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| Structural Load Characteristics Analysis of Wind Turbines under Unsymmetrical Voltage Dips |
| Yan Zhuo1 , Song Zhanfeng2 , Zhang Chao3 , Li Yang4 |
| 1. Beijing Institute of Technology Beijing 100081 China; 2. Tianjin University Tianjin 300072 China; 3. Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China; 4. Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology Tianjin Polytechnic University Tianjin 300384 China |
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Abstract Growing wind power has impacts on the power systems into which wind turbines feed their power. New grid codes require wind turbines to ride through grid faults. The purpose of this research is to illustrate impacts of unsymmetrical voltage dips on the mechanical loads of a wind turbine. To study the structural loads of wind turbines under grid faults, this paper introduces the concept of co-simulation in the load characteristics analysis of wind turbines under voltage dips and a complete model including both mechanical and electrical parts is constructed. In order to confirms the correctness and reliability of this modeling scheme, a reference model based on the industry-accepted wind turbine analysis code is established. A side-by-side comparison of response predictions is further conducted, Based on this model,, a set of simulations reflecting dynamic response of blade tip, tower top, and shaft modes during unsymmetrical voltage dips are illustrated and analyzed. These results are expected to provide guidance for the design of wind turbines.
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Published: 05 November 2014
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2014, Vol. 29 
