Rotational speed characteristics of load torque to extend the operable tip speed ratio range for fixed pitch wind turbines

This study explored the effective operational range of fixed pitch wind turbines by focusing on extending the lower end of tip speed ratios. We investigated how these kinds of wind turbines perform under higher-than-rated wind speeds by analysing the load torque characteristics of the generator usin...

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Main Authors: Hiroki Suzuki, Oluwasola Afolabi, Yutaka Hasegawa
Format: Default Conference proceeding
Published: 2024
Subjects:
Wind turbines
Online Access:https://hdl.handle.net/2134/27955068.v1
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author Hiroki Suzuki
Oluwasola Afolabi
Yutaka Hasegawa
author_facet Hiroki Suzuki
Oluwasola Afolabi
Yutaka Hasegawa
author_sort Hiroki Suzuki (3742837)
collection Figshare
description This study explored the effective operational range of fixed pitch wind turbines by focusing on extending the lower end of tip speed ratios. We investigated how these kinds of wind turbines perform under higher-than-rated wind speeds by analysing the load torque characteristics of the generator using numerical and mathematical methods. The core analysis involved non-dimensional governing equations, assessing the variation of the aerodynamictorque coefficient as a function of the tip speed ratio. Utilising data from two previous studies, the distribution of aerodynamic torque coefficients is detailed, and the fourth-order Runge-Kutta method is applied to numerically analyse the impact of load torque characteristics on turbine rotational behaviours. Further, the tip speed ratio changes from the optimal value under constant and linear load torque conditions were examined. Results indicate that under constant load, the tip speed ratio approaches zero below a critical ratio and stabilises above it. Under linear conditions, this critical ratio diminishes, broadening the operational range. The study proposes and validates novel equations for the critical tip speed ratio, highlighting the benefits of linear load torque adjustments that could enhance wind turbines’ performance and efficiency.
format Default
Conference proceeding
id rr-article-27955068
institution Loughborough University
publishDate 2024
record_format Figshare
spelling rr-article-279550682024-12-16T12:00:22Z Rotational speed characteristics of load torque to extend the operable tip speed ratio range for fixed pitch wind turbines Hiroki Suzuki (3742837) Oluwasola Afolabi (1259253) Yutaka Hasegawa (2728753) Wind turbines <p dir="ltr">This study explored the effective operational range of fixed pitch wind turbines by focusing on extending the lower end of tip speed ratios. We investigated how these kinds of wind turbines perform under higher-than-rated wind speeds by analysing the load torque characteristics of the generator using numerical and mathematical methods. The core analysis involved non-dimensional governing equations, assessing the variation of the aerodynamic<br>torque coefficient as a function of the tip speed ratio. Utilising data from two previous studies, the distribution of aerodynamic torque coefficients is detailed, and the fourth-order Runge-Kutta method is applied to numerically analyse the impact of load torque characteristics on turbine rotational behaviours. Further, the tip speed ratio changes from the optimal value under constant and linear load torque conditions were examined. Results indicate that under constant load, the tip speed ratio approaches zero below a critical ratio and stabilises above it. Under linear conditions, this critical ratio diminishes, broadening the operational range. The study proposes and validates novel equations for the critical tip speed ratio, highlighting the benefits of linear load torque adjustments that could enhance wind turbines’ performance and efficiency.<br></p> 2024-12-16T12:00:22Z Text Conference contribution 2134/27955068.v1 https://figshare.com/articles/conference_contribution/Rotational_speed_characteristics_of_load_torque_to_extend_the_operable_tip_speed_ratio_range_for_fixed_pitch_wind_turbines/27955068 CC BY 4.0
spellingShingle Wind turbines
Hiroki Suzuki
Oluwasola Afolabi
Yutaka Hasegawa
Rotational speed characteristics of load torque to extend the operable tip speed ratio range for fixed pitch wind turbines
title Rotational speed characteristics of load torque to extend the operable tip speed ratio range for fixed pitch wind turbines
title_full Rotational speed characteristics of load torque to extend the operable tip speed ratio range for fixed pitch wind turbines
title_fullStr Rotational speed characteristics of load torque to extend the operable tip speed ratio range for fixed pitch wind turbines
title_full_unstemmed Rotational speed characteristics of load torque to extend the operable tip speed ratio range for fixed pitch wind turbines
title_short Rotational speed characteristics of load torque to extend the operable tip speed ratio range for fixed pitch wind turbines
title_sort rotational speed characteristics of load torque to extend the operable tip speed ratio range for fixed pitch wind turbines
topic Wind turbines
url https://hdl.handle.net/2134/27955068.v1

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