叶片转动对风机引雷能力影响的模拟试验研究
发布时间：2018-11-07 17:45
【摘要】：风力发电机组与其它地面雷击目标物相比,最显著的特征是其叶片在遭受雷击时一般处于转动状态。为了研究叶片转动对风机引雷能力的影响机理,该文设计选取了适用于研究风机接闪试验的圆弧形高压电极,施加负极性250/2500μs标准操作波,对典型2MW风机的1:30微缩模型进行了叶片静止和旋转等不同状态下的接闪放电比对试验。采用升降法获取50%放电电压,并进行放电过程观测,结果表明:在1和1.3m间隙条件下,击穿电压随着叶片转速的提升而提升,先导连接位置随着转速的提升更加接近叶尖,叶片转动导致风机的引雷能力降低。分析认为叶片的旋转改变了叶尖区域的电荷分布,使叶尖上行先导发展不充分,从而影响了放电发展过程。所得结果可为风电机组的防雷保护提供参考借鉴。
[Abstract]:The most remarkable feature of wind turbine is that its blade is generally rotated when it is struck by lightning. In order to study the influence mechanism of blade rotation on the lightning induced ability of fan, a circular arc high pressure electrode suitable for the study of fan flashover test was designed and applied negative polarity 250 / 2500 渭 s standard operating wave. The 1:30 miniature model of typical 2MW fan was tested under different conditions such as blade static and rotating. The 50% discharge voltage was obtained by lifting method, and the discharge process was observed. The results show that the breakdown voltage increases with the increase of blade speed under the condition of 1 and 1.3 m gap. The leading connection position is closer to the tip of the blade with the increase of the speed, and the blade rotation results in the decrease of the lightning triggering capacity of the fan. It is considered that the rotation of the blade changes the charge distribution in the tip of the blade, which makes the upwardly leading development of the tip insufficient, thus affecting the development of the discharge process. The results can be used for reference for lightning protection of wind turbine.
【作者单位】： 武汉大学电气工程学院;
【分类号】：TM865
，
本文编号：2317100
[Abstract]:The most remarkable feature of wind turbine is that its blade is generally rotated when it is struck by lightning. In order to study the influence mechanism of blade rotation on the lightning induced ability of fan, a circular arc high pressure electrode suitable for the study of fan flashover test was designed and applied negative polarity 250 / 2500 渭 s standard operating wave. The 1:30 miniature model of typical 2MW fan was tested under different conditions such as blade static and rotating. The 50% discharge voltage was obtained by lifting method, and the discharge process was observed. The results show that the breakdown voltage increases with the increase of blade speed under the condition of 1 and 1.3 m gap. The leading connection position is closer to the tip of the blade with the increase of the speed, and the blade rotation results in the decrease of the lightning triggering capacity of the fan. It is considered that the rotation of the blade changes the charge distribution in the tip of the blade, which makes the upwardly leading development of the tip insufficient, thus affecting the development of the discharge process. The results can be used for reference for lightning protection of wind turbine.
【作者单位】： 武汉大学电气工程学院;
【分类号】：TM865
，
本文编号：2317100
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