Multi-source information fusion wind turbine multi-condition test platform

Abstract

This invention provides a multi-source information fusion-based multi-condition test platform for wind turbine generators, relating to the field of wind turbine generator testing technology. The test platform includes: a test unit, a first electrical system, a second electrical system, a mechanical state sensing device, an electrical parameter sensing device, and a data acquisition system. The mechanical state sensing device is installed on the drive chain from the drive motor and transmission system to the generator, used to detect the mechanical dynamic data of the transmission chain. The electrical parameter sensing device is installed on the electrical link between the first and second electrical systems, used to detect the electrical data of the first and second electrical systems. The data acquisition system is used to uniformly receive the mechanical dynamic data and electrical data, and align the timestamps of the mechanical dynamic data and electrical data. This platform can enrich the dimensions and depth of the test database and achieve precise spatiotemporal correlation of electromechanical signals, effectively improving the accuracy of transient process testing.

Description

Technical Field

[0001] This invention relates to the field of wind turbine testing technology, and more specifically, to a multi-condition testing platform for wind turbines that integrates multi-source information. Background Technology

[0002] Before wind turbines are put into actual operation, they need to undergo thorough performance, reliability, and grid connection characteristic tests on a test platform. Test platforms in related technologies generally suffer from the following deficiencies in sensor monitoring: sparse and limited sensor layout, few monitoring dimensions, and low accuracy in transient process testing (such as grid fault ride-through and emergency braking). Summary of the Invention

[0003] The purpose of this invention is to provide a multi-source information fusion wind turbine multi-condition test platform, which can enrich the dimensions and depth of the test database, provide a data foundation for subsequent accurate modeling and performance optimization, and realize precise spatiotemporal correlation of electromechanical signals, thereby effectively improving the accuracy of transient process testing.

[0004] The embodiments of the present invention can be implemented as follows: In a first aspect, the present invention provides a multi-source information fusion wind turbine multi-condition test platform, comprising: a test unit, a first electrical system, a second electrical system, a mechanical state sensing device, an electrical parameter sensing device, and a data acquisition system; The tested unit includes a drive motor, a transmission system, and a generator connected in sequence. The first electrical system is electrically connected to the generator and is used to transform the electricity generated by the generator and transmit it to the power grid; The second electrical system is electrically connected to the drive motor and is used to transform and transmit the electricity transmitted from the power grid to the drive motor. The mechanical state sensing device is installed on the drive chain of the drive motor, the transmission system and up to the generator, and is used to detect the mechanical dynamic data of the transmission chain; The electrical parameter sensing device is installed on the electrical link between the first electrical system and the second electrical system, and is used to detect the electrical data of the first electrical system and the second electrical system; The data acquisition system is electrically connected to the mechanical state sensing device and the electrical parameter sensing device, respectively, for uniformly receiving the mechanical dynamic data and the electrical data, and aligning the timestamps of the mechanical dynamic data and the electrical data so that the mechanical dynamic data and the electrical data are synchronized on the time axis.

[0005] In an optional embodiment, the mechanical state sensing device includes a first vibration sensor and a first torque sensor, and the transmission system includes a gearbox; The drive motor is connected to the input shaft of the gearbox, and the gearbox is connected to the generator in a transmission connection. The first vibration sensor and the first torque sensor are disposed at the connection between the drive motor and the input shaft of the gearbox, and are used to measure the vibration data and torque data of the input shaft of the gearbox, respectively.

[0006] In an optional embodiment, the mechanical state sensing device includes a second vibration sensor and an acoustic emission sensor; the gearbox has a housing and a multi-stage gear pair disposed within the housing, the multi-stage gear pair being connected to the input shaft of the gearbox; The second vibration sensor and the acoustic emission sensor are disposed on the housing at positions corresponding to the multi-stage gear pair, and are used to detect the vibration data and meshing sound data of the gears in the multi-stage gear pair, respectively, so as to monitor the meshing state of the gears in the multi-stage gear pair and thereby realize the acoustic diagnosis of early gear failure.

[0007] In an optional embodiment, the mechanical state sensing device includes a fiber Bragg grating strain gauge, which is provided on both the input shaft of the gearbox and the housing. The fiber Bragg grating strain gauge is used to monitor the structural stress and deformation of the input shaft of the gearbox and the housing.

[0008] In an optional embodiment, the mechanical state sensing device includes a third vibration sensor and a temperature sensor, and the non-driving end of the generator has a generator bearing that cooperates with the rotor of the generator. The third vibration sensor and the temperature sensor are mounted on the generator bearing at the non-driving end of the generator to detect vibration and temperature data of the generator bearing.

