CFD Analysis of the Mechanical Power and the Wake of a Scaled Wind Turbine and Its Experimental Validation

Abstract The scope of this work is to investigate if and how it is possible to estimate the incident wave elevation on a floating wind turbine, with the purpose of improved control strategies. A Kalman based algorithm is proposed, which receives as input the rigid motions of the floater and estimates the wave elevation hitting the floating platform. The structure of the observer is described and the estimator is tested numerically on the OC3-Hywind platform coupled with the 5-MW reference wind turbine from NREL. Limitations to the estimation procedure are discussed. Finally the algorithm is tested on experimental data coming from a wave basin experimental campaign on a floating wind turbine model. The algorithm still needs improvements, but results are encouraging in the development of this technology.

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Mechanical Power Calculation of Wind Turbine in Mountainous Wind Farm Model Utilizing Variation Coefficient of Wind Speed

2019 IEEE Sustainable Power and Energy Conference (iSPEC) ◽

10.1109/ispec48194.2019.8975019 ◽

2019 ◽

Author(s):

Song Han ◽

Dunhou Yao ◽

Wenbing Wei

Keyword(s):

Wind Speed ◽

Wind Turbine ◽

Wind Farm ◽

Variation Coefficient ◽

Mechanical Power ◽

Power Calculation ◽

Farm Model

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Design of a Mechanical Power Circulation Test Rig for a Wind Turbine Gearbox

Applied Sciences ◽

10.3390/app10093240 ◽

2020 ◽

Vol 10 (9) ◽

pp. 3240

Author(s):

Geun-Ho Lee ◽

Young-Jun Park ◽

Ju-Seok Nam ◽

Joo-Young Oh ◽

Jeong-Gil Kim

Keyword(s):

Control System ◽

Wind Turbine ◽

Mechanical Power ◽

Hydraulic Control ◽

Test Rig ◽

Wind Turbine Gearbox ◽

Planetary Gearbox ◽

Bearing Life ◽

And Control ◽

Hydraulic Control System

We developed a mechanical power circulation test rig for a wind turbine gearbox with a power rating of 5.8 MW or less. The test rig consists of an electric motor, two auxiliary gearboxes, a torque-applying device, lubrication systems, cooling systems, and control systems. The torque generating device consists of a planetary gearbox and a hydraulic control system and is used to apply the desired torque to the test gearbox. The hydraulic control system applies the torque on the ring gear of the planetary gearbox. The gears and bearings of the two auxiliary gearboxes and planetary gearboxes met the design criteria for a safety factor of over 1.2 and a bearing life of 30,000 h. In addition, the master and slave gearboxes were connected to the test rig to verify whether the torque-applying device had applied variable torque in real-time during the test. The device was only able to induce a variable torque of up to 45.2 kN-m due to the limitation of the rated torque of the master and slave gearboxes. The test rig can test not only efficiency, vibration, and noise but also durability and overloading.

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Designing and Basic Experimental Validation of the World's First MW-Class Direct-Drive Superconducting Wind Turbine Generator

IEEE Transactions on Energy Conversion ◽

10.1109/tec.2019.2927307 ◽

2019 ◽

Vol 34 (4) ◽

pp. 2218-2225 ◽

Cited By ~ 20

Author(s):

Xiaowei Song ◽

Anne Bergen ◽

Tiemo Winkler ◽

Sander Wessel ◽

Marcel ter Brake ◽

...

Keyword(s):

Wind Turbine ◽

Experimental Validation ◽

Direct Drive ◽

Turbine Generator ◽

Wind Turbine Generator

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Heuristic Coupling Design-Optimization between a Variable Speed Generator and a Wind Rotor

International Journal of Engineering Research in Africa ◽

10.4028/www.scientific.net/jera.32.133 ◽

2017 ◽

Vol 32 ◽

pp. 133-138

Author(s):

Cherif Khelifi ◽

Fateh Ferroudji ◽

Farouk Meguellati ◽

Khaled Koussa

Keyword(s):

Wind Turbine ◽

Output Power ◽

Wind Turbines ◽

Electricity Market ◽

Maximum Output Power ◽

Vertical Axis ◽

Mechanical Power ◽

Maximum Output ◽

Variable Speed ◽

Electric Generator

A high emergence of wind energy into the electricity market needs a parallel efficient advance of wind power forecasting models. Determining optimal specific speed and drive-train ratio is crucial to describe, comprehend and optimize the coupling design between a wind turbine-rotor and an electric generator (EG) to capture maximum output power from the wind. The selection of the specific design speed to drive a generator is limited. It varies from (1-4) for vertical axis wind turbines and (6-8) for horizontal axis wind turbines. Typically, the solution is an iterative procedure, for selecting the adequate multiplier ratio giving the output power curve. The latter must be relatively appreciated to inlet and nominal rated wind speeds. However, instead of this tedious and costly method, in the present paper we are developing a novel heuristic coupling approach, which is economical, easy to describe and applicable for all types of variable speed wind turbines (VSWTs). The principle method is based on the fact that the mechanical power needed of the wind turbine (WT) to drive the EG must be permanently closer to the maximum mechanical power generated by the (WT).

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