發(fā)布時間：2018-06-30 20:38

  本文選題：雷電放電試驗 + 避雷索　； 參考：《合肥工業(yè)大學》2016年碩士論文

【摘要】：本文介紹的自主研發(fā)的新型輕質等離子體傳導式避雷索作為浮空器上新型的雷電防護裝置,目前缺少對其雷電防護特性的試驗研究。本論文的目的是通過對避雷索的雷電防護特性進行試驗研究,評估其雷電擊距和保護范圍,并與傳統(tǒng)避雷線的雷電防護性能進行對比。試驗時將避雷索放置在棒—板放電結構中,用棒電極模擬自然雷電下行先導,置于避雷索旁的棒形導體模擬被保護物�；谏鲜鲈囼灧椒�,應用滾球法對其雷電保護范圍進行評估,以雷電防護概率大于90%為限值,對高1.2m,紐扣間隙0.5mm、1mm避雷索的雷電防護特性進行了模擬雷擊試驗,統(tǒng)計不同空間相對位置下避雷索對被保護物的雷電防護概率,獲得了避雷索、金屬避雷線在正、負極性放電下的雷電保護范圍,并與傳統(tǒng)金屬避雷線保護范圍、滾球法屏蔽范圍理論值進行了對比,繪得雷電保護范圍的對比曲線。本文利用計算機仿真對避雷索的雷電預擊穿階段的電場分布和幾何模型進行了研究,考慮避雷索高度和雷電脈沖極性的變化對擊距的影響,建立了在正、負極性脈沖下雷電擊距的計算公式。保護范圍試驗結果顯示正極性下避雷索的保護范圍和滾球法計算結果接近,負極性下的保護范圍差距較大,表明滾球法對避雷索雷電保護范圍的評估不夠精確。本文利用橢圓模型公式對避雷索保護范圍進行計算,正、負極性試驗下所得數(shù)據(jù)和計算結果能夠很好的吻合。研究結果表明橢圓模型對避雷索雷電保護范圍的評估是有效的且相比滾球法更加精確,紐扣間隙0.5mm比lmm的避雷索的雷電保護性能更優(yōu)。避雷索的保護特性能夠滿足雷電防護設計的要求,對其雷電防護范圍具有為新型輕質等離子體傳導式避雷索廣泛應用于浮空器的雷電防護設計提供依據(jù)。
[Abstract]:A new type of light-weight plasma conducting lightning arrester is introduced in this paper as a new type of lightning protection device on floating air. At present, there is a lack of experimental research on its lightning protection characteristics. The purpose of this paper is to evaluate the lightning shock distance and protection range of lightning arrester through the experimental study of lightning protection characteristics of lightning protection cable, and to compare with the lightning protection performance of traditional lightning protection wire. In the experiment, the lightning arrester is placed in the structure of the rod-plate discharge, and the rod electrode is used to simulate the natural lightning down lead, and the rod conductor next to the lightning arrester is used to simulate the protected object. Based on the above test method, the range of lightning protection was evaluated by rolling ball method. The lightning protection characteristics of 1.2m high and 0.5 mm ~ 1mm button gap were simulated with lightning protection probability greater than 90%. The lightning protection probabilities of lightning arresting cables to protected objects in different space relative positions are counted, and the lightning protection range of lightning protection cable, metal lightning protection line under positive and negative discharge is obtained, and the range of lightning protection is compared with traditional metal lightning protection line. The theoretical values of shielding range of rolling ball method are compared and the contrast curve of lightning protection range is drawn. In this paper, the electric field distribution and geometric model of lightning arrester are studied by computer simulation. Considering the influence of lightning rod height and lightning pulse polarity on the strike distance, a positive model is established. The calculation formula of lightning shock distance under negative polarity pulse. The experimental results of protection range show that the range of lightning protection under positive polarity is close to that calculated by rolling ball method, but the range of protection range under negative polarity is quite different, which indicates that the evaluation of lightning protection range by rolling ball method is not accurate enough. In this paper, the range of lightning protection is calculated by using the elliptic model formula. The data obtained from the positive and negative polarity tests are in good agreement with the calculated results. The results show that the elliptic model is effective and more accurate than the rolling ball method in evaluating the range of lightning protection of lightning arresters, and the 0.5mm with button gap is better than the lightning protection of lmm. The protection characteristics of lightning protection cable can meet the requirements of lightning protection design, and the range of lightning protection can provide the basis for the new type of light plasma conductive lightning protection cable widely used in the lightning protection design of floating air cooler.
【學位授予單位】：合肥工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：V242

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本文編號：2086783