Large-eddy simulations with extremum-seeking control for individual wind turbine power optimization

Wind Energy ◽  
2017 ◽  
Vol 20 (9) ◽  
pp. 1617-1634 ◽  
Author(s):  
Umberto Ciri ◽  
Mario Rotea ◽  
Christian Santoni ◽  
Stefano Leonardi
Keyword(s):  
Wind Turbine ◽  
Power Optimization ◽  
Large Eddy Simulations ◽  
Extremum Seeking ◽  
Extremum Seeking Control ◽  
Large Eddy

scholarly journals Wake meandering statistics of a model wind turbine: Insights gained by large eddy simulations

2016 ◽  
Vol 1 (4) ◽  
Author(s):  
Daniel Foti ◽  
Xiaolei Yang ◽  
Michele Guala ◽  
Fotis Sotiropoulos
Keyword(s):  
Wind Turbine ◽  
Large Eddy Simulations ◽  
Large Eddy

Real-Time Optimization of Wind Farm Energy Capture With Delay Compensated Nested-Loop Extremum Seeking Control

2017 ◽  
Author(s):  
Zhongyou Wu ◽  
Yaoyu Li
Keyword(s):  
Wind Turbine ◽  
Real Time ◽  
Wind Farm ◽  
Optimization Techniques ◽  
Extremum Seeking ◽  
Extremum Seeking Control ◽  
Energy Capture ◽  
Time Optimization ◽  
Real Time Optimization ◽  
Nested Loop

Real-time optimization of wind farm energy capture for below rated wind speed is critical for reducing the levelized cost of energy (LCOE). Performance of model based control and optimization techniques can be significantly limited by the difficulty in obtaining accurate turbine and farm models in field operation, as well as the prohibitive cost for accurate wind measurements. The Nested-Loop Extremum Seeking Control (NLESC), recently proposed as a model free method has demonstrated its great potential in wind farm energy capture optimization. However, a major limitation of previous work is the slow convergence, for which a primary cause is the low dither frequencies used by upwind turbines, primarily due to wake propagation delay through the turbine array. In this study, NLESC is enhanced with the predictor based delay compensation proposed by Oliveira and Krstic [1], which allows the use of higher dither frequencies for upwind turbines. The convergence speed can thus be improved, increasing the energy capture consequently. Simulation study is performed for a cascaded three-turbine array using the SimWindFarm platform. Simulation results show the improved energy capture of the wind turbine array under smooth and turbulent wind conditions, even up to 10% turbulence intensity. The impact of the proposed optimization methods on the fatigue loads of wind turbine structures is also evaluated.

scholarly journals Large eddy simulations of offshore wind turbine wakes for two floating platform types

2020 ◽  
Vol 1452 ◽  
pp. 012034
Author(s):  
H M Johlas ◽  
L A Martínez-Tossas ◽  
M A Lackner ◽  
D P Schmidt ◽  
M J Churchfield
Keyword(s):  
Wind Turbine ◽  
Large Eddy Simulations ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Floating Platform ◽  
Large Eddy

A simple atmospheric boundary layer model applied to large eddy simulations of wind turbine wakes

Wind Energy ◽  
2013 ◽  
Vol 17 (4) ◽  
pp. 657-669 ◽  
Author(s):  
Niels Troldborg ◽  
Jens N. Sørensen ◽  
Robert Mikkelsen ◽  
Niels N. Sørensen
Keyword(s):  
Boundary Layer ◽  
Atmospheric Boundary Layer ◽  
Wind Turbine ◽  
Large Eddy Simulations ◽  
Layer Model ◽  
Boundary Layer Model ◽  
Large Eddy

Synthetic atmospheric turbulence and wind shear in large eddy simulations of wind turbine wakes

Wind Energy ◽  
2013 ◽  
Vol 17 (8) ◽  
pp. 1247-1267 ◽  
Author(s):  
Rolf-Erik Keck ◽  
Robert Mikkelsen ◽  
Niels Troldborg ◽  
Martin de Maré ◽  
Kurt S. Hansen
Keyword(s):  
Wind Turbine ◽  
Atmospheric Turbulence ◽  
Wind Shear ◽  
Large Eddy Simulations ◽  
Large Eddy

scholarly journals Wind turbine wakes in forest and neutral plane wall boundary layer large-eddy simulations

2016 ◽  
Vol 753 ◽  
pp. 032058 ◽  
Author(s):  
Josef Schröttle ◽  
Zbigniew Piotrowski ◽  
Thomas Gerz ◽  
Antonia Englberger ◽  
Andreas Dörnbrack
Keyword(s):  
Boundary Layer ◽  
Wind Turbine ◽  
Large Eddy Simulations ◽  
Plane Wall ◽  
Neutral Plane ◽  
Wall Boundary Layer ◽  
Wall Boundary ◽  
Large Eddy
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