scholarly journals Comparing State-Space Multivariable Controls to Multi-SISO Controls for Load Reduction of Drivetrain-Coupled Modes on Wind Turbines through Field-Testing

2012 ◽  
Author(s):  
Paul Fleming ◽  
Jan-Willem Wingerden ◽  
Alan Wright
Keyword(s):  
State Space ◽  
Wind Turbines ◽  
Field Testing ◽  
Load Reduction ◽  
Coupled Modes

Development and Field Testing of an Inclined Flanged Compact Diffuser for a Micro Wind Turbine

2014 ◽  
Author(s):  
Sandip Kale ◽  
S. N. Sapali
Keyword(s):  
Wind Turbine ◽  
Wind Velocity ◽  
Wind Turbines ◽  
Energy Production ◽  
Cost Effective ◽  
Field Testing ◽  
International Electrotechnical Commission ◽  
Average Wind Speed ◽  
Average Wind ◽  
Power Curves

Micro wind turbines installed in various applications, experience average wind speed for most of the time during operations. Power produced by the wind turbine is proportional to the cubic power of the wind velocity and a small increase in wind velocity results increases power output significantly. The approach wind velocity can be increased by covering traditional wind turbine with a diffuser. Researchers are continuously working to develop a compact, lightweight, cost effective and feasible diffuser for wind turbines. The present work carried out to develop a diffuser with these stated objectives. A compact, lightweight inclined flanged diffuser developed for a micro wind turbine. Bare micro wind turbine and wind turbine covered with developed efficient inclined flanged diffuser tested in the field as per International Electrotechnical Commission (IEC) standards and results presented in the form of power curves. The prediction of annual energy production for both wind turbines determined as per IEC standards.

Control of MW-Scale Wind Turbines for Fatigue Load Reduction and Performance Improvement

2018 ◽  
Vol 6 (3) ◽  
pp. 227-238
Author(s):  
Xin Jin ◽  
Shuangyi Xie ◽  
Hua Liu ◽  
Dazhou Zheng ◽  
Dong Zeng ◽  
...  
Keyword(s):  
Performance Improvement ◽  
Wind Turbines ◽  
Load Reduction ◽  
Fatigue Load ◽  
And Performance

scholarly journals Design of Robust Controllers for Load Reduction in Wind Turbines

2014 ◽  
pp. 97-133 ◽  
Author(s):  
Asier Díaz de Corcuera ◽  
Aron Pujana-Arrese ◽  
Jose M. Ezquerra ◽  
Aitor Milo ◽  
Joseba Landaluze
Keyword(s):  
Wind Turbines ◽  
Load Reduction ◽  
Robust Controllers

Individual Pitch Control for Wind Turbine Load Reduction Enhanced With Inter-Turbine Wake Modelling

2011 ◽  
Author(s):  
Zhongzhou Yang ◽  
Yaoyu Li ◽  
John E. Seem
Keyword(s):  
Wind Turbine ◽  
State Space ◽  
Wind Profile ◽  
State Space Models ◽  
Load Reduction ◽  
Pitch Control ◽  
Wake Interaction ◽  
Wake Model ◽  
Individual Pitch Control ◽  
Turbine Wake

Individual pitch control (IPC) for wind turbine load reduction in Region 3 operation is improved when wake interaction is considered. The Larsen wake model is applied for composing the rotor wind profile for downstream turbines under wake interaction. The wind profile of the turbine wake was generated by modifying the NREL’s TurbSim codes. The state-space models of wind turbine were obtained via linearization of wind turbine model available in the NREL’s aeroelastic design code FAST. In particular, in order to obtain more accurate state-space models, equivalent circular wind profile was generated so as to better determine the local pitch reference. Based on such models, IPC controllers were designed following the disturbance accommodating control (DAC) and periodic control framework. The simulation results showed that the turbine loads can be further reduced using the switching control scheme based on wake modeling, as compared with the generic DAC without wake consideration.

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