TY - GEN
T1 - Individual Pitch Control with a Reduced Actuator Duty Cycle
AU - Aktan, Hamit Doruk
AU - Bottasso, Carlo L.
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Individual pitch control (IPC) is used to mitigate loads on wind turbines, the most commonly applied method being based on a simple proportional integral (PI) formulation. Recently, a nonlinear PI (NPI) formulation has been proposed. Under simplified inflow conditions, NPI has been shown to provide load reductions that are similar to the standard PI formulation, but with a reduced pitch activity. This is interesting, because pitch activity can increase operation and maintenance costs, reduce component lifetime, in addition to implying an expenditure of energy to drive the actuators. This study focuses on the tuning and testing of NPI-IPC under more realistic inflow conditions.The analysis is conducted using two different wind turbines: the IEA Task 37 reference turbine, and the G2 scaled wind turbine for wind tunnel testing. Turbulent inflow conditions are generated based on standard turbulence models and with large eddy simulations (LES). The baseline PI and advanced NPI controllers are tuned by numerical optimizations driven by a fatigue-oriented cost function, based on aeroservoelastic simulations. Results confirm that, while the two controllers achieve a similar fatigue load mitigation, the NPI formulation is associated with a reduced actuator duty cycle.
AB - Individual pitch control (IPC) is used to mitigate loads on wind turbines, the most commonly applied method being based on a simple proportional integral (PI) formulation. Recently, a nonlinear PI (NPI) formulation has been proposed. Under simplified inflow conditions, NPI has been shown to provide load reductions that are similar to the standard PI formulation, but with a reduced pitch activity. This is interesting, because pitch activity can increase operation and maintenance costs, reduce component lifetime, in addition to implying an expenditure of energy to drive the actuators. This study focuses on the tuning and testing of NPI-IPC under more realistic inflow conditions.The analysis is conducted using two different wind turbines: the IEA Task 37 reference turbine, and the G2 scaled wind turbine for wind tunnel testing. Turbulent inflow conditions are generated based on standard turbulence models and with large eddy simulations (LES). The baseline PI and advanced NPI controllers are tuned by numerical optimizations driven by a fatigue-oriented cost function, based on aeroservoelastic simulations. Results confirm that, while the two controllers achieve a similar fatigue load mitigation, the NPI formulation is associated with a reduced actuator duty cycle.
UR - http://www.scopus.com/inward/record.url?scp=85173865306&partnerID=8YFLogxK
U2 - 10.1109/CCTA54093.2023.10252554
DO - 10.1109/CCTA54093.2023.10252554
M3 - Conference contribution
AN - SCOPUS:85173865306
T3 - 2023 IEEE Conference on Control Technology and Applications, CCTA 2023
SP - 581
EP - 586
BT - 2023 IEEE Conference on Control Technology and Applications, CCTA 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 IEEE Conference on Control Technology and Applications, CCTA 2023
Y2 - 16 August 2023 through 18 August 2023
ER -