Offshore wind turbine evaluation system and method based on ground test and virtual test

Abstract

The application provides an offshore wind turbine evaluation system and method based on ground testing and virtual testing, relates to the technical field of wind power generation, and comprises a virtual testing system and a ground testing platform.The virtual testing system is configured to simulate offshore environmental conditions and grid-connected operation conditions of a wind turbine to be tested, and to generate a control signal of the ground testing platform.The ground testing platform is configured to apply the control signal to the wind turbine to be tested, collect operation state data and grid interaction data in the process of application, and return the data to the virtual testing system.The virtual testing system is further configured to evaluate the operation performance and grid-connected performance of the wind turbine to be tested.The application combines the ground testing platform and virtual testing technology, realizes accurate monitoring and evaluation of the performance of the wind turbine, provides important data support for operation and maintenance management of a wind farm, and promotes the sustainable and healthy development of the offshore wind power industry.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of wind power generation, and particularly relates to an offshore wind turbine evaluation system and method based on ground testing and virtual testing. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] With the continuous growth of global energy demand and the urgent demand for clean energy, offshore wind power has become a field of renewable energy that attracts much attention. The marine environment has the advantages of rich wind resources, high energy density, and less land occupation, and is widely considered as an important scenario for realizing future energy transformation. However, the operating environment of offshore wind turbines is complex and variable, and is affected by marine climate, sea waves, salt spray and other factors, and the performance monitoring and evaluation of wind turbines has become an important challenge.

[0004] Wind turbine performance testing is divided into two types: one is carried out on site in a wind farm, and the data is accurate and can truly reflect the operating condition of the unit, but the test condition of the unit is affected by uncontrollable factors such as weather, and the test cycle of the unit is long; at the same time, considering the complex operating environment of offshore wind turbines, it is high in installation cost and high in risk to transport the test unit to the sea; the other method often relies on a simple ground test platform, but this method is limited by the limitation of being unable to truly simulate the offshore environment, and can only measure simple data, and it is difficult to accurately reflect the performance of the wind turbine in actual offshore operation.

[0005] Therefore, in the existing wind turbine performance test scheme that is independent of the offshore wind power site, there is a lack of practical working condition simulation, which makes it difficult for the data to reflect the true condition of the real wind turbine; at the same time, there is a lack of practical data analysis and evaluation system, and the operating performance and grid-connected performance cannot be accurately evaluated. SUMMARY

[0006] In order to overcome the shortcomings of the prior art, the present application provides an offshore wind turbine evaluation system and method based on ground testing and virtual testing, which combines a ground test platform and virtual testing technology to realize accurate monitoring and evaluation of wind turbine performance, provides important data support for operation and maintenance management of wind farms, and promotes the sustainable and healthy development of the offshore wind power industry.

[0007] To achieve the above object, one or more embodiments of the present application provide the following technical solutions:

[0008] The present application provides an offshore wind turbine evaluation system based on ground testing and virtual testing.

[0009] The offshore wind turbine evaluation system based on ground test and virtual test comprises a virtual test system and a ground test platform.

[0010] The virtual test system is configured to simulate offshore environmental conditions and grid-connected operation conditions of a wind turbine to be tested, and generate control signals for the ground test platform.

[0011] The ground test platform is configured to apply the control signals to the wind turbine to be tested, collect operation state data and grid interaction data during the application process, and return the data to the virtual test system.

[0012] The virtual test system is further configured to evaluate the operation performance and grid-connected performance of the wind turbine to be tested based on the operation state data and the grid interaction data.

[0013] Further, the virtual test system comprises an environment simulation module and a grid simulation module.

[0014] The environment simulation module simulates changes in external conditions such as offshore wind farms, marine environments, and weather conditions, constructs virtual offshore environmental conditions, and generates control signals.

[0015] The grid simulation module simulates grid stability, fluctuations, and fault states during the grid connection process of the wind turbine and the grid, and generates control signals.

