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)定運行的關(guān)鍵因素之一,研究雷電先導作用下高速鐵路周圍電場的變化規(guī)律對于高速鐵路雷擊機理的闡明具有重要意義。文中結(jié)合先導法建立了高速鐵路三維雷擊仿真模型;通過調(diào)整導體攜帶電荷量、高度及側(cè)面距離,來模擬不同雷電流幅值以及先導空間位置對高速鐵路周圍電場分布的影響;并對比分析了高架區(qū)段和路基區(qū)段高速鐵路周圍場強分布情況。研究發(fā)現(xiàn),在雷電流幅值為數(shù)千安時,高速鐵路周圍仍有上行先導產(chǎn)生,因此認為在雷擊計算中,雷電流較小情況仍需考慮上行先導;隨著雷電流幅值、下行先導空間位置的變化,避雷線總是比其他導線更容易產(chǎn)生上行先導;高架區(qū)段接觸網(wǎng)場強值約為路基區(qū)段的1.4倍,因此高速鐵路雷電防護的防雷設(shè)計施工要求高架區(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】： 西南交通大學電氣工程學院;
【基金】：中央高�；究蒲袠I(yè)務(wù)費專項資金資助(2682014CX022) 國家自然科學基金資助(51507145)~~
【分類號】：U298

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1 孫可平,于格非,潘曉東;粉體柱型料倉電場數(shù)值計算及安全技術(shù)評價的研究[J];上海海運學院學報;1998年01期

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本文編號：1830159