雷电下转动风机叶片接闪特性模拟试验研究Experimental Study on Lightning Discharge Characteristic of Wind Turbine's Rotating Blades
蓝磊;姒天军;王羽;屈路;徐剑伟;文习山;
摘要(Abstract):
风力发电机在遭受雷击时叶片一般处于转动状态,而叶片转动对其雷击接闪特性的影响尚不明确。为探究转动风机的叶片雷击接闪特性,设计了可控转速的1:30缩比2 MW风机模型与适合试验的弧面电极,采用标准负极性操作波,制作了2种类型的叶尖接闪器,开展了1 m间隙时不同转速下的大量接闪试验。试验结果表明,在1 m间隙下,无论叶尖是接闪帽还是接闪盘配置,间隙击穿电压均随着转速的提升而升高,而风机静止时击穿电压会随接闪叶片角度增大而升高。分析认为,叶片旋转会导致叶尖区域积聚的正离子浓度降低,抑制了上行先导的发展,从而提升了击穿电压。根据试验结果推断,在此工况下风机旋转会降低其引雷能力。试验结果对风机的防雷设计具有参考意义。
关键词(KeyWords): 转动风机;接闪器;缩比试验;接闪特性;间隙放电
基金项目(Foundation): 国家电网公司2015年总部科技项目(SGTYHT/14-JS-188)~~
作者(Author): 蓝磊;姒天军;王羽;屈路;徐剑伟;文习山;
Email:
DOI: 10.13335/j.1000-3673.pst.2017.1654
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