[0016] Further, the environment simulation module is based on a physical simulation engine and uses multi-dimensional simulation to simulate virtual offshore environmental conditions.

[0017] Further, the virtual test system further comprises a unit operation state monitoring and evaluation module and a unit grid-connected performance monitoring and evaluation module.

[0018] The unit operation state monitoring and evaluation module evaluates the operation performance of the unit through unit vibration and temperature data.

[0019] The unit grid-connected performance monitoring and evaluation module evaluates the grid-connected performance of the unit through grid stability and grid response characteristics.

[0020] Further, the ground test platform comprises an experimental equipment module.

[0021] The experimental equipment module comprises a six-degree-of-freedom load simulation device, a wind turbine to be tested, and a grid simulator.

[0022] The six-degree-of-freedom load simulation device generates torque input to the wind turbine based on the input control signals, and realizes the application of offshore conditions to the wind turbine to be tested.

[0023] The power grid simulator controls the generator based on the input control signal, and outputs the electric energy generated by the generator to the power grid simulator, and the power grid simulator simulates possible situations of the power grid.

[0024] Further, the ground test platform further comprises a sensor actual measurement module.

[0025] The sensor actual measurement module collects temperature and vibration data of each component of the wind turbine to be tested.

[0026] Further, the ground test platform further comprises a power grid interaction data monitoring module.

[0027] The power grid interaction data monitoring module collects current, voltage and power data of the wind turbine to be tested when connected to the power grid, and simultaneously collects response time, stable time and lag time.

[0028] The second aspect of the present application provides an offshore wind turbine evaluation method based on ground test and virtual test.

[0029] The offshore wind turbine evaluation method based on ground test and virtual test comprises:

[0030] The virtual test system simulates offshore environmental conditions and grid-connected operation conditions of the wind turbine to be tested, and generates control signals of the ground test platform.

[0031] The ground test platform applies the control signals to the wind turbine to be tested, collects operation state data and power grid interaction data during the application process, and returns them to the virtual test system.

[0032] The virtual test system evaluates the operation performance and grid-connected performance of the wind turbine to be tested based on the operation state data and power grid interaction data.

[0033] The third aspect of the present application provides a computer readable storage medium, which stores a program, and the program is executed by a processor to realize the steps in the offshore wind turbine evaluation system based on ground test and virtual test according to the first aspect of the present application.

[0034] The fourth aspect of the present application provides an electronic device, which comprises a memory, a processor and a program stored in the memory and executable on the processor, and the processor executes the program to realize the steps in the offshore wind turbine evaluation system based on ground test and virtual test according to the first aspect of the present application.

[0035] The above one or more technical solutions have the following beneficial effects:

[0036] The application combines a virtual test system and a ground test platform to simulate offshore environment working conditions and grid-connected operation working conditions, obtains ground measured data based on real simulation, and comprehensively and efficiently tests and evaluates operation performance and grid-connected performance of the offshore wind turbine, so as to improve operation efficiency and reliability of the offshore wind turbine, provide important data support for operation and maintenance management of the wind farm, and promote sustainable and healthy development of the offshore wind power industry.

[0037] The application evaluates operation performance and grid-connected performance of the wind turbine from aspects of vibration, temperature data, grid-connected stability and grid-connected response characteristics based on ground measured data such as operation state data and grid interaction data, so as to improve accuracy and comprehensiveness of performance evaluation of the wind turbine.

[0038] Advantages of additional aspects of the application will be partially given in the following description, partially become obvious from the following description, or be understood through practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0039] The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the application and are incorporated herein by reference. The illustrations are shown for the purpose of enabling those skilled in the art to implement the application and are not intended to limit the scope of the application.

[0040] Figure 1 It is a system structure diagram of the first embodiment.

[0041] Figure 2 It is an example diagram of the six-degree-of-freedom load simulation device of the first embodiment.

