Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6680158 | Applied Energy | 2018 | 14 Pages |
Abstract
The variable-speed wind turbine (VSWT) is a dominant type of wind power generator. In order to improve wind energy production, its off-design performance has been considered for aerodynamic optimization, since it frequently operates at non-optimal tip speed ratio (TSR) in the maximum power point tracking (MPPT) mode. In this paper, the objective function for multi-point aerodynamic optimization is firstly derived as wind energy capture efficiency. Then, a new multi-point aerodynamic design method whose objective function can approximate wind energy capture efficiency is proposed. Since the proposed optimization aims to increase the closed-loop efficiency with a clear physical meaning, static aerodynamic performance and MPPT dynamics can be better coordinated and correspondingly higher wind energy production of VSWTs can be achieved. Finally, using the 1.5â¯MW and 5.0â¯MW VSWTs developed by National Renewable Energy Laboratory (NREL) as the baseline, the proposed method is verified by simulations with commercial software Bladed and experiment test on a wind turbine testbed.
Related Topics
Physical Sciences and Engineering
Energy
Energy Engineering and Power Technology
Authors
Minghui Yin, Zhiqiang Yang, Yan Xu, Jiankun Liu, Lianjun Zhou, Yun Zou,