Results 11 to 20 of about 285,442 (311)

Robust Model Predictive Control for Collective Pitch in Wind Energy Conversion Systems

IFAC-PapersOnLine, 2017
Abstract When wind speeds exceed the rated values, wind turbines operate in region 3. In region 3, collective pitch control (CPC) is the main tool to regulate the turbine’s speed and generated power. The main challenges that face a CPC design are the modeling uncertainties, constraints on the control actions, and immeasurable system states.
Ahmed Lasheen, Mohamed. S. Saad, Hassan M. Emara, Abdel Latif Elshafei   +3 more
semanticscholar   +4 more sources

Collective Pitch Control with Active Tower Damping of a Wind Turbine by Using a Nonlinear PID Approach

IFAC-PapersOnLine, 2018
Abstract The present work describes the results obtained from a nonlinear PID control (NPID) approach for the pitch control with top tower active damping of a large wind turbine. The control algorithm is implemented by using a well-known approach based on hyperbolic secant functions.
Adrian Gambier, Yul Yunazwin Nazaruddin
semanticscholar   +4 more sources

A model reference adaptive control framework for floating offshore wind turbines with collective and individual blade pitch strategy

Ocean Engineering
Yarong Zhou, Parijat Bhowmick, Lijun Zhang, Li Chen, Ryozo Nagamune, Ye Li   +5 more
semanticscholar   +4 more sources

Field Testing of Feedforward Collective Pitch Control on the CART2 Using a Nacelle-Based Lidar Scanner

Journal of Physics: Conference Series, 2014
This work presents the first results from a field test to proof the concept of LIDAR assisted collective pitch control using a scanning LIDAR device installed on the nacelle of a research turbine. The purpose of the campaign was to show that a reduction of rotor speed variation is feasible with a feedforward update without changing the feedback ...
Schlipf, David, Fleming, Paul, Haizmann, Florian, Scholbrock, Andrew, Hofsäß, Martin, Wright, Alan, Cheng, Po Wen   +6 more
openaire   +2 more sources

A robust gain scheduling method for a PI collective pitch controller of multi-MW onshore wind turbines

Renewable Energy, 2022
This work proposes a robust tuning method for full-load pitch control by deriving new design formulae for collective Proportional Integral (PI) pitch controllers. The paper investigates the frequency domain characteristics of a full state linearized turbine model extracted from the aeroelastic simulation tool HawcStab2, and suggests a reduced order ...
Qusay Hawari, Taeseong Kim, Christopher Ward, James Fleming   +3 more
openaire   +4 more sources

LIDAR assisted collective pitch control

, 2011
Nacelle based pulsed LIDAR (Light detection and ranging) systems provide preview information of wind disturbances at various distances in front of wind turbines. In previous work it has been shown that this information can be used to improve the speed regulation of wind turbines by a look-ahead update to the collective pitch control, which indicates ...
Schlipf, David, Bossanyi, Ervin, Carcangiu, Carlo Enrico, Fischer, Tim, Maul, Timo, Rossetti, Michele   +5 more
openaire   +4 more sources

The Impact of LIDAR‐Assisted Pitch Control on Floating Offshore Wind Operational Expenditure

Wind Energy
Floating offshore wind (FOW) is a renewable energy source that is set to play an essential role in addressing climate change and the need for sustainable development.
Andrew J. Russell, Jade McMorland, Maurizio Collu, Alasdair S. McDonald, Philipp R. Thies, Aidan Keane, Alexander R. Quayle, David McMillan, James Carroll, Andrea Coraddu   +9 more
doaj   +2 more sources

Study on load reduction and vibration control strategies for semi-submersible offshore wind turbines [PDF]

Scientific Reports
Independent pitch control (IPC) is a crucial technology for enhancing the performance of wind turbines, optimizing the power output, and reducing the loads by managing each blade.
Dongxiao Bai, Bing Wang, Yinsheng Li, Wancheng Wang   +3 more
doaj   +2 more sources

Load analysis of look-ahead collective pitch control using LIDAR

, 2010
In a detailed analysis the benefit of LIDAR assisted collective pitch control is evaluated, by using a realistic LIDAR simulator and comparing it to an advanced feedback controller. With the proposed look-ahead controller best load reduction can be observed for high turbulence and high wind speed. Damage equivalent loads on tower and blades are reduced
Schlipf, David, Fischer, Tim, Carcangiu, Carlo Enrico, Rossetti, Michele, Bossanyi, Ervin   +4 more
openaire   +3 more sources

An investigation of variable power collective pitch control for load mitigation of floating offshore wind turbines

Wind Energy, 2012
ABSTRACTThis paper investigates the loads on offshore floating wind turbines and a new control method that can be used to reduce these loads. In this variable power collective pitch control method, the rated generator speed, which is the set point that the collective pitch control attempts to drive the actual generator speed towards, is no longer a ...
M. Lackner
openaire   +2 more sources