[0042] Figure 3 It is a method flowchart of the second embodiment. DETAILED DESCRIPTION

[0043] It should be noted that the following detailed description is illustrative only and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0044] It should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should be understood that when the terms "comprise" and / or "include" are used in this specification, there is a presence of the features, steps, operations, devices, components and / or combinations thereof.

[0045] Embodiment one

[0046] In one embodiment of the present disclosure, an offshore wind turbine evaluation system based on ground testing and virtual testing is provided, including a virtual testing system and a ground testing platform:

[0047] The virtual test system is configured to: simulate the offshore environmental conditions and grid-connected operating conditions of the wind turbine to be tested, and generate control signals for the ground test platform;

[0048] The ground test platform is configured to: apply control signals to the wind turbine to be tested, collect operating status data and grid interaction data during the application process, and transmit the data back to the virtual test system;

[0049] The virtual test system is further configured to evaluate the operating performance and grid-connected performance of the wind turbine to be tested based on the operating status data and the grid interaction data.

[0050] The offshore wind turbine evaluation system based on ground tests and virtual tests in this embodiment is described in detail below.

[0051] like Figure 1 As shown in the figure, the offshore wind turbine evaluation system includes the application layer - user interaction module, the technical support layer - virtual test system, and the technical support layer - ground test platform. They are described below:

[0052] 1. Application Layer - User Interaction Module

[0053] The user can achieve two functions through this module: send control instructions to the virtual test system to simulate certain working conditions, and view the evaluation results and real-time monitoring data of the virtual test system.

[0054] The control instructions here are written in advance and sent to the virtual test system to control the real-time simulation module to simulate specific offshore conditions (such as stable wind speed conditions) and the power grid simulation module to simulate specific grid-side conditions (such as stable and fault-free environmental conditions).

[0055] 2. Technical Support Layer - Virtual Test System

[0056] In order to generate control signals for the ground test platform and evaluate the operating performance and grid-connected performance of the wind turbines to be tested, it mainly consists of the following modules:

[0057] 1. Environmental simulation module

[0058] Based on the control instructions issued by the user and the physical simulation engine, the system simulates the changes in the external conditions of the offshore wind farm, marine environment, and meteorological conditions through multi-dimensional simulation, constructs a virtual offshore environment, and outputs control signals that can control the six-degree-of-freedom load simulation device and power grid simulator in the ground test platform. Specifically:

[0059] (1) Physical simulation engine: used to simulate physical phenomena in offshore wind farms, such as the effects of wind, waves, surges, etc. on wind turbines.

[0060] (2) Meteorological data integration: Integrate actual marine meteorological data, including wind speed, wind direction, temperature, humidity and other information; apply this data to the physical simulation engine to simulate the marine environment under different meteorological conditions.

[0061] (3) Ocean condition simulation: Based on the principles of oceanography, simulate the formation and evolution of waves and the movement of ocean currents; apply these data to the physical simulation engine to simulate the marine environment under different ocean conditions.

[0062] (4) Multi-dimensional parameter adjustment: Adjust multiple parameters such as ocean conditions and marine weather to simulate different marine environmental conditions and achieve multi-dimensional simulation.

[0063] (5) Real-time data update and feedback: During the simulation process, meteorological data and ocean conditions are updated in real time according to the changes in the control instructions input by the user to reflect the changes in the marine environment.

[0064] (6) Simulate the complex offshore environment and generate control signals.

[0065] 2. Power grid simulation module

[0066] According to the control instructions issued by the user, the grid connection process of the wind turbine is simulated and the control signal is sent to the grid simulation device in the ground test platform to simulate the grid stability and fault status, and to act on the wind turbine to be tested in the ground test platform.

[0067] 3. First data interaction module

[0068] (1) Used to receive control instructions issued by the user and transmit them to the information processing module for storage.

[0069] (2) It is used to receive the operating status data and grid interaction data fed back by the ground test platform, send the grid interaction data to the unit grid-connected performance monitoring and evaluation module, and send the operating status data to the unit operating status monitoring and evaluation module.

[0070] (3) Used to transmit the control signals generated by the environmental simulation module and the power grid simulation module to the ground test platform.

