MW급 풍력터빈의 피치 구동기의 대역폭에 관한 연구
A Study on the Bandwidth of a Pitch Actuator for a MW Wind Tu
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초록
Power production is one of the main objectives of wind turbines. Pitch control is utilized to adjust the power produced tothe rated value when the wind speed is over the rated value. In real wind turbines, pitch actuators, such as an electric motor orhydraulic actuator, are used to control the pitch angle of the blades. As the length of the blades in the MW wind turbines becomeslonger, the mass moment of inertia of the blade increases. This means that there is a limitation to the bandwidth of the pitch actuator. In this study, we investigated the reduction of the mean power, power dip, standard deviation of the power, standard deviation of therotor speed, and rotor overspeed quantitatively according to the bandwidth of the pitch actuator for a 2 MW wind turbine. Thesimulation results showed that a bandwidth of more than 15 rad/s is appropriate.
Abstract
Power production is one of the main objectives of wind turbines. Pitch control is utilized to adjust the power produced tothe rated value when the wind speed is over the rated value. In real wind turbines, pitch actuators, such as an electric motor orhydraulic actuator, are used to control the pitch angle of the blades. As the length of the blades in the MW wind turbines becomeslonger, the mass moment of inertia of the blade increases. This means that there is a limitation to the bandwidth of the pitch actuator. In this study, we investigated the reduction of the mean power, power dip, standard deviation of the power, standard deviation of therotor speed, and rotor overspeed quantitatively according to the bandwidth of the pitch actuator for a 2 MW wind turbine. Thesimulation results showed that a bandwidth of more than 15 rad/s is appropriate.
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