雷击时地下空间电磁场与负载感应电磁场的仿真计算  

Simulation calculation on electromagnetic field in underground space and load induced electromagnetic field in case of lightning

作　　者：赵洪磊[1,2] 刘全桢[2] 张笑 王殿生 

机构地区：[1]中国石油大学<华东>理学院,山东省高校新能源物理与材料科学重点实验室,山东青岛266580 [2]中国石油化工股份有限公司青岛安全工程研究院,山东青岛266071

出　　处：《中国安全生产科学技术》2015年第3期123-128,共6页Journal of Safety Science and Technology

基　　金：国家"十二五"科技支撑计划课题项目(2012BAK03B03);中央高校基本科研业务费专项资金资助项目(13CX05017A;14CX02026A)

摘　　要：随着高新电子技术的迅猛发展,雷电电磁辐射给人们的生产生活造成的危害越来越大。为了分析雷电电磁辐射的危害,基于MTLE雷电回击模型,以及北京地区实测雷电流波形,采用三维时域有限差分(FDTD)方法,计算了雷击时地下空间中的电磁场,并对线缆终端负载进行了雷电电磁耦合,计算了负载上的雷电感应电压和感应电流。计算结果表明,土壤对雷电电磁场的屏蔽并不彻底,地下空间仍需要进行防雷设计;线缆终端负载上感应的电压和电流峰值可达数百千伏和数百安培,并且其数值随雷电波波头时间的减小而增大,对当前大多数自动化系统危害严重。With the rapid development of high-tech electronic technology , the damage made by LEMP to people＆#39;s production and life is becoming bigger .To analyze the damage of LEMP , the lightning induced electromagnetic field in underground space was calculated by using FDTD method based on MTLE lightning return-stroke model and the measured lightning current waveform in Beijing .The electromagnetic coupling of the cable terminal load was conducted , and the lightning induced voltage and current on load were calculated .The results showed that soil shielding against lightning induced electromagnetic field is not complete , and lightning protection design is still needed in underground space .The peak values of lightning induced voltage and current on load can up to hundreds of kilo-volts and hundreds of amperes , and the values increase with the decrease of front time of lightning currents , which causes serious harm to most of the current automation systems .

关 键 词：雷电电磁辐射 FDTD仿真 地下空间 感应电压 感应电流 

分 类 号：X959[环境科学与工程—安全科学]