高压电器2017，Vol.53Issue(8)：22-27,6.DOI:10.13296/j.1001-1609.hva.2017.08.004
雷电发展对高速铁路周围电场分布影响的研究
Effect of Lightning Development on Electric Field Distribution Around High-speed Railway
摘要
Abstract
To understand the change of electric field strength around high-speed railway under the effect of lightning downward leader and further reveal the lightning mechanism of high-speed railway,leader progression model is adapted to build a three-dimensional lightning strike model.By adjusting the charge,height and lateral distance of the conductor,the effects of lightning current amplitude and progression of downward leader nearby the earth on the electric field strength distribution around high-speed railway are simulated,and the electric field strength distribution in viaduct section is compared with that in rail-bed section.Results show that upward leader still occurs around high-speed railway while the amplitude of lightning current is several kiloamperes.It is proposed that upward leader should be considered even under little lightning current in lightning calculation.Research finds that lightning wire generates upward leader easier than the other conductors while adjusting the space location of downward leader and changing amplitude of lightning current.And it finds that electric field strength of viaduct section is 40％ higher than that of roadbed section,so lightning protection designation and construction requirement of high-speed railway in viaduct section should be higher than that in roadbed section.关键词
高速铁路/高架桥/下行先导/电场分布Key words
high-speed railway/viaduct/downward leader/electric field distribution引用本文复制引用
李瑞芳,金亮..雷电发展对高速铁路周围电场分布影响的研究[J].高压电器,2017,53(8):22-27,6.基金项目
中央高校基本科研业务费专项资金资助(2682014CX022) （2682014CX022）
国家自然科学基金资助(51507145).Project Supported by the Fundamental Research Funds for the Central Universities(2682014CX022),the National Natural Science Foundation of China(51507145). （51507145）
