【摘要】：為研究接閃器對(duì)旋轉(zhuǎn)風(fēng)機(jī)引雷能力的影響機(jī)理,設(shè)計(jì)了典型2 MW容量風(fēng)機(jī)的1:30微縮模型,考慮了葉尖部分2種典型接閃器類型,利用波形參數(shù)為-250/2 500μs的負(fù)極性操作沖擊波開展了旋轉(zhuǎn)風(fēng)機(jī)模型的接閃放電試驗(yàn)。試驗(yàn)采用升降法獲取了各工況條件下的50%放電電壓,并進(jìn)行了放電過程觀測(cè)。試驗(yàn)結(jié)果表明:在長(zhǎng)度為1 m的間隙條件下,間隙的擊穿電壓隨著葉片轉(zhuǎn)速的升高而提升,最多提升4.07%;同時(shí),隨著接閃器曲率半徑的增大,間隙擊穿電壓降低,迎面流注的連接位置更加接近高壓電極,風(fēng)機(jī)的引雷能力也增強(qiáng),葉片轉(zhuǎn)動(dòng)對(duì)風(fēng)機(jī)引雷能力的影響程度減小。分析認(rèn)為,接閃器的曲率半徑和葉片的轉(zhuǎn)動(dòng)改變了葉尖區(qū)域的電荷分布,對(duì)葉尖接閃器流注的產(chǎn)生和發(fā)展產(chǎn)生影響,從而改變了風(fēng)機(jī)的引雷能力。試驗(yàn)結(jié)果為風(fēng)電機(jī)組的接閃器設(shè)計(jì)提供了參考借鑒。
[Abstract]:In order to study the influence mechanism of the flasher on the lightning inducing capacity of the rotating fan, a 1:30 miniature model of the typical 2 MW capacity fan was designed, and two typical types of the flasher in the tip of the blade were considered. Using the negative operating shock wave with a waveform parameter of -250 / 2 500 渭 s, the flashover discharge test of the rotating fan model was carried out. The 50% discharge voltage under different working conditions was obtained by the method of lifting and lifting, and the discharge process was observed. The experimental results show that the breakdown voltage of the gap increases with the increase of blade speed, and the maximum increase is 4.07 when the length of the gap is 1 m. At the same time, with the increase of the radius of curvature of the flasher, the gap breakdown voltage decreases, the connection position of the direct flow is closer to the high pressure electrode, the lightning inducing capacity of the fan is enhanced, and the influence of blade rotation on the lightning induced ability of the fan is reduced. It is concluded that the radius of curvature and the rotation of the blade change the charge distribution in the tip of the blade and affect the generation and development of the flow in the tip of the flicker, thus changing the lightning triggering capacity of the fan. The test results provide a reference for the design of wind turbine flasher.
【作者單位】： 武漢大學(xué)電氣工程學(xué)院;
【基金】：國家電網(wǎng)公司科技項(xiàng)目(SGTYHT/14-JS-188)~~
【分類號(hào)】：TM614;TM862

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本文編號(hào)：2323342