[0009] In an optional embodiment, the electrical parameter sensing device includes a first voltage and current sensor; the first electrical system includes a first main transformer and a first converter, the generator, the first converter and the first main transformer are electrically connected in sequence, and the first main transformer is used to be electrically connected to the power grid; The first voltage and current sensor is installed on the DC bus of the first converter to detect the voltage and current data on the DC side of the first converter.

[0010] In an optional embodiment, the electrical parameter sensing device further includes a power quality sensor; the first electrical system further includes a filter disposed between the first converter and the first main transformer; The power quality sensor is installed on both the front and rear lines of the filter. The power quality sensor is used to compare the harmonics output by the first converter with the harmonics injected into the power grid.

[0011] In an optional embodiment, the electrical parameter sensing device further includes a second voltage and current sensor and a third voltage and current sensor. The second electrical system includes a second main transformer and a second converter. The second main transformer is electrically connected to the power grid. The second main transformer, the second converter, and the drive motor are electrically connected in sequence. The second voltage and current sensor is installed on the first main transformer to detect the voltage and current data of the first main transformer; The third voltage and current sensor is installed on the second main transformer and is used to detect the voltage and current data of the second main transformer.

[0012] The beneficial effects of the multi-source information fusion wind turbine multi-condition test platform provided in this embodiment of the invention include: The multi-source information fusion wind turbine multi-condition test platform provided in this invention can simulate the working state of a wind turbine through the tested unit. The drive motor simulates the movement of the wind turbine rotor. Mechanical dynamic data of the transmission chain is detected by mechanical state sensing devices, and electrical data of the first and second electrical systems are detected by electrical parameter sensing devices. This upgrades traditional endpoint monitoring to process-oriented panoramic monitoring, acquiring data that is traditionally impossible to observe, such as internal dynamics of the transmission chain and subtle changes in electrical links. This greatly enriches the dimension and depth of the test database, providing a data foundation for subsequent accurate modeling and performance optimization. The data acquisition system aligns the timestamps of the mechanical dynamic data and the electrical data, synchronizing them on the timeline. This transforms the acquired data from traditional isolated information into correlated information, achieving precise spatiotemporal correlation of electromechanical signals and effectively improving the accuracy of transient process tests (such as grid fault ride-through and emergency braking). Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the multi-source information fusion wind turbine multi-condition test platform provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the data acquisition system of the multi-source information fusion wind turbine multi-condition test platform provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the gearbox structure of the multi-source information fusion wind turbine multi-condition test platform provided in an embodiment of the present invention.

[0015] icon: 10-Multi-source information fusion wind turbine multi-condition test platform; 11-Power grid; 100 - Test unit; 110 - Drive motor; 120 - Transmission system; 121 - Gearbox; 1211 - Housing; 1212 - Multistage gear pair; 122 - Universal coupling; 130 - Generator; 131 - Generator bearing; 200 - First electrical system; 210 - First main transformer; 220 - First converter; 230 - Filter; 300 - Second electrical system; 310 - Second main transformer; 320 - Second converter; 400 - Mechanical state sensing device; 410 - First vibration sensor; 420 - First torque sensor; 430 - Second vibration sensor; 440 - Acoustic emission sensor; 450 - Fiber optic strain gauge; 460 - Third vibration sensor; 470 - Temperature sensor; 500 - Electrical parameter sensing device; 510 - First voltage and current sensor; 520 - Power quality sensor; 530 - Second voltage and current sensor; 540 - Third voltage and current sensor; 600 - Data Acquisition System. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0018] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0019] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0020] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0021] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0022] Please see Figures 1-3 The embodiments of the present invention provide a multi-source information fusion wind turbine multi-condition test platform 10, which can enrich the dimensions and depth of the test database, provide a data foundation for subsequent accurate modeling and performance optimization, and realize precise spatiotemporal correlation of electromechanical signals, which can effectively improve the accuracy of transient process testing.

