As an example, a method for using the test platform 100 for testing a wind turbine generator system according to an exemplary embodiment of the present disclosure includes:

[0063] Step 1: Connect the physical body of the test unit 200 to the test platform 100. Complete the mechanical connection between the nacelle and the base of the test platform 100, the mechanical connection between the main shaft system and the three-component sensor, and the electrical connection between the generator and the converter, and between the converter and the grid connection point.

[0064] Step 2: Layout of measuring devices and debugging of data acquisition system 101. Sensors for measuring parameters reflecting the mechanical characteristics of the tested unit 200, such as rotation speed, torque, and vibration, and sensors for measuring parameters reflecting the electrical characteristics of the unit, such as current and voltage, are arranged at the corresponding positions of the tested unit 200 and the grid connection point, and connected to the data acquisition system 101 to ensure real-time monitoring of the unit status and signal acquisition feedback.

[0065] Step 3: Establish the simulation model required for the power hardware-in-the-loop test of the test unit 200. As an example, the mechanical subsystems such as turbulent wind, waves, impellers, and towers can be finely modeled to simulate the hub center load under the actual working conditions of the unit; the power grid of the test unit 200 grid connection point can be modeled to simulate the power grid environment of the test unit in the wind farm.

[0066] Step 4: Physical-digital interface algorithm debugging. Monitor and record the time lag, delay, state feedback error, etc. between the test unit 200 and the simulation model. By adjusting the physical-digital interface algorithm, ensure that the total delay of the entire test system is less than the simulation step of the dynamics and power real-time simulation, and the system error converges.

[0067] Step 5: Perform a multi-domain power hardware-in-the-loop test on the test unit 200.

[0068] The unit hub center load signal simulated by the dynamic real-time simulation system 102 is transmitted to the drive system 103 and the five-degree-of-freedom load loading system 104 through the physical-digital interface, and the drive system 103 and the load loading system 104 are used to perform power amplification to apply the real hub center load to the main shaft of the test unit 200. At the same time, the speed, torque and other information acquired by the data acquisition system 101 are transmitted to the dynamic real-time simulation system 102, so that the dynamic real-time simulation system 102 can adjust its output in real time, and transmit the adjusted hub center load to the actuator (i.e., the drive system 103 and the load loading system 104) at the next simulation step, and apply it to the main shaft of the test unit 200 again after power amplification, so as to realize the mechanical domain power hardware-in-the-loop test of the test unit 200.

[0069] The real-time power simulation system 105 transmits the voltage reference signal simulated by the power grid model to the power grid simulation system 106 through the physical-digital interface, and uses the power grid simulation system 106 to perform power amplification to form a real strong electric signal and apply it to the inverter grid connection point of the test unit 200, so as to truly simulate various power grid conditions such as voltage fluctuation, frequency fluctuation, harmonic injection, three-phase symmetrical\asymmetrical faults, etc. that the unit may encounter in an actual wind farm. At the same time, the voltage, current and other signals obtained by the data acquisition system 101 are transmitted to the real-time power simulation system 105 to simulate the next step of the voltage reference signal, and after power amplification by the power grid simulation system 106, it is applied to the inverter grid connection point of the test unit 200 again, so as to realize the electrical domain power hardware-in-the-loop test of the test unit 200.

[0070] Step 6: Data collection and analysis. During the multi-domain power hardware-in-the-loop test, the data acquisition system 101 collects and records various parameters of the test unit 200. After the test, the collected data is analyzed to comprehensively evaluate the mechanical and electrical performance of the test unit 200 under the actual hub center load and variable grid conditions.

[0071] Considering that the existing technical solutions are all signal-level hardware-in-the-loop test systems, the test objects can only cover the unit controller and do not have the ability to test the unit power equipment entity. Therefore, a unit multi-domain (including mechanical domain and electrical domain) power hardware-in-the-loop test platform is provided. Through the accurate simulation of the unit hub center load and the complex grid working conditions of the unit grid connection point, the performance test of the unit, subsystems, and component bodies is realized. It has the following characteristics:

[0072] Based on the structure of mainstream large-megawatt units and the actual needs of continuous innovation of future large-megawatt units, the unit components, subsystems and whole-machine transmission tests, loading tests, grid-connected tests, performance evaluation and fault diagnosis of all main models such as direct drive, semi-direct drive, and double-fed units and large-megawatt units to be developed in the future are realized, providing a strong platform support for unit testing;

[0073] Equipped with a mechanical-electrical multi-domain power hardware-in-the-loop test system, the unit power equipment body can be tested, rather than just the controller. That is, the test object is the physical body of the unit, component or subsystem, rather than the simulation model, and the experimental results are real and reliable.

