Vibration Reduction of Wind Turbines Using Tuned Liquid Column Damper Using Stochastic Analysis

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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The Vibration Reduction in Multilevel Structure Model with the addition of Tuned Liquid Column Damper (TLCD):Study of the Influence of variations in TLCD’s mass ratio & orifice cross-sectional area

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/588/1/012029 ◽

2019 ◽

Vol 588 ◽

pp. 012029

Author(s):

H L Guntur ◽

A A A Daman ◽

W Hendrowati

Keyword(s):

Vibration Reduction ◽

Cross Sectional Area ◽

Liquid Column ◽

Structure Model ◽

Sectional Area ◽

Mass Ratio ◽

Cross Sectional ◽

Tuned Liquid Column Damper ◽

Multilevel Structure ◽

Liquid Column Damper

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Mitigating the structural vibrations of wind turbines using tuned liquid column damper considering soil-structure interaction

Renewable Energy ◽

10.1016/j.renene.2017.12.090 ◽

2018 ◽

Vol 120 ◽

pp. 322-341 ◽

Cited By ~ 21

Author(s):

Tadhg Buckley ◽

Phoebe Watson ◽

Paul Cahill ◽

Vesna Jaksic ◽

Vikram Pakrashi

Keyword(s):

Wind Turbines ◽

Soil Structure ◽

Liquid Column ◽

Soil Structure Interaction ◽

Structural Vibrations ◽

Structure Interaction ◽

Tuned Liquid Column Damper ◽

Liquid Column Damper

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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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