[0071] (4) It is used to receive the evaluation results output by the unit operation status monitoring and evaluation module and the unit grid-connected performance monitoring and evaluation module, and transmit them to the information processing module.

[0072] 4. Unit grid-connected performance monitoring and evaluation module

[0073] The ground test platform real-time generator set and grid interaction data received from the first data interaction module is used to evaluate the generator set grid-connected performance, and the evaluation results are sent to the first data interaction module and then transmitted to the information processing module.

[0074] The generator set grid-connected performance is evaluated, specifically as follows.

[0075] (1) Stability evaluation:

[0076] The grid-connected stability is evaluated according to the following four indicators.

[0077] 1) Voltage stability: After the wind turbine generator set is connected to the grid, the voltage fluctuation range of the grid is within the acceptable range.

[0078] Under normal circumstances, the voltage of the grid should be maintained within a certain range, such as the standard voltage fluctuation rate is usually ±5%, or the user can set the voltage fluctuation range according to the test unit difference and test requirement difference.

[0079] The voltage fluctuation range is set to ±A%, if the voltage fluctuation is less than ±A%, it is defined as normal, otherwise it is defined as grid-connected voltage stability failure.

[0080] 2) Frequency stability: After the wind turbine generator set is connected to the grid, whether the frequency change of the grid is within the acceptable range.

[0081] The grid frequency should generally be maintained around the standard 50Hz (or 60Hz), and the fluctuation range should be within a certain limit, usually ±0.2Hz; the limit range can be set according to the test unit difference and test requirement difference.

[0082] The voltage frequency fluctuation range is set to ±B Hz, if the frequency fluctuation is within ±B Hz, it is defined as normal, otherwise it is defined as grid-connected frequency stability failure.

[0083] 3) Voltage harmonic content: After the wind turbine generator set is connected to the grid, the voltage harmonic content of the grid is within the acceptable range.

[0084] The grid voltage harmonic content should comply with the relevant national or regional standards, and the limit range can be changed according to the test unit difference and test requirement difference.

[0085] The harmonic content is set to C%, if the harmonic content is less than C%, it is defined as normal, otherwise it is defined as grid-connected voltage harmonic content abnormal failure.

[0086] 4) Grid oscillation level: After the wind turbine generator set is connected to the grid, whether the grid oscillation level is within the acceptable range.

[0087] The grid oscillation should generally be kept within certain limits to ensure stable operation of the grid. The test requirement difference limit range can be changed according to the test unit difference.

[0088] The oscillation amplitude threshold of the grid oscillation is set as D, the oscillation frequency threshold is set as E, the measured data of the ground test platform is defined as the vibration amplitude D1 and the vibration frequency E1.

[0089] If D1≤N and E1≤M, the unit voltage oscillation level is defined as normal;

[0090] If D1≥N and E1≤M, the unit voltage oscillation level is defined as abnormal, and the oscillation amplitude is abnormal.

[0091] If D1≤N and E1≥M, the unit voltage oscillation level is defined as abnormal, and the oscillation frequency is abnormal.

[0092] If D1≥N and E1≥M, the unit voltage oscillation level is defined as abnormal, and the oscillation amplitude and the oscillation frequency are abnormal.

[0093] (2) Response characteristic evaluation:

[0094] The grid connection response characteristics are evaluated according to the following three indexes, wherein the response time, the stability time and the lag time are collected by the grid interaction data monitoring module.

[0095] 1) Response time: defined as the time from the start of grid connection to the output of electric power to the grid by the wind turbine generator.

[0096] The standard response time is usually between a few seconds and a few minutes, and the test requirement difference user can give different limit ranges according to the test unit difference.

[0097] The limit of the response time is set as T R , if the response time is less than T R , the response time is defined as normal, otherwise it is defined as abnormal failure.

[0098] 2) Stability time: refers to the time from the start of the wind turbine generator output to the stable output of power, i.e. the time of the wind turbine generator stable output power minus the time of the wind turbine generator start output power, which can be monitored by the grid interaction data monitoring module.