[0023] The multi-source information fusion wind turbine multi-condition test platform 10 provided by this invention includes: a test unit 100, a first electrical system 200, a second electrical system 300, a mechanical state sensing device 400, an electrical parameter sensing device 500, and a data acquisition system 600. The test unit 100 includes a drive motor 110, a transmission system 120, and a generator 130 connected in sequence. The test unit 100 is used to simulate the working state of the wind turbine 130. The drive motor 110 is used to simulate the working state of the wind turbine rotor. The first electrical system 200 is electrically connected to the generator 130 and is used to transform the electricity generated by the generator 130 and transmit it to the power grid 11. The second electrical system 300 is electrically connected to the drive motor 110 and is used to transform the electricity transmitted from the power grid 11 and transmit it to the drive motor 110. The mechanical state sensing device 400 is disposed on the transmission chain from the drive motor 110, the transmission system 120 to the generator 130, and is used to detect the mechanical dynamic data of the transmission chain. An electrical parameter sensing device 500 is installed on the electrical link between the first electrical system 200 and the second electrical system 300 to detect electrical data from both systems. A data acquisition system 600 is electrically connected to both the mechanical state sensing device 400 and the electrical parameter sensing device 500 to uniformly receive mechanical dynamic data and electrical data, and to align the timestamps of the mechanical dynamic data and electrical data to synchronize them on the timeline. The data acquisition system 600 can be optionally a data acquisition device with high-precision clock synchronization capabilities (such as the IEEE 1588 protocol).

[0024] The multi-source information fusion wind turbine multi-condition test platform 10 provided in this embodiment of the invention can simulate the working state of the wind turbine 130 through the tested unit unit 100, wherein the drive motor 110 can simulate the movement of the wind turbine. The mechanical dynamic data of the transmission chain is detected by the mechanical state sensing device 400, and the electrical data of the first electrical system 200 and the second electrical system 300 are detected by the electrical parameter sensing device 500. In this way, it can upgrade from traditional endpoint monitoring to process-oriented panoramic monitoring, and can acquire data that cannot be observed by the traditional "black box", such as the internal dynamics of the transmission chain and the subtle changes of the electrical links. This greatly enriches the dimension and depth of the test database and provides a data foundation for subsequent accurate modeling and performance optimization. The data acquisition system 600 aligns the timestamps of the mechanical dynamic data and the electrical data to synchronize the mechanical dynamic data and the electrical data on the time axis. In this way, the acquired data changes from traditional isolated information to correlated information, realizing the precise spatiotemporal correlation of electromechanical signals, which can effectively improve the accuracy of transient process (such as grid 11 fault ride-through, emergency braking) testing.

[0025] In an optional embodiment, the mechanical state sensing device 400 includes a first vibration sensor 410 and a first torque sensor 420, and the transmission system 120 includes a gearbox 121. A drive motor 110 is connected to the input shaft of the gearbox 121, and the gearbox 121 is connected to a generator 130. The first vibration sensor 410 and the first torque sensor 420 are disposed at the connection between the drive motor 110 and the input shaft of the gearbox 121, and are used to measure the vibration data and torque data of the input shaft of the gearbox 121, respectively.

[0026] By setting the first vibration sensor 410 and the first torque sensor 420, the vibration data and torque data of the input shaft of the gearbox 121 can be measured, thereby accurately measuring the input mechanical power and the torsional vibration at the beginning of the transmission chain.

[0027] In addition, the transmission system 120 may also include a universal coupling 122, through which the gearbox 121 is connected to the generator 130.

[0028] In an optional embodiment, the mechanical state sensing device 400 includes a second vibration sensor 430 and an acoustic emission sensor 440; the gearbox 121 has a housing 1211 and a multi-stage gear pair 1212 disposed within the housing 1211, the multi-stage gear pair 1212 being connected to the input shaft of the gearbox 121. The second vibration sensor 430 and the acoustic emission sensor 440 are disposed in the housing 1211 at positions corresponding to the multi-stage gear pair 1212, and are used to detect the vibration data and meshing sound data of the gears in the multi-stage gear pair 1212, respectively, to monitor the gear meshing state of the multi-stage gear pair 1212, thereby realizing acoustic diagnosis of early gear failures.

[0029] By setting a second vibration sensor 430 and an acoustic emission sensor 440, the vibration data and meshing sound data of the gears in the multi-stage gear pair 1212 can be detected, thereby monitoring the gear meshing state and realizing acoustic diagnosis of early faults such as gear pitting and tooth breakage.

[0030] In an optional embodiment, the mechanical state sensing device 400 includes a fiber optic strain gauge 450. The fiber optic strain gauge 450 is provided on both the input shaft of the gearbox 121 and the housing 1211. The fiber optic strain gauge 450 is used to monitor the structural stress and deformation of the input shaft of the gearbox 121 and the housing 1211.

[0031] By setting up fiber optic strain gauges 450, the structural stress and deformation of the input shaft and housing 1211 of the gearbox 121 can be monitored.

