(6) The typhoon effect on the aerodynamic performance of a floating offshore wind turbine
Zhe Ma a , b , Wei Li c , Nianxin Ren a , b , d , ∗, Jinping Ou a , b
a Deepwater Engineering Research Center, Dalian University of Technology, Dalian 116024, China
b State Key Laboratory of Coast and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
c Offshore Wind Power R&D Center, Hydrochina Huadong Engineering Corporation, Hangzhou 310014, China
d Beijing’s Key Laboratory of Structural Wind Engineering and Urban Wind Environment, Beijing Jiaotong University, Beijing, 100044, China
Received 2 May 2017; received in revised form 24 August 2017; accepted 1 September 2017
Available online 15 September 2017
Abstract
The wind energy resource is considerably rich in the deep water of China South Sea, where wind farms have to face the challenge of extreme typhoon events. In this work, the typhoon effect on the aerodynamic performance of the 5MW OC3-Hywind floating offshore wind turbine (FOWT) system has been investigated, based on the Aero-Hydro-Servo-Elastic FAST code. First, considering the full field observation data of typhoon “Damrey”is a long duration process with significant turbulence and high wind speed, so one 3-h representative truncated typhoon wind speed time history has been selected. Second, the effects of both the (variable-speed and collective-pitch) control system of NREL 5 MW wind turbine and the motion of the floating platform on the blade aerodynamic performance of the FOWT system during the representative typhoon time history has been investigated, based on blade element momentum (BEM) theory (coupled with potential theory for the calculation of the hydrodynamic loads of the Spar platform). Finally, the effects of different wind turbine control strategies, control parameter (KP–KI) combinations, wave heights and parked modes on the rotor aerodynamic responses of the FOWT system have been clarified. The extreme typhoon event can result in considerably large extreme responses of the rotor thrust and the generated power due to the possible blade pitch angle error phenomenon. One active-parked strategy has been proposed for reducing the maximum aerodynamic responses of the FOWT system during extreme typhoon events.
© 2017 Shanghai Jiaotong University. Published by Elsevier B.V.
This is an open access article under the CC BY-NC-ND license. ( http://creativecommons.org/licenses/by-nc-nd/4.0/ )
Keywords: Typhoon; Floating offshore wind turbine; Aerodynamic performance; Control system; FAST.