[0099] The stability can be evaluated by observing the fluctuation of the wind turbine generator output power, which should generally be stable within the range of the grid frequency requirement within a few seconds to a few minutes.

[0100] The limit of the stability time is set as T S , if the stability time is less than T S , the stability time is defined as normal, otherwise it is defined as abnormal., defined as normal, otherwise defined as abnormal failure.

[0101] 3) Lag time: Lag time is the sum of response time and settling time, the smaller the lag time, the faster the wind turbine responds to the grid.

[0102] According to the test unit difference, the user can give different limit ranges according to the test requirements. If the lag time is within the limit range, it is defined as normal; otherwise, it is defined as abnormal failure of lag time.

[0103] The limit of the lag time is set to T L , if the lag time is less than T L , defined as normal, otherwise defined as abnormal failure of lag time.

[0104] 5. Unit operating state monitoring and evaluation module

[0105] Receive the operating state data measured by the ground test platform and the ground test platform related data from the first data interaction module, evaluate the operating performance of the generator unit, and output the evaluation result to the first data interaction module, and then pass it to the information processing module.

[0106] Among them, the operating performance of the generator unit is evaluated, specifically:

[0107] (1) Unit vibration evaluation:

[0108] Use the vibration data measured by the ground test platform to monitor the vibration of each component of the unit and find abnormal vibration in time.

[0109] Specifically, according to the international standard or industry standard to develop evaluation standards, or according to the to-be-tested unit and test requirements to develop evaluation standards, set threshold values for vibration amplitude and frequency, two typical vibration characteristic data, when exceeding the threshold value, it is considered as abnormal vibration.

[0110] Define the vibration amplitude threshold value as N and the vibration frequency threshold value as M, and define the vibration data measured by the ground test platform as vibration amplitude N1 and vibration frequency M1.

[0111] If N1≤N and M1≤M, the unit vibration state is normal;

[0112] If N1≥N and M1≤M, the unit has abnormal vibration amplitude;

[0113] If N1≤N and M1≥M, the unit has abnormal vibration frequency;

[0114] If N1≥N and M1≥M, the unit has abnormal vibration amplitude and vibration frequency.

[0115] (2) Temperature data evaluation:

[0116] The temperature data measured by the ground test platform is used to monitor the temperature change of the unit and to timely find temperature abnormalities.

[0117] Specifically, the temperature evaluation standard is formulated according to relevant standards or experience, or according to the to-be-tested unit and test requirements; the threshold values are set for the temperature characteristics of the generator winding and the shaft of the generator unit, and when the threshold values are exceeded, it is considered that the temperature is abnormal.

[0118] The threshold value of the generator winding temperature is defined as H, and the threshold value of the generator shaft temperature is defined as K; the ground test platform measured temperature data is defined as the generator winding temperature H1 and the generator shaft temperature K1.

[0119] If H1≤H and K1≤K, the unit temperature state is normal;

[0120] If H1≥H and K1≤K, the unit has a generator winding temperature abnormality; the shaft temperature is normal;

[0121] If H1≤H and K1≥K, the unit has a generator shaft temperature abnormality; the winding temperature is normal;

[0122] If H1≥H and K1≥K, the unit has a generator winding and shaft temperature abnormality.

[0123] 6, Information processing module:

[0124] The running state data, power grid interaction data, evaluation results and corresponding control instructions are converted into database recognizable storage data and user readable data, the database readable storage data is saved to the database, and the user readable data is uploaded to the user interaction module for user to view and observe the unit running state.

[0125] (1) The user instructions using or issued through the user interaction module are converted into computer recognizable control instructions, which are then transmitted to the environment simulation module and the power grid simulation module to complete the control.

[0126] (2) The data signals output by the unit grid-connected performance monitoring and evaluation module and the unit running state monitoring and evaluation module are converted into user readable signals and transmitted to the user interaction module for user to read and monitor in real time.