[0032] In an optional embodiment, the mechanical state sensing device 400 includes a third vibration sensor 460 and a temperature sensor 470. The non-drive end of the generator 130 has a generator bearing 131, which engages with the rotor of the generator 130. The third vibration sensor 460 and the temperature sensor 470 are disposed on the generator bearing 131 at the non-drive end of the generator 130 and are used to detect vibration data and temperature data of the generator bearing 131.

[0033] By setting a third vibration sensor 460 and a temperature sensor 470, vibration data and temperature data of the generator bearing 131 can be detected, thereby monitoring the condition of the generator bearing 131. In subsequent processing, it can be combined with electrical signals to diagnose electromechanical coupling faults such as rotor eccentricity.

[0034] In an optional embodiment, the electrical parameter sensing device 500 includes a first voltage and current sensor 510; the first electrical system 200 includes a first main transformer 210 and a first converter 220, with the generator 130, the first converter 220, and the first main transformer 210 sequentially electrically connected, and the first main transformer 210 used for electrical connection to the power grid 11. The first voltage and current sensor 510 is disposed on the DC bus of the first converter 220 and is used to detect the voltage and current data on the DC side of the first converter 220.

[0035] By setting the first voltage and current sensor 510, the voltage and current data on the DC side of the first converter 220 can be detected, thereby monitoring the power fluctuation and supporting capacitor status on the DC side of the first converter 220 and evaluating the dynamic performance of the first converter 220 during low voltage ride-through.

[0036] In an optional embodiment, the electrical parameter sensing device 500 further includes a power quality sensor 520; the first electrical system 200 also includes a filter 230, which is disposed between the first converter 220 and the first main transformer 210. Power quality sensors 520 are disposed on both the lines before and after the filter 230, and the power quality sensors 520 are used to compare the harmonics output by the first converter 220 with the harmonics injected into the power grid 11.

[0037] By setting up a power quality sensor 520, the harmonics output by the first converter 220 can be compared with the harmonics injected into the power grid 11, thereby accurately evaluating the filtering effect.

[0038] In an optional embodiment, the electrical parameter sensing device 500 further includes a second voltage and current sensor 530 and a third voltage and current sensor 540. The second electrical system 300 includes a second main transformer 310 and a second converter 320. The second main transformer 310 is electrically connected to the power grid 11, and the second main transformer 310, the second converter 320, and the drive motor 110 are sequentially electrically connected. The second voltage and current sensor 530 is disposed on the first main transformer 210 and is used to detect the voltage and current data of the first main transformer 210. The third voltage and current sensor 540 is disposed on the second main transformer 310 and is used to detect the voltage and current data of the second main transformer 310.

[0039] Optionally, the second voltage and current sensor 530 and the third voltage and current sensor 540 are wideband voltage and current sensors. By setting the second voltage and current sensor 530 and the third voltage and current sensor 540, the voltage and current data of the first main transformer 210 and the second main transformer 310 can be detected, thereby applying the data to grid connection characteristic tests under multiple operating conditions, power quality assessments, and grid fault simulation tests.

[0040] It should be noted that all sensor signals mentioned in the embodiments of the present invention are acquired under a unified time base. This enables high-precision time synchronization and multi-physical quantity fusion data acquisition covering key nodes of multiple mechanical and electrical paths from the drive end to the power grid 11 end.

[0041] The multi-source information fusion wind turbine multi-condition test platform 10 provided in this embodiment of the invention can simulate the working state of wind turbine 130 through the tested unit unit 100, wherein the drive motor 110 can simulate the movement of the wind turbine. The mechanical dynamic data of the transmission chain is detected by the mechanical state sensing device 400, and the electrical data of the first electrical system 200 and the second electrical system 300 are detected by the electrical parameter sensing device 500. In this way, it can upgrade from traditional endpoint monitoring to process-oriented panoramic monitoring, and can acquire data that cannot be observed by the traditional "black box", such as the internal dynamics of the transmission chain and the subtle changes of the electrical links. This greatly enriches the dimension and depth of the test database and provides a data foundation for subsequent accurate modeling and performance optimization. The timestamps of the mechanical dynamic data and the electrical data are aligned by the data acquisition system 600 so that the mechanical dynamic data and the electrical data are synchronized on the time axis. In this way, the acquired data is transformed from traditional isolated information into correlated information, realizing the precise spatiotemporal correlation of electromechanical signals, which can effectively improve the accuracy of transient process (such as grid 11 fault ride-through, emergency braking) testing. Furthermore, it enables the testing platform to expand its role from the traditional "inspector" to "diagnostic doctor" and "prophet," that is, to discover potential defects in components in the early stages of the testing phase, locate design weaknesses, and predict the fatigue life of key components, thereby significantly shortening the product development iteration cycle, improving the reliability of the units leaving the factory, and reducing the risk of on-site failures.