[0074] The tested unit participates as an actual physical system, and there is no need to establish its detailed dynamic model and electrical model. It only needs to interact with the dynamic and power grid real-time simulation models through simple external characteristic parameters such as speed, torque, pitch angle, displacement, voltage, current, impedance, etc.

[0075] Through the physical-digital interface algorithm, power interaction between the physical body of the test unit and the real-time simulation digital system is realized, which can eliminate the errors and response delays of the power hardware-in-the-loop test system during the power amplification process, as well as the influence of factors such as damping differences between the simulation system and the actual system, time lag delay, and state feedback error on the test system.

[0076] It should be understood that each system in the test platform 100 for testing a wind turbine generator system according to the exemplary embodiment of the present disclosure may be implemented as a hardware component and / or a software component. A person skilled in the art may implement each system, for example, using a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC) according to the processing performed by each defined system.

[0077] Although some exemplary embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that modifications may be made to these embodiments without departing from the scope and spirit of the present disclosure as defined by the claims and their equivalents.

Claims

1. A test platform for testing wind turbines. It is characterized in that include: Data acquisition system, used to obtain the mechanical characteristic parameters of the tested unit in real time; A dynamic real-time simulation system, used for obtaining the working environment data of the tested unit through real-time simulation, and obtaining the torque control signal and the load control signal through real-time simulation based on the working environment data and the mechanical characteristic parameters; A drag system, used for simulating the impeller system of the tested unit to provide rotational drag energy for the tested unit according to the torque control signal; The load loading system is used to simulate the impeller system to apply load to the test unit according to the load control signal.

2. The test platform according to claim 1, It is characterized in that The dynamic real-time simulation system simulates the hub center load signal of the impeller system in real time based on the working environment data and the mechanical characteristic parameters, and decouples the hub center load signal according to the fluid-solid coupling characteristics to obtain the torque control signal and the load control signal.

3. The test platform according to claim 1, It is characterized in that The dynamic real-time simulation system obtains the working environment data through real-time simulation using a working environment simulation model, and obtains the torque control signal and the load control signal through real-time simulation using an impeller simulation model and a tower simulation model of the test unit based on the working environment data and the mechanical characteristic parameters.

4. The test platform according to any one of claims 1 to 3, It is characterized in that The load loading system is a five-degree-of-freedom load loading system; The loads applied by the load loading system to the tested unit include: axial force, radial force, and bending moment.

5. The test platform according to claim 1, It is characterized in that The data acquisition system is also used to obtain the electrical characteristic parameters of the tested unit in real time; The test platform further includes: A real-time power simulation system, used for obtaining a voltage control signal based on the electrical characteristic parameters in real-time simulation; The power grid simulation system is used to simulate the power grid applying a strong power signal to the grid connection point of the test unit according to the voltage control signal.

6. The test platform according to claim 5, It is characterized in that The electric power real-time simulation system obtains the voltage control signal through a power grid simulation model based on the electrical characteristic parameters in real-time simulation.

7. The test platform according to claim 5, It is characterized in that The working environment data includes at least one of the following items: wind resource data, wave impact data; And / or, the mechanical characteristic parameter includes at least one of the following items: rotation speed, torque, pitch angle, vibration, deformation; And / or, the electrical characteristic parameter includes at least one of the following items: current at the grid connection point, voltage at the grid connection point, phase at the grid connection point, frequency at the grid connection point, converter grid-side voltage, converter grid-side current.

8. The test platform according to claim 1, It is characterized in that The test platform also includes: A coupling is used to connect the drag system and the load loading system to transmit the torque generated by the drag system to the tested unit via the load loading system and prevent the load generated by the load loading system from being transmitted back to the drag system.

9. The test platform according to claim 5, It is characterized in that The test platform also includes: An evaluation system is used to evaluate the mechanical performance and electrical performance of the tested unit based on the data acquired by the data acquisition system.

10. The test platform according to claim 5, It is characterized in that The test platform further comprises: a power distribution system for providing power to the test platform; Wherein, the power distribution system comprises: an AC bus, a power supply, a first transformer and a second transformer; Wherein, one side of the first transformer is connected to the grid connection point via the grid simulation system, and the other side of the first transformer is connected to the AC bus; The drive system is connected to the AC bus via the second transformer; The power source is connected to the AC bus.

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