本文關(guān)鍵詞： 建筑物寬度 上行閃電 數(shù)值模擬 啟動條件 傳播影響　出處：《電瓷避雷器》2017年05期 　論文類型：期刊論文

【摘要】：為了研究建筑物寬度變化對于上行閃電傳播的影響,采用了上行閃電的隨機放電參數(shù)化方案,對上行閃電進行了二維高分辨率下的模擬。結(jié)果顯示:(1)當上行閃電起始后單向通道垂直向上發(fā)展一段距離,通道比較暗,分支比較小;(2)上行閃電發(fā)展到達2 km左右后,閃電通道的大部分分支將會產(chǎn)生許多小的分叉,其中部分分叉將會在高電荷密度中心處出現(xiàn),另一部分分叉則繞過高電荷密度中心,向水平方向延伸發(fā)展;(3)隨著建筑物寬度增加,上行閃電的通道總步長、上行閃電的水平延伸、垂直延伸有所增加、垂直延伸距離在3.1km-3.4km范圍內(nèi)變化。對建筑物上行閃電起始位置的研究,能夠?qū)ㄖ镫娪勘Ｗo器的安裝、選型等工作提供科學的指導意義。
[Abstract]:In order to study the effect of building width change on uplink lightning propagation, a random discharge parameterization scheme is proposed. The two dimensional high resolution simulation of uplink lightning is carried out. The results show that: 1) when the uplink lightning starts, the one-way channel develops a distance vertically upward, the channel is dark, the branch is smaller, and the uplink lightning develops to about 2 km. Most branches of the lightning channel will produce many small bifurcations, some of which will occur at the center of high charge density, and some will bypass the center of high charge density. With the increase of the width of the building, the total step length of the uplink lightning passage, the horizontal extension of the uplink lightning, and the vertical extension of the uplink lightning increase. The vertical extension distance varies in the range of 3.1 km-3.4 km. The study of the starting position of the building's upward lightning can provide scientific guidance for the installation and selection of building surge protectors.
【作者單位】： 國網(wǎng)信陽供電公司;
【分類號】：P427.3;TU895
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本文編號：1524489