[0042] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-source information fusion wind turbine multi-condition test platform, characterized in that, include: The tested unit, the first electrical system, the second electrical system, the mechanical state sensing device, the electrical parameter sensing device, and the data acquisition system; The tested unit includes a drive motor, a transmission system, and a generator connected in sequence. The first electrical system is electrically connected to the generator and is used to transform the electricity generated by the generator and transmit it to the power grid; The second electrical system is electrically connected to the drive motor and is used to transform and transmit the electricity transmitted from the power grid to the drive motor. The mechanical state sensing device is installed on the drive chain of the drive motor, the transmission system and up to the generator, and is used to detect the mechanical dynamic data of the transmission chain; The electrical parameter sensing device is installed on the electrical link between the first electrical system and the second electrical system, and is used to detect the electrical data of the first electrical system and the second electrical system; The data acquisition system is electrically connected to the mechanical state sensing device and the electrical parameter sensing device, respectively, and is used to uniformly receive the mechanical dynamic data and the electrical data, and align the timestamps of the mechanical dynamic data and the electrical data so that the mechanical dynamic data and the electrical data are synchronized on the time axis.

2. The multi-source information fusion wind turbine multi-condition test platform according to claim 1, characterized in that, The mechanical state sensing device includes a first vibration sensor and a first torque sensor, and the transmission system includes a gearbox; The drive motor is connected to the input shaft of the gearbox, and the gearbox is connected to the generator in a transmission connection. The first vibration sensor and the first torque sensor are disposed at the connection between the drive motor and the input shaft of the gearbox, and are used to measure the vibration data and torque data of the input shaft of the gearbox, respectively.

3. The multi-source information fusion wind turbine multi-condition test platform according to claim 2, characterized in that, The mechanical state sensing device includes a second vibration sensor and an acoustic emission sensor; the gearbox has a housing and a multi-stage gear pair disposed within the housing, the multi-stage gear pair being connected to the input shaft of the gearbox; The second vibration sensor and the acoustic emission sensor are disposed on the housing at positions corresponding to the multi-stage gear pair, and are used to detect the vibration data and meshing sound data of the gears in the multi-stage gear pair, respectively, so as to monitor the meshing state of the gears in the multi-stage gear pair and thereby realize the acoustic diagnosis of early gear failure.

4. The multi-source information fusion wind turbine multi-condition test platform according to claim 3, characterized in that, The mechanical state sensing device includes fiber Bragg grating strain gauges. The fiber Bragg grating strain gauges are installed on both the input shaft of the gearbox and the housing. The fiber Bragg grating strain gauges are used to monitor the structural stress and deformation of the input shaft of the gearbox and the housing.

5. The multi-source information fusion wind turbine multi-condition test platform according to claim 1, characterized in that, The mechanical state sensing device includes a third vibration sensor and a temperature sensor. The non-driving end of the generator has a generator bearing, which cooperates with the rotor of the generator. The third vibration sensor and the temperature sensor are mounted on the generator bearing at the non-driving end of the generator to detect vibration and temperature data of the generator bearing.

6. The multi-source information fusion wind turbine multi-condition test platform according to claim 1, characterized in that, The electrical parameter sensing device includes a first voltage and current sensor; the first electrical system includes a first main transformer and a first converter, the generator, the first converter and the first main transformer are electrically connected in sequence, and the first main transformer is used to be electrically connected to the power grid. The first voltage and current sensor is installed on the DC bus of the first converter to detect the voltage and current data on the DC side of the first converter.

7. The multi-source information fusion wind turbine multi-condition test platform according to claim 6, characterized in that, The electrical parameter sensing device further includes a power quality sensor; the first electrical system further includes a filter, which is disposed between the first converter and the first main transformer; The power quality sensor is installed on both the front and rear lines of the filter. The power quality sensor is used to compare the harmonics output by the first converter with the harmonics injected into the power grid.

8. The multi-source information fusion wind turbine multi-condition test platform according to claim 6, characterized in that, The electrical parameter sensing device further includes a second voltage and current sensor and a third voltage and current sensor. The second electrical system includes a second main transformer and a second converter. The second main transformer is electrically connected to the power grid. The second main transformer, the second converter, and the drive motor are electrically connected in sequence. The second voltage and current sensor is installed on the first main transformer to detect the voltage and current data of the first main transformer; The third voltage and current sensor is installed on the second main transformer and is used to detect the voltage and current data of the second main transformer.

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