[0127] (3) The evaluation results output by the unit grid-connected performance monitoring and evaluation module and the unit running state monitoring and evaluation module, the control instructions output by the environment simulation module and the power grid simulation module are taken as a group of data. After identification, they are input into the database.

[0128] Recognition logic: set the output data of the unit grid-connected performance monitoring and evaluation module, unit operation state monitoring and evaluation module as A, B, respectively, the control instructions output by the environment simulation module and the power grid simulation module as N, M.

[0129] Set a group of data (any group here is just an example) as A1, B1, N1, M1, compare it with the data in the database (not specific to a group, but refers to all data in the library), if (A1, B1, N1, M1) is consistent with (A, B, N, M), it is not saved to the database, if not consistent, it is saved to the database. Used to record and store experimental data.

[0130] (4) Information processing module receives power grid interaction data and sensor measured data through information transmission, and on the one hand, the data is converted into user-readable data and transmitted to the information processing module, and then transmitted to the user interaction module for user monitoring.

[0131] 7. Database:

[0132] Users can read the library through the user interaction module, which is used to record and store operating state data, power grid interaction data, evaluation results and corresponding control instructions.

[0133] Three, technical support layer-ground experiment platform

[0134] 1. Experimental equipment module:

[0135] Including six degrees of freedom load simulation equipment, to be measured wind turbine part, power grid simulator part.

[0136] Six degrees of freedom load simulation equipment: under the control of the control signal output by the virtual test system, it simulates and outputs the torque input to the wind turbine by the complex offshore working condition in real time and makes it act on the to-be-tested wind turbine. The mode of action here is that the output shaft of the six degrees of freedom load simulation equipment is connected to the rotating shaft of the to-be-tested wind turbine, realizing the transmission of torque.

[0137] The six degrees of freedom load simulation equipment adjusts the loading force of the hydraulic cylinder on it under the action of the control signal, and applies the force to the output shaft, so that the to-be-tested wind turbine rotates. Figure 2 The six degrees of freedom load simulation equipment is shown in the figure. The size of F (F is force) in different directions is used to simulate the torque input to the wind turbine by the offshore working condition.

[0138] To-be-tested wind turbine: compatible with high-power offshore wind turbines on the market, the six degrees of freedom load simulation equipment drives the rotating shaft of the to-be-tested wind turbine to rotate, thereby generating electricity.

[0139] The grid simulator outputs the electrical energy output by the to-be-tested unit to the grid simulator under the control of the control signal output by the virtual test system, simulates the grid stability, fluctuation and fault state in the grid-connected state of the wind turbine and the grid in real time, and makes the grid stability, fluctuation and fault state act on the to-be-tested unit in the ground test platform.

[0140] 2. The sensor measurement module:

[0141] The temperature sensor and the vibration sensor are included to collect the temperature and vibration data of each component of the to-be-tested unit and transmit the data to the second data interaction module.

[0142] 3. The grid interaction data monitoring module:

[0143] The current monitoring equipment, the voltage monitoring equipment and the power monitoring equipment are included to measure the current, voltage and power data of the to-be-tested unit in the grid-connected state, as well as the response time, the stable time and the lag time, and transmit the data to the second data interaction module.

[0144] 4. The second data interaction module

[0145] (1) receiving the control signal transmitted by the virtual test system, and then transmitting the six-degree-of-freedom load simulation device control signal to the six-degree-of-freedom load simulation device; transmitting the grid simulator control signal to the grid simulator.

[0146] (2) transmitting the data measured by the sensor measurement module and the grid interaction data monitoring module to the virtual test system.

[0147] Embodiment Two

[0148] An embodiment of the present disclosure provides a method for evaluating offshore wind turbines based on ground tests and virtual tests, as shown in Figure 3 The method comprises the following steps:

[0149] The virtual test system simulates the offshore environmental conditions and grid-connected operation conditions of the to-be-tested wind turbine, and generates the control signal of the ground test platform;

[0150] The ground test platform applies the control signal to the to-be-tested wind turbine, collects the operating state data and grid interaction data in the action process, and transmits the data back to the virtual test system;

[0151] The virtual test system evaluates the operating performance and grid-connected performance of the to-be-tested wind turbine based on the operating state data and the grid interaction data.

