Optimal calibration of a tuned liquid column damper (TLCD) for rotating wind turbine blades

Among the floating wind turbine support concepts for carrying large-scale wind turbines, the barge type is more simple and inexpensive to install. The ability to install barge type platforms over a broad range of sea depths increases the number of site options suitable for its installation. Although there are several advantages related to barge type platforms, its significant angular motions which induce dynamic loads in the rotor, tower and drivetrain, hinder its commercial development. In this study, a single degree-of-freedom TLCD (Tuned Liquid Column Damper), which is placed on the turbine’s tower, is incorporated into a modified version of the aero-elastic code FAST. The response of a floating wind turbine with a barge type support controlled by a TLCD subjected to couple hydrodynamic and aerodynamic loads is investigated. The solution of multi degree-of-freedom floating wind turbine coupled with a TLCD dynamic system is done by a sequential method. In this method, two coupled systems of nonlinear differential equations are solved separately by a modified version of FAST in which an added module solves the nonlinear differential equation of motion of the TLCD. The results are compared to the baseline system. The results indicate that this passive type control approach can be used to improve the structural response of floating wind turbines.

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Optimal calibration of the rotational inertia double tuned mass damper (RIDTMD) for rotating wind turbine blades

Journal of Sound and Vibration ◽

10.1016/j.jsv.2020.115827 ◽

2021 ◽

Vol 493 ◽

pp. 115827

Author(s):

Zili Zhang ◽

Tobias Greve Larsen

Keyword(s):

Wind Turbine ◽

Turbine Blades ◽

Tuned Mass Damper ◽

Rotational Inertia ◽

Wind Turbine Blades ◽

Mass Damper ◽

Optimal Calibration

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Tuned liquid column dampers for mitigation of edgewise vibrations in rotating wind turbine blades

Structural Control and Health Monitoring ◽

10.1002/stc.1689 ◽

2014 ◽

Vol 22 (3) ◽

pp. 500-517 ◽

Cited By ~ 27

Author(s):

Zili Zhang ◽

Biswajit Basu ◽

Søren R. K. Nielsen

Keyword(s):

Wind Turbine ◽

Turbine Blades ◽

Liquid Column ◽

Wind Turbine Blades ◽

Liquid Column Dampers

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Comparative Study of Utilizing a New Type V-Shaped Tuned Liquid Column Damper and U-Shaped Tuned Liquid Column Damper in Floating Wind Turbines

Volume 7: Ocean Space Utilization; Ocean Renewable Energy ◽

10.1115/omae2012-83346 ◽

2012 ◽

Cited By ~ 3

Author(s):

Milad Shadman ◽

Abbas Akbarpour

Keyword(s):

Wind Turbine ◽

Mathematical Formulation ◽

Liquid Column ◽

Degree Of Freedom ◽

Time Step ◽

Tuned Liquid Column Damper ◽

Floating Wind Turbine ◽

New Type ◽

Type V ◽

Liquid Column Damper

While utilizing TLCD (Tuned Liquid Column Damper), severe excitation circumstances may lead to empty one of the vertical sections and make the liquid column to lose its U-Shape which results in dramatic changes in mathematical formulation and physical behavior of the liquid column. In this work, the response of a floating wind turbine with a barge type support controlled by a new type V-Shaped Tuned Liquid Column Damper subjected to couple hydrodynamic and aerodynamic loads is investigated through using a modified version of the aero-elastic code FAST (Fatigue, Aerodynamics, Structures and Turbulence). A sequential method is applied to solve the multi degree of freedom floating wind turbine couple with a single degree of freedom V-Shaped Tuned Liquid Column Damper. Through this method, the nonlinear equation of motion of the damper is incorporated in a modified version of FAST while V-Shaped Tuned Liquid Column Damper damping force due to the fore-aft tower top acceleration on turbine’s tower is calculated in each time step. The results are compared to the floating wind turbine system with TLCD (Tuned Liquid Column Damper) as well as the baseline system. It is shown that utilizing V-Shaped Tuned Liquid Column Damper in comparison to U-Shaped one result in more reliable structural response specifically under severe wind conditions in floating wind turbine systems.

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Performance of a Passive Tuned Liquid Column Damper for Floating Wind Turbines

Volume 10: Ocean Renewable Energy ◽

10.1115/omae2019-96360 ◽

2019 ◽

Author(s):

Wei Yu ◽

Frank Lemmer ◽

Po Wen Cheng

Keyword(s):

Wind Turbine ◽

Wind Turbines ◽

Structural Model ◽

Power Production ◽

Liquid Column ◽

Order System ◽

Elastic Model ◽

Tuned Liquid Column Damper ◽

Floating Wind Turbine ◽

Liquid Column Damper

Abstract The motivation of the present paper is to show the proof-of-concept of a passive Tuned Liquid Column Damper (TLCD) for floating wind turbines, which increases the platform pitch damping and power production under wind and wave excitations. As the first step, a reliable TLCD model is implemented and coupled with a reduced order floating wind turbine model. Here, the TLCD is modelled as a second order system which is known for ships, whereas the structural model is a coupled aero-hydro-servo-elastic model with five degrees of freedom. The results show that the TLCD is able to damp the platform resonances but to a limited extent, which is inline the findings of previous research. However, the improved platform pitch stability allows a larger blade pitch control bandwidth, which is normally limited by the underdamped soft support platform. Therefore, by introducing the passive TLCD into the floating wind turbine system, a better power production is achieved.

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