Study on Support Structure Behaviors under Different Wind Turbine Control Systems

  • 陳 政誼

Student thesis: Doctoral Thesis

Abstract

In recent years due to the threat of global warming and the reduction in energy supply the development of renewable energy is crucial Among them wind energy is one of the most commonly used renewable energy sources but there are limited places suitable for installing wind turbines It is also an important development direction to take into account areas that are often faced with typhoons and earthquakes or to improve the efficiency of using wind energy in existing wind farms In the revision of IEC61400 in 2019 it was proposed to include earthquakes and tropical cyclones into the design load cases The design loads used in this study refer to the new version of the standard Reference the 5MW reference wind turbine published by the National Renewable Energy Laboratory (NREL) in 2009 and the 10MW reference wind turbine published by the Technical University of Denmark (DTU) in 2013 to compare the operation of the control system Both are solved by a PID controller The NREL controller uses the PID controller when calculating the blade rotation angle; the DTU controller uses two sets of PID controllers for the blade rotation angle and calculating the generating torque Since the main design loads that control the steel consumption of the supporting structure of the wind turbine all occur when the control system fails or shuts down different control systems have limited influence on the steel consumption In order to confirm the recommended values for earthquakes and typhoons in the new version of the IEC code the changes in the amount of steel used for the towers columns braces and piles of the main supporting structures are considered in different load combinations
Date of Award2020
Original languageEnglish
SupervisorShen-Haw Ju (Supervisor)

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