Abstract
The generator torque control loop of a multi-MW wind turbine consists of three operational regions, i.e. a max Cp region, a transient region around the rated rotor speed, and a power regulation region. The performance and mechanical stress on the wind turbine structure are closely related with how the torque schedule is mechanized in the transient and above-rated regions. Using a drive train model, the closed loop dynamic characteristics for different torque schedules were analyzed. It is found that the slope of the torque for the rotor speed in the transient region is the major factor which determines the performance and mechanical loading of the wind turbine. The effect of using a variable torque instead of the fixed rated torque in the above-rated region is also analyzed.
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Recommended by Associate Editor Cheolung Cheong
Yoonsu Nam was born in Suwon, Korea, in 1958. He receives his B.S. in Nuclear Engineering form Seoul National University, Seoul, Korea, in 1981. He received his M.S. from the Department of Machine Design, Seoul National University, in 1983. He received his Ph.D. in Mechanical GA, USA, in 1991. From 1983 to 1986, he was with the Central Research Institute of GoldStar (LG Electrinics) Inc., Korea. From 1992 to 1997, he was with the Flight Dynamics and Control Laboratory of the Agency for Defense Development, Daejeon, Korea. From 1997 to 2013, he was with the School of Mechanical and Mechatronics Engineering, Kangwon National University, Chuncheon, Korea. His research interests include mechanical load reduction control of MW class wind turbines.
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Nam, Y., La, Y., Son, J. et al. The effect of torque scheduling on the performance and mechanical loads of a wind turbine. J Mech Sci Technol 28, 1599–1608 (2014). https://doi.org/10.1007/s12206-014-0306-0
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DOI: https://doi.org/10.1007/s12206-014-0306-0