Active tip deflection control for wind turbines

Jaime Liew, Wai Hou Lio, Albert Meseguer Urbán, Jessica Holierhoek, Taeseong Kim*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

This paper studies the use of blade tip sensors for load reductions and blade-tower clearance control. Typically, modern blade tip sensors measure flapwise tip deflection distances at a high sampling rate, and such measurements can be utilised as feedback signals for control operations. Thus, this paper proposes a novel blade pitch control design based on the tip deflection measurements and individual pitch control (IPC). Firstly, an IPC system design is presented, using the tip deflection measurements to alleviate turbine fatigue loads caused by differential loads such as wind shear, yaw misalignment and turbulence. Secondly, a novel implementation of IPC with tip trajectory tracking feature is proposed where the blade tips are guided along a fixed trajectory to maximise blade-tower clearance. The motivation of this implementation is to reduce the chance of blade-tower interactions for large and flexible rotors. The presented controller is implemented in HAWC2, and high fidelity load measurements are produced using the DTU10MW reference wind turbine. The simulation results showed that the fatigue damage reduction on key turbine components and the improved blade-tower clearance can be achieved simultaneously. Lifetime equivalent load reductions were seen in both rotating and fixed frame components under the normal operating conditions.
Original languageEnglish
JournalRenewable Energy
Volume149
Pages (from-to)445-454
Number of pages10
ISSN0960-1481
DOIs
Publication statusPublished - 2020

Keywords

  • Wind energy
  • Tip deflection sensors
  • Individual pitch control
  • Tower clearance
  • Fatigue load reduction

Cite this

@article{1269db3a423f4c778681e216c7c2e872,
title = "Active tip deflection control for wind turbines",
abstract = "This paper studies the use of blade tip sensors for load reductions and blade-tower clearance control. Typically, modern blade tip sensors measure flapwise tip deflection distances at a high sampling rate, and such measurements can be utilised as feedback signals for control operations. Thus, this paper proposes a novel blade pitch control design based on the tip deflection measurements and individual pitch control (IPC). Firstly, an IPC system design is presented, using the tip deflection measurements to alleviate turbine fatigue loads caused by differential loads such as wind shear, yaw misalignment and turbulence. Secondly, a novel implementation of IPC with tip trajectory tracking feature is proposed where the blade tips are guided along a fixed trajectory to maximise blade-tower clearance. The motivation of this implementation is to reduce the chance of blade-tower interactions for large and flexible rotors. The presented controller is implemented in HAWC2, and high fidelity load measurements are produced using the DTU10MW reference wind turbine. The simulation results showed that the fatigue damage reduction on key turbine components and the improved blade-tower clearance can be achieved simultaneously. Lifetime equivalent load reductions were seen in both rotating and fixed frame components under the normal operating conditions.",
keywords = "Wind energy, Tip deflection sensors, Individual pitch control, Tower clearance, Fatigue load reduction",
author = "Jaime Liew and Lio, {Wai Hou} and {Meseguer Urb{\'a}n}, Albert and Jessica Holierhoek and Taeseong Kim",
year = "2020",
doi = "10.1016/j.renene.2019.12.036",
language = "English",
volume = "149",
pages = "445--454",
journal = "Renewable Energy",
issn = "0960-1481",
publisher = "Pergamon Press",

}

Active tip deflection control for wind turbines. / Liew, Jaime; Lio, Wai Hou; Meseguer Urbán, Albert; Holierhoek, Jessica; Kim, Taeseong.

In: Renewable Energy, Vol. 149, 2020, p. 445-454.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Active tip deflection control for wind turbines

AU - Liew, Jaime

AU - Lio, Wai Hou

AU - Meseguer Urbán, Albert

AU - Holierhoek, Jessica

AU - Kim, Taeseong

PY - 2020

Y1 - 2020

N2 - This paper studies the use of blade tip sensors for load reductions and blade-tower clearance control. Typically, modern blade tip sensors measure flapwise tip deflection distances at a high sampling rate, and such measurements can be utilised as feedback signals for control operations. Thus, this paper proposes a novel blade pitch control design based on the tip deflection measurements and individual pitch control (IPC). Firstly, an IPC system design is presented, using the tip deflection measurements to alleviate turbine fatigue loads caused by differential loads such as wind shear, yaw misalignment and turbulence. Secondly, a novel implementation of IPC with tip trajectory tracking feature is proposed where the blade tips are guided along a fixed trajectory to maximise blade-tower clearance. The motivation of this implementation is to reduce the chance of blade-tower interactions for large and flexible rotors. The presented controller is implemented in HAWC2, and high fidelity load measurements are produced using the DTU10MW reference wind turbine. The simulation results showed that the fatigue damage reduction on key turbine components and the improved blade-tower clearance can be achieved simultaneously. Lifetime equivalent load reductions were seen in both rotating and fixed frame components under the normal operating conditions.

AB - This paper studies the use of blade tip sensors for load reductions and blade-tower clearance control. Typically, modern blade tip sensors measure flapwise tip deflection distances at a high sampling rate, and such measurements can be utilised as feedback signals for control operations. Thus, this paper proposes a novel blade pitch control design based on the tip deflection measurements and individual pitch control (IPC). Firstly, an IPC system design is presented, using the tip deflection measurements to alleviate turbine fatigue loads caused by differential loads such as wind shear, yaw misalignment and turbulence. Secondly, a novel implementation of IPC with tip trajectory tracking feature is proposed where the blade tips are guided along a fixed trajectory to maximise blade-tower clearance. The motivation of this implementation is to reduce the chance of blade-tower interactions for large and flexible rotors. The presented controller is implemented in HAWC2, and high fidelity load measurements are produced using the DTU10MW reference wind turbine. The simulation results showed that the fatigue damage reduction on key turbine components and the improved blade-tower clearance can be achieved simultaneously. Lifetime equivalent load reductions were seen in both rotating and fixed frame components under the normal operating conditions.

KW - Wind energy

KW - Tip deflection sensors

KW - Individual pitch control

KW - Tower clearance

KW - Fatigue load reduction

U2 - 10.1016/j.renene.2019.12.036

DO - 10.1016/j.renene.2019.12.036

M3 - Journal article

VL - 149

SP - 445

EP - 454

JO - Renewable Energy

JF - Renewable Energy

SN - 0960-1481

ER -