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首页> 外文期刊>Wind Energy >Estimation of the electric fields and dielectric breakdown in non-conductive wind turbine blades subjected to a lightning stepped leader
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Estimation of the electric fields and dielectric breakdown in non-conductive wind turbine blades subjected to a lightning stepped leader

机译：受到雷电阶梯引导的​​非导电风力涡轮机叶片中电场和介电击穿的估计

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In this paper, the electric fields in the wind turbine blades due to the lightning stepped leader are studied, and the dielectric breakdown is assessed. The developed finite element analysis (FEA) includes the full length of the leader and enables one to incorporate various uniform and non-uniform charge density models. The lightning striking distance is calculated using the rolling sphere method. The electric field in a horizontal axis wind turbine with three blades representing Sandia 100m All-glass Baseline Wind Turbine Blades (SNL 100-00) at three different lightning protection levels (LPL) is computed and compared to the dielectric breakdown strength of the blades. The dielectric breakdown strength of the blades is evaluated based on the experimental data. The results show that the tip region of the blade is the most vulnerable to the dielectric breakdown with the safety factor as low as 1.32 at LPL I. Copyright (c) 2016 John Wiley & Sons, Ltd.
机译：本文研究了雷电阶梯状引力引起的风力涡轮机叶片中的电场，并评估了介电击穿。发达的有限元分析（FEA）包括引线的全长，使人们能够合并各种均匀和不均匀的电荷密度模型。雷击距离是使用滚球法计算的。计算了具有三个代表桑迪亚100m全玻璃基线风力涡轮机叶片（SNL 100-00）的三个叶片的水平轴风力涡轮机中的电场，该叶片具有三种不同的雷电防护等级（LPL），并与叶片的介电击穿强度进行了比较。根据实验数据评估叶片的介电击穿强度。结果表明，叶片的尖端区域最容易受到电介质击穿的损坏，在LPL I处的安全系数低至1.32。版权所有（c）2016 John Wiley＆Sons，Ltd.

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