[0152] Embodiment Three

[0153] The purpose of the present embodiment is to provide a computer-readable storage medium.

[0154] A computer readable storage medium, having stored thereon a computer program, which when executed by a processor implements the steps of the offshore wind turbine evaluation system based on ground test and virtual test according to the embodiment one of the present disclosure.

[0155] Embodiment four

[0156] An object of the present embodiment is to provide an electronic device.

[0157] An electronic device, comprising a memory, a processor, and a program stored in the memory and executable in the processor, wherein the processor implements the steps of the offshore wind turbine evaluation system based on ground test and virtual test according to the embodiment one of the present disclosure when executing the program.

[0158] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Offshore wind turbine evaluation system based on ground testing and virtual testing, characterized in that, The virtual testing system and the ground test platform are included: The virtual testing system is configured to simulate offshore environmental conditions and grid-connected operation conditions of a wind turbine to be tested, and generate control signals for the ground test platform; The ground test platform is configured to act on the wind turbine to be tested with the control signals, collect operation state data and grid interaction data during the action process, and return them to the virtual testing system; The virtual testing system is further configured to evaluate the operation performance and grid-connected performance of the wind turbine to be tested based on the operation state data and the grid interaction data; The virtual testing system includes an environmental simulation module and a grid simulation module; The environmental simulation module is based on a physical simulation engine and simulates changes in external conditions such as offshore wind farms, marine environments, and meteorological conditions through multi-dimensional simulation according to control instructions issued by the user, constructs a virtual offshore environmental condition, and outputs control signals for the six-degree-of-freedom load simulation device and the grid simulator in the ground test platform, specifically: (1) Physical simulation engine: used to simulate physical phenomena in offshore wind farms, such as wind, waves, and surges, and their effects on wind turbines; (2) Meteorological data integration: integrates actual offshore meteorological data, including wind speed, wind direction, air temperature, humidity, and other information; applies these data to the physical simulation engine to simulate offshore environments under different meteorological conditions; (3) Marine condition simulation: simulates the formation and evolution of sea waves and the movement rules of ocean currents based on oceanographic principles; applies these data to the physical simulation engine to simulate offshore environments under different marine conditions; (4) Multi-dimensional parameter adjustment: adjusts multiple parameters such as marine conditions and marine meteorology to simulate different offshore environmental conditions and achieve multi-dimensional simulation; (5) Real-time data updating and feedback: during simulation, real-time update meteorological data and marine conditions according to changes in user input control instructions to reflect changes in offshore environments; (6) Simulate complex offshore environments and generate control signals; The grid simulation module simulates the grid-connected process of the wind turbine with the grid according to the control instructions issued by the user and issues control signals to the grid simulation device in the ground test platform, which simulates grid stability and fault conditions and acts on the wind turbine to be tested in the ground test platform; The virtual testing system further includes a unit operation state monitoring and evaluation module and a unit grid-connected performance monitoring and evaluation module; the evaluation results output by the unit grid-connected performance monitoring and evaluation module and the unit operation state monitoring and evaluation module, the control instructions output by the environmental simulation module and the grid simulation module, and the four as a group of data; After identification, input the database.

2. An offshore wind turbine evaluation system based on ground testing and virtual testing as claimed in claim 1, characterized in that, The environmental simulation module is based on a physical simulation engine and simulates offshore environmental conditions through multi-dimensional simulation.

3. The offshore wind turbine evaluation system based on ground test and virtual test according to claim 1, wherein: The unit operation state monitoring and evaluation module evaluates the operation performance of the unit through unit vibration and temperature data; The unit grid-connected performance monitoring and evaluation module evaluates the unit grid-connected performance through grid-connected stability and grid-connected response characteristics.

