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

【摘要】：本文介紹的自主研發(fā)的新型輕質(zhì)等離子體傳導(dǎo)式避雷索作為浮空器上新型的雷電防護(hù)裝置,目前缺少對(duì)其雷電防護(hù)特性的試驗(yàn)研究。本論文的目的是通過對(duì)避雷索的雷電防護(hù)特性進(jìn)行試驗(yàn)研究,評(píng)估其雷電擊距和保護(hù)范圍,并與傳統(tǒng)避雷線的雷電防護(hù)性能進(jìn)行對(duì)比。試驗(yàn)時(shí)將避雷索放置在棒—板放電結(jié)構(gòu)中,用棒電極模擬自然雷電下行先導(dǎo),置于避雷索旁的棒形導(dǎo)體模擬被保護(hù)物�；谏鲜鲈囼�(yàn)方法,應(yīng)用滾球法對(duì)其雷電保護(hù)范圍進(jìn)行評(píng)估,以雷電防護(hù)概率大于90%為限值,對(duì)高1.2m,紐扣間隙0.5mm、1mm避雷索的雷電防護(hù)特性進(jìn)行了模擬雷擊試驗(yàn),統(tǒng)計(jì)不同空間相對(duì)位置下避雷索對(duì)被保護(hù)物的雷電防護(hù)概率,獲得了避雷索、金屬避雷線在正、負(fù)極性放電下的雷電保護(hù)范圍,并與傳統(tǒng)金屬避雷線保護(hù)范圍、滾球法屏蔽范圍理論值進(jìn)行了對(duì)比,繪得雷電保護(hù)范圍的對(duì)比曲線。本文利用計(jì)算機(jī)仿真對(duì)避雷索的雷電預(yù)擊穿階段的電場分布和幾何模型進(jìn)行了研究,考慮避雷索高度和雷電脈沖極性的變化對(duì)擊距的影響,建立了在正、負(fù)極性脈沖下雷電擊距的計(jì)算公式。保護(hù)范圍試驗(yàn)結(jié)果顯示正極性下避雷索的保護(hù)范圍和滾球法計(jì)算結(jié)果接近,負(fù)極性下的保護(hù)范圍差距較大,表明滾球法對(duì)避雷索雷電保護(hù)范圍的評(píng)估不夠精確。本文利用橢圓模型公式對(duì)避雷索保護(hù)范圍進(jìn)行計(jì)算,正、負(fù)極性試驗(yàn)下所得數(shù)據(jù)和計(jì)算結(jié)果能夠很好的吻合。研究結(jié)果表明橢圓模型對(duì)避雷索雷電保護(hù)范圍的評(píng)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(hù)性能更優(yōu)。避雷索的保護(hù)特性能夠滿足雷電防護(hù)設(shè)計(jì)的要求,對(duì)其雷電防護(hù)范圍具有為新型輕質(zhì)等離子體傳導(dǎo)式避雷索廣泛應(yīng)用于浮空器的雷電防護(hù)設(shè)計(jì)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(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：V242

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本文編號(hào)：2086783