Performance Analysis of Ultra-Scale Downwind Wind Turbine Based on Rotor Cone Angle Control

Zhen Li, Bofeng Xu (), Xiang Shen, Hang Xiao, Zhiqiang Hu and Xin Cai
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Zhen Li: Research Center for Renewable Energy Generation Engineering of Ministry of Education, Hohai University, Nanjing 211100, China
Bofeng Xu: Research Center for Renewable Energy Generation Engineering of Ministry of Education, Hohai University, Nanjing 211100, China
Xiang Shen: Department of Mechanical and Construction Engineering, Northumbria University, Newcastle upon Tyne NE1 8ST, UK
Hang Xiao: China State Shipbuilding Corporation Haizhuang Windpower Co., Ltd., Chongqing 401123, China
Zhiqiang Hu: School of Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
Xin Cai: Structural Engineering Research Center of Jiangsu Province Wind Turbine, Hohai University, Nanjing 211100, China

Energies, 2022, vol. 15, issue 18, 1-11

Abstract: The theoretical feasibility of the power output strategy based on rotor cone angle control for ultra-scale downwind wind turbines is studied in this paper via the Open FAST simulation platform. The performance of five cases, namely UW, DW, DWC, DW6, and DW6IC, which have different rotor parameters or control strategies compared with the reference DTU 10 MW wind turbine, are calculated and analyzed. It is found that the downwind rotors have significant advantages in reducing the blade root load. The DW case reduces the peak load at the blade root by 22.54% at the cost of 1.57% annual energy production loss. By extending the length and redesigning the stiffness of the blade, the DW6 case achieves 14.82% reduction in the peak load at the blade root and 1.67% increase in the annual energy production under the same blade weight as that of the UW. The DWC case with rotor cone angle control has the same aerodynamic performance as the DW case with the same blade parameters. However, when the wind speed achieves or exceeds the rated speed, the blade root load decreases at a greater rate with the increasing wind speeds, and achieves minimum load with a wind speed of 16 m/s. Compared with the UW case, the DW6IC case with the improved rotor cone angle control reduces the peak load of the blade root by 22.54%, leading to an increase in annual energy production by 1.12% accordingly.

Keywords: wind turbine; downwind rotor; rotor cone angle control; performance analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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