本文選題：高速鐵路 + 高架橋　； 參考：《高壓電器》2017年08期

【摘要】：雷害是影響高速鐵路安全穩(wěn)定運(yùn)行的關(guān)鍵因素之一,研究雷電先導(dǎo)作用下高速鐵路周?chē)妶?chǎng)的變化規(guī)律對(duì)于高速鐵路雷擊機(jī)理的闡明具有重要意義。文中結(jié)合先導(dǎo)法建立了高速鐵路三維雷擊仿真模型;通過(guò)調(diào)整導(dǎo)體攜帶電荷量、高度及側(cè)面距離,來(lái)模擬不同雷電流幅值以及先導(dǎo)空間位置對(duì)高速鐵路周?chē)妶?chǎng)分布的影響;并對(duì)比分析了高架區(qū)段和路基區(qū)段高速鐵路周?chē)鷪?chǎng)強(qiáng)分布情況。研究發(fā)現(xiàn),在雷電流幅值為數(shù)千安時(shí),高速鐵路周?chē)杂猩闲邢葘?dǎo)產(chǎn)生,因此認(rèn)為在雷擊計(jì)算中,雷電流較小情況仍需考慮上行先導(dǎo);隨著雷電流幅值、下行先導(dǎo)空間位置的變化,避雷線(xiàn)總是比其他導(dǎo)線(xiàn)更容易產(chǎn)生上行先導(dǎo);高架區(qū)段接觸網(wǎng)場(chǎng)強(qiáng)值約為路基區(qū)段的1.4倍,因此高速鐵路雷電防護(hù)的防雷設(shè)計(jì)施工要求高架區(qū)段應(yīng)高于路基區(qū)段。
[Abstract]:Lightning damage is one of the key factors that affect the safe and stable operation of high-speed railway. It is of great significance to study the variation of electric field around high-speed railway under the action of lightning guide for the elucidation of lightning strike mechanism of high-speed railway. In this paper, a three-dimensional lightning strike simulation model of high-speed railway is established by combining the lead method, and the influence of different lightning current amplitude and pilot space position on the electric field distribution around high-speed railway is simulated by adjusting the charge carrying capacity, height and side distance of the conductor. The field intensity distribution around high-speed railway in elevated section and subgrade section is compared and analyzed. It is found that when the lightning current amplitude is thousands of amperes, there is still an uplink lead around the high-speed railway. Therefore, it is considered that in the calculation of lightning stroke, the upstream forerunner should still be taken into account when the lightning current is small, and with the lightning current amplitude, With the change of the space position of the downlink guide, the lightning protection line is always more likely to produce the upward lead than other conductors, and the field strength of the overhead OCS is about 1.4 times that of the roadbed. Therefore, the design and construction of lightning protection of high speed railway should be higher than the section of roadbed.
【作者單位】： 西南交通大學(xué)電氣工程學(xué)院;
【基金】：中央高校基本科研業(yè)務(wù)費(fèi)專(zhuān)項(xiàng)資金資助(2682014CX022) 國(guó)家自然科學(xué)基金資助(51507145)~~
【分類(lèi)號(hào)】：U298

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