Large-scale model testing system of floating offshore wind power generation device and method for manufacturing testing system

Patent metadata

Field	Value
Publication number	US-12018646-B2
Application number	US-202117308004-A
Country	US
Kind code	B2
Filing date	May 4, 2021
Priority date	Oct 28, 2020
Publication date	Jun 25, 2024
Grant date	Jun 25, 2024

Abstract

The present invention discloses a large-scale model testing system of a floating offshore wind power generation device, and a method for manufacturing the large-scale model testing system. The large-scale model testing system comprises a floating wind power generation device model, model response measurement systems and environmental parameter measurement systems. The floating wind power generation device model comprises a floating foundation and a tower, wherein a wind turbine is connected to the top of the tower. A plurality of anchoring devices is connected to the side surface of the floating foundation. Each model response measurement system comprises an IMU unit, a wind turbine monitoring unit and an anchoring tension measurement unit. Each environmental parameter measurement system comprises a buoy-type wave height meter, a wind speed and direction meter and a flow velocity and direction meter.

First claim

What is claimed is:

1. A large-scale model testing system of a floating offshore wind power generation device, comprising:
a floating wind power generation device model, model response measurement systems and environmental parameter measurement systems, wherein the floating wind power generation device model comprises a floating foundation ( 1 ); the floating foundation ( 1 ) comprises pile legs ( 16 ), and a support ( 17 ) is connected between the pile legs ( 16 ); a tower ( 2 ) is connected to a center of an upper surface of the floating foundation ( 1 ), and has a diameter that gradually decreases from a bottom end to a top end; a wind turbine ( 3 ) is connected to a top of the tower ( 2 ); a plurality of anchoring devices ( 4 ) is connected to a side surface of the floating foundation ( 1 ); each anchoring device ( 4 ) comprises anchor chains ( 5 ) that are connected to the floating foundation ( 1 ), and a plurality of anchor blocks ( 6 ) connected to the respective anchor chains ( 5 ); each model response measurement system comprises an Inertial measurement unit (IMU) ( 7 ), a wind turbine monitoring unit ( 8 ) and an anchoring tension measurement unit ( 9 );
a method for manufacturing the large-scale model testing system of a floating offshore wind power generation device comprising the following steps:
S1, determining a scale ratio of the floating wind power generation device model according to a law of similarity in Froude number: firstly, comprehensively determining a scale ratio of the floating foundation ( 1 ) and the tower ( 2 ) according to test requirements, production cost, and repeatability of wind and wave environments; then, manufacturing the floating foundation ( 1 ) and the tower ( 2 ) from steel; scaling external profiles of the floating foundation ( 1 ) and the tower ( 2 ) as same as those of a real-scale device according to the scale ratio;
S2, performing design and type selection on the wind turbine according to a principle of equivalent similarity of wind thrust: determining a geometrical scale ratio of a wind turbine ( 3 ) model through wave height-wave period distribution parameters of a real scale and a model scale and corresponding relationships between wind velocities and wave levels; appropriately correcting geometric shapes of model blades to ensure that a horizontal thrust of the wind turbine ( 3 ) model on the upper connection of the tower ( 2 ) and a thrust of a wind turbine ( 3 ) in the real-scale device on the fixed end of the tower ( 2 ) meet a Froude number similarity condition, wherein the geometrical scale ratio of the wind turbine ( 3 ) model can be different from the scale ratio of the floating foundation ( 1 );
S3, selecting a sea area location of a large-scale model test in conjunction with a selected model scale ratio, wherein the selection process is as follows:
a. collecting sea condition information of a working sea area of a real-scale floating offshore wind power generation device to be simulated, and calculating sea condition information required for a test of a model device according to a law of similarity;
b. calculating the law of similarity:

H
m

=

H
p

⁢

/

⁢
λ

;

