Study of Tower Clearance Safety Protection during Extreme Gust Based on Wind Turbine Monitoring Data

Yazhou Wang, Xin Cai, Shifa Lin, Bofeng Xu, Yuan Zhang and Saixian Bian
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Yazhou Wang: College of Mechanics and Materials, Hohai University, Nanjing 211100, China
Xin Cai: College of Mechanics and Materials, Hohai University, Nanjing 211100, China
Shifa Lin: College of Mechanics and Materials, Hohai University, Nanjing 211100, China
Bofeng Xu: Wind Turbine Structural Engineering Research Center of Jiangsu Province, Nanjing 211100, China
Yuan Zhang: College of Mechanics and Materials, Hohai University, Nanjing 211100, China
Saixian Bian: College of Mechanics and Materials, Hohai University, Nanjing 211100, China

Energies, 2022, vol. 15, issue 12, 1-11

Abstract: Large-scale wind turbines often face the problem of tower clearance safety under extreme gust conditions. Since gust intensity is positively correlated with the change rate of the generator’s speed, a gust identification method is proposed based on wind turbine monitoring data. Furthermore, a novel tower clearance safety protection strategy is proposed, which superimposes some additional speed requirements on the basis of normal pitch rate when identifying extreme gust so as to alleviate the dynamic response of the wind turbine. Simulations and comparison of a 5 MW wind turbine, before and after applying the new strategy, showed that the new strategy can induce an increase in pitch angle for the wind turbine and, simultaneously, avoids the emergency stop caused by the generator’s overspeed. Meanwhile, when the new strategy is adopted, the blade tip’s deformation and the load on the top of the tower are reduced by 19.9% and 52.2%, respectively. Therefore, the proposed strategy can not only protect the safety of the wind turbine but it also reduces costs.

Keywords: wind turbine; wind energy; tower clearance; gust; monitoring data (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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