Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
On the application of adptive controllers to a 25 MW floating wind turbine
Submission Author:
Carlos Renan dos Santos , Noruega , Brazil
Co-Authors:
Carlos Renan dos Santos
Presenter: Carlos Renan dos Santos
doi://10.26678/ABCM.COBEM2023.COB2023-0269
Abstract
Floating wind turbines are a promising technology for harnessing wind energy in deep waters, but they face challenges related to control and stability. One of these challenges is the so-called negative damping effect, which may occur beyond the rated wind speed. Classical proportional-integral controllers can mitigate negative damping effects by detuning the controller's frequency below the natural pitch frequency of the platform. However, when applied to very large floating wind turbines, this technique can result in slow controllers due to the small natural pitch frequency of the system. To address this issue, the present study proposes using adaptive super-twisting sliding mode controllers to track the rotational speed of the rotor instead of the classical proportional-integral approach. The study compares the performance of both control strategies in a 25 MW floating wind turbine designed by upscaling the IEA 15 MW. The analyses focus on the rotor speed, power production, and platform behavior subject to uniform and turbulent wind. The results suggest that adaptive controllers can stabilize the platform while maintaining good track of the rated rotational speed and power output of the wind turbine. By avoiding the need for detuning, adaptive controllers can provide faster and more accurate control of the rotational speed, thereby improving the stability and efficiency of floating wind turbines.
Keywords
sliding controllers, floating wind turbine, negative feedback, adaptive control