4. The offshore wind turbine evaluation system based on ground testing and virtual testing of claim 1, wherein, The ground test platform comprises an experimental equipment module; The experimental equipment module comprises a six-degree-of-freedom load simulation device, a wind turbine to be tested, and a power grid simulator; The six-degree-of-freedom load simulation device generates torque input to the wind turbine based on the input control signal, and realizes the action of offshore working conditions on the wind turbine to be tested; The power grid simulator controls the generator based on the input control signal, outputs the power generated by the generator to the power grid simulator, and simulates the possible conditions of the power grid.

5. The offshore wind turbine evaluation system based on ground testing and virtual testing of claim 1, wherein, The ground test platform further comprises a sensor measurement module; The sensor measurement module collects temperature and vibration data of each component of the wind turbine to be tested.

6. The offshore wind turbine evaluation system based on ground testing and virtual testing of claim 1, wherein, The ground test platform further comprises a power grid interaction data monitoring module; The power grid interaction data monitoring module collects current, voltage and power data when the wind turbine to be tested is connected to the grid, and simultaneously collects response time, stabilization time and lag time.

7. A method for offshore wind turbine evaluation based on ground testing and virtual testing, characterized in that, It comprises: The virtual test system simulates offshore environmental conditions and grid-connected operation conditions of the wind turbine to be tested, and generates control signals for the ground test platform; The ground test platform applies the control signals to the wind turbine to be tested, collects operating state data and power grid interaction data during the action, and returns them to the virtual test system; The virtual test system evaluates the operating performance and grid-connected performance of the wind turbine to be tested based on the operating state data and power grid interaction data; The virtual test system comprises an environment simulation module and a power grid simulation module; The environment simulation module is based on a physical simulation engine and simulates changes in external conditions such as offshore wind farms, marine environments and meteorological conditions through multi-dimensional simulation according to control instructions issued by the user, constructs a virtual offshore environmental condition, and outputs control signals for the six-degree-of-freedom load simulation device and the power grid simulator in the ground test platform, specifically: (1) Physical simulation engine: used to simulate physical phenomena in offshore wind farms, such as wind, waves, swells and their effects on wind turbines; (2) Meteorological data integration: integrates actual offshore meteorological data, including wind speed, wind direction, air temperature, humidity and other information; applies these data to the physical simulation engine to simulate offshore environments under different meteorological conditions; (3) Marine condition simulation: simulates the formation and evolution of sea waves and the movement law of ocean currents according to marine principles; applies these data to the physical simulation engine to simulate offshore environments under different marine conditions; (4) Multi-dimensional parameter adjustment: adjust multiple parameters such as marine conditions and marine meteorology to simulate different offshore environmental conditions and achieve multi-dimensional simulation; (5) Real-time data updating and feedback: during simulation, update meteorological data and marine conditions in real time according to changes in user input control instructions to reflect changes in offshore environments; (6) Simulate complex offshore environments and generate control signals; The power grid simulation module is used to simulate the grid-connection process of the wind turbine with the power grid according to the control instruction issued by the user, and to issue a control signal to the power grid simulation device in the ground test platform, so that the power grid simulation device simulates the stable state and the fault state of the power grid and acts on the wind turbine to be tested in the ground test platform. The virtual test system further comprises a unit operation state monitoring and evaluation module and a unit grid-connection performance monitoring and evaluation module; evaluation results output by the unit grid-connection performance monitoring and evaluation module and the unit operation state monitoring and evaluation module, control instructions output by the environment simulation module and the power grid simulation module are taken as a group of data. After identification, input the database.

8. An electronic device, comprising: a memory for non-transiently storing computer readable instructions; a processor for running the computer readable instructions; wherein the computer readable instructions, when executed by the processor, perform the method of claim 7.

9. A storage medium characterized by, non-transiently storing computer readable instructions, wherein when the computer readable instructions are executed by a computer, the method of claim 7 is performed.

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