풍력에너지 저널 (Journal of Wind Energy)

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Info. Vol.12 - No.1 (2021.03.31)
DOI kwea.2021.12.1.001
Title MW급 풍력터빈의 피치 구동기의 시간지연과 출력응답에 관한 연구 (A Study on the Time Delay of Pitch Actuator and Output Power Response for MW Wind Turbines)
Authors 임채욱*
Institutions * 한밭대학교, 기계공학과 교수 (교신저자)
Abstract The control method of variable speed and pitch has been adopted for most recent MW wind turbines. In the variable pitch system, the pitch angle is adjusted to maintain the rated power when the wind speed is higher than rated. The pitch system consists of a pitch controller and pitch actuator. When the pitch angle operates in the pitch actuator, a time delay typically occurs because of the existence of Coulomb friction. In previous research, it was recommended to set about 15 rad/s for the bandwidth of the pitch actuator in terms of output power response when the time delay is not considered. In this paper, we carried out numerical simulations with a turbulence wind speed for a 2 MW wind turbine considering the time delay of the pitch actuator. It is recommended to set about 60 rad/s for the bandwidth of the pitch controller, as this is appropriate when all things such as mean output power, standard deviation of output power, mean rotor speed, standard deviation of rotor speed, and rotor overspeed are considered.
Keyword Bandwidth (대역폭), Output power (출력), Pitch actuator (피치 구동기), Rotor speed (로터 속도), Time delay (시간지연), Wind turbine (풍력터빈)
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