T
m

=

T
p

⁢

/

⁢

λ

;

wherein, H is a significant wave height, T is a characteristic period, and λ is a scale ratio; the subscripts p and m represent a real scale and a model scale respectively;
c. selecting a sea area under test that meets the law of similarity according to long-term statistical data of sea waves in the sea area under test and a principle of maximum repeatability, by means of comprehensive consideration of sea area location, climate season, weather conditions, offshore distance and test time;
S4, setting the manufactured floating wind power generation device model in the sea area under test, and fixing it with the anchoring devices ( 4 ); determining lengths and a fixing method of the anchor chains ( 5 ) according to the water depths of the sea area under test, collecting force conditions of the anchoring devices ( 4 ) through the anchoring tension measurement unit ( 9 ), and ensuring that the force conditions of the anchoring systems on the model scale and the real scale satisfy the Froude number similarity condition; and
S5, deploying a plurality of environmental parameter measurement systems in a sea area at a certain distance from the floating wind power generation device model; transmitting measurement signals of the respective sensors in the model response measurement systems and the environmental parameter measurement systems to a shore-side data acquisition instrument in real time through a radio signal transmission device for storage.

2. The large-scale model testing system of the floating offshore wind power generation device according to claim 1 , wherein the IMU ( 7 ) is fixed on a lower part of a side surface of the tower ( 2 ); the wind turbine monitoring unit ( 8 ) is connected to a tail of the wind turbine ( 3 ); and the wind turbine monitoring unit ( 8 ) comprises power and rotational speed monitoring modules ( 81 ) and torque and thrust sensors ( 82 ).

3. The large-scale model testing system of the floating offshore wind power generation device according to claim 1 , wherein the anchoring tension measurement unit ( 9 ) is connected to a side surface of the floating foundation ( 1 ), and one end of each anchor chain ( 5 ) is connected to the anchoring tension measurement unit ( 9 ).

4. The large-scale model testing system of the floating offshore wind power generation device according to claim 1 , wherein each environmental parameter measurement system comprises a wave height meter ( 10 ), wherein a wind speed and direction meter ( 11 ) is connected to a upper side of the wave height meter ( 10 ); a flow velocity and direction meter ( 12 ) is connected to a lower side of the wave height meter ( 10 ), and located below a liquid level; and a plurality of environmental parameter measurement systems is arranged around the floating foundation ( 1 ).

5. The large-scale model testing system of the floating offshore wind power generation device according to claim 4 , wherein an instrument mooring device ( 15 ) is connected to the lower side of the wave height meter ( 10 ), the instrument mooring device ( 15 ) comprising an anchor ( 18 ) and a connecting rod ( 19 ), wherein one end of the connecting rod ( 19 ) is connected to the bottom of the wave height meter ( 10 ), and the flow velocity and direction meter ( 12 ) is fixed on the connecting rod ( 19 ).

6. The large-scale model testing system of the floating offshore wind power generation device according to claim 1 , wherein a capacitive height wave meter ( 13 ) is connected to the edge of each pile leg ( 16 ) of the floating foundation ( 1 ).

7. The large-scale model testing system of the floating offshore wind power

Assignees

• Three Gorges Zhujiang Power Generation Co Ltd
• Univ South China Tech

Inventors

• Chen Chaohe
• Jiao Jialong
• Liu Aihua
• Lin Yifeng
• Wu Qiren
• Liu Yunzhi
• Chen Xinqun
• Liu Taiping
• Liu Junfeng
• Liu Jianping
• Wang Zhongliang
• Wang Wei
• Xu Yuan
• Xue Yangyang
• Lin Chengdi
• Li Binqi
• Xiong Renshu
• Xu Xinxin
• Ni Daojun
• Li Yajing
• Liu Zhaoqing
• Zhou Lili
• Chen Pengfei
• Fan Tianhui

Classifications

• G01M9/08

  Aerodynamic models · CPC title

• F05B2260/84

  Modelling or simulation · CPC title

• F05B2260/83

  Testing, e.g. methods, components or tools therefor · CPC title

• B63B2035/446

  for converting wind energy into electric energy · CPC title

• B63B79/15

  for monitoring environmental variables, e.g. wave height or weather data · CPC title