【摘要】：風力發(fā)電機組與其它地面雷擊目標物相比,最顯著的特征是其葉片在遭受雷擊時一般處于轉動狀態(tài)。為了研究葉片轉動對風機引雷能力的影響機理,該文設計選取了適用于研究風機接閃試驗的圓弧形高壓電極,施加負極性250/2500μs標準操作波,對典型2MW風機的1:30微縮模型進行了葉片靜止和旋轉等不同狀態(tài)下的接閃放電比對試驗。采用升降法獲取50%放電電壓,并進行放電過程觀測,結果表明:在1和1.3m間隙條件下,擊穿電壓隨著葉片轉速的提升而提升,先導連接位置隨著轉速的提升更加接近葉尖,葉片轉動導致風機的引雷能力降低。分析認為葉片的旋轉改變了葉尖區(qū)域的電荷分布,使葉尖上行先導發(fā)展不充分,從而影響了放電發(fā)展過程。所得結果可為風電機組的防雷保護提供參考借鑒。
[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.
【作者單位】： 武漢大學電氣工程學院;
【分類號】：TM865
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本文編號：2317100