Bayesian reinforcement learning with MCMC to maximize energy output of vertical axis wind turbine

Ağababaoğlu, Arda (2019) Bayesian reinforcement learning with MCMC to maximize energy output of vertical axis wind turbine. [Thesis]

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Optimization of energy output of small scale wind turbines requires a controller which keeps the wind speed to rotor tip speed ratio at the optimum value. An analytic solution can be obtained if the dynamic model of the complete system is known and wind speed can be anticipated. However, not only aging but also errors in modeling and wind speed prediction prevent a straightforward solution. This thesis proposes to apply a reinforcement learning approach designed to optimize dynamic systems with continuous state and action spaces, to the energy output optimization of Vertical Axis Wind Turbines (VAWT). The dynamic modeling and load control of the wind turbine are accomplished in the same process. The proposed algorithm is a model-free Bayesian Reinforcement Learning using Markov Chain Monte Carlo method (MCMC) to obtain the parameters of an optimal policy. The proposed method learns wind speed pro les and system model, therefore, can utilize all system states and observed wind speed pro les to calculate an optimal control signal by using a Radial Basis Function Neural Network (RBFNN). The proposed method is validated by performing simulation studies on a permanent magnet synchronous generator-based VAWT Simulink model to compare with the classical Maximum Power Point Tracking (MPPT). The results show signi cant improvement over the classical method, especially during the wind speed transients, promising a superior energy output in turbulent settings; which coincide with the expected application areas of VAWTs
Item Type: Thesis
Uncontrolled Keywords: Reinforcement learning. -- Markov chain Monte Carlo. -- Radial basis function neural network. -- Wind energy conversation systems. -- Vertical axis wind turbines. -- Pekiştirmeli öğrenme. -- Markov zincirli Monte Carlo. -- Dairesel tabanlı fonksiyon sinir ağı. -- Rüzgar enerjisi dönüştürme sistemleri. -- Dikey eksenli rüzgar türbini.
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ163.12 Mechatronics
Divisions: Faculty of Engineering and Natural Sciences > Academic programs > Mechatronics
Faculty of Engineering and Natural Sciences
Depositing User: IC-Cataloging
Date Deposited: 26 Aug 2019 14:32
Last Modified: 26 Apr 2022 10:30

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