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Protective Effect of Resveratrol-Containing Grape Peel Extract against UVB-induced Skin Damage
Jungeun Kim,Janice Nullan Averrila,Seungmin Park,Siyul Byeon,Chan Ho Jang,Nayoung Moon,Soojung Jeong,Yoonsu Kim,Yunju Woo,Ji Sun Lim,Sunghee Kim,Jisun Oh,Jong-Sang Kim 한국식품영양과학회 2018 한국식품영양과학회 학술대회발표집 Vol.2018 No.10
The Impact of Soybean-boiled Water on Gut Health in Mice
Soojung Jeong,Jungeun Kim,Seungmin Park,Siyul Byeon,Janice Nullan Averilla,Nayoung Moon,Yoonsu Kim,Yunju Woo,Ji Sun Lim,Sunghee Kim,Chan Ho Jang,Jisun Oh,Myeong Hui Choi,Jun Young Kim,Jong-Sang Kim 한국식품영양과학회 2018 한국식품영양과학회 학술대회발표집 Vol.2018 No.10
Feedforward Pitch Control Using Wind Speed Estimation
Yoonsu Nam,Jeonggi Kim,Insu Paek,Young-Hwan Moon,Seog-Joo Kim,Dong-Joon Kim 전력전자학회 2011 JOURNAL OF POWER ELECTRONICS Vol.11 No.2
The dynamic response of a multi-MW wind turbine to a sudden change in wind speed is usually slow, because of the slow pitch control system. This could cause a large excursion of the rotor speed and an output power over the rated. A feedforward pitch control can be applied to minimize the fluctuations of these parameters. This paper introduces the complete design steps for a feedforward pitch controller, which consist of three stages, i.e. the aerodynamic torque estimation, the 3-dimensional lookup table for the wind seed estimation, and the calculation of the feedforward pitch amount. The effectiveness of the feedforward control is verified through numerical simulations of a multi-MW wind turbine.