Optimal nonlinear controller design in Bladeless Wind Turbine

نوع: Type: thesis

مقطع: Segment: masters

عنوان: Title: Optimal nonlinear controller design in Bladeless Wind Turbine

ارائه دهنده: Provider: Zahra Zamanian

اساتید راهنما: Supervisors: Soheil Ganjehfar (Ph. D) Mohammad Amin Ghassemi (Ph. D)

اساتید مشاور: Advisory Professors:

اساتید ممتحن یا داور: Examining professors or referees: دکتر عباس رمضانی - دکتر غنیئی

زمان و تاریخ ارائه: Time and date of presentation: December, 24, 2020

مکان ارائه: Place of presentation: Adobe connect (Online)

چکیده: Abstract: In recent years, the use of new technologies to build wind turbines so that they can be economical, while reducing the visual negative effects of conventional turbines has received much attention. To this end, a Spanish company called Vortex has designed a new turbine. The main materials used for manufacturing Vortex turbines are carbon fibr polymers, plastics, steel and copper. This wind turbine consist of a relatively long cylinder mounted on a flexible structure in the flow field. There are many challenges to structure and using this bladeless wind turbine, the most important of this challenges are controlling the bladeless wind turbine and achieving to maximum mechanical power. In this paper, optimal controller is provided to achieve maximum mechanical power. Due to the nonlinear dynamics of the wind turbine, optimizing the control performance with a nonlinear controller is essential. Therefore, a nonlinear optimal control rule is used. In this paper, using this method the state-dependent riccati equation, an optimal nonlinear controller is designed to track vibrations as desired signal. At speed 1.4 m/s at frequency of Ω = 1.3, the maximum efficiency is 36 %. At higher wind speeds a secondary gain-scheduling (GS) controller with nonlinear optimal controller is assembled. It has reached 19 kw of mechanical power at wind speed 24 m/s and at frequency of Ω = 15. Finally, variable speed wind is applied to the system so that the controller is able to keep the wind turbine vibrations constant in limited range. The simulation of bladeless wind turbine and the controller section are simulated using MATLAB/Simulink. Finally, the simulation results show the performance of the control method used. Key Words: Maximum power extraction, Bladeless Wind Turbine(BWT),Vortex-Induced Vibration(VIV),Optimal control,SDRE,Vortex

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